interference n. 1.沖突,抵觸。 2.干涉,干預。 3.妨礙,打擾,阻礙物。 4.【物理學】干擾;干涉。 linguistic interference本族語對外語學習的干擾。 stop interference from outside 制止外來干涉。 run interference for (橄欖球賽中)保護(帶球者)以防對方搶球。
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This thesis analyzed the error performance of mfsk and mpsk modulator in hf with optimal receiver , studied the shortcoming and strongpoint of several typical short - wave data transmission systems and their performance over fading and intersymbol interference channels . the theory and key technical of adaptive modem is discussed . in the last , an efficient modulation scheme - block coded modulation is introduced into hf radio systems to improve the efficiency of hf data transmission , this paper also proposes a hf data transmission system scheme composed of a block coded modulator and a decision feedback type adaptive equalizer 本文在對短波數(shù)傳兩種常見調制方式fsk及psk最佳解調性能分析的基礎上,討論了幾種采用典型調制技術的短波數(shù)傳系統(tǒng)(如時頻調制、多進制頻移鍵控慢跳頻、 chess系統(tǒng))原理、優(yōu)缺點以及抗衰落和抗符號間干擾的性能;分析了自適應串行數(shù)傳系統(tǒng)抗短波信道衰落和多徑干擾的原理、關鍵技術;在本文的最后引入一種有望解決短波數(shù)傳系統(tǒng)低效率狀況的調制方式bcm -分組編碼調制,給出了一個采用bcm技術與自適應均衡技術相結合的短波數(shù)傳系統(tǒng)方案,并通過計算機模擬進行了初部驗證。
The thesis analyse the dynamic characteristic of heat - exchange equipment from the regulation channels and interference channels by the way of system simulation , and confirm the law of dynamic response of the second average temperaure when the first flow ( or temperature ) or the second flow change , and finish the design of heat power station ' s energy regulation system hereby it . at last , it simulate heat - exchang equipment and heat power station ' s energy regulation system by using matlab / simulink 本文用系統(tǒng)辨識的方法分別從調節(jié)通道、干擾通道對換熱器動態(tài)特性進行了分析,確定了當一次側流量(或溫度)或二次側流量變化時,換熱器二次側供回水平均溫度的動態(tài)響應規(guī)律,并據(jù)此建立了換熱器數(shù)學模型組成了熱力站能量控制系統(tǒng)。最后用maflab / simulink對換熱器和熱力站能量控制系統(tǒng)進行了動態(tài)仿真。