Browse Prior Art Database

SPACE DIVERSITY HOPPER FOR DIGITAL DATA TRANSMISSION

IP.com Disclosure Number: IPCOM000005877D
Original Publication Date: 1990-Mar-01
Included in the Prior Art Database: 2001-Nov-13

Publishing Venue

Motorola

Related People

Authors:
Daniel R. Tayloe

Abstract

A digital TDMA system such as GSM is capable of full duplex transmission of speech and voice. Field tests per- formed in England, France and Italy show that 50% of the received signals experience delay spreads of less than 20 - 30% of the coherence bandwidth. This means that flat (nonfrequency selective) fading of such channels is a normal occurrence. To reduce the effect of this problem, the use of frequency hopping was proposed.