Low-complexity transceiver design scheme based on channel null-space feedback |
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Authors: | NI Ji-qing FEI Ze-song XING Cheng-wen and KUANG Jing-ming |
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Affiliation: | School of Information and Electronics, Beijing Institute of Technology, Beijing 100081, China;School of Information and Electronics, Beijing Institute of Technology, Beijing 100081, China;School of Information and Electronics, Beijing Institute of Technology, Beijing 100081, China;School of Information and Electronics, Beijing Institute of Technology, Beijing 100081, China |
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Abstract: | To reduce the negative impact of channel quantization errors, a low-complexity transceiver joint design scheme for both the transmit beamformers and receive combining vectors is proposed in the two-user multiple-input multiple-output (MIMO) system. In the scheme, the channel null-space quantization vector is used as the transmit beamformer of the interference user directly based on channel null-space feedback. Since the interference can be determined at the receiver, interference rejection combining (IRC) is jointly utilized to cancel the inter-user interference. Simulation results show that the proposed scheme can provide substantial sum-rate improvement especially at high SNR. |
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Keywords: | limited feedback channel null-space quantization interference rejection combining |
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