多天线时变信道下基于卡尔曼滤波跟踪的数字图像通信系统

An image communication system over multi-antenna time varying channels based on Kalman filter tracking

数字图像在时间选择性衰落信道下传输 ,难以获得满意效果 .为得到高质量的传输图像 ,基于多天线通信系统 ,采用卡尔曼滤波跟踪方法对时变信道进行跟踪以获得更高的系统性能 ,并增加信道编码 .仿真结果表明 ,在系统中加入卷积码 ,可获得 5dB以上的编码增益 ;在较高信噪比下 ,与无跟踪情况比较 ,误比特率有较大改善并可获得满意的传输图像 .

The received image is not satisfactory over time-selective fading channel. An image communication system over the time varying channels with Kalman filter tracking method is proposed in this paper, based on multi-antenna and the channel coding for good performance. The simulation results show that the coding gain of the system with convolution coding can be improved about 5dB, and the proposed scheme improves the performance of the bit error rate (BER) of the system at the higher signal to noise ratios (SNR) compared to the case of no channel coding and no tracking. The received image is also satisfying.