Description:
Reference #: 1717
The University of South Carolina is offering licensing opportunities for The Optimal Radius and Subcarrier Mapping for BMOCZ.
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 is parameterized by a radius controlling the placement of the zeros in the complex plane. The choice of this radius affects both reliability and peak-to-average power ratio.
Invention Description:
In this invention, the radius parameter maximizing reliability for Huffman binary modulation on conjugate-reciprocal zeros (BMOCZ) implemented with both a maximum likelihood (ML) and direct zero-testing (DiZeT) decoder is identified. Firstly, it is demonstrated that the radius maximizing the distance between the zeros is different from that maximizing the minimum distance of the final code. Using simulations, it is then shown that the optimal decoder for BMOCZ in both additive white Gaussian noise (AWGN) and fading channels is the ML decoder when the radius is chosen to maximize codeword separation. Additionally, three sequence-to-subcarrier mappings are introduced for BMOCZ-based orthogonal frequency division multiplexing (OFDM) and highlight a proposed time-mapping approach that can accommodate large polynomial sequences at the expense of increased peak-to-average power ratio (PAPR).
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:
This invention furthers both the reliability and practicality of the already proposed BMOCZ, particularly as it concerns integration with OFDM.