无线电工程
無線電工程
무선전공정
RADIO ENGINEERING OF CHINA
2014年
5期
5-8,67
,共5页
DMR%PMR%同步广播%同频干扰%码间干扰
DMR%PMR%同步廣播%同頻榦擾%碼間榦擾
DMR%PMR%동보엄파%동빈간우%마간간우
DMR%PMR%simulcast%co-channel interference%intersymbol interference
针对数字移动无线电（ Digital Mobile Radio， DMR）系统大区制组网存在的局限性，对比了DMR进行多基站组网时异频网络和同频网络两种模式的特点，指出了同频多基站组网的优势和关键技术。通过对同频网络固有的差拍衰落和码间干扰等自干扰问题的分析和研究，根据DMR的基本参数进行了理论计算，提出了减少和消除差拍衰落的方法和措施，并就工程应用中相干区的设计问题给出了相干区的设计原则和建议。
針對數字移動無線電（ Digital Mobile Radio， DMR）繫統大區製組網存在的跼限性，對比瞭DMR進行多基站組網時異頻網絡和同頻網絡兩種模式的特點，指齣瞭同頻多基站組網的優勢和關鍵技術。通過對同頻網絡固有的差拍衰落和碼間榦擾等自榦擾問題的分析和研究，根據DMR的基本參數進行瞭理論計算，提齣瞭減少和消除差拍衰落的方法和措施，併就工程應用中相榦區的設計問題給齣瞭相榦區的設計原則和建議。
침대수자이동무선전（ Digital Mobile Radio， DMR）계통대구제조망존재적국한성，대비료DMR진행다기참조망시이빈망락화동빈망락량충모식적특점，지출료동빈다기참조망적우세화관건기술。통과대동빈망락고유적차박쇠락화마간간우등자간우문제적분석화연구，근거DMR적기본삼수진행료이론계산，제출료감소화소제차박쇠락적방법화조시，병취공정응용중상간구적설계문제급출료상간구적설계원칙화건의。
According to the limitation of district area networking in DMR system,comparing with the characteristics of two kinds of modes between multi-frequency network and single frequency network of multisite networking in DMR,this paper describes the advanta-ges and key technologies of multi-frequency multisite networking.Based on analysis and research on self-interference problems of inher-ent beat fading and inter-symbol interference in single frequency network,and according to the theoretically calculating on basic parame-ters of DMR,this paper puts forward the methods and measures to weaken and eliminate beat fading.In addition,aimed at the design problems of interference area in engineering application, this paper also provides the design principles and suggestions of interference area.
