channel_est.h

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//channel_est.h
//
// Project Red 2002: High Performance OFDM Modem 
// Against Channel Imperfections
// Auther: Linus Falk

extern float H[254];
extern float H_abs_sqr[127];
extern float H_mean[254];
extern float H_mean_abs_sqr[127];
//extern float noise_var_mean[127];
extern float snr;
extern int snr_int;
extern float noise_var;

void channel_est(float *complex_frame);
void init_channel_est(void);
void calculate_channel_abs_sqr(void);
void interpolateFilter(float filter[254]);