JPS5910624B2 - Wireless digital signal reception method - Google Patents
Wireless digital signal reception methodInfo
- Publication number
- JPS5910624B2 JPS5910624B2 JP53006951A JP695178A JPS5910624B2 JP S5910624 B2 JPS5910624 B2 JP S5910624B2 JP 53006951 A JP53006951 A JP 53006951A JP 695178 A JP695178 A JP 695178A JP S5910624 B2 JPS5910624 B2 JP S5910624B2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- circuit
- wired
- wireless
- receiving
- 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.)
- Expired
Links
- 238000000034 method Methods 0.000 title description 2
- 230000008054 signal transmission Effects 0.000 claims description 15
- 230000005684 electric field Effects 0.000 claims description 7
- 230000003321 amplification Effects 0.000 claims description 3
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims 4
- 230000015572 biosynthetic process Effects 0.000 description 5
- 238000003786 synthesis reaction Methods 0.000 description 5
- 238000001514 detection method Methods 0.000 description 3
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
- H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Radio Transmission System (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Description
【発明の詳細な説明】
本発明は移動無線局から送信されたディジタル信号を、
あるサービス・エリア内で確実に受信するための無線デ
ィジタル信号受信方式に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention enables digital signals transmitted from mobile radio stations to
The present invention relates to a wireless digital signal reception method for ensuring reliable reception within a certain service area.
従来、移動無線送信局１からの信号を広いサービス・エ
リア内で受信するために、第１図に示すようにそのサー
ビス・エリア内ＫＮ個の無線受信局２Ａ、２Ｂ、・・・
、２Ｎを配置することにより、そのラちで最も受信状態
の良好な局を回路３により判定し、その局の受信出力信
号を選択装置４により選択する受信装置が考えられてい
るが、無線受信局の数Ｎが増大すると最良の局を判定す
る回路３および選択装置４が複雑になり、さらにそれら
の装置と各受信局との接続が複雑になる欠点を有してい
る。Conventionally, in order to receive a signal from a mobile radio transmitting station 1 within a wide service area, KN radio receiving stations 2A, 2B, . . . within the service area are used as shown in FIG.
, 2N, the circuit 3 determines the station with the best reception condition among them, and the selection device 4 selects the reception output signal of that station. As the number N of stations increases, the circuit 3 and selection device 4 for determining the best station become more complex, and the connection between these devices and each receiving station becomes more complicated.
また、超短波、極超短波帯の電波を使用するときには多
重経路伝搬により、移動局のわずかな移動、あるいは反
射物体の移動により受信電界強度が大幅に変動するため
に、各無線信号受信局間の距離を短かくしなければなら
なかつた。Furthermore, when using radio waves in the ultra-high frequency band or ultra-high frequency band, due to multi-path propagation, the received electric field strength fluctuates significantly due to slight movement of the mobile station or movement of reflective objects, so the distance between each radio signal receiving station is had to be shortened.
本発明の目的は、上述の欠点を除いた無線ディジタル信
号受信装置を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a wireless digital signal receiving device that eliminates the above-mentioned drawbacks.
