US 2026/0230109 A1 · PULSE SYNCHRONIZATION

Abstract

A method for synchronizing a device to a pulse signal. Application is found in wireless communication for detecting and synchronizing data pulses that would otherwise be imperceptible. Using this method, the transceiver can be ultra low power and low cost. The method allows the receiving unit to synchronize wirelessly to the received signal, which consists of pulses spread across a code period. The position of the pulses within the code period is defined by a pseudo-random code, which is orthogonal and non-correlated to minimize interference with other channels or devices using random codes. The method does not require an external clock signal for synchronization. It may include a combined transceiver unit with a Li-Fi receiver or an ultra-wideband (UWB) receiver as the first receiver. The method involves shifting an integration window with respect to the signal using multiple delay values. For each delay value, an integration value is indicating the delay to be selected. The selected delay can be used to implement low-power, high-density, both stationary and mobile ad-hoc mesh networks that provide dynamic ranging, localization, and spatial awareness.

Claims21

Dependent claims

A method for synchronizing a receiving unit of a device to an electromagnetic signal, the signal comprising pulses spread across a length of time referred to as a code period, wherein a position of the pulses within the code period is defined by a pseudo-random code,

wherein the method comprises, by the device:
a) receiving, using the receiving unit, the signal;
b) defining an integration window having a length corresponding to the code length, and comprising integration intervals at positions within the integration window defined by the pseudo-random code, each integration interval comprising a first integration range and a non-overlapping second integration range;
c) for each of a plurality of different delay values, shifting the integration window with respect to the signal with the respective delay value and determining a corresponding integration value based on a difference between a first integral of the signal over the first integration ranges and a second integral of the signal over the second integration ranges;
d) selecting a delay value among the plurality of delay values corresponding to an extreme of the determined integration values;
and
e) synchronizing the receiving unit to the signal using said selected delay value.

4 more elements

Dependencies are inferred from the claim text.

Pulse synchronization

Life of this patent

Pulse synchronization

Life of this patent

Abstract

Claims21