Euntaek Lim

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We focus on the throughput-maximization problem in the downlink of code-division multiple-access (CDMA) data networks. Proper transmission-rate scheduling of data service in downlinks can reduce intracell interference, hence maximizing the throughput of the downlink. A variety of research has been done on the use of transmission-rate scheduling to maximize(More)
Cognitive radios require spectrum sensing. IEEE 802.22 defines constraints on conceivable spectrum sensing techniques. In order to fulfill theses constraints on the required detection probability and allowed false alarm probability, the signal sensing requires a certain sensing time period and an appropriately adjusted decision threshold. This manuscript(More)
Spectrum sensing is a central part in a cognitive radio and therefore a thorough design of a spectrum sensor is of highest priority. Here, a novel implementation of a spectrum sensing technique, using a generalized version of the Neyman Pearson test, is considered. This novel implementation overcomes the usual prerequisite of the known noise power. This(More)
We consider a multi-input-multi-output system employing space-time block codes (STBC). Different from conventional approaches, the proposed transmitter linearly combines data together with estimation of channel state information, so that no channel estimation is needed at the receiver side when phase-shift keying (PSK) modulation is employed. The employed(More)
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