From 593c5401bff73c9d328d214978cf4ba960f62e7e Mon Sep 17 00:00:00 2001
From: Federico Guerra <federico@guerra-tlc.com>
Date: Sun, 4 Aug 2024 15:59:22 +0200
Subject: [PATCH] uan: (fixes #1112) Fix Thorp attenuation formula (fix due to
 donghuiyong)

---
 RELEASE_NOTES.md                      | 1 +
 src/uan/model/uan-prop-model-thorp.cc | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/RELEASE_NOTES.md b/RELEASE_NOTES.md
index 6e7bdec4f..d9c454860 100644
--- a/RELEASE_NOTES.md
+++ b/RELEASE_NOTES.md
@@ -43,6 +43,7 @@ been tested on Linux. As of this release, the latest known version to work with
 - (wifi) Avoid firing WifiMac::DroppedMpdu trace twice in some cases
 - (wifi) Fix assignment of AIDs to non-AP STAs/MLDs to ensure they are unique
 - (wifi) Fix starting Sequence Number when ADDBA Response arrives after timeout
+- (uan) !2087 - Fix Thorp attenuation formula
 
 Release 3.42
 ------------
diff --git a/src/uan/model/uan-prop-model-thorp.cc b/src/uan/model/uan-prop-model-thorp.cc
index 167f839e0..1a2af7ce9 100644
--- a/src/uan/model/uan-prop-model-thorp.cc
+++ b/src/uan/model/uan-prop-model-thorp.cc
@@ -93,7 +93,7 @@ UanPropModelThorp::GetAttenDbKm(double freqKhz)
     }
     else
     {
-        atten = 0.002 + 0.11 * (freqKhz / (1 + freqKhz)) + 0.011 * freqKhz;
+        atten = 0.002 + 0.11 * (fsq / (1 + fsq)) + 0.011 * fsq;
     }
 
     return atten;