Methods of processing a radio frequency signal, signal processing devices for carrying out the methods, radio frequency front-ends, radio receivers and GNSS receivers
US9356719B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 12, 2013 |
| Grant date | May 31, 2016 |
| Priority date | — |
| Expiry date | Sep 1, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/36
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A radio frequency signal is frequency-translated to form a complex first intermediate signal where a frequency corresponding to a GPS center frequency is at an intermediate frequency. In a multiplexing conversion unit a complex multiplexed conversion signal which assumes different conversion frequencies is derived from a clock signal where the frequency of the latter is divided alternately by one of two divisors in a divider circuit and further by two in a phase shifter. The conversion signal is mixed with the first intermediate signal in a conversion mixer to provide a multiplexed second intermediate signal where, depending in each case on the conversion frequency, a frequency corresponding to a GLONASS center frequency and a frequency corresponding to a BeiDou center frequency are alternately shifted close to the intermediate frequency. The first intermediate signal and the second intermediate signal are then processed in a baseband unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.