Title :
Class of Minimum Bit Error Rate Algorithms
Author :
Samir, Tamer A. ; Elnoubi, Said ; Elnashar, Ayman
Author_Institution :
Dept. of Mobile Network Dev., Etihad Etisalat, Riyadh
Abstract :
A class of adaptive beamforming algorithms was proposed based on directly minimizing the bit-error rate (BER). The popular linear minimum bit error rate (MBER) stochastic beamforming algorithms suffer from low convergence speed and large training data. In this paper, we investigate the use of adaptive stochastic gradient-Newton normalized MBER algorithms in the design of linear beamformer receivers for multipath Rayleigh fading DS-CDMA systems. Simulation analyses show the enhancements in convergence rate and BER performance of the proposed algorithms over the popular minimum mean squared error (MMSE) and other MBER based algorithms in the cost of complexity.
Keywords :
Newton method; Rayleigh channels; array signal processing; code division multiple access; error statistics; gradient methods; multipath channels; spread spectrum communication; adaptive beamforming algorithms; adaptive stochastic gradient-Newton normalized MBER algorithms; linear beamformer receivers; minimum bit error rate algorithms; minimum mean squared error; multipath Rayleigh fading DS-CDMA systems; stochastic beamforming algorithms; Algorithm design and analysis; Analytical models; Array signal processing; Bit error rate; Convergence; Multiaccess communication; Rayleigh channels; Stochastic processes; Stochastic systems; Training data; Adaptive beamforming; BER; DS-CDMA; MMSE; Rayleigh fading; stochastic gradient algorithms;
Conference_Titel :
Advanced Communication Technology, The 9th International Conference on
Conference_Location :
Gangwon-Do
Print_ISBN :
978-89-5519-131-8
DOI :
10.1109/ICACT.2007.358331
