| Patent application number | Description | Published |
|---|
| 20100239041 | METHOD FOR TRANMITTING FEEDBACK INFORMATION IN MULTI INPUT MULTI OUT PUT SYSTEM BASED ON CODEBOOK AND A METHOD FOR TRANSMITTING PRECODING INFORMATION IN MULTI INPUT MULTI OUTPUT SYSTEM USING CODEBOOK- BASES PRECODING SCHEME - A method for transmitting feedback information in a codebook-based multiple-input multiple-output (MIMO) system is disclosed. To transmit the feedback information, a signal is received to discern channel characteristics of the received signal, and a codebook is updated using an extended matrix including a plurality of vector components and using previous feedback information. Feedback information is selected for transmission from the updated codebook in consideration of the channel characteristics of the received signal. | 09-23-2010 |
| 20100309996 | Method of Transmitting Feedback Information for Performing Collaborative Mimo - A method of transmitting information necessary for performing collaborative multi input multi output (MIMO) operation between a mobile station and a base station in order to improve reception performance of the mobile station in a multi-cell environment is provided. The mobile station may receive a feedback channel for the collaborative MIMO which is allocated by a serving base station and transmit a collaborative MIMO indicator including information indicating that the collaborative MIMO is started to the serving base station. In addition, the mobile station may transmit the feedback information of each of the serving base station and a collaborative base station to the serving base station through the feedback channel, and the serving base station may transmit the feedback information to the collaborative base station via a backbone network. The mobile station may receive the collaborative MIMO supported by the serving base station and the collaborative base station. | 12-09-2010 |
| 20100316093 | METHOD FOR DETECTING SIGNALS BASED ON DESPREADING AND METHOD FOR TRANSMITTING SIGNALS FOR THE SAME - A method for detecting signals based on despreading and a signal transmitting method for the same are disclosed. Signals are spread according to the size of at least one spreading band, which is determined in consideration of a correlation degree of a frequency band in a communication system. A reception side which receives the signals detects the signals after despreading with respect to signals which are spread in a frequency band having a correlation degree equal to or greater than a predetermined level as a spreading band, among the reception signals. Thus, the dimension of the detected signals can be decreased. | 12-16-2010 |
| 20100318865 | SIGNAL PROCESSING APPARATUS INCLUDING BUILT-IN SELF TEST DEVICE AND METHOD FOR TESTING THEREBY - A signal processing apparatus according to the present invention includes: a built-in self test device dividing a digital reference clock signal to output an I division signal and a Q division signal, shifting the I division signal and the Q division signal by predetermined angles, converting the shifted I and Q signal into analog signals to output an I testing signal and a Q testing signal; and a signal processing receiving and processing the I testing signal and the Q testing signal. | 12-16-2010 |
| 20110034192 | METHOD FOR AVOIDING INTER-CELL INTERFERENCE IN A MULTI-CELL ENVIRONMENT - A method for avoiding an inter-cell interference (ICI) in a multi-cell environment is disclosed. The method includes restricting the use of a PMI in an interfering cell so as to improve a reception performance of a mobile station located at an interfered cell edge. The mobile station measures a restricted-PMI of the interfering cell, which is prohibited from use in the interfering cell, and transmits the measured restricted PMI to the interfering cell. The use of the restricted PMI is prohibited from use in a mobile station in the interfering cell. | 02-10-2011 |
| 20110096859 | METHOD FOR FEEDBACK AND METHOD FOR CONFIGURING A CODEBOOK IN MULTI-ANTENNA SYSTEM - A feedback method for a multi-antenna system is disclosed. The feedback method for use in the multi-antenna system can reduce an amount of transmission (Tx) feedback information associated with a precoding matrix (i.e., a codebook). For example, a single codebook may include precoding matrixes associated with several ranks. A basic matrix constructing the precoding matrix is extended to a frequency axis, such that it can be used as a Cyclic Delay Diversity (CDD) structure. | 04-28-2011 |
| 20110103339 | Method for Allocating Resources for Edge-Users Cooperative Mimo - A method for allocating fractional frequency reuse (FER) resources to perform cooperative MIMO in a multi-cell environment is disclosed. A cell which requests FER resources decides a band for cooperative MIMO with its neighboring cell, and requests the neighboring cell to allocate the decided band for cooperative MIMO. A cell which receives FER resource request receives a request from a neighboring cell to allocate some or all of FER bands allocated to the neighboring cell as a band for cooperative MIMO, decides whether to grant the request, and allocates some or all of the requested FER bands as the band for cooperative MIMO with the neighboring cell if the request is granted. | 05-05-2011 |
