Publications [#336869] of Vahid Tarokh

Papers Published

1. Haas, SM; Shapiro, JH; Tarokh, V, Space-time codes for wireless optical communications, Eurasip Journal on Applied Signal Processing, vol. 2002 no. 3 (January, 2002), pp. 211-220, Springer Nature [doi]
   (last updated on 2023/06/01)

   Abstract:
   A space-time channel coding technique is presented for overcoming turbulence-induced fading in an atmospheric optical heterodyne communication system that uses multiple transmit and receive apertures. In particular, a design criterion for minimizing the pairwise probability of codeword error in a space-time code (STC) is developed from a central limit theorem approximation. This design criterion maximizes the mean-to-standard-deviation ratio of the received energy difference between codewords. It leads to STCs that are a subset of the previously reported STCs for Rayleigh channels, namely those created from orthogonal designs. This approach also extends to other fading channels with independent, zero-mean path gains. Consequently, for large numbers of transmit and receive antennas, STCs created from orthogonal designs minimize the pairwise codeword error probability for this larger class of fading channels.