Method and device for multiuser superposition transmission, and method and device for demodulating multiuser information transmission
AssigneeZte Corporation
InventorsZhifeng Yuan, Jianqiang Dai
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Abstract
The embodiments of disclosure disclose a method and device for multiuser superposition transmission and a method and device for demodulating multiuser information transmission. In the method, two bit information streams are respectively modulated into a first complex symbol sequence and a second complex symbol sequence; superposition processing on the first complex symbol sequence and the second complex symbol sequence is performed to generate a third complex symbol sequence, wherein the third complex symbol sequence has a Gray mapping attribute; and a sending signal is formed according to the third complex symbol sequence, and the sending signal is sent to multiple receivers.
Claims18
A method for multiuser superposition transmission, comprising:
- respectively modulating two bit information streams into a first complex symbol sequence and a second complex symbol sequence;
- performing superposition processing on the first complex symbol sequence and the second complex symbol sequence to generate a third complex symbol sequence, wherein the third complex symbol sequence has a Gray mapping attribute, and performing, according to the first complex symbol sequence and the second complex symbol sequence, superposition processing to generate the third complex symbol sequence comprises:
- changing, according to the first complex symbol sequence, an argument of the second complex symbol sequence in a complex plane and keeping an amplitude unchanged to acquire a changed symbol sequence;
- and performing superposition processing on the first complex symbol sequence and the changed symbol sequence to generate the third complex symbol sequence;
- and
- forming a sending signal according to the third complex symbol sequence, and sending the sending signal to multiple receivers.
A method for demodulating multiuser information transmission, comprising:
- receiving a sending signal from a sender, wherein the sending signal is formed according to a third complex symbol sequence, the third complex symbol sequence is generated on the sender in a following manner:
- two bit information streams are respectively modulated into a first complex symbol sequence and a second complex symbol sequence, a changed symbol sequence is acquired by changing, according to the first complex symbol sequence, an argument of the second complex symbol sequence in a complex plane and keeping an amplitude unchanged, -and superposition processing is performed on the first complex symbol sequence and the changed complex symbol sequence to generate the third complex symbol sequence, and the third complex symbol sequence has a Gray mapping attribute;
- and
- demodulating the received signal according to a demodulation manner corresponding to a type of a user.
A device for multiuser superposition transmission, comprising:
- a modulation component, arranged to respectively modulate two bit information streams into a first complex symbol sequence and a second complex symbol sequence;
- a superposition component, arranged to perform superposition processing on the first complex symbol sequence and the second complex symbol sequence to generate a third complex symbol sequence, wherein the third complex symbol sequence has a Gray mapping attribute, and the superposition component comprises:
- an acquisition element, arranged to change, according to the first complex symbol sequence, an argument of the second complex symbol sequence in a complex plane and keep an amplitude unchanged to acquire a changed symbol sequence;
- and a superposition element, arranged to perform superposition processing on the first complex symbol sequence and the changed symbol sequence to generate the third complex symbol sequence;
- and
- a sending component, arranged to form a sending signal according to the third complex symbol sequence, and send the sending signal to multiple receivers.
A demodulation device for multiuser information transmission, comprising:
- a receiving component, arranged to receive a sending signal from a sender, wherein the sending signal is formed according to a third complex symbol sequence, the third complex symbol sequence is generated on the sender in a following manner:
- two bit information streams are respectively modulated into a first complex symbol sequence and a second complex symbol sequence, a changed symbol sequence is acquired by changing, according to the first complex symbol sequence, an argument of the second complex symbol sequence in a complex plane and keeping an amplitude unchanged, and superposition processing is performed on the first complex symbol sequence and the changed complex symbol sequence to generate the third complex symbol sequence, and the third complex symbol sequence has a Gray mapping attribute;
- and
- a demodulation component, arranged to demodulate the received signal according to a demodulation manner corresponding to a type of a user.
Dependencies are inferred from the claim text.