Industrial Technology Research Institute

Radiant Opto-electronics Corporation

Wei-Wen Hu

Chun-Yi Sun

Jon-Hong Lin

Yu-Hsien Chiu

Yun-Yen Chen

Peng-Hsiang Wu

Yung-Ching Huang

Chih-Peng Li

A method of demodulating a signal packet includes steps of: determining whether a pulse width of each of pulses of one of bits of the signal packet is associated with bitor bit; updating first counting data associated with a number of the pulses that define bit, and determining whether the first counting data is greater than a first threshold value; deciding that said one of the bits of the signal packet is a bit; updating second counting data associated with a number of the pulses that define bit, and determining whether the second counting data is greater than the second threshold value; deciding that said one of the bits of the signal packet is a bit

Method of demodulating a signal packet, a communication system and a lighting device

A lamp control system includes at least one first lamp network, at least one second lamp network and a lamp control gateway. The first lamp network is configured to emit light and to transmit a first message, and includes a first physical layer. The second lamp network is configured to emit light and to transmit a first message, and includes a second physical layer different from the first physical layer. The lamp control gateway includes a processing module that is configured to receive the first message and the second message and to convert the first message and the second message in such a way that a first converted message and a second converted message comply with a predefined protocol.

Lamp control system and control system

The present invention relates to a method and an apparatus of transmitting data via a multi-protocol single-medium network. The method includes initializing a network; transmitting messages in the network; setting up the size and the protocol of the messages and assigning the messages to a multi-protocol stack of the PHY layer based on a network time sharing multitasking principle; assigning each of the messages to a proper time slot; checking whether or not all messages are assigned to the proper time slots; if yes, transmitting the messages; and receiving the messages by a network device and transmitting the messages to another network device via a single-medium network.

Method and apparatus of transmitting data via a multi-protocol single-medium network

The invention relates to an orthogonal frequency division multiplexing system with PN-sequence. In the synchronization of the invention, both timing offset and frequency offset are estimated and compensated by utilizing a time and frequency synchronization device. In addition, the PN-sequence with the cyclic prefix is added to the OFDM symbol before transmitting. The time and frequency synchronization device of the invention comprises two synchronization circuits from the cyclic prefix and PN-sequence when calculating the timing offset and frequency offset of receiving signal. As a result, the OFDM system of the invention not only has better performance in fading channel, but also has the better bandwidth utilization without extra bandwidth for transmitting the PN-sequence.

Growing community of inventors

Kaohsiung, Taiwan

Wei-Wen Hu