JPS6172421A - Diversity receiver - Google Patents
Diversity receiverInfo
- Publication number
- JPS6172421A JPS6172421A JP19502684A JP19502684A JPS6172421A JP S6172421 A JPS6172421 A JP S6172421A JP 19502684 A JP19502684 A JP 19502684A JP 19502684 A JP19502684 A JP 19502684A JP S6172421 A JPS6172421 A JP S6172421A
- Authority
- JP
- Japan
- Prior art keywords
- antenna
- receiver
- input
- receivers
- reception
- 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
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0802—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection
- H04B7/0817—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection with multiple receivers and antenna path selection
- H04B7/082—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection with multiple receivers and antenna path selection selecting best antenna path
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0802—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection
- H04B7/0805—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection with single receiver and antenna switching
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Radio Transmission System (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、移動無線通信の基地局や分散配置された固定
端末の加入者を扱う地域通信の基地局等に使用されるダ
イバーシチ受信装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a diversity receiving device used in mobile radio communication base stations and regional communication base stations that handle distributed fixed terminal subscribers. be.
従来例の構成とその問題点
移動通信、特に携帯無線電話ではそのアンテナ実効放射
電力（ＥＲＰ ）は基地局無線出力に対して大分小さい
ため、基地局送信を焦損性アンテナを使用し、基地受信
には複数の指向性アンテナを各異なる方向に向けて設置
して受信し、上り回線Ｓ／Ｎ比の改善を行なわせている
。これらアンテナを使用する場合は各アンテナの受信レ
ベルの時間的平均値が通信に必要な値以上の内で最大レ
ベルのアンテナを選択して通話受信機と接続するもので
、いわゆるダイバーシチ受信を行ない上り（移動→基地
）、下り（基地→移動）の通話品質のバランスを得るよ
うにレベル構成されている。Conventional configurations and their problems In mobile communications, especially mobile radio telephones, the antenna effective radiated power (ERP) is much smaller than the radio output of the base station, so a focal antenna is used for base station transmission, and base reception is In order to improve the uplink S/N ratio, multiple directional antennas are installed facing different directions for reception. When using these antennas, the antenna with the highest level is selected within the time average value of the reception level of each antenna, which is higher than the value required for communication, and is connected to the call receiver, so-called diversity reception is performed. The levels are configured to provide a balance between call quality (mobile → base) and downlink (base → mobile).
これは水平面パターンが指向性を有するアンテナを用い
た場合に移動局がアンテナ指向性の主方向からずれた方
向に移動する場合には徐々に受信入力が低下し、これに
伴ってＳ／Ｎ比が劣化してついには通話不能となるもの
である。基地局指向性アンテナの利得はある角度内は最
大利得で、前記角度を越えたならば利得が全く無くなる
のでなく、徐々に利得が低下するものであるから所定レ
ベル利得が低下した点に隣接アンテナの利得が得られる
ように利得が所定レベルで重複するように設定しておき
、受信レベルが常に大きい方のアンテナを使って受信す
るものである。This is because when using an antenna with a directional horizontal pattern, when the mobile station moves in a direction that deviates from the main direction of the antenna directivity, the reception input gradually decreases, and the S/N ratio decreases accordingly. It deteriorates and eventually it becomes impossible to make a call. The gain of a base station directional antenna is maximum within a certain angle, and once the angle is exceeded, the gain does not disappear at all, but rather gradually decreases. Therefore, at the point where the gain has decreased by a certain level, the adjacent antenna The gains are set so that they overlap at a predetermined level so that a gain of
上述のようなアンテナと受信機との接続および切替は平
均受信レベルが所定値以上のアンテナに接続された２台
以上の受信機の信号出力をそれら受信機の瞬時レベルに
従って切替える、いわゆる切替ダイバーシチ受信が使用
される。The connection and switching between antennas and receivers as described above is a so-called switching diversity reception in which the signal outputs of two or more receivers connected to an antenna whose average reception level is above a predetermined value are switched according to the instantaneous levels of those receivers. is used.
