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A Novel Cooperative Relaying Strategy for Wireless Networks With Signal Quantization

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4 Author(s)
Krishna, R. ; Loughborough Univ., Loughborough, UK ; Cumanan, K. ; Zhilan Xiong ; Lambotharan, S.

We propose a cooperative signal-forwarding scheme for wireless sensor and mesh networks using semidefinite constraints. We consider a multiple source-destination scenario where a set of relays assists forwarding signals from sources to destinations. This paper assumes cooperation between relays so that the signals received from source nodes are passed between the relays. A semidefinite programming framework allows us to impose various quality-of-service (QoS) constraints for each source-destination pair. The proposed scheme outperforms a cooperative relaying strategy that is based on a minimum mean square error (MMSE). The design also considers quantization of signals that are passed between cooperating relays. The proposed scheme, even in the presence of signal-quantization noise, outperforms a noncooperative relaying scheme.

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Vehicular Technology, IEEE Transactions on  (Volume:59 ,  Issue: 1 )