85 research outputs found

    Optimum combining in digital mobile radio with cochannel interference

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    Upper bounds on the bit-error rate of optimum combining in wireless systems

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    Space-time-frequency (STF) coding for MIMO-OFDM systems

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    From D-Dbar Pairs to Branes in Motion

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    We investigate various supersymmetric brane intersections. Motivated by the recent results on supertubes, we investigate general constraints in which parallel brane-antibrane configurations are supersymmetric. Dual descriptions of these configurations involve systems of branes in relative motion. In particular, we find new supersymmetric configurations which are not related to a static brane intersection by a boost. In these new configurations, the intersection point moves at the speed of light. These systems provide interesting time dependent backgrounds for open strings.Comment: 28+1 pages, 8 figures, uses JHEP3.cl
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