Levanon, Cohen, and Itkin Figure 13. Spectrums of the complementary base-band signal with rectangle element shape (top) and GWS shape followed by LPF (bottom). response are the two small negative sidelobes on the immediate sides of the mainlobe. Their relative height is -34.7 dB. Figure 15 shows the corresponding delay-Doppler response (dB scale) with interpulse weight window chebwin(64,62). The response is normalized; hence the mainlobe peak value is 0 dB. Clearly marked is the immediate sidelobe on the delay axis, with a peak of -34.7 dB. The x = 62.5 reading on the data tip represents normalized delay of τ / tb = 1.93. The value x = −34.5 on the next data tip implies τ / tb = −1.07. CONSTANT AMPLITUDE WAVEFORMS GWS representation of the phase-coded complementary pair reduced the spectral sidelobes and maintained the cancellation of the ACF near-sidelobes. The remaining drawback is the created variability in amplitude. An expected question is how well constantamplitude, spectrally efficient conversions would maintain the MARCH 2017 Figure 14. Periodic autocorrelation of a 26 element complementary pair. Each element shape was created by 4 samples/element GWS followed by LPF. IEEE A&E SYSTEMS MAGAZINE 47