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The physical-layer network coding (PNC) is very attractive, since it takes full advantages of interference signals at the relay node, therefore improves the channel capacity significantly. However, the flat fading channel would destroy the sum signal received at relay node, leading to detection error and capacity damage. In this paper, a pre-coding scheme for the multi-user PNC (MU PNC) is proposed,...
Location estimation using received signal strength (RSS) in pervasively available Wi-Fi infrastructures has been considered as a popular indoor positioning solution. However, accuracy deterioration due to uncertainty of RSS and offline manual calibration cost limit the deployment of Wi-Fi positioning systems. This paper proposes a signal perturbation technique to enhance existing support vector regression...
Indoor positioning in wireless local area network (WLAN) has been attracting increasing attentions for its cost effectiveness and reasonable positioning accuracy. Existing positioning methods all pay attention to establish more accurate relationship between received signal strength (RSS) and physical locations. However, the deployment of access points (APs) is ignored. This paper proposes an optimized...
This paper proposes the optimal K nearest neighbors (KNN) positioning algorithm via theoretical accuracy criterion (TAC) in wireless LAN (WLAN) indoor environment. As far as we know, although the KNN algorithm is widely utilized as one of the typical distance dependent positioning algorithms, the optimal selection of neighboring reference points (RPs) involved in KNN has not been significantly analyzed...
This paper considers the cooperative schemes where the source, relay and the destination are all multi-antenna terminals. Zero-forcing equalization and maximum ratio combining technique are employed in this scheme. We extend the classical selection relaying into the multi-antenna setup. Based on a predefined threshold, the source decides to cooperate only when it needs help. The source picks only...
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