Jialuo Du, Jingkai Lin, Zhichao Cao
MobiCom 2026ACM International Conference on Mobile Computing and Networking
Weak LoRa packets are lost at detection, before decoding even starts. Carrier frequency offset rotates the phase of every preamble chirp, so existing detectors add only magnitudes and waste signal power. DeRa models that phase evolution, compensates the CFO-induced timing, frequency and leakage distortions (up to 40 kHz CFO), and accumulates the preamble coherently. On COTS devices across SF 7–12 it lowers the detection threshold by 4.3–4.8 dB and the decoding threshold by 3.3–3.9 dB.
Jialuo Du, Yunhao Liu, Yidong Ren, Li Liu, Zhichao Cao
MobiCom 2024ACM International Conference on Mobile Computing and Networking
Real LoRa symbols contain a frequency jump that standard dechirp-and-FFT demodulation ignores, adding noise and a random phase jump. LoRaTrimmer trims the FFT window at the jump and handles the phase jump probabilistically, gaining 1.70–2.49 dB SNR over the state of the art (up to 1.67× coverage area). Splitting the DFT matrix into two anti-diagonal triangles computes every bin's trimmed FFT at once, in O(n3/2) time.
Jialuo Du, Yidong Ren, Zhui Zhu, Chenning Li, Zhichao Cao, Qiang Ma, Yunhao Liu
MobiHoc 2023ACM International Symposium on Theory, Algorithmic Foundations, and Protocol Design for Mobile Networks and Mobile Computing
A neural LoRa decoder that fuses the same weak packet as heard by multiple gateways. Interleaved denoising and merging layers exploit spatial diversity to decode signals far below the noise floor.
Kunzhe Song, Jialuo Du, Jingkai Lin, Huacheng Zeng
NeurIPS 2026Accepted · PosterConference on Neural Information Processing Systems
RFWalk learns robot motion from RF measurements alone, without pose labels or auxiliary sensors. Temporal cycle consistency learns correspondences, while Doppler measurements constrain them to physically plausible motion. Robust registration suppresses uncertain matches and moving objects; the method reduces absolute trajectory error by 58% in dynamic scenes with moving pedestrians.
Jingkai Lin, Yidong Ren, Jialuo Du, Yimeng Liu, Yawen Wang, Younsuk Dong, Tianxing Li, Zhichao Cao
ICNP 2026IEEE International Conference on Network Protocols
LoRa antennas buried in farmland drift out of polarization alignment as soil moisture changes. Kairos predicts when recalibrating will actually save energy and then finds a good polarization state with few probes, cutting energy use by up to 3.71× in a real agricultural field.
Jialuo Du
MobiSys 2026 Rising StarsACM MobiSys 2026 Rising Stars Forum
A research agenda for taking LoRa from today's deployments to billions of devices by removing its physical-layer bottlenecks: decoding weak signals at a single gateway, letting multiple gateways decode cooperatively, and overcoming collisions and environmental attenuation.
Yimeng Liu, Fangwei Zhang, Maolin Gan, Jialuo Du, Jingkai Lin, Yawen Wang, Fei Sun, Honglei Chen, Linda Hill, Ruofeng Liu, Tianxing Li, Zhichao Cao
arXiv 2026arXiv:2603.00691
AURA is a vision for assessing older adults' driving safety continuously from everyday trips rather than occasional clinic visits. It combines in-vehicle sensing, multi-scale behavior modeling and context-aware analysis on a privacy-preserving edge architecture.
Khang Nguyen, Yidong Ren, Jialuo Du, Jingkai Lin, Maolin Gan, Shigang Chen, Mi Zhang, Chunyi Peng, Zhichao Cao
MobiCom 2025ACM International Conference on Mobile Computing and Networking
A lightweight denoiser for neural LoRa decoding that combines CNNs, a compact Transformer and a hierarchical U-Net. It gains up to 3.03 dB over prior neural decoders while cutting model storage by up to 7.4×.
Yidong Ren, Wei Sun, Jialuo Du, Huaili Zeng, Younsuk Dong, Mi Zhang, Shigang Chen, Yunhao Liu, Tianxing Li, Zhichao Cao
MobiCom 2024ACM International Conference on Mobile Computing and Networking
A low-cost, low-power programmable antenna that realigns signal polarization on single-RF-chain COTS LoRa radios, keeping links from sensors buried in soil reliable as soil conditions change.
Yidong Ren, Puyu Cai, Jinyan Jiang, Jialuo Du, Zhichao Cao
INFOCOM 2023IEEE International Conference on Computer Communications
Backscatter tags convert the linear chirps of ordinary COTS LoRa nodes into different non-linear chirps with a lightweight, low-power frequency-shift design, so many tags can transmit concurrently in the same channel.
