Robust Transmit Beamforming in Cognitive Radio Networks

摘要：

This paper investigates the design of robust transmit beamforming for the secondary user (SU) when it co-exists with the primary user (PU) in a cognitive radio network, and the SU’s transmitter (SU-Tx) is equipped with multiple antennas. It is assumed that the channel knowledge for the link from SU-Tx to PU is partially known only. By formulating the problem as maximizing the transmission power to the desired SU receiver (SU-Rx) as well as limiting the interference to the PU in a robust manner, the optimal transmit beamforming is designed using convex optimization theory. The robust solution is also derived through taking into account the possible mobility of the PU and the error in the channel state information (CSI) for the link from SU-Tx to PU. Simulations are presented to evaluate the effectiveness of the proposed robust transmit beamforming schemes under various propagation conditions.

作者: Wanjun Zhi Ying-Chang Liang Michael Yan Wah Chia

作者单位: Institute for Infocomm Research,A*STAR,Fusionopolis Way,Singapore,138632

会议类型: 国际会议

会议名称: The 11th IEEE International Conference on Communications Systems(第11届电子和电气工程师协会国际通信系统会议)(IEEE ICCS 2008)

会议地点: 广州

会议语种:英文

在线出版日期: 2008-11-19（万方平台首次上网日期，不代表论文的发表时间）