Title :
Robust detection of transmit diversity for wideband CDMA systems
Author :
Renucci, Pascal G. ; Toussi, Karim N. ; Banerjee, Debarag N.
Abstract :
The 3GPP WCDMA specification requires that the mobile terminal supports space time transmit diversity (STTD) encoding of various physical channels on the downlink, meaning that it needs to know if any physical channel is STTD encoded. We propose an efficient and robust algorithm to detect STTD on the downlink by correlating the received signal at the mobile with the known patterns of the downlink synchronization channel (SCH) and the primary common pilot channel (P-CPICH). The correlation result is used to estimate the binary-valued relative phase between SCH and P-CPICH, which is set at the base station transmitter depending on whether STTD is used or not. Near-optimum practical decision metrics are introduced and a statistical analysis of the proposed method is also provided.
Keywords :
3G mobile communication; cellular radio; code division multiple access; correlation methods; diversity reception; fading channels; multipath channels; space-time codes; statistical analysis; synchronisation; 3GPP; P-CPICH; WCDMA; downlink SCH known patterns; downlink synchronization channel; multipath fading; physical channel STTD encoding; primary common pilot channel; received signal correlation; space time transmit diversity encoding; statistical analysis; transmit diversity robust detection; wideband CDMA systems; wireless cellular networks; Base stations; Diversity methods; Diversity reception; Downlink; Fading; Multiaccess communication; Radio link; Robustness; Transmitting antennas; Wideband;
Conference_Titel :
Vehicular Technology Conference, 2004. VTC2004-Fall. 2004 IEEE 60th
Print_ISBN :
0-7803-8521-7
DOI :
10.1109/VETECF.2004.1400340
