Patent ID: 8228921
Filing Date: 2012-07-24
Classification: H04B,H04L

Abstract:
1. A radio apparatus, comprising: an interface which inputs a plurality of data signals to be transmitted in parallel from a plurality of antennas, each data signal being assigned to at least one stream; a generator which generates a packet signal by arranging the plurality of data signals in a manner that, among the plurality of data signals inputted in said interface, a data signal of a higher data rate is assigned in an anterior part, the packet signal comprising training signals to be assigned to M streams, respectively and the data signals to be assigned to N of M streams, respectively, wherein N and M are integers, N<M, and N is greater than 0; a specifier which specifies a terminal apparatus to which a training signal to be assigned to a stream other than the N of M streams, is to be transmitted, among terminal apparatuses to which the plurality of data signals contained in the packet signal generated by said generator are to be transmitted respectively; an adding unit including: a transmitter which transmits the packet signal to which the training signal has been appended by said adding unit.