いま、無指向性アンテナによるサービスエリアを指向性
利得の半値幅が６０℃６個のアンテナで、、
全方向をカバーさせ、これらのアンテナを２台の通話受
信機に接続したダイバーシチ受信方式があるが、移動通
信の受信レベルは自動車の移動速度や移動方向によるが
数Ｈｚ〜数１０Ｈｚ の変化がありためできるだけ平均
レベルが犬きくで同じようなレベルの２基以上のアンテ
ナに受信機を接続してダイバーシチ受信をする必要があ
るが、２台の内の１台を受信に使用し、他の１台でアン
テナのサーチを行なう場合はダイバーシチによるＳ／Ｎ
比の改善が得られないため、１台の受信機で他のアンテ
ナをサーチ中に通話中の受信機のＳ／Ｎが劣化して通話
が中断されるという問題があった。Now, the service area of omnidirectional antennas is covered by six antennas with a directional gain half-width of 60 degrees Celsius.
There is a diversity reception method that covers all directions and connects these antennas to two call receivers, but the reception level of mobile communications varies by several Hz to several tens of Hz, depending on the speed and direction of movement of the car. Therefore, it is necessary to perform diversity reception by connecting the receiver to two or more antennas with similar average levels as much as possible, but one of the two antennas is used for reception, and the other When searching for antennas on the unit, S/N by diversity
Since the ratio cannot be improved, there is a problem in that while one receiver is searching for another antenna, the S/N of the receiver during a call deteriorates and the call is interrupted.
発明の目的
本発明は上記従来例の欠点を除去し、２台の受信機によ
り常にダイバーシチ受信を行なう一方で、残りの一台の
受信機を利用してより高出力なアンテナを探すことによ
り、より良好な受信を可能とするダイバーシチ受信装置
を提供することを目的とするものである。Purpose of the Invention The present invention eliminates the drawbacks of the conventional example described above, and while always performing diversity reception with two receivers, uses the remaining receiver to search for a higher output antenna. It is an object of the present invention to provide a diversity receiving device that enables better reception.
発明の構成
本発明は上記目的を達成するために、複数の指向性アン
テナをアンテナ切替スイッチを介して３台の受信機に接
続し、常時上位アンテナに接続された２台の受信機でダ
イバーシチ受信を行なうと共に、第３位の受信機を用い
て非接続の指向性アンテナのサーチを行ない、前記上位
２台の受信入力よりも大きい入力がある指向性アンテナ
が見付かると、前記２台の受信機に接続されたアンテナ
と接続替えを行なうように構成したものである。Structure of the Invention In order to achieve the above object, the present invention connects a plurality of directional antennas to three receivers via an antenna changeover switch, and performs diversity reception with two receivers that are always connected to the upper antenna. At the same time, the third-ranked receiver is used to search for unconnected directional antennas, and if a directional antenna with a reception input larger than that of the top two receivers is found, the two receivers The antenna is configured so that the connection can be changed between the antenna and the antenna connected to the antenna.
実施例の説明
以下に本発明の一実施例の構成およびアンテナ切替の方
法について説明する。DESCRIPTION OF EMBODIMENTS The configuration and antenna switching method of an embodiment of the present invention will be described below.
第１図は本発明に用いるＮチャネルのダイバーシチ受信
装置の構成を示しており、Ａ１．Ａ２・・・・・・Ａ６
は利得半値幅が６０’以上の６基の指向性アンテナ、Ｃ
Ａ１．ＣＡ２・・・・・・ＣＡｅ／′ｉ、各アンテナ入
力の共通増幅器、Ｄｌ、Ｄ２・・・・・Ｄ６は各共通増
幅器、ＣＡ、、 ＣＡ、・・・・ＣＡ６の出力をこの基
地局で使用する全受信機に分配する高周波分配器、ＳＡ
、 ＳＢ・・・・・・・・・ＳＮは全受信機ｎ台のア
ンテナ切替スイッチ、ＲＡ、 ＲＢ ・・・・・ＲＮは
この基地局で使用する各通信チャネルの受信機群で各３
台の受信機１（Ｒｘ１）、受信機２ （ＲＮ２ ）、受
信機３（Ｒｘｓ）から構成される。ＩＡ、ＩＢ、・・・
・・・ＩＮは各受信機の瞬時受信レベルの比較器、ＢＡ
、 ＢＢ・・・・・ＢＮは各チャネルのボーチング装
置、ＮＡ、ＭＢ・・・・・・ＭＮは各受信機の平均受信
レベルの比較部、ＣＡ、ＣＢ・・・・・・ＣＮは各チャ
ネルのアンテナ切替スイッチＳＡ、ＳＢ・・・・・・・
・・ＳＮの制御部である。FIG. 1 shows the configuration of an N-channel diversity receiving apparatus used in the present invention. A2...A6
is six directional antennas with a gain half width of 60' or more, C
A1. CA2...CAe/'i, common amplifier for each antenna input, Dl, D2...D6, output from each common amplifier, CA, CA,...CA6 at this base station. High frequency distributor, SA that distributes to all receivers used
, SB......SN is the antenna selection switch for all n receivers, RA, RB...RN is the receiver group for each communication channel used in this base station, each with three receivers.
