Apparatus for generating orthogonal sequences

Details Apparatus for generating orthogonal sequences Apparatus for generating orthogonal sequences

1989-08-28

1990-07-03

Cangialosi, Salvatore

Pulse or digital communications

Repeaters

Testing

H04L 904

Patent

active

049397451

ABSTRACT:
An apparatus for generating orthogonal sequences is disclosed which includes an M-sequence generator for providing a signal of M-sequence of which the component takes 0 or 1 and the period is N, and substitution means connected to the output of the M-sequence generator for substituting the component of the M-sequence. The substitution means substitute the component with A.sub.0 e.sup.j.phi..sbsp.0 when the value of the component is 0 and with A.sub.1 e.sup.j.phi..sbsp.1 when it is 1, where each of A.sub.0 and A.sub.1 is a positive real number, and the substitution is performed so that a trigonometric function f.sub.1 (.phi..sub.1 -.phi..sub.0) having a phase of (.phi..sub.1 -.phi..sub.0) is a ratio of two functions f.sub.2 (A.sub.1 /A.sub.0) which is a quadratic function of A.sub.1 /A.sub.0 with a coefficient of a linear function of N and f.sub.3 (A.sub.1 /A.sub.0) which is a linear function of A.sub.1 /A.sub.0 with a coefficient of a linear function of N, whereby the orthogonal sequence is generated from the substitution means.

REFERENCES:
patent: 4403331 (1983-09-01), Halpern et al.
patent: 4685132 (1987-08-01), Bishop et al.
patent: 4872200 (1989-10-01), Jansen

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