Title :
Combining space-time block coding with diversity antenna selection for improved downlink performance
Author :
Katz, Marcos ; Tiirola, Esa ; Ylitalo, Juha
Author_Institution :
IP Mobility Networks, Nokia Networks, Oulu, Finland
fDate :
6/23/1905 12:00:00 AM
Abstract :
A closed-loop method combining N-out-of-M antenna selection and space-time block coding from the selected antennas is proposed and studied in this paper. Performance is evaluated for WCDMA parameters in both frequency nonselective Rayleigh fading channels and in frequency selective (Vehicular A) channels. Operation in intra- and inter-cell dominant interference scenarios is considered. Numerical results show that the additional antenna selection procedure brings a supplementary uncoded BER performance improvement in the range of approximately 2-3.5 dB for flat-fading channels and 0.8-1.5 dB for frequency selective channels (@BER=12%). A suboptimum selection scheme requiring only a single bit for antenna selection is also presented. In addition, the impact on performance of errors in the feedback channel is investigated in this paper.
Keywords :
Rayleigh channels; block codes; cellular radio; channel coding; code division multiple access; diversity reception; error statistics; mobile radio; radiofrequency interference; BER performance improvement; N-out-of-M antenna selection; Rayleigh fading channels; W-CDMA parameters; closed-loop method; diversity antenna selection; downlink performance improvement; feedback channel; flat-fading channels; frequency nonselective channels; frequency selective channels; inter-cell dominant interference; intra-cell dominant interference; space-time block coding; suboptimum selection scheme; Antenna measurements; Block codes; Diversity methods; Diversity reception; Downlink; Fading; Feedback; Frequency; Receiving antennas; Transmitting antennas;
Conference_Titel :
Vehicular Technology Conference, 2001. VTC 2001 Fall. IEEE VTS 54th
Print_ISBN :
0-7803-7005-8
DOI :
10.1109/VTC.2001.956581
