OFDM modem for ATM based point-multipoint systems

P. Altamura1, G.C. Cardarilli1, A. Del Re1, M. Re1
1Department of Electronic Engineering, University of Roma “Tor Vergata”, Rome, Italy

Tóm tắt

In this paper an application of the OFDM modulation to the "last mile" problem and the main algorithms involved are described. Moreover, the architectures of the most important blocks (namely modulator and demodulator) are illustrated and the design methodology is described. The system has been simulated in FPL and FXP arithmetic and a VHDL description has been automatically generated by using COSSAP. Finally the architecture has been synthesized and mapped on FPGAs.

Từ khóa

#Modems #Time division multiple access #Asynchronous transfer mode #OFDM modulation #Demodulation #Digital modulation #Optical fiber cables #Optical design #Frequency synchronization #Design methodology

Tài liệu tham khảo

sandell, 1995, Timing and Frequency Synchronization in OFDM Systems Using the Cyclic Prefix, Proc IEEE Int Symp Synchronization filiberti, 1998, A point-to-multipoint radio system concept supporting the last mile problem, First European Conference on Carrier Supply johansson, 1999, Hardware Implementation of an OFDM Synchronizer, Proc Int Symp Personal Indoor and Mobile Radio Communications 10.1109/4.962306 cimini, 1995, Analysis and simulation of a digital mobile channel using orthogonal frequency-division multiplexing, IEEE Trans Commun, com 33 10.1109/35.54342