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15-07-0933-00-0ban-binary-cdma-ban

VIEWS: 19 PAGES: 21

  • pg 1
									  November 2007                                               doc.: IEEE 802.15-<15-07-0933-00-0ban>

     Project: IEEE P802.15 Working Group for Wireless Personal Area Networks
                                    (WPANs)

Submission Title: [Binary CDMA for BAN]
Date Submitted: [9 Nov., 2007]
Source: [Changsoo Eun, Seung-Moon Ryu] Company [CNU, Casuh, Inc.]
Address [813 Leaders Building, 342-1 Yatap-dong, Bundang-gu, Seongnam, Gyeonggi-do 463-070,
Korea ]
Voice:[+82-31-709-5577], FAX: [+82-31-709-5578], E-Mail:[eun@ieee.org, retaw@casuh.com]
Re: [Contribution to IEEE 802.15 SG-BAN Meeting, November 2007]

Abstract: [This document presents Binary CDMA: a constant envelope CDMA air interface for
          short range BAN applications.]
Purpose: [Proposal]
Notice: This document has been prepared to assist the IEEE P802.15. It is offered as a basis for
discussion and is not binding on the contributing individual(s) or organization(s). The material in this
document is subject to change in form and content after further study. The contributor(s) reserve(s)
the right to add, amend or withdraw material contained herein.
Release: The contributor acknowledges and accepts that this contribution becomes the property of
IEEE and may be made publicly available by P802.15.

  Submission                                     Slide 1                                     Casuh, Inc.
November 2007                 doc.: IEEE 802.15-<15-07-0933-00-0ban>




   Binary CDMA for BAN
                Casuh, Inc.




Submission          Slide 2                                Casuh, Inc.
November 2007                                 doc.: IEEE 802.15-<15-07-0933-00-0ban>


                    What is Binary CDMA?
 • What is binary CDMA?

                                                                               Data1
  Data1                                                         Casuh Code 1
             Casuh Code 1                                                      Data2
  Data2
                                                                Casuh Code 2
             Casuh Code 2         TDMA           TDMA
                            M
  Data3                                                                        Data3
                                   RF             RF            Casuh Code 3
             Casuh Code 3
  Data4                                                                        Data4
             Casuh Code 4                                       Casuh Code 4
  Data n
             Casuh Code n                                                      Data n
                                                                Casuh Code n




           – Constant RF envelope
             • RF amplifiers with high linearity are not necessary.
           – Simple circuitry
           – Support both CDMA and TDMA
Submission                          Slide 3                                     Casuh, Inc.
November 2007                                    doc.: IEEE 802.15-<15-07-0933-00-0ban>


                      What is Binary CDMA?
 • How to generate B-CDMA
                               13

      d1(t)        e1(t)       11                d1(t)       e1(t)
              X                                          X
                                 9
              c1(t)              7                       c1(t)
     d2(t)        e2(t)          5               d2(t)       e2(t)
              X                                          X
                                 3   Tr = 1




                                                                     Encoding
                           
              c2(t)              1                       c2(t)                   Binary
                                      Binary                                     CDMA
                                -1
              ……




                                                         ……
                                      CDMA
                                -3
                                -5
      dn(t)       en(t)         -7               dn(t)       en(t)
              X                 -9                       X
                               -11
              cn(t)                                      cn(t)
                               -13     n : odd
Submission                           Slide 4                                    Casuh, Inc.
November 2007                                doc.: IEEE 802.15-<15-07-0933-00-0ban>


                 What is Binary CDMA?
 • PW(pulse width) and SB (sign bit)
                                                                       5
                                                            3
                         Tc                        1

      Truncated Signal
                                        -1
                              -3
                         -5



       PW modulated
       Signal            -5   -3        -1     1           3


                                                   1        1          1
       Sign Bit Signal
                         -1   -1        -1



Submission                         Slide 5                                 Casuh, Inc.
November 2007                    doc.: IEEE 802.15-<15-07-0933-00-0ban>


                Error Performance
• Error performance of
  SB-CDMA
    – 64-bit code




Submission             Slide 6                                 Casuh, Inc.
November 2007                                                                        doc.: IEEE 802.15-<15-07-0933-00-0ban>


