Accession Number : ADP007389

Title :   Demonstration of a Novel Optical Code Division Multiplex System at 800 Mchips/s,

Corporate Author : ALBERTA GOVERNMENT TELEPHONES EDMONTON

Personal Author(s) : Vethanayagam, N. ; MacDonald, R. I.

Report Date : 22 MAY 1992

Pagination or Media Count : 4

Abstract : A novel code division multiple access system using Alberta codes and complementary, correlation is demonstrated at 80OMchips/s. Completely passive optical multiplexing and demultiplexing is performed throughout. Complementary correlation allows code orthogonality because bipolar electrical signals are generated from unipolar optical ones. The correlator is implemented optoelectronically, with an array of metal- semiconductor- metal photodiodes. We show that the bit error rate performance of the system is not degraded bv the presence of multiple channels, and that zero cross talk is nominally, achieved. An unusual property, of such systems is confirmed: that the bit error rate on a channel can be reduced bN, the presence of an interfering channel if the two transmitters are not chip synchronous.

Descriptors :   *MULTIPLEXING, *OPTICAL CIRCUITS, ACCESS, ARRAYS, CHANNELS, CORRELATION, CORRELATORS, ERRORS, MULTIPLE ACCESS, ORTHOGONALITY, PHOTODIODES, RATES, SEMICONDUCTORS, SIGNALS, TRANSMITTERS, CHIPS(ELECTRONICS), CANADA.

Subject Categories : Electrooptical and Optoelectronic Devices

Distribution Statement : APPROVED FOR PUBLIC RELEASE