| 摘要 |
A Rake receiver having fingers is disclosed. The Rake receiver includes frequency discriminators (110-1, 110-2, 110-3) for automatic frequency control and a combiner (205). Each finger includes a frequency discriminator (110-1, 110-2, 110-3). The combiner (205) combines outputs from the frequency discriminators (110-1, 110-2, 110-3) to output an average error signal which is fed back to the frequency discriminators (110-1, 110-2, 110-3) for removing frequency offsets from all the fingers. The combiner (205) includes an adder (207) which adds the outputs of the frequency discriminators (110-1, 110-2, 110-3), and a divide circuit which divides the combined adder output by the number of the outputs which were added together to form the average error signal. The combiner further includes a filter connected between the adder and the divide circuit. In addition, further adders are provided where each of theses adders receives the average error signal and a respective one of the outputs from the frequency discriminators in order to provide an estimate of one of the frequency offsets.
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