                        Error Performance
 • Another simulation
                    0
                                                       Binary CDMA BER Performance
                   10
                                                                                                          7ch casuh64
                                                                                                          7ch casuh128
                                                                                                          5ch walsh64
                                                                                                          1ch casuh64


                    -1
                   10




                    -2
                   10
             BER




                    -3
                   10




                    -4
                   10




                    -5
                   10




                    -6
                   10
                         -22   -20   -18   -16   -14           -12          -10      -8   -6   -4    -2              0
                                                                SNR(dB)




Submission                                                  Slide 7                                                      Casuh, Inc.
November 2007                                                                             doc.: IEEE 802.15-<15-07-0933-00-0ban>


                         Error Performance
 • Another simulation
                    0
                                                       Binary CDMA BER Performance
                   10
                                                                                                        7ch 64casuh
                                                                                                        7ch 128casuh
                                                                                                        5ch 64walsh
                                                                                                        7ch 64casuh nonclipping
                                                                                                        1ch 64casuh
                    -1
                   10




                    -2
                   10
             BER




                    -3
                   10




                    -4
                   10




                    -5
                   10




                    -6
                   10
                         -22   -20   -18   -16   -14           -12          -10      -8      -6    -4            -2               0
                                                                SNR(dB)




Submission                                                     Slide 8                                                                Casuh, Inc.
November 2007                                                                                  doc.: IEEE 802.15-<15-07-0933-00-0ban>


                         Error Performance
 • Another simulation
                    0
                                                 Binary CDMA BER Performance By Codeset
                   10
                                                                                                             64c 1,2,3,4,5,6,7
                                                                                                             64c 6,7,8,9,10,11,12
                                                                                                             64c 6,12,18,24,30,36,42
                                                                                                             64c 18,21,24,27,30,33,36
                                                                                                             64c 3,8,15,24,35,48,63
                    -1                                                                                       128c 1,2,3,4,5,6,7
                   10
                                                                                                             128c 6,7,8,9,10,11,12
                                                                                                             128c 6,12,18,24,30,36,42
                                                                                                             128c 18,21,24,27,30,33,36
                                                                                                             128c 3,8,15,24,35,48,63

                    -2
                   10
             BER




                    -3
                   10




                    -4
                   10




                    -5
                   10




                    -6
                   10
                         -22   -20   -18   -16    -14          -12          -10           -8      -6    -4              -2               0
                                                                SNR(dB)




Submission                                                       Slide 9                                                                     Casuh, Inc.
November 2007                                                                         doc.: IEEE 802.15-<15-07-0933-00-0ban>


                         Error Performance
 • Another simulation
                    0
                                            Binary CDMA BER Performance(64bit Casuh
                   10




                    -1
                   10




                    -2
                   10
             BER




                    -3
                   10




                    -4
                   10

                          1channel
                          3channel
                          5channel
                          7channel
                    -5
                          9channel
                   10     11channel
                          13channel
                          15channel
                          19channel
                          25channel

                    -6
                   10
                          -20         -15             -10                       -5          0          5
                                                            SNR(dB)




Submission                                                  Slide 10                                                Casuh, Inc.
November 2007                                                                          doc.: IEEE 802.15-<15-07-0933-00-0ban>


                         Error Performance
 • Another simulation
                    0
                                           Binary CDMA BER Performance(128bit Casuh)
                   10




                    -1
                   10




                    -2
                   10
             BER




                    -3
                   10




                    -4
                   10

                         1channel
                         3channel
                         5channel
                         7channel
                    -5
                         9channel
                   10    11channel
                         13channel
                         15channel
                         17channel
                         19channel
                         25channel
                    -6
                   10
                            -20      -15              -10                       -5          0          5
                                                            SNR(dB)




Submission                                                   Slide 11                                                Casuh, Inc.
November 2007                                                 doc.: IEEE 802.15-<15-07-0933-00-0ban>


    Binary CDMA without Loss
 • CS/CDMA
                d1
                      Block A
                d2    orthogonal   Ci
                      code set
                d3    C1 ~ C8
                                                                        Correlator
                                                               c1                                            d1
                d4




