Wideband self-adaptive RF cancellation circuit for full-duplex radio: Operating principle and measurements
Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific › peer-review
Details
| Original language | English |
|---|---|
| Title of host publication | 2015 IEEE 81st Vehicular Technology Conference (VTC Spring) |
| Publisher | The Institute of Electrical and Electronics Engineers, Inc. |
| ISBN (Print) | 9781479980888 |
| DOIs | |
| Publication status | Published - 1 Jul 2015 |
| Publication type | A4 Article in a conference publication |
| Event | IEEE Vehicular Technology Conference - Duration: 1 Jan 1900 → … |
Conference
| Conference | IEEE Vehicular Technology Conference |
|---|---|
| Period | 1/01/00 → … |
Abstract
This paper presents a novel RF circuit architecture for self-interference cancellation in inband full-duplex radio transceivers. The developed canceller is able to provide wideband cancellation with waveform bandwidths in the order of 100 MHz or beyond and contains also self-adaptive or self-healing features enabling automatic tracking of time-varying self-interference channel characteristics. In addition to architecture and operating principle descriptions, we also provide actual RF measurements at 2.4 GHz ISM band demonstrating the achievable cancellation levels with different bandwidths and when operating in different antenna configurations and under low-cost highly nonlinear power amplifier. In a very challenging example with a 100 MHz waveform bandwidth, around 41 dB total cancellation is obtained while the corresponding cancellation figure is close to 60 dB with the more conventional 20 MHz carrier bandwidth. Also, efficient tracking in time-varying reflection scenarios is demonstrated.
ASJC Scopus subject areas
Keywords
- Full-duplex, RF cancellation, Self adaptive, Self interference, Tracking