Sony Corporation

Other

Panasonic Corporation

Nakagawa Laboratories, Inc.

Shinichiro Haruyama

Lachlan Bruce Michael

Masayoshi Abe

Veselin Brankovic

Yukitoshi Sanada

Ryuji Kohno

Eiji Shiohama

Noboru Sasho

Shojirou Kido

Shuji Suzuki

Yasuhiro Koike

Hamid Amir-Alikhani

Robert Morelos-Zaragoza

Takaaki Ishigure

Masao Nakagawa

Francis Swarts

Toshihiko Komine

Shogo Kitano

Yasuo Sugawara

Pieter Van Rooyen

The visible light communication device includes a control circuit configured to repeat a transmission process of transmitting a communication signal through modulating an intensity of visible light to be emitted from a light source. The control circuit is configured to, in the transmission process, arbitrarily select a time slot for transmission from a plurality of time slots set within a predetermined time period allocated to the transmission process, and transmit the communication signal in the time slot for transmission.

Visible light communication device, lighting fixture including the same, and lighting system

The present invention has been developed considering the above-described problems and aims to provide various structures and applications for illuminative light communication. According to the first aspect of the prevent invention, a broadcast system includes an LED light sourcefor lighting, a power linethat supplies electric power to the LED light sourcea data modulatorthat modulates and multiplexes a plurality of pieces of data, superimposes the resulting signal on an electric power waveform, and then transmits the resulting superimposed signal waveform to the power lineand a filterthat selectively separates one or more of a plurality of pieces of modulated data on the power line so as to control light intensity or blinking of the LED light source. Data is transmitted through changes in light intensity or blinking of the LED light source.

Illuminative light communication device

A receiving apparatus and transmitting apparatus capable of transmitting and receiving a high speed optical signal and a communication system using the same, including a transmitting apparatus having a conversion circuit for converting serially input data to a plurality of bits of parallel data given predetermined information and an LED array having a number of LED units corresponding to the number of bits of the parallel data from the conversion circuit arranged in an array, wherein the LED units are controlled in light emission in parallel based on bit information of corresponding parallel data to emit optical information signals dispersed in a spatially predetermined range, and of a receiving apparatus having a plurality of photo-diodes arranged in an array for emitting electric signals of levels in accordance with amounts of light received, wherein the photo-diodes output electric signals in parallel.

Receiving apparatus, transmitting apparatus, and communication system

A receiving apparatus and transmitting apparatus capable of reliably transmitting and receiving a high speed optical signal and a communication system using the same, wherein provision is made of a transmitting apparatus comprising a conversion circuit for converting serially input data to a plurality of bits of parallel data given predetermined information and an LED array comprised of LED units of at least a number corresponding to the number of bits of the parallel data from the conversion circuit arranged in an array, wherein the LED units are controlled in light emission in parallel based on bit information of corresponding parallel data to emit information light dispersed in a spatially predetermined range, and of a receiving apparatus having a photo-diode array comprised of a plurality of photo-diodes for emitting electric signals of levels in accordance with amounts of light received arranged in an array, wherein the photo-diodes output electric signals in parallel, for selecting information in accordance with the information light based on the plurality of electric signals output in parallel from the photo-diode array, converting the selected parallel data to serial data, and outputting the same.

A receiving apparatus and transmitting apparatus capable of transmitting and receiving a high speed optical signal and a communication system using the same, including a transmitting apparatus having a conversion circuit for converting serially input data to a plurality of bits of parallel data given predetermined information and an LED array having a number of LED units corresponding to the number of bits of the parallel data from the conversion circuit arranged in an array, wherein the LED units are controlled in light emission in parallel based on bit information of corresponding parallel data to emit optical information signals dispersed in a spatially predetermined range, and of a receiving apparatus having a plurality of photo-diodes arranged in an array for emitting electric signals of levels in accordance with amounts of light received, wherein the photo-diodes output electric signals in parallel, for selecting information in accordance with the optical information signal based on the electric signals output in parallel from the photo-diode array, for converting the selected parallel data to serial data, and for outputting the same.

The universal platform for the SDR of the present invention employs the direct conversion approach with the n-port MMIC followed by reconfigurable reprogrammable devices such as DSP's or FPGA's. The universal platform is based on the linear operation of the devices. Thus, the DC offset problem may be solved. It is also possible to support very wide bandwidths compared with conventional I/Q receivers. Therefore, the present universal platform is suitable for multimode and multiband communications.

Universal platform for software defined radio

Growing community of inventors

Kanagawa, Japan

Shinichiro Haruyama