Synchronization and reliability of communication systems with frequency-hopping spread spectrum
Abstract
The paper considers the issue of increasing reliability and ensuring cyclic synchronization in communication systems with frequency-hopping spread spectrum (FHSS). Synchronization algorithms for systems with fast and slow frequency tuning are proposed, based on the analysis of information symbol coincidences and the introduction of synchronization symbols into the transmitted data stream. The developed structural diagrams describe the operation of frequency-hopping spread generators, computing devices, and matching filters. Analytical expressions are given for determining the cyclic synchronization time, estimating quantization noise, bit error probability, and signal-to-noise ratio. It is shown that the use of orthogonal packets provides the minimum probability of error compared to anti-phase signals. The results obtained make it possible to assess the influence of the parameters of frequency-hopping spread generators, frequency tuning speed, and interference level on synchronization accuracy. The advantage of the proposed approach is its versatility and the possibility of application to systems with different frequency tuning modes. The practical significance of the work lies in the possibility of using the results for designing reliable telecommunications systems and synchronization modules in software-defined radio systems
References
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