JPH09200840A - Private radio communication system - Google Patents

Private radio communication system

Info

Publication number
JPH09200840A
JPH09200840A JP8005131A JP513196A JPH09200840A JP H09200840 A JPH09200840 A JP H09200840A JP 8005131 A JP8005131 A JP 8005131A JP 513196 A JP513196 A JP 513196A JP H09200840 A JPH09200840 A JP H09200840A
Authority
JP
Japan
Prior art keywords
base station
optical
channel compensation
signal
compensation unit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP8005131A
Other languages
Japanese (ja)
Inventor
Osamu Chiba
Yoshihiro Imashiyou
義弘 今荘
修 千葉
Original Assignee
Kokusai Electric Co Ltd
国際電気株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kokusai Electric Co Ltd, 国際電気株式会社 filed Critical Kokusai Electric Co Ltd
Priority to JP8005131A priority Critical patent/JPH09200840A/en
Publication of JPH09200840A publication Critical patent/JPH09200840A/en
Application status is Pending legal-status Critical

Links

Abstract

PROBLEM TO BE SOLVED: To realize a private radio communication system capable of broad band and long range transmission.
SOLUTION: A base station 20 and a line compensation devices 50A, 50B,... are connected by optical fibers 90, 91,.... Each of signals such as audio and video signals is frequency-multiplexed and converted into an optical signal and sent via the optical fibers and a receiver side demodulates the signal with the reverse processing to above. The base station 20 and the line compensation devices 50A, 50B,... send/receive a modulated audio signal wave by an antenna for intercommunication.
COPYRIGHT: (C)1997,JPO

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【発明の属する技術分野】本発明は、構内無線通信システムに係り、とくに光ファイバ伝送を利用した構内無線通信システムに関する。 The present invention relates to relates to a private wireless communication system, a private wireless communication system, especially using an optical fiber transmission.

【0002】 [0002]

【従来の技術】従来の構内無線通信システムは、例えば(財)電波システム開発センターの標準規格「空中線電力1mW以下の陸上移動業務の無線局(作業連絡用)の無線設備」(RCR STD−31)において技術基準が規定されている。 A conventional private branch radio communication system is, for example, "the radio equipment of the antenna power 1mW or less of the land mobile service of radio stations (for work contact)" (RCR STD-31 (goods) radio system development center standards technical standards are defined in). これは図9に示すように、操作器9 This is because, as shown in FIG. 9, the operation unit 9
10、基地局920、回線補償装置950A、950 10, the base station 920, channel compensation unit 950A, 950
B、…、携帯機960より構成され、基地局920と回線補償装置950A、950B、…は同軸ケーブル98 B, ..., it is composed of the portable device 960, the base station 920 and the channel compensation unit 950A, 950B, ... coaxial cable 98
0A、980Bで結ばれている。 0A, are connected by 980B.

【0003】図10は、基地局920及び回線補償装置950Aの詳細構成を示したもので、下り回線では、操作器910からの音声信号を変調回路(MOD)922 [0003] Figure 10 shows the detailed structure of the base station 920 and the channel compensation unit 950A, the downlink modulated audio signal from the operation unit 910 circuit (MOD) 922
により変調し、増幅器925で増幅したのち分配回路9 Modulated by, after amplified by the amplifier 925 distributing circuit 9
28と方向性結合器927、930によって、空中線(アンテナ)921と回線補償装置950Aへの信号に分割する。 By 28 and the directional coupler 927,930, it divides the signal to antenna (antenna) 921 and the channel compensation unit 950A. 回線補償装置950Aでは、方向性結合器9 In line compensator 950A, a directional coupler 9
52、増幅器953を経由し、分配回路956と方向性結合器955、958によって、空中線951への送信信号と次の回線補償装置950Bへの信号に分割する。 52, via the amplifier 953, the distribution circuit 956 and the directional coupler 955,958, divides the transmission signal and the next signal to the channel compensation unit 950B to antenna 951.

【0004】一方、上り信号では、回線補償装置950 On the other hand, in the uplink signal, the channel compensation unit 950
Aの方向性結合器955と結合回路957で空中線95 Antenna 95 by the directional coupler 955 and the coupling circuit 957 of the A
1からの受信信号と回線補償装置950Bからの信号との結合を行い、増幅器954で増幅したのち方向性結合器952を経由して基地局920に送信する。 Perform coupling between the received signal and the signal from the channel compensation unit 950B from 1, via the directional coupler 952 after being amplified by the amplifier 954 to the base station 920. 基地局9 The base station 9
20では、結合回路929と方向性結合器927によって回線補償装置950Aからの信号と空中線921からの受信信号との結合を行い、これを増幅器926で増幅したのち各携帯機からの周波数に応じて分配回路924 In 20 performs coupling of the received signal from the signal and the antenna 921 from the channel compensation unit 950A by a coupling circuit 929 and directional coupler 927, which in accordance with the frequency from the portable unit then amplified by an amplifier 926 distribution circuit 924
で信号を分配し、復調回路(DEMOD)923によって復調する。 In distributing signals, demodulated by a demodulator circuit (DEMOD) 923.

【0005】回線補償装置950B、…等の構成も上記の回線補償装置950Aと同じ構成であって、基地局の操作器910と、各回線補償装置950A、950B、 [0005] channel compensation unit 950B, also configuration of ... etc. have the same structure as the channel compensation unit 950A, an operating device 910 of the base station, each channel compensation unit 950A, 950B,
…を介して接続される複数の携帯機との間の1:n(n n (n: 1 between the plurality of the portable device to be connected ... via
≧1)の双方向通話、及び複数の携帯機同志の間での、 ≧ 1) two-way communication, and in between a plurality of portable device comrades,
基地局を介しての双方向通話が行える。 Two-way communication through a base station can be performed.

【0006】 [0006]

【発明が解決しようとする課題】上記した従来の構内無線通信システムでは、基地局と回線補償装置及び回線補償装置間を接続する回線980A、980B、…に同軸ケーブルを使用している。 In THE INVENTION to be solved INVENTION The above described conventional private branch radio communication system, line 980A for connecting the base station and the channel compensation unit and the line compensator, using 980B, a coaxial cable ... to. このため、それらの回線の距離に限界があって、そのままでは広大な構内の場合に対応できず、また送受信信号も音声信号に限られていた。 Therefore, there is a limit to the distance of these lines, is as it can not cope with a case of vast premises, also transmit and receive signals was also limited speech signal.

【0007】本発明の目的は、広帯域、長距離伝送を可能にし、音声信号だけでなく映像信号、データ信号などを一括して伝送することを可能とする、構内無線通信システムを提供することにある。 An object of the present invention, broadband, enabling long-distance transmission, the video signal but also the audio signal, making it possible to transmit data signals such as a collectively, to provide a private wireless communication system is there.

