Title :
Throughput analysis for a packet radio network using rate adaptive OFDM signaling
Author :
Ye, Zhong ; Saulnier, Gary J. ; Vastola, Kenneth S. ; Medley, Michael J.
Author_Institution :
Dept. of Electr. Comput. & Syst. Eng., Rensselaer Polytech. Inst., Troy, NY, USA
Abstract :
This paper analyzes the throughput for an adaptive packet radio network (PRN). The proposed adaptive OFDM spread spectrum (OFDM-SS) system can trade off system processing gain (i.e. user data rate) for transmission quality under changing channel conditions. Classic throughput analysis for fixed and random access schemes is extended for this proposed adaptive PRN. The focus is on pure-ALOHA and nonpersistent CSMA (NP-CSMA) systems. The paper introduces a method to analyze network throughput with variable packet durations due to variable user data rate. The large improvement from the adaptive system compared to the conventional fixed rate counterpart is demonstrated by various mobile user population profiles and radio propagation path loss models
Keywords :
OFDM modulation; access protocols; land mobile radio; packet radio networks; radiowave propagation; spread spectrum communication; telecommunication signalling; OFDM-SS system; adaptive OFDM spread spectrum; adaptive packet radio network; channel conditions; fixed access; mobile user population profile; network throughput; nonpersistent CSMA; packet durations; packet radio network; pure-ALOHA; radio propagation path loss model; random access; rate adaptive OFDM signaling; system processing gain; throughput analysis; transmission quality; user data rate; Adaptive systems; Jamming; Military computing; Mobile computing; Multiaccess communication; OFDM; Packet radio networks; Signal analysis; Spread spectrum communication; Throughput;
Conference_Titel :
Communications, 1999. ICC '99. 1999 IEEE International Conference on
Conference_Location :
Vancouver, BC
Print_ISBN :
0-7803-5284-X
DOI :
10.1109/ICC.1999.767993
