Digital receivers and transmitters using polyphase filter banks for wireless communications

Digital Signal Processing

“…It is also helpful in spectroscopic observations of some cosmic sources such as masers, where a very strong and narrow line in the passband makes it difficult to study other nearby lines because of the effect of spectral leakage. For detailed treatments of PFBs, see Crochiere and Rabiner (1981), Vaidyanathan (1990), and Harris et al (2003). Useful tutorials are available by Harris (1999) and Chennamangalam (2014).…”

Model-Based Design Methodology for Sampling Rate Converter

“…The polyphase components are sometimes called polyphase sub-filters or polyphase branches [7][8]. A polyphase component is usually implemented in the direct transversal form.…”

Implementation of a high-throughput low-latency polyphase channelizer on GPUs

“…A DFT is used to downconvert the output of PFB to baseband and allow the user to select desired channel indices. We will not derive or discuss the transformation of band-pass filters and mixers into a PCZ (for details on this, see [3]), but rather focus on design and implementation of an efficient PCZ architecture.…”

“…This is an IP operation across each row of the PFB. A commutator is used to present the input sample in a bottom-up fashion as shown in [3,4] since this is a downsampling operation. Once all Q rows of samples have been inserted into the input buffer, the IP operation is performed.…”

“…For this purpose, a polyphase channelizer was introduced in [3,4]. This architecture employed polyphase filter banks (PFBs) and discrete Fourier transform (DFT) operations to accomplish multiple channelization tasks at the same time.…”