Method and apparatus for estimating gain offsets for amplitude-modulated communication signals
US7668226B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 23, 2005 |
| Grant date | Feb 23, 2010 |
| Priority date | — |
| Expiry date | Feb 24, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2201/709727
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method of processing an amplitude-modulated traffic signal involves the determination of a gain offset between the traffic signal and a reference signal, e.g., a pilot signal, received in association with the traffic signal, based on relating values known or determined from the reference signal to that gain offset. For example, in at least one embodiment of a wireless communication receiver, one or more processing circuits are configured to compute the gain offset based on the average magnitude of estimated traffic symbols and a signal-to-noise ratio. The received traffic symbols can be estimated using soft combining weights calculated from the reference signal, as can the signal-to-noise ratio. With the gain offset thus determined, the estimated traffic symbols can be scaled properly for subsequent processing, such as in log-likelihood ratio processing to recover the traffic signal data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.