Simulation and comparison between slow and fast FH BPSK spread spectrum using Matlab

الملخص EN

This paper investigates the properties and applications ofFrequency Hopping Spread Spectrum (FHSS).

FHSS is radio communication technique by which the sender of information sends the data on a radio channel, which changes the frequency of transmission based on a predetermined sequence of code.

The FHSS has many advantages over traditional modulation methods, it can overcome fading, multipath channels and interferences.

Hence the interception becomes difficult.

This security feature makes FHSS more preferable for military applications.At the receiver side, the signal is demodulated by the same carrier signal for which frequency changes by the same code sequences used by the sender.This paper presents two types of FHSS, slow and fast.

The simulation procedures of both types were implemented and applied on Frequency Hopping/Binary Phase Shift Keying (FH/BPSK) spread spectrum system using MATLAB.

The simulation sequences for fast and slow frequency hopping is the same in number and frequencies of spreading carriers and both used BPSK traditional modulation type.The comparison results based on their power spectral density show that the fast frequency hopping is more resistive to noise the slow one.