CAJ | 학술논문

　　为了改善脉冲位置调制需要符号同步和数字脉冲间隔调制、双头脉冲间隔调制、多幅度脉冲间隔调制符号长度不固定所引起的接收发机结构复杂和调制器速率不固定等问题，提出将定长数字脉冲间隔调制应用于水下无线光通信系统。分析了带宽需求、传输容量，并与其它调制方式进行了比较；在给出水下无线光通信信道模型的基础上，推导了该信道中定长数字脉冲间隔调制方式的误包率表达式。结果表明，定长数字脉冲间隔调制适用于水下无线光通信系统。
　　위료개선맥충위치조제수요부호동보화수자맥충간격조제、쌍두맥충간격조제、다폭도맥충간격조제부호장도불고정소인기적접수발궤결구복잡화조제기속솔불고정등문제，제출장정장수자맥충간격조제응용우수하무선광통신계통。분석료대관수구、전수용량，병여기타조제방식진행료비교；재급출수하무선광통신신도모형적기출상，추도료해신도중정장수자맥충간격조제방식적오포솔표체식。결과표명，정장수자맥충간격조제괄용우수하무선광통신계통。
In order to improve the complex structure of the receiver and the transmitter and the unfixed rate of the modulator while pulse position modulation ( PPM ) needed symbol synchronization and digital pulse interval modulation (DPIM), dual-header pulse interval modulation ( DHPIM), multilevel digital pulse interval modulation ( MDPIM) had unfixed symbol length , fixed-length digital pulse interval modulation ( FDPIM ) used in underwater wireless optical communication system was put forward .Bandwidth requirement and transmission capacity were analyzed , compared with on-off keying ( OOK ) , PPM, DPIM and MDPIM.Based on the model of underwater wireless optical communication channel, packet error rate (PER) of FDPIM for this channel was presented .The results show that FDPIM is suitable for underwater optical wireless communication system.