Safran CORTEX Series - DNRZ, OQPSK Decoding; Most Commonly Used DNRZ Code in OQPSK Mode

HIGH DATA RATE RECEIVER
HDR-4G+ USER’S MANUAL
Ref. DTU 100782
Is.Rev 3.5
Date: June 1, 2021
© Safran Data Systems – IMP000074 e14r1
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Page 93
DNRZ, OQPSK Decoding 3.3.4.2
Several DNRZ algorithms are possible for ambiguity resolution in OQPSK mode. The DNRZ code
(algorithm) value can be programmed via a the Cortex HDR ICD parameter, using examples in next
two sections (Most commonly used and Other possibilities).
Most Commonly Used DNRZ Code in OQPSK Mode 3.3.4.2.1
I
dl
[n-1]
Q
dl
[n-1]
I
dl
[n]
Q
dl
[n]
in[n]I
ˆ
in[n]Q
ˆ
0
0
0
0
0
1
0
0
0
1
0
0
0
0
1
0
1
0
0
0
1
1
1
1
0
1
0
0
1
1
0
1
0
1
1
0
0
1
1
0
0
0
0
1
1
1
0
1
1
0
0
0
0
1
1
0
0
1
0
0
1
0
1
0
1
0
1
0
1
1
1
1
1
1
0
0
1
1
1
1
0
1
1
0
1
1
1
0
0
0
1
1
1
1
0
1