Sang Won Son

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We present a highly-configurable, low-power, low-area, SAW-less TX architecture that is based on a dynamically-biased power mixer. All FDD/TDD bands for 4G LTE and 3G WCDMA/HSPA are supported in addition to 2G quad bands. The power-mixer bias current is dynamically adjusted based on the instantaneous baseband signal swing using a fully-differential hybrid(More)
To meet ever-growing demands for higher mobile data-rates, LTE standards continue to evolve. While carrier aggregation (CA) improves data-rates, it requires wider aggregated signal bandwidth that limits the number of users that can be serviced. Techniques like 256QAM and 4×4 MIMO are attractive because improvements do not need wider signal bandwidth. To(More)
This thesis is devoted to the study of string theory in AdS3 and its applications to recent developments in string theory. The difficulties associated with formulating a consistent string theory in AdS3 and its underlying SL(2, R) WZW model are explained. We describe how these difficulties can be overcome by assuming that the SL(2, R) WZW model contains(More)
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