ICASSP 2009, International conference on Acoustics, Speech and Signal Processing. April 19-24, 2009, Taipei, Taiwan
Concerning the uncertainty of channels and peak power constraint, we give a new practical layering scheme to do reliable transmission. In our scheme, Walsh matrix is employed to do layer-time coding. Regarding columns of a layer-time coding matrix as layers and rows as time, after Walsh layer-time coding, interference among layers can be removed or diminished by adding rows up. When there are layers decoded successfully in previous transmission, only not-yet-decoded layers will be retransmitted. Simulation results show that our Walsh layering scheme with hybrid automatic repeat request (HARQ) performs much better than the traditional singlelayer ARQ sequential transmission with respect to average time delay.
Type:
Conference
City:
Taipei
Date:
2009-04-19
Department:
Communication systems
Eurecom Ref:
2674
Copyright:
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