Title :
A comparison of CDMA and NPCSMA for an indoor data network
Author :
Sandeep, C. ; Gupta, S.C.
Author_Institution :
General Electric Co., Schenectady, NY, USA
Abstract :
An indoor communication system using direct-sequence spread-spectrum signaling is considered. CDMA (code-division multiple-access) and NPCSMA (nonpersistent carrier-sense multiple-access) are considered as multiple-access alternatives and are compared based on their throughput and delay characteristics. The advantage of multipath diversity is illustrated. For NPCSMA and CDMA, delay and code length, respectively, restrict the number of simultaneous accesses allowable. A hybrid scheme, NPCSMA-CDMA, based on code sharing by contention, is examined. This scheme offers high capacity, without requiring very long codes or exhibiting excessive delays. Throughputs that approach that of NPCSMA are observed
Keywords :
carrier sense multiple access; code division multiple access; data communication systems; digital radio systems; diversity reception; spread spectrum communication; CDMA; NPCSMA; code sharing by contention; code-division multiple-access; delay characteristics; direct-sequence spread-spectrum signaling; diversity reception; indoor communication; indoor data network; multipath diversity; nonpersistent carrier-sense multiple-access; protocols; throughput; Access protocols; Buildings; Delay; Diversity reception; Fading; Interference; Multiaccess communication; Receivers; Spread spectrum communication; Throughput;
Conference_Titel :
Vehicular Technology Conference, 1989, IEEE 39th
Conference_Location :
San Francisco, CA
DOI :
10.1109/VETEC.1989.40160
