Changes between Version 48 and Version 49 of Other/Summer/2015/aSDR3

Timestamp:

Jul 31, 2015, 2:51:15 AM (9 years ago)

Author:

catle3006

Comment:

—

Other/Summer/2015/aSDR3

@@ -113 +113 @@
 
 ===== GNU Radio  =====
-GNU Radio is an important tool to obtain the Waterfall Plot. 
+GNU Radio is an important software-based tool, being used to obtain the FFT Plot, the Constellation Plot, and the Waterfall Plot. 
 [http://www.orbit-lab.org/attachment/wiki/Other/Summer/2015/aSDR3/Necessary_Commands_Links_GNU.docx.pdf How to use GNU Radio]
 ===== Signal-to-Noise Ratio (SNR)  =====
 There are 2 methods to approximate the SNR:
 * `Method 1`  Estimate the noise power by measuring the received signal power when transmitter is turned off.
+
 * `Method 2` Estimate the noise power by calculating the received signal variance.
-
-The relationship between signal, noise, SNR:
-* noise = variance = mean ( signal – mean ( signal ) )
-* noise [dB] = 10 log (noise power)
-* signal [dB] = 10 log (signal power)
-* SNR = signal power / noise power
-* SNR [dB] = signal [dB] – noise [dB]
+[[Image(http://www.orbit-lab.org/raw-attachment/wiki/Other/Summer/2015/aSDR3/SNR.png, width=120, center)]]
 
 MATLAB code to measure SNR:
 
-=== Experiments ===
-==== Experiment 1: Transmit and Receive LTE Signal====
+=== Experiments 1: Transmit and Receive LTE Signal ===
 The experiment is simulated in Sandbox 1 with USRP Hardware Driver (UHD) using OAI software.
 
@@ -157 +151 @@
 }}}
 
+__'''Note'''__:
 * '''PSS''' ''Primary Synchronization Signal'' 
 * '''SSS''' ''Secondary Synchronization Signal''
 * '''CFI''' 
-
-'''CSRS'''
-==== Experiment 2: Waterfall Plot====
+* '''CSRS'''
+
+=== Experiment 2: The Waterfall Plot ===
 {{{#!html
 <table align=center cellpadding=10 width=50%>
@@ -198 +193 @@
 }}}
 
-==== Experiment 3: Varying Bandwidths====
-
-==== Experiment 4: TDD with Varying Bandwidths====
+=== Experiment 3: Varying Bandwidths ===
+
+=== Experiment 4: TDD with Varying Bandwidths ===