Continuously adjusted-bandwidth discrete-time phase-locked loop

Details Continuously adjusted-bandwidth discrete-time phase-locked loop Continuously adjusted-bandwidth discrete-time phase-locked loop

1997-06-09

2000-04-25

Kizou, Hassan

Multiplex communications

Communication over free space

Combining or distributing information via code word channels...

370514, 375376, H04B 7216, H04J 306

Patent

active

06055231&

ABSTRACT:
A continuously adjusted bandwidth phase-locked loop is used by a B-CDMA.TM. receiver to correct for any deviation, or offset, that may exist between the received radio frequency (RF) carrier signal and the frequency of the first stage LO that converts the received RF carrier signal to an intermediate frequency (IF). The PLL in the receiver includes a filter with an adjustable bandwidth. A wider bandwidth is used during initial acquisition of the received signal. After the PLL has acquired the received carrier signal using the wider bandwidth, the bandwidth of the filter is gradually narrowed to provide a low steady-state error.

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