Construction and assignment of orthogonal sequences and zero correlation zone sequences for applications in CDMA systems

Xie, Chunlei; Sun, Yongrong

doi:10.3934/amc.2020001

Cited by 2 publications

(1 citation statement)

References 12 publications

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“…In Table 3, we compare the main parameters of ZCZ sequence. Comparison with the literature [12] and [23]. A class of p-phase ZCZ sequence sets is constructed, which the length of sequence is 3 m+1 •N +2N −2 in Theorem 3.…”

Section: A Family Of Orthogonal Sequences With Zczmentioning

confidence: 99%

Construction and Assignment of Orthogonal Sequences and Zero Correlation Zone Sequences Over GF(p)

Xie¹,

Wang

Zhang

2022

IEEE Access

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Orthogonal sequences can be assigned to a regular tessellation of hexagonal cells, typical for synchronised code-division multiple-access (S-CDMA) systems. The sequences within any cell should both be orthogonal in the adjacent cells and require a sufficient number of users in each cell. However, for binary sequences, the capacity of communication system is limited. So, a new family of non-binary orthogonal sequences is constructed, which has more sequences per cell than binary sequences in the network. Next, an efficient assignment of these orthogonal sequence sets to a regular tessellation of hexagonal cells is given, and also the sequence sets have large re-use distance. Finally, based on above the construction, we construct a family of orthogonal sequences with zero correlation zone (ZCZ) property which can reduce the interference among users in a multi-path environment. The constructed ZCZ sequences can be applied to the quasi-synchronous CDMA (QS-CMDA) spread spectrum systems. And the assignment of sequences has the same re-use distance.INDEX TERMS Orthogonal sequences, zero correlation zone, boolean functions, semi-bent functions.

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Section: A Family Of Orthogonal Sequences With Zczmentioning

confidence: 99%

Construction and Assignment of Orthogonal Sequences and Zero Correlation Zone Sequences Over GF(p)

Xie¹,

Wang

Zhang

2022

IEEE Access

Self Cite

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Integrated visible light communication and positioning CDMA system employing modified ZCZ and Walsh code

Chen¹,

Fan²,

Wang³

et al. 2022

Opt. Express

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In this paper, an integrated visible light communication and positioning (VLCP) code division multiple access (CDMA) system is proposed for recovering original user data and obtaining positioning information simultaneously. A generalized modification method for balanced bipolar code set is presented, which can be applied to VLCP-CDMA system with intensity modulation. Both modified bipolar code sets, zero correlation zone (ZCZ) code set and Walsh code set, are employed and evaluated in VLCP-CDMA systems. When considering synchronous and quasi-synchronous (QS) systems, it is demonstrated that the modified ZCZ code set with ideal zero correlation zone properties performs better communication and positioning performance than the modified Walsh code set by system simulations and experiments. As a result, a bit error rate (BER) of 1.8×10−3 and an average positioning error of 1.50 cm are successfully obtained by adopting modified ZCZ code set in a 4-user real-time VLCP-CDMA system. It will offer a promising solution to meet both communication and positioning requirements of future intelligent systems.

show abstract

Construction and assignment of orthogonal sequences and zero correlation zone sequences for applications in CDMA systems

Cited by 2 publications

References 12 publications

Construction and Assignment of Orthogonal Sequences and Zero Correlation Zone Sequences Over GF(p)

Construction and Assignment of Orthogonal Sequences and Zero Correlation Zone Sequences Over GF(p)

Integrated visible light communication and positioning CDMA system employing modified ZCZ and Walsh code

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