通信質量 的英文怎麼說
中文拼音 [tōngxìnzhíliáng]
通信質量
英文
communication quality-
The ionosphere is a complex medium, which is aeolotropy, asymmetry, dispersive and changes randomly with time. in order to improve the communication quality of the shortwave that depends on the ionosphere, we should have aknowledge of the current condition of the ionosphere in real time. the backscatter sounding of high frequency can diagnose the real - time channel characters for shortwave communication or hf radar, which is great assistant to shortwave communication and hf radar
電離層是隨機時變，各向異性，非均勻、色散的復雜介質。為了保證依賴于電離層進行的短波通信質量，必須了解電離層的實時狀態信息。高頻返回散射探測可以實時監測與短波通信或高頻天波雷達相關的天波傳播通道的狀態，對短波通信和天波雷達工作起了重要的輔助作用。Traditional power line carrier communication has some shortcomings on communication quality, which let it does n ' t adapt to the dement of the power developing
電力線載波通信以電力線為載體，與其它通信方式比較有著特殊的優勢。傳統的電力線載波通信在通信質量上的缺陷使其不能適應電力發展對通信的要求。Whether intended or not, any kind of interference may lower the quality of service, sometimes even interrupt the communication, and thus, it will bring serious trouble to the satcom users as well as the satellite operators
任何有意無意的星上載波干擾都可能降低通信質量，甚至造成通信中斷，給用戶和衛星操作者造成很大的麻煩。So acoustic echo cancellation ( aec ) technique has become a hotspot of competition in famous communicaton company all over the world. however, it is not always easy to implement acoustic equipments for communication system with satisfactory speech quality
回波消除技術能有效地解決長距離電話網路、 ip電話、免提電話和視頻會議等通信系統中的回波問題，很好地改善了語音通信質量，具有廣闊的市場前景。According to the principle of spread spectrum communication, the anti - interference performance of the technology is discussed and the composition of power line spread spectrum communication is described. based on the spread spectrum technique, a method which is low cost, high communications quality and low bit error for power line carrier communication using single - chip software programming is proposed
利用擴頻通信原理，分析擴頻通信的抗干擾特性，在此基礎上，闡述了電力線載波通信系統的基本結構，提出了一種利用軟體編程實現電力線載波擴頻通信的方法。該方法不增加硬體成本，即能達到提高通信質量、降低誤碼率的目的。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
水聲通道多途特性引起的信號衰落和碼間干擾是影響水下通信質量的主要因素，採用頻率分集技術可以處理幅度衰落，而跳頻技術則可以簡單、有效地抗多途引起的碼間干擾。The satellite - telecommunication has a serial of characteristic such as long distance, large coverage area, wide communication band, big transmission capacity, high quality, it has made a rapid progress in the last decades and become one of the most powerful communication methods today
而衛星通信具有通信距離遠、費用與通信距離無關、覆蓋面積大、不受地理條件限制、通信頻帶寬、傳輸容量大、適于多種業務傳輸、可進行多址通信、通信質量高等一系列特點，幾十年來獲得了迅速的發展，成為現代強有力的通信手段之一。The key technique of telemetry digital diversity receiver is diversity technique, which combines independent multi - path signal or extremely irrelevant multi - path signal at less, and improves instant snr and average snr in receiver and enhances communication quality. there are many irrelevant multi - path signal in wireless
遙測數字分集接收機一個重要關鍵是分集技術，分集技術是對獨立的或至少是高度不相關的多徑信號進行相加，從而改善接收端信號的瞬時信噪比和平均信噪比，提高通信質量。In modern communication system, the inter - symbol interference ( isi ) caused by non - ideal character of channel is the main factor which affect communication quality
現代通信系統中，由於通道的非理想特性而引起的碼間干擾（ isi ）是影響通信質量的一個主要因素。Application of rtce in adaptive hf maritime communication system, can improve quality of communication and enhance link rate of communication
海上高頻自適應通信系統中實時選頻技術的應用可以改善海上短波通信的通信質量和提高通信可通率。Based on those studies, a prototype of noise in speech reducing device for wireless communication is designed and implemented, with its effects evaluated
因此，研究無線語音降噪技術與語音增強演算法、研製無線語音降噪設備對于提高無線語音通信質量有著重要意義。That is, in order to obtain a satisfied communication quality, in every group of beforehand setting channel, by means of link quality analysis ( lqa ) during two side ' s calling, answering and recognizing period, every channel will be arranged in prior order, the best communication channel can be found automatically, and the link can be set in the best frequency so as to raise the level anti - interference, and ensure our army ' s ability in fighting
