頻移鍵 的英文怎麼說
中文拼音 [bīnyíjiàn]
頻移鍵
英文
frequency shift key-
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,討論了幾種採用典型調制技術的短波數傳系統(如時頻調制、多進制頻移鍵控慢跳頻、 chess系統)原理、優缺點以及抗衰落和抗符號間干擾的性能;分析了自適應串列數傳系統抗短波通道衰落和多徑干擾的原理、關鍵技術;在本文的最後引入一種有望解決短波數傳系統低效率狀況的調制方式bcm -分組編碼調制,給出了一個採用bcm技術與自適應均衡技術相結合的短波數傳系統方案,並通過計算機模擬進行了初部驗證。Chaos of fsk frequency - hopped communication system
跳頻頻移鍵控通信系統中的混沌Fsk distribution automation using distribution line carrier systems - part 5 - 2 : lower layer profiles - frequency shift keying profile
使用配電線路載供系統的自動配電.第5 - 2部分:低層分布圖.頻移鍵控This dissertation, basing on simulation, makes a deep research on simulating signal of gmsk ( gaussian filtered minimun frequency shift keying ) baseband modulation and demodulation in ais ( automatic identification system ) equipment. the technology related in the following makes the modulation and demodulation of baseband signal into realization by ti dsp, at the same time, provides a key technique to develop ais system inland
本文著重對自動識別系統( ais - automaticidentificationsystem )設備的高斯濾波最小頻移鍵控( gmsk - gaussianfilteredminimunfrequencyshiftkeying )基帶調制解調信號進行了模擬研究,並在模擬的基礎上,在ti的dsp上實現了基帶信號的調制解調,為國內研製ais系統儲備了關鍵技術。In the future, we will increase the number of the frequency - hopped sub - bands. it will solve the inter - symbol interference ( isi ) perfectly. then the system will be used on the test out of labs
后續的工作只要把十六進制改為八進制(此工作不難)的數字頻移鍵控傳輸系統,藉以提高跳頻的子帶數目,即增加跳頻點,可期適于海上的應用。Fsk frequency shift keying
頻移鍵控法This thesis studied and introduced the method of msk modulation. it is a special type of constant envelope - continuous phase fsk
本文研究並介紹了msk調制方式,它是包絡恆定相位連續的頻移鍵控的一種特殊情況。Abstract : the performances and characteristiss of the zero crossing digital demodulation is ana lysed through the comparison of various ways of fsk signal digital demodulation. and ideal conclusion is reached
文摘:對各種頻移鍵控信號的數字解調方法進行了研究和比較,並重點分析了零交點數字解調法的性能特徵,最後得出了一個最佳結論Fsk / psk radar signal is the signal with both fsk and psk modulation at one time. it is with large bandwidth time product ( bt ), thumbtack - like ambiguity function and well ability of anti - emi. the fsk / psk signals of which the frequency - hopping and bi - phase sequences were randomly chosen often have high sidelobe level
Fsk / psk信號是同時進行頻移鍵控( fsk )和相移鍵控( psk )調制的信號,該信號具有大時帶寬積( bt )和高分辨特性,並具有「圖釘型」模糊圖結構、低截獲概率( lpi )特性和較好的抗干擾能力,受到了廣泛的重視。Continuous phase frequency shift keying cp - fsk
連續相位頻移鍵控Guassian minimum shift keying gmsk
高斯最小頻移鍵控Afsk for audio frequency - shift keying
音頻頻移鍵控This paper puts forward the signals transmission method combining the msk technique with the radio technique of frequency modulated ultra - short waves
文章提出了採用最小頻移鍵控( msk )技術與調頻超短波無線電技術相結合傳輸信號的方法。The fsk is used in the modulation for audio signals and the data signals. and the fdm is used to merge three lines signals
頻移鍵控用於音頻和數據信號的調制,三路信號的混合採用了頻分復用技術。So the acoustic wave is the only practical solution in this channel. an underwater acoustic channel is characterized as a multi - path channel due to signal reflections from the surface and the bottom of the sea. because of wave motion, the signal multi - path components undergo time - varying propagation delays that result in signal fading and inter - symbol interference ( isi )
本文從分析淺海水聲通道的傳輸特性入手,針對多途徑效應引起的幅度衰落及碼間干擾問題,提出一種適用於水聲e - mail通信的十六進制(或八進制)數字頻移鍵控( mfsk )傳輸系統。A frequency shift keyed modem for use on the public switched telephone network
公共交換電話網上使用的頻移鍵控數據機Guassian minimum shift keying
高斯最小頻移鍵控Long - range underwater acoustic information transmission through mfsk modulation
基於多進制頻移鍵控調制的水聲遠程信息傳輸技術研究Minimum shift keying msk
最小頻移鍵控Fsk for frequency - shift keying
頻移鍵控分享友人