Apparatus and method for digitally processing signals in a radio frequency communication system
US5406629A · kind A · utility
25Cited by
8References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 20, 1993 |
| Grant date | Apr 11, 1995 |
| Priority date | — |
| Expiry date | Dec 20, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J13/0048
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A plurality of input signals are processed (75) using a Hadamard transform (52) to produce a combined Walsh covered parallel sequence which is sampled in time. The time samples are commutated (76) by a switch (53) or multiplexer to form a Walsh covered serial sequence. The Walsh covered serial sequence is then quadrature phase shift keyed (77) and transmitted (79).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.