| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide such a code tracking loop that a bandwidth and a attenuation ratio of the loop can be maintained without changing together with an input signal power level. <P>SOLUTION: UE receives a communication signal from one of a plurality of base stations, and correlates the communication signal using a delay locked code tracking loop that estimates and tracks a channel delay. The tracking loop comprises a reference code generator for generating a reference code, an interpolator for generating timed signal versions in response to reception, and a timed signal correlator for correlating at least two of the timed signal versions with the code reference signal. The result of the correlation is used for generating an error signal. An automatic power normalization (APN) loop, that is responsive to the interpolator, generates a power error signal that normalizes the error signal. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
