Multiplex communications – Generalized orthogonal or special mathematical techniques – Plural diverse modulation techniques
Reexamination Certificate
2005-10-11
2005-10-11
Kizou, Hassan (Department: 2662)
Multiplex communications
Generalized orthogonal or special mathematical techniques
Plural diverse modulation techniques
C370S208000
Reexamination Certificate
active
06954422
ABSTRACT:
In comb-form spectrum communication systems using repeated complementary sequence modulation, a transmitting signal is constituted by assigning one set of N auto-complementary sequences to each user, where N is an integer equal to or higher than 2, and by transforming the N sequences to N repeated signals which have comb-form spectra without overlapping in frequency with one another with a method of repeating each sequence of the set of auto-complementary sequences a plurality of times, and by assigning the N complementary sequences with auto-complementary sequence characteristics to the N comb-form spectra. Thus, the near-far problem is solved by making the cross-correlation between a signal input to a user's station but addressed to another station and the user's reference code sequence, zero.
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Naoki Suehiro and Noriyoshi Kuroyanagi “Multipath-Tolerant Binary Signal Design for Approximately Synchronized CDMA Systems Without Co-Channel Interference Using Complete Complementary Codes” Mar. 19, 1998, pp.: 43-48.
Kuroyanagi Noriyoshi
Suehiro Naoki
Kizou Hassan
Koda & Androlia
Kuroyanagi Noriyoshi
Levitan Dmitry
Suehiro Naoki
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