JPH07273707A - Radio repeating system - Google Patents
Radio repeating systemInfo
- Publication number
- JPH07273707A JPH07273707A JP8106794A JP8106794A JPH07273707A JP H07273707 A JPH07273707 A JP H07273707A JP 8106794 A JP8106794 A JP 8106794A JP 8106794 A JP8106794 A JP 8106794A JP H07273707 A JPH07273707 A JP H07273707A
- Authority
- JP
- Japan
- Prior art keywords
- line
- regenerative
- relay
- station
- switching device
- 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.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/155—Ground-based stations
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Radio Relay Systems (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、再生、非再生中継が混
在して信号の中継伝送を行うハイブリッド中継方式に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hybrid relay system in which regenerative and non-regenerative relaying are mixed to relay and transmit signals.
【０００２】[0002]
【従来の技術】ハイブリッド中継方式についての従来の
技術としては、本出願人による特願平４−２９６６６１
及び特願平４−２９６６６２があり、受信端局は再生中
継方式、中間中継所は非再生中継方式のごとく、再生中
継と非再生中継が混在する。2. Description of the Related Art As a conventional technique for a hybrid relay system, Japanese Patent Application No. 4-296661 by the present applicant is known.
There is a Japanese Patent Application No. 4-296662, in which the receiving terminal station is a regenerative relay system and the intermediate relay station is a non-regenerative relay system.
【０００３】図３は、従来の実施例として、１非再生中
継２ホップの中継構成、かつ予備回線１つ、現用回線１
つの回線構成を例として示す。送信端局１０３において
データ入力端子１から入力した信号は、回線切替え装置
（送信部）２に入力される。通常、現用装置１０２から
伝送される現用回線の伝送品質が劣化していない場合、
回線切替え装置（送信部）２に入力した信号は現用装置
１０２と接続され、予備装置１０１には疑似信号が入力
される。予備装置１０１、現用装置１０２、に入力した
信号はそれぞれ変調装置３、送信装置４を経て、合波器
５により予備回線と現用回線との信号が周波数軸上で合
波され送信アンテナ６から非再生中継局１０４に送信す
る。FIG. 3 shows, as a conventional example, one non-regenerative relay, two-hop relay configuration, one backup line, and one working line.
One line configuration is shown as an example. The signal input from the data input terminal 1 in the transmission terminal station 103 is input to the line switching device (transmission unit) 2. Normally, when the transmission quality of the working line transmitted from the working device 102 is not deteriorated,
A signal input to the line switching device (transmission unit) 2 is connected to the active device 102, and a pseudo signal is input to the backup device 101. The signals input to the backup device 101 and the working device 102 are respectively passed through the modulator 3 and the transmitter 4, and the multiplexer 5 combines the signals of the backup line and the working line on the frequency axis and the non-transmitted signal from the transmission antenna 6. It is transmitted to the reproduction relay station 104.
【０００４】非再生中継局１０４の受信アンテナ６’で
受信した信号は、分波器７により、予備回線と現用回線
との信号に周波数軸上で分波された後、予備装置１０
１’、現用装置１０２’に入力する。予備装置１０
１’、現用装置１０２’に入力した信号は、それぞれ受
信装置８、送信装置４を経て、合波器５により予備回線
と現用回線との信号が周波数軸上で合波され、送信アン
テナ６から受信端局１０５に送信する。The signal received by the receiving antenna 6'of the non-regenerative repeater station 104 is demultiplexed by the demultiplexer 7 into the signals of the protection line and the working line on the frequency axis, and then the protection device 10
1 ', input to the active device 102'. Spare device 10
The signals input to 1'and the working device 102 'pass through the receiving device 8 and the transmitting device 4, respectively, and the multiplexer 5 combines the signals of the protection line and the working line on the frequency axis, and the signals are transmitted from the transmitting antenna 6. It transmits to the receiving terminal station 105.
