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首页> 外文会议>IEEE International Symposium on Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications vol.2; 20050808-12; Beijing(CN) >DECISION AIDED CHANNEL ESTIMATION IN CLIPPED OFDM
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DECISION AIDED CHANNEL ESTIMATION IN CLIPPED OFDM

机译：裁剪的OFDM中的决策辅助信道估计

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摘要

Clipping is a popular and simple method to overcome large peak-to-average power ratio (PAPR) in orthogonal frequency-division multiplexing (OFDM) systems, but it results in a nonlinear distortion, which degrades the performance of channel estimation and signal detection. In this paper, clipping effect on channel estimation is analyzed, a decision-aided channel estimation method to mitigate the clipping distortion is developed and its potential gain in channel estimation is derived. The gain can be obtained by an iterative channel estimation and signal detection process. Theoretical and simulation results show that the decision aided method can effectively improve the performance of channel estimation in clipped OFDM.
机译：削波是克服正交频分多路复用（OFDM）系统中大峰均功率比（PAPR）的一种流行且简单的方法，但会导致非线性失真，从而降低信道估计和信号检测的性能。本文分析了削波对信道估计的影响，提出了一种减轻削波失真的决策辅助信道估计方法，并推导了其在信道估计中的潜在增益。增益可以通过迭代信道估计和信号检测过程获得。理论和仿真结果表明，该决策辅助方法可以有效提高限幅OFDM系统中信道估计的性能。

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