Sensitivity of SIMO blind equalizers to the channel precursor magnitude

J. Mannerkoski, V. Koivunen
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Abstract

The performance of one blind channel identification algorithm and three blind equalizers is studied. The main concern is in investigating their behavior when the communication channel has little energy in the beginning of its response. In our previous experiments, the equalizers' performance has not been satisfactory for such channels. All considered equalizers are based on a pseudo-inversion of a block-Toeplitz matrix. We study the effect of the channel precursor magnitude on the singular values of the matrix and consequently on the equalizer performance. For each algorithm, scatter plots are used to evaluate the success of the equalization under various conditions. We provide an explanation to the success or failure of the equalizers, based on the magnitude of the singular values.
SIMO盲均衡器对信道前驱幅值的灵敏度
研究了一种盲信道识别算法和三种盲均衡器的性能。主要关注的是调查他们的行为,当通信渠道在其响应的开始没有多少能量。在我们之前的实验中,均衡器的性能并不令人满意。所有考虑的均衡器都是基于块toeplitz矩阵的伪反演。我们研究了信道前驱量对矩阵奇异值的影响,进而对均衡器性能的影响。对于每种算法,散点图用于评估在各种条件下均衡的成功。我们根据奇异值的大小给出了均衡器的成功或失败的解释。
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