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Joint Entropy Criterion for Training Time Domain Equalizer of OFDM System Without CP

机译:无CP的OFDM系统时域均衡器的联合熵准则。

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This paper describes a new criterion using the joint entropy in time domain to equalize the OFDM system without cyclic prefix (CP). We assume the transmitted and received OFDM symbols are jointly normal random variables, then a finite impulse response (FIR) time domain equalizer (TEQ) is trained given the concept of minimum joint entropy according to the least mean square (LMS) algorithm. We compare the performance of the new criterion against the minimum mean square equalizer (MMSE) in cancelling intersymbol interference (ISI) in terms of the reduction in mean square error (MSE) in the residual error sequence in different types of channels. The results demonstrate the superiority of the new strategy in low SNR and highly frequency selective channels, the new method also possesses faster convergence rate and lower sensitivity
机译:本文描述了一种新的准则,该准则使用时域的联合熵来均衡没有循环前缀(CP)的OFDM系统。我们假设发送和接收的OFDM符号共同是普通随机变量,然后根据最小均方(LMS)算法,在给出最小联合熵的概念的情况下训练有限冲激响应(FIR)时域均衡器(TEQ)。在减少符号间干扰(ISI)方面,我们将新准则与最小均方均衡器(MMSE)的性能进行了比较,以减少不同类型信道中残留误差序列中的均方误差(MSE)。实验结果表明,该方法在低信噪比和高频率选择性信道中具有优越性,并且收敛速度快,灵敏度低。

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