A Pre-estimated Resource Allocation Algoritbm Based on Cognitive OFDM for Multi-user
Multi-user cognitive orthogonal frequency division multiplexing (C-OFDM) is an extremely promising technique for achieving high transmission capacity in the next generation cellular and wireless local area network (WLAN) systems with limited spectrum resources. And a proportional fairness sub carriers allocation algorithm based on the margin adaptive (MA) principle is used to meet the rate fairness between users. This paper presents a new bit and power allocation scheme for C-OFDM systems based on the margin adaptive (MA) principle in which the overall transmission power is minimized by constraining the fixed data rate and bit error rate. Simulation results show that the proposed algorithm is superior to the traditional algorithm, while reducing the computational complexity from exponential to Jinear in the number of sub-carriers.
Cognitive OFDM Bit aLlocvuion Margin Adaptive Ratefairness Computational complexity
Dawei Sun Baoyu Zheng
Institute of Signal Processing and Transmission Nanjing University of Posts and Telecommunications Nanjing, P.R.China
国际会议
2010 2nd International Conference on Signal Processing System(2010年信号处理系统国际会议 ICSPS 2010)
大连
英文
346-349
2010-07-05（万方平台首次上网日期，不代表论文的发表时间）