短波OFDM通信系统信号采集器的设计与实现

正交频分复用（OFDM）技术具有频谱利用率高、抗多径能力强、带宽扩展性好等优点，因此其适应了短波通信的发展要求。但是收发两端的信号采样频率差会对通信效果造成不良影响，必须采取措施消除这个频率差。因此设计并实现了基于温补晶振的高稳定度信号采集器。经过试验比较发现该文设计的信号采集器可以消除由于采样频差对通信带来的影响，采集器的交互界面也可以方便快捷地观察通信的进程和效果。

Design and Implementation of Signal Sampling Equipment in the HF OFDM Communication Systems

Orthogonal frequency division multiplexing(OFDM) technique adapts for the development of HF communication,because it has the character of high bandwidth efficiency,high ability of against multipath and high bandwidth spread ability.But the difference of sampling frequency between the transmitter and the receiver will effect the communication performance.So this frequency difference must be avoided.A high steady signal sampling equipment using temperature compensated crystalloid is designed and implemented.Experiments show that this signal sampling equipment can remove the effect of the difference of sampling frequency.The user can observe the communication course and performance expediently through the face of this signal sampling equipment