A Low Complexity Carrier Frequency Offsets Correction Method for MIMO OFDM Systems with Distributed Transmit Antennas
电子学报2010年38卷第7期 页码:1688-1692
作者机构:
电子科技大学通信抗干扰技术国家级重点实验室,四川,成都,611731
作者简介:
基金信息:
DOI:
中图分类号:TN914
纸质出版:2010
稿件说明:
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FONT face, Verdana, 孙科, 等. 分布式发射天线MIMO OFDM的一种低复杂度频偏校正算法[J]. 电子学报, 2010,38(7):1688-1692.
FONT face, Verdana, SUN Ke, et al. A Low Complexity Carrier Frequency Offsets Correction Method for MIMO OFDM Systems with Distributed Transmit Antennas[J]. Acta Electronica Sinica, 2010, 38(7): 1688-1692.
FONT face, Verdana, 孙科, 等. 分布式发射天线MIMO OFDM的一种低复杂度频偏校正算法[J]. 电子学报, 2010,38(7):1688-1692.DOI:
FONT face, Verdana, SUN Ke, et al. A Low Complexity Carrier Frequency Offsets Correction Method for MIMO OFDM Systems with Distributed Transmit Antennas[J]. Acta Electronica Sinica, 2010, 38(7): 1688-1692.DOI:
<FONT face=Verdana>In multi-input multi-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems with distributed transmit antennas
each transmit antenna has its own oscillator
which leads to different frequency offsets (FOs) between the receiver and each transmit antenna. In order to reduce the inter-carrier interference caused by the FOs
a FOs correction algorithm is proposed
which maximizes the conditional average signal-to-interference-and-noise ratio (SINR) of subcarriers on each receive antenna. By properly exploiting the polynomial approximation method to approximate the conditional average SINR
a computationally efficient expression of the FOs correction value is obtained. Compared with the existing FOs correction algorithm
the proposed algorithm offers slight performance improvement and achieves at least 50% complexity reduction.