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Performance Analysis of Time-Reversal Based Precoding Schemes in MISO-OFDM Systems

机译:MISO-OFDM系统中基于时间反转的预编码方案的性能分析

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Time-Reversal (TR) precoding schemes are regarded as promising candidates for robust and energy efficient wireless systems. These schemes are characterized by their low computational complexity at the receiver side. In multipath Rayleigh fading channel, this paper presents analytical expressions of the average bit error rate (BER) of TR technique and the Equal Gain Transmission (EGT) scheme in MISO-OFDM systems. It further provides simple and tight upper bounds on the ergodic capacity of these schemes. Hence, these theoretical analyses might be very useful to avoid lengthy simulations. It also provides an interesting conclusion: for large number of transmit antennas, i.e. in Massive MIMO, TR technique outperforms the EGT scheme and its performance approaches that of Maximum Ratio Transmission (MRT) scheme. Hence, it confirms the applicability of TR scheme in the future Massive MIMO systems. Results with LTE-A system parameters are provided in order to corroborate our analysis.
机译:时间逆转(TR)预编码方案被认为是健壮且节能的无线系统的有希望的候选方案。这些方案的特点是在接收方的计算复杂度低。在多径瑞利衰落信道中,本文给出了MISO-OFDM系统中TR技术的平均误码率(BER)和等增益传输(EGT)方案的解析表达式。它进一步为这些方案的遍历容量提供了简单而严格的上限。因此,这些理论分析对于避免冗长的仿真可能非常有用。它还提供了一个有趣的结论:对于大量的发射天线,即在大规模MIMO中,TR技术的性能优于EGT方案,其性能接近最大比传输(MRT)方案。因此,它确认了TR方案在未来的Massive MIMO系统中的适用性。提供了带有LTE-A系统参数的结果,以证实我们的分析。

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