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Particle swarm optimization algorithm (PSO) has showed great advantage in solving multidimensional and non-linear problems, and it is easy to be applied. By improving binary particle swarm optimization (BPSO) algorithm and applying it in direct sequence code-division multiple-access (DS-CDMA) system as a multiuser detection algorithm, a BPSO multiuser detection (BPSO-MUD) is proposed in this paper...
This paper designs a novel multiple input and multiple output (MIMO) digital modulation technique called multi-carrier code division multiple access (MC-CDMA) in which data symbols are transmitted at multiple subcarriers. The system model and analytical results will be presented in the downlink of the wireless networking. In addition, a simplified implementation of the system by using sparse matrix...
This paper proposes a FIR-RAKE receiver algorithm that makes use of a pilot signal broadcast by the TD-SCDMA (time division-synchronous code division multiple access) base station to obtain channel parameter estimates in the downlink of TD-SCDMA wireless network. The algorithm can reduce multipath interference for the mobile units and with lower complexity of FIR implementation, where only one marching...
According to MIMO idea, the CDMA systems with MIMO technique can increase system capacity, each mobile station in a cell can get at least two spatial communication channels if it equip more than two antennas. The idea is based on the assumption of the MIMO channels of base station (BS) to mobile stations (MSs) to be fully non-coherent, which means that the row vectors of MIMO channels' matrix should...
We instigate a novel multiple input and multiple output (MIMO) digital modulation technique called multi-carrier code division multiple access (MC-CDMA) in which data symbols are transmitted at multiple subcarriers for wireless multimedia communications. The system model and analytical results will be presented on the performance of this modulation scheme in the downlink of the wireless networking...
The complex valued orthogonal variable spreading codes are presented for multiplexing of forward link in direct sequence code division multiple access (DS-CDMA) system for variable rates multimedia communications. The bit error rate (BER) performance under a multi-user environment suffering the additive white Gaussian noise (AWGN) channel and correlations of those codes are evaluated. The results...
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