spread-spectrum carrier frequency
Performance Improvement of Wireless Communications Using Frequency Hopping Spread Spectrum
... hopping spread spectrum is a transmission technology used in wireless networks and a technique to generate spread spectrum by hopping the carrier fre- quency FHSS uses narrow band ...
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Spread Spectrum Sensing Techniques for Transformer Frequency Response Data
... narrow frequency band is required for a single carrier frequency whereas a much wider bandwidth is required for frequency hopping of signals while transmitting the ...
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Design and Simulation of Digital Carrier Tracking Technique for High Dynamic Spread Spectrum Receiver
... moment, they present cycle slips introducing a phase ambiguity. We will show how to use the same frequency information as that of an FLL to build a nonambiguous phase detector, the Unambiguous ...
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Enabling dynamic spectrum access using SS MC CDMA
... By combining frequency domain and time domain dispersal of modulated symbols, two main variants of multi-carrier spread spectrum systems, the MC-CDMA and MC direct sequence CDMA MC-DS-CD[r] ...
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Simulation and Validation of Spread Spectrum Technique in In- Orbit Testing of the Satellite Transponder
... clean carrier measurement signal is modulated with a PN sequence, its spectrum will no longer be a single peak but a spreaded sin(x)/x-like ...the carrier wave is spread over a lager ...
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Modeling Simulation and Performance Analysis of PAPR in FBMC 5G System
... FBMC modulation scheme is a wide range Multi-carrier scheme. Sub channel modulation Executed by IFFT - similar to OFDM systems then filter through each subchannel specifically designed Prototype filter. Offers a ...
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SECURED COMMUNICATION USING SPREAD SPECTRUM TECHNIQUES
... 3.2 FREQUENCY HOPPING SPREAD SPECTRUM: FH is the type of SS in which the carrier hops randomly form one frequency to ...M-ary frequency shift keying ...
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Comparative Analysis of Various Digital Modulation Techniques for FHSS WCDMA over AWGN and Fading Channels
... frequencies. Frequency hopping spread spectrum is a technique to switch from one frequency channel to the other by shifting the carrier. Different modulation techniques can be used with ...
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Design and Develop Wireless System Using Frequency Hopping Spread Spectrum
... a frequency hopper in two meters could be made that skipped over commonly used repeater frequency ...A frequency hopped system can use analog or digital carrier modulation and can be designed ...
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Channel Capacity Analysis of Spread Spectrum Watermarking in Radio Frequency Signals
... is spread spectrum watermarking, since the spread spectrum watermarking has been used in the ATSC Synchronization Standard for Distributed Transmission ...[12]. Spread spectrum ...
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Contemporary Spread Spectrum Techniques: A Comparative Study Ashish G. Nandre 1, Yogesh R. Risodkar2
... the carrier frequency is selected randomly from the predefined set for message ...to frequency hopper which chooses random frequency ...and frequency diversity over a large ...
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Effects of Carrier Frequency Offset, Timing Offset, and Channel Spread Factor on the Performance of Hexagonal Multicarrier Modulation Systems
... (carrier frequency offset, timing offset) on the amplitude and phase of the demodulated symbol by using a projection receiver in hexagonal multicarrier modulation ...channel spread factor on the ...
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Exploring the reconfigurability options of multi carrier CDMA in cognitive radio systems
... multi-carrier spread spectrum sys- tems are the MC-CDMA (frequency domain spreading) and MC direct sequence CDMA (MC-DS-CDMA) (time domain ...better frequency diversity and higher data ...
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Efficient Transmission of Information using Transmission Code along FHSS
... a spread-spectrum system uses a process other than the information signal to expand, or spread, the bandwidth of the ...for spectrum spreading are direct sequence and frequency ...The ...
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Interference Excision in Spread Spectrum Communications Using Adaptive Positive Time Frequency Analysis
... In spread spectrum (SS) communications, the message sig- nal is modulated and spread over a wider bandwidth with a pseudonoise (PN) code also known at the receiver, and trans- mitted over the ...
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Robust Block Selection for Watermarking Video Streams
... The proposed algorithm is designed for watermarking low resolution (CIF and QCIF) video streams. During the design of a video watermarking algorithm complexity has to be taken into count. A trade-off has to be made ...
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Packet-Hiding Mechanism for Selective Jamming Technique
... wireless transmissions under the external bug model. Potential disclosure of secrets due to hub compromise neutralizes the gains of Spread Spectrum. Broadcast communications are particularly open to attack ...
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During class please switch off your mobile, pager or other that may interrupt.
... Interleaving can be sped up by using different depths, i.e. by taking bigger chunks of the original RS words you will be able to construct your first bloc for transmission much quicker. This has the disadvantage that ...
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Welcome to the United States Patent and TradeMark Office
... the frequency modulator 13. The frequency modulator 13 modulates the frequency of oscillator 14 which has been adjusted for an output of 14,500 Hz as described ...idealized frequency response ...
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An Active PWM Technique For A Transformer less H-Bridge Cascaded STATCOM With Wye Configuration
... and [41], in which dc voltage balancing control and low-frequency modulation are achieved. Compared with the method in [40] and [41], a method changing the phase-shift angle for dc voltage balancing control is ...
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