Publications [#235976] of Robert Calderbank

Papers Published

1. Ashikhmin, A; Calderbank, AR, Grassmannian packings from operator ReedMuller codes, IEEE Transactions on Information Theory, vol. 56 no. 11 (November, 2010), pp. 5689-5714, Institute of Electrical and Electronics Engineers (IEEE), ISSN 0018-9448 [doi]
   (last updated on 2024/04/18)

   Abstract:
   This paper introduces multidimensional generalizations of binary Reed-Muller codes where the codewords are projection operators, and the corresponding subspaces are widely separated with respect to the chordal distance on Grassmannian space. Parameters of these Grassmannian packings are derived and a low complexity decoding algorithm is developed by modifying standard decoding algorithms for binary Reed-Muller codes. The subspaces are associated with projection operators determined by Pauli matrices appearing in the theory of quantum error correction and this connection with quantum stabilizer codes may be of independent interest. The Grassmannian packings constructed here find application in noncoherent wireless communication with multiple antennas, where separation with respect to the chordal distance on Grassmannian space guarantees closeness to the channel capacity. It is shown that the capacity of the noncoherent multiple-inputmultiple-output (MIMO) channel at both low and moderate signal-to-noise ratio (SNR) (under the constraint that only isotropically distributed unitary matrices are used for information transmission) is closely approximated by these packings. © 2006 IEEE.