Patent ID: 8705507
Filing Date: 2014-04-22
Classification: H04B,H04J,H04L

Abstract:
1. A transmitting apparatus comprising: a transmission signal generating section configured to generate a transmission signal by multiplying a response signal with a cyclically shifted sequence defined by a cyclic shift value of a plural cyclic shift values and by spreading the multiplied response signal with an orthogonal sequence of plural orthogonal sequences, wherein the orthogonal sequence and the cyclic shift value are determined from a resource index, and the resource index is associated with a control channel element (CCE) number which indicates a number of a first CCE of one or more CCEs used to transmit a control signal in a downlink control channel; and a transmitting section configured to transmit the transmission signal using one or more antenna ports, wherein when a first antenna port and a second antenna port are used, said transmission signal generating section uses a first orthogonal sequence and a first cyclic shift value that are determined by a first resource index for the transmission signal transmitted using the first antenna port, and uses a second orthogonal sequence and a second cyclic shift value that are determined by a second resource index for the transmission signal transmitted using the second antenna port, the second resource index being a number which equals the first resource index plus one.