Digitally Controlled Analog Wideband Interference Cancellation for In-Device Spectrum Sharing and Aggregation
| Autor: | Samir S. Soliman, Cong Nguyen, Insoo Hwang, Bongyong Song |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Pilot signal
Computer Networks and Communications business.industry Computer science 020208 electrical & electronic engineering 020206 networking & telecommunications 02 engineering and technology Adaptive filter Analogue filter Single antenna interference cancellation 0202 electrical engineering electronic engineering information engineering Key (cryptography) Electronic engineering Wireless Electrical and Electronic Engineering Wideband business Telecommunications Computer Science::Information Theory |
| Zdroj: | IEEE Journal on Selected Areas in Communications. 34:2838-2850 |
| ISSN: | 0733-8716 |
| DOI: | 10.1109/jsac.2016.2614949 |
| Popis: | In this paper, we present a feasibility of wideband analog self-interference cancellation with a newly proposed digitally controlled analog adaptive filter. We analyze the key existing issues and concerns in analog interference cancellation and propose novel solutions to cancel the self-interference with a simple 1-tap cancellation circuit. The proposed solution conducts a blind estimation of optimal analog filter coefficients in the digital domain without requiring a pilot signal. We present an end-to-end system analysis and 1-tap adaptive filter circuit analysis to show the feasibility of wideband cancellation. We then propose a few novel blind coefficient estimation algorithms and show their cancellation performance by both simulations and measurements from an actual prototype. The results suggest that our self-interference approach enables the simultaneous operation of the licensed and unlicensed technologies in the adjacent spectrum within a single device, which, in turn, facilitates graceful spectrum sharing and bandwidth aggregation between the licensed and unlicensed technologies. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|