LoRa Communication System Using LDPC Channel Coding Scheme
A LoRa communication system based on LDPC codec as channel coding scheme is proposed.After trade-off,the system uses LDPC code encoding and LLR-BP decoding instead of Hamming codec,which can skip the interleaving process without changing the definition of LoRa core modulation technology and parameters,and make the system have better bit error performance and flexibly support the transmission of long data packets.The simulation results show that under the same coding rate,when the Bit Error Rate(BER)level is 10-3,the LoRa communication system based on LDPC codec as the channel coding scheme can relax the signal-to-noise ratio performance by about 1.5 dB compared with the traditional system,which is true for common SF of LoRa system,so the system can be considered to have certain reference value.
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