It consists of receiver 1 (Rx1), receiver 2 (RN2), and receiver 3 (Rxs). IA, IB,...
...IN is a comparator for the instantaneous reception level of each receiver, BA
, BB...BN is a voting device for each channel, NA, MB...MN is a comparison unit for the average reception level of each receiver, CA, CB...CN is a unit for each channel. Antenna selector switch SA, SB...
...This is the control section of the SN.
次に、各部の機能および動作についてチャネルＡについ
て説明する。最初に待受は時には、チャネルＡの受信機
、Ｒｘ１．ＲＮ２ 、ＲＮ３は第２Ａ図及び第２Ｂ図に
示すように時間の経過ｔ１〜ｔ４に対応して、斜線部と
非斜線部を交互に切替えてアンテナ切替を行ないながら
受信し続ける。これはアンテナ切替スイッチＳＡと３台
の受信機により６基のアンテナ入力を時分割受信により
切替えて待受は受信する方法が用いられる。Next, the functions and operations of each part will be explained for channel A. Initially the standby is sometimes at the receiver of channel A, Rx1. As shown in FIGS. 2A and 2B, RN2 and RN3 continue to receive data while alternately switching antennas between the hatched area and the non-hatched area in response to the passage of time t1 to t4, as shown in FIGS. 2A and 2B. This method uses an antenna changeover switch SA and three receivers to switch six antenna inputs by time-division reception, and receives the standby signal.
第１の状態（１１，１３）では、受信機Ｒｘ１は５ａ１
−Ｄｌ−Ａ１、受信機Ｒｘ２は５ａ３−Ｄ３−Ａ３、受
信機Ｒｘｓは５ａ５−Ｄ５−Ａ６、直接的な表現をすれ
ば、受信機Ｒｘ１をアンテナＡ１ に、受信機Ｒ×２を
アンテナＡ３に、受信機Ｒｘ３をアンテナＡ６に接続し
て監視する。Ｓａ１〜Ｓａ６はそれぞれＤ１〜Ｄ６に接
続されるスイッチＳＡの入力端子である。In the first state (11, 13), the receiver Rx1 is 5a1
-Dl-A1, receiver Rx2 is 5a3-D3-A3, receiver Rxs is 5a5-D5-A6, in direct expression, receiver Rx1 is connected to antenna A1, receiver Rx2 is connected to antenna A3. , receiver Rx3 is connected to antenna A6 for monitoring. Sa1-Sa6 are input terminals of switch SA connected to D1-D6, respectively.
次に、第２の状態（１２，１４）では受信機Ｒ×１をＡ
２に、受信機Ｒｘ２をＡ４に、受信機Ｒｘ３を八〇に接
続して受信する。これを交互に繰返しながら全方向どの
方向からの受信にも対応可能にしている。Next, in the second state (12, 14), the receiver R×1 is set to A
2, connect receiver Rx2 to A4 and receiver Rx3 to 80 for reception. By repeating this process alternately, it is possible to handle reception from any direction.
