Lg Electronics Inc.

Yonsei University

Doosan Mobility Innovation Inc.

Soon Suk Roh

Han Byul Seo

Byoung Hoon Kim

Kaibin Huang

Dong Ku Kim

Hyuk Jin Chae

Sung Yoon Cho

Yong Shik Chong

A fuel cell power pack for a drone and a state information monitoring method thereof are provided. The fuel cell power pack for a drone may include a power pack main body coupled to the drone, a fuel cell stack module disposed in the power pack main body to receive fuel and air to supply a power to the drone, a state information detector configured to detect state information of the fuel cell stack module, a power pack communicator configured to transmit information to an outside of the power pack main body or receive the information from the outside thereof by wire or wirelessly, and a power pack controller configured to control the power pack communicator to transmit the state information of the fuel cell stack module detected by the state information detector to the outside of the power pack main body.

Fuel cell power pack for drone and state information monitoring method thereof

A feedback method for interference alignment in wireless network having K transmitters and K receivers, the method including: transmitting, by a transmitter n&#x2212;1, a precoding vector of the transmitter n&#x2212;1 (n being an integer between 2 and K&#x2212;1) to a receiver n+1; calculating, by the receiver n+1, a precoding vector of a transmitter n using the precoding vector of the transmitter n&#x2212;1; and transmitting, by the receiver n+1, the precoding vector of the transmitter n to the transmitter n.

Feedback method for interference alignment in wireless network

A method for interference alignment in wireless network having 3 transmitters and 3 receivers which are equipped with M antennas is provided. The method comprising: transmitting, performed by each of the 3 transmitters, a pilot signal known to the 3 receivers; estimating, performed by each of the 3 receivers, each channel from transmitter; transmitting, performed by each of the 3 receivers, feedback information to target transmitter; and determining, performed by transmitter 2 and transmitter 3, a precoding vector; wherein a degree of freedom (DoF) of a transmitter 1 is (M/2&#x2212;&#x3b1;), a DoF of the transmitter 2 or the transmitter 3 is M/2.

Method for interference alignment in wireless network

A power control method for interference alignment in wireless network having K transmitters and K receivers is provided. The method includes: receiving, performed by receiver n (n is an integer, 1&#x2266;n&#x2266;K&#x2212;1), a power indication signal of transmitter n+1 from the transmitter n+1; determining, performed by the receiver n, power of transmitter n; and transmitting, performed by the receiver n, a power indication signal of transmitter n to the transmitter n, wherein the power of transmitter n is determined based on a residual interference of the receiver n, and the power indication signal of transmitter n indicates a minimum transmission power or a maximum transmission power of transmitter n.

Growing community of inventors

Seoul, South Korea

Soon Suk Roh