基于干扰子空间抑制的宽带CDMA近远抗单用户信道识别

2001 IEEE Third Workshop on Signal Processing Advances in Wireless Communications (SPAWC'01). Workshop Proceedings (Cat. No.01EX471) Pub Date : 2001-03-20 DOI:10.1109/SPAWC.2001.923842

S. Affes, H. Hansen, P. Mermelstein

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引用次数: 9

摘要

单用户CDMA时空阵列接收机(STAR-SU)可以通过加入干扰子空间抑制(ISR)的时空零波束形成技术扩展到多用户版本(STAR-MU)。我们可以利用那里实现的数据投影步骤来增强STAR-SU的信道识别，使其对近远功率变化的鲁棒性明显高于以前的公式。我们的方法有效地将MU子空间跟踪分解为更简单的单用户1D子空间跟踪操作。对下行链路的仿真表明，即使在近远比高达18 dB的情况下，新型STAR-SU的性能也接近单用户边界。

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Near-far resistant single-user channel identification by interference subspace rejection in wideband CDMA

The single-user CDMA spatio-temporal array receiver (STAR-SU) can be extended to a multiuser version (STAR-MU) by incorporating interference subspace rejection (ISR) using spatio-temporal null-beamforming. We can exploit the data-projection step implemented there to enhance the channel identification for STAR-SU so that it is significantly more robust to near-far power variations than the previous formulation. Our approach effectively decomposes the MU subspace tracking into much simpler single-user 1D subspace tracking operations. Simulations on the downlink reveal that the performance of the new STAR-SU is close to the single-user bound even for near-far ratios as high as 18 dB.

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来源期刊

2001 IEEE Third Workshop on Signal Processing Advances in Wireless Communications (SPAWC'01). Workshop Proceedings (Cat. No.01EX471)

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