第３図は本発明の受信制御フローチャートを示すもので
あり、制御部ＣＡでの制御動作を第３図を用いて説明す
る。制御フローがスタートし、ステップ１で６方向のア
ンテナ入力は前記のように第１の状態でアンテナＡ１．
Ａ３．Ａ５を、第２の状態ではＡ２．Ａ４．Ａ６の受信
レベルを検出する。ステップ２で受信入力の有無が検出
され、（Ｙ）入力の無い時はアンテナ切替動作を続ける
。他方、入力を検出した時（Ｎ）ではステップ３の判定
に進み、入力が１つか、１つ以上かを検出する。１Ｊ
′（ｙ ）の時は３テ・プ４に進み１・２つ
以上のときはステップ５の判定に従かう。いま、入力が
アンテナＡ１に得られた場合はアンテナＡ１ の両側の
アンテナＡ２．八〇を受信機に接続する。第２図からア
ンテナＡ１ には受信機Ｒｘ１を、アンテナ八〇にはＲ
ｘ３を、アンテナＡ２にはＲｘ２を接続して３台の受信
機で−先ずボーチング（ＶＯＴＩＮＧ）受信を行なう。FIG. 3 shows a reception control flowchart of the present invention, and the control operation in the control unit CA will be explained using FIG. 3. The control flow starts, and in step 1, the antenna inputs in the six directions are input to the antennas A1 .
A3. A5 in the second state, A2. A4. Detect the reception level of A6. In step 2, the presence or absence of reception input is detected, and (Y) if there is no input, the antenna switching operation continues. On the other hand, when an input is detected (N), the process proceeds to step 3 to detect whether there is one input or more than one input. 1J
'(y), proceed to step 3, step 4, and if it is 1, 2 or more, follow the determination in step 5. Now, if input is obtained at antenna A1, antennas A2 . Connect the 80 to the receiver. From Figure 2, the receiver Rx1 is attached to antenna A1, and the receiver Rx1 is attached to antenna 80.
x3 is connected to antenna A2, and Rx2 is connected to antenna A2, and the three receivers perform VOTING reception.
この様な状態は移動局がアンテナＡ１ の正面方向にお
り、基地局から遠く離れた場所にいるか、地下道のよう
な伝播条件の悪い場所にいる場合であり、次に入力が現
れるのはその両側の確率が大きいからである。This situation occurs when the mobile station is in front of antenna A1, far away from the base station, or in a place with poor propagation conditions such as an underground passage, and the next input appears on both sides. This is because the probability of
の
前記ステップ３で（Ｎ）場合はステップ５で入力が２方
向か否（３方向）かを判定する。２方向（Ｙ）の場合は
スフフグ６０判定部に進み、２つの入力が隣合うアンテ
ナか否かを判定する。隣合う場合（Ｙ）は２つの入力の
大きい方の隣りへ入力のない受信機を接続する。例えば
アンテナ入力がＡ１くＡ６であった場合について説明す
ると、Ａ１にはＲｘ１が、Ａ６にはＲＸ３が既に接続さ
れている。従って、ステップ７においてＲＸ３はＡ５に
接続されてボーチング受信が行なわれるＤｏこの様な状
態は移動局がアンテナ八〇の中心よりもＡ１側に寄った
方向に所在した場合であり、入力のない受信機Ｒｘ２を
Ａ５に配置している。If the result in step 3 is (N), it is determined in step 5 whether the input is in two directions or not (three directions). In the case of two directions (Y), the process proceeds to the puff puffer 60 determining section, and determines whether the two inputs are adjacent antennas or not. If they are adjacent (Y), the receiver with no input is connected to the neighbor of the larger of the two inputs. For example, in the case where the antenna inputs are A1 and A6, Rx1 is already connected to A1 and RX3 is already connected to A6. Therefore, in step 7, RX3 is connected to A5 and vaulting reception is performed.This situation occurs when the mobile station is located closer to A1 than the center of antenna 80, and reception without input is performed. Machine Rx2 is placed at A5.
勿論、移動局がアンテナＡ１に移ってＡ６くＡ１となれ
ば、受信機ＲＸ２はＡ２に切替えられる。Of course, if the mobile station moves to antenna A1 and becomes A6 x A1, receiver RX2 is switched to A2.
