Adaptive equalizer for digital cellular radio
US5231648A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 21, 1991 |
| Grant date | Jul 27, 1993 |
| Priority date | — |
| Expiry date | Mar 21, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B7/005
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The present invention provides a method of estimating parameters of a mobile radio channel which are used for providing the equalization and synchronization of the radio channel. The channel is modelled as a discrete number of independent Rayleigh-faded propagation paths. First, the relative delay of each path is estimated, using maximum likelihood methods. Using this information, the associated time-varying path weights are then determined using a least-squares fit. This is sufficient information to estimate the impulse response of the channel. The actual equalizer weights are then obtained by inverting the estimated channel impulse response.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.