IMPROVED DETECTION IN SONAR AND RADAR BY USING PHASE SIGNALS

The shape of the transmitted pulse plays an important role in active s onar and radar applications. The advantage of using phase signals for detecting overlapped signals in nonstationary additive noise is analyz ed in this work. Approximate phase signals are constructed by means of finite-time sequences having good time-energy distribution. The prope rties of the phase signals lead to the development of a noise-power es timator insensitive to the presence of overlapped signals. The estimat or bias when using approximated phase signals is calculated.