Processor for a radio receiver
US10018731B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 15, 2015 |
| Grant date | Jul 10, 2018 |
| Priority date | — |
| Expiry date | Sep 13, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/30
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A processor for a radio receiver is adapted to process direct sequence spread spectrum (DS-SS signals), and includes a demodulator, digitizer, correlator, and chip-matched filter (CMF) wherein the digitizer sample rate is selected to take a plurality of samples of each incoming chip at differing points thereon compared to sample points on an adjacent chip and to sample the chip at a non-integer multiple of the chip rate, wherein the CMF is arranged to filter the output of the digitizer. A sample selection unit is arranged to select a single sample from the CMF for input to each tap of the correlator, the selected sample being chosen as that nearest in time to a desired ideal time in relation to a timing reference point on the chip. An improved correlation function results, leading to better tracking performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.