info
Characteristic information about carrier synchronizer
Description
returns a structure containing characteristic information for the infostruct
= info(carrSynch
)CarrierSynchronizer
System object™.
Examples
Determine Carrier Synchronizer Loop Parameters
Create a carrier synchronizer object.
csync = comm.CarrierSynchronizer;
Determine the normalized pull-in range, the maximum frequency lock delay, and the maximum phase lock delay by using the info
method.
syncInfo = info(csync)
syncInfo = struct with fields:
NormalizedPullInRange: 0.0628
MaxFrequencyLockDelay: 1.5787e+04
MaxPhaseLockDelay: 130
The normalized pull-in range is 0.0628 rad/sec. Convert the pull-in range to Hz. This represents the maximum normalized frequency offset that can be corrected by the carrier synchronizer.
foffsetmax = syncInfo.NormalizedPullInRange/(2*pi)
foffsetmax = 0.0100
The time to acquire a frequency lock is 15787 s, and the time to acquire a phase lock is 130 s.
The overall acquisition time, Tlock
, is well approximated by the sum of the frequency and phase lock terms.
Tlock = syncInfo.MaxFrequencyLockDelay + syncInfo.MaxPhaseLockDelay
Tlock = 1.5917e+04
Input Arguments
carrSynch
— System object to get information from
System object
System object to get information from.
Output Arguments
infostruct
— Structure containing object information
struct
Structure containing these fields with information about the System object.
NormalizedPullInRange
— Normalized pull in range
scalar
Normalized pull in range in radians, returned as a scalar.
NormalizedPullInRange
is the largest frequency offset
(rad), normalized by the loop bandwidth, for which the synchronizer can acquire
lock.
MaxFrequencyLockDelay
— Maximum frequency lock delay
positive integer
Maximum frequency lock delay, returned as a positive integer.
MaxFrequencyLockDelay
is the number of samples required for
the synchronizer to acquire frequency lock.
MaxPhaseLockDelay
— Maximum phase lock delay
positive integer
Maximum phase lock delay, returned as a positive integer.
MaxPhaseLockDelay
is the number of samples required for the
synchronizer to acquire phase lock.
Data Types: struct
Version History
Introduced in R2015a
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