5G New Radio Physical Random Access Preamble Design

To cope with the stringent requirements imposed on the random access (RA) procedure by the use cases envisioned for 5G NR, we propose an RA preamble design based on cyclically delay-Doppler shifted m-sequences. In contrast to the legacy 4G LTE RA preambles based on Zadoff-Chu (ZC) sequences, the proposed design ...

May AI Go Wrong? Case Studies.

For the successful implementation of AI models it is necessary to understand not only benefits but also potential limitations and biases of machine learning. In the talk, I am going to share with the audience several interesting examples of AI models, both thriving and with mistakes, continued with root cause ...

Resource Allocation for Uplink Grant-Free Ultra-Reliable and Low Latency Communications

Ultra-Reliable and Low Latency Communications (URLLC) is an important emerging area for the fifth generation (5G) cellular network. The requirements for URLLC are as stringent as 1e10-5 reliability for a 32-byte packet with user plane latency of 1 ms. To achieve these requirements, grant-free transmission with repetitions of data packet ...

Compressive Sensing vs. JPEG: An End-to-End Comparison

We present an end-to-end image compression system based on compressive sensing by adding measurement quantization and entropy coding to the conventional scheme of compressive sampling and reconstruction. The compression performance, in terms of data rate versus image quality, is shown to be on par with JPEG and significantly better at ...