5733365640

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bitdetect2/Bit Detector

Cl>

Inl

thres

thres

sthres

	nw;word
trires sthres	bitvw
	bitdetect poiwiiy
&cqt	M&Jidily
SCHTI	nwb\i

Catch Frame

—KD

Out2

Bit Detector

-] Out2

Lkid

[isdescram

Subsystem (mask)

Perform bit edge detection on tracked signal.

Navigation word parity check, preamble matching and data validity currently only for testing purposes (words need to be aligned).

Parameters

sthres

Out3^

*<

[yalidity]

Frort

Navigation data descrambling

bitdetect2

_ □

Gotol

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Terminator

X

nayword

simin

From

Workspace

navword

bitvaJ

polarity

yalidity

Bit Detector

nayword

bitvaJ

bitvaJ

polarity

yalidity

[isdescrambled]

Frorn

Controller

Product

navbit

na'

Enabled Descra

NAVSTAR-GPS Satellite błock name: PRN1

Bit transition threshold:

300

Polarity inversion threshold:

10

Acquistion time in seconds:

lo.OOl

Sample time:

11/5e6

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