| Patent application number | Description | Published |
|---|
| 20090074047 | APPARATUS AND METHOD FOR ESTIMATING SIGNAL TO INTERFERENCE AND NOISE RATIO IN A WIRELESS COMMUNICATION SYSTEM - An apparatus and method for estimating a Signal to Interference plus Noise Ratio (SINR) in a wireless communication system are provided. The method includes processing a received signal by Orthogonal Frequency Division Multiplexing (OFDM) demodulation to convert the received signal into frequency-domain data, selecting ranging data from the frequency-domain data, multiplying the selected ranging data by a ranging code to perform code demodulation, calculating at least one norm value and at least one coherent norm value by bundle for the code-demodulated data and estimating an SINR using the calculated at least one norm value and at least one coherent norm value. | 03-19-2009 |
| 20090122754 | SYSTEM AND METHOD FOR ALLOCATING RESOURCES IN A COMMUNICATION SYSTEM - A method and system for allocating resources in a communication system are provided. The system includes a Base Station (BS) for allocating persistent resources included in a persistent resource area to one or more a Mobile Stations (MS) using the persistent resource area, for allocating an Identifier (ID) indicating an allocation order of the persistent resources to each of the one or more the MS using the persistent resource area, for transmitting resource allocation information including the ID and the number of slots included in the persistent resources to each of the one or more MSs using the persistent resource area, and for allocating dynamic resources to one or more MSs using a dynamic resource area, after the persistent resource allocation is completed for all of the one or more MSs using the persistent resource area. The persistent resource area includes successive persistent resources along a time axis and along a frequency axis. | 05-14-2009 |
| 20090135774 | APPARATUS AND METHOD FOR TRANSMITTING VOICE PACKET IN WIRELESS COMMUNICATION NETWORK - An apparatus and method for transmitting a voice packet in a wireless communication network are provided. The method includes generating voice data of a fixed length, which includes a voice packet having a length that is determined according to a rate of the voice packet, and a Forward Error Correction (FEC) code, and transmitting the generated voice data through a fixed resource. | 05-28-2009 |
| 20090147964 | APPARATUS AND METHOD FOR REMOVING AN ECHO SIGNAL IN A SIGNAL TRANSMISSION/RECEPTION APPARATUS OF A COMMUNICATION SYSTEM - A method and apparatus for removing an echo signal in a signal transmission/reception apparatus of a communication system are provided. A signal transmission/reception apparatus determines an echo channel impulse response using a reception signal, generates an echo signal removing coefficient using the echo channel impulse response, removes an echo signal from the reception signal using the echo signal removing coefficient, and transmits a signal in which the echo signal is removed. | 06-11-2009 |
| 20090149130 | APPARATUS AND METHOD FOR REMOVING AN ECHO SIGNAL IN A SIGANL TRANSMISSION/RECEPTION APPARATUS OF A COMMUNICATION SYSTEM - A method and apparatus for removing an echo signal in a signal transmission/reception apparatus of a communication system is provided. A signal transmission/reception apparatus estimates an input channel response using a training sequence, generates a first signal by removing the input channel response from a first reception signal, detects an echo channel impulse response using the first signal, detects an echo signal removing coefficient using the echo channel impulse response, generates a second signal in which an echo signal is removed by applying the echo signal removing coefficient to a second reception signal, and removes the second signal from a third signal, wherein the first signal is received prior to receiving the second signal and the second signal is received prior to receiving the third signal. | 06-11-2009 |
| 20090215390 | METHOD AND APPARATUS FOR ESTIMATING/REMOVING ECHO SIGNAL USING CHANNEL COEFFICIENT PREDICTING TECHNIQUE IN MULTI-CARRIER SYSTEM - A method and an apparatus are provided for estimating and removing interference of a signal at a wireless repeater operating in a multi-carrier system. In the method, a current echo channel linear prediction coefficient, which represents a coefficient between a current train signal section and a previous train signal section, is estimated using a current echo channel coefficient estimated in the current train signal section and a previous echo channel coefficient generated in the previous train signal section. A next echo channel coefficient is estimated using the current echo channel coefficient, the previous echo channel coefficient, and the current echo channel linear prediction coefficient. An echo channel coefficient outside a train signal section is estimated using the current echo channel coefficient and the next echo channel coefficient. | 08-27-2009 |
| 20100040010 | APPARATUS AND METHOD FOR TRANSMITTING AND RECEIVING INFORMATION THROUGH FAST FEEDBACK CHANNEL IN BROADBAND WIRELESS COMMUNICATION SYSTEM - An apparatus and method for transmitting and receiving information through a fast feedback channel in a broadband wireless communications system are provided. The apparatus includes a generator for generating a quasi-orthogonal signal stream corresponding to a codeword to be fed back, a plurality of mappers for mapping the quasi-orthogonal signal stream to a plurality of bundles in the fast feedback channel by using different mapping patterns, and a transmitter for transmitting the quasi-orthogonal signal stream mapped to the plurality of bundles. | 02-18-2010 |
| 20100056067 | APPARATUS AND METHOD FOR TRANSMITTING AND RECEIVING FAST FEEDBACK INFORMATION IN BROADBAND WIRELESS COMMUNICATION SYSTEM - An apparatus and method for operating a fast feedback channel in a broadband wireless communication system are provided. The method includes generating and transmitting a feedback signal through a fast feedback channel of a first mode, determining to switch a mode of the fast feedback channel from the first mode to a second mode, transmitting a signal for requesting the mode switching of the fast feedback channel through the fast feedback channel, and generating and transmitting a feedback signal through a fast feedback channel of the second mode. | 03-04-2010 |
| 20100189040 | APPARATUS AND METHOD FOR TRANSMITTING INFORMATION VIA UPLINK CONTROL CHANNEL IN OFDMA COMMUNICATION SYSTEM - An apparatus is capable of transmitting information via an uplink control channel in an Orthogonal Frequency Division Multiple Access (OFDMA) communication system. Uplink control information is encoded to obtain a predetermined bit string. A signal sequence corresponding to the predetermined bit string is generated. The signal sequence is cyclic-shifted according to a predetermined rule. The cyclic-shifted signal sequence is controlled according to a subframe length. Therefore, reception performance deterioration of an uplink control channel allocated to an irregular subframe can be minimized. | 07-29-2010 |
| 20100227638 | METHOD AND APPARATUS FOR POWER CONTROL IN A WIRELESS COMMUNICATION SYSTEM - A method and apparatus for power control in a wireless communication system are provided. A Mobile Station (MS) operation method for power control in a wireless communication system includes assigning an UpLink (UL) control channel to the MS from a Base Station (BS), determining a location to receive a Transmit Power Control (TPC) command based on the UL control channel, and receiving a TPC command in the determined location and increasing or decreasing transmit power, thus advantageously being capable of reducing an overhead for power control command assignment information. | 09-09-2010 |
| 20100331036 | UPLINK (UL) POWER CONTROL APPARATUS AND METHOD IN BROADBAND WIRELESS COMMUNICATION SYSTEM - An uplink (UL) power control apparatus and method in a broadband wireless communication system are provided. The Mobile Station (MS) includes a power controller for calculating a power compensation value using a last transmit power in a previous closed loop power control when a power control mode is changed to an open loop power control, and determining a transmit power according to the open loop power control using the power compensation value; and a transmitter for adjusting and transmitting the transmit power of a UL signal under control of the power controller. | 12-30-2010 |
