28-07-2004 дата публикации
Номер: CN0001516929A
Принадлежит:
A searcher 105 creates a delay profile of a known symbol portion of a received base band signal by using a basic code, and a number-of-codes/kind-of-code determining unit 106 determines the number and kind of shift codes being used, on the basis of the delay profile. Correlators 108-1 to 108-n compute the correlation values between the known symbol first half of the received base band signal and the shift code. Correlators 109-1 to 109-n compute the correlation values between the known symbol second half of the received base band signal and the shift codes. A phase estimation unit 119 estimates the phase rotation per unit time by using the sum of the output signals of the correlators 108-1 to 108-n and the sum of the output signals of the correlators 109-1 to 109-n. As a result, the influence of the cross-correlation of spreading codes and the influence of noises are suppressed, so that the phase rotation between the known symbols can be estimated highly precisely to realize highly precise ...
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