convdec.h

来自「WCDMA的仿真程序,分别用C和MATLAB两种语言仿真」· C头文件 代码 · 共 72 行

/*
 |
 | Copyright disclaimer:
 |   This software was developed at the National Institute of Standards
 |   and Technology by employees of the Federal Government in the course
 |   of their official duties. Pursuant to title 17 Section 105 of the
 |   United States Code this software is not subject to copyright
 |   protection and is in the public domain.
 |
 |   We would appreciate acknowledgement if the software is used.
 |
*/

/*
 | Project:     WCDMA simulation environment
 | Module:      Convolutional decoder
 | Author:      C. Britton Rorabaugh
 | Date:        January 20, 1999
 |
 | History:
 |              January 20, 1999 Tommi Makelainen
 |                      Modified Rorabaugh's example code
 |                      to rate 1/3 code with constraint length
 |                      K=9 (i.e. length of memory shift register).
 |
 */

#ifndef CONV_DEC_R1o3_K9_H
#define CONV_DEC_R1o3_K9_H

struct ViterbiDecoder_type{
	int Info_Length;
	int Tail_Length;
	int Frame_Length;
	int Decoding_depth;
	int Numb_Encdr_States;
	int Numb_Inp_Symbs;
	MealyEncoder* Tx_Encoder;
	MetricTable* Decoding_Metric;
	};
typedef struct ViterbiDecoder_type ViterbiDecoder;	 

	
	void wcdma_dec_R1o3_k9_init(	ViterbiDecoder* this,
					int info_length, 
					int decoding_depth, 
					int tail_length, 
					MealyEncoder* encoder,
					MetricTable* decoding_metric);

#define wcdma_dec_R1o2_k9_init wcdma_dec_R1o3_k9_init

        void wcdma_dec_R1o2_k9_conv(
                  ViterbiDecoder* this,   /* decoder state information */
                  int rx_symbols[],       /* vector of received symbols */
                  double soft_bits[],      /* vector of soft symbols */
                  int rx_size,            /* length of received symbols */
                  int tail[],             /* tail bits */
                  int tail_size,          /* length of tail */
                  int decoded_bits[]);    /* vector of decoded bits */

        void wcdma_dec_R1o3_k9_conv(
                  ViterbiDecoder* this,   /* decoder state information */
                  int rx_symbols[],       /* vector of received symbols */
                  double soft_bits[],      /* vector of soft symbols */
                  int rx_size,            /* length of received symbols */
                  int tail[],             /* tail bits */
                  int tail_size,          /* length of tail */
                  int decoded_bits[]);    /* vector of decoded bits */

#endif /* CONV_DEC_R1o3_K9_H */