Robustness of quadrature sampled complementary codes

Complementary codes, which use multiple binary sequences, exhibit the most desirable characteristics in that they achieve perfect sidelobe cancellation in radar signal design applications. In contrast, even in a noiseless situation, all other coding methods result in undesirable sidelobes. For a given number of chips, a variety of complementary code sets can be formed; this is a result of manipulating the number of subsequences and the number of chips in each subsequence. There are, however, no published results to judge the relative resolution performance of such code sets due to the errors introduced by quadrature sampling. The results provided in the present paper highlight the effect of quadrature sampling errors on the resolution properties of a variety of complementary coded waveforms. It is also concluded from the results that increasing the number of subsequences with a corresponding reduction in the number of chips per subsequence improves the resolution performance