Changes between Version 17 and Version 18 of Other/Summer/2015/aSDR3
- Timestamp:
- Jul 22, 2015, 6:30:22 PM (9 years ago)
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Other/Summer/2015/aSDR3
v17 v18 19 19 Third, we tested it to work together with Wi-Fi signal, and collect the result. 20 20 21 === Experiments === 22 ==== Experiment 1: ==== 21 === Theory === 22 ===== OpenAir0 ===== 23 24 ===== OpenAir1 ===== 25 26 ===== OpenAir2 ===== 27 28 ===== OpenAir3 ===== 29 30 31 32 === Analyzing Tools === 33 ===== GNU Radio ===== 34 35 ===== Spectrum Analyzer ===== 23 36 24 37 ===== Signal-to-Noise Ratio (SNR) ===== 25 38 There are 2 methods to approximate the SNR. 26 39 27 Method 1: Estimate the noise power by measure the received signal power when transmitter is turned off.40 Method 1: Estimate the noise power by measure the received signal power when transmitter is turned off. 28 41 29 42 Method 2: Estimate the noise power by calculate the received signal variance. 30 43 31 44 noise = variance = mean ( signal - mean ( signal ) ) 32 45 46 noise [dB] = 10 log (noise power) 47 48 signal [dB] = 10 log (signal power) 49 50 SNR = signal power / noise power 51 52 SNR [dB] = signal [dB] - noise [dB] 53 54 === Experiments === 55 ==== Experiment 1: ==== 33 56 ==== Experiment 2: ==== 34 57 … … 38 61 39 62 ==== Experiment 5: ==== 40 41 42 63 43 64 === Members ===
