Performance evaluation of CSK spread spectrum Boomerang system

In this paper, the spread-spectrum (SS) Boomerang system using code-shift-keying (CSK) is proposed. CSK is one of the orthogonal modulation systems which transmit an orthogonal code sequence according to information bits. The conventional SS-Boomerang system which used direct-sequence spread-spectrum (DS/SS) technique applies the spreading sequence to every information bits. However, since the proposed SS-Boomerang system uses CSK, it can transmit more than one information with one spreading sequence. It is able to improve information transmission rate. Moreover, it is shown that the bit error rate and distance ranging performance of the proposed system is superior to that of the conventional system.