                                                                                     max absolute value Ci
                d5                                                                                           d2
                      Block A                                           Correlator
                                   Cj



                                        Encoding
                d6    orthogonal                               c2
                      code set                                                                               d3
                d7    C9 ~ C16

                d8                                                      Correlator
                                                               c3                                            •
                d9                                                                                           •
                    Block A                                                                                  •

                d10 orthogonal     Ck                               •
                    code set                                        •

                d11 C17 ~ C24                                       •

                                                                                                             d12
                d12
                                                                        Correlator
                p1                                             c32
                      Block A
                p2    orthogonal   Cp
                      code set
                p3    C25 ~ C32
                p4



Submission                                         Slide 12                                                        Casuh, Inc.
November 2007                                                                         doc.: IEEE 802.15-<15-07-0933-00-0ban>


                Error Performance
 • Comparison of error performances
       – Without amplifier nonlinearity
                                  1.E+00




                                  1.E-01




                                  1.E-02
                 Bit Error Rate




                                  1.E-03




                                  1.E-04


                                                        multi-code
                                  1.E-05                HC CDMA w /ecc (9/16)
                                                        HC CDMA w /ecc (27/64)
                                                        CA CS CDMA (9/16)
                                                        CA CS CDMA (15/64)
                                  1.E-06                PW CDMA (17/64)



                                  1.E-07
                                           -1   0   1   2    3       4   5    6   7   8   9   10   11   12
                                                                          Eb/No



Submission                                                           Slide 13                                       Casuh, Inc.
November 2007                                                                              doc.: IEEE 802.15-<15-07-0933-00-0ban>


                Error Performance
 • Comparison of error performances
       – With amplifier nonlinearity
                                                                                            Saturated
                                  1.E+00
                                                                                             Channel
                                  1.E-01



                                  1.E-02




                                                         Ideal
                                  1.E-03
                 Bit Error Rate




                                  1.E-04
                                                        Channel

                                  1.E-05                    multi-code

                                                            multi-code(hpa)
                                  1.E-06
                                                            HC CDMA w/ecc

                                                            HC CDMA (hpa) w/ecc
                                  1.E-07



                                  1.E-08
                                           -1   0   1   2       3        4    5    6   7    8   9   10   11   12
                                                                               Eb/No
                                                                              Eb /N0
Submission                                                          Slide 14                                             Casuh, Inc.
November 2007                                    doc.: IEEE 802.15-<15-07-0933-00-0ban>


             Introduction of Retaw
 • Retaw (reversed ‘w-a-t-e-r’)
       – Retaw is a proprietary PHY/MAC specification.
       – Chips for short-range applications are already
         available.
             •   Wireless multi-channel translation system
             •   Wireless conference system
             •   Pico-net digital broadcasting system
             •    Multiple wireless microphone system
       – Technologies in Retaw
             • PHY
                 – Binary CDMA for baseband
                 – ZigBee RF Compatible
             • MAC
                 – Uniformed Super Frame Structure
                 – Proprietary protocol


Submission                            Slide 15                                 Casuh, Inc.
November 2007                                   doc.: IEEE 802.15-<15-07-0933-00-0ban>


             Introduction of Retaw
 • Features of Retaw
       – Low power consumption
             • Deep sleep possible
       – Low interference
       – Simultaneous communications
             • Peer-to-peer
             • Point-to-multipoint
       –     Simple (cheap) hardware
       –     Support for scalable data rate up to 3.2 Mbps
       –     Inherent security
       –     Very simple MAC
       –     Accommodates more than 100 devices
       –     Multiple simultaneous network operation


Submission                           Slide 16                                 Casuh, Inc.
November 2007                                 doc.: IEEE 802.15-<15-07-0933-00-0ban>

                    Evolution of Retaw
• Retaw: Now and Future
                        Retaw-1 (Now)                 Retaw-2 (Future)
      Carrier Freq.           2.4 G                     400M, 900M, 2.4G
     Protocol Clock                                         62.5 K, 1 M
                             1 Mbps
          Rate
       Data Rate         10 K - 3.2 Mbps                50 bps - 3.2 Mbps
  Power Consumption
     (active/sleep)       30 mA/50 µA                (100 µA - 20 mA)/10 µA

