Postdetection Selection Diversity Reception with Correlated, Unequal Average Power Rayleigh Fading Signals for π/4-Shift QDPSK Mobile Radio

Fumiyuki Adachi; Koji Ohno; Masaharu Ikura

doi:10.1109/25.142778

Postdetection Selection Diversity Reception with Correlated, Unequal Average Power Rayleigh Fading Signals for π/4-Shift QDPSK Mobile Radio

Fumiyuki Adachi, Koji Ohno, Masaharu Ikura

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

24 Citations (Scopus)

Abstract

The diversity gain degradations due to fading correlation and unequal average power are investigated for practical, two-branch postdetection selection diversity reception. The average bit error rate (BER) of π/4-shift QDPSK is theoretically analyzed taking into account additive white Gaussian noise (AWGN), cochannel interference, and multipath channel delay spread; exact diversity gain degradations are calculated. This paper also presents very simple and useful approximate expressions for the gain degradations. When the fading correlation and the power ratio between the two antennas are given by h₁₂(| h₁₂ |≦1) and q (≦1), respectively, the total gain degradation is D = 51og{q(l - |h₁₂|²)} dB if the errors are caused by AWGN, while it is 51og{2q(l — |h₁₂|²)/(1 + q²)} dB if cochannel interference and delay spread are the cause of errors.

Original language	English
Pages (from-to)	199-210
Number of pages	12
Journal	IEEE Transactions on Vehicular Technology
Volume	41
Issue number	2
DOIs	https://doi.org/10.1109/25.142778
Publication status	Published - 1992 May
Externally published	Yes

ASJC Scopus subject areas

Automotive Engineering
Aerospace Engineering
Electrical and Electronic Engineering
Applied Mathematics

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10.1109/25.142778

Cite this

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title = "Postdetection Selection Diversity Reception with Correlated, Unequal Average Power Rayleigh Fading Signals for π/4-Shift QDPSK Mobile Radio",

abstract = "The diversity gain degradations due to fading correlation and unequal average power are investigated for practical, two-branch postdetection selection diversity reception. The average bit error rate (BER) of π/4-shift QDPSK is theoretically analyzed taking into account additive white Gaussian noise (AWGN), cochannel interference, and multipath channel delay spread; exact diversity gain degradations are calculated. This paper also presents very simple and useful approximate expressions for the gain degradations. When the fading correlation and the power ratio between the two antennas are given by h12(| h12 |≦1) and q (≦1), respectively, the total gain degradation is D = 51og{q(l - |h12|2)} dB if the errors are caused by AWGN, while it is 51og{2q(l — |h12|2)/(1 + q2)} dB if cochannel interference and delay spread are the cause of errors.",

author = "Fumiyuki Adachi and Koji Ohno and Masaharu Ikura",

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AU - Ikura, Masaharu

PY - 1992/5

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N2 - The diversity gain degradations due to fading correlation and unequal average power are investigated for practical, two-branch postdetection selection diversity reception. The average bit error rate (BER) of π/4-shift QDPSK is theoretically analyzed taking into account additive white Gaussian noise (AWGN), cochannel interference, and multipath channel delay spread; exact diversity gain degradations are calculated. This paper also presents very simple and useful approximate expressions for the gain degradations. When the fading correlation and the power ratio between the two antennas are given by h12(| h12 |≦1) and q (≦1), respectively, the total gain degradation is D = 51og{q(l - |h12|2)} dB if the errors are caused by AWGN, while it is 51og{2q(l — |h12|2)/(1 + q2)} dB if cochannel interference and delay spread are the cause of errors.

AB - The diversity gain degradations due to fading correlation and unequal average power are investigated for practical, two-branch postdetection selection diversity reception. The average bit error rate (BER) of π/4-shift QDPSK is theoretically analyzed taking into account additive white Gaussian noise (AWGN), cochannel interference, and multipath channel delay spread; exact diversity gain degradations are calculated. This paper also presents very simple and useful approximate expressions for the gain degradations. When the fading correlation and the power ratio between the two antennas are given by h12(| h12 |≦1) and q (≦1), respectively, the total gain degradation is D = 51og{q(l - |h12|2)} dB if the errors are caused by AWGN, while it is 51og{2q(l — |h12|2)/(1 + q2)} dB if cochannel interference and delay spread are the cause of errors.

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Postdetection Selection Diversity Reception with Correlated, Unequal Average Power Rayleigh Fading Signals for π/4-Shift QDPSK Mobile Radio

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