一种散射通信信噪比估计算法的仿真与实现

信噪比是通信系统中的一个重要的通信参数,一方面利用信噪比可衡量信道质量,另一方面在无线通信尤其是认知无线电领域多个参数需根据信噪比进行自适应调整。利用通信信号形式的频谱特点提出一种结合信号频谱的信噪比估计算法,首先对算法性能进行了计算机仿真,然后利用可编程器件对算法进行了硬件实现以及性能测试,测试表明该算法具有估计动态范围宽、测试精度高等特点,另外该算法与通信系统误码性能、信道类型无关,在恒参信道、变参信道中均具有良好的估计性能。

Design and Simulation of an SNR Algorithm of Troposcatter Communication

The SNR （Signal Noise Ratio） is an important parameter in the communication system. On the one hand, SNR can indicate the quality of the channel, on the other hand, in the wireless communication system especially in the cognitive radio system, multiple parameters should be performed adaptive adjustment according to the SNR. The paper utilizes the spectrum of the communication signal to propose a SNR estimation algorithm combining the spectrum of the signal. Firstly, the paper makes a computer simulation with performance of this algorithm, and then makes the hardware implementation and performance testing of this algorithm using programmable device. The test result shows that this algorithm has many advantages, such as broad estimate dynamic range and high testing precision. In addition, it is independent of BER performance of communication system and the type of channel. It has a good estimate performance both at constant channel and variable channel.