Wireless field trial results of a high hopping rate FHSS-FSK testbed

Čabrić, Danijela; Eltawil, Ahmed M.; Zou, Hanli; Mohan, Sajith; Daneshrad, Babak

doi:10.1109/jsac.2005.845437

Cited by 10 publications

(4 citation statements)

References 14 publications

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“…Synchronization header and sub-synchronization headers structure are shown respectively in Fig.4 and Pn [2] Pn [3] Pn [4] Pn [5] sub-synchronization header For the receiver, we use the same hopping pattern as originating. The duration time of each frequency hopping point is ( + 1) h .…”

Section: Bpfmentioning

confidence: 99%

“…Obviously, FFH is more robustness in the presence of frequency-selective fading effect and narrow-band interferences than the traditional SFH systems. But high-speed frequency hopping rate brings about a series of problems [4] [5], of which the synchronization acquisition is the most challenging issue. The fundamental problem in this area is to effectively acquire coarse time alignment between the received signal tone and the receiver's local dispreading tone with 1/2 code-hop interval.…”

Section: Introductionmentioning

confidence: 99%

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A new acquisition method in FFH system

Wang

Mei

et al. 2014

9th International Conference on Communications and Networking in China

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Modern Fast Frequency Hopping (FFH) systems generally use the sliding correlation scheme and the matched filter scheme which both have the best anti-jamming performance. However, the sliding correlation scheme converges too slowly and the matched filter scheme occupies too much hardware resource. An improved acquisition method was developed. Compared with the former two methods, the new method which has the same synchronization probability and false alarm probability, decreases the mean acquisition time and reduces the hardware complexity. Simulations show that, the improved scheme which keeps the best anti-jamming performance, has a simpler structure than the classical sliding correlation acquisition. Meanwhile, the acquisition speed of the new method is almost as fast as the classical matched filter acquisition.

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Section: Bpfmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A new acquisition method in FFH system

Wang

Mei

et al. 2014

9th International Conference on Communications and Networking in China

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“…Frequency detection module. The Frequency detection module is one important part of DFH system [7] , the main function is by using Fourier transform principle to detect the current frequency value of DFH signal.…”

Section: The Design Of Shortwave Dfh Receivermentioning

confidence: 99%

The Design and Implementation of Shortwave DFH Communication Receiver Based on FPGA

Zhou

Zhao

Feng³

2012

AMM

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Shortwave DFH system is a new type of communication system, and it is widely used in various fields because of its good anti-interference and anti-fading ability performance in anti-interference and anti-fading. A shortwave DFH communication receiver is designed based on Virtex4-sx35 series FPGA development board using Verilog HDL and VHDL language, and the function of this receiver is implemented and simulated. The result of simulating shows that the designed shortwave DFH receiver is effectively.

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“…Currently, the main technologies to improve data link anti-jamming capability are the follows: improving code rate of the DSSS signal, increasing code length, optimizing the properties of spreading code [1][2][3], accelerating hopping signal, increasing hopping points, optimizing hopping pattern [4][5][6], adaptive interference cancellation technique [7], hybrid spread spectrum [8][9][10], and so on. These techniques are based on the traditional spread spectrum technology to improve anti-jamming capability of the system, but they still cannot meet the higher requirements of certain anti-jamming system.…”

Section: Introductionmentioning

confidence: 99%

Multi-sub-channels Spread Spectrum Anti-interference System and its Performance

Huang¹,

Zhang²

2014

Proceedings of the International Conference on Logistics, Engineering, Management and Computer Science

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Abstract-Based on direct sequence spread spectrum, M-ary spread spectrum, multicarrier code division multiple access (CDMA), orthogonal frequency division multiplexing (OFDM) technology, etc., a new wireless communication anti-interference system, i.e. multi-sub-channels spread spectrum (MSCSS) system, has been proposed here. Transmitting end of the system processes spread spectrum twice using channel pseudo-random code and sub-channel pseudo-random code. Each bit of digital baseband signal was transmitted, through time-division manner, with 16 spread spectrum sub-channel signals. Pseudorandom codes of each spreading sub-channel are orthogonal to each other, so is the center frequency. Meanwhile, receiving end processes every bit of information in manner of parallel accumulation and adaptive threshold decision, to achieve receiving and processing of relevant multi-sub-channel spread spectrum signals, thereby improving noise immunity of communication system. Theoretical analysis and simulation results show that anti-interference capacity of the system is superior to traditional hybrid spread spectrum communication system. In detail, at the same information rate and the same bandwidth, its interference tolerance is higher than that of the hybrid DS/FH spread spectrum system by 5 dB.

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Wireless field trial results of a high hopping rate FHSS-FSK testbed

Cited by 10 publications

References 14 publications

A new acquisition method in FFH system

A new acquisition method in FFH system

The Design and Implementation of Shortwave DFH Communication Receiver Based on FPGA

Multi-sub-channels Spread Spectrum Anti-interference System and its Performance

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