| Title | Generalized Pascal Matrices and Inverses Using One-to-One Rational Polynomial s-z Transformations |
| Author | *Tian-Bo Deng (Toho University, Japan), Sorawat Chivapreecha, Kobchai Dejhan (King Mongkut's Institute of Technology Ladkrabang, Thailand) |
| Page | pp. 333 - 336 |
| Keyword | Generalized Pascal matrix, inverse Pascal matrix, filter |
| Abstract | This paper proposes a one-to-one mapping between the coefficients of continuous-time (s-domain) and discrete-time (z-domain) IIR transfer functions such that the s-domain numerator/denominator coefficients can be uniquely mapped to the z-domain numerator/denominator coefficients, and vice versa. The one-to-one mapping provides a firm basis for proving the inverses of the so-called generalized Pascal matrices from various first-order s-z transformations. |
| Title | Complex Multiplier Suited for FPGA Structure |
| Author | *Keiichi Satoh (Department of System and Information Engineering, Graduate School of Science and Engineering, Yamagata University, Japan), Jubee Tada, Kenta Yamaguchi, Yasutaka Tamura (Department of Informatics, Graduate School of Science and Engineering, Yamagata University, Japan) |
| Page | pp. 341 - 344 |
| Keyword | complex multiplication, FPGA structure, LUT, Carry-chain |
| Abstract | In this paper, we propose complex multiplier suited for FPGA structure to achieve higher performance and lower cost. The complex multiplier is based on LUT (Look-Up-Table) and carry-chain from FPGA structure, we utilize Booth algorithm for partial product generation and Wallace tree utilizing effectively LUTs and carry-chains in the FPGA structure for the partial products compression to design it. We design Wallace trees of various types utilizing LUTs and carry-chains, the complex multipliers implemented the trees are synthesized by synthesis tool. Consequently, the proposed complex multipliers are superior to one synthesized by operator ('*','+', and '-') from VHDL description for both the path delay and the scale. |
| Title | A Distance-Based Howling Canceller with Adaptive Bandwidth |
| Author | *Akira Sogami, Arata Kawamura, Youji Iiguni (Osaka University, Japan) |
| Page | pp. 345 - 348 |
| Keyword | Distance-based, Howling canceller, adaptive bandwidth, notch filter |
| Abstract | We have been researched a distance-based howling canceller. We however have a problem about quality degradation of the howling canceller output. In this paper, to solve this problem, we propose an adaptive bandwidth of the notch filter. The adaptive bandwidth narrows when the distance becomes long. We evaluate the speech quality of the howling canceller output with the adaptive bandwidth. We also evaluate its capability of the howling cancellation with the adaptive bandwidth in a practical environment. |
| Title | Current Sensor based Non-intrusive Appliance Recognition for Intelligent Outlet |
| Author | *Takeshi Saitoh, Yuuki Aota, Tomoyuki Osaki, Ryosuke Konishi, Kazunori Sugahara (Tottori University, Japan) |
| Page | pp. 349 - 352 |
| Keyword | intelligent outlet, non-intrusive appliance recognition, current sensor, current feature |
| Abstract | This paper presents the current sensor based non-intrusive appliance recognition method for intelligent outlet. Our system has two main functions; one is the remote control function of power supply through the Internet. The other is monitoring function observe the state of appliance. In this paper, the monitor function is especially focused. To recognize the state of appliance, we extract nine features based on measured current signal. In the experiment, we gathered a number of signals with various appliances, and found that three features I_{peak}, I_{avg}, and I_{rms} yield valid recognition results of 81.3%, 84.0%, and 87.4% for classifying the state of appliance into three categories. |