Inventors list |
Assignees list |
Classification tree browser |
Top 100 Inventors |
Top 100 Assignees |
Guey
Jiann-Ching Guey, Fremont, CA US
| Patent application number | Description | Published |
|---|---|---|
| 20100260103 | Distributed Antenna System - A wireless communication network employs a distributed antenna system to provide radio coverage. The wireless communication network comprises a plurality of access points providing service in respective coverage areas. The access point within each coverage area connects to a plurality of antennas that are widely distributed within the coverage area. Radio resources at antennas within the overlapping region of two or more neighboring coverage areas are shared by the access points in the neighboring coverage areas according to a multiple access scheme. The sharing of radio resources within the overlapping region of two or more coverage areas allows the overlapping region to be enlarged, thereby providing more time to complete a handover. | 10-14-2010 |
| 20100278047 | System and Method for Parameter Estimation with Interference Suppression in a Telecommunications Network - A system, method and node of implementing interference suppression for estimation of a signal parameter of a base station transmission at a User Equipment (UE) in a telecommunications network with irregular reference signal patterns assigned to base stations. A list of base stations for which a parameter of the transmitted signal is to be estimated and a list of OFDM symbols and subcarriers to avoid for each base station are compiled. The compiled list is sent to the UE, which performs measurements for each base station using the received measurement information and simple interference avoidance is performed utilizing OFDM symbols and subcarriers not on the list of OFDM symbols and subcarriers to avoid. The measurements are then sent to the network. | 11-04-2010 |
Zen-Jey Guey, Hsinchu City TW
| Patent application number | Description | Published |
|---|---|---|
| 20090155075 | BLADE PITCH DRIVING APPARATUS FOR WIND DRIVEN GENERATOR - A blade pitch driving apparatus of a wind-driven generator and a driving method therefor are adapted to receive an external electrical power and impel a blade toward a corresponding pitch angle according to a pitch command. The apparatus includes an UPS, a permanent magnet synchronous motor drive (PMSM drive), an AC pitch motor (ACPM) and a hub controller. The hub controller normally switches the external power to the PMSM drive, receives the pitch command and control the ACPM to impel the blade toward the corresponding pitch angle. When the PMSM drive fails or the external electrical power is interrupted, the hub controller switches the electrical power of the UPS to the ACPM and controls the blade being impelled toward a feathered position. | 06-18-2009 |
Zen-Jey Guey, Hsinchu TW
| Patent application number | Description | Published |
|---|---|---|
| 20110144929 | TORSIONAL RESONANCE FREQUENCY MEASURING DEVICE AND METHOD - The invention provides a torsional resonance frequency measuring device and method applicable to a large-scale power generating equipment or a traction motor equipment with a rotating shaft, such as a large power grid-tied wind turbine. The invention is characterized by employing a machine-side converter existing in the grid-tied wind turbine to output direct currents to a three-phase PMSG (permanent magnet synchronous generator), such that a pulse torque is generated to mechanically excite a rotor of the three-phase PMSG. Afterwards, a control circuit of the machine-side converter acquires back electromotive force generated by the mechanically excited rotor so as to calculate the torsional resonance frequency of the overall drive-chain system according to the frequency spectrum of the back electromotive force. | 06-16-2011 |