A precoding scheme based on the interference minimization is proposed for an interference-limited communication system such as multiple-input multiple-output (MIMO)-based cognitive (CR) networks. The proposed precoder is to maximize the sum capacity through the minimization of interference power. By selecting a channel with the minimum singular value of the interference channel, the transmitter with the proposed precoder sends the information signals through the channel which produces the minimum interference in the system. Simulation results show that the proposed precoding scheme has the best performance in terms of the sum capacity in a MIMO-based CR network.
Bibliographical noteFunding Information:
Manuscript received April 10, 2011. The associate editor coordinating the review of this letter and approving it for publication was O. Dobre. The authors are with the School of Electrical and Electronic Engineering, Yonsei University, Seoul 120-749, Korea (e-mail: firstname.lastname@example.org). This work was supported in part by the National Research Foundation of Korea Grant funded by the Korean Government(MEST) (No. 2011-0005729) and the Seoul R&BD Program (WR080951). Digital Object Identifier 10.1109/LCOMM.2011.11.110774
All Science Journal Classification (ASJC) codes
- Modelling and Simulation
- Computer Science Applications
- Electrical and Electronic Engineering