A Novel Group Frequency-Hopping Scheme for OFDM Modulated Multiuser System
This paper devises a novel group frequencyhopping (FH) scheme for OFDM modulated multiuser system, in order to optimize the resource reuse efficiency and resolve the performance degradation due to the deep fading in the same time. In the OFDM modulated multiuser system, the traditional FH schemes can work in a multipath fading environment and achieve a moderate bit-error-rate (BER). However, when the deep fading subcarriers exist, the traditional schemes present poor performance, because the deep fading subcarriers become dominant factor in determining the overall BER performance. To solve this problem, this paper proposes a novel group FH scheme. The scheme reorganizes the frequency domain sequences of the deep fading subcarriers and then forms them into a short-OFDM frame, which is allocated dynamically and adaptively to the subcarreirs of idle users to transmit. Computer simulation results show the superiority of the proposed scheme over the traditional schemes in the BER performance.
Lisheng Fan Jing Li Yuanmo Lin Xianfu Lei Feifei Gao Yongquan Jiang
Educational Commission of Guangdong Province,China and the Youth Foundation of Shantou University
国际会议
哈尔滨
英文
1181-1184
2010-01-08（万方平台首次上网日期，不代表论文的发表时间）