A new detector for optical code-division multipleaccess (CDMA) communication systems is proposed. This detector is called the chip-level receiver. Both ON–OFF keying (OOK) and pulse-position modulation (PPM) schemes, that utilize this receiver, are investigated in this paper. For OOK, an exact bit error rate is evaluated taking into account the effect of both multiple-user interference and rece...

With the concept of 3G services OCDMA is one of the important technology, that provides a very high speed communication. In this technology multiple users can communicate simultaneously to transfer different kind of data. OCDMA enables the best use of available bandwidth and the spectrum to represent a cost efficient network. But in a network there is always the requirement to increase the secu...

In this paper, we present a new architecture for an electronic implementation of an ATM switch using a technique from spread spectrum communications known as Code Division Multiple Access (CDMA). In a CDMA-based ATM switch, each output port is assigned a unique code word from an orthogonal set of code words. Each input data stream is encoded using the code word corresponding to its intended des...

Multi-carrier code division multiple access (MC-CDMA) is a promising multiple access scheme. An extremely high spectrum efficient transmission technique is required in future wireless communication systems. The use of multiple-input multiple-output (MIMO) space division multiplexing (SDM) is essential to achieve a very high speed data transmission with a limited bandwidth. In this paper, we der...