Collision detection using a multiple symbol noncoherent soft output detector
US9647797B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 3, 2016 |
| Grant date | May 9, 2017 |
| Priority date | — |
| Expiry date | Mar 3, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/233
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Systems and methods for detecting collisions in radio frequency tags in accordance with embodiments of the invention are disclosed. In one embodiment, a receiver system includes a receiver configured to receive and sample a phase modulated input signal, and a multiple symbol noncoherent soft output detector configured to receive the sampled input signal and to generate a soft metric indicative of the reliability of a detected symbol based upon observations over multiple symbols, a collision detector configured to calculate a decision metric from a set of soft metrics generated by the multiple symbol noncoherent soft output detector and detect a collision when the decision metric satisfies a predetermined criterion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.