From 33612e37d9286938383674ac6d4ff8b3d729b798 Mon Sep 17 00:00:00 2001
From: Eric Kooistra <kooistra@astron.nl>
Date: Tue, 25 Jul 2023 15:42:26 +0200
Subject: [PATCH] Add block diagram.
---
.../base/common/python/try_round_weight.py | 21 ++++++++++++++++++-
1 file changed, 20 insertions(+), 1 deletion(-)
diff --git a/libraries/base/common/python/try_round_weight.py b/libraries/base/common/python/try_round_weight.py
index 08c79bfb2b..fddf03dfaf 100755
--- a/libraries/base/common/python/try_round_weight.py
+++ b/libraries/base/common/python/try_round_weight.py
@@ -65,7 +65,26 @@ import matplotlib.pyplot as plt
# Parse arguments to derive user parameters
_parser = argparse.ArgumentParser(
description="".join(textwrap.dedent("""\
- Model effect of applying a weight after or before rounding:
+ Model effect of applying a weight on input noise after or before rounding,
+ for range of input noise sigma and range of weights:
+
+ sigma
+ | 2**resolution 1/2**resolution
+ | | |
+ v v v
+ ----- ----- --------- ----- noise_q ----- --------- -------
+ noise -->| X |-->| X |-->| round |-->| X |----------->| X |-->| round |-->| std |--> sigma_qq
+ ----- | ----- --------- ----- ----- --------- -------
+ | ^
+ | |
+ | weight ---->|
+ | |
+ | noise_s ----- --------- -------
+ |------------------------------------->| X |-->| round |-->| std |--> sigma_sq
+ ----- --------- -------
+
+ sigmas_ratio_qq_sq = sigma_qq / sigma_sq --> shows jumps and variation around 1 when resolution is low
+ sigmas_ratio_sq_input = sigma_sq / sigma --> shows that rounding causes change in sigma
. weights in range(w_lo, w_hi, w_step)
. sigma of noise in range(s_lo, s_hi, s_step)
--
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