SoftNull: Many-Antenna Full-Duplex Wireless via Digital Beamforming

  title={SoftNull: Many-Antenna Full-Duplex Wireless via Digital Beamforming},
  author={Evan Everett and Clayton Shepard and Lin Zhong and Ashutosh Sabharwal},
  journal={IEEE Transactions on Wireless Communications},
In this paper, we present and study a digital-controlled method, called SoftNull, to enable full-duplex in many-antenna systems. Unlike most designs that rely on analog cancelers to suppress self-interference, SoftNull relies on digital transmit beamforming to reduce self-interference. SoftNull does not attempt to perfectly null self-interference, but instead seeks to reduce self-interference sufficiently to prevent swamping the receiver's dynamic range. Residual self-interference is then… CONTINUE READING


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Full-duplex wireless with large antenna arrays

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