Results 261 to 270 of about 6,742,680 (324)

Iterative double-differential direct-sequence spread spectrum reception in underwater acoustic channel with time-varying Doppler shifts.

Journal of the Acoustical Society of America, 2023
Conventional double differential phase-shift keying modulation amplifies the phase noise and performs poorly under the time-varying direct-sequence spread-spectrum (DSSS) communication system.
Dajun Sun, Jie Wu, Xiao-Ping Hong, Changxin Liu, Hongyu Cui, Boyu Si   +5 more
semanticscholar   +1 more source

Spread spectrum communications: myths and realities

IEEE Communications Magazine, 1979
Spread spectrum communication techniques date back to the early fifties. Since the earliest applications, system improvements have been more evolutionary than revolutionary. Like most improvements in electronic systems, these are due primarily to the availability of ever higher speed integrated circuit components, which translate in this case ...
openaire   +3 more sources

Spread-Spectrum Communication

2023
Abstract One of the first applications of the wartime and postwar informational studies of noise was the spread-spectrum technology that scrambled transmitted signals in a communication system for encryptive or antijamming purposes. These scrambled signals effectively “rode on” a noisy carrier.
openaire   +1 more source

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

International journal of pattern recognition and artificial intelligence, 2018
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.
Wenzhun Huang, Zhe Liu, Lintao Lv, Li-Ping Wang, Shanwen Zhang   +4 more
semanticscholar   +1 more source

The spread spectrum GFDM schemes for integrated satellite-terrestrial communication system

China Communications, 2019
Recently, integrated Satellite-Terrestrial (S-T) communication system, especially the integration of satellite communication with 5G/6G, is regarded as a research hotpot.
Yang Yang, Lidong Zhu, Xing Mao, Qi Tan, Zongmiao He   +4 more
semanticscholar   +1 more source

Direct Spread Spectrum Modulation and Dispersion Compensation for Guided Wave-based Communication Systems

IUS, 2019
Guided wave-based monitoring systems which involve multiple transmitting piezo-transducers permanently in-stalled on structures, often rely on time or frequency-division multiplexing schemes. Alternatively, strategies employing code-division are becoming
F. Zonzini, Luca De Marchi, N. Testoni, A. Marzani   +3 more
semanticscholar   +1 more source

A spread spectrum communications channel sounder

IEEE Transactions on Communications, 1997
The design of a microwave channel probing analyzer is presented and discussed. Special attention is paid to the characteristics of the transmission path to be measured; the choice of spread spectrum probing signal; the signal processing methods used; modulation, demodulation, and synchronization at the transmitter and receiver sites; the path model to ...
John Austin, Walter P. A. Ditmar, Wai Keung Lam, Enric Vilar, Kin Wa Wan   +4 more
openaire   +3 more sources

Combination Sequences for Spread Spectrum Communications

IEEE Transactions on Communications, 1977
Certain communication systems which employ spread spectrum techniques as a means of supporting multiple users need very long codes to guard against the threat of intentional jamming, but cannot tolerate the lengthy acquisition time which long codes usually require.
Laurence B. Milstein, Ronald R. Ragonetti   +1 more
openaire   +2 more sources

Spreading codes for wireless spread spectrum communications

Proceedings of ICC/SUPERCOMM '96 - International Conference on Communications, 2002
Spread spectrum techniques are often utilized when designing wireless communication systems. The success of a spread spectrum system depends greatly upon the spreading codes employed by the transmitters. In this paper, a novel approach to the generation of spreading codes is examined.
K. Hetling, G. Saulnier, P. Das
openaire   +1 more source

Direct Sequence Spread Spectrum Underwater Acoustic Communication Based on Differential Correlation Detector

International Conference on Signal Processing, Communications and Computing, 2018
Taking advantage of the spread processing gain, direct-sequence spread-spectrum (DSSS) underwater acoustic (UWA) communication system can be carried out at low signal levels, which is the preferred method for high quality UWA communication and remote UWA
Pengyu Du, Xiao-Hui Zhu, Yinghao Li
semanticscholar   +1 more source