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—A joint channel estimation and multiuser detection (JCEMUD) scheme is proposed for multiuser multiple-input–multiple-output (MIMO) space-division multiple-access/ orthogonal frequency-division-multiplexing (SDMA/OFDM) systems. We design a dual repeated weighted boosting search (DRWBS) scheme for JCEMUD, which is capable of providing " soft " outputs, which(More)
—A differential evolution (DE) algorithm aided iterative channel estimation and turbo multiuser detection (MUD) scheme is proposed for multiuser multi-input multiple-output aided orthogonal frequency-division multiplexing / space-division multiple-access (OFDM/SDMA) systems. The proposed scheme iteratively exchanges the estimated channel information and the(More)
—A joint channel impulse response (CIR) and noise-variance estimation scheme is proposed for multiuser multiple-input–multiple-output (MIMO) orthogonal frequency-division multiplexing/space-division multiple access (OFDM/ SDMA) systems, which is based on the expectation-conditional maximization (ECM) algorithm. Multiple users communicating over fading(More)
—Sensor's position is extremely crucial for the configuration and applications of wireless sensor network (WSN). In this paper, a novel range-free and distributed localization (THCRL) algorithm was proposed for WSN based on the two-hop connection relationship of a node. In THCRL algorithm, the information of one-hop and two-hop anchor nodes is firstly(More)
—The development of evolutionary algorithms (EAs), such as genetic algorithms (GAs), repeated weighted boosting search (RWBS), particle swarm optimization (PSO), and differential evolution algorithms (DEAs), have stimulated wide interests in the communication research community. However, the quantitative performance-versus-complexity comparison of GA, RWBS,(More)
Cognitive radios such as intelligent phones and Bluetooth devices have been considered essential goods in next-generation communication systems. Such devices will have to share the same frequency band owing to the limited bandwidth resource. To improve spectrum efficiency, we formulate multi-channel power allocation as a market competitive equilibrium (CE)(More)