Method and apparatus for resolving phase ambiguities in trellis coded modulated data
US5233630A · kind A · utility
140Cited by
5References
41Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 3, 1991 |
| Grant date | Aug 3, 1993 |
| Priority date | — |
| Expiry date | May 3, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/186
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A codec for resolving transmission phase ambiguities in the M-ary PSK modulation of trellis coded data. A trellis encoder uses a differential encoder and a convolutional encoder, along with multiplexed differential encoders, to generate from sets of input data bits corresponding phase point values for use in M-ary PSK carrier modulation. A trellis decoder uses a Viterbi decoder and a differential decoder, along with multiplexed differential decoders, to produce estimates of the original input data bits from the received signal sector value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.