高速并行数字重采样控制算法研究
Research on High Speed Parallel Digital Resampling Control Algorithm
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摘要: 针对高速宽带中频系统对并行数字重采样的应用需求, 研究了一种并行NCO溢出机制控制算法, 它基于对符号位判决的原理, 可快捷地提供准确插值位置及溢出使能控制.基于该并行控制算法, 借助经典的插值滤波器方法, 还设计并实现了一种适合高速系统应用的并行数字重采样结构, 仿真分析表明了并行NCO控制算法所具有的良好性能, 通用数字逻辑硬件的应用测试也证明了该算法良好的移植性能.Abstract: This paper proposes a unique algorithm to control the parallel NCO overflow mechanism, which is applied to the digital parallel resampling module in the high-rate broadband system. It can issue the accurate interpolation position and overflow enable in a parallel NCO of the digital resampling module from a simple rule: Judge from sign. Consequently, a parallel digital resampling module based on algorithm above is implemented on the typical construct of interpolation filter. Simulation results show that the parallel NCO control algorithm executes a fine interpolation performance, and a hardware application on a general logic platform shows its high portability and flexibility.