【０００５】受信端局１０５の受信アンテナ６’で受信
した信号は、分波器７により予備回線と現用回線との信
号に周波数軸上で分波された後、予備装置１０１”、現
用装置１０２”に入力する。予備装置１０１”、現用装
置１０２”に入力した信号は、それぞれ受信装置８、復
調装置９を経て、回線切替え回路（受信部）１０に入力
する。回線切替え装置（送信部）２に入力した信号を現
用装置１０２に切替えていたことから、回線切替え装置
（受信部）１０では、現用装置１０２”の出力信号をデ
ータ出力端子１１に出力させ、予備装置１０１”の出力
信号は、回線切替え装置（受信部）１０で終端させる。The signal received by the receiving antenna 6'of the receiving terminal station 105 is demultiplexed on the frequency axis by the demultiplexer 7 into the signals of the protection line and the working line, and then the protection device 101 "and the working device 102. Enter in ". The signals input to the standby device 101 ″ and the active device 102 ″ are input to the line switching circuit (reception unit) 10 via the reception device 8 and the demodulation device 9, respectively. Since the signal input to the line switching device (transmission unit) 2 was switched to the active device 102, the line switching device (reception unit) 10 causes the output signal of the active device 102 ″ to be output to the data output terminal 11, and the backup is performed. The output signal of the device 101 ″ is terminated by the line switching device (reception unit) 10.
【０００６】尚、送信端局１０３と非再生中継局１０４
との間の伝搬路あるいは、非再生中継局１０４と受信端
局１０５との間の伝搬路において伝搬路変動（フェージ
ング）が発生し、現用回線の伝送品質が著しく低下し、
一方、この状態において予備回線は、周波数選択性フェ
ージングの影響で伝送品質の劣化を免れた場合、回線切
替え装置（送信部）２では、データ入力端子１から入力
した信号を、予備装置１０１にも入力させる。これをう
け、回線切替え装置（受信部）１０では、予備装置１０
１”の出力信号をデータ出力端子１１に出力させ、現用
装置１０２”の出力信号は、回線切替え装置（受信部）
１０で終端させることにより、周波数選択性フェージン
グに対する伝送品質の劣化を救済する。The transmitting terminal station 103 and the non-regenerating relay station 104
, Or a propagation path between the non-regenerative relay station 104 and the receiving terminal station 105 causes propagation path fluctuation (fading), which significantly reduces the transmission quality of the working line.
On the other hand, in this state, when the protection line escapes from the deterioration of the transmission quality due to the influence of the frequency selective fading, the line switching device (transmission unit) 2 sends the signal input from the data input terminal 1 to the protection device 101 as well. Input. In response to this, the line switching device (reception unit) 10 uses the standby device 10
The output signal of 1 ″ is output to the data output terminal 11, and the output signal of the active device 102 ″ is the line switching device (reception unit).
By terminating at 10, the deterioration of transmission quality due to frequency selective fading is remedied.
【０００７】[0007]
【発明が解決しようとする課題】上述した従来の実施例
では、現用回線から予備回線に切り替わる場合、切り替
わる先の予備回線も現用回線と同様非再生中継されてい
るため、周波数選択性フェージングによる影響は軽減さ
れるものの、雑音が非再生中継のため相加され予備回線
に品質劣化が生じる欠点を有していた。In the above-mentioned conventional embodiment, when the working line is switched to the protection line, the protection line at the switching destination is also non-regeneratively relayed similarly to the working line, so that the influence of the frequency selective fading is exerted. However, it has a drawback that noise is added due to non-regenerative relaying and quality deterioration occurs on the protection line.
【０００８】本発明は、このような背景の下になされた
もので、ハイブリッド中継方式において予備回線の品質
の劣化、特にフェージング時に相加される雑音の影響を
なくすことを目的とする。The present invention has been made under such a background, and an object thereof is to eliminate the deterioration of the quality of the protection line in the hybrid relay system, particularly to eliminate the influence of noise added at the time of fading.
