Changes between Version 1 and Version 2 of Asilomar2010_FullDuplex


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Timestamp:
Dec 1, 2010, 10:46:04 AM (13 years ago)
Author:
mduarte
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  • Asilomar2010_FullDuplex

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    66== Abstract ==
    7 We study full-duplex wireless communication systems where same band simultaneous bidirectional communication is achieved via cancellation of the self interfering signal. We present an analysis of the self interference cancellation mechanism and derive expressions for the average power   of the self interfering signal after RF and baseband cancellation. We present experimental results that show that the equations we have derived are a good fit for the measured data and the average percentage error  is less than 4.1\% for all the scenarios considered.  Perfect self interference cancellation is not possible in real systems due to noise in the estimates of the signals required for cancellation.  We show that self interference can be suppressed sufficiently such that the resulting full-duplex system capacity lies between the capacity of a half-duplex Multiple Input Multiple Output (MIMO) system using diversity techniques and the capacity of a half-duplex spatial multiplexing MIMO system. This result opens the possibility for the design of new systems and network protocols based on FD radios.
     7We study full-duplex wireless communication systems where same band simultaneous bidirectional communication is achieved via cancellation of the self-interfering signal. Using off-the-shelf MIMO radios, we present experimental results that characterize the suppression performance of three self-interference cancellation mechanisms, which combine a different mix of analog and digital cancellation. Our experimental results show that while the amount of self-interference increases linearly with the transmitted power, the self-interference can be sufficiently cancelled to make full-duplex wireless communication feasible in many cases. Our experimental results further show that if the self-interference is cancelled in the analog domain before the interfering signal reaches the receiver front end, then the resulting full-duplex system can achieve rates higher than the rates achieved by a half-duplex system with identical analog resources.