Frequency Hopping Sequence Sets With Good Aperiodic Hamming Correlation Properties and Large Family Size

2019 ◽  
Vol 23 (3) ◽  
pp. 394-397 ◽  
Author(s):  
Xing Liu ◽  
Qi Zeng
Keyword(s):  
Family Size ◽  
Large Family ◽  
Frequency Hopping ◽  
Large Family Size ◽  
Frequency Hopping Sequence ◽  
Hamming Correlation ◽  
Correlation Properties

scholarly journals Constructions of optimal low hit zone frequency hopping sequence sets with large family size

2022 ◽  
Vol 0 (0) ◽  
pp. 0
Author(s):  
Xiujie Zhang ◽  
Xianhua Niu ◽  
Xin Tan
Keyword(s):  
Family Size ◽  
Multiple Access ◽  
Large Family ◽  
Multiple Access Interference ◽  
Frequency Hopping ◽  
Practical Applications ◽  
Large Family Size ◽  
Frequency Hopping Sequence ◽  
Low Hit Zone ◽  
Multiple Access System

<p style='text-indent:20px;'>Frequency hopping sequences with low hit zone is significant for application in quasi synchronous multiple-access systems. In this paper, we obtained two constructions of optimal frequency hopping sequence sets with low hit zone based on interleaving techniques. The presented low hit zone frequency hopping sequence sets are with new and flexible parameters and large family size which can meet the needs of the practical applications. Moreover, all the sequences in the proposed sets are cyclically inequivalent. Some low hit zone frequency hopping sequence sets constructed in literatures are included in our family. The proposed frequency hopping sequence sets with low hit zone are contributed for quasi-synchronous frequency hopping multiple access system to reduce or eliminate multiple-access interference.</p>

Set of Frequency-Hopping Sequence with Optimal Hamming Correlation

2014 ◽  
Vol 631-632 ◽  
pp. 834-838 ◽  
Author(s):  
Hong Wang ◽  
Ping Huang
Keyword(s):  
Spread Spectrum ◽  
Communication Systems ◽  
Cartesian Product ◽  
Frequency Hopping ◽  
Direct Sequence Spread Spectrum ◽  
Wireless Communication Systems ◽  
Frequency Hopping Sequence ◽  
Hamming Correlation ◽  
Optimal Average ◽  
Correlation Properties

In wireless communication systems, frequency hopping (FH) spread spectrum and direct sequence spread spectrum are two main spread coding technologies. In this paper,by the Cartesian product, we construct one class of one-coincidence frequency-hopping sequence set. It is shown that this set has optimal balance property, optimal average periodic Hamming correlation properties and optimal average periodic partial Hamming correlation properties according to the bounds.

Socioeconomic Factors in Adolescent Delinquency

1985 ◽  
Vol 28 (1) ◽  
pp. 21-29 ◽  
Author(s):  
N.D. Jejurikar ◽  
N.S. Shenvi
Keyword(s):  
Juvenile Delinquency ◽  
Socioeconomic Factors ◽  
Family Size ◽  
Nuclear Family ◽  
Large Family ◽  
Adolescent Delinquency ◽  
Sexual Offences ◽  
Large Family Size ◽  
Family Pattern ◽  
Delinquent Boys

[In Bombay, 371 delinquent boys and girls were interviewed in order to study the various socioeconomic factors. In the majority of the cases, an adverse home environ ment played a major role. 45% of the boys and 50% of the girls had incurred loss of one or both the parents. Factors like poverty, large family size, nuclear family pattern and illiteracy had a great bearing in causing aberrant behaviour in these children. Involvement in sexual offences in the form of elopement and/or rape were observed in girls. In boys, stealing was a major reason for being in the observation home. 70% of the delinquents did not belong to proper Bombay. With rapid urbanisation, the problem of juvenile delinquency is bound to increase manifold in the next few decades}.

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