High rate Reed-Solomon concatenated trellis coded 16 star QAM system for transmission of data over cellular mobile radio
US5659578A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 23, 1994 |
| Grant date | Aug 19, 1997 |
| Priority date | — |
| Expiry date | Nov 23, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/04
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A cellular communication system provides for trellis encoding/decoding of a 16 Star QAM signal. The system includes a transmitter circuit and a receiver circuit. The transmitter circuit has a Reed-Solomon encoder, an outer interleaver circuit for spreading burst errors, a cyclic trellis encoder, an inner interleaver circuit for reducing channel memory, a 16 Star QAM mapper and a radio frequency transmitter. The receiver circuit has a radio frequency receiver, equalization and filtering circuitry and timing and synchronization recovery circuitry. The receiver also has an inner deinterleaver, a trellis decoder, an outer deinterleaver, and a Reed-Solomon decoder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.