Title :
On the Combination of Receive Beamforming with Alamouti Decoders
Author :
Sun, Chen ; Taromaru, Makoto ; Karmakar, Nemai C.
Author_Institution :
Dept. of Wireless Commun. Syst., ATR Wave Eng. Lab., Kyoto
Abstract :
We propose and compare two receiver structures that combine optimum receive beamforming, respectively, with the conventional Alamouti space-time block code (STBC) decoder and the minimum mean squared error (MMSE) decoder. The beamforming process suppresses co-channel interference (CCI) by maximizing the uplink signal to noise plus interference ratio (SINR). Co-antenna interference (CAI) is suppressed at the Alamouti STBC decoders. Simulation results show that both receivers significantly improve the bit error rate (BER) performance and increase the achieved channel capacities. The comparison of the two receivers indicates that, in the presence of beamforming, the conventional Alamouti decoder outperforms the MMSE decoder when there are sufficient degrees of freedom (DOF) at the receiver antenna array
Keywords :
antenna arrays; block codes; channel capacity; cochannel interference; decoding; error statistics; interference suppression; least mean squares methods; radio receivers; space-time codes; Alamouti space-time block code decoder; bit error rate performance; channel capacities; co-antenna interference suppression; co-channel interference suppression; minimum mean squared error decoder; optimum receive beamforming; receiver antenna array; receiver structures; uplink signal to noise plus interference ratio; Array signal processing; Bit error rate; Block codes; Computer aided instruction; Decoding; Interchannel interference; Interference suppression; Radiofrequency interference; Signal processing; Signal to noise ratio;
Conference_Titel :
Vehicular Technology Conference, 2006. VTC 2006-Spring. IEEE 63rd
Conference_Location :
Melbourne, Vic.
Print_ISBN :
0-7803-9391-0
Electronic_ISBN :
1550-2252
DOI :
10.1109/VETECS.2006.1683378
