载波间干扰 meaning in English
ici inter-carrier interference
inter-carrier interference (ici)
Examples
- Firstly , in wireless environment , receiver has no know the time delay between transmitter and itself . in ofdm system , ofdm data is transmitted as one symbol , so in order for correct demodulation , the correct start of symbol should be got from ofdm system to reduce the effect of isi . secondly , the high frequency utilization in ofdm is based on the orthogonal properties of sub carriers . if frequency offset is generated , the orthogonal properties among sub carriers will lost , that will cause inter carrier interference ( ici ) and high ber of system
Ofdm技术也存在着一些缺陷,首先,在无线环境中传输的ofdm信号对定时要求高,为了减少码间串扰( isi )影响,必须从接收信号中提取出正确的符号起始位;其次, ofdm系统对频率偏移敏感, ofdm技术的高频谱利用率和传输可靠性均以子载波的正交性为基础,如果接收机和发射机之间发生频率偏移,子载波之间就会失去正交性,导致严重的子载波间干扰( ici ) ,降低系统性能。