New results for probability of error performance in MMSE multiuser detection for CDMA
Digital Signal Processing
On the performance of O3BPSK LDD with diversity combining techniques over fading channels
Computer Communications
Population declining ant colony optimization algorithm and its applications
Expert Systems with Applications: An International Journal
Ant colony optimization algorithm with mutation mechanism and its applications
Expert Systems with Applications: An International Journal
Power control and capacity of spread spectrum wireless networks
Automatica (Journal of IFAC)
International Journal of Communication Systems
Computers and Electrical Engineering
Hybrid local search polynomial-expanded linear multiuser detector for DS/CDMA systems
International Journal of Wireless and Mobile Computing
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Consideration is given to a class of suboptimum detectors for data transmitted asynchronously by K users employing direct-sequence spread-spectrum multiple access (DS/SSMA) on the additive white Gaussian noise (AWGN) channel. The general structure of these detectors consists of a bank of matched filters, a linear transformation that operates on the matched-filter outputs, and a set of threshold devices. The linear transformations are chosen to minimize either a mean-squared-error or a weighted-squared-error performance criterion. Each detector can be implemented using a tapped delay line. The number of computations performed per detected bit is linear in K in each case, and the resulting detectors are thus much simpler than the optimum detector. Under typical operating conditions, these detectors will perform much better than the conventional receiver and often nearly as well as the optimum detector