【0008】 [0008]

【課題を解決するための手段】本発明は、少なくとも1 Means for Solving the Problems The present invention, at least one
つの音声信号及び少なくとも1つの映像信号によって互いに周波数の異なるキャリアを変調し、その変調波を含む複数の変調波を周波数多重化したのちアナログ光変調して光伝送路へ送出するとともに、アナログ光変調された光信号を光伝送路から受信してアナログ光復調により周波数多重化された電気信号へ変換し、この電気信号の各周波数成分を分離したのち復調して音声信号及び映像信号を取り出すように構成された基地局と、前記基地局から光伝送路を介して送出されてきたアナログ光変調信号を受信してアナログ光復調により周波数多重化された電気信号に変換し、この電気信号の各周波数成分を分離したのち、音声変調波は付設されたアンテナから送出し、また映像変調波は復調して映像信号を取り出すとともに、少なくとも1 One of modulating the frequency of different carriers from each other by the audio signal and at least one video signal, with a plurality of modulated wave including the modulated wave by analog optical modulator After frequency multiplexes sent to the optical transmission line, the analog optical modulator receives the optical signal from the optical transmission line as converted into an electric signal frequency-multiplexed by the analog optical demodulation extracts an audio signal and a video signal by demodulating after separating the respective frequency components of the electrical signal and configured base station receives the analog optical modulation signal that has been transmitted through the optical transmission path into an electric signal frequency-multiplexed by the analog optical demodulated from the base station, each frequency of the electric signal After separating the components, audio modulated wave is transmitted from the annexed antenna, also takes out the video signal video modulated wave demodulates, at least 1 の映像信号により1つのキャリアを変調し、前記付設されたアンテナで受信した音声変調波及び前記映像信号による変調波を含む複数の変調波を周波数多重化したのちアナログ光変調して光伝送路を介して前記基地局へ送信するように構成した回線補償装置の複数個と、を備えたことを特徴とする構内無線通信システムを開示する。 Of modulating one carrier by the video signal, the optical transmission path by the analog optical modulator After frequency multiplexing a plurality of modulated wave including a modulation wave by voice modulation wave and the video signal received by the attached antennas through it discloses a private wireless communication system, characterized in that it and a plurality of configuration the channel compensation unit to transmit to the base station.

【0009】 [0009]

【発明の実施の形態】以下、本発明をその実施の形態に沿って説明する。 BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, will be described along the invention to that embodiment. 図2は、本発明になる構内無線通信システムの第1の実施の形態を示す概略ブロック図で、基地局20と回線補償装置50A、50B、…のそれぞれの間を2本の光ファイバ90〜93で結んだ場合である。 Figure 2 is a schematic block diagram showing a first embodiment of the private branch radio communication system according to the present invention, the base station 20 and the channel compensation unit 50A, 50B, ... 2 optical fibers 90 between the respective it is a case where tied at 93. これらの光ファイバはそれぞれ下り、上り信号を伝送する。 These optical fibers downstream respectively, to transmit the uplink signal. 図1は、基地局20及び回線補償装置50Aのより詳細な構成を示すもので、基地局20には、多数の音声信号や映像信号、データ信号などの多重・分配・変復調回路40を設け、さらに回線補償装置50A、…にも同様に多重・分配・変復調回路70を設け、これらの多様な信号の送受信を、伝送帯域を広く使える光ファイバ経由で送受信できるようにしている。 Figure 1 shows a more detailed configuration of the base station 20 and the channel compensation unit 50A, the base station 20, a number of audio signals and video signals, a multi-distributing and modem circuit 40 such as a data signal provided, Furthermore channel compensation unit 50A, ... similarly provided a multi-distributing and modem circuit 70 to the transmission and reception of these various signals are to be sent and received through the wide use optical fiber transmission bandwidth.

【0010】また、基地局20と回線補償装置50A間は光ファイバ90、91で結ばれているため、下り系については、基地局20で電光変換器(E/O)31によってアナロ光変調により電気信号から光信号へ変換後に伝送し、回線補償装置50Aでは、下り光信号を方向性結合器59によって次の回線補償装置50Bへの信号と自装置への信号とに分け、自装置内への光信号は光電変換器(E/O)61によって電気信号に変換する。 Further, since the inter-base station 20 and the channel compensation unit 50A are connected by optical fibers 90 and 91, for the downstream system, the analog light modulated by electro-optic converter (E / O) 31 in the base station 20 transmitted from the electric signals after conversion into optical signals, the channel compensation unit 50A, it divides the downstream optical signal by the directional coupler 59 to the signal to the signal and the own device to the next line compensator 50B, the own-device the optical signal is converted into an electric signal by a photoelectric converter (E / O) 61. 一方、上り系については、回線補償装置50では電光変換器(E/O)62によってアナロ光変調を用いて電気信号から光信号への変換を行い、方向性結合器60によって別の回線補償装置50Bからの上り光信号と結合を行って基地局20に送信し、基地局20では光電変換器(O/E)32によって光信号を電気信号に変換する。 On the other hand, the upstream system, the channel compensation unit 50 in the electro-optic converter (E / O) 62 performs the conversion of the optical signal from the electrical signal by using the analog light modulated by another channel compensation device by the directional coupler 60 transmitted to the base station 20 performs coupling and upstream optical signals from 50B, converts the optical signal into an electrical signal by the base station 20 photoelectric converter (O / E) 32.
回線補償装置50B、…等の構成も回線補償装置50A Channel compensation unit 50B, the configuration of the ... the like are also the channel compensation unit 50A
と同じである。 Is the same as that.

【0011】なお、図1にて符号25、26、53、5 [0011] It is to be noted that reference numeral in FIG. 1 25,26,53,5
4は増幅器を、符号28は分配回路を、符号29は結合回路を、符号27、55は方向性結合器を、さらに符号21、51は空中線を表しており、これらは図10の従来構成と同様な作用をする。 4 an amplifier, a reference numeral 28 a distribution circuit, numeral 29 a coupling circuit, numeral 27 and 55 is a directional coupler, and further reference numeral 21 and 51 denotes the antenna, they are a conventional arrangement of FIG. 10 to the same effect.

【0012】図3は、基地局20内の多重・分配・変復調回路40の詳細な構成例を示すブロック図で、送信側では変調回路41により、音声、映像、データの各信号により各々適当な周波数f a 、f v 、f dの変調波を生成し、周波数多重化回路43で多重化する。 [0012] Figure 3 is a block diagram illustrating a detailed configuration example of a multi-distributing and modem circuit 40 in the base station 20, the modulation circuit 41 on the transmission side, each suitable audio, video, by each signal of the data frequency f a, f v, generates a modulated wave of f d, is multiplexed in a frequency multiplexing circuit 43. 一方、受信側では、周波数多重化された信号を分配回路44で分離し、各周波数f aA 、…f dBの変調信号に対して復調回路42により復調を行う。 On the other hand, on the receiving side, the frequency multiplexed signal is separated by the distribution circuit 44, the frequency f aA, perform demodulation by the demodulation circuit 42 with respect ... f dB of the modulation signal. なお、この例では送信側の入力信号がそれぞれ1つづつの場合を示しているが、複数の種類の場合にも適用できることは云うまでもない。 Although the input signal of the transmission side in this example indicates the case one by one, respectively, it is needless to say that can be applied to the case of a plurality of types. また上記の受信側の入力の周波数f aA 、…f dB等に付された添字A、B、…は、各回線補償装置を表す符号50A、 The above reception side of the input frequency f aA, ... subscripts A attached to f dB, etc., B, ..., the code 50A representing each channel compensation device,
50B、…のA、B、…に対応し、例えばf aAは回線補償装置50Aからの音声信号、f dBは回線補償装置50 50B, corresponds ... A, B, to ... of, for example f aA audio signal from the channel compensation unit 50A, f dB the line compensator 50
Bからのデータ信号をそれぞれ表すものとする。 It is intended to refer respectively data signals from B.

