Title :
Uplink and downlink experimental CDMA overlay of GSM network in fading environment
Author :
Widdowson, T. ; Noel, L.
Author_Institution :
British Telecom Res. Labs., Ipswich, UK
fDate :
8/19/1999 12:00:00 AM
Abstract :
A broadband 64 kbit/s DS-CDMA overlay in the same frequency space as a GSM signal has been implemented experimentally in a fading environment. With a single CDMA user, error-free operation of both systems was demonstrated over a 39 and 58 dB dynamic range for the unlink and the downlink, respectively. The work utilised a novel CDMA receiver architecture that enabled a 30 dB digital notch filter to be applied at RF. This represents the first experimental demonstration of a true GSM network overlay in a realistic radio channel
Keywords :
cellular radio; code division multiple access; digital filters; digital radio; error statistics; fading channels; interference suppression; notch filters; phase shift keying; radio networks; spread spectrum communication; BER; BPSK; CDMA receiver architecture; GSM network; bit error rate; broadband DS-CDMA overlay; digital notch filter; downlink CDMA overlay; error-free operation; fading environment; radio channel; uplink CDMA overlay;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19990994
