Title :
Multipath combining scheme in single-carrier transmission systems
Author :
Wang, Jieling ; Yang, Hong ; Yi, Kechu
Author_Institution :
State Key Labs. of Integrated Services Networks, Xidian Univ., Xi´´an, China
Abstract :
In this letter, we introduce and investigate the RAKE combining receiver which is widely used in the code-division multiple access (CDMA) systems to the non-spectrum-spreading single-carrier transmission system. The initial estimate of the transmitted data is obtained by linear single-carrier equalizers, and then all the multipath signals are constructed from this initial solution and channel impulse response. By interference cancellation (IC) technique, we can acquire every multipath component in the received signal after cancelling the sum of all the other multipath signals constructed. Finally, all the components are combined together using selection combining (SC), equal gain combining (EGC) or maximal ratio combining (MRC), so that temporal diversity gain from the combined output can be obtained. Simulation results show that bit error rate (BER) performance of the new combining receiver based on zero forcing (ZF) and minimum mean square error (MMSE) equalizers can achieve the SNR gain dramatically in the SUI-5 wireless communication link.
Keywords :
code division multiple access; diversity reception; equalisers; error statistics; interference suppression; least mean squares methods; radio receivers; BER performance; CDMA systems; MMSE equalizer; RAKE combining receiver; SNR gain; SUI-5 wireless communication link; bit error rate; channel impulse response; code division multiple access systems; equal gain combining; interference cancellation technique; linear single-carrier equalizers; maximal ratio combining; minimum mean square error equalizer; multipath combining scheme; selection combining; single-carrier transmission systems; temporal diversity gain; zero forcing equalizer; Bit error rate; Diversity methods; Diversity reception; Equalizers; Interference cancellation; Mean square error methods; Multiaccess communication; Performance gain; RAKE receivers; Wireless communication; Frequency selective fading; single-carrier equalization; equal gain combining; maximal ratio combining;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2009.090806
