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Linear and nonlinear receiver structures based on Minimum Mean Square Error (MMSE) linear combiner are proposed to mitigate the effect of multiuser interference in uplink Direct Sequence overloaded Code Division Multiple Access (DS-CDMA) system. The proposed mitigation algorithm exploits the inherent multi-path diversity and diminishes the effects of both Inter Symbol Interference (ISI) and Multiuser...
Code synchronization is a critical step for fast and reliable code search in direct-sequence spread-spectrum (DS-SS) system. In this paper, we propose a novel differentially coherent (DC) detection scheme for rapid code acquisition over a fast Rayleigh fading mobile radio channel with frequency offset, and compare the performance with the conventional I-Q noncoherent detection scheme. Numerical results...
Multiuser detection is an important technology in wireless CDMA systems for improving both data rate as well as user capacity. However, the computational complexity of multiuser detection prevents the widespread use of this technique. Most of the CDMA systems today and in the near future will continue to use the conventional matched filter with its comparatively low user capacity and a slow data rate...
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