1975
DOI: 10.1109/mcomd.1975.1089046
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Why spread spectrum?

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Cited by 18 publications
(7 citation statements)
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“…If the |R -R′| and N are relatively prime for an odd period N and 2|R -R′| and N are relatively prime for an even period N, the absolute value of the cross-correlation function of these sequences is a constant 1 …”
Section: Resultsmentioning
confidence: 99%
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“…If the |R -R′| and N are relatively prime for an odd period N and 2|R -R′| and N are relatively prime for an even period N, the absolute value of the cross-correlation function of these sequences is a constant 1 …”
Section: Resultsmentioning
confidence: 99%
“…Thus, when the period N is an odd number, from Eq. (18), the V N (a) set of R(k) where the absolute value of the difference |R(i) -R(j)| between any two real numbers R(i) and R(j) (i ≠ j) is relatively prime to period N is Thus, based on the conjecture explained in Section 3, when the period N is an odd number, the absolute value of the cross-correlation function of sequences of any two elements is the constant 1 …”
Section: Generating the Orthogonal Periodic Complex Number Sequence Smentioning
confidence: 99%
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“…The system is affected little by interference except in the case of the same code sequence. Since the code sequence has a cryptographic function, confidentiality is high [2]. From the results of field tests, the system is found to be highly compatible with microcellular systems and to have a high frequency use efficiency.…”
Section: Cdma System and Communication Breakingmentioning
confidence: 99%
“…Spread spectrum was developed in the mid 1950s mainly as a novel form of transmission, overcoming the rigid restrictions in radio bandwidth allocation [3,4]. It is based on the idea of spreading the spectrum of the narrowband message over a much wider frequency spectrum by means of a digital code [5][6][7][8][9].…”
Section: Introductionmentioning
confidence: 99%