【0013】図4は、各回線補償装置の多重・分配・変復調回路70の詳細な構成例を示すブロック図で、受信側では周波数多重化された信号を分配回路73で分離し、その分離した各周波数f v 、f d 、f aの信号に対して復調回路71により復調を行う。 [0013] Figure 4 is a block diagram illustrating a detailed configuration example of a multi-distributing and modem circuit 70 of the channel compensation unit, it separates the frequency multiplexed signal distribution circuit 73 on the receiving side, and the separated each frequency f v, perform demodulation by the demodulation circuit 71 with respect to f d, f a signal. 一方、送信側では、 On the other hand, the transmitting side,
変調回路72により、すでに変調波としてアンテナ51 The modulation circuit 72, already antenna 51 as the modulated wave
から受信されている音声信号を除いて、映像、データ信号により各々適当な周波数f vA 、f dAの変調波を生成し、多重化回路74で多重化して送信する。 Except for the audio signal being received from the video, each appropriate frequency f vA by the data signal to generate a modulated wave of f dA, and transmits the multiplexed by the multiplexing circuit 74. なお、各回線補償装置からの信号を音声(添字a)、映像(添字v)、データ(添字d)それぞれ1個づつとしたが、これらの一部又は全部が複数であってもよく、その場合は基地局20の多重・分配・変復調回路40もそれに対応した構成とすればよい。 Incidentally, the signals from each line compensator voice (subscript a), video (subscript v), data (subscript d) were each set to one by one, may be some or all of these plural, the it may be a configuration corresponding to it even multi-distributing and modem circuit 40 of the base station 20 if. 以上の構成によれば、光ファイバの長距離・広帯域の伝送特性を利用することで、広い構内で多数の回線補償装置を用いるシステムでも容易に実現可能で、かつ音声以外の、映像やデータ信号の伝送も可能になる。 According to the above configuration, by utilizing the transmission characteristics of the long-distance and broadband optical fiber, broad premises in also easily realized in a system using multiple channel compensation device, and other than the voice, video and data signals transmission also becomes possible.

【0014】図5は、本発明になる構内無線通信システムの別の実施の形態を示すブロック図で、基地局20と回線補償装置50A、及び各回線補償装置の間を1本の光ファイバで接続するようにしたものである。 [0014] Figure 5 is a block diagram showing another embodiment of the private branch radio communication system according to the present invention, the base station 20 and the channel compensation unit 50A, and between each line compensator in one optical fiber it is obtained to be connected. このために、図1の構成に対して、基地局20内に方向性結合器33を設け、また回線補償装置50Aの方向性結合器5 For this, the configuration of FIG. 1, is provided a directional coupler 33 to the base station 20, also the directional coupler line compensator 50A 5
9、60に代わって方向性結合器63を設け、これらによって1本の光ファイバで各装置間の双方向通信を行えるようにしたものであり、図1の場合と同様な効果が得られる。 9,60 provided a directional coupler 63 in place of, these by is obtained by the allow bidirectional communication between the devices in a single optical fiber, the same effect as the case of FIG. 1 can be obtained. なお、さらに別の変形例としては、上り、下り方向で用いる光信号の波長を変え、これによって上下方向の信号分離を行うようにすることもできる。 As yet another variation, up, changing the wavelength of the optical signal used in the down direction, whereby it is also possible to perform the signal separation in the vertical direction.

【0015】図6は、本発明になる構内無線通信システムのさらに別の実施の形態を示すブロック図で、複数の回線補償装置50A、50B、50C、…が基地局20 [0015] Figure 6 is a block diagram showing still another embodiment of the private branch radio communication system according to the present invention, a plurality of channel compensation unit 50A, 50B, 50C, ... is the base station 20
に対してスター状に光ファイバ90A、91A、90 Optical fiber 90A in a star shape with respect to, 91A, 90
B、91B、90C、91C、…で接続されて成る構成である。 B, and 91B, 90C, 91C, formed by connecting ... in configuration.

【0016】図7は、この場合の基地局20と回線補償装置50Aのより詳細な構成を示しており、他の回線補償装置50B、50C、…も回線補償装置50Aと同じである。 [0016] Figure 7 shows a more detailed configuration of the base station 20 and the channel compensation unit 50A in this case, other channel compensation device 50B, 50C, ... is also the same as the channel compensation unit 50A. 図7の構成は、図1と同様に基地局と回線補償装置間を2本の光ファイバ90A、91Aで結んでいるが、他の回線補償装置も直接基地局へ接続できるようにスターカプラ34、35が基地局20に設けられている点が異なっており、また回線補償装置の構成は、基地局20とのみ接続すればよいので、図1の方向性結合器5 Arrangement of Figure 7, two optical fibers 90A between the base station and the channel compensation unit similar to FIG. 1, but signed at 91A, star coupler 34 so that it can connect directly to the base station also other channel compensation unit , have different points 35 are provided in the base station 20, also configuration of the channel compensation device, it is sufficient only connected with the base station 20, the directional coupler 1 5
9、60が不要になっている点が異なっている。 9,60 is different in that are no longer needed. 動作としては図1と同じ効果がある。 The operation has the same effect as FIG.

【0017】図8は、図6、図7で示した実施の形態を、光ファイバ1本で上り、下りを兼用するように構成したもので、この場合には、基地局20のスターカプラ36がスター結合と同時に双方向の伝送を可能としており、さらに回線補償装置50Aには方向性結合器64を設けて、こちらも双方向の伝送を可能なようにしている点が図7の構成と異なっている。 [0017] Figure 8, Figure 6, the embodiment shown in FIG. 7, the up by one optical fiber, which was configured to shared downlink, in this case, a star coupler 36 of the base station 20 There is it possible to simultaneously bidirectional transmission and star join, even more channel compensation unit 50A is provided a directional coupler 64, and here also the point that the allow two-way transmission of Figure 7 configuration It is different. 動作上は、やはり図1 Operationally, still Figure 1
の構成と同様な効果が得られる。 Configuration and similar effect can be obtained.

【0018】 [0018]

【発明の効果】従来、構内無線通信システムにおいて使われていた同軸ケーブルを光ファイバに置き換えることによって、広帯域、長距離の伝送が可能となり、多重・ Effect of the Invention Conventionally, by replacing the coaxial cable was used in the private branch radio communication system in the optical fiber, broadband, it allows long-distance transmission, multi-
分配回路を用いることによって音声信号だけでなく、映像信号、データ信号など多種の信号伝送が可能となる。 Not only audio signal by using the distribution circuit, a video signal, a wide signal transmission such as a data signal becomes possible.
また、光ファイバを用いるため、同軸ケーブルとは違い漏話の心配がなく、他の伝送媒体に影響を及ぼさず、また外部よりの影響を受けないという利点がある。 Also, since an optical fiber is used, there is no fear of difference crosstalk coaxial cable, there is an advantage that without affecting other transmission media, also not affected from the outside. 更に、 In addition,
光ファイバは同軸ケーブルに比べ細径、軽量であるため、敷設コストを低減できるとともに柔軟な線路網の構築が可能となる。 Optical fiber diameter compared with the coaxial cable, because it is lightweight, permits the construction of flexible line network can be reduced and at the same installation cost. これらの効果により、カメラによる構内監視システム等の構築が構内無線通信システムを用いることによって容易に実現可能となる。 These effects construction of such premises surveillance system by the camera can be easily realized by using a private wireless communication system.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】本発明になる構内無線通信システムを構成する基地局及び回線補償装置の実施の形態の一例を示すブロック図である。 1 is a block diagram showing an example of an embodiment of a base station and channel compensation devices constituting a private wireless communication system according to the present invention.

