Shuangfeng
Shuangfeng Han, Suwonsi KR
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20130039401 | METHOD AND APARATUS FOR MIXED ANALOG/DIGITAL BEAMFORMING - A method provides mixed analog/digital beamforming by a transmitter in a mobile communication system. The method includes converting a modulation symbol into a parallel symbol stream, performing digital beamforming on the parallel symbol stream, performing an IFFT operation on the digital-beamformed parallel symbol stream to generate a time-domain symbol, converting the IFFT-operated time-domain symbol into a serial time-domain symbol, inserting a CP into the serial time-domain symbol, performing a DAC operation on the CP-inserted symbol to generate an analog signal, and performing analog beamforming by multiplying the analog signal by the analog beamforming precoder optimized for the first subcarrier transmitted through at least one RF channel. | 02-14-2013 |
Shuangfeng Han, Gyeonggi-Do KR
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20150215148 | COMMUNICATION METHOD AND APPARATUS IN A WIRELESS COMMUNICATION SYSTEM SUPPORTING MULTIPLE OFDM PARAMETER SETS - Communication methods and apparatuses in a wireless communication system are provided. Information relating to Orthogonal Frequency Division Multiplexing (OFDM) parameter sets supported by a Base Station (BS), from among a plurality of OFDM parameter sets, is transmitted to at least one Mobile Station (MS), from the BS, using a default OFDM parameter set. The BS selects at least one OFDM parameter set for the at least one MS, from among the OFDM parameter sets supported by the BS, based on one of a channel state and a mobility of the at least one MS. The BS performs data communication with the at least one MS through the at least one selected OFDM parameter set. Each of the plurality of OFDM parameter sets comprises parameter values representing a Cyclic Prefix (CP) length, a subcarrier spacing, and at least one of an Inverse Fast Fourier Transform (IFFT) size and Fast Fourier Transform (FFT) size. The default OFDM parameter set is determined based on subcarrier spacings of the plurality of OFDM parameter sets | 07-30-2015 |
Shuangfeng Li, Beijing CN
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20150154630 | USE OF INCENTIVES TO ENCOURAGE CONTRIBUTION OF CONTENT IN A CONTROLLED MANNER - Systems, methods, and computer storage mediums are provided for incentivizing users to contribute content in a controlled manner. A method includes receiving content and metadata associated with the content from a user. The content relates to a geolocation and the metadata includes geolocation information that relates to the content. It is then determined whether the content and the associated metadata meet a threshold of specific criteria. The specific criteria is based on a set of rules that determines an amount of points awarded to the user for providing content that satisfies the specific criteria. The specific criteria include at least a geolocation or geolocated area. If the content meets the threshold of the specific criteria, points are awarded to the user. The amount of points is based on a comparison of the content and the associated metadata with the specific criteria. | 06-04-2015 |
20150178561 | Personalized Mapping With Photo Tours - Methods, systems and computer-readable storage mediums encoded with computer programs executed by one or more processors for providing personalized mapping with photo-tours are disclosed. A mapping system provides a map of a geographic region that includes a plurality of selectable image locations within the region, with standardized images of the respective image location that accord with predefined parameters provided by the mapping system. An image location selection from the map is received and it is determined whether the selected image location is associated with one or more photo-tours of non-standardized images that do not according with the predefined parameters. A selection of a particular one of the photo-tours is received, and the set of non-standardized images corresponding to a selected photo-tour for the image location is provided. | 06-25-2015 |