Spread spectrum CDMA communications system microwave overlay
US5161168A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 15, 1991 |
| Grant date | Nov 3, 1992 |
| Priority date | — |
| Expiry date | May 15, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J13/0077
- 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 a plurality of microwave users. The spread spectrum system 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 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, 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 station. The …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.