Communication method and communication apparatus

摘要

The present disclosure provides an orthogonal codes based code division multiplexing method of performing the code division multiplexing of demodulation reference signals in multiple layers of resource blocks by using orthogonal matrices, the method comprising: changing the order of chips in particular rows of a first orthogonal matrix to obtain a second orthogonal matrix with the changed order of chips; and multiplying the chips in respective rows of the second orthogonal matrix by the demodulation reference signals in corresponding layers of resource blocks correspondingly in the time direction to obtain code division multiplexing signals. The technical scheme of the present disclosure can improve the power jitter situation of downlink signals on the time, thereby the usage efficiency of the power amplifier at the base station side can be improved.

主权项

1. A communication method comprising:
receiving a signal on which a plurality of layers are multiplexed, wherein, in the received signal, first multiplying results are superposed and mapped to a same time frame of a first subcarrier group and second multiplying results are superposed and mapped to a same time frame of a second subcarrier group which is different from the first subcarrier group, the first and the second subcarrier groups being included in a resource block, the first multiplying results being obtained by multiplying demodulation reference signals for respective layers included in a first layer group with chips of respective rows of a first orthogonal matrix, and the second multiplying results being obtained by multiplying demodulation reference signals for respective layers included in a second layer group with chips of respective rows of a second orthogonal matrix, each of the first layer group and the second layer group comprising N layers, each of the first orthogonal matrix and the second orthogonal matrix being a matrix with N rows and N columns where N is a natural number equal to or larger than 2, and the second orthogonal matrix being generated by cyclically shifting chips of particular rows of the first orthogonal matrix; and demultiplexing the demodulation reference signals for respective layers included in the first layer group, by multiplying signals that are respectively mapped to a plurality of subcarriers included in the first subcarrier group with the chips of respective rows of the first orthogonal matrix, and demultiplexing the demodulation reference signals for respective layers included in the second layer group, by multiplying signals that are respectively mapped to a plurality of subcarriers included in the second subcarrier group with the chips of respective rows of the second orthogonal matrix.