Direct sequence spread spectrum using non-antipodal phase shift keying
US6356580B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 6, 1999 |
| Grant date | Mar 12, 2002 |
| Priority date | — |
| Expiry date | Jul 6, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/707
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A reception simplified, reduced cost spread spectrum transceiver device and method. The transmitting portion of the transceiver antipodally modulates a pseudorandom code and non-antipodally modulates binary bit data onto a carrier wave. The receiving portion of the transceiver performs a mathematical squaring function on the received signal combination of pseudorandom code and data. Squaring the pseudorandom code results in a cancellation of the code and the data remains in the absence of the pseudorandom code. The device and method of the invention eliminates the need for storing or generating a local reference for the spreading code or the need for any knowledge of key signal parameters at the receiver greatly simplifying receiver circuitry and allowing receiver operation at low energy density and low operational cost. Additionally, the device and method of the invention eliminates the synchronization constraint between the transmitted data and spreading code of conventional systems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.