GSM baseband receiver arrangement using digital signal processing
US6445736B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 14, 1998 |
| Grant date | Sep 3, 2002 |
| Priority date | — |
| Expiry date | Aug 14, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2332
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
GSM baseband receiver arrangement using digital signal processing is disclosed. The baseband receiver arrangement comprises two channel for inphase (Iin) and quadrature (Qin) components of the received signal. The DC offset of each channel is separately estimated by accumulating samples from the outputs of the second filter stages M1 and M2 and dividing the result by 64. The result is then negated and applied to the digital DC offset controls I1 and I2. This two stage process ensures that the majority DC offset is removed prior to variable gain, and the residual DC offset is removed before digital frequency shifting. Applying DC offset correction before the digital frequency shifting ensures that DC is annulled for any subsequent shift.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.