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METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING ACK/NACK SIGNAL TO SUPPORT HYBRID AUTOMATIC REPEAT REQUEST FOR MULTI-LAYER TRANSMISSION

  • US 20080095040A1
  • Filed: 10/24/2007
  • Published: 04/24/2008
  • Est. Priority Date: 10/24/2006
  • Status: Abandoned Application
First Claim
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1. A method for transmitting an Acknowledge (ACK)/Non-Acknowledge (NACK) signal to support Hybrid Automatic Repeat reQuest (H-ARQ) in an Orthogonal Frequency Division Multiplexing (OFDM) system, the method comprising the steps of:

  • selecting one of a plurality of Discrete Fourier Transformer (DFT) input positions mapped to data channels over which a received data stream is transmitted in a group corresponding to a layer over which the received data stream is transmitted, wherein the plurality of input positions are grouped into N groups for N layers for transmitting different data streams, and the input positions in each group are mapped to different data channels; and

    transmitting an ACK/NACK signal for the received data stream over the selected DFT input position.

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