トウ　リヨウ   Ryo TOH   陶　良    所属   千葉工業大学  工学部 電気電子工学科    千葉工業大学  工学研究科 工学専攻    千葉工業大学  工学研究科 電気電子工学専攻    職種   教授
言語種別	日本語
発行・発表の年月	2025/01/01
形態種別	学術雑誌
査読	査読あり
標題	水中無線通信におけるMIL-STD SOQPSK方式の有効性について
執筆形態	共著
掲載誌名	海洋音響学会誌
掲載区分	国内
出版社・発行元	海洋音響学会
巻・号・頁	52(1),1-10頁
担当区分	責任著者
著者・共著者	矢野由紀江、陶良
概要	Underwater wireless communication using ultrasound faces significant challenges due to narrower band channels and a lower transmission rate. Although higher-order QAM is predominantly used for wireless communication in air, QPSK, with its constant envelope, remains crucial for underwater communication. On the other hand, with its narrower modulation bandwidth, MIL-STD SOQPSK is expected to provide better band efficiency than QPSK. In this paper, we studied the effectiveness of MIL-STD SOQPSK using numerical simulations, comparing its BER performance with that of QPSK. We propose a detector for MIL-STD SOQPSK using 3-bit length matched filters and maximum likelihood estimation, assuming that the transmitting symbols are unknown and are independent and identically distributed. The results showe lower BERs for MIL-STD SOQPSK than for QPSK under the narrowband channel condition.