Title :
A hybrid CDMA-FDMA indoor microcellular scenario
Author :
Paliatsos, A. ; Kanatas, A.G. ; Constantinou, P.
Author_Institution :
Dept. of Electr. & Comput. Eng., Nat. Tech. Univ. of Athens, Greece
Abstract :
An indoor communication channel is characterised by large propagation losses, slow time variations, a multipath nature and fading. We present a new cellular concept for indoor communications. A concentric circular model is the basic cell structure which consists of two or three concentric zones, operating in different frequencies, under the CDMA environment. Each user of this CDMA system employs a direct sequence spread spectrum waveform and does not occupy the entire allocated spectrum of the cell, but occupies a part of it, corresponding to each of the two or three frequency zones. Via a geometric analysis of the cell, we derived formulas for the system capacity and for the performance of this new cellular structure
Keywords :
channel capacity; code division multiple access; fading; frequency division multiple access; indoor radio; land mobile radio; multipath channels; pseudonoise codes; radiowave propagation; spread spectrum communication; cell structure; concentric circular model; concentric zones; direct sequence spread spectrum waveform; fading; formulas; frequencies; frequency zones; geometric analysis; hybrid CDMA-FDMA system; indoor communication channel; indoor microcellular communications; multipath; propagation losses; slow time variations; system capacity; system performance; Base stations; Buildings; Floors; Frequency; Indoor communication; Mobile communication; Multiaccess communication; Radio spectrum management; Spread spectrum communication; Telephony;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 1994. Wireless Networks - Catching the Mobile Future., 5th IEEE International Symposium on
Conference_Location :
The Hague
Print_ISBN :
90-5199-193-2
DOI :
10.1109/WNCMF.1994.529463
