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Signal relaying method and signal combining method and device

A signal relay and signal technology, applied in radio transmission systems, digital transmission systems, electrical components, etc., can solve the problems of not fully utilizing the degree of freedom of relay stations, not obtaining coding gain, etc.

Active Publication Date: 2010-09-01
CHINA MOBILE COMM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In summary, in the application scenario of improving network capacity, the traditional DF forwarding mechanism does not make full use of the degree of freedom brought by relay station forwarding. space diversity gain, and no additional coding gain

Method used

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  • Signal relaying method and signal combining method and device
  • Signal relaying method and signal combining method and device
  • Signal relaying method and signal combining method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1: A signal relay method is provided.

[0038] see Figure 4 , which is a flow chart of the signal relay method provided in Embodiment 1 of the present invention, and the specific steps include:

[0039] Step S401, receiving and demodulating the signal at the transmitting end, and decoding the demodulated first transmission codeword including the systematic bits and the first part of check bits;

[0040] Step S402, encode the decoded output sequence using the same encoding method as the first transmission codeword to generate a second transmission codeword; the generated second transmission codeword contains the same systematic bits as the first transmission codeword and the second part of check bits;

[0041] Step S403. Modulate the second transmit codeword and forward it to the receiving end.

[0042] The above relay method is suitable for relaying and forwarding the signal sent from the base station to the mobile terminal, and is also suitable for relay...

Embodiment 2

[0048] Embodiment 2: A method for combining signals is provided.

[0049] According to the signal relay method provided in the above-mentioned embodiment 1 of the present invention, embodiment 2 of the present invention provides a corresponding signal combining method, and the specific steps are as follows Figure 5 shown, including:

[0050] Step S501, receiving and demodulating the signal at the transmitting end, and obtaining a demodulated first transmission codeword including systematic bits and the first part of parity bits;

[0051] Step S502, receiving and demodulating the signal forwarded by the relay station, and obtaining a demodulated second transmission codeword including the system bits and the second part of check bits;

[0052] Step S503, merging the systematic bits in the first transmission codeword and the second transmission codeword, and splicing the first part of check bits and the second part of check bits in the first transmission codeword and the second...

Embodiment 3

[0062] Embodiment 3: A relay station is provided.

[0063] According to the signal relay method provided in Embodiment 1 of the present invention, based on the same inventive concept, Embodiment 3 of the present invention provides a relay station, and its structural diagram is as follows Figure 7 shown, including:

[0064] The signal receiving and processing unit 71 is configured to receive and demodulate the signal at the transmitting end, and decode the demodulated first transmission codeword including the systematic bits and the first part of check bits;

[0065] The encoding unit 72 is configured to encode the decoded output sequence using the same encoding method as the first transmission codeword to generate a second transmission codeword; the generated second transmission codeword contains the same system as the first transmission codeword bits and the second part of parity bits;

[0066] The forwarding unit 73 is configured to modulate the second transmit codeword and...

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Abstract

The invention discloses a signal relaying method, a signal combining method and a signal combining device. The signal relaying method comprises the following steps that: a transmitter sends a signal carrying a transmission code word which comprises a system bit and a verification bit; and a relay point adopts a coding mode which is identical with that of the transmitter and selects a verificationbit which is different from that of the transmitter to forward an DF. The signal combining method comprises the following steps of: when signals are combined at a receiver, demodulating a direct signal transmitted by the transmitter and a forwarding signal of the relay point; and combining the system bits in the transmission code words carried by the direct signal and the forwarding signal and jointing the verification bits in the transmission code words carried by the direct signal and the forwarding signal, wherein the combined system bit and the jointed verification bit form a receiving code word. The code rate of the code word after the combination at the receiver is lower than the transmission code rate at the transmitter, and thus, extra coding gain can be obtained.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a signal relay method in the wireless communication process, a signal combining method at a receiving end and a corresponding device. Background technique [0002] The relay technology (Relay) aimed at improving the link capacity and expanding the coverage area of ​​the cell is one of the core technologies of the LTE-Advanced system. The radio signal between the base station (eNB) and the user (UE) is relayed by a relay station (Relay Node, RN), so that the coverage of the eNB can be effectively extended. The relay station amplifies the received signal and forwards it, which can compensate the propagation loss of the wireless signal, increase the power of the received signal of the eNB or UE, and increase the capacity of the wireless link. [0003] According to the different processing of the received signal by the relay station, the relay station can be divided into: repea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/155H04B7/02H04L1/00
Inventor 王竞刘光毅沈晓冬杨宁
Owner CHINA MOBILE COMM GRP CO LTD