基于SAW色散延迟线的Chirp_UWB接收机设计

Design of Chirp UWB Receiver Based on SAW Dispersive Delay Line

利用线性调频(Chirp)信号的脉冲压缩特性,设计并实现了一种Chirp_UWB通信系统的接收机电路。该电路首先使用两块正负斜率的声表面波色散延迟线(SAWDDL)分别对两路相同的Chirp_UWB信号进行匹配压缩,再通过包络检波、整形、A/D采样及数字处理等模块恢复原始码元。实验表明该接收机具有系统可靠性高,硬件电路调试简单及适合产品的批量生产等特点。

A novel receiver circuit for Chirp UWB communication system has been designed and realized by utilizing the pulse compression characteristics of linear frequency modulation （Chirp） signals in this paper. First of all, two identical Chirp UWB signals are compressed with two SAW dispersive delay lines （SAWDDL） with different slopes. Then the original symbols are recovered by envelope detector, shaping, A/D sampling as well as the digital processing modules. It can be seen from the simulation results that the receiver has obviously high reliability. In addition, the hardware circuit can simply perform debugging and therefore it enables the production to be promoted with larger volume.