| Information and Communications University Research and Industrial Cooperation Group Patent applications |
| Patent application number | Title | Published |
|---|
| 20090286494 | Iterative tree search-based precoding technique for multiuser mimo communication system - An iterative tree search-based preceding method for a multi-user Multi-Input Multi-Output (MIMO) communication system includes determining a reference value of a cumulative branch metric of a candidate symbol, eliminating candidates having values that exceed the determined reference value of the cumulative branch metric of the candidate symbol, and registering values, which do not exceed the determined reference value of the cumulative branch metric of the candidate symbol, as entries, and selecting the least value from the values registered as the entries. Thereby, the method has low complexity and similar performance compared to an existing Sphere Encoding (SE) technique. | 11-19-2009 |
| 20090186646 | COGNITIVE RADIO COMMUNICATION METHOD FOR CONTROLLING SENSING OPERATION AND COGNITIVE RADIO COMMUNICATION APPARATUS ENABLING THE METHOD - A cognitive radio communication apparatus and method to control a sensing operation. The cognitive radio communication apparatus includes an information receiver to receive channel state information associated with a channel occupancy state of a primary system from at least one sensing node of a secondary system; a sensing control unit to control a sensing period of the at least one sensing node according to a change pattern of the channel occupancy state, based on the channel state information; and a control information transmitter to transmit control information associated with the controlled sensing period to at least one member node of the secondary system. | 07-23-2009 |
| 20090108946 | SWITCH, NEGATIVE RESISTANCE CELL, AND DIFFERENTIAL VOLTAGE CONTROLLED OSCILLATOR USING THE SAME - The present invention relates to a switch, a negative resistance cell, and a differential voltage controlled oscillator using the same. The present invention includes a first signal line provided in a first direction, a second signal line provided in parallel with the first signal line, and first to fourth gate electrodes, first to third source electrodes, and first to fourth drain electrodes formed between the first signal line and the second signal line, and provides a switch having electrodes in the order of the first gate electrode, the first drain electrode, the second gate electrode, the first source electrode, the third gate electrode, the second drain electrode, the fourth gate electrode, the second source electrode, the fifth gate electrode, the third drain electrode, the sixth gate electrode, the third source electrode, the seventh gate electrode, the fourth drain electrode, and the eighth gate electrode. According to the present invention, a differential voltage controlled oscillator for RF oscillation operation in the broadband area is realized by minimizing generation of parasitic components. | 04-30-2009 |
| 20080209231 | Contents Encryption Method, System and Method for Providing Contents Through Network Using the Encryption Method - Disclosed are a contents encryption method, and a system and method for providing contents through a network using the contents encryption method. In order to provide contents through the network more securely, at least one piece of contents and corresponding metadata are recursively multi-encrypted at least once, and encrypted data are then provided. In particular, encrypted positions of the contents and corresponding decryption information are expressed as metadata, and the metadata include parameter information on respective encryption tools used for multi-encryption, an order of the applied encryption tools, positions of the encryption tools, and a list of encryption tool substitutes. The metadata are provided when the contents are provided. Therefore, the contents provider and receiver can more safely and systematically manage the metadata including contents decryption information, and multimedia are efficiently protected, managed, and controlled. | 08-28-2008 |
