Ternary Zero Correlation Zone Sequence Sets for Asynchronous DS-CDMA

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.

Sequences with Perfect Periodic Auto and Cross Correlation Properties

“…(i) perfect periodic synthesized binary sequences with variable amplitude and higher energy efficiency are designed to achieve zero sidelobes in zero correlation zone so that even a small target present near the large target can be detected. (ii) to avoid the interference of multiple waveforms in applications such as RSN, MIMO radar or CDMA communications, it is desired to make sidelobes as low as possible [16][17][18][19][20][21][22]. The perfect periodic autocorrelation property of synthesized sequences are shown in Figures 4(b), 5, 7(a) and 7(b).…”

Enhancing confidentiality protection for ZCZ-OCDMA network using line selection and wavelength conversion based on SOA

“…This class of codes is an innovative coding, which ensures ideal autocorrelation and cross-correlation properties within the correlation zone. Various constructions of ZCZ codes such as binary, ternary, polyphase and optical codes have been constructed [7][8][9][10][11][12][13][14][15][16][17].…”