Samsung Electronics Co., Ltd.

Soo-bok Yeo

Jong-han Lim

Bong-Gee Song

Yong-Won Shin

Yong-Sun Hwang

Ho-il Kim

Min-goo Kim

Sang-Min Bae

Ji-Won Ha

Heun-Chul Lee

Jong-Han Lim

Seung-Hwan Won

Kwang-Man Ok

Jeong-Soon Park

Joo-Kwang Kim

Sung-Chul Han

Hung-Su Park

Dong-Sik Kim

Yoo-Chang Eun

Kil-Ho Shin

Se-Jin Kong

Ki-Hwan Jeon

Shin-Woo Kang

Kyung-hoon Won

A method of uplink power control including generating a transmission power control (TPC) sequence from TPC commands received on a series of slots, the series of slots forming one radio frame, calculating a plurality of correlation results by executing correlation calculations between the TPC sequence and a plurality of command sequences, and determining an overall TPC command based on the plurality of correlation results may be provided.

Device and method of uplink power control

A method and an apparatus for measuring a link quality in a wireless communication are provided. The method of a receiver for measuring the link quality in the wireless communication system includes determining a modulation type for each of at least one reception stream received through at least one antenna based on a modulation order and channel information regarding each of signals transmitted from a plurality of transmission antennas, searching for a parameter corresponding to the determined modulation type from a pre-stored parameter table in which parameters for each modulation type are stored, and calculating a channel capacity for each of the at least one reception streams received through the at least one antenna by using the searched parameter.

Method and apparatus for measuring link quality in wireless communication system

An automatic gain control apparatus and method for a compressed mode in a MIMO system are provided. The method includes determining power at a first frequency band using a first receiver, simultaneously determining power at a second frequency band using a second receiver in a compressed mode, if the second receiver changes a power determination frequency band into the first frequency band, correcting the power determination value of the first receiver, and applying the corrected power determination value of the first receiver to the second receiver.

Automatic gain control apparatus and method for compressed mode in MIMO system

An apparatus and a method for selecting a receiver for demodulating a reception signal at a reception end having a plurality of receivers are provided. The method includes determining, a mean and a standard deviation of Signal-to-Noise Ratios (SNRs) of the receivers are determined, estimating a Doppler frequency, determining a statistical value of a modulation order of subframes received in advance, determining SNR estimation values of the receivers based on the determined mean and standard deviation of the receivers, the estimated Doppler frequency, and the determined statistical value of the modulation order of the received subframes, selecting one receiver having a largest SNR estimation value among the determined SNRs of the receivers, and demodulating a reception signal using the selected receiver.

Apparatus and method for receiving signal using rake receiver and equalizer in wireless communication system

A mobile terminal includes a channel estimation module that is maintained in an active state. A controller determines an activation time point of an equalizer weight calculation module for calculating a tap coefficient. The activation time point is earlier than an activation time point of a main equalizer module, and activates the equalizer weight calculation module at the activation time point so as to calculate the tap coefficient. When the equalizer weight calculation module's operation is completed, the controller activates the main equalizer module, detects a mobile terminal ID, activates an interference cancellation module, and controls the main equalizer module to provide a data signal demodulator with the data signal compensated for by the tap coefficient. A demodulator demodulates the compensated data signal.

Method and apparatus for receiving signal in wireless communication system

An apparatus and a method for selecting an operation mode to improve a throughput in a mobile communication system are provided. The apparatus includes a Carrier to Interference and Noise Ratio (CINR) predictor for predicting a probable average and dispersion for a CINR measured using a preamble of a received pilot signal or radio signal, a metric calculator for calculating a throughput for each Modulation and Coding Scheme Level (MCS_Level) by using the probable average and dispersion for the predicted CINR and for selecting an MCS_Level having a maximum throughput, and an operation mode selector for selecting an operation mode of the selected MCS_Level having the maximum throughput.

Apparatus and method for selecting operation mode in MIMO communication system

An apparatus and a method for estimating a channel in a Broadband Wireless Access (BWA) communication system are provided. The apparatus includes a subcarrier demapper for extracting pilot symbols at preset positions for a channel estimation; and a channel estimator for acquiring channel estimate values of subcarriers through an Infinite Impulse Response (IIR) filtering using the pilot symbols provided from the subcarrier demapper and a preset filter factor. Thus, the channel condition can be estimated by taking into account the channel change.

Apparatus and method for estimating channel in broadband wireless access (BWA) communication system

An AGC apparatus and method in a BWA communication system are provided, in which a MAP interpreter detects a beamformed symbol period in an (n&#x2212;1)signal, a symbol power calculator measures an average signal level of a symbol in an nsignal, and a beamforming gain calculator calculates a beamforming gain of the nsignal by adding a beamforming gain of the (n&#x2212;1)signal to a power difference between a signal of a beamformed symbol period and a signal of a non-beamformed symbol period in the nsignal using information about the beamformed symbol period of the (n&#x2212;1)signal and the average signal level of the symbol in the nsignal.

Apparatus and method for automatic gain control in a broadband wireless access communication system

An apparatus for removing a DC offset during frequency direct conversion in a reception device of a wireless communication system. In the apparatus, an adder receives a digital baseband signal comprising a DC component, receives an estimated DC offset value, and calculates a difference between the digital baseband signal with the DC component and the estimated DC offset value. A DC offset calculator receives gain mode information of an analog element of the reception device, and calculates the estimated DC offset value according to the gain mode.

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Suwon-si, South Korea

Soo-bok Yeo