【図2】図1の基地局及び回線補償装置を用いた構内無線通信システムの構成図である。 2 is a block diagram of the private branch radio communication system using a base station and a channel compensation unit of FIG.

【図3】基地局に設けられた多重・分配・変復調回路の詳細構成例を示す図である。 3 is a diagram illustrating a detailed configuration example of a multi-distributing and modem circuitry in a base station.

【図4】回線補償装置に設けられた多重・分配・変復調回路の詳細構成例を示す図である。 4 is a diagram illustrating a detailed configuration example of a multi-distributing and modem circuit provided in the channel compensation unit.

【図5】図1の実施の形態の変形例を示すブロック図である。 5 is a block diagram showing a modification of the embodiment of FIG.

【図6】本発明になる構内無線通信システムの実施の形態の他の例を示すブロック図である。 6 is a block diagram showing another example of the embodiment of the private branch radio communication system according to the present invention.

【図7】図6の実施の形態を構成する基地局及び回線補償装置の構成例を示すブロック図である。 7 is a block diagram showing a configuration example of a base station and a channel compensation device constituting the embodiment of Figure 6.

【図8】図6の実施の形態の変形例に対応する基地局及び回線補償装置の構成例を示すブロック図である。 8 is a block diagram showing a configuration example of a base station and a channel compensation device corresponding to a variation of the embodiment of FIG.

【図9】従来の構内無線通信システムの概略図である。 9 is a schematic diagram of a conventional private branch radio communication system.

【図10】従来の構内無線通信システムの構成図である。 10 is a configuration diagram of a conventional private branch radio communication system.

【符号の説明】 DESCRIPTION OF SYMBOLS

20 基地局 21、51 空中線 31、62 電光変換器 32、61 光電変換器 33、59、60、63、64 方向性結合器 34、35、36 スターカプラ 40、70 多重・分配・変復調回路 50A、50B、50C 回線補償装置 90、91、92、93 光ファイバ 90A、90B、90C、91A、91B、91C 光ファイバ 20 the base station 21, 51 Antenna 31,62 electrooptical converter 32,61 photoelectric converter 33,59,60,63,64 directional coupler 34, 35, and 36, the star coupler 40, 70 multi-distributing and modem circuit 50A, 50B, 50C channel compensation unit 90, 91, 92, 93 optical fibers 90A, 90B, 90C, 91A, 91B, 91C optical fiber

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl. 6識別記号 庁内整理番号 FI 技術表示箇所 H04B 10/06 H04Q 3/58 101 ────────────────────────────────────────────────── ─── front page continued (51) Int.Cl. 6 identification symbol Agency Docket No. FI art display portion H04B 10/06 H04Q 3/58 101

Claims (5)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 少なくとも1つの音声信号及び少なくとも1つの映像信号によって互いに周波数の異なるキャリアを変調し、その変調波を含む複数の変調波を周波数多重化したのちアナログ光変調して光伝送路へ送出するとともに、アナログ光変調された光信号を光伝送路から受信してアナログ光復調により周波数多重化された電気信号へ変換し、この電気信号の各周波数成分を分離したのち復調して音声信号及び映像信号を取り出すように構成された基地局と、 前記基地局から光伝送路を介して送出されてきたアナログ光変調信号を受信してアナログ光復調により周波数多重化された電気信号に変換し、この電気信号の各周波数成分を分離したのち、音声変調波は付設されたアンテナから送出し、また映像変調波は復調して映像信号を取り 1. A modulating frequency different carriers from each other by at least one audio signal and at least one video signal, a plurality of modulated wave including the modulated wave by analog optical modulator After frequency-multiplexed to the optical transmission line sends out, to receive the analog optical modulated optical signal from the optical transmission line is converted into an electric signal frequency-multiplexed by the analog optical demodulation audio signal and demodulates after separating the respective frequency components of the electrical signal and a configured base station to retrieve the video signal receives the analog optical modulation signal that has been transmitted through the optical transmission path into an electric signal frequency-multiplexed by the analog optical demodulated from the base station , after separating the respective frequency components of the electrical signal, the audio-modulated wave is transmitted from the annexed antenna, also the video modulated wave takes a video signal by demodulating すとともに、少なくとも1つの映像信号により1つのキャリアを変調し、前記付設されたアンテナで受信した音声変調波及び前記映像信号による変調波を含む複数の変調波を周波数多重化したのちアナログ光変調して光伝送路を介して前記基地局へ送信するように構成した回線補償装置の複数個と、 を備えたことを特徴とする構内無線通信システム。 Together to modulates one carrier by at least one video signal, an analog light modulated After frequency multiplexing a plurality of modulated wave including a modulation wave by voice modulation wave and the video signal received by the attached antennas private wireless communication system, comprising the a plurality of channel compensation device configured to transmit to the base station via the optical transmission path Te.
  2. 【請求項2】 前記光伝送路は、前記基地局と前記複数の回線補償装置とを前記基地局を一端として縦属接続し、かつ前記基地局からの下り回線と前記基地局へ向かう上り回線とは別の光ファイバ伝送路で構成されるとともに、 前記回線補償装置の各々は、前記下り回線の光ファイバ伝送路から受信した光信号の一部を自装置内へ取り込み残りを下流の回線補償装置へ送るための方向性結合器と、前記上り回線の光ファイバ伝送路から受信した光信号と自装置内で生成した光信号とを合成して上流の回線補償装置又は基地局へ送出するための方向性結合器とを備えたことを特徴とする請求項1に記載の構内無線通信システム。 Wherein said optical transmission path, uplink with the base station the longitudinal genus connecting a plurality of the channel compensation unit as part of the base station, and toward the downstream line and the base station from the base station together are constituted by another optical fiber transmission line and each of the channel compensation unit, downstream channel compensation remaining incorporation into the self-device part of the optical signal received from the optical fiber transmission path of the downlink a directional coupler for sending to the device, the upstream line for transmitting an optical signal generated by the optical signal and received its own device from the optical fiber transmission path combining to upstream channel compensation unit or the base station private wireless communication system according to claim 1, characterized in that a directional coupler.
  3. 【請求項3】 前記光伝送路は、前記基地局と前記複数の回線補償装置とを前記基地局を一端として縦属接続し、かつ前記基地局からの下り回線と前記基地局へ向かう上り回線とは一つの光ファイバ伝送路で構成されるとともに、 前記回線補償装置の各々は、前記下り回線の光ファイバ伝送路から受信した光信号の一部を自装置内へ取り込み残りを下流の回線補償装置へ送るとともに、前記上り回線の光ファイバ伝送路から受信した光信号と自装置内で生成した光信号とを合成して上流の回線補償装置又は基地局へ送出するための方向性結合器を備え、 前記基地局は、当該基地局で送受信する光信号を分離するための方向性結合器を備えたことを特徴とする請求項1に記載の構内無線通信システム。 Wherein the optical transmission path, uplink with the base station the longitudinal genus connecting a plurality of the channel compensation unit as part of the base station, and toward the downstream line and the base station from the base station together it is constituted by a single optical fiber transmission line and each of the channel compensation unit, downstream channel compensation remaining incorporation into the self-device part of the optical signal received from the optical fiber transmission path of the downlink and it sends to the device, a directional coupler for sending by combining the optical signal to the upstream channel compensation unit or the base station generated in the optical signal and the own-device received from the optical fiber transmission path of the upstream line wherein the base station, private wireless communications system of claim 1, further comprising a directional coupler for separating an optical signal transmitted and received in the base station.
  4. 【請求項4】 前記光伝送路は、前記基地局と前記回線補償装置の各々とをスター状に接続し、かつ各基地局からの下り回線と各回線補償装置から基地局へ向かう上り回線とは別の光ファイバ伝送路で構成されるとともに、 前記基地局は、前記送出する光信号を前記各回線補償装置向けの光ファイバ伝送路へ分配するためのスターカプラと、各回線補償装置からの光信号を結合して受信するためのスターカプラとを備えたことを特徴とする請求項1に記載の構内無線通信システム。 Wherein said optical transmission path connects the each of the channel compensation unit and the base station in a star, and the uplink toward the base station from each channel compensation unit and downlink from the base station together is constituted by another optical fiber transmission line, said base station, a star coupler for distributing the optical signal to the sent to the optical fiber transmission path of the respective channel compensation device for, from the channel compensation unit private wireless communication system according to claim 1, characterized in that a star coupler for receiving and coupling the optical signal.
  5. 【請求項5】 前記光伝送路は、前記基地局と前記回線補償装置の各々とをスター状に接続し、かつ各基地局からの下り回線と各回線補償装置から基地局へ向かう上り回線とは各回線補償装置ごとに1つの光ファイバ伝送路で構成されるとともに、 前記基地局は、前記送出する光信号を前記各回線補償装置向けの光ファイバ伝送路へ分配し、かつ各回線補償装置からの光信号を結合して受信するためのスターカプラを備え、 前記回線補償装置の各々は、当該回線補償装置が送受信する光信号を分離するための方向性結合器を備えたことを特徴とする請求項1に記載の構内無線通信システム。 Wherein said optical transmission line connects the each of the channel compensation unit and the base station in a star, and the uplink toward the base station from each channel compensation unit and downlink from the base station together are constituted by a single optical fiber transmission path for each channel compensation unit, the base station, the optical signal to the delivery distributor said to optical fiber transmission path of each channel compensation device for, and the channel compensation unit comprising a star coupler for receiving coupling to an optical signal from each of the channel compensation unit, and characterized in that the channel compensation device including a directional coupler for separating an optical signal transmitted and received private wireless communication system of claim 1,.
JP8005131A 1996-01-16 1996-01-16 Private radio communication system Pending JPH09200840A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8005131A JPH09200840A (en) 1996-01-16 1996-01-16 Private radio communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8005131A JPH09200840A (en) 1996-01-16 1996-01-16 Private radio communication system

