mealy.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 67 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 encoder
 | Author:      C. Britton Rorabaugh
 | Date:        January 12, 1999
 |
 | History:
 |              January 12, 1999 Tommi Makelainen
 |                      Modified Rorabaugh's example code
 |			(book Error coding cookbook, McGraw-Hill, 1996)
 |                      to rate 1/3 code with constraint length
 |                      K=9 (i.e. length of memory shift register).
 |
 */

#ifndef MEALY_H
#define MEALY_H

//  private:
struct MealyEncoder_type {
	int Output_Symbol[256][2]; /* [no. of states][no. of input states] */
	int Next_State[256][2];  /* [no. of states][no. of input states] */
	int Max_Input;
	int Max_State;
};
typedef struct MealyEncoder_type MealyEncoder;

// public:
	
void MealyEncoder_R1o3_Init(
                        MealyEncoder* this,
                        int num_stages,
                        int gen_poly_1, 
                        int gen_poly_2,
                        int gen_poly_3);

void MealyEncoder_R1o2_Init(
                        MealyEncoder* this,
			int num_stages,
			int gen_poly_1, 
			int gen_poly_2);

int MealyEncoder_GetNextState(	MealyEncoder* this,
				int current_state,
				int input);
int MealyEncoder_GetOutput(	MealyEncoder* this,
				int current_state,
				int input);
								
int MealyEncoder_GetTransitionTrigger(	MealyEncoder* this,
					int previous_state,
					int current_state);
#endif