第２図に本発明の受信局を示す。第２図において、５は
受信局、６は無線受信機、Ｔは復調回路８は電界強度検
出回路、９は可変利得増幅回路、１０は信号合成回路、
１１は有線信号受信回路、１２は有線信号送信回路、１
３、１３’は有線信号伝送路である。電界強度検出回路
８は受信機６で受信した信号の電界強度を検出し、この
受信電界強度が一定値以下の時に、その受信電界強度に
応じて復調回路Ｔの出力を増幅する可変利得増幅回路９
を制御する。有線信号伝送路１３からの信号を受信する
有線信号受信回路１１の出力と可変利得増幅回路９の出
力とを加算合成する信号合成回路１０および信号合成回
路１０の出力を有線信号伝送路１３’へ送出する有線信
号送信回路１２を備えることにより第３図（後述する。
）に示すように単にＮ個の無線ディジタル信号受信局５
Ａ、５Ｂ、・・・５Ｎを有線信号伝送路により接続する
だけで、有線信号伝送路の一端に接続された有線信号受
信局１４では最も受信状態の良好な局の信号が受信され
、第１図に示した装置３、４が不要となり、装置全体の
構成ならびに接続が著しく簡単になる。さらに移動局が
移動することによつて多重経路伝搬による受信電界強度
の変動が生じても２局以上の局で信号が受信されている
場合には第４図（後述する。）に示すように各局での受
信電界強度の変動は互に無相関であるので、スペース・
ダイバーシテイ効果により合成された受信デイジタル信
号の信号対雑音比は常に良好なものとなり、第１図の装
置構成に比較して各無線デイジタル信号受信局間の距離
を長くすることが可能になり、同一のサービス・エリア
に対して無線デイジタル信号受信局の数が少なくてすむ
利点を有する。さらに本発明による無線デイジタル信号
受信装置では単に有線信号伝送路に新らたな受信局を接
続することにより、容易にサービス・エリアを拡張する
ことが可能である。第３図は本発明の受信局の接続例で
、Ｎ個の無線デイジタル信号受信局５Ａ，５Ｂ，・・・
５Ｎを有線信号伝送路により直線状に接続したもので各
局は第２図に示す構成をとつている。FIG. 2 shows a receiving station of the present invention. In FIG. 2, 5 is a receiving station, 6 is a radio receiver, T is a demodulation circuit 8 is a field strength detection circuit, 9 is a variable gain amplifier circuit, 10 is a signal synthesis circuit,
11 is a wired signal receiving circuit, 12 is a wired signal transmitting circuit, 1
3 and 13' are wired signal transmission lines. The electric field strength detection circuit 8 is a variable gain amplifier circuit that detects the electric field strength of the signal received by the receiver 6, and amplifies the output of the demodulation circuit T according to the received electric field strength when the received electric field strength is below a certain value. 9
control. A signal synthesis circuit 10 that adds and synthesizes the output of the wired signal receiving circuit 11 that receives the signal from the wired signal transmission line 13 and the output of the variable gain amplifier circuit 9 and the output of the signal synthesis circuit 10 are sent to the wired signal transmission line 13'. By providing a wired signal transmitting circuit 12 for transmitting signals, the signal transmission circuit shown in FIG. 3 (described later) is provided.
), there are simply N wireless digital signal receiving stations 5.
By simply connecting A, 5B, ... 5N through a wired signal transmission path, the wired signal receiving station 14 connected to one end of the wired signal transmission path receives the signal of the station with the best reception condition, and the first The devices 3 and 4 shown in the figure become unnecessary, and the configuration and connections of the entire device are significantly simplified. Furthermore, even if the received field strength fluctuates due to multipath propagation due to movement of the mobile station, if the signal is being received by two or more stations, as shown in Figure 4 (described later), Since fluctuations in the received field strength at each station are uncorrelated with each other, space
Due to the diversity effect, the signal-to-noise ratio of the combined received digital signal is always good, making it possible to increase the distance between each radio digital signal receiving station compared to the device configuration shown in FIG. This has the advantage that fewer wireless digital signal receiving stations are required for the same service area. Further, in the wireless digital signal receiving apparatus according to the present invention, the service area can be easily expanded by simply connecting a new receiving station to the wired signal transmission path. FIG. 3 shows a connection example of receiving stations according to the present invention, in which N wireless digital signal receiving stations 5A, 5B, . . .
5N are connected in a straight line through wired signal transmission lines, and each station has the configuration shown in FIG.
