A Reliable Multiple Access Scheme Based on Chirp Spread Spectrum and Turbo Codes

Chirp;Turbo Codes;Multiple Access;NOMA

Arman Moghadam, Aidaadvisor:Khandani, Amir Keyvan ; affiliation1:Faculty of Engineering ; Khandani, Amir Keyvan ;

University of Waterloo

关键词: NOMA;    Chirp;    Master Thesis;    Turbo Codes;    Multiple Access;   

Others  :  https://uwspace.uwaterloo.ca/bitstream/10012/12215/1/ArmanMoghadam_Aida.pdf

瑞士|英语

来源: UWSPACE Waterloo Institutional Repository

【 摘 要 】

Nowadays, smart devices are the indispensable part of everyone's life and they playan important role in the advancement of industries and businesses.These devices are able tocommunicate with themselves and build the super network of the Internet of Things(IoT).Therefore, the need for the underlying structure of wireless data communications gainsmomentum. We require a wireless communication to support massive connectivity withultra-fast data transmission rate and ultra-low latency. This research explores two possiblemethods of tackling the issues of the current communication systems for getting closer tothe realization of the IoT. First, a grant-free scheme for uplink communication is proposed.The idea is to the combine the control signals with data signals by superimposing them ontop of each other with minimal degradation of both signals. Moreover, it is well-establishedthat orthogonal multiple access schemes cannot support the massive connectivity. Ergo, the second part of this research investigates a Non-Orthogonal Multiple Access(NOMA) schemethat exploits the powerful notion of turbo codes for separating the signals in a slow fadingchannel. It has been shown that in spite of the simplicity of the design, it has the potentialsto surpass the performance of Sparse Code Multiple Access(SCMA) scheme.