Results 21 to 30 of about 72,060 (294)
Frequency Sweep Keying CDMA for Reducing Ultrasonic Crosstalk
Sensors, 2022 Various sensors are embedded in automobiles to implement intelligent safety technologies such as autonomous driving and front–rear collision avoidance technology.
Ga-Rin Park +2 more
doaj +1 more source
Drones, 2022 This paper proposes the use of quasi-stationary aircraft and reconfigurable intelligent surfaces (RIS) to improve the system performance in satellite–terrestrial laser communication downlink.
Yi Wang, Haibo Wang, XueWen Jiang
doaj +1 more source
, 2014 Using an auxiliary random variable technique, we prove that binary differential phase-shift keying and binary phase-shift keying have the same asymptotic bit-error rate performance in lognormal fading channels.
Alouini, Mohamed-Slim +2 more
core +1 more source
Experimental investigation of the performance of different modulation techniques under controlled FSO turbulence channel [PDF]
, 2011 This paper experimentally investigates and compares the performance of the free space optics system employing three different modulation schemes, on-off keying (OOK) with nonreturn- to-zero (NRZ) and return-to-zero (RZ) and the binary phase shift keying (
Adebanjo, Olusegun +5 more
core +1 more source
Novel Chaos Secure Communication System Based on Walsh Code
Journal of Electrical and Computer Engineering, 2015 A multiuser communication scheme which is a hybrid of Walsh code with DCSK and CDSK is proposed to improve low data transmission rate of Differential Chaos Shift Keying (DCSK), poor bit error ratio (BER) performance of Correlation Delay Shift Keying ...
Gang Zhang, Niting Cui, Tianqi Zhang
doaj +1 more source
DAC-Less amplifier-less generation and transmission of QAM signals using sub-volt silicon-organic hybrid modulators [PDF]
, 2015 We demonstrate generation and transmission of optical signals by directly interfacing highly efficient silicon-organic hybrid (SOH) modulators to binary output ports of a field-programmable gate array. Using an SOH Mach-Zehnder modulator (MZM) and an SOH
Bogaerts, Wim +10 more
core +3 more sources
Generalized PSK in Space Time Coding [PDF]
, 2004 A wireless communication system using multiple antennas promises reliable transmission under Rayleigh flat fading assumptions. Design criteria and practical schemes have been presented for both coherent and non-coherent communication channels.
Han, Guangyue
core +3 more sources
Fabriquer des hybrides jeu-travail : exploration des logiques de conception de dispositifs gamifiés
Sciences du JeuProducing gamified devices combines game elements or structure with a work goal. In order to examine the processes that mobilize and transform theoretical models and practical objectives into a game shape, five research that present design choices and ...
Emmanuelle Savignac
doaj +1 more source
Study and Performance of Digital Modulation Techniques
International Journal of Computing and Related Technologies, 2022 The Fastest growing world has required fastest communication. The advancement in the technology brings the revolution in the world by introducing 1G to 6G in wireless technology.
Asad Ali, Rabia Ansari
doaj
IEEE Access, 2017 In this paper, we introduce a novel OFDM-aided multifunctional multiple-input multiple-output scheme based on multi-set space-time shift keying (MS-STSK), where the information transmitted over each subcarrier is divided into two parts: STSK codeword and
Ibrahim A. Hemadeh +3 more
doaj +1 more source