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Signals in HF radio channels are suffered from the effect of delay spread, time-varying interference and additive Gaussian noise. The performances of two differential modulation methods FDDD and TDDD for OFDM system are analyzed in this paper. By analysis and simulations, the relationship of the subcarrier bandwidth and BER is demonstrated, which shows that the selection of optimal subcarrier bandwidth...
Digital broadcasting signal has the unique advantages for wireless location. In this paper, the pseudo-range measurement method based on OFDM signals is introduced. A mathematical model for wireless location and tracking is presented, which exploits the feature of continuous signal transmission at a fixed rate in digital broadcasting systems. After analyzing the disadvantage of classical particle...
Orthogonal frequency division multiplexing (OFDM) modulation needs better synchronization performance than conventional single carrier modulation schemes since the former is very sensitive to time and frequency variations. So a ranging technology can be established on highly precise timing measurements of OFDM synchronization. The principles of ranging based on frame synchronization is studied that...
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