基于VPX架构和第四代Sharc DSP的SAR信号处理系统  

SAR Signal Processing System Based on VPX and Generation-IV Sharc DSP

作　　者：宋玉霞[1] 甘峰[1] 陈娟[1] 

机构地区：[1]中国西南电子技术研究所,成都610036

出　　处：《电讯技术》2012年第6期898-901,共4页Telecommunication Engineering

摘　　要：给出了一种基于VPX架构和ADSP-21469的合成孔径雷达(SAR)实时信号处理机的设计与实现。处理机分别采用基于FPGA的交换机和各Lane接收缓冲再同步技术解决板内外数据交换和多Lane Serial RapidI/O同步难点,实现了实时宽带雷达回波中频采样变换和SAR成像处理。测试表明,该信号处理机比相同处理能力的传统处理机至少减少40W功耗,并具有高达1 Gbyte/s的I/O吞吐力。The design and realization of a real - time SAR（ Synthetic Aperture Radar） signal processing system based on VPX and ADSP - 21469 is given. Data transfer inside the system is resolved by switch built in FPGA and the synchronization of multi-lane Serial RapidI/O is resolved by synchronization after each lane receives and caches data. The real time orthogonal transformation and SAR processing for wide - band IF signal returned to radar is realized. Tests show that the power consumption of the system is decreased by 40W compared with tradi- tional signal processing system, further more, the system attains 1Gbyte/s I/O throughput rate.

关 键 词：合成孔径雷达 信号处理 中频采样 数字正交变换 功耗 

分 类 号：TN957[电子电信—信号与信息处理] TN911.7[电子电信—信息与通信工程]