Thesis
Analog simultaneous transmit and receive communication system
Washington State University
Master of Science (MS), Washington State University
2019
Handle:
https://hdl.handle.net/2376/102654
Abstract
Simultaneously transmit and receive (STAR) communication systems--also known as full-duplex--have the potential to increase wireless communication efficiency two-fold. Full duplex systems achieve this efficiency by simultaneously transmitting and receiving signals on one frequency. The fundamental issue with STAR systems primarily concerns transmission power. The transmission power is far greater than the receive power and interferes with signals received. This thesis presents findings from an analog STAR communication system using passive and active circuitry as well as a microstrip patch and monopole antenna system. Findings presented in this thesis were achieved through duplicating the transmit signal, shifting the phase by 180° , attenuating the amplitude of the signal, and finally injecting the filtered transmit signal into the receive signal to achieve self-interference cancellation. To achieve a robust STAR communication system, -100 dB of isolation or less is needed to be reliable. The STAR system is composed of three parts: antenna, analog circuitry, and digital circuitry. This thesis exclusively explores the antenna system and analog circuitry. Modeled circuitry presented provides approximately -36 dB of isolation and when combined with the antenna system tuned for 2.45 GHz center frequency, approximately -79 dB of total isolation is achieved. Lastly, this work will present methodologies, simulations, and measured results and further compare them to similar systems.
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Details
- Title
- Analog simultaneous transmit and receive communication system
- Creators
- Nicholas Trudeau
- Contributors
- Tutku Karaçolak (Degree Supervisor)
- Awarding Institution
- Washington State University
- Academic Unit
- Electrical Engineering and Computer Science, School of
- Theses and Dissertations
- Master of Science (MS), Washington State University
- Publisher
- Washington State University; [Pullman, Washington] :
- Identifiers
- 99900525116701842
- Language
- English
- Resource Type
- Thesis