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Super-Resolution Sparse MIMO-OFDM Channel Estimation Based on Spatial and Temporal Correlations

机译:基于空间信息的超分辨率稀疏mImO-OFDm信道估计   和时间相关

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摘要

This letter proposes a parametric sparse multiple input multiple output(MIMO)-OFDM channel estimation scheme based on the finite rate of innovation(FRI) theory, whereby super-resolution estimates of path delays with arbitraryvalues can be achieved. Meanwhile, both the spatial and temporal correlationsof wireless MIMO channels are exploited to improve the accuracy of the channelestimation. For outdoor communication scenarios, where wireless channels aresparse in nature, path delays of different transmit-receive antenna pairs sharea common sparse pattern due to the spatial correlation of MIMO channels.Meanwhile, the channel sparse pattern is nearly unchanged during severaladjacent OFDM symbols due to the temporal correlation of MIMO channels. Bysimultaneously exploiting those MIMO channel characteristics, the proposedscheme performs better than existing state-of-the-art schemes. Furthermore, byjoint processing of signals associated with different antennas, the pilotoverhead can be reduced under the framework of the FRI theory.
机译:这封信提出了基于有限创新率(FRI)理论的参数稀疏多输入多输出(MIMO)-OFDM信道估计方案,从而可以实现具有任意值的路径延迟的超分辨率估计。同时,利用无线MIMO信道的空间和时间相关性来提高信道估计的准确性。对于本质上无线信道稀疏的户外通信场景,由于MIMO信道的空间相关性,不同发射/接收天线对的路径延迟共享一个共同的稀疏模式;同时,由于多个相邻的OFDM符号,信道稀疏模式几乎保持不变MIMO信道的时间相关性。通过同时利用这些MIMO信道特性,该方案的性能优于现有的最新方案。此外,通过联合处理与不同天线相关的信号,可以在FRI理论的框架下减少导频开销。

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