Digital Signal Processing (DSP), Digital Filter Applications

We discuss the use of multi-rate FIR filters in radio frequency (RF) transient spectroscopy as well as the implementation challenges these multi-rate filters face when used in this application to reduce the sampling rate (decimation) and raise the sampling rate (interpolation). On a Texas Instruments TMS320-C30 DSP processor, all implementation measurements given here were carried out. We have reported the application of multirate FIR filtering to radio frequency (RF) transient spec­ troscopy, and the implementation issues of these multirate filters for sampling rate reduction (dec­imation), and sampling rate increase (interpolation) in this application. These implementation issues include the transient response of the digital filters and the aliasing noise due to the decima­tion process in the passband and the stopband of the digital decimating filters. All implementation measurements reported here were performed on a Texas Instruments TMS320-C30 DSP chip.

本文探讨了在射频（RF）瞬态光谱学中应用多速率FIR滤波器的技术及其在降低采样率（降采）和提升采样率（插值）这一应用场景中面临的实现挑战。在德州仪器公司的TMS320-C30数字信号处理器（DSP）上，本文对所提供的所有实现测量进行了实验。我们已报道了多速率FIR滤波器在射频（RF）瞬态光谱学中的应用，以及这些多速率滤波器在此应用中降低采样率（降采）和提升采样率（插值）所遇到的实现问题。这些实现问题包括数字滤波器的瞬态响应，以及数字降采滤波器通带和阻带中的混叠噪声。本文所报告的所有实现测量均在德州仪器公司的TMS320-C30 DSP芯片上完成。