Industrial Technology Research Institute

National Chi Nan University

Hsin-An Hou

Chiu-Ping Wu

Jen-Yuan Hsu

Hung-Hsiang Wang

Yung-Han Chen

Shih-Hao Fang

Wan-Yi Lin

Chun-Nan Liu

Shyue-Win Wei

Chao-Wei Chen

Harmoko Habibi Roni

A communication system includes a distributed unit (DU). The DU estimates distance information, converts the distance information into a transit time difference, and adjusts a transmission window according to the transit time difference, in which start and end points of the transmission window move according to the transit time difference.

Communication system and communication method

A reconfiguration intelligent surface device and a beamforming method thereof, the beamforming method adapted to the reconfiguration intelligent surface device is described below. A timing synchronization signal is received. A frame boundary synchronized with a radio signal transmission/reflection device is established according to the timing synchronization signal. Beam control information is received. A reflected beam is formed by reflecting a radio signal beam transmitted or reflected by the radio signal transmission/reflection device according to the beam control information based on the frame boundary synchronized with the radio signal transmission/reflection device.

Reconfiguration intelligent surface device and beamforming method thereof

The present disclosure proposes a method of cooperative MIMO wireless communication, and a base station using the same. A base station would have a plurality of radio remote units (RRUs), and each of the RRUs may have a specific radio coverage and a plurality of antennas coupled to each of the RRUs. The function of the base station may include receiving a UE information, receiving a service flow, deriving a service type of the service flow, and determining a MIMO scheme, modulating the service flow into a MIMO stream according to the MIMO scheme, allocating a plurality of resource blocks, wherein the resource blocks may correspond to a portion or all of the RRUs, distributing the MIMO stream into a plurality of downlink sub streams and transmitting the downlink sub streams through the resource blocks by the RRUs corresponding to the resource blocks.

Method of cooperative MIMO wireless communication and base station using the same

A radio frequency signal transceiving method and device thereof are proposed. The method is configured for a radio equipment controller (REC) of a radio frequency signal transceiving device to exchange radio signals between a plurality of Baseband Units (BBUs) and a plurality of Radio Equipments (REs) that respectively connected to a plurality of Remote Radio Units (RRUs), and the method includes but not limited to the step of: receiving a first radio downlink signal at least, generating a first downlink control signal, modulating the first radio downlink signal at least into a first analog downlink signal at a first frequency according to the first downlink control signal, multiplexing the first analog downlink signal and the first downlink control signal into an integrated analog downlink signal, converting the integrated analog downlink signal into an optical downlink signal, and transmitting the optical downlink signal.

Radio frequency signal transceiving device and method thereof, self-optimizing optical transmission device and method thereof

A method for controlling a distributed antenna system includes the following steps. A target propagation delay value is defined according to a transmit/receive transition gap. Propagation delay time of a service antenna unit corresponding to a base station is estimated. The service antenna unit is turned on to perform downlink signal transmission, and the propagation delay time of the service antenna unit is compensated to the target propagation delay value.

Method, apparatus and system for controlling distributed antenna system

Automatic gain control method and apparatus control a gain of a received signal. While the gain is adjusted and thus converges, a finding mode is entered to additionally change the gain at least once according to at least one characteristic value obtained from a relationship between the gain and time, such that the gain approaches a target level. In other embodiments, a tracking mode is further entered to periodically adjust the gain at a period greater than that before when signal strength is being tracked to reduce noise energy introduced. Hence, the embodiments can improve a gain converging speed and reduce the influence of the noise on the communication system in a dynamic receiving environment, and thus enhance the signal receiving performance.

Automatic gain control method and apparatus

A signal transmitting method, a signal receiving method, and a signal receiving device are adapted to an OFDM system. In the signal transmitting method and signal receiving method, double asymmetric training symbols are used for performing time-varying channel response estimation. In the transmitting method, asymmetric pilot sub-carriers are added in data sub-carriers to form a plurality of first and second training symbols. The pilot symbols in the first and second training symbols are asymmetrically configured. In the receiving method, a channel response corresponding to each pilot sub-carrier is estimated by using two adjacent asymmetric pilot symbols. The received data sub-carrier is then restored through the channel response. Through the signal transmitting method and signal receiving method, even in a transmitter or a receiver moving at a high speed, more bandwidths can be used to transfer data, and contents of the transferred data can be correctly estimated.

Growing community of inventors

Taipei, Taiwan

Hsin-An Hou