A Novel Cooperative Relaying Strategy for Wireless Networks With Signal Quantization

作者：Krishna Ranaji^*; Cumanan Kanapathippillai; Xiong Zhilan; Lambotharan Sangarapillai

来源：IEEE Transactions on Vehicular Technology, 2010, 59(1): 485-489.

DOI：10.1109/TVT.2009.2031117

• Cooperative diversity techniques
• wireless relay networks

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.

• 出版日期2010-1