Processing Gain of Dynamic Spectrum Anti-Jamming Systems

Dynamic Spectrum Anti-Jamming (DSAJ) is a new system of anti-jamming communications. By employing the opportunistic spectrum access concept of cognitive radio, DSAJ treats subbands in its entire system bandwidth as "spectrum holes", where there is no jamming or the power of jamming is below a particular threshold. Transmit frequencies are determined via real-time spectrum hole detection. System parameters are adjusted during the communication process according to the variations of jamming in the spectrum holes. These measures minimize the detriment of jamming and provide robust anti-jamming capability for the DSAJ system. Processing gain of DSAJ is analyzed and compared with the conventional frequency hopping (FH) over various types of jamming. Results show that significant improvement can be obtained by DSAJ.