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Digital Adaptive Equalizer

Digital Adaptive Equalizer. Qin Zhang, Ph.D. System Block. C_II. D_II. X. X. I Out. I Data. D_QI. C_QI. +. X. X. D_IQ. C_IQ. Slicer. Q Out. I Data. X. X. +. C_QQ. D_QQ. X. X. Slicer. A Digital Adaptive Equalizer. Digital PLL. f e. f in. K d. +. f o. W_z. a. K v.

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Digital Adaptive Equalizer

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  1. Digital Adaptive Equalizer Qin Zhang, Ph.D

  2. System Block

  3. C_II D_II X X I Out I Data D_QI C_QI + X X D_IQ C_IQ Slicer Q Out I Data X X + C_QQ D_QQ X X Slicer A Digital Adaptive Equalizer

  4. Digital PLL fe fin Kd + fo W_z a Kv Ka Z + Z + + Z a_z Z delay_z Nco_z f_z

  5. LMS Adaptive Equation C(k): equalizer coefficient vector; k : time count at symbol rate;  : adaptive control parameter; E(k): error output from slicer; X(k): equalizer input (I data and Q data); C(k+1)=C(k)- E(k)•X(k)

  6. The Difference You Can Make! 7 dB Difference !

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