Accession Number : ADA317615
Title : Hardware Technologies for Robust Personal Communication Transceivers.
Descriptive Note : Final rept. 7 Jul 92-7 Jul 95,
Corporate Author : CALIFORNIA UNIV LOS ANGELES DEPT OF ELECTRICAL ENGINEERING
Personal Author(s) : Samuell, Henry ; Abldi, Asad A. ; Pottie, Gregory J. ; Rahmat-Samii, Yahya ; Gabriel, Ken
PDF Url : ADA317615
Report Date : JUL 1995
Pagination or Media Count : 294
Abstract : The overall goal of this research project is to develop low-power personal communications transceiver hardware technologies, coupled with advanced systems techniques such as antenna diversity, channel coding, and adaptive power control, for achieving robust wireless digital data transmission over multipath fading channels. A frequency hopped, spread spectrum (FH/SS), code division, multiple access (CDMA) technique was chosen over other multiple access schemes because: (a) it provides an inherent immunity to multipath fading and (b) signal processing is performed at the hopping rate, which is much slower than the chip rate encountered either in a direct sequence (1)S) CDMA or time division, multiple access (TDMA) system, thereby potentially resulting in much lower receiver power consumption. The project is organized into four major tasks: (1) System Architecture/Performance Evaluation (Prof. C. Pottie) (2) Receiver Architecture/Signal Processing (Prof. H. Samueli) (3) Analog Systems/Circuits (Prof. A. Abidi) (4) Miniature Antenna Design (Prof. Y. Rahmat-Samii)
Descriptors : *LOW POWER, *COMMUNICATION EQUIPMENT, SIGNAL PROCESSING, ADAPTIVE CONTROL SYSTEMS, PERFORMANCE TESTS, RATES, COMPUTER ARCHITECTURE, CHIPS(ELECTRONICS), SEQUENCES, CODING, RECEIVERS, ANTENNAS, FUEL CONSUMPTION, POWER, CIRCUITS, IMMUNITY, LOW RATE, ENERGY CONSUMPTION, ANALOG SYSTEMS, CHANNELS, MINIATURIZATION, MULTIPATH TRANSMISSION, SPREAD SPECTRUM, MULTIPLE ACCESS, FADING(ELECTROMAGNETIC WAVES).
Subject Categories : Electrical and Electronic Equipment
Distribution Statement : APPROVED FOR PUBLIC RELEASE