From 57e88af9bc90b0e358a568d16d12a98d4e567088 Mon Sep 17 00:00:00 2001 From: Bastian Bloessl Date: Tue, 14 Apr 2015 17:52:21 +0200 Subject: [PATCH] simplify fer calculation --- lib/ofdm_parse_mac.cc | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/lib/ofdm_parse_mac.cc b/lib/ofdm_parse_mac.cc index deaac5c..cca87b8 100644 --- a/lib/ofdm_parse_mac.cc +++ b/lib/ofdm_parse_mac.cc @@ -258,12 +258,12 @@ void parse_data(char *buf, int length) { dout << "mac 3: "; print_mac_address(h->addr3, true); - int lost_frames = seq_no - d_last_seq_no - 1; - dout << "d_last_seq_no: " << d_last_seq_no << std::endl; - dout << "lost frames: " << lost_frames << std::endl; + float lost_frames = seq_no - d_last_seq_no - 1; + if(lost_frames < 0) + lost_frames += 1 << 12; // calculate frame error rate - float fer = 1 - (1 / (static_cast(lost_frames) + 1)); + float fer = lost_frames / (lost_frames + 1); dout << "instantaneous fer: " << fer << std::endl; // keep track of values