Soochow University

Zile Jiang

Gangxiang Shen

Xiaodi You

Chaoran Xiong

Xiaobo Yang

The invention relates to a multi-source wireless optical communication spectrum sensing system, including: a transmit end, configured to transmit an optical signal, the transmit end including multiple LEDs; and a secondary user terminal, configured to: receive the optical signal transmitted by the transmit end, convert the optical signal into an electrical signal, filter out a direct current component in the electrical signal to obtain a filtered electrical signal, sample the electrical signal to obtain sampling data and a corresponding sampling quantity, perform channel estimation based on the sampling quantity and acquired location data of the secondary user terminal to obtain a channel matrix, calculate a detection metric M and a decision threshold K based on the channel matrix, the sampling data, and the sampling quantity, and determine, based on a value relationship between M and K, whether a channel is occupied by a primary user.

Multi-source wireless optical communication spectrum sensing system and method

The present invention provides a 3D wireless optical positioning method and system, including the steps of: arranging two LED lamps on the ceiling to transmit optical information and provide illumination; arranging a receiver including two photodetectors in a receiving plane; calculating the distance between the LED lamps and the photodetectors respectively through the TOA (Time of Arrival) method; and finally determining the actual position and orientation angle of the receiver based on the geometrical relationship between the LED lamps and the photodetectors in the XYZ coordinate system, the two photodetectors having a distance determined as l therebetween and being situated in the same receiving plane, the receiver being situated below the two LED lamps, the range where the receiver is to be positioned being on any side of the plane consisting of the two LED lamps and the origin.

3D wireless optical positioning method and system

The present invention provides a wireless optical communication data transmission apparatus and method, including a transmit module and a receive module, where the transmit module includes a transmission gate, and the transmit module is configured to convert serial data into multipath control signals to control the transmission gate to output an electrical signal, convert the electrical signal into an optical signal, and transmit the optical signal to the receive module; and the receive module includes a peak value detector and a comparator group, and the receive module is configured to convert the received optical signal into the electrical signal and output the serial data after threshold determination by the comparator group, where the peak value detector provides a reference voltage to the comparator group according to the received electrical signal, and the comparator group performs voltage division according to the reference voltage to determine a threshold.

Growing community of inventors

Suzhou, China

Zile Jiang