次にステップ６において、２人力がＢのＡ１．Ａ５のよ
うに離れたアンテナ（Ｎ）の場合、ステップ８により無
人力の受信機（Ｒｘ２）は残りのアンテナＡ２．Ａ３．
Ａ４．Ａ６を順番に切替で受信（再サーチ）し、入力の
有無をステップ９で判定する。Next, in step 6, two-manpower is B's A1. In the case of remote antennas (N) such as A5, step 8 causes the unmanned receiver (Rx2) to connect to the remaining antennas A2. A3.
A4. A6 is sequentially switched and received (researched), and the presence or absence of input is determined in step 9.
いま、アンテナＡ に入力があればＣのように八〇をＲ
ｘ２に接続する。入力が得られないときはステップ８，
９の繰返し動作となる。Now, if there is an input to antenna A, 80 is R as shown in C.
Connect to x2. If no input is obtained, step 8,
9 repeated operations.
上記の如き現象は極めて特殊であり、全アンテナＡ１〜
Ａ６に入力があり、Ａ１．Ａ５が特に高入力となる状態
は基地局近傍を移動局が通過するときに発生し、次の強
入力点が両隣りのＡ２Ａ３．Ａ４に生じることが多いも
のである。The above phenomenon is extremely special, and all antennas A1~
There is an input in A6, and A1. A state in which A5 has a particularly high input occurs when a mobile station passes near the base station, and the next strong input point is A2A3 . This often occurs on A4 paper.
ステップ１０ではステップ８で４方向のアンテナを再サ
ーチして最大入力のアンテナが検出されたので、ここに
前記無人力の受信機ＲＸ２を接続してボーチング受信を
続けさせる。ステップ２０で３方向以上の入力がある場
合は上位３方向のアンテナをこの順にＲｘ１〜Ｒｘ３に
接続する。In step 10, the antennas in the four directions are searched again in step 8 and the antenna with the maximum input is detected, so the unmanned receiver RX2 is connected thereto to continue the voting reception. If there are inputs in three or more directions in step 20, the antennas in the top three directions are connected to Rx1 to Rx3 in this order.
ステップ２１以下はボーティング中の動作フローを示す
ものである。Step 21 and subsequent steps show the operational flow during voting.
３台の受信機Ｒｘ１ 、Ｒｘ２．Ｒｘ３は上記フローに
よって決定されたアンテナにより受信を行ない、ステッ
プ２１でその受信レベルを監視している。ステップ２２
は受信入力・有無の判定であり、入力のない受信機があ
る場合は（Ｙ）としてステップ２３で制御部ＣＡに内蔵
の１秒タイマを進める。無人力の受信機のない場合は入
力のステップ２４のレベル差判定により３受信機の入力
最大値Ｐｒｍと入力最小値Ｐｒｍの差Ｐｒｄを求め、レ
ベル差の限界値αｄＢ に対してｃＬｄＢ≧Ｐｒｄを
求めＡｄＢ（Ｐｒｄのとき、ステップ２６により１秒タ
イマにより進める。αｄＢ）Ｐｒｄの場合はステップ２
４を（９）とし、ステップ２５により、を秒タイマをク
リアさせ、アンテナと受信機を固定してボーチング受信
を行なう。Three receivers Rx1, Rx2. Rx3 performs reception using the antenna determined by the above flow, and monitors the reception level in step 21. Step 22
is a determination of the presence or absence of reception input, and if there is a receiver with no input, the result is (Y) and in step 23, the 1-second timer built in the control unit CA is advanced. If there is no unmanned receiver, the difference Prd between the maximum input value Prm and the minimum input value Prm of the three receivers is determined by the level difference judgment in input step 24, and cLdB≧Prd is determined for the limit value αdB of the level difference. Obtained AdB (When Prd, proceed with the 1-second timer in step 26.αdB) If Prd, step 2
4 as (9), and in step 25, the second timer is cleared, the antenna and receiver are fixed, and vaulting reception is performed.
ステップ３１以下は３アンテナ、３受信機にょるボーテ
ィング受信中に受信機の１つ以上が無人力となった状態
のフローを示している。Step 31 and subsequent steps show the flow in a state where one or more of the receivers becomes unmanned during voting reception using three antennas and three receivers.
