Title :
Throughput performance of CDMA-ALOHA in S-band land mobile satellite and stratospheric platform channels
Author :
Nakanishi, Tsukasa ; Ikegami, Tetsushi
Author_Institution :
Dept. of Electron. & Commun., Meiji Univ., Kawasaki, Japan
Abstract :
The throughput performance of mobile satellite communications using the unslotted-CDMA-ALOHA system is examined. Computer simulation is carried out using measured propagation data, and throughput performances for the different propagation characteristics are compared. The packet delay performance is evaluated along with the altitude of satellite when ARQ (automatic repeat request) scheme is introduced for error control. The simulation result shows that the short packet length raises the efficiency of mobile satellite communications. When ARQ is applied, the delay performance depends on the propagation condition in an urban channel, whereas the performance in a suburban channel is consistent with the offered traffic
Keywords :
UHF radio propagation; access protocols; atmospheric electromagnetic wave propagation; automatic repeat request; code division multiple access; delays; fading channels; land mobile radio; mobile satellite communication; multiuser channels; packet radio networks; 2.1 GHz; ARQ scheme; AWGN channel; CDMA-ALOHA; S-band; UHF; automatic repeat request; computer simulation; high elevation angle propagation measurements; land mobile satellite channels; measured propagation data; mobile satellite communications; offered traffic; packet delay performance; propagation characteristics; satellite altitude; scattering; short packet length; stratospheric platform channels; suburban channel; throughput performance; unslotted-CDMA-ALOHA system; urban channel; Automatic repeat request; Communication system traffic control; Computational modeling; Computer simulation; Error correction; Performance evaluation; Propagation delay; Satellite communication; Throughput; Traffic control;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2000. PIMRC 2000. The 11th IEEE International Symposium on
Conference_Location :
London
Print_ISBN :
0-7803-6463-5
DOI :
10.1109/PIMRC.2000.881587
