Event Details
Chitchat: Efficient and Reliable Decoding for Two-transmitter NOMA without Power Control
Presenter: Wen Cui
Supervisor:
Date: Tue, December 8, 2020
Time: 10:00:00 - 11:00:00
Place: ZOOM - Please see below.
ABSTRACT
Place: REMOTE via Zoom
Zoom meeting link: https://uvic.zoom.us/j/7334747522?pwd=WCtES1Vva1JWODA4S3Jnb0hqZDhUZz09
Meeting ID: 733 474 7522
Password: 602230
(Note: Please log in to Zoom via SSO and your UVic Netlink ID)
Abstract: The Internet-of-Things (IoT) is growing at an unprecedented pace, making the wireless spectrum at a premium. To use the spectrum more efficiently, Non-Orthogonal Multiple Access (NOMA) was proposed to enable multiple users to transmit their signals in the same frequency at the same time. Many NOMA technologies require strict power control upon each individual user to decode the superimposed signal. However, this requirement is infeasible for many IoT devices that are heterogeneous and often low-cost. For other NOMA technologies that require no power control, a reliable performance can be only achieved by introducing repetitive information in each transmission, which in turn hurts the spectrum efficiency. In this seminar, I will present to you Chitchat, a new NOMA solution, which allows concurrent transmissions of two transmitters without any power control nor repetitive transmissions. Chitchat leverages the rotation code to provide both the diversity gain and the coding gain so that it can achieve high reliability while preserving the spectrum efficiency. We implement Chitchat on a software-defined radio platform and evaluate its performance in various scenarios.