Proposal of QAM-OFDM System with IDAR Method Designed for Satellite Channel | Zendy

Pisit Boonsrimuang | Zendy; Tawil Paungma | Zendy; Hideo Kobayashi | Zendy

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Proposal of QAM-OFDM System with IDAR Method Designed for Satellite Channel

Author(s) -

Pisit Boonsrimuang,

Tawil Paungma,

Hideo Kobayashi

Publication year - 1970

Publication title -

ecti transactions on computer and information technology (ecti-cit)

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.132

H-Index - 2

ISSN - 2286-9131

DOI - 10.37936/ecti-cit.201262.54331

Subject(s) - quadrature amplitude modulation , communications satellite , computer science , orthogonal frequency division multiplexing , electronic engineering , qam , amplifier , channel (broadcasting) , transmission (telecommunications) , carrier to noise ratio , preamble , intermodulation , bit error rate , satellite , telecommunications , engineering , bandwidth (computing) , aerospace engineering

The future satellite communication systems are required to support the higher transmission data rate for providing multimedia services by employing the efficient modulation method such as multilevel QAM. However, the employment of conventional single carrier transmission method with multi-level QAM which has larger PAPR (Peak to Averaged Power Ratio) 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, this paper proposes broadband satellite communication systems by using the multilevel QAM-OFDM technique with IDAR (Improved Decision Aided Reconstruction) method, which is designed for satellite channel. In the IDAR method, the characteristics of non-linear amplifiers are required to be known at the receiver for mitigating the intermodulation noise. This paper also proposes the estimation method for AM-AM and AM-PM conversion characteristics of non-linear amplifiers by using low PAPR preamble symbols. The various computer simulations are conducted in this paper to verify the effectiveness of proposed system in the non-linear satellite channel.

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