Analysis and Reduction of the Impact of Thermal Noise on the Full-Duplex OFDM Radio

Zhaowu Zhan 1 Guillaume Villemaud 1, * Jean-Marie Gorce 1
* Corresponding author
1 SOCRATE - Software and Cognitive radio for telecommunications
CITI - CITI Centre of Innovation in Telecommunications and Integration of services, Inria Grenoble - Rhône-Alpes
Abstract : Self-Interference has been significantly reduced by current cancelation methods for the practical design of Full- Duplex wireless. However, the residual self-interference is still much stronger than the thermal noise due to many factors, e.g. phase noise in local oscillator, I/Q imbalance, thermal noise and so on, limiting the self-interference cancelation. In this paper, the influence of the thermal noise on the active self-interference cancelation (ASIC) for wideband Full-Duplex OFDM wireless system is analytically studied and demonstrated. We propose a little modification to the structure of data packet of IEEE 802.11g to reduce the impact of the thermal noise on the active selfinterference cancelation (ASIC) for Full-Duplex OFDM wireless. The ADS-Matlab co-simulation results show that we can reduce the residual self-interference to only 1.5dB higher than the receiver thermal noise.
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Zhaowu Zhan, Guillaume Villemaud, Jean-Marie Gorce. Analysis and Reduction of the Impact of Thermal Noise on the Full-Duplex OFDM Radio. IEEE Radio Wireless Symposium, Jan 2014, Newport Beach, United States. ⟨hal-00920912⟩

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