Radio frequency (RF) receiver with amplitude-shifted keying/frequency-shifted keying (ASK/FSK) duty cycle optimization algorithm
US7702038B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 7, 2006 |
| Grant date | Apr 20, 2010 |
| Priority date | — |
| Expiry date | Jan 17, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07C2209/61
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A radio frequency (RF) receiver for receiving transmissions of different modulations includes cycling between a first mode for receiving transmissions of a first modulation that occurs frequently and a second mode for receiving transmission of a second modulation that occurs infrequently. The example RF receiver is cycled between a first modulation for receiving a frequency shift keyed (FSK) transmission from a tire pressure monitoring (TPM) system and a second modulation for receiving an amplitude shift keyed (ASK) transmission from a remote keyless entry (RKE) system. The RF receiver cycles between different modulations to detect the most frequent FSK modulated transmissions while also detecting and receiving the relatively infrequent ASK modulated RKE transmissions without an undesirable delay.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.