Title :
Efficient pilot patterns for channel estimation in OFDM systems over HF channels
Author :
Garcia, M. Julia Fernandez-Getino ; Páez-Borrallo, José M. ; Zazo, Santiago
Author_Institution :
Dept. de Senales Sistemas y Radiocommun., Univ. Politecnica de Madrid, Spain
Abstract :
In this paper, the distribution of pilot symbols in the time-frequency lattice of a multicarrier system for HF communications has been analysed. The pilot density of an OFDM modem based on the HFDL standard can be reduced, so the data rate can be about 3600 bit/s. An hexagonal pilot pattern has been proposed and compared with rectangular geometries. Hexagonal distribution of the pilots is optimum in terms of sampling efficiency and it provides better performance in terms of BER
Keywords :
OFDM modulation; data communication; error statistics; estimation theory; mobile radio; optimisation; packet radio networks; signal sampling; time-frequency analysis; BER; HF channels; HFDL standard; OFDM modem; OFDM systems; channel estimation; hexagonal distribution; hexagonal pilot pattern; multicarrier system; optimisation; performance; pilot density; sampling efficiency; time-frequency lattice; Bit error rate; Channel estimation; Fading; Geometry; Hafnium; Lattices; Modems; OFDM; Sampling methods; Time frequency analysis;
Conference_Titel :
Vehicular Technology Conference, 1999. VTC 1999 - Fall. IEEE VTS 50th
Conference_Location :
Amsterdam
Print_ISBN :
0-7803-5435-4
DOI :
10.1109/VETECF.1999.797327
