×

System of orthogonal code generators, radios provided with a code generator and code generators of such a system

  • US 4,872,200 A
  • Filed: 04/15/1988
  • Issued: 10/03/1989
  • Est. Priority Date: 04/17/1987
  • Status: Expired due to Fees
First Claim
Patent Images

1. In a system of orthogonal code generators having counting means comprised of a running counter for generating a running count, and code generators for generating respective code sequences in response to the count, the improvement comprising:

  • a plurality of m orthogonal code generators j (j=1, . . . , m) each comprised of Q counter-reading directed subcode generators i (i=1, . . . , Q) each generating a respective subcode which together represent the code sequence, wherein a subcode generator subsequently generates subcode-representing numbers gi, where gi

    Ni -1 and Ni represents a fixed value and a subcode generator is comprised of a pseudo-random generator and an adder unit, the pseudo-random generator generating from the running counter reading and a key S, a pseudo-random sequence of numbers which are supplied to the adder unit, and the adder unit adding a number Ai modulo-Ni to the second-last-mentioned numbers to obtain the numbers gi.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×