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High-speed data transmission system based on LDPC and parallel QPSK modulation and implementation method

A technology for high-speed data transmission and implementation method, which is applied in the fields of high-speed data communication transmission, data communication, and parallel high-speed data transmission, and can solve problems such as easy generation of error codes, and achieve the effect of reducing hardware cost and system processing delay.

Inactive Publication Date: 2021-02-12
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

When the baseband data rate is relatively high, the demodulator needs to process higher-speed serial data. If the demodulation algorithm is directly run, the digital chip is required to have relatively rich resources and a relatively high operating clock. Currently, the commonly used digital chip FPGA internal Bit errors are easy to occur when the working clock exceeds 400MHz, and complex demodulation algorithms need to be processed in parallel to meet the requirements of high-speed data transmission

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  • High-speed data transmission system based on LDPC and parallel QPSK modulation and implementation method
  • High-speed data transmission system based on LDPC and parallel QPSK modulation and implementation method
  • High-speed data transmission system based on LDPC and parallel QPSK modulation and implementation method

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0027] The principles and features of the present invention will be described below in conjunction with the accompanying drawings and accompanying tables. The examples given are only used to explain the present invention and are not intended to limit the scope of the present invention.

[0028] Quadrature amplitude modulation has the advantages of high transmission rate, large frequency band utilization, and simple implementation. It is one of the most commonly used modulation methods. However, when the transmission data rate increases, the processing speed required by the hardware will also increase. In terms of improvement, when the internal working clock of the commonly used digital chip FPGA exceeds 400MHz, it is easy to generate bit errors. The higher the working clock, the difficulty of integrated wiring and the higher the cost of hardware. Theref...

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Abstract

The invention provides a high-speed data transmission system based on LDPC and parallel QPSK modulation and an implementation method, which are characterized in that a sending end processes data by aparallel processing method, then performs LDPC coding, parallel QPSK modulation and frequency conversion and then transmits the data; and a receiving end performs frequency conversion and parallel QPSK demodulation on the signal, and sends the output parallel data to an LDPC decoding module to obtain decoded data, and combines the data by an inverse process of sending end grouping to obtain demodulated and decoded received data. According to the invention, the method of solving the transmission processes of encoding, modulating, demodulating, decoding and the like of high-speed signals by utilizing parallel low-speed processing is realized, a hundreds-order large filter which is high in hardware complexity, difficult to realize and high in system time delay is equivalently realized, the system processing time delay is effectively shortened, the hardware cost is reduced, error codes possibly existing in the high-speed signal transmission process are solved, and a technical basis is provided for application of actual airborne systems and the like.

Description

technical field [0001] The invention relates to the field of data communication, in particular to the technical field of high-speed data communication transmission, and is applicable to the technical field of parallel high-speed data transmission. Background technique [0002] With the continuous development of wireless communication, high-speed data links such as aircraft-to-ground communication and UAV communication put forward higher requirements on the power efficiency and bandwidth efficiency of communication system transmitters, which makes the research on high-speed data transmission systems increasingly urgent. In recent years, Unmanned Aerial Vehicle (UAV), referred to as UAV, is small in size and light in weight; good in maneuverability and adaptable; simple in structure and low in cost; Casualties, good concealment and other advantages have been widely used in military and civilian fields, making high-speed data transmission systems such as aircraft-to-ground comm...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04L27/20
CPCH04L1/0009H04L1/0061H04L27/2053
Inventor 杨欣袁瑞琛谢坚王伶汪跃先张兆林韩闯陶明亮粟嘉范一飞邢自健
Owner NORTHWESTERN POLYTECHNICAL UNIV
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