Algorithm for real number space quasi-zero correlation zone sequences based on evolution strategy
Jianhua Lü · Journal of Tsinghua University(Science and Technology) · 2009
A real number quasi-zero correlation zone(QZCZ) sequence is presented in this paper.The sequence exactly eliminates the inter-symbol interference (ISI) and multi-access interference(MAI) in CDMA systems with channel time delays and synchronization errors smaller than the length of the zero correlation zones(ZCZ).An algorithm is then presented to search for the real-number QZCZ sequence based on an evolutionary strategy(ES).Unlike traditional algorithms,this method searches for the optimal sequence in the general resolution space.The algorithm has less restriction among the sequences parameters due to the algorithm design,such as the sequence period and the ZCZ length,so it is more easily applied to practical applications.