L64724 LSI Logic Corporation, L64724 Datasheet - Page 144
L64724
Manufacturer Part Number
L64724
Description
Satellite Receiver
Manufacturer
LSI Logic Corporation
Datasheet
1.L64724.pdf
(294 pages)
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5.7 Carrier Recovery Loop
Figure 5.5
5-12
CAR_USWL
CAR_LWSL
Registers
16
16
CAR_SW CAR_SWR
Carrier Recovery Loop
Bit
Generator
Frequency
Dual
ADC
Sweep
Figure 5.5
consists of the following main functional elements:
Demodulator Module Functional Description
Register
Phase error detector
Digital loop filter
Phase lock detector
Frequency sweep generator
Frequency lock detector
CAR_LF_INIT
16
Interpolator/ Decimation
Register
CAR_LAMBDA_SEL
Digital Loop Filter
illustrates the L64724 Carrier Recovery Loop. This circuit
24
Register
CAR_LC
Filter
4
CAR_OPEN
Bit
CAR_MU_SEL
Register
Bit
4
CAR_PED_SEL
Phase Lock
Phase Error
Detector
Detector
Matched
Bit
Filter
Matched Filtered
I and Q samples
8 Register
CAR_LC_THSL
Output
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