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Concurrent Channel Probing and Data Transmission in Full-duplex MIMO Systems by Qian, Zhenzhi; Wu, Fei; Zheng, Zizhan; Srinivasan, Kannan; Shroff, Ness B. is a scholarly article available to read on EtoBox.

What is Concurrent Channel Probing and Data Transmission in Full-duplex MIMO Systems about?

An essential step for achieving multiplexing gain in MIMO downlink systems is to collect accurate channel state information (CSI) from the users. Traditionally, CSIs have to be collected before any data can be transmitted. Such a sequential scheme incurs a large feedback overhead, which substantially limits the multiplexing gain especially in a network with a large number of users. In this paper, we propose a novel approach to mitigate the feedback overhead by leveraging the recently developed Full-duplex radios. Our approach is based on the key observation that using Full-duplex radios, when the base-station (BS) is collecting CSI of one user through the uplink channel, it can use the downlink channel to simultaneously transmit data to other (non-interfering) users for which CSIs are already known. By allowing concurrent channel probing and data transmission, our scheme can potentially achieve a higher throughput compared to traditional schemes using Half-duplex radios. The new flexibility introduced by our scheme, however, also leads to fundamental challenges in achieving throughout optimal scheduling. In this paper, we make an initial effort to this important problem by consider

Author

Qian, Zhenzhi; Wu, Fei; Zheng, Zizhan; Srinivasan, Kannan; Shroff, Ness B.

Published

2017

Language

EN