| Patent application number | Description | Published |
|---|
| 20080317157 | Method for Encoding Space-Time Codes in a Wireless Communication System Having Multiple Antennas - A method of transmitting space-time coded data in a wireless communication system having a plurality of antennas is disclosed. More specifically, the method includes allocating data symbols combined with complex weights to at least two transmit antennas during at least one specified time slot, and transmitting the data symbols combined with complex weights to a receiving end via the at least two transmit antennas during the at least one specified time slot. | 12-25-2008 |
| 20090147868 | METHOD AND APPARATUS FOR TRANSMITTING PILOT SYMBOLS IN WIRELESS COMMUNICATION SYSTEM - A method of transmitting pilot symbols is disclosed. In a communication system performing communications using a plurality of antennas and multiple carriers, the present invention includes the steps of generating a plurality of pilot symbol sequences based on a basic code sequence, data-processing a plurality of the pilot symbol sequences by allocating each of a plurality of the pilot symbol sequences to the multiple carriers, and transmitting each of a plurality of the data-processed pilot symbol sequences via a corresponding one of a plurality of the antennas. | 06-11-2009 |
| 20090220021 | METHOD FOR TRANSMITTING/RECEIVING SIGNAL HAVING SPREAD TRAINING SYMBOL IN MOBILE COMMUNICATION SYSTEM - A method for transmitting/receiving signals in a mobile communication system, a pilot configuration of a mobile communication system capable of transmitting much more data using a conventional pilot signal, a channel estimation method, and a receiving method are disclosed. A method for transmitting a signal equipped with a training symbol in a mobile communication system which includes a transmission end capable of transmitting an output signal equipped with a training symbol for channel estimation of a reception end, includes the steps of: a) adding training symbols having the same amplitude to data symbols transmitted via subcarriers, and calculating the output signal transmitted via the subcarriers; and b) transmitting the calculated output signal via the subcarriers. | 09-03-2009 |
| 20090220023 | METHOD FOR TRANSMITTING SIGNALS IN THE SYSTEM WITH MULTIFUL ANTENNAS - A wireless communication system and more particularly a method for signals in a system using a plurality of antennas are disclosed. In the method for multi-antenna-encoding data symbols to be transmitted through the plurality of antennas, at least two same data symbols multi-antenna-encoded are formed and transmitted repeatedly. Accordingly, it is possible to enhance transmission efficiency. | 09-03-2009 |
| 20090276672 | REPETITIVE TRANSMISSIONS IN MULTI-CARRIER BASED WIRELESS ACCESS TECHNIQUES - Repetitive transmissions in multi-carrier based wireless access techniques may be achieved by providing multiple cyclic delay values for a plurality of carriers, performing a cyclic delay procedure using the multiple cyclic delay values according to the number of repetitive transmission of data symbols to be transmitted to a receiver, and transmitting the cyclic delayed data symbols to the receiver using the plurality of carriers. | 11-05-2009 |
| 20090316822 | METHOD OF TRANSMITTING SIGNALS FOR MULTIPLE ANTENNA SYSTEM - A signal transmission method for use in a multi-antenna system includes: receiving a complex signal using N antennas and M timeslots as a single unit, and generating a space-time code (STC) for performing interleaving and phase-shifting operations of the received complex signal; and applying the space-time code (STC) to the received complex signal, and transmitting the resultant signal. Therefore, the signal transmission method provides a space-time code (STC) provides a space-time code (STC) having higher performance and lower encoding complexity, and can effectively transmit the signal via the multi-antenna system. | 12-24-2009 |
| 20090323863 | SIGNAL GENERATION USING PHASE-SHIFT BASED PRE-CODING - A phase-shift based pre-coding scheme used in a transmitting side and a receiving side that has less complexity than those of a space-time coding scheme, that can support various spatial multiplexing rates while maintaining the advantages of the phase-shift diversity scheme, that has less channel sensitivity than that of the pre-coding scheme, and that only requires a low capacity codebook is provided. | 12-31-2009 |
| 20100061477 | DATA TRANSFER METHOD USING PHASE-SHIFT BASED PRECODING AND TRANSMITTER IMPLEMENTING THE SAME - A method of transmitting data using phase-shift-based precoding in a multiple antenna system using a plurality of subcarriers is disclosed. More specifically, the method includes determining a phase-shift-based precoding matrix for transmitting the data by adjusting a transmission phase angle for each antenna, applying an offset for applying offset information fed back from a receiving terminal to the determined precoding matrix, and performing precoding by multiplying the offset applied precoding matrix by a symbol of each subcarrier. | 03-11-2010 |
| 20100074360 | SIGNAL GENERATION USING PHASE-SHIFT BASED PRE-CODING - A phase-shift based pre-coding scheme used in a transmitting side and a receiving side that has less complexity than those of a space-time coding scheme, that can support various spatial multiplexing rates while maintaining the advantages of the phase-shift diversity scheme, that has less channel sensitivity than that of the pre-coding scheme, and that only requires a low capacity codebook is provided. | 03-25-2010 |
| 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 |
| 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 |
