【摘要】 正交频分复用传输系统,以其可对抗频率选择性衰落,高频谱利用率等优点,得到了广泛的应用。论述了正交频分复用(OFDM)信号非协作接收中的某些关键算法,研究了基于循环前缀的符号同步算法及最大联合似然估计(ML)算法、基于高阶累量的OFDM信号调制样式识别算法,解决了OFDM信号和常规通信信号之间的类间信号识别问题。仿真结果进一步说明了该方法的有效性。更多还原

【Abstract】 Orthogonal Frequency Division Multiplexing (OFDM) is widely used,due to its advantage of high data rates in multipath fading environments.Key algorithms in OFDM non-cooperative reception are studied,such as symbol synchronization based on cyclic prefix,ML algorithm,and blind modulation classification algorithm for OFDM signal based on high-order cumulants.The problem of signal recognition between OFDM signal and general communication signals is solved successfully.Simulations further demonstrate the validity of this scheme.更多还原