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BER performance of anti-multipath modulation scheme PSK-VP and its optimum phase-waveform

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1 Author(s)
Takai, H. ; ATR Opt. & Radio Commun. Res. Labs., Kyoto, Japan

This paper proposes a new anti-multipath modulation scheme, which the author calls PSK-W (phase-shift-keying with varied phase), in which a time-varying phase-waveform is redundantly imposed on the DPSK timeslot. The relationship between the phase-waveform and BER (bit-error rate) is discussed by using an analytical approach which considers the diversity of received signal components that are continuously varying over a symbol period. A formula-type BER expression obtained by this analytical approach yields a maximum-diversity phase-waveform condition. A convex phase-waveform is considered to be the best choice because of this condition and an additional consideration for spectrum compactness. A numerical evaluation confirms the performance of PSK-VP with a convex phase-waveform and reveals a band-limitation effect. From the numerical evaluation, it is shown that the 4-ary version of PSK-VP with a convex phase-waveform has an excellent BER performance in multipath fading when the delay dissipation is less than 1.7 bits, although requiring about twice the bandwidth due to the imposed phase redundancy

Published in:

Vehicular Technology, IEEE Transactions on  (Volume:42 ,  Issue: 4 )