Designing digital filters
Digital filter design
Digital Signal Processing
Discrete-time signal processing
Discrete-time signal processing
Digital signal processing with the TMS320C25
Digital signal processing with the TMS320C25
Multirate Digital Signal Processing
Multirate Digital Signal Processing
Digital Filters and Signal Processing
Digital Filters and Signal Processing
Introduction to Digital Signal Processing
Introduction to Digital Signal Processing
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A nine-octave multirate filter with one-third-octave band gain control is presented. The filter, developed as a DSP (digital signal processing) application, produces a random-noise spectrum from 10 Hz to 5 kHz with a controllable level in one-third-octave bands. Nine FIR (finite impulse response) bandpass filters processed at different sample rates and eight FIR low-pass interpolation filters provide shaped pseudorandom noise. Equipment includes the TI TMS320C25-based software development system and the TLC32041 analog interface chip. The design offers a significant saving in both data memory storage and processing time. The multirate filter program uses 1368 words of data memory, whereas an equivalent single rate would occupy 41 K words of data memory.