【０００９】[0009]
【課題を解決するための手段】上記目的を達成するため
の本発明の特徴は、入力信号を送信回線切替え装置によ
り現用回線と予備回線に切替え、各々を変調装置により
変調して送信する送信無線局と、受信した現用回線と予
備回線の各々を復調し、前記送信回線切替え装置に対応
して動作する受信回線切替え装置により現用回線と予備
回線の一方を選択し、信号を再生して出力する再生中継
無線局と、前記送信無線局と前記再生中継無線局の間に
配置され、受信信号を増幅し、受信信号の復調及び再生
をすることなく、送信する非再生中継装置を有する少な
くともひとつの非再生中継局とを有するハイブリッド中
継方式において、前記非再生中継局の少なくともひとつ
は、変調装置及び復調装置を有する再生中継装置を具備
し、前記非再生中継局内の非再生中継装置を通過する回
線の障害時に、前記送信切替え装置及び前記受信切替え
装置により、前記非再生中継局内の再生中継装置を通過
する回線に切替える無線中継方式にある。A feature of the present invention for achieving the above object is that a transmission radio that switches an input signal to a working line and a protection line by a transmission line switching device, modulates each by a modulator and transmits the modulated signal. The station, the received working line and the protection line are respectively demodulated, and one of the working line and the protection line is selected by the reception line switching device that operates corresponding to the transmission line switching device, and the signal is reproduced and output. At least one of a regeneration relay radio station and a non-regeneration relay device that is arranged between the transmission radio station and the regeneration relay radio station, amplifies the reception signal, and transmits the reception signal without demodulating and reproducing the reception signal. In a hybrid relay system having a non-regenerative relay station, at least one of the non-regenerative relay stations comprises a regenerative relay apparatus having a modulator and a demodulator, In case of a failure of the line passing through the non-regenerative relay device station, by the transmission switching device and the receiving switching device is in the radio relay system to switch to the line passing through the regeneration repeater of the non-regenerative repeater station.
【００１０】[0010]
【作用】上記構成において現用回線及び予備回線の一方
は再生中継を行う。フェージングのない場合には非再生
中継方式の現用回線を用いて通信する。フェージングの
発生時に予備回線に切替えると、現用回線と予備回線の
無線周波数が相違することから周波数選択性フェージン
グによる伝送品質の劣化が救済され、さらに、予備回線
が再生中継方式なので雑音の相加もない。In the above structure, one of the working line and the protection line is regeneratively relayed. When there is no fading, the non-regenerative repeater working line is used for communication. When switching to the protection line when fading occurs, deterioration of transmission quality due to frequency-selective fading is remedied because the radio frequencies of the working line and the protection line are different, and noise is added because the protection line is a regenerative repeater system. Absent.
【００１１】従って、本発明の上記目的が達成され、特
に、フェージングの発生時に優れた伝送品質を確保する
ことができる。Therefore, the above object of the present invention can be achieved, and particularly, excellent transmission quality can be secured when fading occurs.
【００１２】[0012]
【実施例】図１は、本発明の第１の実施例を説明する図
として、１中継２ホップの中継構成、かつ予備回線１
つ、現用回線１つの回線構成を例に示す。送信端局１０
３において、データ入力端子１から入力した信号は、回
線切替え装置（送信部）２に入力される。現用装置１０
２から伝送される現用回線の伝送品質が劣化していない
場合、回線切替え装置（送信部）２に入力した信号は、
現用装置１０２と接続され、予備装置１０１には疑似信
号が入力される。予備装置１０１、現用装置１０２に入
力した信号はそれぞれ変調装置３、送信装置４を経て、
分波器５により予備回線と現用回線との信号が周波数軸
上で合波され、送信アンテナ６から中継局１０４’に送
信する。DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a diagram for explaining the first embodiment of the present invention.
As an example, the line configuration of one working line is shown. Transmitting terminal 10
In 3, the signal input from the data input terminal 1 is input to the line switching device (transmission unit) 2. Working device 10
When the transmission quality of the working line transmitted from 2 is not deteriorated, the signal input to the line switching device (transmitting unit) 2 is
A pseudo signal is input to the standby device 101 by being connected to the active device 102. The signals input to the standby device 101 and the active device 102 pass through the modulator 3 and the transmitter 4, respectively,
The signals of the protection line and the working line are multiplexed on the frequency axis by the demultiplexer 5 and transmitted from the transmission antenna 6 to the relay station 104 ′.
【００１３】中継局１０４’の受信アンテナ６’で受信
した信号は、分波器７により予備装置１０６、現用装置
１０２’に入力する。予備装置１０６に入力した信号
は、受信装置８、復調装置９を経て、一端送信端局から
送られた信号を再生し、さらに変調装置３、送信装置４
を経て合波器５に入力する。現用装置１０２’に入力し
た信号は、受信装置８、送信装置４を経て合波器５に入
力する。合波器５では、予備装置１０６出力信号及び現
用装置１０２’出力信号が周波数軸上で合波され、送信
アンテナ６から受信端局１０５に送信する。The signal received by the receiving antenna 6'of the relay station 104 'is input to the backup device 106 and the active device 102' by the demultiplexer 7. The signal input to the backup device 106 passes through the receiving device 8 and the demodulating device 9, and once reproduces the signal sent from the transmitting terminal station, and further, the modulating device 3 and the transmitting device 4
And input to the multiplexer 5. The signal input to the active device 102 ′ is input to the multiplexer 5 via the receiving device 8 and the transmitting device 4. In the multiplexer 5, the output signal of the backup device 106 and the output signal of the active device 102 ′ are multiplexed on the frequency axis and transmitted from the transmitting antenna 6 to the receiving terminal station 105.
