Communication system for determining data transmitting scheme according to channel state

摘要

Disclosed is a data transmission method that may enhance a channel capacity in a wireless channel environment of a frequency band having a high directivity in which a transmission apparatus may form a transmission beam and transmit a training signal while sequentially changing a direction of the formed transmission beam, a reception apparatus may form a reception beam and receive the training signal while sequentially changing a direction of the formed reception beam, and the transmission apparatus may receive a response signal from the reception apparatus with respect to the training signal and determine a data transmission scheme based on the received response signal.

主权项

1. A method of a transmission apparatus for transmitting data to a reception apparatus using a plurality of antennas, comprising:
forming a beam into a predetermined direction using the plurality of antennas; repeatedly transmitting a training signal to the reception apparatus while sequentially changing a direction of the formed beam, each transmission being in a different direction, and receiving at least one response signal from the reception apparatus with respect to the transmitted training signals; determining a number of channel responses based on a magnitude and a time interval of each of the at least one response signal; determining presence of a multipath based on the determined number of channel responses, and a magnitude and a direction of each of the at least one response signal; and determining a data transmission scheme, which is one of
a first transmission scheme, in which a plurality of beams are formed and different pieces of the data are transmitted by each of the formed beams, anda second transmission scheme, in which a plurality of beams are formed and a same piece of the data is transmitted by each of the formed beams,based on the determined number of channel responses and the determined presence of a multipath, for transmitting the data to the reception apparatus.