Optical Signal Processing and RF-Optical Receivers

In next-generation wireless communications, such as Beyond 5G and 6G, the use of frequency bands ranging from dozens to hundreds of GHz is under consideration. However, as wireless communication moves toward higher frequencies and wider bandwidths, achieving high-performance wireless receivers using conventional CMOS technology is becoming increasingly difficult. To address this challenge, I am conducting research on broadband and highly efficient wireless-optical receivers leveraging optical technologies. By utilizing Optical Signal Processing to process wireless signals in the optical domain, it is possible to reduce the power consumption of ADCs (Analog-to-Digital Converters) and DSPs (Digital Signal Processors), which are the primary sources of energy consumption in current CMOS wireless receivers.

Key words: RF-optical Receiver, Optical Signal Processing

Beyound 5Gや6Gなどの次世代無線通信では、数十~数百GHzの周波数帯を用いることが検討されていますが、CMOS技術では無線通信の高周波化・広帯域化に伴って高性能な無線受信機の実現が困難になりつつあります。 そこで、光技術を用いてこの問題を解決すべく、広帯域かつ高効率な無線光受信機の実現のための研究を行っています。 光領域で無線信号を処理する光信号処理（Optical Signal Processing）を用いることで、現在のCMOS無線受信機において電力消費の主要因となっているADC（Analog-to-Digital Converter）やDSP（Digital Signal Processor）の消費電力を削減することが可能になると考えられます。

キーワード： 無線光受信機, 光信号処理