A transmission method in which frame synchronization code is implied in information code
A technology of frame synchronization code and information code, which is applied in the field of efficient transmission of frame synchronization code and information code, can solve the problems of resource occupation, bandwidth and power resource waste, reduce system throughput and energy efficiency, and achieve improved utilization and optimized Constellation Effects
Active Publication Date: 2021-06-11
NORTHWESTERN POLYTECHNICAL UNIV +1
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[0006] Document 4 "Li Ying. Simulation Analysis of OFDM Synchronization Algorithm Based on Cyclic Prefix [J]. Information Technology Research, 2017, 43(1):29-31." The blind estimation synchronization algorithm of cyclic prefix improves data transmission compared with other algorithms efficiency, but the cyclic prefix also occupies channel resources, and the algorithm implementation is complex
[0007] The existing data-assisted synchronization method and blind cyclic prefix estimation method of inserting special synchronization code groups will lead to waste of bandwidth and power resources, reducing system throughput and energy efficiency
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[0027] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, and the present invention includes but not limited to the following embodiments.
[0028] In order to improve the utilization rate of channel resources, the present invention proposes a transmission method in which a frame synchronization code is implied in an information code, which mainly includes two parts of transmission method design and parameter optimization. The specific technical solution is described as follows:
[0029] For the transmission design, the fixed format of the traditional data frame is changed, and the frame synchronization code sequence is embedded in the modulation and demodulation process. When modulating at the sending end, the amplitude of the signal is modulated by the synchronization code sequence, and then the synchronization code sequence is hidden in the information sequence. When demodulating at the receiving end, the si...
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The invention provides a transmission method in which a frame synchronization code is implicitly embedded in an information code. During modulation at a sending end, a synchronization code sequence is used to modulate the signal amplitude, and then the synchronization code sequence is hidden in the information sequence. When demodulating at the receiving end, the signal corresponding to the synchronization code sequence is extracted from the received signal, and the method of correlation detection is used to realize the frame synchronization of the system. For parameter optimization, the ratio of the peak square to the mean square of the correlation detection is used as the capture basis for frame synchronization, and a system parameter optimization model is established to optimize the bit error rate performance of the system under the premise of ensuring the synchronization performance of the system. The invention releases the channel resource occupied by the frame synchronization code sequence and improves the utilization rate of the channel resource.
Description
technical field [0001] The invention belongs to the technical field of wireless communication, and relates to a method for efficiently transmitting frame synchronization codes and information codes. Background technique [0002] In a digital communication system, especially in a burst communication system, in order to correctly identify the start of a data frame at the receiving end, it is usually necessary to provide the start mark of each frame of data at the sending end, and detect and obtain this mark at the receiving end The process is called frame synchronization. The main function of frame synchronization is to extract the frame header position of each frame in the data stream, and send the framed data to the back-end module for data processing after proper processing as required. There are two types of frame synchronization: start-stop synchronization method and insertion of special synchronization code group method. The start-stop synchronization method is rarely ...
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IPC IPC(8): H04L27/34H04L27/36H04L27/38H04J13/00
CPCH04J13/0025H04L27/345H04L27/36H04L27/38
Inventor 姚如贵吴啟洪左晓亚张远
Owner NORTHWESTERN POLYTECHNICAL UNIV