This invention publishes an implement method of ternary spread spectrum coding in CDMA system. This spread spectrum code group consists of basic pulse of normalized amplitudes and duration of 1 and polarity; first, giving the number of basic pulses and the length of zero correlation zone (ZCZ) for the LA (large Area) sequence, and generating a basic sequence s that its length is N; then generating a binary orthogonal sequence group, and extending the binary orthogonal sequence to ternary sequence; finally, multiplying the basic sequences by each of the ternary sequence group as bit, thereby obtaining ternary spread spectrum sequence group A. It is important that basic sequence is constructed by setting relationship between each of pulse interval delta 1 and zero correlation zone to computing pulse interval of the sequence. |