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文章在主要分析了室内衰落信道模型及TH-PPM(跳时脉冲位置调制)UWB系统模型的基础上,提出了一种用于在已知室内衰落信道的情况下提高UWB图像传输系统通信性能的方法,即将发送图像数据分为主要数据和次要数据,在信道良好的情况下,传输主要数据;在信道较差的情况下,传输次要数据。在不损害传输速率的情况下提高UWB图像传输系统的通信性能。系统仿真的结果显示,在SNR为5dB时,选择传输的接收图像的PSNR比未做选择传输的接收图像改进约7dB。
Based on the analysis of the indoor fading channel model and the TH-PPM (hop-time pulse position modulation) UWB system model, this paper proposes a method for improving the communication performance of the UWB image transmission system with known indoor fading channels Method, the image data to be sent is divided into primary data and secondary data, transmitting the primary data when the channel is good, and transmitting the secondary data when the channel is poor. Improve the communication performance of UWB image transmission system without damaging the transmission rate. The results of the system simulation show that the PSNR of the received image selected for transmission is improved by about 7 dB over the received image of the non-selected transmission when the SNR is 5 dB.