Communication apparatus and communication method

摘要

When a changer changes a communication parameter based on a channel characteristic, a selector selects a switch data sequence corresponding to the changed communication parameter. A serial-parallel converter performs a serial-parallel conversion on a switch data sequence. An IFFT unit performs an IFFT. A transmitter synthesizes a calculation result from the IFFT unit to generate data symbol, and generates a transmission frame based on the data symbol. The transmitter then transmits the transmission frame to a second apparatus. A receiver receives a transmission frame from the second apparatus to generate data symbol. An FFT unit performs an FFT on the data symbol to generate a parallel signal. If a correlator determines that a notification of the change in the communication parameter has been correctly transmitted based on an autocorrelation analysis of the parallel signal, a communication apparatus starts communication using the changed communication parameter.

主权项

1. A communication apparatus comprising:
a changer that changes a communication parameter based on a channel characteristic; a selector that selects one of a plurality of switch data sequence for which an autocorrelation function includes a peak present at a position other than an origin and which differ from one another in at least one of the positions and signs of the peak of the autocorrelation function other than the origin, based on the changed communication parameter; a switch notifier that performs a predetermined process on the switch data sequence selected by the selector to generate a transmission frame and transmits the transmission frame to a second apparatus; and a switch controller that starts wireless communication using the changed communication parameter after the transmission frame is transmitted.