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rpp0 / gr-lora

GNU Radio blocks for receiving LoRa modulated radio messages using SDR
GNU General Public License v3.0
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Decoding problem at SF11 and SF12 #118

Open a416485164 opened 4 years ago

a416485164 commented 4 years ago

I have to say, your work is fantastic. After testing, the results show that the decoding success rate is very high at SF7-SF10 and BW125-BW500. However, the results of SF11-12 and BW125-500 were not satisfactory. Did I set some parameters incorrectly? Receiver Hardware : USRP - B200 Transmitter Hardware:RN2483

What is the LoRa Receiver parameter setting for SF11-12 during the test? Do you have any suggestions? Thank you again for sharing, and I hope you can take the time to answer my questions. Thank you.

rpp0 commented 4 years ago

Thanks for the kind words! Some devices handle SF11-12 differently than others. For example, the RN2483 enables "reduced rate mode" for these SFs whereas the RFM96 doesn't. Therefore, assuming you are receiving in implicit header mode, you could try enabling reduced rate mode.

a416485164 commented 3 years ago

Thank you very much for your help！ I tried the suggestions you said, but the decoding success rate did not increase significantly. When the transmitter sends the character string “1234” (SF=12, BW=125K), the receiver’s decoding result is 04 9d 40 81 33 33 44 42 fc . The decoding result is the same every time, I think it is because of which setting is wrong, or the decoding process is wrong.
samp_rate = 1M decimation = 2 Reduced rate = True Receiver Hardware : USRP - B200 Transmitter Hardware:RN2483

Transmitter changed to sx1276 When the transmitter sends the character string “1234” (SF=12, BW=125K), the receiver’s decoding result is 04 9d 40 b1 03 03 34 89 88

samp_rate = 1M decimation = 2 Reduced rate = False Receiver Hardware : USRP - B200 Transmitter Hardware:SX1276

Can you give me some suggestions or ideas? Thank you！