Log in

Relevant bibliographies by topics / Barker sequences / Journal articles

To see the other types of publications on this topic, follow the link: Barker sequences.

Journal articles on the topic 'Barker sequences'

Author: Grafiati

Published: 30 May 2022

Last updated: 31 July 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Barker sequences.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Bömer, L., and M. Antweiler. "Polyphase Barker sequences." Electronics Letters 25, no. 23 (1989): 1577. http://dx.doi.org/10.1049/el:19891059.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Banket, V., and S. Manakov. "COMPOSITE WALSCH-BARKER SEQUENCES." Proceedings of the O.S. Popov ОNAT 1, no. 1 (2018): 12–21. http://dx.doi.org/10.33243/2518-7139-2018-1-1-12-21.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Tsmots, I. G., O. Ya Riznyk, Yu I. Budaretskyi, and Oliinyk M. Ya Oliinyk M. Ya. "SYNTHESIS OF BARKER-LIKE SEQUENCES WITH ADAPTATION TO THE SIZE OF THE INTERFERENCE." Ukrainian Journal of Information Technology 3, no. 1 (2021): 91–98. http://dx.doi.org/10.23939/ujit2021.03.091.

Full text

Abstract:

The method of synthesis of noise-resistant barker-like code sequences with the use of ideal ring bundles has been improved. The method for fast finding of such noise-like noise-resistant code sequences, which are able to find and correct errors in accordance with the length of the obtained code sequence, has been improved. An algorithm is implemented to quickly find such noise-resistant barker-like code sequences that are able to find and correct errors in accordance with the length of the obtained code sequence. A simulation model of noise-tolerant barker-like coding with the use of ideal rin

APA, Harvard, Vancouver, ISO, and other styles

4

Zhang, N., and S. W. Golomb. "Sixty-phase generalized Barker sequences." IEEE Transactions on Information Theory 35, no. 4 (1989): 911–12. http://dx.doi.org/10.1109/18.32175.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Ning Chang and S. W. Golomb. "On n-phase Barker sequences." IEEE Transactions on Information Theory 40, no. 4 (1994): 1251–53. http://dx.doi.org/10.1109/18.335942.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Ning Chang and S. W. Golomb. "7200-phase generalized Barker sequences." IEEE Transactions on Information Theory 42, no. 4 (1996): 1236–38. http://dx.doi.org/10.1109/18.508847.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Mossinghoff, Michael J. "Wieferich pairs and Barker sequences." Designs, Codes and Cryptography 53, no. 3 (2009): 149–63. http://dx.doi.org/10.1007/s10623-009-9301-3.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Schmidt, Kai-Uwe, and Jürgen Willms. "Barker sequences of odd length." Designs, Codes and Cryptography 80, no. 2 (2015): 409–14. http://dx.doi.org/10.1007/s10623-015-0104-4.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Borwein, Peter, Erich Kaltofen, and Michael J. Mossinghoff. "Irreducible polynomials and barker sequences." ACM Communications in Computer Algebra 41, no. 4 (2007): 118–21. http://dx.doi.org/10.1145/1358183.1358185.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Tsmots, I. G., O. Ya Riznyk, B. I. Balych, and Ch Z. Lvovskij. "The method and simulation model for the synthesis of barker-like code sequences." Ukrainian Journal of Information Technology 3, no. 2 (2021): 45–50. http://dx.doi.org/10.23939/ujit2021.02.045.

Full text

Abstract:

Noise immunity is one of the essential characteristics of modern wireless data reception/transmission systems. In wireless systems such as Wi-Fi, HiperLan, or Bluetooth, the signal is propagated by electromagnetic oscillations in the environment. However, unlike wiring systems, these oscillations are unprotected from external influences. Noise immunity is one of the essential characteristics of modern wireless data reception/transmission systems. Moreover, if several wireless systems work close enough to each other, there is a possibility of overlapping waves, which will damage the information

APA, Harvard, Vancouver, ISO, and other styles

11

Borwein, Peter, and Michael J. Mossinghoff. "Wieferich pairs and Barker sequences, II." LMS Journal of Computation and Mathematics 17, no. 1 (2014): 24–32. http://dx.doi.org/10.1112/s1461157013000223.

