Code-Time Diversity for Direct Sequence Spread Spectrum Systems [PDF]
The Scientific World Journal, 2014 Time diversity is achieved in direct sequence spread spectrum by receiving different faded delayed copies of the transmitted symbols from different uncorrelated channel paths when the transmission signal bandwidth is greater than the coherence bandwidth ...
A. Y. Hassan
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Blind Estimation of Spreading Sequence and Data Bits in Direct-Sequence Spread Spectrum Communication Systems [PDF]
IEEE Access, 2020 At the transmitter of a Direct Sequence Spread Spectrum (DSSS) communication system, data bits are spread using a spreading sequence. To demodulate the transmitted data bits, the received signal should be de-spread using the same spreading sequence ...
Hoesang Choi, Hichan Moon
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On the Estimation of Synchronous Scramblers in Direct Sequence Spread Spectrum Systems
IEEE Access, 2020 In a non-cooperative context, the receiver has no information about communication parameters; therefore, it must perform communication forensics, which is the process of identifying what information it can from the collected data.
Dongyeong Kim +2 more
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Blind Demodulation of Chaotic Direct Sequence Spread Spectrum Signals Based on Particle Filters
Entropy, 2013 Applying the particle filter (PF) technique, this paper proposes a PF-based algorithm to blindly demodulate the chaotic direct sequence spread spectrum (CDS-SS) signals under the colored or non-Gaussian noises condition.
Yimeng Zhang +5 more
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Novel direct sequence spread spectrum communication method
Tongxin xuebao, 2023 In response to the problem of limited performance and low spectral efficiency in complex multipath environments of traditional direct sequence spread spectrum communication, a cyclic prefix (CP) block transmission structure spread spectrum system with a ...
Fanglin GU +5 more
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Blind Estimation of Direct Sequence Spread Spectrum Signal Based on MCMC-UKF [PDF]
Jisuanji gongcheng, 2019 Aiming at the problem of spreading code and information sequence blind estimation for long code Direct Sequence Spread Spectrum(DSSS) signal,this paper proposes a joint estimation algorithm based on overlapping segment Markov Chain Monte Carlo-Unscented ...
MA Chao, ZHANG Limin
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On Effectiveness of Hopping-Based Spread Spectrum Techniques for Network Forensic Traceback [PDF]
International Journal of Networked and Distributed Computing (IJNDC), 2013 Network-based crime has been increasing in both extent and severity and network-based forensics encapsulates an essential part of legal surveillance. A key network forensics tool is traceback that can be used to identify true sources of suspects.
Wei Yu +6 more
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Improving Signal Security of Secondary Surveillance RADAR by Using Direct Sequence Spread Spectrum Technology [PDF]
علوم و فنون نظامی, 2020 Secondary radars are important equipment in the aviation industry. The basis of this system is the use of the L-band Q&A system for aircraft identification.
Jafar Khalilpur, Mohammad Farahmand rad
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Analysis and comparison of code index modulation and multi-ary spread spectrum
Dianzi Jishu Yingyong, 2018 In the current anti-jamming communication, the spread spectrum communication has been studied deeply with the advantages of strong anti-jamming ability and good security performance.
Feng Sheng +4 more
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Sensors, 2014 Indoor localization of persons and objects poses a great engineering challenge. Previously developed localization systems demonstrate the use of wideband techniques in ultrasound ranging systems.
Laurent Segers +3 more
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