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This paper discusses the problem of planning well conditioned trajectories for learning a class of nonlinear models such as the imaging model of a camera and the multibody dynamic model of a robot. In such model learning problems, the model parameters can be linearly decoupled from system variables in the feature space. The learning accuracy and robustness against measurement noise and unmodeled response...
In order to improve the noise immunity performance of blind watermark algorithm of dual-tree complex wavelet transform (DT - CWT), an improved measure is proposed and is applied to the art of video, learning from complete complementary codes used in spread spectrum communication. The algorithm utilizes Hadamard matrix to create the complete complementary codes and utilizes a secret key to expand the...
Short-range wireless communication technologies have been used in many security-sensitive smartphone applications and services such as contactless micro payment and device pairing. Typically, the data confidentiality of the existing short-range communication systems relies on so-called “key-exchange then encryption” mechanism, which is inefficient, especially for short communication sessions. In this...
A harmonic noise frequency filtering (HNFF) LC voltage-controlled oscillator (VCO) is fabricated using asymmetric inductance tank (AIT) in InGaP/GaAs heterojunction bipolar transistor (HBT) monolithic microwave integrated circuit (MMIC) technology. In order to optimize phase noise, the AIT and HNFF techniques are presented. The proposed VCO exhibited the phase noise of −117.3 dBc/Hz and −129.96 dBc/Hz...
Reliable spectrum sensing in low signal-to-noise ratio (SNR) condition is one of the major technical challenges in cognitive radio network. In this paper, we propose a robust spectrum sensing algorithm for unsynchronized low SNR OFDM signal by mitigating the impacts of time and frequency offsets with multiple processing time window and sliding frequency correlator, respectively. In addition, considering...
Spectrum sensing is one of the fundamental enabling technologies for cognitive radio (CR) communications. Motivated by the infeasibility of using noise variance dependent signal sensing threshold for CR users, a robust spectrum sensing scheme using a proposed noise parameter cancelation (NPC) method for orthogonal frequency division multiplexing (OFDM) signals is investigated in this paper. Identification...
Although power line communication (PLC) is not a new technology, its use to support communication with low rate, low- voltage requirements are still the focus of ongoing research. In access domain PLC (abbreviated as AD-PLC), its applications including state control, home automation systems, lighting control, air-conditioning control, low speed communication networks, automatic meter reading, advertising...
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