Samsung Electronics Co., Ltd.

Electronics and Telecommunications Research Institute

Yonsei University

Ji-Won Kang

Chung-Yong Lee

Dong-Seung Kwon

In-Kyeong Choi

Hak-Ju Lee

Jae-Hak Chung

Seung-Hoon Nam

Ye-Hoon Lee

Choong-Il Yeh

Hyong-Woo Ku

The present invention relates to a method of forming a random beam, and a beam forming apparatus. A quantization preprocessor and a random unitary matrix having a predetermined pattern are used to form a beam on a mobile terminal. A base station forms a beam using a codeword index of a quantization codebook received from a mobile terminal and channel quality information corresponding to the codeword index, and the mobile terminal generates the codeword index and the channel quality information using pilot signals generated by the base station. The number of pilot signals is equal to the number of transmitting antennas. Therefore, a codebook that has been known to both the mobile terminal and the base station is used, and the mobile terminal can select the codeword index for quantization, which makes it possible to selectively give diversity and thus improve the system efficiency.

Beam forming method and apparatus

The present invention relates to a precoder and a precoding method in a multi-user multi-antenna communication System. When a transmission part () having a plurality of antennas transmits a plurality of signals to a receiving part () having an antenna, the precoder and the precoding method using the same prevents System performance degradation caused by interference signals and efficiently reduces transmission power while changing the constellation rotary angle. When the power is controlled by using the precoder, the System performance is enhanced while not damaging the structural gain of the existing multi-user multi-antenna precoder.

Precoding device and method in wireless communication system

Provided is a scheduling apparatus and method for allocating resources to individual users in a multiantenna system. The method includes determining a ratio of time slots to be allocated according to a ratio desired by each of the terminals in every specific time slot interval, calculating a channel capacity average and a standard deviation for each terminal according to channel capacity reported from each terminal for a specific time, and determining, based on the determined ratio of time slots, a terminal to which a specific time slot is to be allocated according to the channel capacity average and the standard deviation, calculated for each terminal, and the last reported channel capacity.

Apparatus and method for scheduling resources in a multiantenna system

Growing community of inventors

Incheon, South Korea

Ji-Won Kang