| Budget Amount *help |
¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2013: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
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| Outline of Final Research Achievements |
Orthogonal Frequency Division Multiplexing (OFDM) systems are sensitive to frequency offset because subcarriers in OFDM system overlap each other in frequency domain. Gabor Division Spread Spectrum System (GD/S3) proposed by the leader of this research project et al. is robust to a frequency offset. In order to avoid a two-dimensional search for a time delay an a Doppler frequency shift of the channel, we propose a Phase Updating Loop (PUL) method that alternately uses a time-division (TD) code receiver for delay estimation and a frequency-division (FD) code receiver for Doppler estimation. As applications of PUL method, we propose a multiple-target detection radar system and a method for realizing higher order MPSK demodulator employing code-division technique in spread spectrum systems.
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