نتایج جستجو برای: signal modulation

تعداد نتایج: 549152  

Journal: :International Journal of Engineering Research and Technology 2020

Journal: :Mathematical Problems in Engineering 2015

2011
Matthew J. Price

One component of wireless communications of increasing necessity in both civilian and military applications is the process of automatic modulation classification. Modulation of a detected signal of unknown origin requiring interpretation must first be determined before the signal can be demodulated. This thesis presents a novel architecture for a modulation classifier that determines the most l...

2014
Tripty Singh

In recent years CDMA becomes most widely used spread spectrum technique in wireless communication system because MC-CDMA allows multiple users to share the same frequency spectrum simultaneously. In this paper, generating an input signal and modulating it using MCCDMA.After the modulation of signals, different noises are added to the modulated signal. And checking the received signal, BER, SNR,...

Journal: :international journal of communications and information technology 0
a. r. sharifi pur shirazi islamic azad university - dariun branch m. kazemian islamic azad university - kerman branch m. jabbari islamic azad university - marvdasht branch

in this paper first we try to analysis the behavior ofthe soas in the optical networks and then have proposed anumerical simple model to simulate the behavior of thesemiconductor optical amplifiers. after that by employing thismodel as inline amplifier for a dwdm optical system, we havesimulated the transmission of 10 channels with bit rate 10 gb/sup to distance 3970 km with rz-dpsk modulation ...

Journal: :journal of electrical and computer engineering innovations 2015
arash bahrami wai pang ng zabih ghassemlooy thavamaran kanesan

in this paper, we propose an optical millimetre wave radio-over-fibre (mm-wave rof) system that uses a dual drive mach zehnder modulator (dd-mzm), which is biased at the maximum transmission biasing point, to generate an optical double sideband-suppressed carrier. the input to the dd-mzm are binary phase shift keying (bpsk), quadrature phase shift keying (qpsk), 8-phase shift keying (8-psk) and...

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