OFDM信号码片时宽与符号长度估计

OFDM技术以其可对抗频率选择性衰落、高频谱利用率等优点,日益广泛应用于军用和民用领域,同时也给信号侦察、频谱管制带来了一定的挑战。在研究OFDM信号循环谱特性的基础上,基于循环相关的方法对其码片时宽和符号长度进行参数估计,通过实验仿真验证了估计算法的有效性和实际应用的可行性,可在数字侦察处理硬件平台予以实现,为以第三方的身份对OFDM通信信号进行侦察接收提供算法支持,有广泛的应用价值。

Estimation on Chip Width and Symbol Length of OFDM Signal

For resistance of frequency selective fading and high spectrum utilization rate,OFDM is widely applied in both military and civil fields,while it also produces challenges for signal reconnaissance and spectrum control.On the basis of analyzing the cyclic spectrum feature of OFDM,a method is presented for +estimating chip width and symbol length by using cyclic correlation.Experiment proves that the estimation algorithm is effective and feasible in practical application,and it can be implemented on digital r...