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Simulation of the uplink of JD-CDMA mobile radio systems with coherent receiver antenna diversity

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Abstract

Due to time variant multipath propagation, both intersymbol interference and multiple access interference occur at CDMA receivers. These degrading effects can be combatted by joint detection (JD) techniques. In order to reduce the performance impairments resulting from time variance, coherent receiver antenna diversity (CRAD) can be used. In the present paper, a system model of CDMA mobile radio systems using various JD techniques in combination with CRAD shall be considered. This system model is an evolution of the pan-European GSM and takes important real world aspects such as imperfect channel estimation, nonlinear amplification and D/A and A/D conversion into account. The viability of JD with CRAD shall be demonstrated by bit error rate simulations of this system model. It is shown that by using JD with two receiver antennas in bad urban areas,E b/N0 < 8 dB per antenna is sufficient for a bit error rate of 10−2, andE b/N0 < 11 dB per antenna is required for a bit error rate of 10−3.

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Abbreviations

AWGN:

Additive white Gaussian noise

A/D:

Analog-to-digital

BU:

Bad urban

CDMA:

Code division multiple access

COST:

European Co-operation in the Field of Scientific and Technical Research

CRAD:

Coherent receiver antenna diversity

cdf:

Cumulative distribution function

DMF:

Decorrelating matched filter

DMF-BDFE:

Decorrelating matched filter block decision feedback equalizer

D/A:

Digital-to-analog

EGC:

Equal-gain combining

FDMA:

Frequency division multiple access

GMSK:

Gaussian minimum shift keying

GSM:

Global System for Mobile Communications

ISI:

Intersymbol interference

JD:

Joint detection

JDC:

Japanese Digital Cellular

JD-CDMA:

Joint detection code division multiple access

MA:

Multiple access

MAI:

Multiple access interference

MMSE-BLE:

Minimum mean square error block linear equalizer

MMSE-BDFE:

Minimum mean square error block decision feedback equalizer

MRC:

Maximal-ratio combining

RA:

Rural area

SC:

Selection combining

SNR:

Signal-to-noise ratio

TDMA:

Time division multiple access

TU:

Typical urban

WSSUS:

Wide sense stationary uncorrelated scattering

ZF-BLE:

Zero forcing block linear equalizer

ZF-BDFE:

Zero forcing block decision feedback equalizer

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Authors and Affiliations

  1. Research Group for RF Communications, University of Kaiserslautern, P.O. Box 3049, D-67653, Kaiserslautern, Germany

    Peter Jung, Josef Blanz, Markus Na\han & Paul Walter Baier

Authors
  1. Peter Jung
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  2. Josef Blanz
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  3. Markus Na\han
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  4. Paul Walter Baier
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Jung, P., Blanz, J., Na\han, M. et al. Simulation of the uplink of JD-CDMA mobile radio systems with coherent receiver antenna diversity. Wireless Pers Commun 1, 61–89 (1994). https://doi.org/10.1007/BF01098505

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