Abstract
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.
Original language | English |
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Article number | 6317111 |
Journal | IEEE Transactions on Wireless Communications |
Volume | 11 |
Issue number | 11 |
Pages (from-to) | 4161-4171 |
Number of pages | 11 |
ISSN | 1536-1276 |
DOIs | |
Publication status | Published - 2012 |
Externally published | Yes |
Bibliographical note
Funding Information:This work was supported in part by the Natural Sciences and Engineering Research Council (NSERC), and in part by the Ministry of Knowledge Economy (MKE), Korea, under the Information Technology Research Center (ITRC) support program supervised by the National IT Industry Promotion Agency (NIPA) (NIPA-2012-(H0301-12-1005)).
Keywords
- Distributed antenna systems
- linear receiver
- oscillator offsets
- synchronization error