Postdata Co., Ltd. Patent applications |
Patent application number | Title | Published |
20110026482 | METHOD AND APPARATUS FOR PILOT SIGNAL TRANSMISSION - A method and apparatus for pilot signal transmission is disclosed, which is capable of improving efficiency in a wireless communication system, the method comprising transmitting an uplink transmission frame for a first sector or cell by a mobile station through the use of basic pilot pattern in a resource block and transmitting an uplink transmission frame for a second sector or cell by the mobile station through the use of shift pilot pattern which is not overlapped with the basic pilot pattern in the resource block. | 02-03-2011 |
20090232080 | FREQUENCY REUSING METHOD IN WIRELESS COMMUNICATION SYSTEM AND RADIO ACCESS STATION SYSTEM FOR THE SAME - The present invention relates to a wireless communication system, and more particularly, to a frequency reusing method for efficiently transmitting traffics in a radio access station system. A frequency reusing method in a wireless communication system including a coverage region, which has first, second and third regions comprises (a) transmitting traffics by assigning a total frequency band, which includes different three sub-frequency bands, to the first, second and third regions during a first interval; and (b) transmitting the traffics by respectively assigning the different three sub-frequency bands to the first, second and third regions during a second interval. | 09-17-2009 |
20090003423 | Frequency Offset Estimation Apparatus and Method in Wireless Communication System - The present invention relates to an apparatus and method for estimating a frequency offset in a wireless telecommunication system. The present invention does not estimate an initial frequency offset using a preamble which is the initial symbol of a frame upon estimation of the frequency offset in the wireless telecommunication system, but estimates a frequency offset using correlation of a cyclic prefix (CP) existing in each symbol, thereby eliminating a need to reproduce information about separate preamble signals and preamble signals, and easily estimating a frequency offset using only input signals. | 01-01-2009 |
20080317247 | Apparatus and Method for Processing Eap-Aka Authentication in the Non-Usim Terminal - Disclosed are an apparatus and a method for processing authentication using Extensible Authentication Protocol-Authentication and Key Agreement (EAP-AKA) in a non-Universal Subscriber Identity Module (USIM) terminal without a USIM card. | 12-25-2008 |
20080317176 | Automatic Gain Control Apparatus and Method in Wireless Telecommunication System - The present invention relates to an automatic gain control apparatus and method in a wireless telecommunication system which measures the strength of received signals using preamble symbols and automatically control the gain of an amplifier based on the measurement results. The automatic gain control apparatus and method according to present invention performs automatic gain control of measuring sample power in a sample unit for input signals, acquiring a sample power average value during a unit symbol period, detecting a maximum value during one frame period for the acquired sample power average value and then calculating a gain control value based on it. | 12-25-2008 |
20080298492 | Apparatus and Method for Estimating Channel in Communication System Supporting of Dm/Ofdma - Disclosed are an apparatus and a method for estimating a channel in a base station when using an Optional Partial Usage of Sub-Channels (OPUSC) mode in an uplink channel of a communication system supporting Orthogonal Frequency Division Multiplexing/Orthogonal Frequency Division Multiple Access (OFDM/OFDMA). In order to estimate the channel in the OFDM/OFDMA communication system, according to the present invention, pilots and data are extracted from input signals, phase change caused by time delay is estimated using the extracted pilots and data, and a channel estimation value is obtained by reflecting the estimated phase change. | 12-04-2008 |
20080279297 | Method and Apparatus for Decoding Transmission Signals in a Wireless Communication System - Disclosed is a method and an apparatus for decoding transmission signal. The method includes the steps of: receiving transmission signal including repeated symbols; deinterleaving the received signal; mutually combining the repeated symbols in the deinterleaved signal; and decoding the combined symbols. According to the method, reception performance is improved as compared to a conventional decoding method, and system performance is improved by reducing the loss of frame information included in an FCH. | 11-13-2008 |