Selectively disabling interference cancellation based on channel dispersion estimation
US7535980B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 13, 2005 |
| Grant date | May 19, 2009 |
| Priority date | — |
| Expiry date | Jun 15, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/03318
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
This invention provides channel dispersion estimation algorithm(s). This channel dispersion estimation algorithm(s) may be implemented within a channel length estimation module of a single-branch or multi-branch equalizer processing module that enables interference cancellation when the channel length or channel delay spread associated with received radio frequency (RF) bursts compares unfavorably to predetermined thresholds. The channel dispersion estimation algorithm identifies when the radio frequency (RF) bursts have a channel length or channel delay spread that can affect receiver performance. The channel length estimation module may disable interference cancellation in response to such a channel length or channel delay spread. Additionally, the channel length estimation module may adjust the number of equalizer states for the single-branch or first branch of a multi-branch equalizer based the channel length or channel delay spread. The multi-branch equalizer improves the signal-to-noise ratio by improving the equalization by selectively disabling interference cancellation and adjusting the number of equalizer states for the single-branch or first branch equalizer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.