Patent ID: 9106355
Filing Date: 2015-08-11
Classification: H04B,H04J,H04L,H04W

Abstract:
1. A transmitting apparatus configured to transmit, to a receiving apparatus, using a plurality of antenna ports, at least one of a first reference signal used in the receiving apparatus to demodulate received data and a second reference signal used in the receiving apparatus to measure receiving quality, the transmitting apparatus comprising: a generating section that generates at least one of the first reference signal and the second reference signal based on identification information of a reference signal pattern used for the first reference signal and the second reference signal; and a transmitting section that transmits at least one of the generated first reference signal and second reference signal, wherein: the reference signal pattern includes a first pattern and a second pattern; the first pattern includes pieces of identification information of the plurality of antenna ports and cyclic shift values, which are given to a cyclic shift sequence, respectively corresponding to the pieces of identification information of the plurality of antenna ports; the second pattern includes the pieces of identification information of the plurality of antenna ports and identification information of a first Walsh sequence or a second Walsh sequence corresponding to each of the pieces of identification information of the plurality of antenna ports; and the reference signal pattern of the first reference signal and the reference signal pattern of the second reference signal have a first relationship in which the reference signal pattern of the second reference signal is obtained by adding a length corresponding to a sequence length of the cyclic shift sequence×¼ or ¾ to the cyclic shift values and inverting the identification information of the first Walsh sequence or the second Walsh sequence, the cyclic shift values being a component of the first pattern in the reference signal pattern of the first reference signal, the identification information of the first Walsh sequence or the second Walsh sequence being a component of the second pattern in the reference signal pattern of the first reference signal.