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 apparatus comprising:
memory that stores a first orthogonal matrix and a second orthogonal matrix, each of which is a matrix with N rows and N columns where N is a natural number equal to or larger than 2, the second orthogonal matrix generated by cyclically shifting chips of particular rows of the first orthogonal matrix; multiplying circuitry coupled to the memory, wherein the multiplying circuitry, in operation, multiplies demodulation reference signals for a first layer group with the first orthogonal matrix to obtain first multiplying results, and multiplies demodulation reference signals for a second layer group with the second orthogonal matrix to obtain second multiplying results; mapping circuitry coupled to the multiplying circuitry, wherein the mapping circuitry, in operation, superposingly maps the first multiplying results in a same time period of a first subcarrier group in a resource block, and superposingly maps the second multiplying results in a same time period of a second subcarrier group which is different from the first subcarrier group in the resource block, each of the first layer group and the second layer group comprising N layers; and a transmitter which, in operation, transmits the resource block on which the multiplied demodulation reference signals for the first layer group and the multiplied demodulation reference signals for the second layer group are mapped, the mapped demodulation reference signals to be used by a communication partner apparatus to demodulate data signals that are superposed in each layer of the first layer group and the second layer group in the resource block.