Abstract :
This paper is concerned with introducing a robust software defined radio system that
adaptively controls the beam pattern of a linear antenna array. This adaptation is performed
for cancellation of interference signals and simultaneous extraction of the signal of interest
(SOI) to correctly recognize its modulation type in order to take the appropriate counter
action later. This counter action varies among signal analysis, monitoring, jamming…etc.
This capability is achieved when the SOI and interference signals are either narrowband or
wideband. Interference signals may be mutually correlated or mutually uncorrelated with the
SOI. Computer simulations using an additive white Gaussian noise (AWGN) channel show
that the proposed software defined radio system succeeds to completely extract the SOI and
correctly recognize its modulation type at 10 dB signal to noise ratio and -3 dB signal to
interference ratio.