Stolt 插值在多核多 DSP 上并行实现

摘要

With the development of SAR imaging towards high resolution and wide swath,ωK algorithm is applied more and more widely.Stolt interpolation is the core of ωK algorithm,which requires the large amount of computations and high calculation precision.The traditional DSP is difficult to meet the demand. Multi-core and multi-DSP parallel processing is an important development trend.This paper introduces a kind of 4 pieces of TMS320C6678 general signal processing platform,which has built-in 8 cores,strong fixed-point and floating-point processing ability.As a case study of stolt interpolation,the multi-core and multi-DSP parallel implementation is discussed.Using the DMA CHAIN technology to implement the data access reduces the data access time effectively and improves the real-time performance of the system.%随着 SAR 成像向高分辨率、大测绘带发展，ωK 算法应用越来越广。Stolt 插值作为ωK 算法核心，运算量大同时对计算精度要求高，传统的 DSP 已很难满足实时处理要求，多核多 DSP 并行处理是一个重要发展趋势。介绍了一种基于 TMS320C6678通用信号处理平台，该处理器内置8核，定点、浮点处理能力强，并以此平台论述了 Stolt 插值多核多 DSP 并行实现。程序同时采用了 DMA CHAIN 技术来实现数据存取，降低了数据存取时间，有效地提高了系统实时性。