Method and apparatus for cancelling interference jamming in digital radio transmission
US5982825A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 26, 1996 |
| Grant date | Nov 9, 1999 |
| Priority date | — |
| Expiry date | Dec 26, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L1/08
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
At a transmitter side, signals are provided with a delay difference with a plurality of branches, coded multiplexed by spectrum spreaders and a combination unit, and transmitted by a single antenna. At a receiver side, the signals are received by a single antenna, and diversity branches are extracted and separated by first and second spectrum de-spreaders. They are subject to linear combination so that the mean square of the decision error signals is minimized. The output passes through an adaptive matched filter and an adaptive equalizer so as to provide an output from which interference waves are eliminated. Thus, interference is eliminated and diversity gain for a signal is ensured, while reducing the scale and cost of a system without using a plurality of antennae.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.