Kalman filter for channel estimation in OFDM systems

Details Kalman filter for channel estimation in OFDM systems Kalman filter for channel estimation in OFDM systems

2005-12-12

2009-08-11

Liu, Shuwang (Department: 2611)

Pulse or digital communications

Receivers

Interference or noise reduction

C375S260000

Reexamination Certificate

active

07573965

ABSTRACT:
A scalar Kalman filter is applied for a Least-Square estimated value Hsat s. The filter has an input for receiving Hs, a filter equation and an out for the corrected estimated value Hskfor the kthvariable. The filter equation is Hsk=KgainSn[k] wherein: correction Sn[k]=S+Kn(Hs−S); prediction of the correction S=KaSn[k]; Kalman filter gain Kn=P/(1+P); minimum predication MSE P=Ka2Pn[k]+Kb; minimum MSE Pn[k]=P (1−Kn); and Ka, Kgainand Kbare constants.

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