Accession Number : AD1008984


Title :   Physically Protected Spread Spectrum Communications


Descriptive Note : Technical Report,11 Dec 2014,11 Mar 2016


Corporate Author : Wichita State University Wichita United States


Personal Author(s) : Kwon,Hyuck M


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/1008984.pdf


Report Date : 14 Apr 2016


Pagination or Media Count : 46


Abstract : This report considers a coherent (instead of noncoherent) modulation such as an M-ary phase-shift keying (MPSK) and M-ary quadrature amplitude-shift keying (MQAM) for a slow frequency hopping (FH) spread spectrum (SS) system because, recently, coherent modulation has been the candidate for a future satellite FH waveform. Then, the PI found an exact symbol error rate (SER) expression for the FH system under partial-band tone jamming (PBTJ) and Rician fading environments through analysis. In addition, the PI studied the optimal weighting coefficients for each hop interval to minimize the SER. Furthermore, the PI derived an implicit expression of the optimal PBTJ fraction ratio, which maximizes the SER of the FH system and compares the analytical results with the numerical results for verification. The results shown here can be useful for the design of future efficient game theoretic FH satellite and mobile communications systems when a coherent FH modulation is employed under severe fading as well as severe PBTJ environments.


Descriptors :   SPREAD SPECTRUM , RADIO INTERFERENCE , SATELLITE COMMUNICATIONS , FREQUENCY AGILITY , MODULATION


Subject Categories : Radiofrequency Wave Propagation
      Radio Communications


Distribution Statement : APPROVED FOR PUBLIC RELEASE