| 摘要: |
| 针对高速移动正交频分复用系统，提出了迭代消除子载波干扰的
信干比差分计算方法。该方法把前后两次迭代的子载波干扰进行差分运算，差分运算值的加
权作为干扰，每次迭代消除子载波干扰后的信号作为有用信号，实现信干比的计算。
误差分析和仿真数据表明：采用这种方法计算信干比可以有效估算出系统信干比，同时算法
复杂度较低。 |
| 关键词: 正交频分复用 迭代算法 差分计算 子载波干扰 信干比 |
| DOI： |
|
| 基金项目: |
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| Low-complexity differential calculation of SIR for high-mobility OFDM system |
| PENG Zhang-you,ZHANG Xing,LIU Yan-yan |
| (School of Communication and Information Engineering,Shanghai University,Shang
hai 200072,China;Key Laboratory of Specialty Fiber Optics and Optical Access Networks,
Shanghai University,Shanghai 200072，China) |
| Abstract: |
| A differential calculation method of Signal to Interference Ratio(SIR) based on
iterative Inter
carrier Interference(ICI) cancellation is proposed for highmobility orthogonal
frequency division multiplexing(OFDM) system. This method performs differential
calculation of ICI before and after iterations, takes weightings of
differential calculation and signal of each ICI iterative cancellation separatel
y as interference and signal,respectively so as to realize the calculation of SI
R.Error analysis and simulation results show that this method can effectively es
timate SIR and has lowcomplexity. |
| Key words: orthogonal frequency division multiplexing(OFDM) iter
ative algorithm differential calculation inter carrier interference(ICI) sig
nal to interference ratio |
