Title :
Throughput-delay analysis of frequency hopped NPCSMA in outdoors cellular multipath fading and shadowing channels
Author :
Hmimy, H.H. ; Gupta, Someshwar C.
Author_Institution :
Dept. of Electr. Eng., Southern Methodist Univ., Dallas, TX, USA
fDate :
28 Apr-1 May 1996
Abstract :
In this paper, the probability of packet retransmission is evaluated for SFH-NCFSK in outdoor fading and shadowing channels for macrocell structure at 800/900 MHz. The channel throughput-delay analysis for NPCSMA is evaluated and simulated for outdoor Rayleigh fading and log-normal shadowing channels. The channel throughput-delay characteristics are degraded due to fading and shadowing. A new random multiple access protocol, which combines the advantages of frequency hopping spread spectrum (FH-SS) and carrier sense multiple access (CSMA), is introduced. The system throughput-delay characteristics are analytically derived in noiseless channels and in cellular channels. Monte Carlo simulation is used to verify the analytical results
Keywords :
Monte Carlo methods; Rayleigh channels; access protocols; carrier sense multiple access; cellular radio; channel capacity; delays; digital radio; fading; frequency hop communication; frequency shift keying; log normal distribution; multipath channels; packet radio networks; random processes; spread spectrum communication; 800 MHz; 900 MHz; Monte Carlo simulation; SFH-NCFSK; UHF; carrier sense multiple access; cellular channels; frequency hopped NPCSMA; frequency hopping spread spectrum; log-normal shadowing channels; macrocell structure; noiseless channels; outdoors cellular multipath fading; packet retransmission probability; random multiple access protocol; shadowing channels; throughput-delay analysis; Access protocols; Additive white noise; Analytical models; Fading; Macrocell networks; Multiaccess communication; Radio frequency; Rayleigh channels; Shadow mapping; Spread spectrum communication;
Conference_Titel :
Vehicular Technology Conference, 1996. Mobile Technology for the Human Race., IEEE 46th
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-3157-5
DOI :
10.1109/VETEC.1996.504052
