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26 lines
711 B
Matlab
26 lines
711 B
Matlab
11 years ago
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function [symbs] = samps_to_symbs(samps, slot_start_idx, symb_offset, FFT_pad_size, scale)
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% Calculate index and CP length
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if(mod(symb_offset, 7) == 0)
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CP_len = 160;
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else
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CP_len = 144;
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end
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index = slot_start_idx + (2048+144)*symb_offset;
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if(symb_offset > 0)
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index = index + 16;
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end
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% Take FFT
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tmp = fftshift(fft(samps(index+CP_len:index+CP_len+2047)));
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% Remove DC subcarrier
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tmp_symbs = [tmp(FFT_pad_size+1:1024); tmp(1026:2048-(FFT_pad_size-1))];
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if(scale == 0)
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symbs = tmp_symbs;
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else
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for(n=1:length(tmp_symbs))
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symbs(n) = cos(angle(tmp_symbs(n))) + j*sin(angle(tmp_symbs(n)));
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end
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end
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end
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