Large-system-based performance analysis and design of multiuser cooperative networks
IEEE Transactions on Signal Processing
High performance cooperative transmission protocols based on multiuser detection and network coding
IEEE Transactions on Wireless Communications
Max-min relay selection for legacy amplify-and-forward systems with interference
IEEE Transactions on Wireless Communications
IEEE Transactions on Wireless Communications
Wireless network cocast: location-aware cooperative communications with linear network coding
IEEE Transactions on Wireless Communications
ISWCS'09 Proceedings of the 6th international conference on Symposium on Wireless Communication Systems
On multi-user detection in CDMA based cooperative networks
SARNOFF'09 Proceedings of the 32nd international conference on Sarnoff symposium
A modified blind MUD algorithm in the cooperation network
WiCOM'09 Proceedings of the 5th International Conference on Wireless communications, networking and mobile computing
Blind user detection in doubly dispersive DS/CDMA fading channels
IEEE Transactions on Signal Processing
Asymptotic analysis and design of multiuser cooperative DS-CDMA systems
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
Mobile Networks and Applications
Full length article: Neighbor discovery in wireless networks: A multiuser-detection approach
Physical Communication
Full length article: Multi-user cooperation schemes with iterative decoding
Physical Communication
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We investigate strategies for user cooperation in the uplink of a synchronous direct-sequence code-division multiple-access (DS/CDMA) network employing nonorthogonal spreading codes and analyze their performance. We consider two repetition-based relay schemes: decode-and-forward (DAF) and amplify-and-forward (AAF). Focusing on the use of linear multiuser detectors, we first present cooperation strategies, i.e., signal processing at both the relay nodes and the base station (BS), under the assumption of perfectly known channel conditions of all links; then, we consider the more practical scenario where relays and BS have only partial information about the system parameters, which requires blind multiuser detection methods. We provide performance analysis of the proposed detection strategies in terms of the (asymptotic) signal-to-(interference plus noise) ratio and the bit error rate, and we show that AAF achieves a full second-order diversity when a minimum mean-square-error detector is employed at both the relay side and the BS. A simple, yet effective, partner selection algorithm is also presented. Finally, a thorough performance assessment is undertaken to study the impact of the multiple-access interference on the proposed cooperative strategies under different scenarios and system assumptions