解放军理工大学学报（自然科学版）
解放軍理工大學學報（自然科學版）
해방군리공대학학보（자연과학판）
JOURNAL OF PLA UNIVERSITY OF SCIENCE AND TECHNOLOGY(NATURAL SCIENCE EDITION)
2015年
3期
203-208
,共6页
低密度校验%跳频%抗干扰
低密度校驗%跳頻%抗榦擾
저밀도교험%도빈%항간우
LDPC%frequency hopping%anti-jamming
为进一步提升跳频卫星通信系统的抗干扰能力,将 LDPC 信道编码与跳频技术相结合,建立一种基于 LDPC 码的跳频抗干扰通信系统模型,基于该模型进行了抗干扰性能仿真分析。首先结合 BPSK 调制方式,建立不同码率、不同码长的 LDPC 码跳频抗干扰通信系统模型；然后利用该模型,对不同码长、不同码率的 LDPC 码跳频抗干扰通信系统在不同干扰因子的部分频带干扰条件下进行抗干扰性能仿真,并对仿真结果进行对比分析。研究结果表明,LDPC 码跳频抗干扰通信系统模型的仿真结果与理论分析相吻合。通过仿真分析,得到采用不同的编码参数在不同干扰条件下抗干扰性能的量化结果与结论,为基于 LDPC 码的跳频抗干扰系统设计和自适应抗干扰措施制定提供了理论基础。
為進一步提升跳頻衛星通信繫統的抗榦擾能力,將 LDPC 信道編碼與跳頻技術相結閤,建立一種基于 LDPC 碼的跳頻抗榦擾通信繫統模型,基于該模型進行瞭抗榦擾性能倣真分析。首先結閤 BPSK 調製方式,建立不同碼率、不同碼長的 LDPC 碼跳頻抗榦擾通信繫統模型；然後利用該模型,對不同碼長、不同碼率的 LDPC 碼跳頻抗榦擾通信繫統在不同榦擾因子的部分頻帶榦擾條件下進行抗榦擾性能倣真,併對倣真結果進行對比分析。研究結果錶明,LDPC 碼跳頻抗榦擾通信繫統模型的倣真結果與理論分析相吻閤。通過倣真分析,得到採用不同的編碼參數在不同榦擾條件下抗榦擾性能的量化結果與結論,為基于 LDPC 碼的跳頻抗榦擾繫統設計和自適應抗榦擾措施製定提供瞭理論基礎。
위진일보제승도빈위성통신계통적항간우능력,장 LDPC 신도편마여도빈기술상결합,건립일충기우 LDPC 마적도빈항간우통신계통모형,기우해모형진행료항간우성능방진분석。수선결합 BPSK 조제방식,건립불동마솔、불동마장적 LDPC 마도빈항간우통신계통모형；연후이용해모형,대불동마장、불동마솔적 LDPC 마도빈항간우통신계통재불동간우인자적부분빈대간우조건하진행항간우성능방진,병대방진결과진행대비분석。연구결과표명,LDPC 마도빈항간우통신계통모형적방진결과여이론분석상문합。통과방진분석,득도채용불동적편마삼수재불동간우조건하항간우성능적양화결과여결론,위기우 LDPC 마적도빈항간우계통설계화자괄응항간우조시제정제공료이론기출。
To further enhance the anti-jamming capability of the FH(frequency hopping)satellite communi-cation system,combining FH system with channel coding,a low-density parity-check(LDPC)coded FH anti-jamming communication system was established in this paper,and the simulation of the anti-jamming performance was carried out.In the first place,an LDPC coded SFH/BPSK(slow frequency hopping/bina-ry phase shift-keying)anti-jamming communication system was built,whose code lengths and code rates were different.Then,the anti-jamming capability against partial-band jamming (PBJ)with different par-tial-band jamming factors of the system was simulated and compared.All these prove that the performance of the LDPC coded SFH/BPSK anti-jamming system simulation model is available,which is in conformity with the theoretical analysis.Through simulation and analysis,the quantitative results of the anti-jamming performance were obtained based on different coding parameter under different jamming conditions.As a consequence,the results will provide technical basis for the design of LDPC coded FH anti-jamming sys-tem and the adaptive anti-jamming measures.
