| Project/Area Number |
04452186
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
電子通信系統工学
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| Research Institution | Toho University |
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Principal Investigator |
SATO Yoichi Toho University, Faculty of Science, Professor, 理学部, 教授 (20147581)
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| Co-Investigator(Kenkyū-buntansha) |
FURUKAWA Toshihiro Fukuoka Institute of Technology, Faculty of Engineering, Associate Professor, 工学部, 助教授 (00190140)
ODA Hiroyoshi Toho University, Faculty of Science, Lecturer, 理学部, 講師 (80175265)
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| Project Period (FY) |
1992 – 1994
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| Project Status |
Completed (Fiscal Year 1994)
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| Budget Amount *help |
¥7,800,000 (Direct Cost: ¥7,800,000)
Fiscal Year 1994: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1993: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1992: ¥6,300,000 (Direct Cost: ¥6,300,000)
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| Keywords | Blind Equalizer / Blind Identification / Viterbi Algorithm / Mobile Communication |
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| Research Abstract |
1. The Progress of Research
(1) Blind Identification and Equalization in the Case That the Transmitted Signal Depends on the Continuous Distribution
The high speed convergence was achieved in the on-line blind equalization algorithm under the control of the cost function referring to the distribution of the equalization output [6]. The blind equalization for the complex signal and that based on the time-independency principle were also developed [5], [3]. The on-line blind system idebNification has been shown to be realized under the application of the adaptive Viterbi algorithm by using the quantized input signal candidates even in the case that the true input signal depends on the continuous distribution. In this case, by increasing the quantization level of candidates on the way of executing the algorithm, the reduction of computational quantity, the high speed convergence and the precise estimation were obtained [8]. The blind identification method accompanied with the estimation of
… More
unmber of parameters using the Viterbi algorithm was also proposed [9].
(2) Blind Sequence Estimation in the Case That the Transmitted Signal Depends on the Descrete Distribution
Recently, we proposed the blind Viterbi algorithm as the receiving method with the high performance in the digital mobile communication. This time, we presented the survey paper which is written in detail about (1) and (2) [1]. It is known that the problem of the singularity happens when the special sequential symbols are transmitted. We proved that the proposed algorithm detectes the unique sequence only by the condition concerned with the rank [4]. The paper of the evaluation research on this method in the practical environment, such that the noise effect is taken into account, is now prepared.
As the problem related to (1) and (2), we proposed a blind synchronous demodulation approach for multi-level digital QAM signal [2].
2.The Environment on Computer and Simulation
We evaluated the convergence properties of many algorithms for the blind system analysis and constructed an integrated simulation system. We need many simulation experiments for our research. We wish to show our acknowledgments because the work stations which was bought by the grant-in-aid from the Ministry of Education have exhibited very effective power for these simulations and the progress of our research. Less
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