Automatic gain control for improved decoding of multi-carrier signal
US6480528B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 11, 1999 |
| Grant date | Nov 12, 2002 |
| Priority date | — |
| Expiry date | Jun 11, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L5/06
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method and a receiver for processing a desired signal for decoding (i.e., by a decoder). In accordance with the method, an input signal that includes the desired signal and additional signals is received and filtered with a first filter having a bandwidth greater than a bandwidth of the desired signal. The filtered signal is then sampled to generate discrete time samples, which is then filtered with a discrete time matched filter. The filtered samples are then scaled with a scaling factor and quantized. A quantity related to an amplitude of the quantized samples (i.e., power) is measured, and the scaling factor is adjusted in accordance with the measured quantity. The quantized samples can be further processed (i.e., demodulated) and provided to a decoder. The desired signal can be a quadrature modulated signal, in which case matched filtering, scaling, and quantization are performed on the in-phase and quadrature components of the desired signal. The adjustment of the scaling factor can be performed by an automatic gain control (AGC) loop that compares the measured quantity (e.g., signal power of the quantized samples) against a predetermined value to generate error values. The …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.