JP7089392B2 - Wireless microphone system - Google Patents

Wireless microphone system Download PDF

Info

Publication number
JP7089392B2
JP7089392B2 JP2018071182A JP2018071182A JP7089392B2 JP 7089392 B2 JP7089392 B2 JP 7089392B2 JP 2018071182 A JP2018071182 A JP 2018071182A JP 2018071182 A JP2018071182 A JP 2018071182A JP 7089392 B2 JP7089392 B2 JP 7089392B2
Authority
JP
Japan
Prior art keywords
transmitter
sensitivity
receiving antenna
antenna
radio wave
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.)
Active
Application number
JP2018071182A
Other languages
Japanese (ja)
Other versions
JP2019186611A (en
Inventor
晋也 桐生
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tamura Corp
Original Assignee
Tamura Corp
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 Tamura Corp filed Critical Tamura Corp
Priority to JP2018071182A priority Critical patent/JP7089392B2/en
Publication of JP2019186611A publication Critical patent/JP2019186611A/en
Application granted granted Critical
Publication of JP7089392B2 publication Critical patent/JP7089392B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Details Of Audible-Bandwidth Transducers (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)
  • Circuits Of Receivers In General (AREA)

Description

本発明は、送信機として機能するマイクと受信機との間で、音声を電波で送受信するワイヤレスマイクシステムに関する。 The present invention relates to a wireless microphone system that transmits and receives audio by radio waves between a microphone that functions as a transmitter and a receiver.

例えば、特許文献１に示すように、ワイヤスマイクシステムは、良好な電波伝搬を得るために、送信機を運用するエリアの広さや、使用する送信機の数に応じて、受信機の受信アンテナの感度や、送信機の送信電力を適切に調整して運用している。 For example, as shown in Patent Document 1, in order to obtain good radio wave propagation, in order to obtain good radio wave propagation, in order to obtain good radio wave propagation, the receiver antenna of the receiver is set according to the size of the area in which the transmitter is operated and the number of transmitters used. The sensitivity and the transmission power of the transmitter are adjusted appropriately for operation.

特開２０１７－０７９３５９号公報Japanese Unexamined Patent Publication No. 2017-073959

運用エリアがスタジアムの様な広い場合において、受信アンテナから遠い場所にある送信機からのＲＦ信号を良好に受信するためには、受信アンテナの感度を高くするか、感度が高く指向性の優れた受信アンテナを使用する、あるいは、送信機の送信電力を強くする必要がある。しかし、受信アンテナの感度が強い状態や、送信機の送信電力が強い場合では、送信機が受信アンテナの近くに移動してきた際に、受信アンテナに入力されるＲＦ信号が強すぎてしまうと、ＲＦアンプが飽和し、良好な電波伝搬が得られなくなる。 When the operation area is wide such as a stadium, in order to receive the RF signal from the transmitter far from the receiving antenna well, the sensitivity of the receiving antenna should be increased, or the sensitivity should be high and the directivity should be excellent. It is necessary to use a receiving antenna or increase the transmitting power of the transmitter. However, when the sensitivity of the receiving antenna is strong or the transmission power of the transmitter is strong, when the transmitter moves near the receiving antenna, the RF signal input to the receiving antenna becomes too strong. The RF amplifier becomes saturated and good radio wave propagation cannot be obtained.

運用エリア内のすべてにおいて良好な電波伝搬が得られるようにするには、送信機が受信アンテナの近くにある場合でもＲＦ信号が強くなりすぎないようにしつつ、かつ遠くの場合でも良好な電波伝搬が得られるようにしなければならない。そのためには、受信アンテナの感度や送信機の電力の調整だけでなく、受信アンテナに送信機が近づきすぎないように受信アンテナを配置する、受信アンテナの指向性を利用するなど、さまざまな視点での工夫が必要となる。 In order to obtain good radio wave propagation in all areas of the operation area, the RF signal should not be too strong even when the transmitter is near the receiving antenna, and good radio wave propagation is obtained even when the transmitter is far away. Must be obtained. For that purpose, not only adjusting the sensitivity of the receiving antenna and the power of the transmitter, but also arranging the receiving antenna so that the transmitter does not come too close to the receiving antenna, using the directivity of the receiving antenna, etc. It is necessary to devise.

特に、運用する送信機の台数が増えると、受信アンテナに入力されるＲＦ信号が強くなりやすいため、受信アンテナの近くでの運用はより難しくなる。また、受信アンテナの近くと遠くで同時に使用される場合は、近くの送信機によるＲＦ信号が強いため感度抑圧が働き、遠くの送信機に対して感度不足が発生してしまう、という問題もあり、より一層運用が難しくなる。 In particular, as the number of transmitters to be operated increases, the RF signal input to the receiving antenna tends to become stronger, which makes it more difficult to operate near the receiving antenna. In addition, when the RF signal is used near and far from the receiving antenna at the same time, the sensitivity is suppressed because the RF signal from the nearby transmitter is strong, and there is a problem that the sensitivity is insufficient for the distant transmitter. , It becomes more difficult to operate.

