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Apparatus and method for transitting channel quality indicator and acknowledgement signals in SC-FDMA communication systems

  • US 9,806,869 B2
  • Filed: 11/21/2016
  • Issued: 10/31/2017
  • Est. Priority Date: 07/16/2007
  • Status: Active Grant
First Claim
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1. A method for transmitting one or more positive or negative acknowledgement (ACK/NACK) bits in response to data reception in a single-carrier frequency division multiple access (SC-FDMA) communication system, the method comprising:

  • if the one or more ACK/NACK bits consists of one bit,applying a first code to a first symbol, if the acknowledgement bit indicates NACK, andapplying a second code to the first symbol, if the acknowledgement bit indicates ACK;

    if the one or more ACK/NACK bits consists of two bits representing two acknowledgements, applying quadrature phase shift keying (QPSK) modulation to the first symbol based on a value of the two ACK/NACK bits;

    if no ACK/NACK bit exists, applying the first code to the first symbol; and

    transmitting the first symbol and a second symbol in a slot.

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