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Method, device and system for transmitting and receiving signal in feedback system

A feedback system and signal technology, applied in transmission systems, modulated carrier systems, digital transmission systems, etc., can solve problems such as transmission scenarios that cannot be applied to the transmitter of the feedback system, achieve reduced complexity, improve capacity performance, and reduce energy consumption Effect

Active Publication Date: 2012-10-03
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the inventor found in the research that after the linear adjustment of the antenna mixing matrix W, when the signal originally sent by the transmitting antenna 2 is transferred to the transmitting antenna 3, and the signal originally sent by the transmitting antenna 3 is transferred to the transmitting antenna 2 When , it is necessary to exchange information between the transmitting antennas. However, in the transmission scenario where the transmitting antennas are provided by different transmitting ends, the feedback method based on the antenna mixing matrix in the prior art cannot be applied to the transmission with multiple transmitting ends in the feedback system Scenes

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  • Method, device and system for transmitting and receiving signal in feedback system
  • Method, device and system for transmitting and receiving signal in feedback system
  • Method, device and system for transmitting and receiving signal in feedback system

Examples

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no. 1 example

[0025] For the above-mentioned closed-loop DSTTD system, the present invention provides a first embodiment of a signal receiving method in a feedback system, please refer to figure 2 , including the following steps:

[0026] Step 201: receiving a signal sent by the sending antenna;

[0027] In this step, the signal sent by the transmitting antenna is expressed in the form of a DSTTD code word matrix as:

[0028] C = c 1 c 2 - c 2 * c 1 * ...

no. 2 example

[0060] Corresponding to the receiving method, the present invention provides a second embodiment of a signal sending method in a feedback system, please refer to Figure 5 , including the following steps:

[0061] Step 501: Select a transmitting antenna that needs to be pre-processed with the optimal phase angle from the total 4 antennas of the two relay stations, and inform the receiving end of the selection result;

[0062] Wherein, the receiving end may also select the transmit antenna that needs to be pre-processed with the optimal phase angle, and inform the relay station to which the selected transmit antenna belongs to the selection result.

[0063] Step 502: the two relay stations respectively receive different dual-symbol signals sent by the base station;

[0064] Step 503: the two relay stations respectively perform space-time transmission diversity coding on the double symbols;

[0065] Step 504: Perform phase rotation on the symbol signal on the pre-selected tran...

no. 3 example

[0069] Corresponding to the receiving method, the present invention provides a third embodiment of a signal sending method in a feedback system, please refer to Figure 7 , including the following steps:

[0070] Step 701: Select a transmitting antenna that needs to be pre-processed with the optimal phase angle from the total 4 antennas of the two terminals, and inform the receiving end of the selection result;

[0071] Wherein, the receiving end may also select the transmit antenna that needs to be pre-processed with the optimal phase angle, and inform the terminal to which the selected transmit antenna belongs of the selection result.

[0072] Step 702: Perform space-time transmission diversity encoding on the symbol signals output from the two modulators;

[0073] Step 703: Perform phase rotation on the symbol signal on the pre-selected transmitting antenna according to the optimal phase angle fed back by the receiving end;

[0074] Step 704: Send the signal to the receiv...

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Abstract

The invention discloses a method, a device and a system for transmission and reception in a feedback system. The reception method comprises the following steps: receiving a signal transmitted by a transmission antenna and obtaining a receiving signal; according to a channel gain coefficient matrix in the receiving signal, obtaining an optimal phase angle maximizing the capacity of the feedback system by calculation; and taking the optimal phase angle as a feedback and transmitting to a transmission terminal. The transmission method comprises the following steps: carrying out double-time-spacetransmission diversity DSTTD coding on a signal to be transmitted, obtaining a coding signal, receiving a feedback transmitted by a receiving terminal and obtaining a rotation phase angle from the feedback; according to the rotation phase angle, carrying out phase rotation on a coding signal on a transmission antenna which is selected in advance; and transmitting the signal on which the phase rotation is carried out by the transmission antenna. The invention adapts to a transmission scene with a plurality of transmission terminals in the feedback system.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a signal sending and receiving method, device and system in a feedback system. Background technique [0002] With the rapid development of multimedia services and data services in wireless communication systems, future mobile communications have higher requirements for the rate and quality of signal transmission, and traditional wireless communication systems have been unable to meet this new demand. MIMO (Multi-Input Multi-Output) technology can make full use of space resources and improve the data transmission rate and transmission link quality of the system. DSTTD (Double space-time transmit diversity) technology can obtain two types of gains of MIMO technology at the same time: space diversity and space division multiplexing. At the same time, the closed-loop transmission technology based on feedback information can further improve the performance of DSTTD. sy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/06H04L1/16H04L27/00H04B7/06
Inventor 张建伟
Owner HUAWEI TECH CO LTD