| 摘要 |
<p>Since a conventional adaptive equalizer handles an update quantity control parameter mu as a fixed value, the update quantity control parameter mu is not optimized adaptively to variation of a channel state and the BER characteristic is deteriorated. Thereupon, the invention controls a parameter mu for controlling the update quantity of updating the impulse response of a channel by the adaptive algorithm operating portion 2 according to an estimated BER value, by performing a BER estimating process by the BER estimating portion 4 and performing an update quantity control parameter adjusting process by the update quantity control parameter adjusting portion 5, and increases the parameter mu so that it follows variation of a channel state in an environment where the channel state is bad and severely varies and decreases the parameter mu in a good environment where the channel state varies little, and thereby reduces deterioration in BER characteristic which could have been caused by a fact that the value of mu is not optimized adaptively to variation of a channel state. <IMAGE></p> |
