Frequency-Hopping (FH)
Multistage Frequency Hopping Assisted Ultra Wideband Multiple Access Communications
... stage Frequency-Hopping (FH) invoked in the context of non- coherent M -ary Frequency Shift Keying ...Ultra-WideBand Frequency-Hopping Multiple Access and use the abbreviation of ...
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Secure Collision-Free Frequency Hopping for OFDMA-Based Wireless Networks
... collision-free frequency hopping (CFFH) system based on the OFDMA framework and an innovative secure subcarrier assignment ...each hopping period, and different users always transmit on nonoverlapping ...
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Network Sorting Algorithm for Multi frequency Hopping Signals with Adaptive SNR
... Based on the above issues, this paper put forward a SNR-adaptive sorting algorithm using the time-frequency (TF) sparsity of FH signal. Firstly, the hybrid frequency hopping signal is ...
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High Power VHF Frequency-Hopping Filters with High Suppression of Second Harmonic
... power frequency-hopping (FH) filter are proposed in this ...center frequency, especially the suppression of second harmonic with two ...
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The Performance of Fast Frequency Hopping System in Additive White Gaussian Noise (AWGN)
... faster frequency hopping rates to scrutinize the performance of channel in the presence of AWGN has been ...fast frequency hopping style in the occurrence of AWGN using two linear combination ...
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Unimodular sequence design under frequency hopping communication compatibility requirements
... Frequency hopping (FH) communication, as one kind of wireless communication modes, plays an important role in the field of military communications for its promi- nent anti-jamming ...the FH ...
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Robust Blind Frequency and Transition Time Estimation for Frequency Hopping Systems
... Frequency hopping spread spectrum (FHSS) techniques are widely used in military communications for combating narrowband interference and for security ...estimating frequency and timing ...multiple ...
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Joint interference estimation and cancellation for coherent frequency hopping multiple access systems
... for FH/MFSK in [7] and [8], ...slow frequency hopping (SFH) systems in [9, 10] and ...slow frequency hopping/phase-shift keying (SFH/PSK) coher- ent synchronous frequency ...
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Research on Anti Jamming Performance of GMSK in Shortwave Frequency Hopping
... As can be seen from Figure 3, as the SIR ratio increases, the SFH/GMSK bit error rate will decrease. The larger the γ value, the greater the bandwidth occupied by the interference band, the stronger the interference ...
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Realization of Simplified Diversity Combining Algorithms for Fast Frequency Hopping System
... fast frequency hopping system, in order to achieve diversity, a symbol is required to repeat the transmission L times, reducing the probability of partial band ...detection frequency diversity, a ...
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ANTI-JAMMING BROADCAST COMMUNICATION USING UNCOORDINATED FREQUENCY HOPPING
... Frequency hopping has been traditionally employed in order to overcome the presence of a ...jammer. Frequency hopping can be either reactive or ...their frequency of operation; these ...
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Density Fluctuation Measurements Using a Frequency Hopping Reflectometer in JT-60U
... after frequency hopping owing to unlocking of PLL stabi- ...after hopping (700 µ s at the maxi- mum), the two oscillators can be ...each frequency step is typically held constant for 20 ms, ...
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Dual-Function MIMO Radar-Communications Employing Frequency-Hopping Chirp Waveforms
... interferences. Frequency-hopping chirp waveform proposed in this paper possesses the above properties, and in addition, it is simple to generate and immune to ...proposed frequency-hopping ...
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Low-Complexity Design of Frequency-Hopping Codes for MIMO Radar for Arbitrary Doppler
... In Section 2, we present our model for MIMO radar and frequency-hopping waveforms. In Section 3, we reformulate Chen and Vaidyanathan’s MIMO ambiguity function such that it is applicable to any general ...
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Diversity Combining for Fast Frequency Hopping Multiple Access Systems Subjected to Nakagami m Fading
... Abstract- The achievable performance of various diversity combining schemes used in fast frequency hopping FFH aided M-ary frequency shift keying MFSK systems operating in a multiple acc[r] ...
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Rectangular Ring Frequency Reconfigurable Micro Strip Antenna RRFRMSA for Frequency Hopping Wireless Networks and SDR
... The frequency diversity antennas are gaining attention to minimize the adverse effects caused by multipath signal propagation, increase the channel capacity by frequency reuse, minimize the disturbance of ...
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Simulation of Analog Phase-locked Loop for Frequency Hopping Application
... during frequency hopping. The simulation is performed to generate hopping carrier frequencies at ...carrier frequency. The simulation for frequency error behavior during ...
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Performance Improvement of Wireless Communications Using Frequency Hopping Spread Spectrum
... to frequency do- main and vice ...the frequency and simulate them in MATLAB and as result the simulated spectrums are an- ...next frequency hopping sequence chan- nel is ...
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Column generation for frequency assignment in slow frequency hopping networks
... slow frequency hopping (SFH) is going beyond this one-to-one mapping and assigns multiple frequen- cies to each ...one frequency, but changes its trans- mitting frequency within a specific ...
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Blind Soft Detection Assisted Frequency Hopping Multicarrier DS CDMA Systems
... 3, for the SFH/MC DS-CDMA system using a constant-weight code CQ; 2v; U in order to activate the subcarriers and using a receiver without the explicit knowledge of the FH pattern - exce[r] ...
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