Abstract
摘要: 该文针对稀疏多径信道环境中的MIMO-OFDM系统所存在的IQ不平衡问题，提出了一种IQ不平衡参数和信道的联合估计方法。推导了联合估计的时域模型，提出了基于l1l2优化模型和平行坐标下降算法的联合估计算法。仿真结果表明，所提方法与传统的频域最小二乘算法和匹配追踪算法相比，显著提高了系统性能。 关键词: 无线通信 / MIMO / OFDM / IQ不平衡 / 稀疏多径信道 / 估计
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