33 lines
1.0 KiB
Matlab
33 lines
1.0 KiB
Matlab
function signal_out = awgn_alpha_d_channel(signal_in, options)
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%AWGN_ALPHA_D_CHANNEL Apply a 1 + alpha*D FIR channel followed by AWGN.
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arguments
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signal_in
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options.alpha (1,1) double = 0
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options.delay_samples (1,1) double {mustBeInteger, mustBePositive} = 1
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options.snr_dB (1,1) double = 20
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options.randkey = []
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end
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signal_out = signal_in;
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taps = zeros(1, options.delay_samples + 1);
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taps(1) = 1;
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taps(end) = options.alpha;
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signal_out.signal = filter(taps, 1, signal_in.signal, [], 1);
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if isa(signal_out, 'Signal')
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desc = sprintf('1 + alpha*D channel with alpha %.4f and delay %d samples', ...
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options.alpha, options.delay_samples);
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meta = struct( ...
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'alpha', options.alpha, ...
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'delay_samples', options.delay_samples);
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signal_out = signal_out.logbookentry(desc, meta);
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end
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signal_out = awgn_channel(signal_out, ...
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"snr_dB", options.snr_dB, ...
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"randkey", options.randkey);
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end
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