Apparatus and method for demodulating a modulated signal
US5767738A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 21, 1996 |
| Grant date | Jun 16, 1998 |
| Priority date | — |
| Expiry date | Oct 21, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/233
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A receiver (156) includes both a coherent and noncoherent demodulator. When the confidence that estimates of the channel is high, the coherent demodulator is implemented. When the confidence that estimates of the channel is low, the noncoherent demodulator is implemented. A controlling microprocessor (162) controls the selection process and also provides a signal (158) to enable the noncoherent demodulator in instances when noncoherent demodulation would most likely be better than coherent demodulation. As an example, such an instance would be immediately after handoff of a mobile station (505) from a source base-station (503) to a target base-station (502).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.