即為了獲得滿意的通信質量，在預置的各組頻道中，通過雙方的呼叫、應答和確認過程，利用鏈路質量分析（ lqa ） ，自動對電臺所預置的若干個頻率進行線路質量分析，將各頻道按優先排隊，從而自動找出當時最佳通信頻道，並在最佳頻率上建立鏈路，提高抗干擾能力，保障我軍的指揮作戰能力。It is introduced in detail in this thesis, too. thirdly, on the basis of analyzing the capability requirement of g. 723. 1 ’ s real time realization, various methods are used to optimize the original code. finally, g. 723. 1 speech coding and decoding are realized on tms320vc5501 dsp in real time
接著設計了整個系統的軟體結構，然後在分析g . 723 . 1標準實時實現的性能指標的基礎上，對標準給出的演算法進行了多方面的優化，最終在tms320vc5501dsp上實時實現了該標準，話音質量良好，達到了通信質量的要求。As a kind of channel encoding scheme in 3g mobile communication system, turbo codes influences the property of system, so increasing the performance of turbo codes can improve the communication quality of system
Turbo碼作為第三代移動通信系統的一種通道編碼方案，嚴重影響著系統的誤碼特性，而提高turbo碼的糾錯性能可以改善系統的通信質量。Those communication methods used have advantages and disadvantages in those aspects, such as communication quality, adaptation condition, covering scope, geography environment, construction and working cost, real time quality, etc. in order to make the transport of hydrological information better, this dissertation introduced gsm communication methods in the hydrology telemetric system, using gprs cell - phone, by those mobile communication methods, such as gsm sms, gprs sms, gprs data service, circuit data service, tone channel, etc. this dissertation summarized the constitute of hydrology telemetric system, mobile communication methods, and compared them with those traditional methods
現有的水情遙測通信方式有多種類型，它們在通信質量、適應條件、覆蓋范圍、地理環境、建設成本及運行費用、實時性等方面各有優缺點。為了更好地進行水情信息傳輸，本文提出一種基於gsm通信方式的水情遙測系統，通過使用gprs蜂窩電話，採用gsm短消息、 gprs短消息、 gprs數據業務、電路型數據業務和語音通道等多種移動通信方式，為水情數據的傳輸提供了新的解決途徑。In mobile communication and high - speed wireless digital communication, multi - path, the finity of channel bandwidth and faultiness of the channel, lead to the bringing of intersymbol interference ( isi ) when data transfer. this is an important factor that degrades the performance of communication. however channel equalization technique can eliminate the isi and noise, it can also reduces the bit error ratio
在移動通信及高速無線數據通信中，多徑效應和通道帶寬的有限性以及通道特性的不完善性導致數據傳輸時不可避免地產生碼間干擾（ isi ） ，成為影響通信質量的重要因素，而通道的均衡技術可以消除碼間干擾和噪聲，並減少誤碼率。With the increasing development of telecommunication network and telecommunication service requests, the condition of the signaling no. 7 network will play a more and more important role in the quality of the whole telecommunication network
隨著電信網路規模不斷擴大、電信業務的增加，七號信令網路的暢通與否直接關繫到整個電信網的通信質量。Be based upon the studies of sea optical scatter channel by use of monte carlo simulation, the channel is described as a multipath routeway in this paper. the effect on the communications performance, created by the frequency selectivity decline caused by the multipath routeway, is worked over. the correlation bandwith of sea optical scatter channel is analyzed and quantified through the simulation on the computer
基於對海水通道的蒙特卡羅模擬，本文對海水通道進行了多徑化描述，研究了由於通道的多徑化所產生的頻率選擇性衰落對通信質量的影響，分析並通過計算機模擬確定了海水通道的相關帶寬。Many research institutes around the world are focusing on and developing wi speech coding algorithm, expecting to give a communication quality of synthesized speech at 2kb / s or even below
目前國際上許多研究機構正在集中研究和開發該演算法，期望在2kb / s或更低速率產生通信質量的重建語音。It ' s impossible to avoid all interference in the communication system. especially the narrowband interference, which generates much higher power density than the wideband interference does, has a great influence on the quality of the communication, even it can hinder the normal communication
干擾不可避免地存在於通信系統中，尤其是窄帶干擾，它產生的功率密度比寬帶干擾產生的功率密度高得多，它們對通信質量的好壞，甚至能否進行正常的通信有著極大的影響。分享友人