Publications (1)

Publication Number Publication Date
JPH09200840A true JPH09200840A (en) 1997-07-31

Family

ID=11602767

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8005131A Pending JPH09200840A (en) 1996-01-16 1996-01-16 Private radio communication system

Country Status (1)

Country Link
JP (1) JPH09200840A (en)

Cited By (47)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002374210A (en) * 2001-06-15 2002-12-26 Sumitomo Electric Ind Ltd Optical communication system
US6636747B2 (en) 1998-03-06 2003-10-21 Communications Research Laboratory, Independent Administrative Institution Multi-mode radio transmission system
US6937878B2 (en) 2000-07-10 2005-08-30 Samsung Electronics Co., Ltd. Mobile communication network system using digital optical link
US6973304B2 (en) 1998-04-23 2005-12-06 National Institute Of Information And Communications Technology Incorporated Administrative Agency Multimode service radio communication method and apparatus
WO2007142805A2 (en) 2006-05-19 2007-12-13 Corning Cable Systems Llc Fiber optic cable and fiber optic cable assembly for wireless access
US7327919B1 (en) * 2004-06-25 2008-02-05 Jimmy Ko Fiber optic audio cable
US8867919B2 (en) 2007-07-24 2014-10-21 Corning Cable Systems Llc Multi-port accumulator for radio-over-fiber (RoF) wireless picocellular systems
US8873585B2 (en) 2006-12-19 2014-10-28 Corning Optical Communications Wireless Ltd Distributed antenna system for MIMO technologies
US8913892B2 (en) 2010-10-28 2014-12-16 Coring Optical Communications LLC Sectorization in distributed antenna systems, and related components and methods
US9037143B2 (en) 2010-08-16 2015-05-19 Corning Optical Communications LLC Remote antenna clusters and related systems, components, and methods supporting digital data signal propagation between remote antenna units
US9042732B2 (en) 2010-05-02 2015-05-26 Corning Optical Communications LLC Providing digital data services in optical fiber-based distributed radio frequency (RF) communication systems, and related components and methods
US9112611B2 (en) 2009-02-03 2015-08-18 Corning Optical Communications LLC Optical fiber-based distributed antenna systems, components, and related methods for calibration thereof
US9178635B2 (en) 2014-01-03 2015-11-03 Corning Optical Communications Wireless Ltd Separation of communication signal sub-bands in distributed antenna systems (DASs) to reduce interference
US9184843B2 (en) 2011-04-29 2015-11-10 Corning Optical Communications LLC Determining propagation delay of communications in distributed antenna systems, and related components, systems, and methods
US9219879B2 (en) 2009-11-13 2015-12-22 Corning Optical Communications LLC Radio-over-fiber (ROF) system for protocol-independent wired and/or wireless communication
US9240835B2 (en) 2011-04-29 2016-01-19 Corning Optical Communications LLC Systems, methods, and devices for increasing radio frequency (RF) power in distributed antenna systems
US9247543B2 (en) 2013-07-23 2016-01-26 Corning Optical Communications Wireless Ltd Monitoring non-supported wireless spectrum within coverage areas of distributed antenna systems (DASs)
US9258052B2 (en) 2012-03-30 2016-02-09 Corning Optical Communications LLC Reducing location-dependent interference in distributed antenna systems operating in multiple-input, multiple-output (MIMO) configuration, and related components, systems, and methods
US9319138B2 (en) 2010-02-15 2016-04-19 Corning Optical Communications LLC Dynamic cell bonding (DCB) for radio-over-fiber (RoF)-based networks and communication systems and related methods
US9325429B2 (en) 2011-02-21 2016-04-26 Corning Optical Communications LLC Providing digital data services as electrical signals and radio-frequency (RF) communications over optical fiber in distributed communications systems, and related components and methods
US9357551B2 (en) 2014-05-30 2016-05-31 Corning Optical Communications Wireless Ltd Systems and methods for simultaneous sampling of serial digital data streams from multiple analog-to-digital converters (ADCS), including in distributed antenna systems
US9385810B2 (en) 2013-09-30 2016-07-05 Corning Optical Communications Wireless Ltd Connection mapping in distributed communication systems
US9420542B2 (en) 2014-09-25 2016-08-16 Corning Optical Communications Wireless Ltd System-wide uplink band gain control in a distributed antenna system (DAS), based on per band gain control of remote uplink paths in remote units
US9455784B2 (en) 2012-10-31 2016-09-27 Corning Optical Communications Wireless Ltd Deployable wireless infrastructures and methods of deploying wireless infrastructures
US9525472B2 (en) 2014-07-30 2016-12-20 Corning Incorporated Reducing location-dependent destructive interference in distributed antenna systems (DASS) operating in multiple-input, multiple-output (MIMO) configuration, and related components, systems, and methods
US9525488B2 (en) 2010-05-02 2016-12-20 Corning Optical Communications LLC Digital data services and/or power distribution in optical fiber-based distributed communications systems providing digital data and radio frequency (RF) communications services, and related components and methods
US9531452B2 (en) 2012-11-29 2016-12-27 Corning Optical Communications LLC Hybrid intra-cell / inter-cell remote unit antenna bonding in multiple-input, multiple-output (MIMO) distributed antenna systems (DASs)
US9602210B2 (en) 2014-09-24 2017-03-21 Corning Optical Communications Wireless Ltd Flexible head-end chassis supporting automatic identification and interconnection of radio interface modules and optical interface modules in an optical fiber-based distributed antenna system (DAS)
US9621293B2 (en) 2012-08-07 2017-04-11 Corning Optical Communications Wireless Ltd Distribution of time-division multiplexed (TDM) management services in a distributed antenna system, and related components, systems, and methods
US9647758B2 (en) 2012-11-30 2017-05-09 Corning Optical Communications Wireless Ltd Cabling connectivity monitoring and verification
US9661781B2 (en) 2013-07-31 2017-05-23 Corning Optical Communications Wireless Ltd Remote units for distributed communication systems and related installation methods and apparatuses
US9673904B2 (en) 2009-02-03 2017-06-06 Corning Optical Communications LLC Optical fiber-based distributed antenna systems, components, and related methods for calibration thereof
US9681313B2 (en) 2015-04-15 2017-06-13 Corning Optical Communications Wireless Ltd Optimizing remote antenna unit performance using an alternative data channel
US9715157B2 (en) 2013-06-12 2017-07-25 Corning Optical Communications Wireless Ltd Voltage controlled optical directional coupler
US9729267B2 (en) 2014-12-11 2017-08-08 Corning Optical Communications Wireless Ltd Multiplexing two separate optical links with the same wavelength using asymmetric combining and splitting
US9730228B2 (en) 2014-08-29 2017-08-08 Corning Optical Communications Wireless Ltd Individualized gain control of remote uplink band paths in a remote unit in a distributed antenna system (DAS), based on combined uplink power level in the remote unit
US9775123B2 (en) 2014-03-28 2017-09-26 Corning Optical Communications Wireless Ltd. Individualized gain control of uplink paths in remote units in a distributed antenna system (DAS) based on individual remote unit contribution to combined uplink power
US9807700B2 (en) 2015-02-19 2017-10-31 Corning Optical Communications Wireless Ltd Offsetting unwanted downlink interference signals in an uplink path in a distributed antenna system (DAS)
US9948349B2 (en) 2015-07-17 2018-04-17 Corning Optical Communications Wireless Ltd IOT automation and data collection system
US9974074B2 (en) 2013-06-12 2018-05-15 Corning Optical Communications Wireless Ltd Time-division duplexing (TDD) in distributed communications systems, including distributed antenna systems (DASs)
US10096909B2 (en) 2014-11-03 2018-10-09 Corning Optical Communications Wireless Ltd. Multi-band monopole planar antennas configured to facilitate improved radio frequency (RF) isolation in multiple-input multiple-output (MIMO) antenna arrangement
US10110308B2 (en) 2014-12-18 2018-10-23 Corning Optical Communications Wireless Ltd Digital interface modules (DIMs) for flexibly distributing digital and/or analog communications signals in wide-area analog distributed antenna systems (DASs)
US10128951B2 (en) 2009-02-03 2018-11-13 Corning Optical Communications LLC Optical fiber-based distributed antenna systems, components, and related methods for monitoring and configuring thereof
US10135533B2 (en) 2014-11-13 2018-11-20 Corning Optical Communications Wireless Ltd Analog distributed antenna systems (DASS) supporting distribution of digital communications signals interfaced from a digital signal source and analog radio frequency (RF) communications signals
US10136200B2 (en) 2012-04-25 2018-11-20 Corning Optical Communications LLC Distributed antenna system architectures
US10187151B2 (en) 2014-12-18 2019-01-22 Corning Optical Communications Wireless Ltd Digital-analog interface modules (DAIMs) for flexibly distributing digital and/or analog communications signals in wide-area analog distributed antenna systems (DASs)
US10236924B2 (en) 2016-03-31 2019-03-19 Corning Optical Communications Wireless Ltd Reducing out-of-channel noise in a wireless distribution system (WDS)