Full text

Abstract:

AbstractWe show that if a Barker sequence of length $n>13$ exists, then either n $=$ 3 979 201 339 721 749 133 016 171 583 224 100, or $n > 4\cdot 10^{33}$. This improves the lower bound on the length of a long Barker sequence by a factor of nearly $2000$. We also obtain eighteen additional integers $n<10^{50}$ that cannot be ruled out as the length of a Barker sequence, and find more than 237 000 additional candidates $n<10^{100}$. These results are obtained by completing extensive searches for Wieferich prime pairs and using them, together with a number of arithmetic restrictions

APA, Harvard, Vancouver, ISO, and other styles

12

BORWEIN, PETER, and TAMÁS ERDÉLYI. "A NOTE ON BARKER POLYNOMIALS." International Journal of Number Theory 09, no. 03 (2013): 759–67. http://dx.doi.org/10.1142/s179304211250159x.

Full text

Abstract:

We call the polynomial [Formula: see text] a Barker polynomial of degree n-1 if each aj ∈{-1, 1} and [Formula: see text] Properties of Barker polynomials were studied by Turyn and Storer thoroughly in the early sixties, and by Saffari in the late eighties. In the last few years P. Borwein and his collaborators revived interest in the study of Barker polynomials (Barker codes, Barker sequences). In this paper we give a new proof of the fact that there is no Barker polynomial of even degree greater than 12, and hence Barker sequences of odd length greater than 13 do not exist. This is intimately

APA, Harvard, Vancouver, ISO, and other styles

13

Maksymov, Volodymyr, Viktor Gatturov, and Igor Khrapovytsky. "NEW COMPOSITE BARKER CODES, GOLD CODES AND KASAMISEQUENCES IN BROADBAND SIGNAL SYNCHRONIZATION SYSTEMS." Information and Telecommunication Sciences, no. 1 (June 30, 2022): 14–21. https://doi.org/10.20535/2411-2976.12022.14-21.

Full text

Abstract:

Background. Currently, noise-like signals (NLS) are widely used, which provide high noise immunity of broadband communication systems (BSS) when transmitting confidential information in an open radio channel, especially in emergency situations. Increasing the efficiency of the NSS is possible with the use of more advanced code structures, in particular, new methods for constructing Barker code sequences used in wireless communication systems with direct sequence spread spectrum technology. Objective. The aim of the work is to study new composite codes of Barker, Gold and Kasami as synchronizat

APA, Harvard, Vancouver, ISO, and other styles

14

Nenashev, V. A., A. M. Sergeev, and E. A. Kapranova. "Research and Analysis of Autocorrelation Functions of Code Sequences Formed on the Basis of Monocyclic Quasi-Orthogonal Matrices." Information and Control Systems, no. 4 (September 23, 2018): 9–14. http://dx.doi.org/10.31799/1684-8853-2018-4-9-14.

Full text

Abstract:

Introduction: Barker codes representing binary sequences (codes) of finite lengths 2, 3, 4, 5, 7, 11 and 13 are widely used in solving the problem of increasing the noise immunity of radar channels. However, the code sequences for n > 13 are unknown. Sequences derived from quasi-orthogonal Mersenne matrices also have not been used for these purposes.Purpose: Studying the ways to compress a complex modulated signal by Mersenne sequences obtained from the first rows of a monocyclic quasi-orthogonal Mersenne matrix, as an alternative to Barker codes.Results:It has been found out that the chara

APA, Harvard, Vancouver, ISO, and other styles

15

Dvornikov, S., S. Dvornikov, and E. Markov. "Modified Pulse Sequences Based on Barker Codes." Proceedings of Telecommunication Universities 8, no. 1 (2022): 8–14. http://dx.doi.org/10.31854/1813-324x-2022-8-1-8-14.

