Abstract
In this paper we propose a new class of ternary Zero Correlation Zone (ZCZ) sequence sets based on binary ZCZ sequence sets construction. It is shown that the proposed ternary ZCZ sequence sets can reach the upper bound on the ZCZ sequences. The performance of the proposed sequences set in asynchronous Direct Sequence-Code Division Multiple Access (DS-CDMA) system is evaluated. In the simulation we used two types of channels: Additive White Gaussian Noise (AWGN) and frequency non-selective fading with AWGN noise. The proposed ternary ZCZ sequence sets show better results, in term of Bit Error Rate (BER), than Hayashi’s ternary ZCZ sequence sets.
Highlights
In Code Division Multiple Access (CDMA) systems, the number of spreading sequences determines the number of users and their correlation properties have a significant effect on anti-interference performance of the system [1]
Different types of codes used in communications systems have been studied in order to reduce Multiple Access Interference (MAI) [2] [3]
Spreading sequences with good correlation properties can be used to improve the performance of CDMA systems [3]
Summary
In Code Division Multiple Access (CDMA) systems, the number of spreading sequences determines the number of users and their correlation properties have a significant effect on anti-interference performance of the system [1]. Spreading sequences with good correlation properties can be used to improve the performance of CDMA systems [3]. (2014) Ternary Zero Correlation Zone Sequence Sets for Asynchronous DS-CDMA. Any ternary ZCZ sequences set TZCZ ( L′, M ′, ZC′Z ) could be characterized by the sequence length L′ , the number of sequences M ′ and the zero correlation zone length ZC′Z.
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