WSJT-X/libm65/qra64/qra64example.txt
2018-10-19 15:55:29 -04:00

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$ qra64_nico -h
QRA64 Mode Tests
2016, Nico Palermo - IV3NWV
---------------------------
Syntax: qra64 [-s<snrdb>] [-c<channel>] [-a<ap-type>] [-t<testtype>] [-h]
Options:
-s<snrdb> : set simulation SNR in 2500 Hz BW (default:-27.5 dB)
-c<channel> : set channel type 0=AWGN (default) 1=Rayleigh
-a<ap-type> : set decode type 0=NOAP 1=AUTOAP (default) 2=USERAP
-t<testtype>: 0=simulate seq of msgs between IV3NWV and K1JT (default)
1=simulate K1JT receiving K1JT IV3NWV JN66
2=simulate fast-fading routines (option -c ignored)
Options used only for fast-fading simulations:
-b : 90% fading bandwidth in Hz [1..230 Hz] (default = 2.5 Hz)
-m : fading model. 0=Gauss, 1=Lorentz (default = Lorentz)
-q : qra64 submode. 0=QRA64A,... 4=QRA64E (default = QRA64A)
-h: this help
#############################################################################
Usage example:
qra64 -c2 -t2 -a2 -b50 -m1 -q2 -s-26.0 -n50000
Simulate a fast-fading channel (-c2)
Evaluate decoder performance (-t2) with
USER_AP (-a2)
B90 = 50 Hz (-b50)
Lorentz model (-m1)
submode QRA64C (-q2)
Input SNR = -26.0 dB (-s-26.0)
Simulate 50000 transmissions (-n50000)
(type qra64 -h for command syntax)
Command Output:
Input SNR = -26.0dB ap-mode=USER AP
Simulating the fast-fading channel
B90=50.00 Hz - Fading Model=Lorentz - Submode=QRA64C
Decoder metric = Matched to fast-fading signal
Encoding msg [K1JT IV3NWV JN66]
50000 transmissions will be simulated
K1JT decoder enabled for [CQ ? ?/blank]
K1JT decoder enabled for [K1JT ? ?/blank]
K1JT decoder enabled for [? IV3NWV ?/blank]
K1JT decoder enabled for [K1JT IV3NWV ?]
K1JT decoder enabled for [K1JT IV3NWV JN66]
K1JT decoder enabled for [CQ IV3NWV ?/b/JN66]
Now decoding with K1JT's decoder...
5.5 %
Undetected error with rc=6
13.1 %
Undetected error with rc=7
70.8 %
Undetected error with rc=1
75.8 %
Undetected error with rc=9
88.9 %
Undetected error with rc=6
100.0 %
Msgs transmitted:50000
Msg decoded:
rc= 0 0 with [? ? ?] AP0
rc= 1 0 with [CQ ? ?] AP27
rc= 2 0 with [CQ ? ] AP42
rc= 3 145 with [CALL ? ?] AP29
rc= 4 0 with [CALL ? ] AP44
rc= 5 12085 with [CALL CALL ?] AP57
rc= 6 0 with [? CALL ?] AP29
rc= 7 0 with [? CALL ] AP44
rc= 8 24307 with [CALL CALL G] AP72
rc= 9 0 with [CQ CALL ?] AP55
rc=10 0 with [CQ CALL ] AP70
rc=11 0 with [CQ CALL G] AP70
Total: 36537/50000 (5 undetected errors)
Estimated SNR (average in dB) = -26.26 dB