NOISE IMMUNITY OF A SYSTEM WITH PSEUDORANDOM SIGNALS AND REED-MULLER CODE

2013 ◽  
Vol 72 (13) ◽  
pp. 1209-1218
Author(s):  
R. R. Bikkenin ◽  
S. D. Khvorov
Keyword(s):  
Noise Immunity ◽  
Pseudorandom Signals

THE INCREASING OF DATA TRANSFER NOISE IMMUNITY IN DEPARTMENTAL COMMUNICATION SYSTEMS OF SHORT-WAVE RANGE

2018 ◽  
pp. 7-19
Author(s):  
B. G. Shadrin ◽  
◽  
D. E. Zachateyskiy ◽  
V. A. Dvoryanchikov Dvoryanchikov ◽  
◽  
...  
Keyword(s):  
Communication Systems ◽  
Noise Immunity ◽  
Data Transfer ◽  
Short Wave ◽  
Wave Range

POTENTIAL NOISE-IMMUNITY OF COMMUNICATIONS WITH POWER RECEPTION OF THE SHIFT-KEYED NOISE SIGNALS

2014 ◽  
Vol 73 (9) ◽  
pp. 777-791
Author(s):  
Mikhail E. Ilchenko ◽  
T. N. Narytnik ◽  
R. M. Didkovski
Keyword(s):  
Noise Immunity

Studying noise immunity of radio information transmission systems with noise-like phase-shift keyed signals and synchronization delay errors

2019 ◽  
pp. 105-113
Author(s):  
G. N. Maltsev ◽  
A. V. Evteev
Keyword(s):  
Phase Shift ◽  
Information Transmission ◽  
Noise Immunity ◽  
Tracking System ◽  
Tracking Error ◽  
Information Symbol ◽  
Transmission Systems ◽  
Synchronization System ◽  
Correlation Receiver ◽  
Selection Of

Introduction: Radio information transmission systems with noise-like phase-shift keyed signals based on pseudo-random sequences have potential noise immunity provided by accurately tracking the delay of the received signal in the correlation receiver. When working with moving objects, the delay of the received signal varies continuously, and the reception quality for noise-like phase-shifted signals highly depends on the synchronization system operation and on the accuracy of estimating the received signal delay by the tracking system. To ensure the required signal reception quality, it is necessary to provide an informed choice of tracking system parameters, taking into account their effects, which are the random and systematic components of the delay tracking error, on the selected noise immunity indicator.Purpose: Analyzing how the errors in tracking the delay of a received phase-shift keyed signal based on a pseudorandom sequence by the synchronization system of a radio information transmission system can affect the probability of erroneous reception of an information symbol.Results: The calculation method was used to obtain families of dependencies of the probability of erroneous reception of an information symbol on the signal-noise ratio (SNR), and the values of the random and systematic components of the delay tracking error which are normalized to the capture band of the correlation receiver. It has been shown that at a fixed SNR, the values of the random and systematic components of the delay tracking error are critical for the erroneous reception probability. In all the cases discussed, all the dependencies are characterized by a slow change of the erroneous reception probability while the synchronization errors within the area of small SNR have fixed values. As the SNR value grows, the erroneous reception probability rapidly drops. To ensure the specified signal reception quality and the reliability of the selection of information symbols and messages in a radio information transmission system with noise-like phase-manipulated signals, its synchronization system requires a joint selection of the tracking system parameters, taking into account the limitations imposed by the operating conditions and technical implementation features.Practical relevance: The obtained results can be used in noise immunity analysis of radio information transmission systems with noise-like phase-shift keyed signals in a wide range of communication conditions, and in providing technical solutions for synchronization systems ensuring the required quality of signal reception.

On-board converter of signals of inductive sensors of speed IS-1165M1 with increased noise immunity

2017 ◽  
Vol 13 (3) ◽  
pp. 30-38
Author(s):  
Y. B. Gorbatkin ◽  
V. A. Chernyshev ◽  
S. S. Sevostyanov ◽  
A. V. Gladkov
Keyword(s):  
Noise Immunity ◽  
Dynamic Range ◽  
Rocket Engines ◽  
Flight Tests ◽  
Speed Sensor ◽  
Inductive Sensors ◽  
Turbo Pump

The article is devoted to the development of a secondary converter for measuring the speed of turbo-pump aggregates of rocket engines. The principle of the induction speed sensor is considered in the article. A method is proposed for generating output pulses from signals of induction speed sensors, which consists in the preliminary integration of the signals of the speed sensor. This method allows to increase the reliability and accuracy of the formation of signals of induction speed sensors, as well as to increase the noise immunity of the secondary converter and significantly increase the dynamic range of measuring the speed. The data of flight tests of the developed secondary converter are given.

