Wideband Self-Adaptive RF Cancellation Circuit for Full-Duplex Radio: Operating Principle and Measurements
| Autor: | Yang-Seok Choi, Petteri Liikkanen, Dani Korpi, Mikko Valkama, Shilpa Talwar, Timo Huusari |
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| Rok vydání: | 2015 |
| Předmět: |
FOS: Computer and information sciences
Computer science business.industry Computer Science - Information Theory Information Theory (cs.IT) Bandwidth (signal processing) Duplex (telecommunications) Single antenna interference cancellation Electronic engineering Waveform Wideband Transceiver Antenna (radio) Telecommunications business ISM band Communication channel |
| Zdroj: | VTC Spring |
| DOI: | 10.48550/arxiv.1503.02877 |
| Popis: | 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. Comment: 7 pages, to be presented in 2015 IEEE 81st Vehicular Technology Conference |
| Databáze: | OpenAIRE |
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