Results 151 to 160 of about 6,448 (211)

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

Compressed Receiver for Multipath DSSS Signals

IEEE Communications Letters, 2014
A compressed sensing (CS) assisted receiver for direct sequence spread spectrum (DSSS) signals transmitted over multipath frequency-selective channels is studied in this paper. We present a bit-error-rate analysis for the CS-domain maximum ratio combining receiver with perfect channel state information (CSI), and hence, the CS-induced signal-to-noise ...
Shuai Wang 0013, Jianping An, Yanyang Ren, Tiexing Wang, Xiangyuan Bu   +4 more
openaire   +1 more source

PAPR-based DSSS signal detection

2017 International Conference on Information and Communication Technology Convergence (ICTC), 2017
A new detection algorithm for direct sequence spread spectrum (DSSS) signals using peak-to-average power ratio (PAPR) is proposed. The received signals are divided into several blocks. Then we calculate peak-to-average power ratio of each block and we use the average of peak-to-average power ratios as test statistics.
Heetae Jin, Suk Chan Kim
openaire   +1 more source

Performance Analysis for DSSS With Short Period Sequences Encountering Broadband Interference

IEEE Transactions on Vehicular Technology
Understanding fundamental limits of the anti-interference performance of direct sequence spread spectrum (DSSS) systems is essential for efficient anti-interference implementation.
Qiaran Lu, Fangmin He, Ze Wang, Yufeng Ma, Zhong Yang, Yaxing Li, Hao Wu, Wei Li   +7 more
semanticscholar   +1 more source

Intelligent Multicriteria DSSs

2000
The discussion of the basic MCDA concepts and approaches in chapter 2 demonstrated that the decision maker and his/her preferences constitute the focal point of interest within the MCDA methodological framework. This special characteristic of MCDA is in accordance with the decision making process in complex and ill-structured problem domains.
Constantin Zopounidis, Michael Doumpos
openaire   +1 more source

Fractal Dimension of DSSS Frame Preamble: Radiometric Feature for Wireless Device Identification

IEEE Transactions on Mobile Computing
This paper demonstrates that the fractal dimension of frame preamble serves as a new radiometric feature that can be used together with other known radiometric features to enhance the identification accuracy in wireless device identification.
Xufei Li, Yin Chen, Jinxiao Zhu, Shuiguang Zeng, Yulong Shen, Xiaohong Jiang, Daqing Zhang   +6 more
semanticscholar   +1 more source

A Fast Time-Recursive Correlator for DSSS Communications

IEEE Signal Processing Letters, 2008
Direct sequence spread spectrum (DSSS) correlators synchronize received signals with locally generated replicas. They can be implemented either in time or frequency domains. Time-domain correlators are more flexible in multimode operations, and they are typically preferred in hardware-based implementations.
David Akopian, Sos S. Agaian
openaire   +1 more source

FPGA Implementation of Correlator for Direct Sequence Spread Spectrum (DSSS) Systems

2024 International Conference on Integrated Circuits and Communication Systems (ICICACS)
Spread Spectrum (SS) technology utilizes pseudo-noise codes to spread signal energy over a wider bandwidth, independent of message signal bandwidth. Direct Sequence Spread Spectrum (DSSS) employs pseudo-noise sequences synchronized at the receiver to ...
B. Satyanarayana, N. S. Teja, M. Pavan, Koduru Smrini, G. P. Kumar, Prudhvi Raj Budumuru   +5 more
semanticscholar   +1 more source

GQDs/Sb2S3/TiO2 as a co-sensitized in DSSs: Improve the power conversion efficiency of DSSs through increasing light harvesting by using as-synthesized nanocomposite and mirror

, 2020
In present work, GQDs/Sb2S3/TiO2 composite was prepared by sonochemistry method with ultrasonic probe with 60 W/cm2 intensity and 18 kHz frequency. Based on this composite, two different cells in the configuration of FTO/TiO2/GQDs/Sb2S3/TiO2/N719/Pt and ...
Hakimeh Teymourinia, Mohammad Hossein Darvishnejad, Omid Amiri, M. Salavati‐Niasari, A. Reisi-Vanani, E. Ghanbari, H. Moayedi   +6 more
semanticscholar   +1 more source

Fuzzy Logic Control for Doppler Search in DSSS Systems

IEEE transactions on fuzzy systems, 2020
The study on the Doppler frequency search strategy in direct sequence spread spectrum (DSSS) systems has been addressed in this article. To reduce the estimation error and alleviate the possible false detection, a novel Doppler search algorithm that ...
Xuesen Shi, Yuyao Shen, Yongqing Wang
semanticscholar   +1 more source