摘要
针对频偏引起的正交频分复用(OFDM)系统中载波间干扰(ICI)的问题,为消除间干扰,提出了一种基于SSC-ASIZ方案的子载波间干扰抑制算法。为了更好地在接收端消除子载波干扰,发送端通过相邻子信道插零(ASIZ)算法对子载波进行分配;在接收端,针对发送端的特殊载波结构,通过接收符号移位抵消(SSC)算法来抑制对子载波的干扰。仿真结果表明,使用方案后系统信号干扰功率比(SIR)性能比常规系统提高了至少15dB,误码率(BER)性能也比其它方案优越,明显地改善了系统的性能。
For intercarrier interference （ICI） due to frequency offsets in OFDM systems, an ICI suppression al- gorithm based on SSC - ASIZ scheme is proposed for combating the impact of ICI in this paper. In order to eliminate the intercarrier interference effectively, the subchannel inserting zero （ASIZ） algorithm is used at the transmitter to distribute the subcarrier. At the receiver side, aiming at transmitter＇s special subcarrier structure, the received symbol shift cancellation （SSC） algorithm is used to suppress the intercarrier interferences. Simulation results show that the ICI contained in the received signals can be effectively reduced by using the SSC - ASIZ scheme, the Signal - to -Interference power Ratio （SIR） and Bit Error Rate （BER） are both much better than that of the regular scheme which improves system＇s performance obviously.
出处
《计算机仿真》
CSCD
北大核心
2010年第2期157-161,共5页
Computer Simulation
