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Paper detail

EC-GSM-IoT Network Synchronization with Support for Large Frequency Offsets

EDGE-based EC-GSM-IoT is a promising candidate for the billion-device cellular IoT (cIoT), providing similar coverage and battery life as NB-IoT. The goal of 20 dB coverage extension compared to EDGE poses significant challenges for the initial network synchronization, which has to be performed well below the thermal noise floor, down to an SNR of -8.5 dB. We present a low-complexity synchronization algorithm supporting up to 50 kHz initial frequency offset, thus enabling the use of a low-cost +/-25 ppm oscillator. The proposed algorithm does not only fulfill the 3GPP requirements, but surpasses them by 3 dB, enabling communication with an SNR of -11.5 dB or a maximum coupling loss of up to 170.5 dB.

preprint2022arXivOpen access
Stefan LippunerBenjamin WeberMauro SalomonMatthias KorbQiuting Huang
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Stefan LippunerBenjamin WeberMauro SalomonMatthias KorbQiuting Huang

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