いま移動する無線送信局から送信された電波の受信電界
強度がＮ個の無線デイジタル信号受信局のうち５Ａでは
第４図ａのようにその変動が電界強度検出器８により検
出され、その出力により復調回路７の出力（第４図ｂ）
を増幅する可変利得増幅回路９を制御して有線信号伝送
路へは第４図ｃなる信号を送出する。＝方５Ｂでは受信
電界強度は第４図ａ″のように送出され、復調回路７の
出力（第４図ｄ）は第４図ｃｌのように制御され、信号
合成回路１０に加えられる。また有線信号伝送路の信号
（第４図ｃ）を有線信号受信回路により受信して、信号
合成回路１０に加える。その出力（第４図ｄ）は有線信
号送信回路１２により有線信号伝送路１３へ送出される
。他の受信局５Ｃ〜５Ｎでは無線送信局からの電波が受
信されなければ、この第４図ｄの信号は順次中継されて
、有線信号受信局１４で受信され、第４図ｅのごときデ
イジタル信号に整形される。第５図は本発明の受信局の
第２の接続例で、無線デイジタル信号受信局５Ａ〜５Ｎ
のうちいくつかのもの５Ｈ，５Ｎに複数個の有線信号受
信回路を備えることにより、樹枝状に接続したものであ
る。At 5 A of the N radio digital signal receiving stations, the received field strength of the radio wave transmitted from the currently moving radio transmitting station is detected by the field strength detector 8 as shown in FIG. Output of demodulation circuit 7 (Fig. 4b)
The variable gain amplifier circuit 9 that amplifies the signal is controlled to send out the signal shown in FIG. 4c to the wired signal transmission line. In the direction 5B, the received electric field strength is transmitted as shown in FIG. 4a'', and the output of the demodulation circuit 7 (FIG. 4d) is controlled as shown in FIG. The signal on the wired signal transmission line (Fig. 4c) is received by the wired signal receiving circuit and applied to the signal synthesis circuit 10.The output (Fig. 4d) is sent to the wired signal transmission line 13 by the wired signal transmission circuit 12. If the other receiving stations 5C to 5N do not receive the radio waves from the wireless transmitting station, the signals shown in FIG. FIG. 5 shows a second connection example of the receiving stations of the present invention, in which the wireless digital signal receiving stations 5A to 5N
Some of them 5H and 5N are provided with a plurality of wired signal receiving circuits to form a dendritic connection.
第１図は従来の受信方式例、第２図は本発明による無線
デイジタル信号受信局の構成例、第３図は本発明の受信
局の第１の接続例、第４図は第３図における各部の波形
、第５図は本発明の受信局の第２の接続例である。
図において、１・・・移動無線送信局、２Ａ〜２Ｎ，５
，５Ａ〜５Ｎ・・・無線受信局、３・・・最良局判定装
置、４・・選択装置、６・・・無線受信機、７・・・復
調回路、８・・電界強度検出回路、９・・・可変利得増
幅回路、１０・・・信号合成回路、１１・・・有線信号
受信回路、１２・・・有線信号送信回路、１３，１３（
・・有線信号伝送路、１４・・・有線信号受信局である
。FIG. 1 is an example of a conventional reception system, FIG. 2 is an example of the configuration of a wireless digital signal receiving station according to the present invention, FIG. 3 is a first connection example of a receiving station according to the present invention, and FIG. 4 is the same as in FIG. The waveforms of each part and FIG. 5 are a second connection example of the receiving station of the present invention. In the figure, 1... mobile radio transmitting station, 2A to 2N, 5
, 5A to 5N... Radio receiving station, 3... Best station determining device, 4... Selection device, 6... Radio receiver, 7... Demodulation circuit, 8... Field strength detection circuit, 9 ... variable gain amplification circuit, 10 ... signal synthesis circuit, 11 ... wired signal reception circuit, 12 ... wired signal transmission circuit, 13, 13 (
. . . Wired signal transmission line, 14 . . . Wired signal receiving station.
