General construction of periodic complete complementary codes composed of expanded modulatable orthogonal sequences
Hideyuki Torii, N. Suehiro, Makoto Nakamura · 2002
In this paper, we propose a construction of periodic complete complementary codes composed of the expanded modulatable orthogonal sequences. Because the number of the expanded modulatable orthogonal sequences of period N/sup 2/ is infinite, the number of the periodic complete complementary codes of period N/sup 2/ is also infinite. It is already proved that the proposed sequences are periodic complete complementary codes. In the meantime Suehiro (1998) has proposed a signal design method for approximately synchronized CDMA systems without co-channel interference. In this signal design method, we can assign the proposed periodic complete complementary codes as code words to each user so that the information transmission rate is increased.