62 lines
1.4 KiB
C
62 lines
1.4 KiB
C
// lasp_ps.h
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//
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// Author: J.A. de Jong - ASCEE
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//
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// Description: Single sided power and cross-power spectra computation
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// routines.
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//////////////////////////////////////////////////////////////////////
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#pragma once
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#ifndef LASP_PS_H
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#define LASP_PS_H
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#include "lasp_window.h"
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typedef struct PowerSpectra_s PowerSpectra;
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/**
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* Allocate a PowerSpectra computer
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*
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* @param nfft fft length
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* @param nchannels Number of channels
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* @param wt Windowtype, as defined in window.h
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*
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* @return PowerSpectra handle, NULL on error
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*/
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PowerSpectra* PowerSpectra_alloc(const us nfft,
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const WindowType wt);
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/**
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* Compute power spectra.
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*
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* @param ps[in] PowerSpectra handle
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* @param[in] timedata Time data. Should have size nfft*nchannels
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*
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* @param[out] result Here, the result will be stored. Should have
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* size (nfft/2+1)*nchannels^2, such that the Cij at frequency index f
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* can be obtained as result[f,i+j*nchannels]
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*
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*/
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void PowerSpectra_compute(const PowerSpectra* ps,
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const dmat* timedata,
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cmat *result);
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/**
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* Return nfft
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*
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* @param ps[in] PowerSpectra handle
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*
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* @return nfft
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*/
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us PowerSpectra_getnfft(const PowerSpectra* ps);
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/**
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* Free PowerSpectra
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*
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* @param[in] ps PowerSpectra handle
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*/
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void PowerSpectra_free(PowerSpectra* ps);
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#endif // LASP_PS_H
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//////////////////////////////////////////////////////////////////////
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