OFDMシステムのための最適化SAW Chirp-Z変換

摘要

弾性表面波は、OFDM信号への変換および受信したOFDMの分波のためのフーリエ変換に電力消費で決定的な利点を持ち超高速の演算処理能力を有する。帯域幅100MHz、N＝2,048 のSAW Down ChirpFilterから構成されるSAW Chirp-Z変換プロセッサーの演算スピードは5.5G FLOPSになる。SAW Down Chirp Filterの遅延時間温度係数がゼロとなる条件を示し、適用例として正逆フーリエ変換機能を有する最適化SAW Chirp-Z変換を利用する5G Hz帯高速無線LAN用OFDMシステムを検討した。SAW Chirp-Z変換は、長寿命の携帯電話を実現できる唯一の方法である。%The surface acoustic wave has a definite advantage in the Fourier transform for amount of wave of OFDM that is converted into the OFDM signal and received in power consumption and has a super-high-speed operation processing performance. The operation speed of the SAW Chirp-Z transform processor composed of SAW Down Chirp Filter of bandwidth 100MHz and N=2,048 becomes 5.5GFLOPS. The condition that the temperature coefficient of the delay time of SAW Down Chirp Filter becomes zero was shown, and the OFDM system for 5GHz band high-speed wireless LAN that used optimization SAW Chirp-Z transform that had the positive reverse-Fourier transform function as an application example was examined. The SAW Chirp-Z transform is the only method by which a long-lived handset can be achieved.