Title :
MIMO broadcast channel with continuous feedback using full-duplex radios
Author :
Xu Du ; Tadrous, John ; Dick, Chris ; Sabharwal, Ashutosh
Author_Institution :
Dept. of Electr. & Comput. Eng., Rice Univ., Houston, TX, USA
Abstract :
In this paper, we study the use of full-duplex radios for continuous feedback of channel state information in MIMO broadcast channels. The simultaneous transmission of feedback on the same frequency band as downlink transmissions causes inter-node interference (INI) at the receiver. We quantify the impact of INI and associated tradeoff in the design of the feedback channel. We show that a continuously adaptive beamforming strategy can achieve higher multiplexing gain with same feedback resources compared to its half-duplex counterpart.
Keywords :
MIMO communication; array signal processing; broadcast channels; feedback; interference (signal); INI; MIMO broadcast channel; adaptive beamforming strategy; channel state information; continuous feedback; design tradeoff; downlink transmission; feedback channel; full-duplex radio; internode interference; multiple input multiple output broadcast channel; multiplexing gain; Array signal processing; Downlink; Interference; MIMO; Multiplexing; Radio transmitters; Signal to noise ratio;
Conference_Titel :
Signals, Systems and Computers, 2014 48th Asilomar Conference on
Print_ISBN :
978-1-4799-8295-0
DOI :
10.1109/ACSSC.2014.7094757
