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radio channel 無線電頻道[波道],射電波道。

radio city

The main contents of this dissertation are expressed as follows : in the first chapter , we introduced the background and the significance of the research in this dissertation as well as the state - of - the - art in mimo radio channel modeling . some concentrated problems and fundamental questions were also pointed out 本文的主要內容概括如下:在緒論中,簡述了本文的研究背景和意義,總結了mimo無線信道建模的研究現狀,指出了還存在的問題,指明了本文的研究動機和出發點。

The paper provides a visual modeling scheme using object - oriented technology , and does experiments for current impulse response models from model change to parameter design to graphical modeling . the frame is a visual solve for simulation analysis and transmission forecast of radio channels . on the one hand , the paper takes classic radio channels as independent objects and builds their graphical models , comes into being a visual universal model library 本文深入研究了無線通信信道、尤其是多徑信道的傳輸特性,提出一種基于面向對象的可視化無線信道建模和仿真方案,對具有普適性的信道沖激響應模型進行了從模型轉換、參數設計到圖形建模等環節的實驗,建立起統一的、一體化的信道建模仿真實驗框架,為無線移動信道的分析、建模、仿真和傳播預測提供了一種可視化的解決方案。

Amr ( adaptive multi - rate ) speech codec is adopted as the speech coding standard in the 3g system . it provides a multitude of different rates according to the local radio channel and traffic conditions , and it can select the optimal channel and codec mode to deliver the best combination of speech quality and system capacity 第三代移動通信采用amr ( adaptivemulti - rate )聲碼器作為其語音編碼標準,它支持多種不同的速率,可以根據本地無線信道和業務量的狀況來選擇最佳的信道模型和編碼模式,從而使語音質量和系統容量得到最佳的配置。

Unlike prior years , the news about master s new year s gift distributions to the poor and needy aulac families was announced repeatedly on the aulac radio channel almost every sunday leading up to the new year s celebration . this good news also was carried in two local aulac magazines , which helped to inform most of the aulac community in montreal 今年尤其特別的是悠樂電臺在活動前幾乎每個星期日都反覆播出師父將于新年發送新年禮物給需要幫助的貧困悠樂家庭的這個好消息,而且在兩大當地悠樂雜志的協助下,此一消息傳遍了蒙特利爾的悠樂社區。

The simulcast or quasi - synchronous mode technique has been applied to the transit system s radio communications in order to ensure efficient use of the radio channels , and to adjust frequencies , phases , and delay times for better performance . however , in some overlapping areas , interference is still impossible to prevent 4 .捷運為了頻道更有效之運用,以同頻共播方式規設,調整頻率、相位及時差,然而重疊區有些地方仍然無法有效避免干擾。

Based on such reasons , in this dissertation , some research on mimo radio channel modeling was done , and we proposed a stochastic mimo channel model which could serve as a generalized mimo radio channel model in mimo technology research 基于上述原因,本文研究了現有應用環境下mimo無線通信系統的信道建模理論與方法,綜合了一個寬帶統計mimo無線信道模型,可以作為研究mimo無線通信系統的一個通用空時信道模型。

Taking many uncertain factors in radio channel into account , the conflict is even more pungent while ofdm translate the high demand in time domain into the one hi frequency domain , and resolve the problem to transmit high bit - rate data in multi - path channel 由于移動信道的多種不確定因素,這一矛盾顯得益發突出。 ofdm技術將時域的高要求轉化為頻域的高要求,解決了無線通信中高速率數據傳輸抗干擾的問題。

Today ' s fast growing radio communication market places stronger and stronger demands on the design of a radio system . a proper system design requires accurate and reliable radio channel models , among which the field strength prediction models are most important 隨著無線通信的迅猛發展,特別是頻段提高、蜂窩小區尺度縮小和智能天線系統的使用,對電波傳播預測提出了新一輪的挑戰。

