Open AccessAdequate spreading codes to reduce MAI in quasi‐synchronous MC‐DS‐CDMA system
Author(s) -
Addad Mouad,
Djebbari Ali
Publication year - 2020
Publication title -
iet communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.355
H-Index - 62
eISSN - 1751-8636
pISSN - 1751-8628
DOI - 10.1049/iet-com.2019.1075
Subject(s) - code division multiple access , additive white gaussian noise , algorithm , computer science , synchronous cdma , code (set theory) , bit error rate , interference (communication) , mathematics , channel (broadcasting) , telecommunications , set (abstract data type) , multiuser detection , programming language
In this study, the authors consider the effect of multiple access interference (MAI) on the performance of a quasi‐synchronous multicarrier direct‐sequence code‐division multiple access (QS‐MC‐DS‐CDMA) system. An analytical expression of the bit error rate (BER) is derived for a QS‐MC‐DS‐CDMA system over additive white Gaussian noise channel. The BER performance degradation is proportional to the squares of the even correlation function (ECF) and odd correlation function (OCF) of the spreading codes. The obtained results show that the adequate spreading code is a set of binary zero correlation zone sequences with both zero ECF and OCF. The construction of the latter codes remains a challenge for researchers in the field of code design.