FIR Filter

Group: Baseband > Filtering

Applies baseband filtering to a signal.

Parameters

Gain

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

General

Filter Type

• Description: Which kind of filter to generate
• Automation reference: FilterType
• Type: enumeration

Identifier	Value	Description
RRC	Root Raised Cosine (RRC)	Root raised cosine filter, also somtimes referred to as the square root raised cosine (S-RRC).
RC	Raised Cosine (RC)	Raised-cosine filter
Gaussian	Gaussian	Gaussian filter
Sinc	Sinc	Sinc filter (truncated and windowed with Blackman window)
SquareWave	Square wave	Square wave filter (moving average)
SineWave	Sine wave	Sine filter from 0 to pi
BiPhaseRect	Square wave (bi-phase)	Bi-phase square wave filter
Laurent	Laurent Pulse	Laurent pulse shape of c0(t)
LowPass	Low-pass filter	Filter constructed with a least-squares method
HalfBand	Half Band

Data type

• Description: Whether to process complex or real data
• Automation reference: IOType
• Type: enumeration

Identifier	Value	Description
Real	Real
Complex	Complex

Filter Implementation

• Description: Which kind of filter structure to use
• Automation reference: Implementation
• Type: enumeration

Identifier	Value	Description
FIR	FIR
FFT	FFT

Specification

Number of taps

• Description: Number of taps in FIR filter
• Automation reference: Taps
• Enablement: FilterType in [Gaussian, RRC, RC, Sinc]
• Type: integer

Sample Rate

• Description: Sample rate of processed data
• Automation reference: SampleRate
• Unit: Hz
• Type: real

Symbol Rate

• Description: Symbol rate of processed data
• Automation reference: SymbolRate
• Unit: Hz
• Type: real

Roll-off

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

BT factor

• Description: Bandwidth to symbol bandwidth ratio
• Automation reference: BT
• Enablement: FilterType in [Gaussian, Laurent]
• Type: real

Cut-off frequency

• Description: Cutoff frequency
• Automation reference: Cutoff
• Enablement: FilterType == LowPass
• Type: real

Stopband frequency

• Description: Frequency where the signal should be attenuated
• Automation reference: Stopband
• Enablement: FilterType == LowPass
• Type: real