Rthk on internet provides round - the - clock online live webcast of six radio channels ( including radio 1 , radio 2 , radio 3 , radio 4 , radio 5 and putonghua channel ) , carrying a comprehensive range of programmes in cantonese , putonghua and english 24小時網上直播六個頻道節目,包括第1臺、第2臺、第3臺、第4臺,第5臺及普通話臺,包羅粵語、普通話及英語節目,任君選擇。

Hong kong has 13 radio channels , including seven operated by a publicly - funded , editorially independent broadcaster whose mission is to inform , educate and entertain the public through the provision of balanced and objective programmes 香港電臺以公帑經營,是一享有編輯自主的公營廣播機構,其使命是在資訊、教育及娛樂方面,為市民提供取材客觀而份量均衡的廣播節目。

Online webcast was fully developed . all the 6 rthk radio channels and all rthk television programmes broadcast during tv prime - time ( 7 hours of video programmes weekly ) were webcast live . the scripts of chinese news were also provided 全面拓展網上廣播服務,每天直播全部6個電臺頻道、所有黃金時段播出的電視節目(每周共7小時視像節目) ,及提供中文新聞文本。

Hong kong has 13 radio channels , including seven operated by a publicly funded , editorially independent broadcaster whose mission is to inform , educate and entertain the public through the provision of balanced and objective programmes 香港電臺以公帑經營,是享有編輯自主的公營廣播機構,其使命是在資訊教育及娛樂方面,為市民提供取材客觀而份量均衡的廣播節目。

Rthk on internet provides round - the - clock online live webcast of six radio channels including radio 1 , radio 2 , radio 3 , radio 4 , radio 5 and putonghua channel , carrying a comprehensive range of programmes in cantonese , putonghua and english 24小時網上直播六個頻道節目,包括第1臺第2臺第3臺第4臺,第5臺及普通話臺,包羅粵語普通話及英語節目,任君選擇。

“ the new service could reduce the workload of pilots and air traffic controllers and enable them to manage their time better ; reduce congestion in radio channel ; and enhance data integrity and operational efficiency 林光宇說:新服務可減輕飛行員和航空交通管制員的工作量,讓他們能更有效地運用時間;減低無線電頻道的擠塞;以及提高資料準確度和運作效率。

Online webcast was fully developed . all the 6 rthk radio channels and all rthk television programmes broadcast during tv prime - time 7 hours of video programmes weekly were webcast live . the scripts of chinese news were also provided 全面拓展網上廣播服務,每天直播全部6個電臺頻道所有黃金時段播出的電視節目每周共7小時視像節目,及提供中文新聞文本。

On the base of the visual channel model library and estimation algorithm library , the paper advances a integrative design scheme of radio channel simulation environment , which has some technical innovation and practical value 本文在構建可視化信道仿真模型庫和信道估計算法模型庫的基礎上,提出了一種集成化的無線信道仿真環境設計方案。

Hong kong has 13 radio channels - seven operated by rthk , three by hong kong commercial broadcasting company limited ( commercial radio ) and three by metro broadcast corporation limited ( metro broadcast ) 本港現時共有13個廣播電臺,其中香港電臺占7個、香港商業廣播有限公司(簡稱“商業電臺“ )及新城廣播有限公司(簡稱“新城電臺“ )各占3個。

18 tobagi f a , kleinrock l . packet switching in radio channels : part ii - the hidden terminal problem in carrier sense multiple - access and the busy - tone solution . ieee trans . communications , dec . 1975 , com - 23 : 1417 - 1433 通過把數據信道和控制信道分離, rmac不僅極大地提高了數據組播的可靠程度,而且明顯地提高了對數據信道的利用率。

Each radio channel had separately conducted an open audience panel or focus group meeting . some of the ideas raised had subsequently turned into programme initiatives or used as reference for future programme development 在2004 - 05年度,港臺舉辦了一次電視節目顧問團會議,由每個電臺各自進行公開的聽眾評議或小組討論。