時間サンプルの復元によるOFDM信号へのインパルス雑音の影響の軽減

概要

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In OFDM transmission, performance is degraded by the existence of time domain impulse noise because this noise has very wide bandwidth, and it affects all the carriers in the OFDM signal. Especially, the influence of impulse noise with large amplitude couse severe degradation[8]. In this paper, a scheme that reduces the influence of impulse noise is proposed. In the proposed scheme, the symbols after decision are re-modulated to generate a time domain OFDM signal to replace the samples that are degraded by the impulse noise in the time domain. The time domain OFDM signal is demodulated again after the influence of the impulse noise is reduced. This results in an improvemed of bit error rate. Moreover, the peformance of the proposed scheme can be further improved by applying it iteratively.
社団法人映像情報メディア学会の論文
2006-05-01