dspf_sp_convol.h

详细的OFDM设计过程

/* ======================================================================== */
/*                                                                          */     
/*  TEXAS INSTRUMENTS, INC.                                                 */
/*                                                                          */
/*  NAME                                                         	        */
/*      DSPF_sp_convol: Convolution(Floating Point Version)                 */ 
/*                                                                          */
/* USAGE                                                                    */
/*    This routine has the following C prototype:                           */
/*                                                                          */
/*    void DSPF_sp_convol                                                   */
/*         (                                                                */
/*               float *x, //x: Pointer to input samples//                  */
/*               float *h, //h: Pointer to impulse response samples//       */
/*               float *r, //r: Pointer to output samples//                 */
/*               int   nh, //nh: Number of impulse response samples//       */
/*               int   nr  //nr: Number of output samples//                 */
/*         )                                                                */
/*                                                                          */
/*          x = pointer to real input vector of size = nr+nh-1              */
/*          a typically contains input data (x) padded with                 */
/*          consecutive nh - 1  zeros at the beginning and end.             */
/*          h = pointer to real input vector of size nh in forward order.   */
/*          h typically contains the filter coefs.                          */
/*          r = Pointer to real output vector of size nr                    */
/*          nh= Number of elements in vector b. NOTE: nh <= nr  nh is       */
/*          typically noted as m in convol formulas. nh must be a           */
/*          MULTIPLE of 2                                                   */
/*          nr= Number of elements in vector r. nr must be a MULTIPLE of 4  */
/*                                                                          */
/*  DESCRIPTION                                                             */
/*          This function calculates the full-length convolution of real    */
/*          vectors x and h using time-domain techniques. The result is     */
/*          placed in real vector r.                                        */
/*                                                                          */
/*          It is assumed that input vector x is padded with nh-1 no of     */
/*          zeros in the beginning and end.                                 */
/*                                                                          */
/*          It is assumed that the length of the input vector h, nh, is a   */
/*          multiple of 2 and the length of the output vector r, nr, is a   */
/*          multiple of 4. nh is greater than or equal to 4 and nr is       */
/*          greater than or equal to nh. The routine computes 4 output      */
/*          samples at a time.                                              */
/*                                                                          */
/*                                                                          */
/* ------------------------------------------------------------------------ */
/*            Copyright (c) 2003 Texas Instruments, Incorporated.           */
/*                           All Rights Reserved.                           */
/* ======================================================================== */

#ifndef DSPF_SP_CONVOL
#define DSPF_SP_CONVOL 1

void DSPF_sp_convol
        (																   
             float *x, /*x: Pointer to input samples*/     		                      
             float *h, /*h: Pointer to impulse response samples*/		   
             float *r, /*r: Pointer to output samples*/					   
             int   nh, /*nh: Number of impulse response samples*/     	   
             int   nr  /*nr: Number of output samples*/              	   
        );

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