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Performance of future wireless communication systems being interference limited, researchers are focusing on interference alignment, interference mitigation and interference suppression to diminish, manage or exploit these interferers. In this paper, we carry out the performance analysis of the recently proposed low complexity max log MAP detector and linear MMSE detector for interference suppression...
A maximum-likelihood sequence detector with no explicit extraction of channel state information (MLSD-NCSI) for diversity reception of quadrature-amplitude-modulated (QAM) signals over a flat fading channel is derived. Its performance improves with the sequence length L, but the computational complexity also increases with L. To implement MLSD-NCSI with a practical complexity for an increasing L,...
We propose a new algorithm for noncoherent sequence detection of M-ary phase-shift-keying (M-PSK) symbols transmitted over a block fading channel. The algorithm is of complexity O(T), where T is the sequence length, and is therefore computationally superior to existing maximum-likelihood (ML) detectors of complexity O(T logT). Our detector is based on a new approximation we propose to the noncoherent...
In this paper, we propose a near-optimal, reduced-complexity turbo multiuser receiver for space-time block-coded multi-carrier code division multiple access (MC-CDMA) uplink systems over frequency selective fading environments based on particle swarm optimization (PSO) algorithm. The soft-input soft-output (SISO) multiuser detector based on a posteriori probability (APP) algorithm can achieve optimal...
In this paper, we present multiuser detection (MUD) technique based on a hybrid immune clonal selection algorithm (ICSA) with Hopfield neural network (HNN), for multi-carrier code division multiple access (MC-CDMA) communications systems. The ICSA is an effective approach for the issue of multiuser detection, however, it needs relative high iterated time to convergence. The performances of the ICSA...
This paper investigates detection mechanisms for time hopping pulse position modulated (TH-PPM) multiple access systems in both additive white Gaussian noise and fading environments. In such systems, the raw data is not linearly related to the received signal. One technique is to express the pulse position modulated signal as the sum of linearly modulated signals with the input being a nonlinear function...
In this paper, a novel approach using frame-based iterative channel fading parameters estimation technique from the received data sequence exploiting orthogonal property of the space-time block (STB) code is proposed. For practical implementation of STB code, the receiver requires to estimate these parameters. Regarding this type of estimation, the inherent orthogonal nature of STB code can be exploited...
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