Inter-subcarrier interference compensation in the frequency-hopped single-carrier frequency division multiple access communication system

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Inter-subcarrier interference compensation in the frequency-hopped single-carrier frequency division multiple access communication system

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Single-carrier frequency division multiple access (SC-FDMA) system having very good characteristic on peak-to-average power ratio is promising in communication area. But the performance of SC-FDMA system is very sensitive to inter-subcarrier interference (ICI), and existing phase noise suppression algorithm has reduced just phase noise only. Therefore the authors propose effective method, phase noise and frequency offset suppression (PNFS) algorithm, using comb-type pilot. PNFS algorithm can suppress phase noise, carrier frequency offset and even Doppler effect simultaneously in frequency domain. Through PNFS algorithm, SC-FDMA system has robust characteristic against ICI of performance degradation. Moreover, in these days, most electronic communication systems are weak to jamming. So, frequency-hopped (FH) scheme, which is one kind of spread spectrum techniques as a means of making performance better to supplement a disadvantage of SC-FDMA system on jamming attack, is considered. The authors would like to analyse ICI and jamming in SC-FDMA system and employ FH technique in SC-FDMA system because existing studies have not considered the situation regarding ICI and jamming exist simultaneously in mobile channel. So, the authors analyse degradation factors in FH-SC-FDMA system about ICI and jamming signal categorised as partial band jamming and multi-tone jamming. Then, the proposed FH-SC-FDMA system using PNFS algorithm has strong performances about ICI and jamming.

Inspec keywords: interference suppression; frequency hop communication; Doppler effect; frequency division multiple access; spread spectrum communication; intercarrier interference

Other keywords: mobile channel; intersubcarrier interference compensation; spread spectrum techniques; frequency-hopped communication system; electronic communication systems; phase noise and frequency offset suppression algorithm; single-carrier frequency division multiple access; phase noise suppression algorithm; jamming signal; comb-type pilot; multitone jamming; SC-FDMA system; partial band jamming; Doppler effect

Subjects: Multiple access communication; Electromagnetic compatibility and interference; Radio links and equipment

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