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Performance Evaluation of Adaptive MMSE Receivers in Frequency Selective Fading Channels Using Aided Tentative Coefficients

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Last updated: 04 Jan 2025

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Abstract

Recently, the code division multiple access (CDMA) technique has become the most widely communication technique, because of its varity of applications. The well-known matched filter (MF) is considered as the optimum filter that recovers the CDMA signals. However; its performance recently becomes unsatisfying. This is due to increasing the multiple access interference (MAI), in addition to the other channel impairments such as the fading or the multi path interference (MPI). In this paper, an adaptive minimum mean square error-maximum likelihood (MMSE-ML) receiver is presented as an alternative solution to overcome the drawbacks of the MF receiver. This adaptive MMSE-ML receiver uses adaptive aided tentative coefficients in addition to the basic adaptive coefficients to increase the tracking ability of the channel impulse response variations. The performance of the adaptive MMSE-ML receiver is compared with the traditional adaptive MMSE receiver over a frequency selective fading channel. Moreover, the performances of both the presented and traditional adaptive receivers are compared with the performance of the MF under the same condition. It is found that the performance of the adaptive MMSE-ML receiver is much improved using the proposed technique.

DOI

10.21608/asat.2009.23523

Keywords

Code division multiple access (CDMA), minimum mean square error-maximum likelihood (MMSE-ML), matched filter (MF), multiple access interference (MAI), least mean square (LMS), single user matched filter (SUMF)

Authors

First Name

H.

Last Name

Abou Bakr

MiddleName

E.

Affiliation

Egyptian Armed Forces.

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Orcid

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First Name

Hany

Last Name

Mansour

MiddleName

A. A.

Affiliation

Egyptian Armed Forces.

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City

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Orcid

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Volume

13

Article Issue

AEROSPACE SCIENCES & AVIATION TECHNOLOGY, ASAT- 13, May 26 – 28, 2009

Related Issue

4377

Issue Date

2009-05-01

Receive Date

2019-01-03

Publish Date

2009-05-01

Page Start

1

Page End

11

Print ISSN

2090-0678

Online ISSN

2636-364X

Link

https://asat.journals.ekb.eg/article_23523.html

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https://asat.journals.ekb.eg/service?article_code=23523

Order

26

Type

Original Article

Type Code

737

Publication Type

Journal

Publication Title

International Conference on Aerospace Sciences and Aviation Technology

Publication Link

https://asat.journals.ekb.eg/

MainTitle

Performance Evaluation of Adaptive MMSE Receivers in Frequency Selective Fading Channels Using Aided Tentative Coefficients

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Article

Created At

22 Jan 2023