A multiuser communication scheme which is a hybrid of Walsh code with DCSK and CDSK is proposed to improve low data\ntransmission rate of Differential Chaos Shift Keying (DCSK), poor bit error ratio (BER) performance of Correlation Delay Shift\nKeying (CDSK), and disadvantage of orthogonality in traditional multi user DCSK. It not only overcomes the disadvantages of\nDCSK and CDSK, but also has better performance than CDSK and higher transmission data rate than DCSK. It has been proved\nthat the novel multiuser CDSK-DCSK has better properties than traditional Multiple Input Multiple Output-Differential Chaos\nShift Keying (MIMO-DCSK) and Modified-Differential Chaos Shift Keying (M-DCSK). Also the multiuser interference is greatly\nsuppressed due to the orthogonality of Walsh code.
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