scholarly journals Performance of delay and add direct sequence spread spectrum modulation scheme with fast frequency hopping in frequency selective Rayleigh channels

2011 ◽  
Author(s):  
Vincent Le Nir ◽  
Bart Scheers
Keyword(s):  
Spread Spectrum ◽  
Frequency Hopping ◽  
Direct Sequence Spread Spectrum ◽  
Modulation Scheme ◽  
Direct Sequence ◽  
Rayleigh Channels ◽  
Fast Frequency Hopping ◽  
Frequency Selective ◽  
Spread Spectrum Modulation

Analisis Karakterisasi Teknologi Direct Sequence Spread Spectrum Dan Frequency Hopping Spread Spectrum

2019 ◽  
Vol 2 (2) ◽  
pp. 129-138
Author(s):  
Fawzan Galib Abdul Karim Bawahab ◽  
Elvan Yuniarti ◽  
Edi Kurniawan
Keyword(s):  
Spread Spectrum ◽  
Communication Systems ◽  
Multiple Access ◽  
Frequency Hopping ◽  
Direct Sequence Spread Spectrum ◽  
Direct Sequence ◽  
Frequency Hopping Spread Spectrum ◽  
Two Systems ◽  
The Difference

Abstrak. Pada penelitian ini, telah dilakukan analisa karakterisasi pada teknologi Direct Sequence Spread Spectrum dan Frequency Hopping Spread Spectrum, sebagai salah satu teknik multiple-access pada sistem komunikasi. Karakterisasi dilakukan untuk mencari bagaimana cara meningkatkan keoptimalan kedua sistem tersebut, dalam mengatasi masalah interferensi dengan sistem dan channel yang sama. Dan juga untuk menentukan veriabel apa yang mempengaruhi keoptimalan kedua sistem tersebut. Karakterisasi dilakukan dengan menentukan variabel-variabel yang mempengaruhi keoptimalan keduanya. Hasil dari karakterisasi, diketahui variabel-variabel yang mempengaruhi kemampuan sistem DSSS yaitu nilai frekuensi spreading (). Sedangkan untuk sistem FHSS yaitu nilai frekuensi spreading ( dan ) dan selisih antara frekuensi hopping data dengan frekuensi hopping interferensi . Kata Kunci: BER, DSSS, FHSS, Interference, Spread spectrum. Abstract. In this study, characterization of Direct Sequence Spread Spectrum and Frequency Hopping Spread Spectrum technologies have been done, as one of the multiple-access techniques in communication systems. Characterization is done to find out how to improve the ability of the two systems, in solving interference problems with the same system and channel. And also to determine what veriabel affects the ability of the two systems. Characterization is done by determining the variables that affect the ability of both. The results of the characterization, known variables that affect the ability of the DSSS system are the spreading frequency value (). As for the FHSS system, the spreading frequency value ( and ) and the difference between frequency hopping data with frequency hopping interference .

A Novel Anti-Jamming Driven Sparse Analysis-Based Spread Spectrum Communication Methodology

2018 ◽  
Vol 33 (01) ◽  
pp. 1958001 ◽  
Author(s):  
Wenzhun Huang ◽  
Zhe Liu ◽  
Lintao Lv ◽  
Liping Wang ◽  
Shanwen Zhang
Keyword(s):  
Spread Spectrum ◽  
Direct Sequence Spread Spectrum ◽  
Research Topic ◽  
Spread Spectrum Communication ◽  
Experimental Result ◽  
Direct Sequence ◽  
Analysis Framework ◽  
Communication Analysis ◽  
Spread Spectrum Modulation ◽  
Sparse Presentation

With the rapid and bursting development of communication engineering and some related techniques, spread spectrum communication and sparse analysis have been a hot research topic in the research community. A novel anti-jamming driven sparse analysis-based spread spectrum communication methodology is proposed in this paper, which mainly increases the spread spectrum modulation and the spread spectrum demodulation in the receiving end. The process of spread spectrum communication according to the working methods of different methodologies including direct-sequence spread spectrum. In this paper, the sparse presentation, dictionary learning, anti-jamming analysis and the basic communication theories are integrated altogether to enhance the traditional spread spectrum communication analysis framework. The experimental result proves the robustness of the proposed method.

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