Diplexer elimination in microwave point-to-point FDD systems
US9287920B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 2013 |
| Grant date | Mar 15, 2016 |
| Priority date | — |
| Expiry date | Apr 22, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/525
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A circulator based transceiver sharing a common antenna between a receive signal path and a transmit signal path is disclosed. Techniques to reduce coupled transmit signals and coupled transmit noise in a receive signal path, implemented in a variety of embodiments is disclosed allowing elimination of a diplexer, simplification of circulator design and reduction of transceiver cost. The transceiver includes means to generate and couple a correction signal into the receive signal path to attenuate coupled transmit signal in the receive path. Furthermore, the transceiver includes echo cancellation techniques to attenuate transmit noise in the receive signal path. Methods to utilize the transceiver to attenuate coupled transmit signal and transmit noise may improve transceiver efficiency, for example, in demodulation techniques and processing of data signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.