Results 211 to 220 of about 7,567 (237)

Randomized Positioning DSSS with Message Shuffling for Anti-Jamming Wireless Communications

International Conference on Data Science in Cyberspace, 2019
Traditional anti-jamming approaches like Frequency Hopping Spread Spectrum (FHSS) and Direct Sequence Spread Spectrum (DSSS) require the sender and the receiver to share a secret key prior to their communication. If this key is compromised by the jammer,
Ahmad Alagil, Yao Liu
semanticscholar   +1 more source

A channelized DSSS ultra-wideband receiver

Proceedings RAWCON 2001. 2001 IEEE Radio and Wireless Conference (Cat.No.01EX514), 2002
Critical to the design of a digital ultra-wideband (UWB) receiver is the ability for the analog-to-digital converter (ADC) to efficiently sample and digitize the UWB signal of several gigahertz. Designing a single ADC to operate at such frequencies is impractical, and parallel ADC architectures with each ADC operating at a fraction of the effective ...
openaire   +1 more source

Development of multi-user TDMA-based DSSS system

2019 2nd International Conference on Communication, Computing and Digital systems (C-CODE), 2019
Direct sequence spread spectrum (DSSS) is a state-of-the-art technology evolved over the last 3–4 decades. The inherent features of DSSS such as anti-jamming, multiple access, low probability of intercept (LPI) and above all ease of deployment makes it ...
A. Sajid, A. Habib, Saqib Ali, Saqib Ejaz   +3 more
semanticscholar   +1 more source

Improved method of DSSS signal parameter estimation

2010 2nd International Conference on Industrial and Information Systems, 2010
In Gaussian white noise environment, the DSSS signal parameters estimation which based on spectral correlation can get better parameter estimation results, but in the colored noise environment, its performance declined. In this paper, we have discussed the estimated effectiveness of this method in colored noise environment and proposed an improved ...
null Yang Shuang, null Deng Li
openaire   +1 more source

Depression and Somatic Symptoms Scale (DSSS)

2011
The scale was developed as a simultaneous measure of depression and somatic symptoms – two issues that frequently co-occur [1]. Though many preexisting questionnaires for depression contain items relating to somatic complaints, the DSSS is specifically concerned with the relationship between the two.
Azmeh Shahid, Kate Wilkinson, Shai Marcu, Colin M. Shapiro   +3 more
openaire   +1 more source

Two-criterial DSSS synchronization method efficiency research

2010 East-West Design & Test Symposium (EWDTS), 2010
By the way of simulations using computer, the statistical characteristics of locking in synchronism time, has been determined for the synchronization system, concluding two twin subsystems of spread spectrum signals detection. The criterion of the meaning moment time detection from the domain of uncertainty is “m-multiple repentance iteratively” and “k
H.V. Kharchenko, I.O. Tkalich, Y.I. Vdovychenko   +2 more
openaire   +1 more source

Jamming Performance Analysis of Chirp Jammers on DSSS Signals

Signal Processing and Communications Applications Conference, 2019
Direct Sequence Spread Spectrum (DSSS) signals are commonly used for a variety of applications including radar, positioning and communications. Under certain circumstances, a jammer can used as a counter measure to DSSS systems.
C. Toker, C. Sunu, Sevket Gögüsdere
semanticscholar   +1 more source

A Robust Demodulator for OQPSK–DSSS System

Circuits, Systems, and Signal Processing, 2014
IEEE802.15.4 standard has quickly become a benchmark in the era of Internet of things. The mandatory mode of 2.4 GHz physical layer of IEEE802.15.4 standard employs offset quadrature phase shift keying (OQPSK) modulation with direct sequence spread spectrum (DSSS). The performance of conventional differential demodulator is not satisfactory.
Shengchen Dai, Hua Qian, Kai Kang, Weidong Xiang   +3 more
openaire   +1 more source

?????????????????????????? ???????????????????????????? ?????????????? ???????????????????????? ???????? DSSS ?? FHSS ?????????????? ???????????????????? ???????????? ?? ??????????????????

2016
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openaire   +1 more source

Decision Support Systems (DSSs)

2023
Dilip Kumar Chakrabarti, Prabhat Mittal
openaire   +1 more source