Es. Warner et al., SPLIT SPREAD-SPECTRUM TECHNIQUE FOR FLEXIBLE USE OF FREQUENCY BANDS, IEE proceedings. Radar, sonar and navigation, 141(2), 1994, pp. 65-74
The paper investigates methods to minimise interference between spread
-spectrum (SS) radio-location systems and other radio services. Method
s to control the power spectral density (PSD) of SS signals are review
ed. A novel technique, called 'split-signal', is described which minim
ises mutual interference. The technique exploits the noncontinuous use
of the radio spectrum by splitting the SS signals into several lower-
rate, narrower-bandwidth components. These are transmitted independent
ly in gaps in the radio spectrum and recombined at the receiver. It is
shown, by analysis and simulation, that the performance of split-sign
al SS radio-location systems in comparable to that of conventional wid
eband SS systems.