Results 1 to 10 of about 2,817,014 (192)

FREQUENCY HOPPING SPREAD SPECTRUM RECEIVER DENGAN PSEUDO NOISE CODE [PDF]

open access: yesTechne, 2012
Dalam tulisan ini dirancang sebuah alat sistem telekomunikasi data digital dengan teknik Frequency Hopping Spread Spectrum dengan menggunakan Pseudo Noise Code.
Budihardja Murtianta
doaj   +4 more sources

Low-power adaptive pseudo noise code acquisition for spread-spectrum systems [PDF]

open access: yesIEEE Transactions on Wireless Communications, 2002
A novel pseudo noise code acquisition combined with the newly proposed adaptive sampling rate and threshold control (ASTC) algorithm is derived for low-power spread-spectrum systems with complementary metal-oxide-semiconductor implementations. Low-power performance can be achieved by reducing the sampling rate of the proposed system while maintaining ...
Mau-Lin Wu, Kuei-Ann Wen
exaly   +3 more sources

Soft smooth contrastive learning with hybrid memory for unsupervised visible-infrared person re-identification [PDF]

open access: yesScientific Reports
Unsupervised visible-infrared person re-identification (USL-VI-ReID) aims to match person images across visible and infrared modalities without any labeled data, which is severely hindered by the large cross-modality discrepancy and the absence of ground-
Cong Zhang   +5 more
doaj   +2 more sources

FREQUENCY HOPPING SPREAD SPECTRUM TRANSMITTER DENGAN PSEUDO NOISE CODE

open access: yesTechne, 2012
Dalam tulisan ini dirancang sebuah alat sistem telekomunikasi data digital dengan teknik Frequency Hopping Spread Spectrum dengan menggunakan Pseudo Noise Code.
Budihardja Murtianta
doaj   +1 more source

Small All-Range Lidar for Asteroid and Comet Core Missions

open access: yesSensors, 2021
We report the development of a new type of space lidar specifically designed for missions to small planetary bodies for both topographic mapping and support of sample collection or landing.
Xiaoli Sun   +12 more
doaj   +1 more source

Analysis of Precise Orbit Determination of BDS-3 MEO and IGSO Satellites Based on Several Dual-Frequency Measurement Combinations

open access: yesRemote Sensing, 2022
The Chinese BeiDou-3 navigation satellite system (BDS-3) is capable of transmitting both old B1I, B3I signals and new B1C, B2a, B2b signals. Current BDS-3 precise orbits are generally calculated using a B1I/B3I combination considering overlap with the ...
Bingfeng Tan, Qingsong Ai, Yunbin Yuan
doaj   +1 more source

Logistic Map-encrypted Chaotic Ranging Code as a Proposed Alternative to GNSS PRN Pseudorange Code [PDF]

open access: yesTransNav, 2019
Pseudo-Random Noise (PRN) Gold code was selected for utilisation as the Global Navigation Satellite System (GNSS) pseudo-range measurement code sequence.
Mia Filic, Franc Dimc
doaj   +1 more source

Research of Pseudo Random Noise Code and New Code Construction [PDF]

open access: yesAdvances in Intelligent Systems Research, 2013
The pseudo-random code is an important part of the satellite navigation and positioning signals, its performance directly affects the accuracy of positioning system. Especially, in navigation and communication integrated system, the system's anti-jamming, anti-multipath fading, anti-intercepted, anti-multiple access and synchronization are all closely ...
Junxia Cui, Ruizhu He
openaire   +1 more source

Unified Constellation Design Using Projection Over QAM: Concept and Examples

open access: yesIEEE Open Journal of the Communications Society, 2023
Beyond fifth generation (B5G) / sixth generation (6G) wireless systems require full utilization of all spectrums. However, hardware devices operating in the high-frequency bands bring a series of non-ideal behaviors, including nonlinear distortion caused
Xiaorui Yan   +6 more
doaj   +1 more source

Improving the Structure of a Signal Used for Real-Time Calibrating of the Receiving Channels of Digital Transceiver Modules in Digital Phased Antenna Arrays

open access: yesИзвестия высших учебных заведений России: Радиоэлектроника, 2021
Introduction. Modern digital phased array antenna (DPAA) systems incorporate a large number of identical transceiver modules (TMs). These modules require real-time calibration with a high level of accuracy.
Hung Tran Viet, Thien Hoang Minh
doaj   +1 more source

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