signal fading造句
例句與造句
- Several key factors such as signal fading and multi - path effect are further analyzed and simulated . summarizes smart antenna algorithms for cdma mobile terminal
在總結(jié)應(yīng)用于cdma移動(dòng)終端的智能天線算法基礎(chǔ)上，提出一種利用接收信號(hào)與期望信號(hào)相關(guān)特性的新型智能天線算法。 - In wireless communication system , signal fading arising from multipath propagation is a particularly severe channel impairment that can be mitigated through the use of diversity
在移動(dòng)通信系統(tǒng)中,由于多徑傳播引起的衰落對(duì)信道產(chǎn)生的嚴(yán)重影響可以通過(guò)分集技術(shù)得到有效的解決。 - Polarization diversity and maximum ratio combining ( mrc ) is used to restrain the sharp signal fading in the telemetry systems , in which the object is in flight at a high speed and rotating and in low elevation
在信號(hào)極化衰弱現(xiàn)象嚴(yán)重的環(huán)境中對(duì)快速飛行目標(biāo)、低仰角運(yùn)動(dòng)目標(biāo)以及旋轉(zhuǎn)運(yùn)動(dòng)目標(biāo)等進(jìn)行遙測(cè)接收時(shí),極化分集最大比合成技術(shù)可以有效的改善接收性能。 - Even though most losses in wireless networks stem from factors like signal fading , interference , and link blackouts , tcp assumes the losses to be related to congestion , so it kicks in algorithms that slow down network traffic
盡管無(wú)線網(wǎng)絡(luò)中的大多數(shù)損耗來(lái)自信號(hào)衰退、干擾以及連接中斷等因素，但是tcp假定這些損耗與擁塞有關(guān)，因此它摒棄了降低網(wǎng)絡(luò)流量的算法。 - It is very difficult to design a high - quality underwater acoustic data transmission system . in our study , we use frequency diversity and frequency - hopped technology . this method is an effective solution for the isi and signal fading
該方法起到保證mfsk傳輸系統(tǒng)使用頻率中文摘要統(tǒng)使雨頻率分集技術(shù)能得以有效的實(shí)現(xiàn)；并可用于提高mfsk信號(hào)檢測(cè)精度，因此在頻率信號(hào)檢測(cè)中它有廣泛應(yīng)用意義，它是本文重要?jiǎng)?chuàng)新之處。 - It's difficult to find signal fading in a sentence. 用signal fading造句挺難的
- On the every different application environment , this system must adopt the effective , advanced and applied technology to reject signal fading caused by mai , mutipath and near - far effects , and also to solve the corresponding problem existented at the practice communication
在各種不同的應(yīng)用環(huán)境情況下，這個(gè)系統(tǒng)必須采用有效的、先進(jìn)的和實(shí)用的技術(shù)抑制由于多址、多徑及遠(yuǎn)近效應(yīng)引起的信號(hào)衰落，并且要不斷解決實(shí)際通信中存在的相應(yīng)難題。 - Then the signal fading problem of the sensor arising from environmental effects is presented and several solving methods are introduced . at last , we choose the closed loop controlling working point method to stabilize the sensor ’ s working point because of its ’ high sensitivity and simple structure
研究了外界環(huán)境變化引起的干涉儀輸出信號(hào)衰落問(wèn)題,在比較幾種常見(jiàn)的解決方案后,選用靈敏度高、結(jié)構(gòu)簡(jiǎn)單的閉環(huán)控制工作點(diǎn)算法來(lái)穩(wěn)定干涉儀的工作點(diǎn)。 - Lt is well anown that the multi ? ath effeet results in signal fading and intersymbol interference ( isd , wnich causes great difficulhes in pewces of transndssion in underwater acoushc cotnmnication . in this papef we used frequency diversity method to overcome the problem of signal fading , and used the frequency - hopping method to ebonate the isi caused by multi - path
水聲信道多途特性引起的信號(hào)衰落和碼間干擾是影響水下通信質(zhì)量的主要因素，采用頻率分集技術(shù)可以處理幅度衰落，而跳頻技術(shù)則可以簡(jiǎn)單、有效地抗多途引起的碼間干擾。 - 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信道的傳輸特性入手，針對(duì)多途徑效應(yīng)引起的幅度衰落及碼間干擾問(wèn)題，提出一種適用于水聲e - mail通信的十六進(jìn)制(或八進(jìn)制)數(shù)字頻移鍵控( mfsk )傳輸系統(tǒng)。 - It has been proven that the spread spectrum technologies have good capabilities of overcoming isi in electromagnetic wireless channel . the feasibilities of their applications to underwater acoustic channel have been analyzed , the frequency hopping technology is chosen . instead of using time - frequency diversity , convolutional coding and viterbi decoding are employed to combat signal fading , consequently the bit - rate and bit - error - rate performance of the underwater acoustic voice communication system can be balanced and controlled
由于擴(kuò)頻技術(shù)在抗碼間干擾方面具有優(yōu)良的特性，因此在分析了各種擴(kuò)頻技術(shù)于本研究應(yīng)用的可行性之后，確定了跳頻技術(shù)作為具體實(shí)現(xiàn)方案；在克服幅度衰落方面，選用卷積編碼和維特比譯碼方法來(lái)替代原有的分集技術(shù)以綜合調(diào)節(jié)系統(tǒng)的通信速率與誤碼性能，達(dá)到差錯(cuò)可控的目的。 - Because of the affection of noise and signal fading , in order to high data rate access and high quality , wireless communication need new technology to improve the link reliability and enhance the spectrum efficiency . mimo ( multiple input and multiple output ) can enhance the spectrum efficiency and increase channel capacity greatly , and reduce the multipath affection without spectrum band and power increasing . the 3th generation mobile communication wcdma is coming , with the purpose of putting mimo , stbc ( space time block coding ) , space diversity into practice of wcdma systems , in order to lay the foundation of 3g toward 4g , this dissertation has done some research under this background
在發(fā)射機(jī)和接收機(jī)使用多個(gè)天線進(jìn)行數(shù)據(jù)傳輸?shù)亩噍斎攵噍敵? mimo )技術(shù),可以在不增加帶寬和天線發(fā)送功率的條件下,成倍的提高頻譜利用率,提高系統(tǒng)的信道容量,還可以抗多徑干擾。第三代移動(dòng)通信wcdma即將到來(lái),為了將多天線技術(shù)( mimo ) ,空間分集技術(shù),空時(shí)編碼技術(shù)用到wcdma系統(tǒng)中去,為第三代移動(dòng)通信向第四代移動(dòng)通信系統(tǒng)平穩(wěn)過(guò)渡奠定一定的基礎(chǔ),需要做一些理論上的研究。 - With the characteristics of large ambient noise , very narrow bandwidth , low carrier frequency , great propagation latency and time - space - frequency variant multipath effect ( mpe ) , the stochastic ocean channel has demonstrated the greatest complexity and difficulty for underwater acoustic wireless communications . among them multipath effect ( mpe ) is the most difficult obstacle that results in signal fading and inter - symbol interference ( isi )
但是噪聲高、帶寬窄、載波頻率低、傳輸時(shí)延大、多途徑效應(yīng)隨時(shí)間?空間?頻率變化等信道特性都會(huì)給有效、可靠的水聲通信帶來(lái)很大的麻煩，其中多途徑效應(yīng)是最主要的困擾因素，它會(huì)導(dǎo)致信號(hào)幅度衰落和碼間干擾。