Method and system for demodulation of downlink CDMA signals
US5572552A · kind A · utility
82Cited by
15References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 27, 1994 |
| Grant date | Nov 5, 1996 |
| Priority date | — |
| Expiry date | Jan 27, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B7/0865
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Demodulation of a CDMA downlink signal is performed by filtering correlations of the received signal with a known signature sequence. Unlike the conventional RAKE receiver, the filtering is not necessarily a FIR filter with coefficients equal to the conjugates of channel tap estimates. Instead, the present invention filters in such a way as to maximize the output signal-to-noise ratio, accounting for the fact that part of the noise comes from the same base station as the signal, so that it is colored by the same channel as the signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.