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Linear Receiver for the Uplink in Distributed Antenna Systems

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4 Author(s)
Jun Yang ; Dept. of Electr. & Comput. Eng., Queen''s Univ., Kingston, ON, Canada ; Il-Min Kim ; Dong In Kim ; Chan, F.

We consider the uplink of a distributed antenna system (DAS) in the presence of interference and unknown oscillator offsets, which lead to synchronization errors. For this scenario, we develop a linear receiver which maximizes the output signal-to-interference-plus-noise ratio (SINR). Specifically, we first propose a new structured generalized sidelobe canceller (SGSC) formulation for the commonly used minimum-variance receiver, and derive a general framework to improve the robustness of a linear receiver when oscillator offsets exist. Then a new linear receiver is proposed in closed-form based on the proposed robust SGSC and a ridge regression technique. It is shown by simulations that the proposed linear receiver can provide very robust SINR performance and excellent symbol error rate (SER) performance in the existence of interference and unknown oscillator offsets.

Published in:

Wireless Communications, IEEE Transactions on  (Volume:11 ,  Issue: 11 )