Customized Data De-Randomization - Safran CORTEX Series User Manual

3.4.4

Customized Data De-randomization

The Cortex HDR provides a fully programmable de-randomization function.
Are programmable:
- the polynomial of the generator of the pseudo-random sequence The supported maximum
degree of the polynomial is 16 (refer to the examples below)
the initial value of the generator (fully programmable between 0x0000 and 0xFFFF).
-
Example 1: Polynomial: X
Example 2: Polynomial: X
For modulation schemes with separate I and Q, each de-randomization function is configurable
independently of each other.
The customized de-randomization can performed before or after the associated decoding (Reed
Solomon or LDPC). That is programmable (refer to CADU window).
© Safran Data Systems – IMP000074 e14r1
HIGH DATA RATE RECEIVER
HDR-4G+ USER'S MANUAL
15
+ X +1 (polynomial set-up value: 0x8003)
8 7 5 3
+ X + X + X +1 (polynomial set-up value: 0x1A9)
Ref.
Is.Rev
Date:
Safran Data Systems
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DTU 100782
3.5
June 1, 2021
.
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