Now showing items 1-7 of 7
All-optical CDMA with bipolar codes
A method for the transmission and detection of bipolar sequences in a unipolar system is presented. It allows all-optical implementation, in noncoherent optical CDMA systems, of the bipolar codes that have been developed ...
Demonstration of all-optical CDMA with bipolar codes
Using a fiber-based testbed, we experimentally verify that the advantageous correlation properties of bipolar spread-spectrum codes can be preserved in an optical channel using direct detection and all-optical encoder/decoders. ...
A multiuser receiver for code division multiple access communications over multipath channels
A multiuser communication system is considered where K users share a channel with multipath propagation by using code division for multiple access. Data modulation is carried out by binary phase shift keying and direct ...
Cyclic spreading codes for CDMA systems
In this paper, we propose a CDMA system using cyclic convolutional matched filter. The multiple access interference in this system is small under arbitrary relative delays
Joint multipath-Doppler diversity in fast fading channels
We present a new framework for code-division multiple access (CDMA) communication over fast fading mobile wireless channels. The performance of the RAKE receiver, which is at the heart of existing CDMA systems, degrades ...
Tracking Fading Multipath Channel Parameters, in CDMA Systems, Using a Subspace-based Method - An Implementation Perspective
In this paper, we evaluate several implementation issues in the application of subspace based methods to tracking channel parameters in code division multiple access (CDMA) communication systems, in the presence of multipath ...
Time-Selective Signaling and Reception for Communication over Multipath Fading Channels
The mobile wireless channel affords inherent diversity to combat the effects of fading. Existing code division multiple access (CDMA) systems, by virtue of spread-spectrum signaling and RAKE reception, exploit only part ...