Presentation Information
[B-5B-20]Verification of a Long-Range Wireless Communication System Using Jupiter-SDR
◎Tomoka Hamada1, Yuki Imamura1, Yuhei Nagao1, Masayuki Kurosaki1 (1. Kyushu Institude of Technology)
Keywords:
Diversity,Jupiter SDR
This study experimentally evaluates a long-range wireless communication system designed for reliable operation under low signal-to-noise ratio (SNR) and severe interference conditions using the ADI Jupiter SDR platform. The proposed system employs spatial, frequency, and time diversity. It uses two receive antennas, duplicates the same information over multiple subcarriers, and transmits the same information over multiple frames. Interference-aware Maximum Ratio Combining (IMRC) is used to combine the diversity branches.
Signals generated in MATLAB were transmitted through the Jupiter SDR, attenuated, received by two antennas, and demodulated in MATLAB to evaluate Error Vector Magnitude (EVM). Compared with the conventional configuration (Nfd = 1, Ntd = 1), the proposed method (Nfd = 2, Ntd = 3) reduced the required SNR by approximately 8 dB to achieve the target EVM of −15 dB. This improvement corresponds to approximately a 2.5-fold increase in communication range under free-space propagation conditions. The results demonstrate that the proposed method effectively improves communication quality and reliability in a practical hardware environment.
Signals generated in MATLAB were transmitted through the Jupiter SDR, attenuated, received by two antennas, and demodulated in MATLAB to evaluate Error Vector Magnitude (EVM). Compared with the conventional configuration (Nfd = 1, Ntd = 1), the proposed method (Nfd = 2, Ntd = 3) reduced the required SNR by approximately 8 dB to achieve the target EVM of −15 dB. This improvement corresponds to approximately a 2.5-fold increase in communication range under free-space propagation conditions. The results demonstrate that the proposed method effectively improves communication quality and reliability in a practical hardware environment.