Patent ID: 7801179
Filing Date: 2010-09-21
Classification: H04B,H04L

Abstract:
1. A radio apparatus for transmitting a packet signal composed of a plurality of streams, the apparatus comprising: an input unit which inputs a plurality of combinations of control signal on a data signal and said data signal wherein the combination contains data signals which are to be assigned respectively to a plurality of streams; a generation unit which generates a packet signal in a manner such that while a first known signal is being assigned anterior to a control signal contained in a leading combination and a second known signal is being assigned posterior to said control signal, a data signal contained in the leading combination is assigned posterior to the second known signal and then the remaining combinations are assigned, posterior to said data signal, sequentially in the order of a control signal and a data signal among the plurality of combinations inputted by said input unit; and a transmitter which transmits the packet signal generated by said generation unit, wherein while using as a reference a first known signal assigned to one of a plurality of streams and applying a cyclic timing shift within the first known signal to a first known signal assigned to another stream, said generation unit applies also a timing shift to the second known signal and the control signal, and wherein while setting an amount of timing shift to different values for the first known signal and the second known signal, said generation unit sets an amount of timing shift in a manner that an amount of timing shift for a control signal contained in the leading combination is equal to that for the first known signal and an amount of timing shift for a control signal contained in each of the remaining combinations is equal to that for the second known signal.