Single carrier frequency domain balanced transmission system for remote unmanned aerial vehicle image transmission

Abstract

The invention belongs to the field of unmanned aerial vehicle wireless communication, and particularly relates to a single-carrier frequency domain balanced transmission system for remote unmanned aerial vehicle image transmission, and the system comprises a transmitting end disposed on an unmanned aerial vehicle and a receiving end disposed on the ground, wherein the transmitting end is used for coding and modulating a collected binary image transmission signal to obtain a symbol sequence, blocking the symbol sequence, inserting a unique word as a cyclic prefix, packaging the symbol sequence into a data frame in a self-defined format, and transmitting the data frame; and the receiving end is used for receiving the data frame transmitted through the channel, performing time-frequency synchronization and frame decoding processing, performing FFT (Fast Fourier Transform), frequency domain equalization and IFFT (Inverse Fast Fourier Transform) after removing a cyclic prefix, and then performing demodulation and decoding processing to obtain an information sequence transmitted by an image of the unmanned aerial vehicle. According to the data frame structure in the self-defined format, the length of effective data is increased, and the transmission efficiency of the effective data is greatly improved.

Description

Technical field [0001] The present invention belongs to the field of drone wireless communication, and more particularly to a single carrier frequency domain equalization transmission system for remote drone graphics. Background technique [0002] The drone communication system belongs to a typical wireless communication system. When transmission, the communication distance is far, the terrain is complex, the mobile speed of the mobile station can cause serious multipath fading, thus generating the performance of the wireless communication system. Larger impact reduces the reliability of drone communication. The commonly used methods of counterming multipath fading mainly have OFDM, SC-TDE, SC-FDE. The SC-FDE system has the advantage of single carrier and orthogonal frequency division multiplexing (OFDM), while avoiding the symbol crosstalk while avoiding multi-carrier transmission technology peaks (PARA) high, sensitivity to frequencies, etc. Disadvantages. [0003] The data in ...

AI Technical Summary

Problems solved by technology

[0010] For the existing single carrier equalization (SC-FDE) technology in the existing burst transmission mode, the transmission data frame bandwidth utilization rate is low, and the bandwidth cannot be taken into account Insufficient utilization and wireless communication system performance, a new frame structure is proposed, which increases the length of effective data, improves bandwidth utilization and system transmission rate

Images