PSK Demodulator

Group: Demodulation

Demodulates a stream of PSK symbols

Parameters

AGC

Time Constant

• Description: Time to reach 63.2% towards target magnitude
• Automation reference: AGCTimeConstant
• Unit: s
• Type: real

Specification

Modulation Type

• Description: Which modulation type to use.
• Automation reference: Modulation
• Type: enumeration

Identifier	Value	Description
BPSK	BPSK	Binary Phase Shift Keying.
QPSK	QPSK	Quadrature Phase Shift Keying.
PSK8	8-PSK	8 point Phase Shift Keying.

Symbol Rate

• Description: Rate of which symbols should be generated
• Automation reference: SymbolRate
• Unit: Hz
• Type: real

Sample Rate

• Description: Rate of which samples should be generated. This must be higher than the symbol rate
• Automation reference: SampleRate
• Unit: Hz
• Type: real

Acquisition

SNR Type

• Description: How to specify the SNR threshold
• Automation reference: SNRSpecification
• Type: enumeration

Identifier	Value	Description
SNR	SNR	Signal-to-noise ratio
EbN0	Eb/N0	Energy per bit to noise power spectral density
EsN0	Es/N0	Energy per symbol to noise power spectral density

Information rate (R)

• Description: Number of information bits per symbol. A rate 1/2 code would have a rate of 0.5
• Automation reference: InformationRate
• Enablement: SNRSpecification in [EbN0, EsN0]
• Type: real

SNR Acquisition Threshold

• Description: Lowest level of estimated SNR to lock at
• Automation reference: SNRThreshold
• Unit: dB
• Type: real

SNR Loss Threshold

• Description: Lowest level of estimated SNR to unlock at
• Automation reference: SNRLowThreshold
• Unit: dB
• Type: real

SNR Estimation Time Constant

• Description: Time to reach 63.2% towards actual SNR
• Automation reference: SNRTimeConstant
• Unit: s
• Type: real

Carrier recovery

Fine loop bandwidth

• Description: Natural bandwidth of the fine carrier recovery loop filter.
• Automation reference: CarrierLoopbandwidth
• Unit: Hz
• Type: real

Coarse loop bandwidth

• Description: Natural bandwidth of the coarse carrier recovery loop filter.
• Automation reference: CoarseCarrierLoopbandwidth
• Unit: Hz
• Type: real

Max Frequency Offset

• Description: Largest deviancy of the carrier frequency to track. The tracked frequency will be clamped to the baseband center frequency +/- this value.
• Automation reference: CarrierLimit
• Unit: Hz
• Type: real

Fine Frequency Offset

• Description: Largest deviancy of the carrier frequency to track in the fine carrier tracking loop.
• Automation reference: FineCarrierLimit
• Unit: Hz
• Type: real

Timing recovery

Loop bandwidth

• Description: Natural bandwidth of the timing recovery loop filter.
• Automation reference: TimingLoopbandwidth
• Unit: Hz
• Type: real

Max Frequency Offset

• Description: Largest deviancy of the frequency to track. The tracked frequency will be clamped to the symbol rate +/- this value.
• Automation reference: TimingMaxOffset
• Unit: Hz
• Type: real

Filtering

Filter Type

• Description: Which kind of filter to use in the matched filter
• Automation reference: PulseShaping
• Type: enumeration

Identifier	Value	Description
Rectangular	Rectangular	Rectangular filter
RaisedCosine	RC	Raised cosine
RootRaisedCosine	RRC	Root raised cosine. Sometimes written as S-RRC (square-root raised cosine)

Number of taps

• Description: Number of taps in FIR filter
• Automation reference: Taps
• Enablement: PulseShaping in [RaisedCosine, RootRaisedCosine]
• Type: integer

Roll-off

• Description: Roll-off factor (β)
• Automation reference: RollOff
• Range: [0; 1]
• Enablement: PulseShaping in [RaisedCosine, RootRaisedCosine]
• Type: real

Measurements

Freq

• Description: MISSING
• Automation reference: Freq

SNR Est

• Description: MISSING
• Automation reference: SNREst

EsN0

• Description: MISSING
• Automation reference: EsN0

EbN0

• Description: MISSING
• Automation reference: EbN0

Coarse Carrier Offset

• Description: MISSING
• Automation reference: CoarseCarrierOffset
• Type: real

Fine Carrier Offset

• Description: MISSING
• Automation reference: FineCarrierOffset
• Type: real

AGC Scaling

• Description: MISSING
• Automation reference: AGCScaling
• Type: real

Signal Presence

• Description: MISSING
• Automation reference: SignalPresence
• Type: boolean

Time Frequency Offset

• Description: MISSING
• Automation reference: TimeFrequencyOffset
• Type: real