Proposal of QAM-OFDM System with DSI and IDAR Method in Satellite Channel(Advanced Technology-II)

概要

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The future satellite communication systems are required to support the higher transmission data rate for providing the multimedia services by employing the efficient modulation method such as multi-level QAM. However, the employment of conventional single carrier transmission method with multi-level QAM would cause the fatal degradation of signal quality due to the non-linear amplifiers located at the earth station and satellite. To overcome this problem, we have proposed the multi-level QAM-OFDM technique with IDAR method designed for non-linear satellite channel. However, the proposed method could not mitigate the non-linear distortion sufficiently when modulation level becomes higher such as 64QAM. This paper proposes the combined scheme for PAPR reduction method employed at the transmitter and OFDM-IDAR method employed at the receiver so as to enable the usage of higher multi-level QAM method. The proposed method can achieve the higher transmission data rate with keeping the better bit error rate performance even in the non-linear satellite channel. The various computer simulations are conducted in this paper to verify the effectiveness of proposed method in the non-linear satellite channel.
社団法人電子情報通信学会の論文
2005-10-07