Cited By (76)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6636747B2 (en) 1998-03-06 2003-10-21 Communications Research Laboratory, Independent Administrative Institution Multi-mode radio transmission system
US6973304B2 (en) 1998-04-23 2005-12-06 National Institute Of Information And Communications Technology Incorporated Administrative Agency Multimode service radio communication method and apparatus
US6937878B2 (en) 2000-07-10 2005-08-30 Samsung Electronics Co., Ltd. Mobile communication network system using digital optical link
JP2002374210A (en) * 2001-06-15 2002-12-26 Sumitomo Electric Ind Ltd Optical communication system
US7327919B1 (en) * 2004-06-25 2008-02-05 Jimmy Ko Fiber optic audio cable
WO2007142805A3 (en) * 2006-05-19 2008-03-06 Corning Cable Sys Llc Fiber optic cable and fiber optic cable assembly for wireless access
WO2007142805A2 (en) 2006-05-19 2007-12-13 Corning Cable Systems Llc Fiber optic cable and fiber optic cable assembly for wireless access
JP2009537964A (en) * 2006-05-19 2009-10-29 コーニング ケーブル システムズ リミテッド ライアビリティ カンパニー Optical fiber cables and optical fiber cable assemblies for wireless access
US9130613B2 (en) 2006-12-19 2015-09-08 Corning Optical Communications Wireless Ltd Distributed antenna system for MIMO technologies
US8873585B2 (en) 2006-12-19 2014-10-28 Corning Optical Communications Wireless Ltd Distributed antenna system for MIMO technologies
US8867919B2 (en) 2007-07-24 2014-10-21 Corning Cable Systems Llc Multi-port accumulator for radio-over-fiber (RoF) wireless picocellular systems
US9673904B2 (en) 2009-02-03 2017-06-06 Corning Optical Communications LLC Optical fiber-based distributed antenna systems, components, and related methods for calibration thereof
US9900097B2 (en) 2009-02-03 2018-02-20 Corning Optical Communications LLC Optical fiber-based distributed antenna systems, components, and related methods for calibration thereof
US9112611B2 (en) 2009-02-03 2015-08-18 Corning Optical Communications LLC Optical fiber-based distributed antenna systems, components, and related methods for calibration thereof
US10128951B2 (en) 2009-02-03 2018-11-13 Corning Optical Communications LLC Optical fiber-based distributed antenna systems, components, and related methods for monitoring and configuring thereof
US10153841B2 (en) 2009-02-03 2018-12-11 Corning Optical Communications LLC Optical fiber-based distributed antenna systems, components, and related methods for calibration thereof
US9729238B2 (en) 2009-11-13 2017-08-08 Corning Optical Communications LLC Radio-over-fiber (ROF) system for protocol-independent wired and/or wireless communication
US9219879B2 (en) 2009-11-13 2015-12-22 Corning Optical Communications LLC Radio-over-fiber (ROF) system for protocol-independent wired and/or wireless communication
US9485022B2 (en) 2009-11-13 2016-11-01 Corning Optical Communications LLC Radio-over-fiber (ROF) system for protocol-independent wired and/or wireless communication
US9319138B2 (en) 2010-02-15 2016-04-19 Corning Optical Communications LLC Dynamic cell bonding (DCB) for radio-over-fiber (RoF)-based networks and communication systems and related methods
US9853732B2 (en) 2010-05-02 2017-12-26 Corning Optical Communications LLC Digital data services and/or power distribution in optical fiber-based distributed communications systems providing digital data and radio frequency (RF) communications services, and related components and methods
US9525488B2 (en) 2010-05-02 2016-12-20 Corning Optical Communications LLC Digital data services and/or power distribution in optical fiber-based distributed communications systems providing digital data and radio frequency (RF) communications services, and related components and methods
US9270374B2 (en) 2010-05-02 2016-02-23 Corning Optical Communications LLC Providing digital data services in optical fiber-based distributed radio frequency (RF) communications systems, and related components and methods
US9042732B2 (en) 2010-05-02 2015-05-26 Corning Optical Communications LLC Providing digital data services in optical fiber-based distributed radio frequency (RF) communication systems, and related components and methods
US10014944B2 (en) 2010-08-16 2018-07-03 Corning Optical Communications LLC Remote antenna clusters and related systems, components, and methods supporting digital data signal propagation between remote antenna units
US9037143B2 (en) 2010-08-16 2015-05-19 Corning Optical Communications LLC Remote antenna clusters and related systems, components, and methods supporting digital data signal propagation between remote antenna units
US8913892B2 (en) 2010-10-28 2014-12-16 Coring Optical Communications LLC Sectorization in distributed antenna systems, and related components and methods
US9813164B2 (en) 2011-02-21 2017-11-07 Corning Optical Communications LLC Providing digital data services as electrical signals and radio-frequency (RF) communications over optical fiber in distributed communications systems, and related components and methods
US10205538B2 (en) 2011-02-21 2019-02-12 Corning Optical Communications LLC Providing digital data services as electrical signals and radio-frequency (RF) communications over optical fiber in distributed communications systems, and related components and methods
US9325429B2 (en) 2011-02-21 2016-04-26 Corning Optical Communications LLC Providing digital data services as electrical signals and radio-frequency (RF) communications over optical fiber in distributed communications systems, and related components and methods
US9806797B2 (en) 2011-04-29 2017-10-31 Corning Optical Communications LLC Systems, methods, and devices for increasing radio frequency (RF) power in distributed antenna systems
US9240835B2 (en) 2011-04-29 2016-01-19 Corning Optical Communications LLC Systems, methods, and devices for increasing radio frequency (RF) power in distributed antenna systems
US10148347B2 (en) 2011-04-29 2018-12-04 Corning Optical Communications LLC Systems, methods, and devices for increasing radio frequency (RF) power in distributed antenna systems
US9184843B2 (en) 2011-04-29 2015-11-10 Corning Optical Communications LLC Determining propagation delay of communications in distributed antenna systems, and related components, systems, and methods
US9369222B2 (en) 2011-04-29 2016-06-14 Corning Optical Communications LLC Determining propagation delay of communications in distributed antenna systems, and related components, systems, and methods
US9807722B2 (en) 2011-04-29 2017-10-31 Corning Optical Communications LLC Determining propagation delay of communications in distributed antenna systems, and related components, systems, and methods
US9258052B2 (en) 2012-03-30 2016-02-09 Corning Optical Communications LLC Reducing location-dependent interference in distributed antenna systems operating in multiple-input, multiple-output (MIMO) configuration, and related components, systems, and methods
US9813127B2 (en) 2012-03-30 2017-11-07 Corning Optical Communications LLC Reducing location-dependent interference in distributed antenna systems operating in multiple-input, multiple-output (MIMO) configuration, and related components, systems, and methods
US10136200B2 (en) 2012-04-25 2018-11-20 Corning Optical Communications LLC Distributed antenna system architectures
US9621293B2 (en) 2012-08-07 2017-04-11 Corning Optical Communications Wireless Ltd Distribution of time-division multiplexed (TDM) management services in a distributed antenna system, and related components, systems, and methods
