| 摘要: |
| To suppress the intercarrier interference(ICI) in multiplesymbol dif
ferential detection(MSDD) orthogonal frequency division multiplexing(OFDM) sys
tems, statistical effects of ICI are analysed and then considered in the maximum
likelihood sequence estimation(MLSE) process. Afterwards, a method, which can
estimate and suppress the ICI by utilizing the knowledge of all the subcarriers
in the MLSE process, is proposed. To reduce the computational complexity, severa
l suboptimal ICI suppression methods, which utilize the knowledge of part of the
subcarriers, are further proposed. Simulation results show that the proposed su
boptimal methods can significantly enhance the bit error rate(BER) performances
in both flat and frequency selective Rayleigh fading channels. |
| 关键词: 为抑制多符号差分检测（MSDD） OFDM系统中的载波间干扰（ICI），分析了载波间干
扰的统计性影响，并在最大似然序列估计过程中考虑了这些影响。提出了通过在最大似然序
列估计过程中利用全部子载波信号的信息估计并抑制载波间干扰的方法。为降低计算复杂
度，进一步提出了几种利用部分子载波信号信息的次优载波间干扰抑制法。仿真结果表明：
所提出的次优方法在平坦及频率选择性瑞利信道中均可显著提高误码率性能。 |
| DOI： |
|
| 基金项目: |
|
| ICI suppression methods based on maximum likelihood sequence estimation for MSDD OFDM systems |
| JIA Zi-yan,HANDA Shiro |
| () |
| Abstract: |
| OFDM;
intercarrier interference suppression;multiplesymbol differential detecti
on;maximum likelihood sequence estimation |
| Key words: OFDM 载波间干扰抑制 多符号差分检测 最大似然序列估计 |
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