def __init__(self, params):
"""
Initialize L2C tracking channel with L2C specific data.
Parameters
----------
params : dictionary
L2C tracking initialization parameters
"""
# Convert acquisition SNR to C/N0
cn0_0 = 10 * np.log10(params['acq'].snr)
cn0_0 += 10 * np.log10(defaults.L2C_CHANNEL_BANDWIDTH_HZ)
params['cn0_0'] = cn0_0
params['coherent_ms'] = 20
params['coherent_iter'] = 1
params['loop_filter_params'] = defaults.l2c_loop_filter_params
params['lock_detect_params'] = defaults.l2c_lock_detect_params_20ms
params['IF'] = params['samples'][gps_constants.L2C]['IF']
params['prn_code'] = L2CMCodes[params['acq'].prn]
params['code_freq_init'] = params['acq'].doppler * \
gps_constants.l2c_chip_rate / gps_constants.l2
params['chipping_rate'] = gps_constants.l2c_chip_rate
TrackingChannel.__init__(self, params)
self.cnav_msg = CNavMsg()
self.cnav_msg_decoder = CNavMsgDecoder()