US9973968B2 (en) 2012-08-07 2018-05-15 Corning Optical Communications Wireless Ltd Distribution of time-division multiplexed (TDM) management services in a distributed antenna system, and related components, systems, and methods
US9455784B2 (en) 2012-10-31 2016-09-27 Corning Optical Communications Wireless Ltd Deployable wireless infrastructures and methods of deploying wireless infrastructures
US9531452B2 (en) 2012-11-29 2016-12-27 Corning Optical Communications LLC Hybrid intra-cell / inter-cell remote unit antenna bonding in multiple-input, multiple-output (MIMO) distributed antenna systems (DASs)
US9647758B2 (en) 2012-11-30 2017-05-09 Corning Optical Communications Wireless Ltd Cabling connectivity monitoring and verification
US9974074B2 (en) 2013-06-12 2018-05-15 Corning Optical Communications Wireless Ltd Time-division duplexing (TDD) in distributed communications systems, including distributed antenna systems (DASs)
US9715157B2 (en) 2013-06-12 2017-07-25 Corning Optical Communications Wireless Ltd Voltage controlled optical directional coupler
US9526020B2 (en) 2013-07-23 2016-12-20 Corning Optical Communications Wireless Ltd Monitoring non-supported wireless spectrum within coverage areas of distributed antenna systems (DASs)
US9967754B2 (en) 2013-07-23 2018-05-08 Corning Optical Communications Wireless Ltd Monitoring non-supported wireless spectrum within coverage areas of distributed antenna systems (DASs)
US10292056B2 (en) 2013-07-23 2019-05-14 Corning Optical Communications LLC Monitoring non-supported wireless spectrum within coverage areas of distributed antenna systems (DASs)
US9247543B2 (en) 2013-07-23 2016-01-26 Corning Optical Communications Wireless Ltd Monitoring non-supported wireless spectrum within coverage areas of distributed antenna systems (DASs)
US9661781B2 (en) 2013-07-31 2017-05-23 Corning Optical Communications Wireless Ltd Remote units for distributed communication systems and related installation methods and apparatuses
US9385810B2 (en) 2013-09-30 2016-07-05 Corning Optical Communications Wireless Ltd Connection mapping in distributed communication systems
US9178635B2 (en) 2014-01-03 2015-11-03 Corning Optical Communications Wireless Ltd Separation of communication signal sub-bands in distributed antenna systems (DASs) to reduce interference
US9775123B2 (en) 2014-03-28 2017-09-26 Corning Optical Communications Wireless Ltd. Individualized gain control of uplink paths in remote units in a distributed antenna system (DAS) based on individual remote unit contribution to combined uplink power
US9357551B2 (en) 2014-05-30 2016-05-31 Corning Optical Communications Wireless Ltd Systems and methods for simultaneous sampling of serial digital data streams from multiple analog-to-digital converters (ADCS), including in distributed antenna systems
US9807772B2 (en) 2014-05-30 2017-10-31 Corning Optical Communications Wireless Ltd. Systems and methods for simultaneous sampling of serial digital data streams from multiple analog-to-digital converters (ADCs), including in distributed antenna systems
US9929786B2 (en) 2014-07-30 2018-03-27 Corning Incorporated Reducing location-dependent destructive interference in distributed antenna systems (DASS) operating in multiple-input, multiple-output (MIMO) configuration, and related components, systems, and methods
US9525472B2 (en) 2014-07-30 2016-12-20 Corning Incorporated Reducing location-dependent destructive interference in distributed antenna systems (DASS) operating in multiple-input, multiple-output (MIMO) configuration, and related components, systems, and methods
US10256879B2 (en) 2014-07-30 2019-04-09 Corning Incorporated Reducing location-dependent destructive interference in distributed antenna systems (DASS) operating in multiple-input, multiple-output (MIMO) configuration, and related components, systems, and methods
US9730228B2 (en) 2014-08-29 2017-08-08 Corning Optical Communications Wireless Ltd Individualized gain control of remote uplink band paths in a remote unit in a distributed antenna system (DAS), based on combined uplink power level in the remote unit
US9929810B2 (en) 2014-09-24 2018-03-27 Corning Optical Communications Wireless Ltd Flexible head-end chassis supporting automatic identification and interconnection of radio interface modules and optical interface modules in an optical fiber-based distributed antenna system (DAS)
US9602210B2 (en) 2014-09-24 2017-03-21 Corning Optical Communications Wireless Ltd Flexible head-end chassis supporting automatic identification and interconnection of radio interface modules and optical interface modules in an optical fiber-based distributed antenna system (DAS)
US9788279B2 (en) 2014-09-25 2017-10-10 Corning Optical Communications Wireless Ltd System-wide uplink band gain control in a distributed antenna system (DAS), based on per-band gain control of remote uplink paths in remote units
US9420542B2 (en) 2014-09-25 2016-08-16 Corning Optical Communications Wireless Ltd System-wide uplink band gain control in a distributed antenna system (DAS), based on per band gain control of remote uplink paths in remote units
US10096909B2 (en) 2014-11-03 2018-10-09 Corning Optical Communications Wireless Ltd. Multi-band monopole planar antennas configured to facilitate improved radio frequency (RF) isolation in multiple-input multiple-output (MIMO) antenna arrangement
US10135533B2 (en) 2014-11-13 2018-11-20 Corning Optical Communications Wireless Ltd Analog distributed antenna systems (DASS) supporting distribution of digital communications signals interfaced from a digital signal source and analog radio frequency (RF) communications signals
US10135561B2 (en) 2014-12-11 2018-11-20 Corning Optical Communications Wireless Ltd Multiplexing two separate optical links with the same wavelength using asymmetric combining and splitting
US9729267B2 (en) 2014-12-11 2017-08-08 Corning Optical Communications Wireless Ltd Multiplexing two separate optical links with the same wavelength using asymmetric combining and splitting
US10187151B2 (en) 2014-12-18 2019-01-22 Corning Optical Communications Wireless Ltd Digital-analog interface modules (DAIMs) for flexibly distributing digital and/or analog communications signals in wide-area analog distributed antenna systems (DASs)
US10110308B2 (en) 2014-12-18 2018-10-23 Corning Optical Communications Wireless Ltd Digital interface modules (DIMs) for flexibly distributing digital and/or analog communications signals in wide-area analog distributed antenna systems (DASs)
US10292114B2 (en) 2015-02-19 2019-05-14 Corning Optical Communications LLC Offsetting unwanted downlink interference signals in an uplink path in a distributed antenna system (DAS)
US9807700B2 (en) 2015-02-19 2017-10-31 Corning Optical Communications Wireless Ltd Offsetting unwanted downlink interference signals in an uplink path in a distributed antenna system (DAS)
US9681313B2 (en) 2015-04-15 2017-06-13 Corning Optical Communications Wireless Ltd Optimizing remote antenna unit performance using an alternative data channel
US10009094B2 (en) 2015-04-15 2018-06-26 Corning Optical Communications Wireless Ltd Optimizing remote antenna unit performance using an alternative data channel
US9948349B2 (en) 2015-07-17 2018-04-17 Corning Optical Communications Wireless Ltd IOT automation and data collection system
US10236924B2 (en) 2016-03-31 2019-03-19 Corning Optical Communications Wireless Ltd Reducing out-of-channel noise in a wireless distribution system (WDS)

