, S.S.I.K.A. 2015. BER Performance Analysis of Frequency-Hopping and Direct-Sequencing Spread Spectrum for Cognitive Radio Networks. International Journal on Recent and Innovation Trends in Computing and Communication. 3, 5 (May 2015), 3175–3178. DOI:https://doi.org/10.17762/ijritcc.v3i5.4413.