Low complexity bit loading algorithm for OFDM system  

作　　者：Yang Yu Sha Xuejun Zhang Zhonghua 

机构地区：[1]National Key Laboratory of Tunable Laser Technology, Harbin Inst. of Technology, Harbin 150001, P. R. China [2]Communication Research Center, Harbin Inst. of Technology, Harbin 150001, P. R. China

出　　处：《Journal of Systems Engineering and Electronics》2006年第1期71-74,共4页系统工程与电子技术（英文版）

摘　　要：A new approach to loading for orthogonal frequency division multiplexing （OFDM） system is proposed, this bit-loading algorithm assigns bits to different subchannels in order to minimize the transmit energy. In the algorithm, first most bit are allocated to each subchannels according to channel condition, Shannon formula and QoS require of the user, then the residual bit are allocated to the subchannels bit by bit. In this way the algorithm is efficient while calculation is less complex. This is the first time to load bits with the scale following Shannon formula and the algorithm is of O （4 N） complexity.A new approach to loading for orthogonal frequency division multiplexing （OFDM） system is proposed, this bit-loading algorithm assigns bits to different subchannels in order to minimize the transmit energy. In the algorithm, first most bit are allocated to each subchannels according to channel condition, Shannon formula and QoS require of the user, then the residual bit are allocated to the subchannels bit by bit. In this way the algorithm is efficient while calculation is less complex. This is the first time to load bits with the scale following Shannon formula and the algorithm is of O （4 N） complexity.

关 键 词：OFDM bit loading Shannon formula QOS 

分 类 号：TN92[电子电信—通信与信息系统]