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OFDM无线通信系统中源于单频率偏移的ICI分析 被引量:1

A Simple Formula for ICI Caused by Single Frequency Offset in Wireless OFDM System
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摘要 在每条路径上具有相同的归一化单频率偏移(NSFO)条件下,通过数学技巧推导了由NSFO产生的归一化信道间干扰(ICI)功率(NIP)公式的简单形式.同Moose和Feng界相比,简单公式不仅容易且能精确地计算NIP.仿真确定该式成立条件:|NSFO|≤0.2和Nc≥4,这里Nc是OFDM系统中总的子载波数.最后,将其应用到无线信道,推出由Doppler扩展产生的NIP公式. Normalized interchannel interference ( ICI ) power(NIP) caused by normalized single frequency offset (NSFO) has been derived to be one third of the square of NSFO by mathematical skills under the condition that each path has the same SFO. Compared with Moose's and Feng' s bounds, this simple formula provides both easy and precise calculation for NIP. Simulation indicated that this identity holds when I NSFOI ≤0.2 and No ≤4 where No is the total number of subcarriers. Finally, this simple formula is applied in derving NIP expression resulting from Doppler spread in a wireless channel.
出处 《应用科学学报》 CAS CSCD 北大核心 2006年第6期551-554,共4页 Journal of Applied Sciences
基金 国家自然科学基金(60496311) 东南大学移动通信国家重点实验室开放研究基金资助项目(N200609)
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