Finding sub-optimum signature matrices for overloaded code division multiple access systems - Khoozani, Mohsen Heidari; Marvasti, Farokh; Azghani, Masoumeh; Ghassemian, Mona (IET communications, 2013)
Keywords: binary inputs; bit error rate; channel capacity; Code division multiple access; computational complexity; conjugate gradient method; Criteria; Design engineering; distance criteria; Enlargement; error statistics; Expansion; genetic algorithm; gradient methods; Mathematical analysis; matrix algebra; matrix dimensions; objective functions; Optimization; overloaded CDMA system; overloaded code division multiple access systems; particle swarm optimisation; signature matrix optimisation techniques; Signatures; small‐scale signature matrices; suboptimum signature matrices; sum channel capacity; distance criteria; particle swarm optimisation; suboptimum signature matrices; channel capacity; objective functions; code division multiple access; overloaded code division multiple access systems; bit error rate; matrix algebra; small-scale signature matrices; genetic algorithm; binary inputs; sum channel capacity; matrix dimensions; overloaded CDMA system; conjugate gradient method; gradient methods; computational complexity; error statistics; signature matrix optimisation techniques