2005/1/28 Seminar Student：Future Master CCY Advisor：Doctor Yung An Kao
Outlines • Introduction • Case Discussion • Simulation • Conclusion
Case Discussion(1) We have found that there is a large error in SFO estimation. WHY??? We take the following example to find out th- e problem. Environment: Trms, Ts=50; CFO=0.01; SFO=500Hz
Case Discussion(2) In this simulation, we used the 23th and 24th sub-carrier which have MAX signal energy. However, we would get a wrong estimation- 330 symbol.
Simulation Environment • SNR=20dB • 600 OFDM symbol, 1200 times • SFO=500; CFO=0.01 • No channel (each sub-carrier is equal energy) • We used the 26th and -26th sub-carrier in first figure. In second figure, we used the -26th and -25th sub-carrier.
Conclusion • We should use the sub-carriers that are not adjacent. • We could not only select the sub-carriers that have MAX signal power.