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Reduced-complexity sparsity-aware joint phase noise mitigation and channel equalization in OFDM receivers

机译:OFDM接收机中降低复杂性的稀疏感知联合相位噪声缓解和信道均衡

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摘要

A major performance and complexity limitation in direct-conversion broadband wireless transceivers is the phase noise (PN) resulting from the inevitable imperfections in the fabrication process of the crystal oscillator. PN induces inter-carrier interference in orthogonal frequency division multiplexing (OFDM) transceivers. Assuming the availability of inaccurate PN and channel estimates, in this paper, we propose an efficient low-complexity sparsity-based design for joint PN mitigation and channel equalization in OFDM systems. Moreover, we analyze the maximum expected coherence metric for the sparsifying matrix that is used in our approach which provides some insight into its performance. Finally, our numerical simulations demonstrate the effectiveness of our proposed compensation approach compared to the state-of-the-art designs in terms of both performance and computational complexity.
机译:直接转换宽带无线收发器的主要性能和复杂性限制是由于晶体振荡器制造过程中不可避免的缺陷而引起的相位噪声(PN)。 PN在正交频分复用(OFDM)收发器中引起载波间干扰。假设存在不准确的PN和信道估计,本文针对OFDM系统中的PN缓解和信道均衡提出了一种有效的基于低复杂度稀疏性的设计。此外,我们分析了在我们的方法中使用的稀疏矩阵的最大期望相干度量,这为它的性能提供了一些见识。最后,我们的数值模拟从性能和计算复杂性两方面证明了我们提出的补偿方法与最新设计相比的有效性。

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