【００１４】受信端局１０５の受信アンテナ６’で受信
した信号は、分波器７により予備回線と現用回線との信
号に周波数軸上で分波された後、予備装置１０１”、現
用装置１０２”に入力する。予備装置１０１”、現用装
置１０２”に入力した信号は、それぞれ受信装置８、復
調装置９を経て、回線切替え回路（受信部）１０に入力
する。回線切替え装置（受信部）１０において回線切替
え装置（送信部）２に入力した信号を現用装置１０２に
切替えていたことから、回線切替え装置（受信部）１０
では、現用装置１０２”の出力信号をデータ出力端子１
１に出力させ、予備装置１０１”の出力信号は、回線切
替え装置（受信部）１０で終端させる。The signal received by the receiving antenna 6'of the receiving terminal station 105 is demultiplexed on the frequency axis by the demultiplexer 7 into the signals of the protection line and the working line, and then the protection device 101 "and the working device 102. Enter in ". The signals input to the standby device 101 ″ and the active device 102 ″ are input to the line switching circuit (reception unit) 10 via the reception device 8 and the demodulation device 9, respectively. Since the signal input to the line switching device (transmission unit) 2 was switched to the active device 102 in the line switching device (reception unit) 10, the line switching device (reception unit) 10
Then, the output signal of the active device 102 "is output to the data output terminal 1
1 and the output signal of the backup device 101 ″ is terminated by the line switching device (reception unit) 10.
【００１５】送信端局１０３と中継局１０４’との間の
伝搬路あるいは中継局１０４’と受信端局１０５との間
の伝搬路においてフェージングが発生し、現用回線の伝
送品質が著しく低下し、一方この状態において予備回線
は、周波数選択性フェージングの影響で伝送品質の劣化
を免れた場合、回線切替え装置（送信部）２では、デー
タ入力端子１から入力した信号を、予備装置１０１にも
入力させる。これをうけて、回線切替え装置（受信部）
１０では、予備装置１０１”の出力信号をデータ出力端
子１１に出力させ、現用装置１０２”の出力信号は、回
線切替え装置（受信部）１０で終端させる。尚、回線切
替えは通常無瞬断で行うため、中継局１０４’の予備装
置１０６と現用装置１０２との遅延時間差は、一例とし
て回線切替え装置（受信部）１０で補正する。Fading occurs in the propagation path between the transmitting terminal station 103 and the relay station 104 'or in the propagation path between the relay station 104' and the receiving terminal station 105, and the transmission quality of the working line is significantly deteriorated. On the other hand, in this state, when the protection line escapes from the deterioration of the transmission quality due to the effect of the frequency selective fading, the line switching device (transmission unit) 2 inputs the signal input from the data input terminal 1 to the protection device 101 as well. Let In response to this, the line switching device (reception unit)
In 10, the output signal of the standby device 101 ″ is output to the data output terminal 11, and the output signal of the active device 102 ″ is terminated by the line switching device (reception unit) 10. Since line switching is normally performed without interruption, the delay time difference between the backup device 106 of the relay station 104 ′ and the active device 102 is corrected by the line switching device (reception unit) 10 as an example.
【００１６】上記実施例において、受信端局１０５で再
生した信号をさらに変調して次局へ中継することも可能
である。In the above embodiment, the signal reproduced by the receiving terminal station 105 can be further modulated and relayed to the next station.
【００１７】又、中間中継局１０４’が複数存在する場
合には、予備回線に対する再生中継方式の適用を、全て
の中継局ではなく一部の中継局に対してのみ行うことも
可能である。When there are a plurality of intermediate relay stations 104 ', it is possible to apply the regenerative relay method to the protection line only to some relay stations instead of all relay stations.
