Abstract
Frequency hopping spread spectrum with noncoherent M-ary frequency shift keying system is considered. In this study Reed Solomon codes RS (255, 223) are employed in a standard error correction role to provide some Anti-Jamming (AJ) capability with 8-bit symbols. Noise has been added to RS encoded data, which is demodulated at RS decoder perfectly. Matlab simulations have been implemented for numerical results. Graphical results have been plotted between the probability of an erasure versus ρ using RS (255, 223) code for 1 and 2 kHz frequencies. The simulation results have proved that system having RS (255, 223) code with M = 32 require substantially less signal to jammer power ratio to achieve the same bit error probability.
Highlights
Frequency Hopping Spread Spectrum (FHSS) are widely employed to mitigate the interference in wireless communication systems [1,2]
The received signal is frequency-dehopped synchronously. It is difficult for the frequency synthesizers to maintain phase coherence between successive hops over a wide hop bandwidth and it is impossible to perform differential detection within one hop using fast frequency hopping, so FHSS systems use noncoherent M-ary Frequency Shift Keying (MFSK) modulation schemes
An intelligent jammer usually reduces the effectiveness of FHSS, this effectiveness can be maintained through the use of Error Control (EC) codes
Summary
Frequency Hopping Spread Spectrum (FHSS) are widely employed to mitigate the interference in wireless communication systems [1,2]. FHSS systems with partial band interference require proper combination of spread spectrum modulation, error correcting code, diversity and decoding method for better performance. In this study Reed Solomon (RS) codes are employed in a standard error correction role to provide some AntiJamming (AJ) capability.
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