Noise cancellation method, receiver circuit, and electronic instrument
US8175136B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 11, 2008 |
| Grant date | May 8, 2012 |
| Priority date | — |
| Expiry date | Mar 8, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2201/70715
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A noise cancellation method includes: inputting an interference wave signal detected near a receiver section, and changing the phase and the amplitude of the input signal to generate a cancellation signal that cancels the input signal; performing correlation calculations on a signal obtained by adding the cancellation signal to a communication signal received by the receiver section and a code replica of a PRN code used for the communication signal, within a given correlation calculation target range that is included within a code phase range and a frequency range; and performing the correlation calculations within a non-signal range outside the correlation calculation target range, and controlling a phase shift amount and an amplitude change rate of the input signal based on the correlation calculation result.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.