Full text

Abstract:

The article considers an approach to the modification of manipulative impulse sequences based on Barker codes. It is proposed to change the structure of the encoded pulses by the duration of the elementary message, taking into account the change in the duty cycle of their repetition while maintaining the total average energy. Numerical relations are obtained that determine the spectral and temporal parameters for a seven-element pulse sequence, with an increase in the pulse repetition rate by two and three times. Numerical values are calculated that determine the ratio of the duration of the p

APA, Harvard, Vancouver, ISO, and other styles

16

Sergeev, M. B., V. A. Nenashev, and A. M. Sergeev. "Nested code sequences of Barker — Mersenne — Raghavarao." Information and Control Systems, no. 3 (June 21, 2019): 71–81. http://dx.doi.org/10.31799/1684-8853-2019-3-71-81.

Full text

Abstract:

Introduction: The problem of noise-free encoding for an open radio channel is of great importance for data transfer. The results presented in this paper are aimed at stimulating scientific interest in new codes and bases derived from quasi-orthogonal matrices, as a basis for the revision of signal processing algorithms.Purpose: Search for new code sequences as combinations of codes formed from the rows of Mersenne and Raghavarao quasi-orthogonal matrices, as well as complex and more efficient Barker — Mersenne — Raghavarao codes.Results: We studied nested code sequences derived from the rows o

APA, Harvard, Vancouver, ISO, and other styles

17

Friese, M. "Polyphase Barker sequences up to length 36." IEEE Transactions on Information Theory 42, no. 4 (1996): 1248–50. http://dx.doi.org/10.1109/18.508850.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

Zhang, N., and S. W. Golomb. "On the crosscorrelation of generalized Barker sequences." IEEE Transactions on Information Theory 36, no. 6 (1990): 1478–80. http://dx.doi.org/10.1109/18.59952.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

Elia, Michele. "On the non-existence of barker sequences." Combinatorica 6, no. 3 (1986): 275–78. http://dx.doi.org/10.1007/bf02579388.

Full text

APA, Harvard, Vancouver, ISO, and other styles

20

Friese, M., and H. Zottmann. "Polyphase Barker sequences up to length 31." Electronics Letters 30, no. 23 (1994): 1930–31. http://dx.doi.org/10.1049/el:19941306.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

Nenashev, Vadim A., Alexander R. Bestugin, Irina A. Kirshina, and Sergey A. Nenashev. "METHOD FOR SEARCHING MODIFIED BARKER CODE SEQUENCES." T-Comm 17, no. 12 (2023): 15–21. http://dx.doi.org/10.36724/2072-8735-2023-17-12-15-21.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

Gómez-Sarabia, Cristina M., and Jorge Ojeda-Castañeda. "Foucault–Barker Mask: Nonconventional Schlieren Technique." Optics 6, no. 2 (2025): 23. https://doi.org/10.3390/opt6020023.

Full text

Abstract:

We present a theoretical framework for designing optical masks, which are useful for implementing nonconventional Schlieren techniques. We revisit the use of effective transfer functions, which emphasize the role of symmetries in the design of coded masks. The proposed technique implements an optical autocorrelation of a mask, which is coded with the Barker sequences. For the same purpose, one can also use masks coded with the pseudorandom sequences. For the sake of completeness, we link our deterministic theoretical framework with a simple statistical model. The proposed technique may be usef

APA, Harvard, Vancouver, ISO, and other styles

23

Kamenev, S. I. "Acoustic control command transmission system on underwater vehicles using Barker sequences." Podvodnye issledovaniia i robototehnika 51, no. 1 (2025): 84–89. https://doi.org/10.37102/1992-4429_2025_51_01_08.

