in-band frequency hopping
Performance Improvement of Wireless Communications Using Frequency Hopping Spread Spectrum
... Frequency 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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Research on Anti Jamming Performance of GMSK in Shortwave Frequency Hopping
... Radio frequency-hopping technology has been widely used in military communications and has greatly improved anti-interception and anti-interference capabilities of military equipmen [1] ...and band ...
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Low Complexity Erasure Insertion in Frequency Hopping Spread Spectrum Communications Subjected to Fading and Partial Band Interference
... Slow Frequency-Hopping Spread-Spectrum (SFH/SS) wireless sys- tems Forward Error-Correction (FEC) codes, such as for example Reed-Solomon (RS) codes are often used, in order to mitigate the performance ...
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Frequency Hopping Spread Spectrum Security Improvement with Encrypted Spreading Codes in a Partial Band Noise Jamming Environment
... Frequency Hopping Spread Spectrum (FHSS) system is often deployed to protect wireless communication from jam- ming or to preclude undesired reception of the ...hidden frequency hopping is ...
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Simulation of Analog Phase-locked Loop for Frequency Hopping Application
... The frequency hopping spread spectrum (FHSS) technique has become a subject of interest, as it has been applied in many ...carrier frequency rapidly and a PLL based system is required to generate the ...
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Performance Analysis of Reliable Adaptive Transmission for Mobile Radio Slow Frequency Hopping Channels Aided by Long Range Prediction
... narrow band users, current and emerging communication services that employ spread spectrum techniques are operating as overlay systems in the multi-user ...narrow band interference [69], the performance ...
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Jamming Mitigation by Randomized Bandwidth Hopping
... the frequency band occupation of the signal in order to achieve a desirable jamming ...bandwidth hopping as a technique to increase the jam- ming resistence of spread spectrum communications without ...
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Multistage Frequency Hopping Assisted Ultra Wideband Multiple Access Communications
... FH band are activated with the same probability; and d) it is also desirable for the transmitter to hop to a frequency far from the previous one, ...
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Secure Collision-Free Frequency Hopping for OFDMA-Based Wireless Networks
... on frequency acquisition. In existing FH systems, exact frequency synchronization has to be kept between the transmitter and the ...fast hopping system ...the hopping rate and the number of ...
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Realization of Simplified Diversity Combining Algorithms for Fast Frequency Hopping System
... fast frequency hopping system, the diversity combining technique of the receiver can effectively restrain the partial band interference, and it is the key to improve the anti-jamming ...
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Density Fluctuation Measurements Using a Frequency Hopping Reflectometer in JT-60U
... X- band mixer, a 32 MHz bandpass filter, and a video detec- ...after frequency hopping owing to unlocking of PLL stabi- ...after hopping (700 µ s at the maxi- mum), the two oscillators can be ...
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Study of LDPC Coded SFH System with Partial Band Interference
... Frequency hopping (FH) transmissions, whose carrier frequency hops under control of a pseudorandom pattern, is an attractive access method in wireless communication, due to its special ability to ...
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Contemporary Spread Spectrum Techniques: A Comparative Study Ashish G. Nandre 1, Yogesh R. Risodkar2
... narrow band information signal over wideband of ...entire frequency band; the receiver can correlate the received signal with replicate of the random sequence to retrieve the original information ...
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Unimodular sequence design under frequency hopping communication compatibility requirements
... Many pieces of work have been devoted to design radar sequences which are capable of spectrum compatibility. For instance, the sequence designing technique proposed by Gerlach [10] can generate sequences with some ...
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Network Sorting Algorithm for Multi frequency Hopping Signals with Adaptive SNR
... of frequency hopping source signals reaches 5, the sorting performance is greatly reduced regardless of the SNR; The sorting performance of the proposed algorithm is almost the same when N = 3, 4, 5, the ...
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DEVELOPMENT OF A DIGITALLY TUNED QUADRATURE OSCILLATOR
... 153 | P a g e transconductance amplifier (OTA) provided the facility of electronic tuning but suffered from linearity problems. A new technique of designing sinusoidal oscillators based on the digitally tuned current ...
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Synthesis and ac conductivity studies of polyaniline- Co3O4 composites prepared by ex situ polymerization technique
... formation of bond between the two constituent materials helps the PANI chains to grow at larger lengths. At higher frequencies the charge carriers get sufficient energy to hop between the desired sites. The influence of ...
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Running, hopping and trotting: tuning step frequency to the resonant frequency of the bouncing system favors larger animals
... all hopping runs and trotting dogs, but was not satisfied in one trotting run of the monkey, one run of the rhea and three runs of the turkeys (see n in Table ...
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An Improved CRLH Wide-Band Filter Using CSRRs with High Stop Band Rejection
... stop band and increase rejection ...stop band is ...desired band (due to the equivalent single negative permittivity), without deteriorating signal transmission in other ...stop band and ...
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Thermal Characteristics of Brillouin Microsphere Lasers
... certain frequency )n the past decades the SBS has attracted intensive interests for its unique features such as low threshold and narrow linewidth and been widely developed and investigated in fiber based system ...
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