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Deep space communication oriented adaptive hybrid repeat method and device thereof

A deep space communication and hybrid retransmission technology, applied in synchronization devices, transmission systems, digital transmission systems, etc., to achieve the effects of fast and accurate phase ambiguity, low latency, and small design complexity

Inactive Publication Date: 2017-09-26
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the problems of transmission efficiency and transmission quality caused by the time-varying channel in the existing deep space communication process. In view of this problem, the present invention designs and provides an adaptive deep space communication Hybrid retransmission method and device

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  • Deep space communication oriented adaptive hybrid repeat method and device thereof
  • Deep space communication oriented adaptive hybrid repeat method and device thereof
  • Deep space communication oriented adaptive hybrid repeat method and device thereof

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Embodiment approach

[0033] Refer to attached figure 1 , its embodiment of the present invention is as follows:

[0034] For the transmitter, the transmission control word extraction module extracts the parameters of the transmitter, and then configures the modulation mode, coding type, frame length and retransmission flag of the transmitter through the subsequent module; the rate control word extracted at the same time is used to configure The transmission rate control module, and then adaptively adjusts the clock of the transmission module, the shaping filter coefficient and the interpolation multiple value. The retransmission control module controls the data or parameter framing of the transmitter according to the extracted retransmission flag, and simultaneously controls and realizes the mode switching between the normal data transmission process and the retransmission process. The data / parameter framing module is used to frame the bit data in accordance with the Proximity-1 protocol standard...

specific Embodiment approach

[0035] Refer to attached figure 1 combined with the attached figure 2 , the specific implementation is as follows:

[0036] The transmission rate control module is mainly used to control the interpolation multiple in the quadrature modulation module, so that the baseband signals at different rates can have the same sampling rate after modulating the intermediate frequency. The extraction module at the receiving end has the function of extracting the signal at a fixed sampling rate to a sampling rate corresponding to a different symbol rate, so as to ensure that the matched filter of the subsequent carrier synchronization module can be adaptively changed according to the change of the rate. Among them, the FFT module mainly works in the single carrier stage of the handshake process, which is used to quickly estimate the frequency offset value of the single carrier, and then send it to the carrier synchronization module to initialize the initial reference value of the carrier ...

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Abstract

The invention discloses a deep space communication oriented hybrid repeat method and a device thereof. The device mainly comprises two key functional modules, namely a rate adapting module and a hybrid repeat module. The deep space communication oriented adaptive hybrid repeat method is characterized in that in a communication process, a transceiver end utilizes a hybrid repeat method in which automatic repeat and convolutional coding after rollback by N frames, thereby improving system transmission quality; and furthermore for aiming at hybrid repeat efficiency reduction in a fixed rate on the condition of relatively low channel quality, thereby adaptively regulating the transmission rate according to the channel condition for obtaining an optimal transmission throughput. The invention provides the designed method in which adaptive rate regulation and hybrid automatic repeating are combined, wherein the method has advantages of settling an influence of a time-varying channel to data transmission performance in a deep space communication process, reducing number of repeats of the system based on high data transmission efficiency, and realizing higher-efficiency and higher-quality data transmission.

Description

technical field [0001] The invention relates to an adaptive hybrid retransmission method, which belongs to the technical field of communication, and particularly relates to an adaptive hybrid retransmission method used for adjacent space communication links under the background of deep space communication. Background technique [0002] For a long time, signal transmission in wireless communication systems is usually affected by various factors such as channel noise, attenuation, and interference, which increases the uncertainty of communication transmission and affects the transmission efficiency and throughput of communication transmission. Therefore, when the communication link transmission is unstable, it is necessary to adopt adaptive transmission technology to dynamically adjust the communication system parameters to ensure the efficiency and quality of information transmission; at the same time, under the premise that the communication link is relatively stable without ...

Claims

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Application Information

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IPC IPC(8): H04L1/00H04L1/06H04L1/16H04L1/18H04L7/00
Inventor 李松王成华朱秋明张小飞刘伟强王杰胡滨王乐
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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