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Analytical BER Evaluation of ZF Transmit Beamformer with Channel Estimation Error
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- Authors
- Seung Jae Bahng
- Issue Date
- 2007-08
- Citation
- IEICE Transactions on Communications, v.E90-B, no.8, pp.2097-2102
- ISSN
- 0916-8516
- Publisher
- 일본, 전자정보통신학회 (IEICE)
- Language
- English
- Type
- Journal Article
- Abstract
- The minimum mean square error (MMSE) multiple antenna transmission scheme for a code division multiple access (CDMA) system was recently developed by Choi and Perreau [1]. In this paper, we first show that the zero-forcing (ZF) transmit beamformer for multiple antenna CDMA system has the same form as the MMSE beamformer given by Choi and Perreau. We then develop an analytical method to obtain a closed-form expression of the bit error rate (BER) of the ZF transmit beamformer when there are channel estimation errors. The analytical and simulation results show good agreement, and confirm the importance of accurate channel state information (CSI) at the transmitter when using the ZF transmit beamformer. Copyright © 2007 The Institute of Electronics, Information and Communication Engineers.
- KSP Keywords
- Analytical Method, Bit Error Rate(And BER), CDMA systems, Channel State Information(CSI), Channel estimation(CE), Closed-form expressions, Code division Multiple Access(CDMA), Information and communication, Minimum Mean Square Error(MMSE), Transmission scheme, Transmit beamformer