Speed-based, hybrid parametric/non-parametric equalization
US8041325B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 22, 2008 |
| Grant date | Oct 18, 2011 |
| Priority date | — |
| Expiry date | Jun 9, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2201/709727
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A mobile receiver having a multi-mode interference suppression function and a way to estimate its speed utilizes a parametric approach to interference suppression at high speeds, and a nonparametric approach at low speeds. In particular, if the mobile receiver is currently operating in a nonparametric mode and its speed exceeds a first predetermined threshold, the mobile receiver switches to a parametric mode. Conversely, if the mobile receiver is currently in parametric mode and its speed is less than a second predetermined threshold, the mobile receiver switches to nonparametric mode. In one embodiment, the speed may be estimated by a Doppler frequency in the received signal, and the thresholds are Doppler frequencies. In one embodiment, the first and second thresholds are different, creating a hysteresis in the mode switching.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.