運用する送信機の台数が多い場合や、運用エリアの条件によっては、受信アンテナの感度や送信機の電力設定だけではまかないきれない。その場合、受信アンテナの近くで良好な電波伝搬が得られるように設定しておき、送信機の移動にあわせて送信機を追いかけるように受信アンテナも移動させながら運用したりすることが必要となるなど、オペレータにとって負担が大きい。 If the number of transmitters to be operated is large, or depending on the conditions of the operating area, the sensitivity of the receiving antenna and the power setting of the transmitter cannot be enough. In that case, it is necessary to set so that good radio wave propagation can be obtained near the receiving antenna, and to operate while moving the receiving antenna so as to follow the transmitter as the transmitter moves. It is a heavy burden for the operator.

本発明は、上記のような従来技術の問題点を解消するために提案されたものである。本発明の目的は、運用エリア内の送信機の位置情報を取得し、取得した送信機の位置情報に基づいて受信アンテナの感度を適切な値に調整することができるワイヤレスマイクシステムを提供することにある。 The present invention has been proposed to solve the above-mentioned problems of the prior art. An object of the present invention is to provide a wireless microphone system capable of acquiring the position information of a transmitter in an operation area and adjusting the sensitivity of a receiving antenna to an appropriate value based on the acquired position information of the transmitter. It is in.

本発明のワイヤレスマイクシステムは、次のような構成を有することを特徴とする。
（１）送信機と、前記送信機の電波を受信する受信アンテナを備えた受信機と、前記受信機と接続された複数のアクセスポイント。
（２）前記受信機に設けられ、前記受信アンテナによる前記送信機からの電波の受信感度を調整するアンテナ感度設定部。
（３）前記各アクセスポイントに設けられ、前記各アクセスポイントが受信した前記送信機の電波強度を検出する電波強度検出部。
（４）前記受信機に設けられ、前記各アクセスポイントから前記送信機の電波強度を受信する電波強度取得部。
（５）前記受信機に設けられ、前記各アクセスポイントの位置情報及び前記電波強度取得部が受信した前記送信機の電波強度に基づいて、前記送信機の位置を計算する位置情報計算部。
（６）前記受信機に設けられ、前記位置情報計算部が計算した前記送信機の位置に基づいて、前記受信アンテナの受信感度を計算し、計算した受信感度を前記アンテナ感度設定部に出力するアンテナ感度計算部。
The wireless microphone system of the present invention is characterized by having the following configuration.
(1) A transmitter, a receiver provided with a receiving antenna for receiving radio waves of the transmitter, and a plurality of access points connected to the receiver.
(2) An antenna sensitivity setting unit provided in the receiver and adjusting the reception sensitivity of radio waves from the transmitter by the receiving antenna.
(3) A radio wave strength detecting unit provided at each of the access points and detecting the radio wave strength of the transmitter received by each of the access points .
(4) A radio wave strength acquisition unit provided in the receiver and receiving the radio wave strength of the transmitter from each of the access points.
(5) A position information calculation unit provided in the receiver to calculate the position of the transmitter based on the position information of each access point and the radio wave intensity of the transmitter received by the radio wave intensity acquisition unit.
(6) The reception sensitivity of the receiving antenna is calculated based on the position of the transmitter provided in the receiver and calculated by the position information calculation unit, and the calculated reception sensitivity is output to the antenna sensitivity setting unit. Antenna sensitivity calculation unit.

本発明は、次のような態様も包含する。
（１）前記送信機が複数台配置され、前記各アクセスポイントに設けられた前記電波強度検出部が、複数の前記送信機の電波強度を個別に検出し、前記位置情報計算部が、前記各アクセスポイントの位置情報及び前記複数の送信機の電波強度に基づいて複数の前記送信機の位置を個別に計算し、前記アンテナ感度計算部が、前記受信アンテナから前記複数の送信機までの平均距離に基づいて前記受信アンテナの感度を計算する。
（２）前記アンテナ感度計算部が、前記受信アンテナからの電波強度を併用して、前記受信アンテナの感度を計算する。
（３）前記アンテナ感度計算部が、前記受信アンテナで受信したＲＦ信号の受信品質に関する情報を併用して、前記受信アンテナの感度を計算する。
The present invention also includes the following aspects.
(1) A plurality of the transmitters are arranged, the radio wave intensity detecting unit provided at each access point individually detects the radio wave intensity of the plurality of transmitters, and the position information calculation unit performs each of the above. The positions of the plurality of transmitters are individually calculated based on the position information of the access point and the radio wave strength of the plurality of transmitters, and the antenna sensitivity calculation unit calculates the average distance from the receiving antenna to the plurality of transmitters. The sensitivity of the receiving antenna is calculated based on.
( 2 ) The antenna sensitivity calculation unit calculates the sensitivity of the receiving antenna by using the radio wave intensity from the receiving antenna together.
( 3 ) The antenna sensitivity calculation unit calculates the sensitivity of the receiving antenna by using the information on the reception quality of the RF signal received by the receiving antenna together.

