سال انتشار: ۱۳۹۱

محل انتشار: پانزدهمین کنفرانس دانشجویی مهندسی برق ایران

تعداد صفحات: ۵

نویسنده(ها):

Mostafa Mojahed – Malek Ashtar University of Technology
Ghasem Assarzadeh – Tehran university
Ebrahim Ghanavati – Amirkabir University of Technology

چکیده:

In this paper, design and simulation of the orthogonal frequency-division multiplexing (OFDM) HF modem conforming to MIL-STD-188-110B is discussed and it’s parameters are introduced. This modem is different from typical OFDM systems because of removing quadrature component(Q) by using real value OFDM(Real-OFDM). frequency offset synchronization of the this modem in the HF channel using Hilbert transform, is done by a low complexity robust algorithm that it is appropriate for implementing on the FPGA. Using this method, frequency offset can be estimated twice of the subcarrier spacing at very low signal-to-noise ratios (SNR’s) and with appropriate mean square error (MSE