Spread spectrum microwave overlay with notch filter
US5185762A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 15, 1991 |
| Grant date | Feb 9, 1993 |
| Priority date | — |
| Expiry date | May 15, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W52/346
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A spread spectrum CDMA communications system for communicating data and/or digitized voice between a plurality of users to a plurality of PCN units. The spread spectrum communications system is located within a same geographical region as occupied by an existing microwave system. The spread spectrum can operate without causing undue interference to the microwave system and the microwave system can operate without causing significant interference, less than 1% total users affected, to the PCN system. The spread spectrum CDMA communications system includes a plurality of PCN-base stations and a plurality of PCN units. A PCN-base station has a device for converting the format of the data into a form suitable for communicating over radio waves, a spread spectrum modulator for spread spectrum processing the data, a notch filter, and a transmitter for transmitting the spread spectrum processed converted data from the PCN-base station to a PCN unit. The PCN-base station also has an antenna, and spread spectrum detectors for recovering data communicated from the PCN units. A PCN unit has an antenna, and a detector coupled to the antenna for recovering data communicated from the PCN-base st…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.