高速／变速跳频同步技术

跳频通信具有很强的抗干扰、抗衰落、抗截获能力。跳频速率、跳频带宽和跳频频点数是跳频通信主要的性能参数，而跳频同步则是跳频通信的关键技术。为了提高抗干扰能力，必须采用较高的跳频速率，采用可靠快速的跳频同步方法。以DSP＋DDS为支撑的宽带高速／变速跳频系统的跳频器可输出直接射频调制信号。基于相关码联合差错控制的快速跳频同步方法，有较短的初始同步时间及迟入网进入时间，具有较强的抗噪声干扰性能。

Technique of High/Variable Speed Frequency Hopping Synchronization

Frequency hopping communication has higher capabilities of anti-interference, anti-fading and anti-intercept. FH speed, FH bandwidth and FH frequency point number are the primary performance parameters, and FH synchronization is the key technique of FH communication. In order to improve anti-interference capability, high speed FH and reliable-fast FH synchronization method must be adopted. With support of DSP＋DDS, high and variable speed FH system with wide bandwidth can output direct radio frequency modulated signal. Fast FH synchronization method, based on correlation code joint error control, has short initial synchronization time and delay on net time, so this method has higher anti-noise interference performance.