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Apparatus for generating orthogonal sequences

  • US 4,939,745 A
  • Filed: 08/28/1989
  • Issued: 07/03/1990
  • Est. Priority Date: 09/01/1988
  • Status: Expired due to Term
First Claim
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1. An apparatus for generating an orthogonal sequence comprising M-sequence generating means for outputting a signal of M-sequence of which the component takes 0 or 1 and the period is N, and substitution means connected to an output of said M-sequence generating means for substituting the component of the M-sequence to provide an output signal as the orthogonal sequence signal, said substitution means substituting the component of the M-sequence with A0 ejφ

  • .sbsp.0 when the value of the component is 0 and with A1 ejφ

    .sbsp.1 when it is 1, where each of A0 and A1 is a positive real number, and the substitution being made in such a manner that the phase difference of φ

    1

    0 and the amplitude ratio of A1 /A0 satisfy the following condition;

    ##EQU28## where, f1 is a trigonometric function having the phase of φ

    1

    0 ;

    f2 is a quadratic function of A1 /A0 with a coefficient of a linear function of N; and

    f3 is a linear function of A1 /A0 with a coefficient of a linear function of N.

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