【００１８】本発明の変形例として、予備装置１０７、
１０６’、１０８の変復調装置として、マルチキャリア
変調装置、及びマルチキャリア復調装置を用いることが
できる。マルチキャリア変調は、図２に示すように（１
つのマルチキャリアと３つのマルチキャリアの例）、１
つのシステムを複数のキャリアで変調する方法であり、
これにより耐フェージング特性、特に耐周波数選択性フ
ェージング（耐波形歪）特性にすぐれている。As a modification of the present invention, the backup device 107,
A multi-carrier modulation device and a multi-carrier demodulation device can be used as the modulation / demodulation devices 106 ′ and 108. Multicarrier modulation can be performed as shown in FIG.
Example of one multi-carrier and three multi-carriers), 1
Is a method of modulating one system with multiple carriers,
As a result, it has excellent anti-fading characteristics, particularly frequency selective fading (waveform distortion resistance) characteristics.
【００１９】[0019]
【発明の効果】以上説明したように、再生・非再生中継
が混在して信号の中継伝送を行うハイブリッド中継方式
において、非再生中継伝送している装置のうち予備装
置、予備回線を伝送する信号のみ再生中継伝送すること
により、伝送品質劣化時の現用回線を予備回線の再生中
継で救済することにより、大きな回線切替え効果を有す
ることができる。As described above, in the hybrid relay system in which regenerative / non-regenerative relays are mixed and the signal is relayed and transmitted, the signal transmitted through the standby device and the standby line among the devices that are non-regeneratively relayed and transmitted. By performing only the regenerative relay transmission, the working line when the transmission quality is deteriorated is relieved by the regenerative relay of the protection line, so that a large line switching effect can be obtained.
【図１】本発明の実施例を示すブロック図である。FIG. 1 is a block diagram showing an embodiment of the present invention.
【図２】マルチキャリアの変調の説明図である。FIG. 2 is an explanatory diagram of multicarrier modulation.
【図３】従来の技術を示すブロック図である。FIG. 3 is a block diagram showing a conventional technique.
１ データ入力端子 ２ 回線切替え装置（送信部） ３ 変調装置 ３’ マルチキャリア変調装置 ４ 送信装置 ５ 合波器 ６ 送信アンテナ ６’ 受信アンテナ ７ 分波器 ８ 受信装置 ９ 変調装置 ９’ マルチキャリア復調装置 １０ 回線切替え装置（受信部） １０１，１０１’，１０１” 予備装置 １０２，１０２’，１０２” 現用装置 １０３ 送信端局 １０４ 非再生中継局 １０４’ 中継局 １０５ 受信端局 １０６，１０７，１０８ 予備装置 1 data input terminal 2 line switching device (transmission unit) 3 modulation device 3'multicarrier modulation device 4 transmission device 5 multiplexer 6 transmission antenna 6'reception antenna 7 demultiplexer 8 reception device 9 modulation device 9'multicarrier demodulation Device 10 Line switching device (reception unit) 101, 101 ', 101 "Standby device 102, 102', 102" Working device 103 Transmitting terminal station 104 Non-regenerating relay station 104 'Relay station 105 Receiving terminal station 106, 107, 108 Spare apparatus
Claims (2)
用回線と予備回線に切替え、各々を変調装置により変調
して送信する送信無線局と、 受信した現用回線と予備回線の各々を復調し、前記送信
回線切替え装置に対応して動作する受信回線切替え装置
により現用回線と予備回線の一方を選択し、信号を再生
して出力する再生中継無線局と、 前記送信無線局と前記再生中継無線局の間に配置され、
受信信号を増幅し、受信信号の復調及び再生をすること
なく、送信する非再生中継装置を有する少なくともひと
つの非再生中継局とを有するハイブリッド中継方式にお
いて、 前記非再生中継局は変調装置及び復調装置を有する再生
中継装置を具備し、前記非再生中継局内の非再生中継装
置を通過する回線の障害時に、前記送信切替え装置及び
前記受信切替え装置により、前記非再生中継局内の再生
中継装置を通過する回線に切替えることを特徴とする無
線中継方式。1. A transmission radio station that switches an input signal to a working line and a protection line by a transmission line switching device, modulates each by a modulator and transmits, and demodulates each of the received working line and protection line, A regenerative relay wireless station that selects one of the working line and the protection line by the receiving line switching device that operates corresponding to the transmission line switching device, regenerates and outputs a signal, and the transmitting wireless station and the regenerating relay wireless station. Placed between
In a hybrid relay system having at least one non-regenerative relay station having a non-regenerative repeater that amplifies a received signal and transmits the received signal without demodulating and recovering, the non-regenerative repeater is a modulator and a demodulator. A regenerative repeater having a device, and when the line passing through the non-regenerative repeater in the non-regenerative repeater fails, the regenerative repeater in the non-regenerative repeater is passed by the transmission switching device and the reception switching device. A wireless relay system characterized by switching to a line that switches
それらのうちの一部の局の回線に前記再生中継装置がも
うけられる請求項１記載の無線中継方式。2. A plurality of non-regenerative relay stations are provided,