ステップ２６で１台以上の受信レベルが低下し、無人力
状態がｔ秒以上継続した場合（Ｙ）としてステップ３１
の動作に移行する。ここで入力が第３位の受信機により
、上位２基のアンテナを除く残り４基のアンテナにより
４方向を順次受信し、先ず、を秒タイマーをクリアする
。次にステップ３３において最大入力のアンテナが切替
前のアンテナと異なるか（Ｙ）、否（Ｎ）かを判定する
。If the reception level of one or more units decreases in step 26 and the unmanned state continues for t seconds or more (Y), step 31
Shift to operation. Here, the receiver with the third highest input receives signals in four directions sequentially using the remaining four antennas excluding the top two antennas, and first clears the second timer. Next, in step 33, it is determined whether the antenna with the maximum input is different from the antenna before switching (Y) or not (N).
（Ｎ）の場合は切替前のアンテナに接続する。また、ア
ンテナが異なる場合（Ｙ）はステップ３４により新規ア
ンテナに前記受信機を接続すると共に判定点のステップ
２０に情報を送って３台の受信機によってボーテング受
信を行なう、この動作は通話の終了まで繰返される。ス
テップ４ｏは動、４ 作フローのリセット信
号入力であり、通話開始や終了時にフロー全体のクリア
に用いられる。In case of (N), connect to the antenna before switching. If the antennas are different (Y), the receiver is connected to the new antenna in step 34, and information is sent to the decision point in step 20 to perform boating reception by the three receivers. This operation ends the call. repeated until. Step 4o is a reset signal input for the operation flow, and is used to clear the entire flow at the start or end of a call.
発明の効果
本発明は上記のような構成であり、制御動作を単純化し
たものであり、以下に示す効果が得られるものである。Effects of the Invention The present invention has the above configuration, simplifies the control operation, and provides the following effects.
（ａ） 通信エリアを複数のアンテナで複数のセクタ
に分割し、これに複数の受信機を用いたダイバーシチ受
信により基地送信と移動送信の出力化をバランさせる場
合に３台の受信機を用いて最適なアンテナの選定を極め
て簡単な手順で行なうものであり、より入力レベルの高
いアンテナをサーチする場合にも必らず他の２台の受信
機を用いてダイバーシチ受信を行なうものであるから最
良のＳ／Ｎ改善改善全果揮できる利点がある。(a) When dividing the communication area into multiple sectors using multiple antennas and using diversity reception using multiple receivers to balance the output of base transmission and mobile transmission, use three receivers. It is the best method because it selects the optimal antenna using an extremely simple procedure, and even when searching for an antenna with a higher input level, it always performs diversity reception using two other receivers. There is an advantage that the S/N improvement can be fully realized.
中） ３台の受信機で複数基のアンテナを時分割的にサ
ーチするので、移動機の発信または応答の際の所在方向
の確定を極めて短時間に行なうことができ、最高入力の
アンテナと次に高い入力アンテナ等の有無および順番が
直ちに決定されるので接続時間を短かくできる利点があ
る。(Medium) Since the three receivers search multiple antennas in a time-division manner, the direction of the mobile device's location can be determined in an extremely short time when transmitting or responding. Since the presence or absence and order of high input antennas, etc. are immediately determined, there is an advantage that the connection time can be shortened.
第１図は本発明の一実施例を示す各部の機能ブロック図
、第２図Ａ、Ｂは本発明の待受は受信時のアンテナ切替
の方法を示す説明図、第３図はダイバーシチ受信の動作
を説明するためのフローチャート図である。
Ａ１．Ａ２．・・・・Ａ６・・・・・各セクター用の指
向性アンテナ、ＣＡ、ＡＢ ・・・・・ＣＮ・・・・・
・アンテナ切替制御器、ＳＡ、ＳＢ・・・・・ＳＮ ・
・・・・アンテナ切替スイッチ、Ｄｌ、Ｂ２・・・・・
ＤＮ・・・・・高周波分配器、ＲＸｌ、Ｒｘ２゜Ｒｘ３
・・・・各チャネルの組受信機の１例、Ｉ、 、 Ｉ２
゜工３・・・・・瞬時入力比較器、Ｍｌ、Ａ２．Ａ３・
・・・・・平均入力比較器、Ｂ１．Ｂ２・・・・・ＢＮ
・・・・・・各チャネルのボーテング装置。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名第２
図
ＡFig. 1 is a functional block diagram of each part showing an embodiment of the present invention, Figs. 2 A and B are explanatory diagrams showing a method of antenna switching during reception in the standby mode of the present invention, and Fig. 3 is a diagram of diversity reception. FIG. 3 is a flowchart diagram for explaining the operation. A1. A2. ...A6...Directional antenna for each sector, CA, AB ...CN...