本発明によれば、送信機が受信アンテナの近くに移動してきた場合であっても、送信機の位置を自動的に判別することにより、良好な電波伝搬が得られる。 According to the present invention, even when the transmitter moves near the receiving antenna, good radio wave propagation can be obtained by automatically determining the position of the transmitter.

第１実施形態のワイヤレスマイクシステムのブロック図。The block diagram of the wireless microphone system of 1st Embodiment. 第２実施形態のワイヤレスマイクシステムのブロック図。The block diagram of the wireless microphone system of the 2nd Embodiment.

［１．第１実施形態］
以下、本発明の第１実施形態を図面に従って具体的に説明する。本実施形態は、受信機に最も近い送信機の位置に応じて受信アンテナの感度を調整する。
（１）構成
図１に示すように、本実施形態のワイヤレスマイクシステムは、１台あるいは複数台の送信機１と受信機２、受信機２に設けられた受信アンテナ３、および受信機２と接続された複数のアクセスポイントＡＰ１～ＡＰｎを備える。図１では、受信機１に最も近い送信機１のみを示している。 [1. First Embodiment]
Hereinafter, the first embodiment of the present invention will be specifically described with reference to the drawings. In this embodiment, the sensitivity of the receiving antenna is adjusted according to the position of the transmitter closest to the receiver.
(1) Configuration As shown in FIG. 1, the wireless microphone system of the present embodiment includes one or a plurality of transmitters 1 and receiver 2, a receiving antenna 3 provided in the receiver 2, and a receiver 2. A plurality of connected access points AP1 to APn are provided. FIG. 1 shows only the transmitter 1 closest to the receiver 1.

近年、ワイヤレスマイクシステムでは、送信機１本体の設定を、アクセスポイントＡＰ１～ＡＰｎまたは受信機２との間の外部リモートにより行う機能を有すものが主流となっている。この外部リモートの通信には、例えば、２．４Ｇ帯のIEEE802.15.4規格の無線通信や、Bluetooth（登録商標）通信などが用いられる。各アクセスポイントＡＰ１～ＡＰｎは送信機１が配置されるエリアの各所に分散して設けられ、エリア内に配置された送信機１から発信される外部リモート用の電波の強度を検出する電波強度検出部（図示せず）を有する。受信機２と各アクセスポイントＡＰ１～ＡＰｎの電波強度検出部との間は専用の信号線あるいは有線ＬＡＮのようなネットワークにより接続される。 In recent years, the mainstream of wireless microphone systems has a function of setting the transmitter 1 main body by an external remote between the access points AP1 to APn or the receiver 2. For this external remote communication, for example, 2.4G band IEEE 802.15.4 standard wireless communication, Bluetooth (registered trademark) communication, and the like are used. Each access point AP1 to APn is distributed in various places in the area where the transmitter 1 is arranged, and the radio wave intensity detection for detecting the intensity of the radio wave for an external remote transmitted from the transmitter 1 arranged in the area is detected. It has a part (not shown). The receiver 2 and the radio field strength detection unit of each access point AP1 to APn are connected by a dedicated signal line or a network such as a wired LAN.

受信機２には、受信アンテナ３の受信感度を設定するアンテナ感度設定部４が設けられる。受信機２には、電波強度取得部５、位置情報計算部６及びアンテナ感度計算部７が設けられる。電波強度取得部５は各アクセスポイントＡＰ１～ＡＰｎと接続され、各アクセスポイントＡＰ１～ＡＰｎの電波強度検出部が送信機１について受信した電波の強度が入力される。位置情報計算部６は、各アクセスポイントＡＰ１～ＡＰｎから受信した電波の強度に基づいて、受信機２に最も近い送信機１のエリア内における位置を計算する。また、エリア内における受信機２の位置を予め記憶しておき、受信機２の位置とエリア内における個々の受信機２の位置とに基づいて、送信機１と受信機２との距離を計算する。 The receiver 2 is provided with an antenna sensitivity setting unit 4 for setting the reception sensitivity of the receiving antenna 3. The receiver 2 is provided with a radio wave intensity acquisition unit 5, a position information calculation unit 6, and an antenna sensitivity calculation unit 7. The radio wave strength acquisition unit 5 is connected to each access point AP1 to APn, and the radio wave intensity received by the radio wave strength detection unit of each access point AP1 to APn for the transmitter 1 is input. The position information calculation unit 6 calculates the position in the area of the transmitter 1 closest to the receiver 2 based on the intensity of the radio waves received from each access point AP1 to APn. Further, the position of the receiver 2 in the area is stored in advance, and the distance between the transmitter 1 and the receiver 2 is calculated based on the position of the receiver 2 and the position of each receiver 2 in the area. do.

