摘要
主要研究了第三代短波通信系统链路自动建立协议(Automatic Link Establishment,ALE)中的信道监测协议,针对其不足提出了一种针对数据传输的特定结构进行监测的方法。在同步模式下,3G-ALE系统监测信道占用情况,现在应用最普遍的是对8PSK信号进行检测。这种监听方式在信噪比很低的情况下,监听不可靠。针对上诉问题,提出了一种利用短波串行调制下数据传输的特定结构进行相关检测的方法,仿真证明即使在低信噪比的情况下也有很好的检测结果。
The paper study the channel detection protocol of the third generation automatic link establishment（3G-ALE）,to improve the deficiency of fallible detection,a new protocol of channel detection was proposed.At the synchronous model,the 8psk method have been popular used to find if the channel is idle in 3G-ALE.With low SNRs （signal-to-noise-ratio）,the outcome of this 8psk method is unbelievable, and it will result in the collision in trafficchannel after the automatic liink establishment.To solve the above problem,we propose an algorithm of channel detection based on the special data frame,Simulation results show it has a more better outcome of channel detection to the 8psk method even with low SNRs.
出处
《电子质量》
2011年第11期12-15,共4页
Electronics Quality
