Results 11 to 20 of about 64,360 (256)
Broadcast capability of direct sequence and hybrid spread spectrum [PDF]
IEEE Journal on Selected Areas in Communications, 1990 Two forms of spread-spectrum signaling, namely direct-sequence and hybrid (direct-sequence/frequency-hopped) are shown to provide high broadcast capability, especially when used in conjunction with forward-error-control coding schemes. The broadcast capability is defined as the maximum number of simultaneous distinct messages that can be transmitted to
Evaggelos Geraniotis, Behzad Ghaffari
openaire +1 more source
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
doaj +1 more source
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
doaj +1 more source
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
doaj +1 more source
Code Synchronization Algorithm Based on Segment Correlation in Spread Spectrum Communication
Algorithms, 2015 Spread Spectrum (SPSP) Communication is the theoretical basis of Direct Sequence Spread Spectrum (DSSS) transceiver technology. Spreading code, modulation, demodulation, carrier synchronization and code synchronization in SPSP communications are the core
Aohan Li +4 more
doaj +1 more source
IET Signal Processing, 2022 The Shannon‐Nyquist sampling theorem that is based on narrowband interference (NBI) detection and parameter estimation methods in direct sequence spread spectrum (DSSS) communication is limited by the high sampling rate.
Zengkai Shi +4 more
doaj +1 more source
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
doaj +1 more source
Tongxin xuebao, 2022 To solve the performance limitation of direct sequence spread spectrum system in complex multipath environment, an adaptive anti-jamming spread spectrum framework that organically combines single carrier frequency domain equalization (SCFDE) and direct ...
Fanglin GU +4 more
doaj +2 more sources
A Chaos-Based Secure Direct-Sequence/Spread-Spectrum Communication System
Abstract and Applied Analysis, 2013 This paper proposes a chaos-based secure direct-sequence/spread-spectrum (DS/SS) communication system which is based on a novel combination of the conventional DS/SS and chaos techniques.
Nguyen Xuan Quyen +2 more
doaj +1 more source
IEEE Access, 2020 Intra-body communication (IBC) uses the human body as the transmission medium for electrical signals, and it features the following advantages: low power consumption, strong anti-interference ability, high data security, and broad application scenarios ...
W. K. Chen +7 more
doaj +1 more source