Frequency sampling digital filters for multirate applications and pipelined implementations
Sivaramakrishnan Ramaswamy · Digital Scholarship - UNLV (University of Nevada Reno) · 2019
Under certain circumstances, narrowband linear phase filters can be implemented more efficiently using frequency sampling filters than direct convolution filters. The desired frequency response of a frequency sampling filter is approximated by interpolating a frequency response through a set of frequency samples. The implementation of a frequency sampling filter contains unit delays in its feedback paths. Therefore, it cannot be pipelined or efficiently used in multirate applications. In this thesis, a frequency sampling filter that has only delays of length D in it feedback paths is developed. The new frequency sampling filter can be pipelined and efficiently used in multirate applications.