Security Enhancement of Fhss Transmission System Using Hopping Sequence and its Compliment (CHS-FHSS)
Shahid Latif, Muhammad Sajid Kamran, Rahat Ullah, Abou Bakar Nouman, It Suit · 2013
Abstract: Spread Spectrum is a modulation technique that transmits the original information signal on a considerable larger bandwidth than the bandwidth (frequency contents) of the original information signal. In Spread Spectrum the signal of specific bandwidth is spread in the frequency domain, resulting in a signal with wider/larger bandwidth such that the new bandwidth is much larger than the original frequency spectrum. Frequency Hopping Spread Spectrum (FHSS) is one of the fundamental techniques of the Spread Spectrum, in which the carrier frequency does not remain fixed to the specified band of the frequency, but it changes from one frequency to the other at every instant of time, normally it changes thousands time in a second. In FHSS the spreading of the bandwidth is achieved by selecting different carrier frequencies for information signal with the help of hopping sequence. Among the various FHSS advantages, one is the inherent transmission security. In this particular paper we are taking under the consideration a proposed algorithm which results in enhancement of the transmission security by using hopping sequence and its compliment in FHSS technology. In this proposed algorithm 3-bit code is considered as the hopping sequence, but any other code rather than that may be used.