A half-chip offset QPSK modulation CDMA scheme employing differential detection for advanced wireless LAN systems

Takatoshi Sugiyama; Masato Mizoguchi; Shuji Kubota

A half-chip offset QPSK modulation CDMA scheme employing differential detection for advanced wireless LAN systems

Takatoshi Sugiyama, Masato Mizoguchi, Shuji Kubota

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

Abstract

SUMMARY This paper proposes a half-chip offset QPSK (Quadrature Phase Shift Keying) modulation CDMA (Code Division Multiple Access) scheme to allow the simple differential detection while realizing a compact spectrum in nonlinear channels for wireless LAN systems. The experimental results show the proposed scheme achieves excellent Pe (probability of error) performances in ACI (adjacent channel interference) and CCI (co-channel interference) environments. Moreover, by employing time diversity and high-coding-gain FEC (Forward Error Correction), the half-chip offset QPSK-CDMA scheme realizes an improvement of 3.0 dB (in terms of Eb/No at a Pe of 10^-5) in Rician fading environments with a Doppler frequency fD of 10 Hz and a delay spread of 40 nsec.

Original language	English
Pages (from-to)	693-700
Number of pages	8
Journal	IEICE Transactions on Communications
Volume	E79-B
Issue number	5
Publication status	Published - 1996 Jan 1
Externally published	Yes

Keywords

Differential detection
Forward error correction
Frequency utilization efficiency
Nonlinear channel
Offset qpsk-cdma
Time diversity

ASJC Scopus subject areas

Software
Computer Networks and Communications
Electrical and Electronic Engineering

Cite this

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title = "A half-chip offset QPSK modulation CDMA scheme employing differential detection for advanced wireless LAN systems",

abstract = "SUMMARY This paper proposes a half-chip offset QPSK (Quadrature Phase Shift Keying) modulation CDMA (Code Division Multiple Access) scheme to allow the simple differential detection while realizing a compact spectrum in nonlinear channels for wireless LAN systems. The experimental results show the proposed scheme achieves excellent Pe (probability of error) performances in ACI (adjacent channel interference) and CCI (co-channel interference) environments. Moreover, by employing time diversity and high-coding-gain FEC (Forward Error Correction), the half-chip offset QPSK-CDMA scheme realizes an improvement of 3.0 dB (in terms of Eb/No at a Pe of 10-5) in Rician fading environments with a Doppler frequency fD of 10 Hz and a delay spread of 40 nsec.",

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AU - Sugiyama, Takatoshi

AU - Mizoguchi, Masato

AU - Kubota, Shuji

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Y1 - 1996/1/1

N2 - SUMMARY This paper proposes a half-chip offset QPSK (Quadrature Phase Shift Keying) modulation CDMA (Code Division Multiple Access) scheme to allow the simple differential detection while realizing a compact spectrum in nonlinear channels for wireless LAN systems. The experimental results show the proposed scheme achieves excellent Pe (probability of error) performances in ACI (adjacent channel interference) and CCI (co-channel interference) environments. Moreover, by employing time diversity and high-coding-gain FEC (Forward Error Correction), the half-chip offset QPSK-CDMA scheme realizes an improvement of 3.0 dB (in terms of Eb/No at a Pe of 10-5) in Rician fading environments with a Doppler frequency fD of 10 Hz and a delay spread of 40 nsec.

AB - SUMMARY This paper proposes a half-chip offset QPSK (Quadrature Phase Shift Keying) modulation CDMA (Code Division Multiple Access) scheme to allow the simple differential detection while realizing a compact spectrum in nonlinear channels for wireless LAN systems. The experimental results show the proposed scheme achieves excellent Pe (probability of error) performances in ACI (adjacent channel interference) and CCI (co-channel interference) environments. Moreover, by employing time diversity and high-coding-gain FEC (Forward Error Correction), the half-chip offset QPSK-CDMA scheme realizes an improvement of 3.0 dB (in terms of Eb/No at a Pe of 10-5) in Rician fading environments with a Doppler frequency fD of 10 Hz and a delay spread of 40 nsec.

KW - Differential detection

KW - Forward error correction

KW - Frequency utilization efficiency

KW - Nonlinear channel

KW - Offset qpsk-cdma

KW - Time diversity

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A half-chip offset QPSK modulation CDMA scheme employing differential detection for advanced wireless LAN systems

Abstract

Keywords

ASJC Scopus subject areas

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