Korea Research Institute of Chemical Technology

Sas Technologies Co., Ltd.

Intellectual Discovery Co., Ltd.

Lg Information & Communications, Ltd.

Hantel Co., Ltd.

Industry-university Cooperation Foundation Hanyang University

Seung-Won Choi

Jong-Cheol Lee

Young-Sik Jung

No-Sang Park

Jin-Il Choi

Kwang-Sook Lee

June Kim

Heung-Jae Im

Churl-Min Seong

Yeon-Joo Choi

Jae-Yang Kong

Chan-Bok Lee

Seung-Heon Hyeon

Bu-Yeon Lee

Hyun-Wook Yang

Chi-Young Ahn

The present invention relates to a multi-antenna subsystem for a SDR (software defined radio) capable of supporting a multi-antenna technique to an antenna system using a multi-antenna subsystem. The multi-antenna subsystem of a multi-antenna system includes an algorithm executing unit for carrying out an algorithm for a multi-antenna technique to be required in the multi-antenna system, a frame synchronization unit for a synchronization acquisition, and a control unit for controlling the algorithm executing unit and the frame synchronization. The algorithm executing unit has a plurality of functional blocks and the functional block has state information, which can be referred by other functional blocks, for supporting SDR system.

Multi-antenna subsystem for software defined radio

A signal processing method is for use in an array antenna system included in a Code Division Access (CDMA) mobile telecommunications network base station. The signal processing method includes initializing a weight vector and a snapshot index; obtaining a gradient of output power of an array antenna to a phase of each of the antennas in the array antenna system at every snapshot and determining whether an adaptive gain is added or subtracted depending on the signature of the gradient to update the phase of each antenna; and determining a weight value for each of the antennas to apply the weight value to a signal received at the corresponding one of the antennas.

Signal processing method for use in an array antenna system in CDMA mobile telecommunications network and recording medium therefor

This invention relates to a signal processing method and apparatus for an adaptive array antenna. The objective is to suggest an adaptive procedure of computing the suboptimal weight vector for an array antenna system that provides a beampattern having its maximum gain along the direction of the mobile target signal source in a blind signal environment, where the transmitted data are not known (or not to be estimated) at the receiver. It is the ultimate goal of this invention to suggest a practical way of enhancing both the communication quality and communication capacity through the optimal weight vector of the array system that maximizes SINR(Signal to Interference&plus;Noise Ratio). In order to achieve this goal, the method of Lagrange multiplier is modified in such a way that the suboptimal weight vector is produced with the computational load of about O(8N), which has been found to be small enough for the real-time processing of signals in most land mobile communications with the digital signal processor (DSP) off the shelf, where N denotes the number of antenna elements of the array.

Signal processing method and apparatus for computing an optimal weight vector of an adaptive antenna array system

Phenylacetamide derivatives

A decision error correcting method that is adopted to a general digital communication system having a decision circuit finding an original message from a received signal to remove a misdecision-to-adjacent symbol. The decision error correcting method includes performing a soft decision for a received suspicious signal with all the candidate symbols, computing error distances between the suspicious signal and all the candidate symbols, computing respective error distances between each candidate symbol and following signals received immediately after the suspicious signal for a predetermined test period of time, adding the error distances for each candidate symbol, comparing sums of the error distances to select a least sum of the error distances, and selecting the candidate symbol and following symbols detected after the selected candidate symbol resulting in the least sum of the error distances as original message symbols corresponding to one suspicious signal and the following signals.

Decision error correcting method of a digital communication system and

N-arylalkylphenylacetamide compounds of formula (I), and pharmaceutically acceptable salts thereof, possess potent analgesic and anti-inflammatory activities. ##STR1##

N-Arylalkylphenylacetamide derivatives

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Seoul, South Korea

Seung-Won Choi