Full text

Abstract:

The article considers a variant of the underwater communication system using phase-manipulated signals in the form of a 13-position Barker sequence. The system was developed in the Department of Technical Means of Ocean Research at the Pacific Oceanological Institute Far Eastern Branch of the Russian Academy of Sciences. The results of a model experiment on the joint application of signals based on Barker sequences with different carrier frequencies are discussed. A method of separating these signals is proposed to ensure reliable transmission of control commands to underwater vehicles (underw

APA, Harvard, Vancouver, ISO, and other styles

24

Jedwab, Jonathan, and Matthew G. Parker. "A construction of binary Golay sequence pairs from odd-length Barker sequences." Journal of Combinatorial Designs 17, no. 6 (2009): 478–91. http://dx.doi.org/10.1002/jcd.20222.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Zhang, N., and S. W. Golomb. "A limit theorem for n-phase Barker sequences." IEEE Transactions on Information Theory 36, no. 4 (1990): 863–68. http://dx.doi.org/10.1109/18.53747.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

Mow, W. H. "General limit theorem for n phase barker sequences." Electronics Letters 32, no. 15 (1996): 1364. http://dx.doi.org/10.1049/el:19960944.

Full text

APA, Harvard, Vancouver, ISO, and other styles

27

Holubnychyi, A. G. "Barker-like systems of sequences and their processing." Технология и конструирование в электронной аппаратуре, no. 6 (December 2013): 19–24. http://dx.doi.org/10.15222/tkea2013.6.19.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

Jedwab, Jonathan, and Sheelagh Lloyd. "A note on the nonexistence of Barker sequences." Designs, Codes and Cryptography 2, no. 1 (1992): 93–97. http://dx.doi.org/10.1007/bf00124212.

Full text

APA, Harvard, Vancouver, ISO, and other styles

29

Maksimov, V., V. Noskov, and I. Khrapovitsky. "NEW COMPOSITE CODES OF BARKER AND CODES GOLD IN THE SYNCHRONIZATION SYSTEM OF BROADBAND SIGNALS." Scientific heritage, no. 94 (August 8, 2022): 110–20. https://doi.org/10.5281/zenodo.6973494.

Full text

Abstract:

Background. Currently, noise-like signals (NLS) are widely used, which provide high noise immunity of broadband communication systems (BSS) when transmitting confidential information in an open radio channel, especially in emergency situations. Increasing the efficiency of the NLS is possible with the use of more advanced code structures, in particular, new methods for constructing Barker code sequences used in wireless communication systems with direct sequence spread spectrum technology. Objective. The aim of the work is to study new composite codes of Barker and codes Gold as synchronizatio

APA, Harvard, Vancouver, ISO, and other styles

30

Borwein, Peter, Stephen Choi, and Jonas Jankauskas. "On a class of polynomials related to Barker sequences." Proceedings of the American Mathematical Society 140, no. 8 (2012): 2613–25. http://dx.doi.org/10.1090/s0002-9939-2011-11114-6.

Full text

APA, Harvard, Vancouver, ISO, and other styles

31

Barker, Stephen C., Samuael Kelava, Allen C. G. Heath, et al. "A new subgenus, Australixodes n. subgen. (Acari: Ixodidae), for the kiwi tick, Ixodes anatis Chilton, 1904, and validation of the subgenus Coxixodes Schulze, 1941 with a phylogeny of 16 of the 22 subgenera of Ixodes Latreille, 1795 from entire mitochondrial genome sequences." Zootaxa 5325, no. 4 (2023): 529–40. https://doi.org/10.11646/zootaxa.5325.4.4.

Full text

Abstract:

Barker, Stephen C., Kelava, Samuael, Heath, Allen C. G., Seeman, Owen D., Apanaskevich, Dmitry A., Mans, Ben J., Shao, Renfu, Gofton, Alexander W., Teo, Ernest J. M., Byrne, Andrew F., Ito, Takuya, Tan, Craig J., Barker, Dayana, Nakao, Ryo (2023): A new subgenus, Australixodes n. subgen. (Acari: Ixodidae), for the kiwi tick, Ixodes anatis Chilton, 1904, and validation of the subgenus Coxixodes Schulze, 1941 with a phylogeny of 16 of the 22 subgenera of Ixodes Latreille, 1795 from entire mitochondrial genome sequences. Zootaxa 5325 (4): 529-540, DOI: 10.11646/zootaxa.5325.4.4, URL: http://dx.do

APA, Harvard, Vancouver, ISO, and other styles

32

Han, Sijia, Wei Guo, Peng Liu, et al. "Chaotic Coding for Interference Suppression of Digital Ionosonde." Remote Sensing 15, no. 15 (2023): 3747. http://dx.doi.org/10.3390/rs15153747.