・Antenna switching controller, SA, SB...SN ・
...Antenna selector switch, Dl, B2...
DN...High frequency divider, RXl, Rx2゜Rx3
... An example of a set of receivers for each channel, I, , I2
゜Work 3... Instantaneous input comparator, Ml, A2. A3・
...Average input comparator, B1. B2...BN
...Boating device for each channel. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
Diagram A
Claims (1)
ナと、前記指向性アンテナのいずれかの出力がアンテナ
切替スイッチを介してそれぞれ入力される３台の受信機
と、前記３台の受信機の音声出力の内最大のものを選択
出力するボーチング手段と、前記各受信機の入力の平均
レベルにより前記第３位の平均レベル入力の受信機を用
い前記第１位、第２位の受信機に接続された指向性アン
テナ以外の指向性アンテナに順次接続してサーチを行な
い、前記第３位の受信機の入力が前記第２位の入力以上
になれば、前記アンテナ切替スイッチにより前記第２位
の受信機に前記サーチした指向性アンテナ出力を接続す
るように接続変えするための制御部とを備えたダイバー
シチ受信装置。At least four directional antennas provided in a mobile radio base station, three receivers into which the output of any one of the directional antennas is inputted via an antenna changeover switch, and the three receivers. Voting means for selectively outputting the highest audio output among the audio outputs of the receiver, and a receiver having the third average level input based on the average level of the input of each receiver to receive the first and second highest audio outputs. A search is performed by sequentially connecting directional antennas other than the directional antenna connected to the receiver, and if the input of the third-rank receiver exceeds the input of the second-rank receiver, the antenna changeover switch switches the antenna to the second receiver. and a control unit for changing the connection so as to connect the searched directional antenna output to the second-ranked receiver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19502684A JPS6172421A (en) | 1984-09-18 | 1984-09-18 | Diversity receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19502684A JPS6172421A (en) | 1984-09-18 | 1984-09-18 | Diversity receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6172421A true JPS6172421A (en) | 1986-04-14 |
Family
ID=16334298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19502684A Pending JPS6172421A (en) | 1984-09-18 | 1984-09-18 | Diversity receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6172421A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5548835A (en) * | 1993-12-06 | 1996-08-20 | Nec Corporation | Train radio communication system |
| WO1997020400A1 (en) * | 1995-11-29 | 1997-06-05 | Ntt Mobile Communications Network Inc. | Diversity receiver and control method therefor |
| WO2005062500A2 (en) * | 2003-12-15 | 2005-07-07 | Intel Corporation (A Delaware Coprporation) | Antenna selection for diversity combining |
-
1984
- 1984-09-18 JP JP19502684A patent/JPS6172421A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5548835A (en) * | 1993-12-06 | 1996-08-20 | Nec Corporation | Train radio communication system |
| WO1997020400A1 (en) * | 1995-11-29 | 1997-06-05 | Ntt Mobile Communications Network Inc. | Diversity receiver and control method therefor |
| WO2005062500A2 (en) * | 2003-12-15 | 2005-07-07 | Intel Corporation (A Delaware Coprporation) | Antenna selection for diversity combining |
| WO2005062500A3 (en) * | 2003-12-15 | 2005-11-10 | Intel Corp A Delaware Coprpora | Antenna selection for diversity combining |
| US7356323B2 (en) | 2003-12-15 | 2008-04-08 | Intel Corporation | Antenna selection for diversity combining |
| US8737931B2 (en) | 2003-12-15 | 2014-05-27 | Intel Corporation | Antenna selection for diversity combining |
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