Ultra wideband receiver with high speed noise and interference tracking threshold
US5901172A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 11, 1997 |
| Grant date | May 4, 1999 |
| Priority date | — |
| Expiry date | Jun 11, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/062
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An UWB receiver utilizing a microwave tunnel diode as a single pulse detector for short pulse, impulse, baseband or ultra wideband signals. The tunnel diode detector's bias point is set at system start-up, through an automatic calibration procedure to its highest sensitivity point relative to the desired bit error rate performance (based upon internal noise only) and remains there during the entire reception process. High noise immunity is achieved through the use of a high speed, adaptive dynamic range extension process using a high speed, Gallium Arsenide (GaAs) voltage variable attenuator (VVA) whose instantaneous attenuation level is determined by a periodic sampling of the ambient noise environment. Microprocessor-controlled detector time-gating is performed to switch the tunnel diode detector to the receiver front end circuitry for reception of an incoming UWB pulse, and alternately to ground through a resistor to discharge stored charge on the tunnel diode detector. In a second embodiment, two tunnel diode detectors are utilized in parallel, one biased for data detection and the other biased for noise detection, such that data detection can be interpreted based on simultaneo…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.