Class: Dsp::Systems::RaisedCosineFilter

Inherits:
System
  • Object
show all
Defined in:
lib/systems/raised_cosine_filter.rb

Instance Method Summary collapse

Constructor Details

#initialize(tb:, beta:, sample_rate:, size:) ⇒ RaisedCosineFilter

Returns a new instance of RaisedCosineFilter.



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# File 'lib/systems/raised_cosine_filter.rb', line 4

def initialize(tb: ,beta: ,sample_rate: ,size: )
    @eqn = ->(t, tb, beta){ (tb / (2 * beta.to_f) or (-tb / (2 * beta.to_f))) ? Math::PI * Dsp::Functions.sinc(1.0 / (2 * beta)) / (4.0 * tb) : (1 / tb.to_f) * Dsp::Functions.sinc(t / tb.to_f) * Math.cos((Math::PI * beta * t) / tb.to_f) / (1 - ((2*beta*t) / tb.to_f) ** 2)}
    # super(eqn: @eqn, sample_rate: sample_rate, size: size)
    data = Dsp::AnalogSignal.new(eqn: @eqn, sample_rate: sample_rate, size: size).digitize
    super(data)
end