A Novel Efficient Cluster-Based MLSE Equalizer for Satellite Communication Channels with-QAM Signaling
A Novel Efficient Cluster-Based MLSE Equalizer for Satellite Communication Channels with-QAM Signaling
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DOI：
10.1155/asp/2006/34343
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发表时间：
2006-05
影响因子：
1.9
通讯作者：
Eleftherios Kofidis;V. Dalakas;Y. Kopsinis;S. Theodoridis
中科院分区：
文献类型：
--
作者：
Eleftherios Kofidis;V. Dalakas;Y. Kopsinis;S. Theodoridis
在卫星中，接近饱和时使用的非线性放大器会使发射信号严重失真，并造成接收困难。然而，由无记忆带通放大器引入的非线性保持了正交幅度调制（-QAM）星座的对称性。在本文中，基于集群的序列均衡器（CBSE），利用这些对称性。与传统的线性横向均衡器、沃尔泰拉均衡器和RBF网络均衡器相比，该均衡器具有更高的性能。此外，这种性能上的增益是以显著更低的计算成本获得的。
In satellites, nonlinear amplifiers used near saturation severely distort the transmitted signal and cause difficulties in its reception. Nevertheless, the nonlinearities introduced by memoryless bandpass amplifiers preserve the symmetries of the-ary quadrature amplitude modulation (-QAM) constellation. In this paper, a cluster-based sequence equalizer (CBSE) that takes advantage of these symmetries is presented. The proposed equalizer exhibits enhanced performance compared to other techniques, including the conventional linear transversal equalizer, Volterra equalizers, and RBF network equalizers. Moreover, this gain in performance is obtained at a substantially lower computational cost.