Finite impulse response filter and digital signal receiving apparatus
US7254598B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 14, 2003 |
| Grant date | Aug 7, 2007 |
| Priority date | — |
| Expiry date | Feb 22, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H2218/085
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An A/D conversion section performs oversampling on an analog signal at a rate M times a symbol rate to convert the analog signal into a digital signal. A FIR filtering section has two delay-element sequences, each with a plurality of delay elements. The two delay-element sequences have different delay directions, i.e., a forward direction and a reverse direction. The delay directions can be switched, and according to a finite impulse response train having such delay-element sequences, a convolutional calculation is performed. A phase determining section determines a phase used in making a decision in a decision section. The decision section makes a decision on a filtered signal using the phase determined in the phase determining section to generate bit data. A digital signal receiving apparatus is thus achieved which determines a phase with a high accuracy without increasing the oversampling number, and performs a fast calculation while having a reduced circuitry scale.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.