Radiotelephone receiver and method with improved dynamic range and DC offset correction
US6321073A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 31, 2000 |
| Grant date | Nov 20, 2001 |
| Priority date | — |
| Expiry date | Jan 31, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G3/3078
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An automatic gain control apparatus (106) and method for a radiotelephone receiver employs stored inverse transfer function data (400) of the radiotelephone receiver and a gain estimation circuit (200). The gain estimation circuit (200) estimates the input power of received signal (103) and determines a required gain based on a nonlinear portion of the inverse transfer function data (400) of the radiotelephone receiver to provide an improved dynamic range of the receiver. The apparatus and method performs convergence within one iteration to perform fast gain control. In addition, if desired, a DC offset compensation circuit, such as a feedforward DC offset compensation circuit (202), compensates the digital representation of the input signal for use by the gain estimation circuit (200).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.