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This paper investigates the bit error rates (BER) obtained using different filter types and the effect of amplifier distortion for RF front ends for WCDMA-UMTS mobile radio systems. Most Base Stations use Chebychev or Cauer-Chebychev filters. This paper compares the use of Bessel, Butterworth and Chebychev filters for use as single channel filters in a WCDMA-UMTS radio system. It is shown that even though Bessel filters pass more adjacent channel interference, they result in a significantly lower BER and insertion loss than the other filter types, even for amplifiers with moderate distortion levels.
Date of Conference: 15-17 Dec. 2008