Full text

Abstract:

External interference in ionospheric sounding seriously degrades the quality of echo signals and data; thus, it should be eliminated. This paper presents a method for suppressing interference using chaotic coding with a set of Bernoulli map sequences; compared with other commonly used coding methods such as Barker code, complementary code, and Barker-like codes, through simulation, the ambiguity function (AF) of Bernoulli map codes has better performance in terms of peak sidelobe level (PSL), integral sidelobe ratio (ISL), noise suppression (NS), and signal-to-noise ratio (SNR). Experimental t

APA, Harvard, Vancouver, ISO, and other styles

33

Brenner, A. R. "Polyphase Barker sequences up to length 45 with small alphabets." Electronics Letters 34, no. 16 (1998): 1576. http://dx.doi.org/10.1049/el:19981126.

Full text

APA, Harvard, Vancouver, ISO, and other styles

34

HO, K. M. "Searching for the Best Biphase and Quadriphase Quasi-Barker Sequences." IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E89-A, no. 9 (2006): 2341–44. http://dx.doi.org/10.1093/ietfec/e89-a.9.2341.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Banket, Victor, and Sergei Manakov. "INCREASING THE SPECIFIC RATE OF CONTINUOUS PHASE MODULATION SIGNALS." Informatyka Automatyka Pomiary w Gospodarce i Ochronie Środowiska 9, no. 1 (2019): 57–60. http://dx.doi.org/10.5604/01.3001.0013.0927.

Full text

Abstract:

A method has been developed for increasing the specific rate of frequency modulation signals with a continuous phase based on the use of the properties of composite Walsh-Barker sequences. The proposed method is applicable for multi-position signals. Simultaneously, the tasks of synchronization and registration of processing results are solved. The increase in the efficiency of digital signal transmission systems is theoretically justified.

APA, Harvard, Vancouver, ISO, and other styles

36

Дёмко, А. И., and Е. Г. Алмазова. "Assessment of minimum achievable sidelobes level of ambiguity function for radio pulse sequences." Proceedings in Cybernetics 23, no. 3 (2024): 96–102. https://doi.org/10.35266/1999-7604-2024-3-11.

Full text

Abstract:

The wide usage of complex signals in radiolocation and communication determines the relevance of synthesizing, researching, and optimizing such signals. This article aims to derive calculation formulas for estimating the minimum limit of the achievable level of sidelobes of the zero section for the ambiguity function of discretely encoded radio pulse sequences. The introduction of the optimality coeffi cient provides a measure of the excess of the sidelobe level above the potentially achievable minimum. Radio pulse sequences based on Barker codes are shown to be optimal according to the criter

APA, Harvard, Vancouver, ISO, and other styles

37

Borwein, Peter, Stephen Choi, and Jonas Jankauskas. "Extremal Mahler measures and $L_s$ norms of polynomials related to Barker sequences." Proceedings of the American Mathematical Society 141, no. 8 (2013): 2653–63. http://dx.doi.org/10.1090/s0002-9939-2013-11545-5.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

Holubnychyi, Oleksii H. "Linear Structures of Correlation Function of Odd-Length Generalized Binary Barker Sequences." Microsystems, Electronics and Acoustics 24, no. 1 (2019): 21–28. http://dx.doi.org/10.20535/2523-4455.2019.24.1.158203.

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

Fedorov, V. K., E. G. Balenko, S. V. Dvornikov, and O. S. Lauta. "Application of Broadband Signals to Increase Interference Immunity in Channels with Inter-Symbol Interference." Journal of Physics: Conference Series 2096, no. 1 (2021): 012046. http://dx.doi.org/10.1088/1742-6596/2096/1/012046.

