Duality between Broadcasting with Bandwidth Expansion and Bandwidth Compression Conference Paper uri icon

abstract

  • We consider the problem of broadcasting κ samples of an independent identically distributed (i.i.d) Gaussian source to two users in n - λκ uses of an AWGN channel. We develop a framework which shows a duality between a source-channel coding scheme for the case of λ > 1 and that for λ > 1. Using this duality, we derive a scheme for the case of λ < 1, which is the dual of a scheme recently proposed by Reznic, Zamir and Feder in [3]. This scheme, which provides the largest known achievable distortion region currently known, is also the same as that proposed by Prabhakaran et al in [4] specialized to the case of an i.i.d source with λ < 1. We also provide an explanation for why this scheme performs well by first analyzing the performance of source-channel coding schemes in the presence of a signal-to-noise ratio mismatch. ©2007 IEEE.

author list (cited authors)

  • Narayanan, K., Caire, G., & Wilson, M.

citation count

  • 12

publication date

  • June 2007

publisher