dspf_sp_fir_cplx.h

详细的OFDM设计过程

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/*  TEXAS INSTRUMENTS, INC.                                                 */
/*                                                                          */
/*  NAME                                                                    */
/*   DSPF_sp_fir_cplx -- Single Precision complex Finite Impulse Response   */
/*   Filter                                                                 */
/*                                                                          */
/* USAGE                                                                    */
/*       This routine has the following C prototype:                        */
/*                                                                          */
/*       void DSPF_sp_fir_cplx(                                             */
/*                        const float * restrict x,                         */
/*                        const float * restrict h,                         */
/*                        float *       restrict r,                         */
/*                        int   nh,                                         */
/*                        int   nr                                          */
/*                       )                                                  */
/*                                                                          */
/*            x[2*(nr+nh-1)] : Pointer to complex input array.              */
/*                             The input data pointer x must point to the   */
/*                             (nh)th complex element, i.e.                 */
/*                 element 2*(nh-1).                                        */
/*            h[2*nh]:        Pointer to complex coefficient array          */
/*                        (in normal order).                                */
/*            r[2*nr]:        Pointer to complex output array.              */
/*            nh:             Number of complex coefficients in vector h.   */
/*            nr:             Number of complex output samples to           */
/*                        calculate.                                        */
/*                                                                          */
/* DESCRIPTION                                                              */
/*                                                                          */
/*       This function implements the FIR filter for complex input data.    */
/*       The filter has nr output samples and nh coefficients. Each array   */
/*       consists of an even and odd term with even terms representing the  */
/*       real part and the odd terms the imaginary part of the element.     */
/*       The coefficients are expected in normal order.                     */
/*                                                                          */
/*                                                                          */
/*                                                                          */
/*                                                                          */
/* ------------------------------------------------------------------------ */
/*            Copyright (c) 2003 Texas Instruments, Incorporated.           */
/*                           All Rights Reserved.                           */
/* ======================================================================== */
#ifndef DSPF_SP_FIR_CPLX_
#define DSPF_SP_FIR_CPLX_ 1

void DSPF_sp_fir_cplx(
                     const float *restrict x,
                     const float *restrict h,
                     float *restrict r,
                     int nh,
                     int nr
                     );

#endif
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/*  End of file: dspf_sp_fir_cplx.h                                         */
/* ------------------------------------------------------------------------ */
/*          Copyright (C) 2003 Texas Instruments, Incorporated.             */
/*                          All Rights Reserved.                            */
/* ======================================================================== */