Transmitter, receiver and radio communication method

摘要

The present invention aims to provide a transmitter, a receiver and a radio communication method capable of preventing any increase in overhead due to insertion of reference signals without deteriorating the channel estimation accuracy. The radio communication method is provided for mapping reference signals to radio resources of a plurality of layers and transmitting the reference signals, having the steps of: generating the reference signals; oversampling the reference signals; and mapping the oversampled reference signals to resource elements of the layers respectively. Reference signals to be mapped to different layers are subjected to frequency division multiplexing in resource elements of same time and frequency domains.

主权项

1. A radio communication method for mapping reference signals to radio resources of a plurality of layers and transmitting the reference signals, the radio communication method comprising the steps of:
generating the reference signals; oversampling the reference signals; applying cyclic shifts to the reference signals oversampled; and mapping the reference signals applied with the cyclic shifts, to resource elements of the layers respectively, wherein a plurality of same reference signals are mapped along a frequency direction in each of resource elements of same time and frequency domains in respective layers and reference signals of the respective layers are cyclic shift multiplexed.