منابع مشابه
Survey on Qpsk Modulator
The modulators are the essential demand of communication systems they are designed to scale back the channel distortion & to use in RF communication therefore several sort of carrier modulation techniques has been already projected consistent with channel properties and rate of the system. Modulation is that the method of causation knowledge signal over carrier signal to attenuate the noise or ...
متن کاملA Direct Injection-Locked QPSK Modulator Based on Ring VCO
QPSK or Quadrature Phase-Shift Keying is a higher order modulation scheme used in digital modulation. A direct injection locked QPSK modulator uses VCO for minimize the area of the conventional modulator. In this project injection locking scheme is used since injection locking has an advantage inphase-noise reduction ofoscillators withavery simplecircuittopology. By using proposed simple modula...
متن کاملQPSK Modulator on FPGA using 64 Values ROM
In many applications such as TDMA cellular telephone, OFDM, Bluetooth, Satellite communication etc. QPSK digital modulation technique is used due to its higher bandwidth efficiency, higher noise immunity and simpler circuit. Simpler circuit is having lower cost, smaller size and lower power dissipation. In this paper a new circuit for QPSK modulator is designed which improves the area of the ci...
متن کاملDesign of BPSK/QPSK Modulator using Verilog HDL and Matlab
Quadrature Phase Shift Keying (QPSK) is a modulation scheme commonly used in wireless communication system and it’s because of its ability to transmit twice the data rate for a given bandwidth. In most cases, the QPSK modulator consumes less power and bandwidth in a modern devices but for a system like satellite and mobile devices where their operations are power limited, this is a problem that...
متن کاملA High Bit Rate Miniaturized QPSK Modulator for Satellite Data Transmission
Introduction Space communication systems are designed based on the prime requirements of size, weight, on-board power requirements and reliability. Various factors limit the transmission of data from satellites and the design of the system becomes more complex with an increase in data rates. Indian Remote Sensing (IRS) satellites provide data in a variety of spatial, spectral and temporal resol...
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ژورنال
عنوان ژورنال: Active and Passive Electronic Components
سال: 2002
ISSN: 0882-7516,1563-5031
DOI: 10.1080/08827510211280