| 摘要 |
<P>PROBLEM TO BE SOLVED: To achieve SAW chirp-Z transform for an OFDM system which can be used for a mobile object communication field. Ž<P>SOLUTION: The OFDM system composed of a SAW chirp-Z transformer wherein electric circuits for generating chirp signals are connected before and after a SAW chirp filter having a down-chirp characteristic uses SAW chirp-Z transform in which the delay time of the SAW chirp filter has a zero temperature characteristic. This invention is the OFDM system using the SAW chirp-Z transform which is composed of a SAW dispersion type delay line wherein the delay time has the zero temperature characteristic to perform convolution by using a surface acoustic wave which can be applied to signal processing in the mobile object communication field, and the industrial value of the OFDM system is extremely high. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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