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

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...

AI Technical Summary

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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