    RF Modulation           GFSK, MSK                       MSK, QPSK
   Preamble length           128 bits                     8 bits, 128 bits
       Baseband         HC/CDMA, TDMA                Long Code, SB/CDMA,
      Modulation                                             TDMA
                           Peer-to-peer,                   Retaw1 +
         Topology       Point-to-multipoint           Multi-hop/Multi-link
                                                    Retaw1 + Mobile Video,
      Applications      Audio, Voice, Data                 USN, BAN

Submission                       Slide 17                                    Casuh, Inc.
November 2007                                                      doc.: IEEE 802.15-<15-07-0933-00-0ban>


                  Evolution of Retaw
• Retaw-2 = Enhanced Retaw-1 + ZigBee

                                   Code
       Data       S/P              word
                                    (16)


                        d1
                        d2         Ci
                        d3                                                           c1
                        d4
                                                                                                           d1

              S         d5
                                   Cj                                               c2                     d2
              /
                        d6
Data x 3                                                           ZigBee                                  d3
                                           Encoding




              P
                        d7
                        d8
                                                      ZigBee                                                     Data
                                                                     RF                 c3
                        d9
                        d10        Ck
                                                        RF                          •
                                                                                                       •
                                                                                                       •
                        d11                                                         •
                                                                                                       •
                                                                                    •
                        d12
                        p1                                                                                 d12
                        p2         Cp
                        p3
                                                                                     c32
                        p4


                                                                                                     High Data
      High Data


       Low Data                                                                                     Low Data
                              Long Code
                                                                                        Long Code

Submission                                              Slide 18                                           Casuh, Inc.
November 2007                                        doc.: IEEE 802.15-<15-07-0933-00-0ban>


                Evolution of Retaw
 • Modes of Retaw-2
                  Mode 1     Mode 2          Mode 3         Mode 4 Remark
                   Binary                                      Long
         Type      CDMA        TDMA              ZigBee        Code
                  2.4G,900M 2.4G,900M                        2.4G,900       Synch
    Frequency        400M     ,400M
                                                  2.4G
                                                             M, 400M       Two PHY
                                                             62.5bps/
     Data Rate    800K/100K 3.6M/800K            250K                     Pure data
                                                              7.8bps
   # Simul. Ch.    7 x 16       16                 16        Over 100
       Code
                     64          -               16 / 32      16000
      Length
      Multiple     Synch -                                   Synch -
                                LBT         CSMA-CA
      Access       CDMA                                      CDMA
                    Multi                                    Secure
    Application    channel
                             Multimedia          Sensor
                                                             control
Submission                            Slide 19                                     Casuh, Inc.
November 2007                                         doc.: IEEE 802.15-<15-07-0933-00-0ban>


                         Evolution of Retaw
 • Retaw for BAN
                               Requirements                       Retaw
      Operating Range        In, on, or around Body               Up to 3 m
         Data Rate                  Scalable               Few Kbps - few Mbps
        Frequency              Unlicensed & MIC           402-405 M, ISM, UWB
        Peak Power                                         Few μW - few 10mW
                                    Scalable
       Consumption
                                                             Up to 5 pico-nets
         Coexistence             No interference
                                                          Up to 100 devices/net
                                                              Peer-to-peer,
             Connection            Virtual path
                                                            Peer-to-multipoint
             Topology       Multiple simultaneous link      Multi-hop/Multi-link
                                                          Authentication, privacy,
              Security                High                      encryption
         Future Proof              Realizable               Proven technology
          Location                  Desirable                      Few cm
Submission                               Slide 20                                    Casuh, Inc.
November 2007                      doc.: IEEE 802.15-<15-07-0933-00-0ban>


                Evolution of Retaw
 • Retaw for BAN
       – Secure channel procurement
       – QoS
       – Low power consumption
       – Synchronized dual PHY (Avoid mutual
         interference)
       – Scalable data rate (Adaptive process
         gain)
       – Reliable link connection (Relay)

Submission              Slide 21                                 Casuh, Inc.

								
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