Performance of Frequency-Hopping Spread-Spectrum Mobile Radio Systems

Performance comparison of different spread-spectrum signaling schemes for cellular mobile radio networks

Signal Anti-Jamming Through Encrypted Spreading Codes Based On Frequency Hopping Spread Spectrum

Now a days is fully digitalized time and communication is the one of the most important part in our modern life [1]. Everywhere digital system are present like railway, radar, satellite, missile launchers, GPS, Wi-Fi, radio transmission, cellular mobile communication, vehicles, sensors, etc. digital signal play very important role in digital communication system for assessment of signal securit...

Feasibility of Adaptive Transmission for Multicarrier and Frequency Hopping Mobile Radio Systems

We address feasibility of adaptive transmission for rapidly varying fading channels encountered in mobile communication systems. Due to rapid channel variations and the feedback delay, implementation of adaptive transmission in these channels requires accurate prediction of future channel conditions. We describe the design and performance of adaptive transmission methods enabled by the Long Ran...

BER Performance Analysis of Frequency-Hopping and Direct-Sequencing Spread Spectrum for Cognitive Radio Networks

Cognitive radio is an encouraging technology for future wireless communication networks. Due to the rapid increase in wireless services, the RF spectrum is going through a scarcity problem. This has forced mobile operators to participate in multimillion dollar auctions to reserve some spectrum resources. Cognitive radio tries to solve this scarcity problem by effectively using the unused portio...

Correlation Effects of Frequency Hopping Diversity Systems in Indoor Mobile Communications Environments

AbsuactFrequency-Hopping (FH) techniques in conjunction with coding have been proposed for indoor radio systems based on the fact that FH behaves as an intrinsic frequency diversity technique. In this paper we assess the performance of a FH-BPSK for other situations not previously considered in the literature. In particular, the effects of having a non-null correlation coeffiiient in function o...