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config.txt
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config.txt
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# Transceiver configuration file
# Phy layer configuration
phy:
{
samplerate = 256000; # Baseband samplerate
nfft = 64; # Size of the FFT
cp_len = 4; # Cyclic prefix length in samples
dl_lo = 439700000; # Downlink carrier frequency
ul_lo = 434900000; # Uplink carrier frequency
# Subcarrier allocation. 0 = guard carrier, 1= pilot carrier, 2= data carrier
# Length of this array must equal the specified fft size!
# If the length is 0, this parameter is ignored and the default config (32 data, 8 pilots) used
# First half of the array represent the upper half of the spectrum. Starting with DC carrier at position 0
# Second half of the array represents the lower half of the specrum. Starting with outer frequencies
# subcarrier_alloc = [];
# The default alloc for 64 subcarriers:
subcarrier_alloc = [ 2, 2, 1, 2, 2, 2, 2, 1, 2, 2, 2, 2, 1, 2, 2, 2,
2, 1, 2, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 1, 2,
2, 2, 2, 1, 2, 2, 2, 2, 1, 2, 2, 2, 2, 1, 2, 2];
# OFDM symbol definition in time domain. 0 = symbol without pilots, 1 = symbol with pilots
# Length of this array must equal the slot length: 14;
pilot_symbols = [];
# UE regularly re-syncs to the sync sequence to estimate timing offset
# during this also the carrier frequency offset is estimated.
# estimation can estimate larger offsets than the cfo estimation with
# pilots (done during slot receive) but is inaccurate
# We filter the new estimate with the old (pilot based) cfo estimation
# Set this filter to [0 1] to tune estimation (1= solely based on new cfo)
coarse_cfo_filt_param = 0.8;
# UE constantly adapts the rxgain based on the rssi. The rssi is calculated based on the
# sync signal, every 8 subframes. The new rssi value is smoothed with an exponential filter
# the filter coefficient alpha can be tuned here
agc_rssi_filt_param = 0.25;
# Threshold for the RSSI change [dB] which is required to change
# the transceiver gain
agc_change_threshold = 3;
# the desired RSSI of the RX path. Used to tune our AGC
# Theoretical limits for RSSI are [-66 0]. For OFDM-QAM waveform this should be set to ~ -15
agc_desired_rssi = -15;
}
# Platform configuration
platform:
{
tx_bandwdith = 1701126; # Passband of the analog TX filter.
rx_bandwidth = 1703632; # Passband of the analog RX filter.
ptt_delay_comp_us = 200; # Adjust the timing of the PTT signal in usec
}
# Log configuration
log:
{
# Define the global log level: 0=TRACE, 1=DEBUG, 2=INFO, 3=WARN, 4=ERROR, 5=NONE
log_level = 2;
}