SAR图像传输误码模拟器设计与实现  

Design and Implementation of Bit Error Emulator for SAR Image Transmission

作　　者：甘宇[1,2] 韩松[1] 许权[1,2] 王保初[1,2] 

机构地区：[1]中国科学院电子学研究所,北京100190 [2]中国科学院研究生院,北京100190

出　　处：《计算机测量与控制》2010年第11期2643-2645,共3页Computer Measurement &Control

摘　　要：针对SAR(Synthetic Aperture Radar)图像传输的需求,设计了一个SAR图像传输误码模拟器;该模拟器基于高斯分布的噪声模型,通过线性同余算法和序列变换得到符合高斯分布的随机数;再利用随机数产生差错图案,并以帧为单位对数据源进行误码插入;还介绍了误码模拟器的软硬件实现,通过误码模拟器的测试和分析证明所产生的误码图像接近实际传输中的高斯噪声模型,传输码率达到2Mb/s,误码率能够在10-3-10-6范围间实现,实时性强,能够满足SAR系统测试的需求,具有较高的工程应用价值。A bit error emulator is designed to transmit SAR（Synthetic Aperture Radar） image.The emulator is on the basis of noise model in wireless transmission.Using linear congruential algorithm and series transformation,uniformly distributed random numbers in accordance with Guassian distribution are generated and random variations are obtained via series transform.Error images are then obtained on the basis of random numbers.Error insertion is implemented,in the unit of frame.In addition,software and hardware implementation are also introduced.The test results and analysis show that error image generated by the emulator approaches closely to the Guassian noise model in actual transmission.The emulator thus has good real-time property and satisfies the measurement requirement of SAR system.It thereby has a high value in engineering application.

关 键 词：误码模拟 SAR 高斯分布 

分 类 号：TN911.25[电子电信—通信与信息系统]