Spread Spectrum is a modulation technique in which a signal is transmitted on a considerable larger bandwidth than the frequency contents of the original information. In other words, the signal of particular bandwidth is intentionally spread in the frequency domain, resulting in a signal having wider bandwidth. Here the minimum new bandwidth is much larger than the minimum required frequency spectrum. Frequency Hoping Spread Spectrum (FHSS) is one of the common forms/techniques of the Spread Spectrum, in which frequency is not remained fixed to the specified band of the frequency. Here the carrier frequency changes from one frequency to the other at every instant of time. Normally carrier frequency changes thousands time in a second. In FHSS synchronization of transmitter and receiver is necessary. In case, if the receiver is not synchronized with transmitter due to any reason, the recovery of the original information from its spread spectrum is merely impossible. To overcome this problem we propose a technique in which a code is combined and sent with the modulated signal before using the FHSS technique. Using this transmission code we can synchronize the receiver with transmitter at any instant of time. This proposed work is implemented and analyzed using MATLAB Simulation.

Synchronization delay transmission code transmitter/receiver simulation