Open AccessImplementation of the asynchronous signals reception method with the direct sequence spread spectrum
Author(s) -
И. В. Егоров,
Д. В. Гайворонский
Publication year - 2020
Publication title -
radiopromyšlennostʹ
Language(s) - English
Resource type - Journals
eISSN - 2541-870X
pISSN - 2413-9599
DOI - 10.21778/2413-9599-2020-30-2-49-54
Subject(s) - asynchronous communication , transmitter , asynchrony (computer programming) , computer science , synchronization (alternating current) , jitter , transmission (telecommunications) , channel (broadcasting) , signal (programming language) , spread spectrum , block (permutation group theory) , electronic engineering , real time computing , telecommunications , mathematics , engineering , geometry , programming language
The physical and logical organization of most existing communication systems provides for additional options (transmission of known preambles, the presence of an additional synchronization channel) that simplify synchronization. At the same time, in the practical implementation of radio communication systems, it is necessary to solve the problems of developing additional synchronization mechanisms that can reduce the time it takes to synchronize to reduce energy consumption and increase channel capacity. Thus, the existing problem of the asynchrony of the generators of physically remote radio stations is relevant. One of the possible solutions is asynchronous signal reception with the direct sequence spread spectrum. It allows converting the original binary signal into a pseudo-random sequence for modulating the carrier. The current article is devoted to the characterization of this method and has the following items presented: the transmitter and receiver block diagram, sufficient to explain the proposed method; methods for compensating for effects arising from the asynchrony of the transmitter and receiver generators. Since synchronization is generated according to the correlation peaks that correspond to the data bits, it is possible to set the frequency of the chips on the transmitter to jitter artificially and supplement the pseudo-random sequence with several random chips, which complicates the unauthorized detection of the transmitted signal.