Full text

Abstract:

Abstract Proposals for improving the noise immunity of receiving phase-shift keying signals in the conditions of inter-symbol interference caused by fading in the channel are presented. The use of Barker sequences for the expansion of modulating information pulses has been substantiated. The results of evaluating the noise immunity of Rice fading channels at various ratios of the effective voltages of the regular and diffuse signal components are presented. Proposals for the practical application of the results obtained are formulated.

APA, Harvard, Vancouver, ISO, and other styles

40

Tang, Qing-Ju, Hong-Ru Bu, Zhuo-Yan Gu, et al. "Experimental study on infrared thermal wave detection of honeycomb sandwich structure defects by using barker code excitation." Thermal Science 29, no. 2 Part B (2025): 1273–79. https://doi.org/10.2298/tsci2502273t.

Full text

Abstract:

The paper describes a thermal testing system implementing Barker code thermal wave excitation accurately detect defects in GFRP/NOMEX honeycomb sandwich structures. Influence of defect parameters on detection efficiency is explored. Four algorithms, namely, PCA, PPT, THD, and TW-PCA, have been used to process infrared image sequences. The obtained results show that all algorithms suppress background noise to a certain degree, but the TW-PCA technique has proven to be more effective providing the higher both signal-to-noise ratio and information entropy.

APA, Harvard, Vancouver, ISO, and other styles

41

Chan, C. K. "Generalised Barker-like PN sequences for quasisynchronous spread-spectrum multiple-access communication systems." IEE Proceedings - Communications 142, no. 2 (1995): 91. http://dx.doi.org/10.1049/ip-com:19951854.

Full text

APA, Harvard, Vancouver, ISO, and other styles

42

Yu, Gang. "A Note on Barker Sequences and the L 1 -norm of Littlewood Polynomials." Comptes Rendus. Mathématique 361, G3 (2023): 609–16. http://dx.doi.org/10.5802/crmath.428.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

Ukil, Abhisek. "Low autocorrelation binary sequences: Number theory-based analysis for minimum energy level, Barker codes." Digital Signal Processing 20, no. 2 (2010): 483–95. http://dx.doi.org/10.1016/j.dsp.2009.08.003.

Full text

APA, Harvard, Vancouver, ISO, and other styles

44

Rosli, Siti Julia, Hasliza Rahim, Ruzelita Ngadiran, K. N. Abdul Rani, Muhammad Imran Ahmad, and Wee Fwen Hoon. "Design of Binary Coded Pulse Trains with Good Autocorrelation Properties for Radar Communications." MATEC Web of Conferences 150 (2018): 06016. http://dx.doi.org/10.1051/matecconf/201815006016.

Full text

Abstract:

Finite length of sequences that are modulated both in phase and amplitude and have an ideal autocorrelation function (ACF) consisting of merely a pulse have many applications in control and communication systems. They are widely applied in control and communication systems, such as in pulse compression systems for radar and deep-space ranging problems [1-5]. In radar design, the important part is to choose a waveform, which is suitable to be transmitted because the waveform controls resolution in clutter performance. In addition, it can solve a general signal problem particularly related to th

APA, Harvard, Vancouver, ISO, and other styles

45

Kadhim, Hassan Kaittan, and Jasim Mohammed Samir. "Implementing and designing a secure information system based on the DSSS gold sequence using MATLAB." Bulletin of Electrical Engineering and Informatics 10, no. 3 (2021): pp. 1455~1463. https://doi.org/10.11591/eei.v10i3.2446.

Full text

Abstract:

During study of directly spread spectrum systems, noted that this system uses many types of code to spread data through communication process. There are different types of code sequences available with good correlation properties, they often use pesudo sequence for spreading which is to be less efficient in protecting information from the breaches that attack the communications systems from penetration. In this article gold sequence will use, which is consider better and more complex than the rest of the code sequence (pseudo-noise (PN) sequence, barker code, hadamard code, and others) in term

APA, Harvard, Vancouver, ISO, and other styles

46

Didkowsky, R. M., A. V. Vovchenko, and N. I. Bokla. "Symbol timing synchronization with the usage of Barker sequences in communication systems utilizing stochastic signals." Automatic Control and Computer Sciences 47, no. 3 (2013): 165–72. http://dx.doi.org/10.3103/s0146411613030048.

