Bounds on and Constructions of Unit Time-Phase Signal Sets

TL;DR

This paper develops improved bounds for time-phase signal sets and introduces two series of constructions, including an optimal one, enhancing the design of signals resilient to both time and phase distortions.

Contribution

It provides better bounds on time-phase signal sets derived from existing time signal set bounds and constructs two series of such sets, one of which is proven optimal.

Findings

Derived improved bounds on time-phase signal sets from known time signal set bounds.

Constructed two series of time-phase signal sets, with one being optimal.

Enhanced the theoretical understanding and practical design of signals for communication systems.

Abstract

Digital signals are complex-valued functions on $\Z_n$. Signal sets with certain properties are required in various communication systems. Traditional signal sets consider only the time distortion during transmission. Recently, signal sets against both the time and phase distortion have been studied, and are called {\em time-phase} signal sets. Several constructions of time-phase signal sets are available in the literature. There are a number of bounds on time signal sets (also called codebooks). They are automatically bounds on time-phase signal sets, but are bad bounds. The first objective of this paper is to develop better bounds on time-phase signal sets from known bounds on time signal sets. The second objective of this paper is to construct two series of time-phase signal sets, one of which is optimal.