Description:
Reference #: 1767
The University of South Carolina is offering licensing opportunities for Asymmetric BMOCZ for CFO-resilient Non-coherent Communication.
Background:
Non-coherent communication is a promising solution to reduce the overhead in modern wireless systems, particularly for low-latency and short-packet applications. Binary modulation on conjugate-reciprocal zeros (BMOCZ) is an emerging non-coherent digital modulation that works by transmitting the coefficients of a polynomial whose zeros encode information bits. In the absence of noise, the zero structure of the transmitted polynomial is preserved at the receiver, enabling the decoder to estimate the transmitted bits without knowledge of the instantaneous channel state information. The state-of-the-art for BMOCZ is Huffman BMOCZ, which has heightened zero stability and favorable auto-correlation properties. However, to maintain performance under a frequency offset, Huffman BMOCZ requires a special class of block codes, called cyclically permutable codes (CPCs). Although equipped with error-correction capabilities, CPCs limit the flexibility of Huffman BMOCZ and preclude soft-decision decoding.
Invention Description:
This invention introduces an asymmetric variant of the zero constellation for Huffman binary modulation on conjugate-reciprocal zeros (BMOCZ) that maintains performance under a carrier frequency offset (CFO) without requiring a cyclically permutable code (CPC). The invention exploits the common aperiodic auto-correlation function of BMOCZ sequences to enable CFO estimation using the discrete Fourier transform. The proposed method is computationally straightforward and can be implemented iteratively to improve performance at low signal-to-noise ratio. Through simulation, it is shown that the proposed asymmetric design outperforms Huffman BMOCZ with a CPC in bit error rate.
Potential Applications:
The invention has potential applications in Internet of Things (IoT) devices and sensors, integrated sensing and communication, vehicle-to-vehicle communication, robotics, and more.
Advantages and Benefits:
Unlike existing solutions for Huffman BMOCZ, the proposed method does not require a cyclically permutable code for robustness against a CFO. The invention therefore furthers the practical applicability of BMOCZ by enabling its implementation with a larger family of channel codes.