摘要:
There is provided a method of determining a Modulation and Coding Scheme (MCS). The method includes predicting an error rate of a symbol and determining a MCS of the symbol using the error rate. Since a MCS level is determined using an estimated error rate and user data is scheduled, multi-user diversity gain can be obtained and the transmission rate can be improved.
摘要:
A method for feeding back Channel Quality Information (CQI) by a terminal in a Multi-User Multi-Input Multi-Output (MU-MIMO) communication system is provided. The method includes receiving a signal from a base station, determining a lower limit of an average Signal to Interference plus Noise Ratio (SINR) for the received signal, and determining the lower limit of an average SINR as CQI, and feeding back the CQI to the base station.
摘要:
An apparatus for providing UGC including a UGC manager storing UGC provided from UGC creators and making a list of UGC provided, an advertisement manager receiving advertisements and advertising information from sponsors attempting to combine an advertisement to a specific UGC, making a list of advertisements and advertising information, and providing the list of advertisements and advertising information to the UGC creators, a UGC provider inserting an advertisement selected by the UGC creator into the UGC, removing the advertisement from the UGC when a total advertising budget is exhausted or in response to a request from a sponsor, and providing the UGC to a user in response to a request from the user, and an advertisement exposure calculator calculating an advertising price by counting mere exposure and click-through exposure of the advertisement combined to the UGC.
摘要:
There is provided a method of determining a Modulation and Coding Scheme (MCS). The method includes predicting an error rate of a symbol and determining a MCS of the symbol using the error rate. Since a MCS level is determined using an estimated error rate and user data is scheduled, multi-user diversity gain can be obtained and the transmission rate can be improved.
摘要:
Methods and apparatus for spatial multiplexing in a closed-loop Multi Input Multi Output (MIMO) system are provided. In a method of operating a receiver in an MIMO system, a signal transmitted by a transmitter is received. Blockwise-Orthogonalized Spatial Multiplexing (B-OSM) is performed on the received signal. Feedback information determined by performing the B-OSM on the received signal is fed back to the transmitter.
摘要:
A method of fabricating a light source includes providing a semiconductor light source emitting light when power is applied thereto, supplying power to the semiconductor light source, receiving light emitted by the semiconductor light source and performing a first measurement of optical properties of the received light, receiving light emitted by the semiconductor light source after a period of time has elapsed from the first measurement and performing a second measurement of optical properties of the received light, determining whether the semiconductor light source is defective or not by comparing the results of the first measurements of optical properties and the second measurements of optical properties, and constructing the light source including the semiconductor light source by providing peripheral parts thereof, wherein the semiconductor light source is determined as being normal as a result of determining whether the semiconductor light source is defective or not.
摘要:
Methods and apparatus for spatial multiplexing in a closed-loop Multi Input Multi Output (MIMO) system are provided. In a method of operating a receiver in an MIMO system, a signal transmitted by a transmitter is received. Blockwise-Orthogonalized Spatial Multiplexing (B-OSM) is performed on the received signal. Feedback information determined by performing the B-OSM on the received signal is fed back to the transmitter.