基于Simulin 的短波電臺(tái)的設(shè)計(jì)仿真

短波通信是遠(yuǎn)距離信息傳輸?shù)闹匾侄?，短波高速?shù)據(jù)傳輸是數(shù)字通信領(lǐng)域的重要研究課題。本文主要從編碼和調(diào)制方面入手，針對(duì)短波信道的一些問題，將Turbo 碼和正交頻分復(fù)用技術(shù)應(yīng)用于短波電臺(tái)的設(shè)計(jì)中，同時(shí)，利用導(dǎo)頻輔助的方法對(duì)信道進(jìn)行估計(jì)，進(jìn)行信道補(bǔ)償，克服了短波信道的多徑衰落和多普勒頻移等因素的影響，有效地降低了系統(tǒng)的誤碼率，提高了整個(gè)系統(tǒng)的性能。最后在simulink 中完成了系統(tǒng)模型的設(shè)計(jì)和仿真。
關(guān)鍵詞：正交頻分復(fù)用，短波電臺(tái)，信道估計(jì)

Design and Simulation of Shortwave Radio Based On Simulink Zhang Yan Li ShuQing (Department of Physics，Jining Techers’ College, Jining，Shandong，273155，China) Abstract：Shortwave communication has been one of the most important method of long distance communication. And the high speed data transmission by shortwave has also been a great topic for research in the field of Digital Communications. This paper focuses on some technical difficulties encountered in shortwave channel and tackles the task by applying Turbo code and OFDM (Orthogonal Frequency Division Multiplexing) techniques in the shortwave radio. At the same time, the pilot-assisted method has been used to estimate the channel and compensate the signal. This hence improves the overall system performance by overcoming the effects like mufti-path fading and Doppler spread and reduces the Bit Error Rate(BER) effectively. At last, the design of the system model and simulation are done based on simulink.
Key words：OFDM；Shortwave Radio；Channel Estimation