RT Journal Article ID 1786e6421ea1e7d5 A1 Hameed, Abbas Salman T1 HIGH DATA RATE OF A NOVEL MODULATION SCHEME BASED ON ORTHOGONAL CHAOTIC SIGNALS JF Telecommunications and Radio Engineering JO TRE YR 2016 FD 2017-02-16 VO 75 IS 18 SP 1657 OP 1663 K1 chaotic map K1 orthogonal code K1 direct sequence spread spectrum system AB In a mobile environment and at high data rate transmission, channel makes highly hostility. This paper presents multi-orthogonal code modulation (MOCM) as a novel spread spectrum modulation scheme for spreading a transmission system to combat the channel effects and it is suitable for high data rate communications. This scheme uses an orthogonal chaotic signal to modulate and spread the information; therefore, a good information security is produced. The obtained results in noisy channel demonstrated the superiority of using MOCM compared with using traditional PSK for direct sequence spread spectrum (DS-SS); MOCM achieves a significant improvement in terms of bit error rate (BER) and data transmission rate. PB Begell House LK https://www.dl.begellhouse.com/journals/0632a9d54950b268,04a7c6393b5e429f,1786e6421ea1e7d5.html