电子科技
電子科技
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IT AGE
2012年
12期
110-112
,共3页
中继%LDPC码%HARQ%平均误码率%吞吐量%平均时延
中繼%LDPC碼%HARQ%平均誤碼率%吞吐量%平均時延
중계%LDPC마%HARQ%평균오마솔%탄토량%평균시연
relay node%LDPC codes%Hybrid-ARQ%the average of bit error rate%throughput%the average ofdelay
根据不同中继节点建立的通信信道衰落特性的不同,利用中继节点可增强无线信道空间分集,提高整个链路的传输性能。纠错码的使用可更有效地提高信道传输效率的特点。文中介绍了基于LDPC码的多中继HARQ系统模型,在不降低传输速率的条件下,可更高效地传输数据。利用Matlab仿真了不同中继个数对系统平均误码率、吞吐量以及平均时延产生的不同影响,仿真结果表明,采用该系统模型可降低系统的平均误码率和平均时延,提高了系统的吞吐量。同时在码长较长的情况下,采用LDPC码的多中继HARQ系统性能优于采用Turbo码的多中继HARQ系统性能。
根據不同中繼節點建立的通信信道衰落特性的不同,利用中繼節點可增彊無線信道空間分集,提高整箇鏈路的傳輸性能。糾錯碼的使用可更有效地提高信道傳輸效率的特點。文中介紹瞭基于LDPC碼的多中繼HARQ繫統模型,在不降低傳輸速率的條件下,可更高效地傳輸數據。利用Matlab倣真瞭不同中繼箇數對繫統平均誤碼率、吞吐量以及平均時延產生的不同影響,倣真結果錶明,採用該繫統模型可降低繫統的平均誤碼率和平均時延,提高瞭繫統的吞吐量。同時在碼長較長的情況下,採用LDPC碼的多中繼HARQ繫統性能優于採用Turbo碼的多中繼HARQ繫統性能。
근거불동중계절점건립적통신신도쇠락특성적불동,이용중계절점가증강무선신도공간분집,제고정개련로적전수성능。규착마적사용가경유효지제고신도전수효솔적특점。문중개소료기우LDPC마적다중계HARQ계통모형,재불강저전수속솔적조건하,가경고효지전수수거。이용Matlab방진료불동중계개수대계통평균오마솔、탄토량이급평균시연산생적불동영향,방진결과표명,채용해계통모형가강저계통적평균오마솔화평균시연,제고료계통적탄토량。동시재마장교장적정황하,채용LDPC마적다중계HARQ계통성능우우채용Turbo마적다중계HARQ계통성능。
Different relay nodes have different fading characteristics in establishing the communication channel, and the relay node can improve the wireless channel spatial diversity and the transmission performance of the entire link. The use of error-correction can improve transmission efficiency of the channel. The article introduces the multi-relays hybrid-ARQ system based on LDPC codes, which can transfer data more efficiently without reducing the transmission rate. Different number of relay nodes have different effect on the average of bit error rate, throughput and the average of delay of the system. Matlab simulation show that the system model can decrease the average of bit error rate and delay and improve throughput of the system. At the same time, the multi-relays cooperative Hybrid- ARQ system based on LDPC Codes is better than that of Turbo codes in dealing with long codes.