Data sending and receiving method, and data sending and receiving device

A data receiving method, comprising:

• receiving data and processing the received data to obtain a code-division-multiplexed data stream;
• processing the code-division-multiplexed data stream to generate a pre-determined number of first symbol streams, wherein the processing the code-division-multiplexed data stream to generate a pre-determined number of first symbol streams comprises:
• de-multiplexing the code-division-multiplexed data stream to generate a pre-determined number of de-multiplexed data streams;
• and
• extracting, from the pre-determined number of de-multiplexed data streams, symbol streams which have been repeated as a pre-determined unit for a pre-determined number of times respectively, as the pre-determined number of first symbol streams;
• receiving, via radio resource control signalling, information indicating the pre-determined number of times;
• combining the pre-determined number of first symbol streams into a second symbol stream, wherein the second symbol stream is modulated in a modulation manner with a modulation order higher than that of each of the first symbol streams;
• and
• demodulating the second symbol stream to generate a demodulated data stream.

A data transmitting device, comprising:

• a modulation apparatus configured to modulate data in a first modulation manner to generate a first symbol stream;
• a decomposing apparatus configured to decompose the first symbol stream into a pre-determined number of second symbol streams, each of which is modulated in a modulation manner with a modulation order lower than that of the first modulation manner;
• a processing apparatus configured to process the pre-determined number of second symbol streams to generate a code-division-multiplexed data stream, wherein the processing apparatus is configured to repeat the pre-determined number of second symbol streams in a pre-determined unit for a pre-determined number of times respectively, to generate a pre-determined number of repeated symbol streams, and perform code division multiplexing on the pre-determined number of repeated symbol streams to generate the code-division-multiplexed data stream;
• and
• a communication apparatus configured to process the code-division-multiplexed data stream to send the processed data stream, wherein
• the communication apparatus is further configured to receive, via radio resource control signalling, information indicating the pre-determined number of times.