Protected spread spectrum signal transmission system for multiple-access messages uses pseudo-random sequences as expansion codes

摘要

Pseudo-random sequences as expansion codes are newly parameterized by real physical random generators (SYM PRNG) and safely generated by cryptography. As a result, continuous code transfers are executed in the form of a code division multiple access (CDMA) code hopping for spread spectrum/CDMA. A symmetrical crypto-algorithm is used in the random generator for expansion codes.