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Previous work on polyphase complementary codes is reviewed, and a number of new results are presented including additional kernels and lengths. Generating methods from other binary and polyphase sequences are given and negative results of other existence searches reported. Advantages of specialized forms for radar and Loran-C are discussed, including complementary Barker codes. A table of known lengths of pairs, triads and quads of sequences is given.
R. Frank (Sat,) studied this question.
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