A Pulse Amplitude Modulated (PAM) optical device utilizing multiple wavelengths, features a communications interface having enhanced diagnostics capability. New registers are created to house additional diagnostic information, such as error rates. The diagnostic information may be stored in raw form, or as processed on-chip utilizing local resources.

Described are, among other things, a method and a receiver for receiving a management data signal in an optical transmission system where a traffic data signal is transmitted as a NRZ modulated signal. The traffic data signal has a management data signal superimposed thereon as a pulse width modulation of the symbols of the NRZ modulated signal. The NRZ modulated signal is received with the data signal superimposed thereon and the traffic data signal is recovered. The recovered traffic data signal in anti-phase is added to the received signal. The management data signal is detected from the added signals.

Described are, among other things, a method and a receiver for receiving a management data signal in an optical transmission system where a traffic data signal is transmitted as a NRZ modulated signal. The traffic data signal has a management data signal superimposed thereon as a pulse width modulation of the symbols of the NRZ modulated signal. The NRZ modulated signal is received with the data signal superimposed thereon and the traffic data signal is recovered. The recovered traffic data signal in anti-phase is added to the received signal. The management data signal is detected from the added signals.

The present invention provides a system for control and guidance of an unmanned aerial vehicle (UAV) using modulated laser light in radio frequency (RF) contested environments. The system enables the user to send light signal communications to the UAV from a handheld device. In one embodiment, where the handheld device is capable of being incorporated into a firearm fore-grip with built-in controls that allow for control of the UAV by a user in a shooting/aiming position. The UAV includes an optical array for detecting and receiving the light signal communications, as well as filtering systems for filtering out unnecessary image data for better control in different weather and time conditions, as well as an avoidance system to avoid objects and other UAVs when used in a swarm of UAVs.

The present invention provides a system for control and guidance of an unmanned aerial vehicle (UAV) using modulated laser light in radio frequency (RF) contested environments. The system enables the user to send light signal communications to the UAV from a handheld device. In one embodiment, where the handheld device is capable of being incorporated into a firearm fore-grip with built-in controls that allow for control of the UAV by a user in a shooting/aiming position. The UAV includes an optical array for detecting and receiving the light signal communications, as well as filtering systems for filtering out unnecessary image data for better control in different weather and time conditions, as well as an avoidance system to avoid objects and other UAVs when used in a swarm of UAVs.

The present disclosure provides an apparatus, a system and a method for wireless data transmission by using a display backlight. The apparatus for transmitting wireless data by using a display backlight according to the present disclosure may include: a data storage unit for storing data to be transmitted; a main control unit for reading the data stored in the data storage unit; a signal modulation unit for modulating the data with a predetermined signal modulation method under the control of the main control unit to generate and output a sequence of switching pulse signals; a light source driving circuit for generating backlight driving switching pulse signals according to the sequence of switching pulse signals; and a display backlight member for outputting a sequence of light and shade signals.

The present disclosure provides an apparatus, a system and a method for wireless data transmission by using a display backlight. The apparatus for transmitting wireless data by using a display backlight according to the present disclosure may include: a data storage unit for storing data to be transmitted; a main control unit for reading the data stored in the data storage unit; a signal modulation unit for modulating the data with a predetermined signal modulation method under the control of the main control unit to generate and output a sequence of switching pulse signals; a light source driving circuit for generating backlight driving switching pulse signals according to the sequence of switching pulse signals; and a display backlight member for outputting a sequence of light and shade signals.

Aspects of the present disclosure provide techniques for spatial filtering of multilevel Pulse Amplitude Modulated (PAM) optical signals. An example method is provided for operations which may be performed by components of an optical network, including but not limited to an optical transceiver. The example method generally includes receiving an optical signal that is pulse amplitude modulated (PAM) to encode information of a network packet as a series of optical signal pulses transmitted via an optical fiber, performing spatial filtering, at a transition from the optical fiber to a receiver, on the optical signal, and performing demodulation of the spatially filtered optical signal to decode the information of the network packet.

Aspects of the present disclosure provide techniques for spatial filtering of multilevel Pulse Amplitude Modulated (PAM) optical signals. An example method is provided for operations which may be performed by components of an optical network, including but not limited to an optical transceiver. The example method generally includes receiving an optical signal that is pulse amplitude modulated (PAM) to encode information of a network packet as a series of optical signal pulses transmitted via an optical fiber, performing spatial filtering, at a transition from the optical fiber to a receiver, on the optical signal, and performing demodulation of the spatially filtered optical signal to decode the information of the network packet.

The Adaptable Pulse Position Modulation (APPM) optical communication system and process facilitate wireless communications through turbid mediums including, but not limited to, smoke, airborne dust, mist, fog, clouds, water, seawater and water-to-air (air-to-water) interfaces by controlling the signal gain at the optical detector and controlling of the signal encoding to allow high data rate operation when the signal to noise ratio is high. The system also supports signal encoding redundancy to maintain good connectivity at the cost of the communication channel data rate as the signal to noise degrades.