Radio Resource Management untuk Sistem Komunikasi Ultra Wide Band (UWB) Staff : Muhammad Asvial Students :- Sponsors : RUUI 2007 Email contact : email@example.com The emerging Ultra Wide Band (UWB) communication system offers a great potential for a design of high speed short range wireless communications which fully support high data streaming capacity. This can be achieved by exploiting both spatial and multipath diversity using of MIMO OFDM system and proper coding techniques. The systems combine MIMO antenna and OFDM technique which reliable in high data rate transmission even in multipath environment. It also overcomes delay spread distortion and unflat fading caused by multipath channels. Multipath signal propagation has long been thought as an impairment limiting the system capacity and reliable communication in wireless channels, together with the constraint of power and bandwidth. In MIMO-OFDM for UWB communication system, this multipath propagation due the rich scattering in wireless channels is used to improve achieavable data rate and link quality. As the number of antennas at both the ends is increasing, the capacity is increases linearly with the minimum of the number of transmit and receive antennas for a given fixed signal to noise ration (SNR), even if the fades between antenna pairs are correlated. In particular, the analytical expression has been derived for the ergodic capacity in independent and identically distributed Rayleight flat fading MIMO channels in integral form involving the Laguerre polynomials by numericlly evaluating the integrals to find the ergodic capacity for different numbers of transmit and receive antennas in MIMO-OFDM environment. In this research, radio resource management, including system simulation and MIMO-OFDM channel modeling for UWB communication system is proposed by applying the concept of decomposition of frequency selective fading channel into parallel flat fading channel in the frequency domain. This frequency domain channel model is used to present the performance for different data rates. The concept of decoupling of frequency selective channel into spatial domain by presenting SVD based approach is developed to decouple flat fading MIMO channels to orthogonal spatial channels. The SVD based spatial domain decoupling is combined with FFT based frequency domain decoupling to obtain UWB MIMO OFDM parallel channel model. The simulation and theoretical analysis can be implemented in high speed short range UWB communication systems by applying a rate selection technique base on channel condition. The channel capacity and BER are evaluated for different SNR with and without CSI environments. The results show that the system capacity and BER of MIMO-OFDM for UWB communication system can be achieved by increasing signal to noise ratio.
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