CAJ | 학술논문

针对空地数据链高效可靠的传输要求，本文研究了空地数据链自适应编码调制方法。该方法基于码率可变的Turbo码，传输信道模型解算与加栽，最大似然信道估计，自适应判决门限的确定等技术，在微波暗室环境内模拟了空地数据链的通信。仿真结果表明：在误码率为10^-5时，自适应编码调制方法能够根据信道状况自适应调整编码与调制模式，较大程度上提高信息传输速率，满足了空地数据链高效可靠的传输要求。
침대공지수거련고효가고적전수요구，본문연구료공지수거련자괄응편마조제방법。해방법기우마솔가변적Turbo마，전수신도모형해산여가재，최대사연신도고계，자괄응판결문한적학정등기술，재미파암실배경내모의료공지수거련적통신。방진결과표명：재오마솔위10^-5시，자괄응편마조제방법능구근거신도상황자괄응조정편마여조제모식，교대정도상제고신식전수속솔，만족료공지수거련고효가고적전수요구。
In order to meet the high reliability and optimum throughput requirements of air-to-ground （ AG ） data links, this paper proposes an adaptive coding and modulation technique. The proposed method is based on a number of techniques, including variable rate Turbo codes, transmission channel model loading, maximum likelihood channel estimation, and adaptive decision threshold adjustment in accordance with the channel estimation. The AG data link transmission is simulated in an anechoic chamber. The simulation results show that it improves data link bit-error-ratio, therefore significantly improves the efficiency of information transmission, complying with the high reliability and optimum throughput transmission requirements for the data link.