摘要
对信道化瞬时测频接收机接收线性调频信号的处理增益、跨信道合并和参数测量等问题进行了讨论。首先,处理增益的分析证明信道化接收机仍能有效提高信道化线性调频信号的信噪比;其次,基于调频信号的瞬时频率连续性合并线性调频信号在多个子信道的分裂输出;最后,使用最小二乘方法从瞬时频率序列估计线性调频信号的参数。跨信道合并和参数估计方法都可以在实时计算场合应用,仿真结果显示了其在大于-5 dB的输入信噪比下仍然有效。
Processing gain, cross channel combination and parameter estimation of LFM signal in channelized receiver are consid- ered. First, processing gain analysis shows that high SNR improvement can be achieved. Second, based on continuity of instanta- neous frequency series, a combination method of cross channel outputs of LFM signal is proposed. Lastly, least square method is used to estimate parameters from instantaneous frequency series. The combination and estimation methods can be applied to real time situation and the parameter measurement estimation is till accurate even at SNR of -5 dB.
出处
《现代雷达》
CSCD
北大核心
2009年第8期73-76,共4页
Modern Radar