Synthesis of symmetrical cables for infocommunication systems with improved noise immunity characteristics

2018 ◽  
pp. 99-108
Author(s):  
А. B. Semenov ◽  
T. S. Abbasova
Keyword(s):  
Noise Immunity ◽  
Mass Dimension ◽  
Dimensional Parameters ◽  
Improved Characteristics

A synthesis of construction of cables of category 6a for infocommunication systems with improved characteristics of noise immunity is carried out. The parameters of transient pickups and total transient pickups for the proposed cable design are calculated, and the cable diameter of the initial and proposed designs is estimated. The estimation of improvement of mass-dimension parameters of a cable of a proposed design is carried out. It is shown that due to chamber (group) unearthed screening, it is possible to significantly reduce the influence characteristics and the mass-dimensional parameters of the cable.

METHODS OF JAMMING INTERFERENCE

2018 ◽  
pp. 80-84
Author(s):  
A. V. Mazin ◽  
M. Yu. Aliyev
Keyword(s):  
Noise Immunity ◽  
Time Constraints ◽  
Joint Operation ◽  
Directional Diagram ◽  
Main Method ◽  
High Noise ◽  
Time Processing ◽  
Radar Systems ◽  
Interference Signals ◽  
Selection Of

The article investigates the problem of providing high noise immunity radar under the influence of passive and intentional interference. The purpose of radio operation of the radar is to create conditions that would impede the operation of systems and minimize its effectiveness. The main method of radio transmission is still creating (staging) interference. Modern radar systems must solve the tasks in terms of electronic suppression using, including intentional interference and under severe time constraints. It is shown that the most effective way to improve the noise immunity of radar systems designed to operate in multipoint space, including non-stationary, interference is adaptive space-time processing of the received signals, based on the angular selection of targets, due to the formation of zeros in the directional diagram in the direction of interference sources. This problem is solved by determining the accuracy of the direction finding of interference sources and is achieved by the joint operation of the antenna array and multi-channel signal processing devices, namely the separation of interference signals on different receiving channels.

INTEGRATED ASSESSMENT OF STABILITY FUNCTIONING COMPLEX TECHNICAL SYSTEMS IN THE TECHNO AND INFO SPHERE

2018 ◽  
pp. 89-94
Author(s):  
V. A. Minaev ◽  
I. D. Korolev ◽  
V. V. Mukhortov
Keyword(s):  
Integrated Assessment ◽  
Noise Immunity ◽  
Maximum Intensity ◽  
Robotic Systems ◽  
Formal Definition ◽  
Protection Systems ◽  
Computer Attacks ◽  
Complex Technical Systems ◽  
Impact Protection ◽  
Technical Systems

The article deals with the issues of integrated assessment of complex technical systems stability functioning in techno sphere and info sphere. It is shown that the concept of cyber stability, including its components such as cyber reliability, noise immunity and cyber survivability are insufficiently investigated and defined. The formal definition is given and the scale with various gradation of cyber survivability is entered. On the example of robotic systems in form of drones two variants of mathematical models of cyber survivability estimation are considered. The first variant is related to the description of drones functioning in the conditions of computer attacks without impact protection systems. The second variant reflects the functioning of drones under the conditions of impacts in the presence of adaptive combined cybernetic protection system. In both variants, two strategies are considered - with minimal and maximum intensity of effects on the drone. It is concluded that proposed in the paper approach enables to evaluate the integrated stability of complex technical systems in the techno sphere and info sphere at the same time.

Synthesis of pseudorandom signals derived from p-level m sequences

1966 ◽  
Vol 2 (11) ◽  
pp. 428 ◽  
Author(s):  
M. Darnell
Keyword(s):  
Pseudorandom Signals ◽  
M Sequences
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