DocumentCode :
1610345
Title :
Space-time coding-assisted double-spread RAKE receiver-based CDMA for dispersive Rayleigh fading environments
Author :
Ng, S.X. ; Yang, L.-L. ; Liew, T.H. ; Hanzo, L.
Author_Institution :
Dept. of Electron. & Comput. Sci., Southampton Univ., UK
Volume :
4
fYear :
2002
fDate :
6/24/1905 12:00:00 AM
Firstpage :
1670
Abstract :
We propose a novel space-time coding-assisted double-spread RAKE receiver (STC-DS-RR) based CDMA scheme for downlink (base to mobile) transmissions over dispersive Rayleigh fading channels. The STC-DS-RR scheme invokes turbo convolutional (TC) channel coding and space-time block coding (STBC) for achieving both time and space diversity gains in addition to the path diversity gain provided by the dispersive Rayleigh fading environments. The double-spreading mechanism of the STC-DS-RR scheme is capable of detecting the wanted user´s channel-impaired wideband signals with the aid of a low-complexity RAKE receiver, without resorting to complex multi-user detection. The performance of the proposed scheme was investigated using quadrature-phase-shift-keying (QPSK), when communicating over dispersive channels. It was shown that the wideband scheme advocated is capable of achieving Eb/N0 gains up to 35 dB in comparison to an uncoded narrowband single-transmitter scheme.
Keywords :
Rayleigh channels; block codes; channel coding; code division multiple access; convolutional codes; dispersive channels; diversity reception; land mobile radio; multipath channels; multiuser channels; quadrature phase shift keying; radio links; radio receivers; signal detection; spread spectrum communication; turbo codes; QPSK; STBC; STC-DS-RR based CDMA; channel-impaired wideband signal detection; dispersive Rayleigh fading environments; double-spread RAKE receiver; downlink; low-complexity RAKE receiver; multi-user detection; narrowband single-transmitter; path diversity gain; quadrature-phase-shift-keying; space diversity gain; space-time block coding; space-time coding; time diversity gain; turbo convolutional channel coding; Convolution; Convolutional codes; Dispersion; Diversity methods; Downlink; Fading; Multiaccess communication; Multipath channels; Rayleigh channels; Wideband;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Vehicular Technology Conference, 2002. VTC Spring 2002. IEEE 55th
Print_ISBN :
0-7803-7484-3
Type :
conf
DOI :
10.1109/VTC.2002.1002904
Filename :
1002904
Link To Document :
بازگشت