Claims (1)
線送信局からの無線ディジタル信号を受信し有線伝送路
を有する複数の無線受信局と、前記無線受信局のいずれ
かから信号を有線伝送路を介して受信する有線信号受信
局とを含み、前記無線受信局が、前記無線ディジタル信
号の受信の電界強度に応じて復調出力の振巾を制御する
可変利得増巾回路と、他の前記無線受信局からの信号を
前記有線伝送路を介して受信する有線信号受信回路と前
記増巾回路の出力と前記有線信号受信回路との出力とを
合成する信号合成回路と、前記信号合成回路の出力を前
記有線伝送路に送出する有線信号送信回路とを含むこと
を特徴とする無線ディジタル信号受信方式。1 A wireless transmitting station that moves within a wireless zone, a plurality of wireless receiving stations that receive wireless digital signals from the mobile wireless transmitting station and have wired transmission paths, and transmit signals from any of the wireless receiving stations to the wired transmission path. a variable gain amplification circuit for controlling the amplitude of demodulated output according to the electric field strength of reception of the wireless digital signal; a wired signal receiving circuit that receives a signal from a receiving station via the wired transmission line; a signal combining circuit that combines the output of the amplification circuit with the output of the wired signal receiving circuit; and an output of the signal combining circuit. a wired signal transmission circuit that transmits a signal to the wired transmission path.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP53006951A JPS5910624B2 (en) | 1978-01-24 | 1978-01-24 | Wireless digital signal reception method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP53006951A JPS5910624B2 (en) | 1978-01-24 | 1978-01-24 | Wireless digital signal reception method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS54100206A JPS54100206A (en) | 1979-08-07 |
| JPS5910624B2 true JPS5910624B2 (en) | 1984-03-10 |
Family
ID=11652526
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP53006951A Expired JPS5910624B2 (en) | 1978-01-24 | 1978-01-24 | Wireless digital signal reception method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5910624B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60133917U (en) * | 1984-02-15 | 1985-09-06 | 大内 義孝 | bag |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2774827B2 (en) * | 1989-08-14 | 1998-07-09 | 日本電信電話株式会社 | Base station reception method |
| JP4102692B2 (en) | 2003-03-25 | 2008-06-18 | 富士通株式会社 | Radio base station apparatus and base station control apparatus |
| WO2007046183A1 (en) * | 2005-10-18 | 2007-04-26 | Nec Corporation | Wireless communication system, wireless base station, and wireless communication method |
-
1978
- 1978-01-24 JP JP53006951A patent/JPS5910624B2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60133917U (en) * | 1984-02-15 | 1985-09-06 | 大内 義孝 | bag |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS54100206A (en) | 1979-08-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5613219A (en) | Transceiver having plural antennas and adjusting the time delay of transmitted signals to match the time delay of received signals | |
| US5924022A (en) | RF repeater for TDMA mobile telephone systems | |
| GB2315645B (en) | Diversity gain controlled cell-site transmission | |
| JPH0338932A (en) | Space diversity system | |
| EP0350007A2 (en) | Diversity antenna communication system | |
| JPH08265250A (en) | Satellite communication equipment for mobile object | |
| JPS5910624B2 (en) | Wireless digital signal reception method | |
| JPH10313472A (en) | Wireless base station device and wireless terminal device | |
| US5867792A (en) | Radio communication system | |
| JP4063385B2 (en) | Wireless relay device | |
| US7817975B2 (en) | Wireless communication system, wireless communication terminal, and wireless communication method | |
| JP3406980B2 (en) | Diversity communication device | |
| JPH07245577A (en) | Diversity communication device | |
| JP5225140B2 (en) | Mobile station and radio communication system | |
| JP2000353998A (en) | Diversity receiver and diversity transmitter | |
| JP3877930B2 (en) | Wireless communication system | |
| JPH01288023A (en) | Millimeter wave private branch radio communication system | |
| JPH10163937A (en) | Antenna switching control method | |
| JPH01142478A (en) | Secondary radiation suppression circuit by side band antenna | |
| JPS5850061B2 (en) | communication facilities | |
| JP2666854B2 (en) | Diversity method | |
| JPH02291732A (en) | Dispersed reception system for mobile communication system | |
| KR100597867B1 (en) | Receiving device in mobile communication system | |
| JP3303052B2 (en) | Digital wireless communication method | |
| JPH11168422A (en) | Wireless repeater |