Applying Frequency-Domain Equalization to Code-Division Multiple Access and Transform-Domain Communications Systems

Alfred A Tamayo

ISBN 10: 1025085353 / ISBN 13: 9781025085357

Published by Creative Media Partners, LLC Mai 2025, 2025

About this Item

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Seller Inventory # 9781025085357

Bibliographic Details

• Title: Applying Frequency-Domain Equalization to Code-Division Multiple Access and Transform-Domain Communications Systems
• Publisher: Creative Media Partners, LLC Mai 2025
• Publication Date: 2025
• Language: English
• ISBN 10: 1025085353
• ISBN 13: 9781025085357
• Binding: Taschenbuch
• Condition: Neu
• Dimensions: 234W x 156H x 4D millimeters 234 millimeters width by 156 millimeters height by 4 millimeters depth
• Weight: 118 grams

About this title

Synopsis

This research examined the theory and application of using discrete multi-tone (DMT) frequency-domain equalization (FEQ) with communications systems that inherently posses null-tones in their respective transmission frequencies. DMT-FEQ relies on null-tones to equalize a non-ideal channel. A Hadamard encoded code division multiple access (CDMA) communications system with up to 32 synchronous users nd a transform domain communications system TDCS) with one user were investigated. Both communications systems were stimulated while operating with real channel data corrupted by noise. Simulation results showed that the Hadamard encoded CDMA system worked well with DMT-FEQ only when the transmission signal obeyed DMT-FEQ null-tone conditions in conjuction with a vector estimation method. Simulation results also showed that modifications to TDCS with a conjugate-symmetric phase component in conjunction with a modified spectral mask with consecutive null-tones and forced null-tones provided acceptable results when equalizing with DMT-FEQ.

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