Commit | Line | Data |
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1eeb62fb AIL |
1 | function r = rxFilter(y, rolloff, span, sps) |
2 | %% Receiver matched (root raised cosine) filter. | |
3 | %% Inputs: | |
4 | %% - y: received waveform | |
5 | %% - rolloff: rolloff factor in root raised cosine filter. | |
6 | %% - span: filter span (number of symbols) | |
7 | %% - sps: samples per symbol | |
8 | %% Output: | |
9 | %% - r: filtered signal (energy not normalized), | |
10 | %% normalize and then sample. | |
11 | filter = comm.RaisedCosineReceiveFilter... | |
12 | ('Shape', 'Square root', ... | |
13 | 'RolloffFactor', rolloff, ... | |
14 | 'FilterSpanInSymbols', span, ... | |
15 | 'InputSamplesPerSymbol', sps, ... | |
16 | 'DecimationFactor', 1); | |
17 | ||
18 | r = filter([y; zeros(span * sps, 1)]); | |
19 | r = r(span * sps / 2 + 1 : end); % truncate filter transients | |
20 | end |