A Precoder for Reducing Downlink Interference from Femtocells to Macro Users Based on Cognitive Radio
This paper proposes a preprocessor for femtocell base stations to avoid the downlink interference to the macro users, where both systems are multicarrier systems. By using the concept of cognitive radio, we design a low complexity transmitter including a precoder followed by a power allocation. With the judicious design of the interference tolerant constraints, the performance degradation of the macro user is controlled to be less than a predetermined value. Simulation results show that the spectrum efficiency of the femtocell system with the presented transmitter is improved significantly.
precoding femtocell interference cognitive radio
Xueying Hou Wei Ling Zhikun Xu Chenyang Yang
School of Electronics and Information Engineering, Beihang University, Beijing, P.R.China
国际会议
2010 IEEE 10th International Conference on Signal Processing(第十届信号处理国际会议 ICSP 2010)
北京
英文
1663-1666
2010-08-24(万方平台首次上网日期,不代表论文的发表时间)