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Radio apparatus and communication system utilizing the same

  • US 20070076582A1
  • Filed: 09/19/2006
  • Published: 04/05/2007
  • Est. Priority Date: 09/20/2005
  • Status: Active Grant
First Claim
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1. A radio apparatus for transmitting a packet signal composed of a plurality of streams, the apparatus comprising:

  • a generation unit which uses as a reference a known signal assigned to one of a plurality of streams forming a packet signal and generates a packet signal to be finally transmitted, by applying a cyclic timing shift within the known signal to a known signal assigned to another stream; and

    a communication unit which transmits the packet signal generated by said generation unit, wherein said generation unit generates a plurality of packet signals by varying an amount of the timing shift and appends an identification number with which to uniquely identify each of the plurality of generated packet signals, to the each packet signal and wherein said communication unit transmits a packet signal, composed of the plurality of streams, whose timing shift amount is made to differ and to which the identification number is appended, as an inquiry signal on a transmission rate, and receives a response signal to which the same identification number as the inquiry signal is appended.

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