The document discusses reducing radar side lobes through the use of complementary codes. It compares the autocorrelation and ambiguity functions of Walsh codes to complementary codes. The results show that complementary codes produce almost zero side lobes compared to other codes like Walsh codes, allowing for easier target detection and location with less false alarms. Computational experiments were performed in MATLAB to evaluate peak and integrated side lobe levels of different codes. Complementary codes exhibited the lowest side lobe characteristics.