Postdetection Phase Combining Diversity

Masaharu Ikura; Fumiyuki Adachi

doi:10.1109/25.293648

Postdetection Phase Combining Diversity

Masaharu Ikura, Fumiyuki Adachi

Research output: Contribution to journal › Article › peer-review

12 Citations (Scopus)

Abstract

We propose a postdetection phase combining (PC) scheme for the two branch diversity reception of differential phase shift keying (DPSK) over multipath fading channels. The receiver has a differential phase detector (DPD) in each diversity branch, and the combiner weights each detector output in proportion to the vth power of the signal envelope at the detector's input. For π/4-shift QDPSK over frequency-flat Rayleigh fading channels, we find via computer simulation that the optimum weight factor is v = 2, and that our simple, practical combining scheme performs almost as well as postdetection maximal ratio combining (MRC). We demonstrate similar relative performances for frequency-selective fading channels and for channels with cochannel interference (CCI).

Original language	English
Pages (from-to)	298-303
Number of pages	6
Journal	IEEE Transactions on Vehicular Technology
Volume	43
Issue number	2
DOIs	https://doi.org/10.1109/25.293648
Publication status	Published - 1994 May
Externally published	Yes

ASJC Scopus subject areas

Automotive Engineering
Aerospace Engineering
Electrical and Electronic Engineering
Applied Mathematics

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AB - We propose a postdetection phase combining (PC) scheme for the two branch diversity reception of differential phase shift keying (DPSK) over multipath fading channels. The receiver has a differential phase detector (DPD) in each diversity branch, and the combiner weights each detector output in proportion to the vth power of the signal envelope at the detector's input. For π/4-shift QDPSK over frequency-flat Rayleigh fading channels, we find via computer simulation that the optimum weight factor is v = 2, and that our simple, practical combining scheme performs almost as well as postdetection maximal ratio combining (MRC). We demonstrate similar relative performances for frequency-selective fading channels and for channels with cochannel interference (CCI).

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Postdetection Phase Combining Diversity

Abstract

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