Title :
An experimental TDMA indoor radio communications system using slow frequency hopping and coding
Author :
Saleh, Adel A M ; Rustako, A.J., Jr. ; Cimini, Leonard J., Jr. ; Owens, G.J. ; Roman, R.S.
Author_Institution :
AT&T Bell Labs., Holmdel, NJ, USA
fDate :
1/1/1991 12:00:00 AM
Abstract :
The general principles, implementation, and performance of a 1-Mb/s time-division-multiple-access (TDMA), slow frequency hopping and coding, 1.5-GHz radio communications system for a medium-sized office building are discussed. TDMA is provided for service flexibility and slow frequency hopping and coding for immunity against multipath fading and interference. Measurements show that, with a hallway-mounted distributed antenna system installed on one floor of the building and with the mobile unit transmitting only 1 mW of peak RF power from anywhere on that floor, only a single 384-b frame out of a total of 200000 transmitted frames suffered an unrecoverable error. This kind of performance is comparable to that of wired data modems. Similar performance was obtained from a central antenna covering the same floor. However, the required transmitted power in this case was 100 mW. Implementation issues, such as spectrum allocation, cellular subdivisions, and spectrum efficiency, are also discussed
Keywords :
cellular radio; error correction codes; frequency agility; interference suppression; time division multiple access; 1 Mbit/s; 1.5 GHz; Reed-Solomon code; TDMA indoor radio communications system; UHF; burst-error correcting block code; cellular subdivisions; coding; flexibility; hallway-mounted distributed antenna system; implementation; interference immunity; multipath fading immunity; performance; slow frequency hopping; spectrum allocation; spectrum efficiency; Antenna measurements; Fading; Floors; Indoor radio communication; Interference; Mobile antennas; Power measurement; Radio communication; Spread spectrum communication; Time division multiple access;
Journal_Title :
Communications, IEEE Transactions on
