Samsung Electronics Co., Ltd.

Icu Research Industrial Cooperation Group

Nam-shik Kim

Jung-ho Kim

Hyun-Cheol Park

Sung-Won Lee

Young-Gon Choi

Yong-Sung Roh

Joong-soo Ma

Hae-lyong Kim

Provided are a network-coding apparatus and method which can increase a data communication capacity in a communication environment to which an error-correction code (ECC) is applied. The network-coding apparatus includes a received signal processing unit receiving at least two signals, and decoding the at least two received signals; and a transmission signal processing unit receiving the at least two decoded signals from the received signal processing unit, merging the at least two decoded signals, and generating a merged transmission signal.

Apparatus and method for network-coding

Provided is a fine frequency synchronization method of a WiBro system, and particularly, a fine frequency synchronization method which measures a spread degree of a received signal of an adjacent subcarrier using orthogonality of PN sequences and thereby estimates a frequency offset, in a base station or a wireless repeater without using a GPS receiver. The fine frequency synchronization method includes: (a) performing despreading on received adjacent subcarrier sequences, using a PN sequence transmitted from a transmitting party; (b) obtaining ratios of correlative values obtained by the despreading; and (c) estimating a frequency offset on the basis of the ratio of correlative values. Accordingly, fine frequency offset estimation with relatively low complexity is possible without using a GPS receiver in a WiBro environment where interference signals of other base stations or repeaters exist.

Method and apparatus for fine frequency synchronization in wireless broadband (WiBro) system without using global positioning system (GPS) receiver

Growing community of inventors

Yongin-si, South Korea

Nam-shik Kim