From fc5bc4210878560934e267539e597faa7844c939 Mon Sep 17 00:00:00 2001 From: Xianjun Jiao Date: Mon, 13 May 2024 21:52:22 +0200 Subject: [PATCH] fix the figure link in open_btle_baseband_chip.md --- open_btle_baseband_chip/open_btle_baseband_chip.md | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/open_btle_baseband_chip/open_btle_baseband_chip.md b/open_btle_baseband_chip/open_btle_baseband_chip.md index ae1a77d..c36dd33 100644 --- a/open_btle_baseband_chip/open_btle_baseband_chip.md +++ b/open_btle_baseband_chip/open_btle_baseband_chip.md @@ -303,7 +303,7 @@ Now let's run a worst 50PPM case by giving 50 as argument to the test_btle_ber.p ``` python test_btle_ber.py 50 ``` -![open_btle_baseband_chip_files/open_btle_baseband_chip_21_1.png](open_btle_baseband_chip_files/open_btle_baseband_chip_21_1.png) +![open_btle_baseband_chip_21_1.png](open_btle_baseband_chip_21_1.png) During the simulation, some realtime info is shown: ppm value, frequency offset (50PPM --> 122.5KHz under 2.45GHz center frequency of 2.4GHz ISM band), BER and related the number of error bits, etc. @@ -314,7 +314,7 @@ Let's simulate another better case: -30PPM. ``` python test_btle_ber.py -30 ``` -![open_btle_baseband_chip_files/open_btle_baseband_chip_23_1.png](open_btle_baseband_chip_files/open_btle_baseband_chip_23_1.png) +![open_btle_baseband_chip_23_1.png](open_btle_baseband_chip_23_1.png) From the above figure, BER 0.1% is achieved around SNR 13.5dB. In modern hardware, 30PPM is an easy task for a crystal, and it already can bring big gain on the sensitivity.