Title :
Collision-recovery method for collided OFDM based packets
Author :
Hou, Yafei ; Hase, Tomohiro
Author_Institution :
Res. Center of Inf. & Commun. Syst., Ryukoku Univ.
Abstract :
We present an effective method of collision recovery for orthogonal frequency division multiplexing (OFDM)-based communications. For the OFDM system, the modulated message data can be demodulated using the partial time-domain OFDM symbol. Therefore, the partial time-domain symbol can be adopted to reconstruct the whole OFDM time-domain symbol with estimated channel information. This property can be utilized to recover packets from the collisions. Since most collisions are cases in which a long packet collides with short packets, the collided part is assumed to be short. The simulated results show that the method can recover all packets with different specific probabilities and can be developed to solve the problem of hidden terminals.
Keywords :
OFDM modulation; channel estimation; channel information estimation; collided OFDM based packets; collision-recovery method; orthogonal frequency division multiplexing; partial time-domain OFDM symbol; Ad hoc networks; Delay; Informatics; Multiaccess communication; Multiuser detection; OFDM modulation; Spread spectrum communication; Throughput; Time domain analysis; Wireless communication;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2008. PIMRC 2008. IEEE 19th International Symposium on
Conference_Location :
Cannes
Print_ISBN :
978-1-4244-2643-0
Electronic_ISBN :
978-1-4244-2644-7
DOI :
10.1109/PIMRC.2008.4699526