Full text

APA, Harvard, Vancouver, ISO, and other styles

47

Sadchenko, A. V., O. A. Kushnirenko, A. G. Yurkevych, and V. S. Sevastianov. "Study of the corrective ability of sync codes for the matched processing decoder." Технология и конструирование в электронной аппаратуре, no. 5-6 (2018): 17–23. http://dx.doi.org/10.15222/tkea2018.5-6.17.

Full text

Abstract:

Increase of the operation reliability of the frame synchronization schemes of communication systems affected by interferences might be achieved by using sync sequences optimal according to the minimax criterion and having the best ratio of the maximum side-lobe level to the main peak of the non-periodic autocorrelation function. Obviously, the longer the minimax sequence, the higher its correction ability. However, with the increase in the length of the sync code, a conflict arises between the corrective ability and the speed of data transfer. This is caused by the decrease in the duration of

APA, Harvard, Vancouver, ISO, and other styles

48

Schäfer, Marius, Hendrik Theado, Michael M. Becker, and Sarah C. L. Fischer. "Optimization of the Unambiguity of Cross-Correlated Ultrasonic Signals through Coded Excitation Sequences for Robust Time-of-Flight Measurements." Signals 2, no. 2 (2021): 366–77. http://dx.doi.org/10.3390/signals2020023.

Full text

Abstract:

The cross-correlation function (CCF) is an established technique to calculate time-of-flight for ultrasonic signals. However, the quality of the CCF depends on the shape of the input signals. In many use cases, the CCF can exhibit secondary maxima in the same order of magnitude as the main maximum, making its interpretation less robust against external disturbances. This paper describes an approach to optimize ultrasonic signals for time-of-flight measurements through coded excitation sequences. The main challenge for applying coded excitation sequences to ultrasonic signals is the influence o

APA, Harvard, Vancouver, ISO, and other styles

49

Zellal, Somia, Adda Ali-Pacha, Mohand Lagha, and Mohamed Krim. "Spread Spectrum Data Transmission System for User Unmanned Aerial Vehicles." Transport and Telecommunication Journal 26, no. 2 (2025): 118–32. https://doi.org/10.2478/ttj-2025-0010.

Full text

Abstract:

Abstract In today’s world of unmanned aerial vehicle (UAV) telecommunications, data transmission is both important and delicate. Various organizations have used special techniques to ensure reliable transmission and stable communication. At this stage, we propose a method that enhances security and makes the transmission of data and image more resistant to interference and eavesdropping while improving signal reliability; this method is based on the Direct Sequence-Spread Spectrum (DS-SS) technique with a new pseudo-noise PN sequence created by merging chaotic and Barker sequences. MATLAB simu

APA, Harvard, Vancouver, ISO, and other styles

50

Castillo, P., C. Gutiérrez-Gutiérrez, J. E. Palomares-Rius, C. Cantalapiedra Navarrete, and B. B. Landa. "First Report of Root-Knot Nematode Meloidogyne hispanica Infecting Grapevines in Southern Spain." Plant Disease 93, no. 12 (2009): 1353. http://dx.doi.org/10.1094/pdis-93-12-1353b.

Full text

Abstract:

Some commercial vineyards producing the ‘Condado de Huelva’ wine denomination of origin in Almonte, Bonares, and Rociana (Huelva Province), southern Spain, showed general decline in sandy soils in 2009. Disease surveys revealed severe infections of grapevine rootstock Richter 110 feeder roots and heavy soil infestations by a root-knot nematode (Meloidogyne sp.). Infected plants showed a general decline as the only visible aboveground symptom, but when roots were inspected, moderate to small galls on secondary feeder roots were detected. The Meloidogyne sp. population was extracted and quantifi

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!