无线电工程
無線電工程
무선전공정
RADIO ENGINEERING OF CHINA
2014年
12期
1-3
,共3页
Turbo码%码率%自适应调制编码%混合差错重传
Turbo碼%碼率%自適應調製編碼%混閤差錯重傳
Turbo마%마솔%자괄응조제편마%혼합차착중전
Turbo code%code rate%adaptive modulation & coding%HARQ
针对极低信噪比条件下的传输，研究了极低码率Turbo码的编译码器结构，仿真分析了其性能。提出了极低码率Turbo码在高带宽容量、复杂信道环境，例如：短波通信、流星余迹通信等系统中的使用方法。比较了极低码率Turbo码与高码率Turbo码加扩频的性能。研究表明，极低码率Turbo码较传统高码率Turbo码有更好的性能，能将自适应调制编码技术向低信噪比环境扩展。
針對極低信譟比條件下的傳輸，研究瞭極低碼率Turbo碼的編譯碼器結構，倣真分析瞭其性能。提齣瞭極低碼率Turbo碼在高帶寬容量、複雜信道環境，例如：短波通信、流星餘跡通信等繫統中的使用方法。比較瞭極低碼率Turbo碼與高碼率Turbo碼加擴頻的性能。研究錶明，極低碼率Turbo碼較傳統高碼率Turbo碼有更好的性能，能將自適應調製編碼技術嚮低信譟比環境擴展。
침대겁저신조비조건하적전수，연구료겁저마솔Turbo마적편역마기결구，방진분석료기성능。제출료겁저마솔Turbo마재고대관용량、복잡신도배경，례여：단파통신、류성여적통신등계통중적사용방법。비교료겁저마솔Turbo마여고마솔Turbo마가확빈적성능。연구표명，겁저마솔Turbo마교전통고마솔Turbo마유경호적성능，능장자괄응조제편마기술향저신조비배경확전。
For the purpose of transmission with very low signal to noise ratios,the structure of the encoder of a low rate turbo code is presented in this paper.The corresponding decoding algorithm is analyzed,and the performance of this coding scheme is obtained by simulations.This paper presents the application method of low rate Turbo code in shortwave communications or meteor burst communica?tions systems is proposed in high bandwidth and complex channel environment. Comparisons are conducted between the application of low rate turbo code and the concatenating scheme of high rate turbo code and spectrum spread technique.The study proves that low rate Turbo code has better performance than traditional ones.With low rate turbo code,the application of adaptive modulation and coding technique can be extended to low signal to noise scenarios.
