27 lines
785 B
Mathematica
27 lines
785 B
Mathematica
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function out = helperFrequencyOffset(in, fs, foffset)
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%helperFrequencyOffset Apply a frequency offset to the input signal
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%
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% OUT = helperFrequencyOffset(IN, FS, FOFFSET) applies the specified
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% frequency offset to the input signal.
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%
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% OUT is the frequency-offset output of the same size as IN.
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% IN is the complex 2D array input.
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% FS is the sampling rate in Hz (e.g. 80e6).
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% FOFFSET is the frequency offset to apply to the input in Hz.
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%
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% See also comm.PhaseFrequencyOffset.
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% Copyright 2015-2019 The MathWorks, Inc.
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%#codegen
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% Initialize output
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out = complex(zeros(size(in)));
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% Create vector of time samples
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t = ((0:size(in,1)-1)/fs).';
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% For each antenna, apply the frequency offset
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for i = 1:size(in,2)
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out(:,i) = in(:,i).*exp(1i*2*pi*foffset*t);
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end
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