Similar Documents

Publication Publication Date Title
US7058966B2 (en) Optical communication system for transmitting RF signals downstream and bidirectional telephony signals which also include RF control signals upstream
US5987303A (en) Wireless transmission using fiber link
CN1290358C (en) Network and method for connecting antennas to base stations in a wireless communication network using space diversity
EP0944990B1 (en) Cellular system with optical link between mobile telephone switching office and cell sites
EP0476569B1 (en) Mobile communication system
EP0952751B1 (en) Multimode service radio communication method and apparatus
US4337376A (en) Communications system and network
US4621282A (en) Transmitting stereo audio programs in cable TV systems
US4781427A (en) Active star centered fiber optic local area network
US5519691A (en) Arrangement for and method of providing radio frequency access to a switching system
JP2956981B2 (en) Communications system
JP3406527B2 (en) Service area expansion optical repeater system for the
EP0282347A2 (en) Low-power multi-function cellular television system
US6480702B1 (en) Apparatus and method for distributing wireless communications signals to remote cellular antennas
CA2061041C (en) Optical communications systems for the subscriber area with optical amplifiers
US5802173A (en) Radiotelephony system
US7072586B2 (en) Radio base station system and central control station with unified transmission format
US5777769A (en) Device and method for providing high speed data transfer through a drop line of a power line carrier communication system
JP4394166B2 (en) Received synchronization optical signal, modulated telecommunications system
US8984565B2 (en) Intelligent device system and method for distribution of digital signals on a wideband signal distribution system
KR930006453B1 (en) Optical fiber microcellular mobile radio
EP1250018A1 (en) Wireless base station network system, control station, base station switching method, signal processing method, and handover control method
KR101135935B1 (en) Distributed digital antenna system
CN1077362C (en) Method for realizing frequency hopping and base station equipment
US6336042B1 (en) Reverse link antenna diversity in a wireless telephony system