Error performance of chaotic digital code-division multiple access (CDMA) systems

Chaotic digital code-division multiple access ((CD)(2)MA) systems are new t ypes of communication systems using chaotic carriers. (CD)(2)MA had found a pplications in both wireless and other communication systems. In this paper we study the error performance of chaotic digital code-division multiple a ccess ((CD)(2)MA) systems used in both wireless environment and cable netwo rks. We present first the details of the interleave mode of the (CD)(2)MA. When a (CD)(2)MA system works in the interleave mode, each of its transmitt ers only transmits signals during a portion of the bit duration of the mess age signal. The total interference level is thus reduced which in turn incr eases the channel capacity. The relationship between the bit error rate (BE R) and the interleave rate is studied in both the synchronous (CD)(2)MA sys tem used in cable systems, and the asynchronous (CD)(2)MA system used in wi reless environments. Our simulation results show that in a cable system the synchronous (CD)(2)MA system can support 1.5 times more channel capacity t han synchronous CDMA systems, and double the channel capacity of CDMA syste ms in wireless environments.