The wireless relay system according to claim 1, wherein the regeneration relay device is provided in a line of some of the stations.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8106794A JPH07273707A (en) | 1994-03-29 | 1994-03-29 | Radio repeating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8106794A JPH07273707A (en) | 1994-03-29 | 1994-03-29 | Radio repeating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07273707A true JPH07273707A (en) | 1995-10-20 |
Family
ID=13736055
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8106794A Withdrawn JPH07273707A (en) | 1994-03-29 | 1994-03-29 | Radio repeating system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07273707A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006090669A1 (en) * | 2005-02-22 | 2006-08-31 | Matsushita Electric Industrial Co., Ltd. | Radio communication method, relay station device, and radio receiver device |
| US7944871B2 (en) | 2005-04-28 | 2011-05-17 | Panasonic Corporation | Communication relay apparatus and communication relay method |
-
1994
- 1994-03-29 JP JP8106794A patent/JPH07273707A/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006090669A1 (en) * | 2005-02-22 | 2006-08-31 | Matsushita Electric Industrial Co., Ltd. | Radio communication method, relay station device, and radio receiver device |
| JPWO2006090669A1 (en) * | 2005-02-22 | 2008-07-24 | 松下電器産業株式会社 | Wireless communication method, relay station device, and wireless reception device |
| JP4637898B2 (en) * | 2005-02-22 | 2011-02-23 | パナソニック株式会社 | Wireless communication method, relay station device, and wireless reception device |
| US7929988B2 (en) | 2005-02-22 | 2011-04-19 | Panasonic Corporation | Radio reception apparatus and radio reception method |
| US8224238B2 (en) | 2005-02-22 | 2012-07-17 | Panasonic Corporation | Radio communication method, relay station device, and radio receiver device |
| US7944871B2 (en) | 2005-04-28 | 2011-05-17 | Panasonic Corporation | Communication relay apparatus and communication relay method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3693303B2 (en) | Multi-carrier frequency hopping communication system | |
| JP3875042B2 (en) | Interference cancellation system and interference cancellation method | |
| JPH1032557A (en) | Relay system, transmitter and repeater used for the same | |
| JP4611842B2 (en) | Repeater device | |
| KR101070516B1 (en) | Maximum diversity-multiplexing gain protocol and utilizing method for interference symbols in cooperative wireless communication | |
| JPH07273707A (en) | Radio repeating system | |
| JP2003332940A (en) | Mobile communication device | |
| JP2682345B2 (en) | Compensation system for cross polarization interference generated at non-regenerative wireless relay stations | |
| JPH0235848A (en) | Modulating method switching transmission system | |
| JP2845721B2 (en) | Wireless communication system | |
| US5940410A (en) | Method of transmitting data reliably over N normal channels, and over at least one back-up channel, and a transmit end station, a receive end station, and a relay station corresponding to the method | |
| JP2848161B2 (en) | Wireless communication system | |
| JPH05206893A (en) | Automatic changeover system for optical transmission system | |
| JPH0846579A (en) | Monitor control method for radio repeater station | |
| JP3865997B2 (en) | Wireless communication system | |
| JP2003264493A (en) | Radio repeater control circuit | |
| JP2795090B2 (en) | Apparatus and method for compensating interference signal generated in non-regenerative wireless relay station | |
| KR100962265B1 (en) | Cooperative transmission system in downlink communication | |
| JP2982024B2 (en) | Control signal transmission method | |
| JP2901459B2 (en) | Wireless transmission reserve method | |
| JPH098774A (en) | Digital radio communication equipment | |
| JP3208611B2 (en) | Same frequency wireless communication system | |
| JP2000115110A (en) | Multi-directional time division multiplex radio communication system | |
| JP2689904B2 (en) | Satellite communication system | |
| JP2000068977A (en) | Radio signal multiplex transmission method and radio signal multiplex transmission system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20010605 |