Communication apparatus and communication method, computer program, and communication system

摘要

A learning on a weight of an adaptive array antenna which becomes necessary for a space division multiple access is carried out while a backward compatibility with a conventional standard is maintained.;When a TRQ frame and a training frame for the learning are exchanged, a spoof is applied on these frames to preferably avoid collisions with a surrounding station STA4 that follows a conventional standard. Also, after the weight of the adaptive array antenna is learnt, a STA0 multiplexes and transmits the plurality of data frames addressed to a plurality of users while a wireless resource on a spatial axis is shared by the plurality of users, so that a throughput for one-to-many, that is, for the plurality of users as a whole is improved.

主权项

1. A communication apparatus comprising:
an antenna element; a communication unit that performs a transmission and reception processing of a wireless signal by using the antenna element; and one or more processors operable to generate a training frame composed of a first field described based on a first communication standard with a downward compatibility and a second field comprising a training signal for a communication partner provided with a plurality of antenna elements to learn a weight of an adaptive array antenna, the training frame to be transmitted from the communication unit, wherein the training frame is obtained by multiplexing the training signal on a payload section of a data frame of the first field regulated by the first communication standard, wherein the training signal comprising unique known sequences is transmitted in a signal arrangement through a phase rotation by 90 degrees such that information is transmitted in a form in which the payload section and the training signal are orthogonal to each other.