/** \brief Apply RF impairments to received signal
@param r_re Double two-dimensional array of Real part of received signal
@param r_im Double two-dimensional array of Imag part of received signal
@param r_re_i1 Double two-dimensional array of Real part of received interfering signal
@param r_im_i1 Double two-dimensional array of Imag part of received interfering signal
@param I0_dB Interference-level with respect to desired signal in dB
@param nb_rx_antennas Number of receive antennas
@param length of signal
@param s_time sampling time in s
@param f_off Frequency offset in Hz
@param drift Timing drift in Hz
@param noise_figure Noise figure in dB
@param rx_gain_dB Total receiver gain in dB
@param IP3_dBm Input IP3 in dBm
@param initial_phase Initial phase for receiver
@param pn_cutoff Phase noise cutoff frequency (loop filter)
@param pn_amp_dBc Phase noise amplitude with respect to carrier
@param IQ_imb_dB IQ amplitude imbalance in dB
@param IQ_phase IQ phase imbalance in radians*/
void rf_rx(double **r_re,
	   double **r_im,
	   double **r_re_i1,
	   double **r_im_i1,
	   double I0_dB,
	   unsigned int nb_rx_antennas,
	   unsigned int length,
	   double s_time,
	   double f_off,
	   double drift,
	   double noise_figure,
	   double rx_gain_dB,
	   int IP3_dBm,
	   double *initial_phase,
	   double pn_cutoff,
	   double pn_amp_dBc,
	   double IQ_imb_dB,
	   double IQ_phase); 

void rf_rx_simple(double **r_re,
		  double **r_im,
		  unsigned int nb_rx_antennas,
		  unsigned int length,
		  double s_time,
		  double rx_gain_dB);


void adc(double **r_re,
	 double **r_im,
	 unsigned int input_offset,
	 unsigned int output_offset,
	 int **output,
	 unsigned int nb_rx_antennas,
	 unsigned int length,
	 unsigned char B);

void dac(double **s_re,
	 double **s_im,
	 int **input,
	 unsigned int input_offset,
	 unsigned int nb_tx_antennas,
	 unsigned int length,
	 double amp_dBm,
	 unsigned char B,
	 unsigned int meas_length,
	 unsigned int meas_offset);

double dac_fixed_gain(double **s_re,
		      double **s_im,
		      int **input,
		      unsigned int input_offset,
		      unsigned int nb_tx_antennas,
		      unsigned int length,
		      unsigned int input_offset_meas,
		      unsigned int length_meas,
		      unsigned char B,
		      double gain);