Location of Repository

Full-Duplex Bidirectional MIMO: Achievable Rates Under Limited Dynamic Range

By Brian P. Day, Adam R. Margetts, Daniel W. Bliss and Philip Schniter

Abstract

Abstract—In this paper, we consider the problem of full-duplex bidirectional communication between a pair of modems, each with multiple transmit and receive antennas. The principal difficulty in implementing such a system is that, due to the close proximity of each modem’s transmit antennas to its receive antennas, each modem’s outgoing signal can exceed the dynamic range of its input circuitry, making it difficult—if not impossible—to recover the desired incoming signal. To address these challenges, we consider systems that use pilot-aided channel estimates to perform transmit beamforming, receive beamforming, and interference cancellation. Modeling transmitter/receiver dynamic-range limitations explicitly, we derive tight upper and lower bounds on the achievable sum-rate, and propose a transmission scheme based on maximization of the lower bound, which requires us to (numerically) solve a nonconvex optimization problem. In addition, we derive an analytic approximation to the achievable sum-rate, and show, numerically, that it is quite accurate. We then study the behavior of the sum-rate as a function of signal-to-noise ratio, interference-to-noise ratio, transmitter/receiver dynamic range, number of antennas, and training length, using optimized half-duplex signaling as a baseline. Index Terms—Channel estimation, channel models, full-duplex, information theory, limited dynamic range, MIMO, wireless communication. I

Year: 2013
OAI identifier: oai:CiteSeerX.psu:10.1.1.359.7460
Provided by: CiteSeerX
Download PDF:
Sorry, we are unable to provide the full text but you may find it at the following location(s):
  • http://citeseerx.ist.psu.edu/v... (external link)
  • http://ece.osu.edu/%7Eschniter... (external link)
  • Suggested articles


    To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.