SPACE DIVERSITY HOPPER FOR DIGITAL DATA TRANSMISSION
Original Publication Date: 1990-Mar-01
Included in the Prior Art Database: 2001-Nov-13
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.