アンテナ感度計算部７は位置情報計算部６によって計算された送信機１と受信機２との距離に基づいて、送信機１に対する受信感度を計算する。すなわち、ワイヤレスマイクシステムでは、あらかじめ、同時に使用する送信機１の台数や送信機１の送信電力、受信アンテナ３の感度に応じて、運用エリア（具体的には、受信アンテナ３との最小距離、最長距離）の目安が定められる。アンテナ感度計算部７は予め定められたこの目安の情報を自身の内部あるいは外部の記憶装置に保存しておく。アンテナ感度計算部７は位置情報計算部６から送信機１の位置情報を受信すると、その位置情報が予め記憶されている運用エリア内に収まるものか否かを判定する。 The antenna sensitivity calculation unit 7 calculates the reception sensitivity with respect to the transmitter 1 based on the distance between the transmitter 1 and the receiver 2 calculated by the position information calculation unit 6. That is, in the wireless microphone system, the operating area (specifically, the minimum distance from the receiving antenna 3) is determined in advance according to the number of transmitters 1 used at the same time, the transmission power of the transmitter 1, and the sensitivity of the receiving antenna 3. A guideline for the longest distance) is set. The antenna sensitivity calculation unit 7 stores the predetermined information of this guideline in its own internal or external storage device. When the antenna sensitivity calculation unit 7 receives the position information of the transmitter 1 from the position information calculation unit 6, it determines whether or not the position information is within the operation area stored in advance.

受信機２には表示部８が設けられる。表示部８は、アクセスポイントＡＰ１～ＡＰｎからの電波強度情報や、計算された送信機１の位置情報、受信アンテナ３の感度設定情報を表示する。 The receiver 2 is provided with a display unit 8. The display unit 8 displays the radio wave intensity information from the access points AP1 to APn, the calculated position information of the transmitter 1, and the sensitivity setting information of the receiving antenna 3.

（２）作用
本実施形態の作用は、以下のとおりである。
運用エリア内に送信機が配置されると送信機と複数のアクセスポイントＡＰ１～ＡＰｎとの間で外部リモート用の通信信号などが送受信される。各アクセスポイントＡＰ１からＡＰｎに設けられた電波強度検出部は送信機から受信した電波の強度を検出し、ネットワークを介してその情報を受信機２に送信する。受信機２の電波強度取得部５は複数のアクセスポイントＡＰ１～ＡＰｎから受信した電波強度を各アクセスポイントのＩＤと共に位置情報計算部６に送信する。 (2) Action The action of this embodiment is as follows.
When the transmitter is arranged in the operation area, a communication signal for an external remote is transmitted / received between the transmitter and the plurality of access points AP1 to APn. The radio wave strength detection unit provided in each access point AP1 to APn detects the strength of the radio wave received from the transmitter and transmits the information to the receiver 2 via the network. The radio wave strength acquisition unit 5 of the receiver 2 transmits the radio wave strength received from the plurality of access points AP1 to APn to the position information calculation unit 6 together with the ID of each access point.

位置情報計算部６は各アクセスポイントＡＰ１～ＡＰｎからの電波強度の情報を元に、送信機１が運用エリア内のどのエリアに存在しているかを計算する。位置情報計算部６によって得られた送信機１の位置はアンテナ感度計算部７に送られる。アンテナ感度計算部７は計算された送信機１の位置情報より、受信アンテナ３の感度の適正値を計算し、アンテナ感度設定部４に設定情報を送り、受信アンテナ３の感度が設定される。すなわち、送信機１が受信アンテナ３に対して適切な距離以上近接している場合には、送信機１と受信アンテナ３との距離に応じて受信アンテナ３の感度を低減させるに必要な適正値を計算してアンテナ感度設定部４に送信する。このようにすることで、受信アンテナ３の感度が低減され、ＲＦ信号が強いために生じる必要以上の感度抑圧が防止される。 The position information calculation unit 6 calculates in which area the transmitter 1 exists in the operation area based on the information of the radio wave strength from each access point AP1 to APn. The position of the transmitter 1 obtained by the position information calculation unit 6 is sent to the antenna sensitivity calculation unit 7. The antenna sensitivity calculation unit 7 calculates an appropriate value of the sensitivity of the receiving antenna 3 from the calculated position information of the transmitter 1, sends the setting information to the antenna sensitivity setting unit 4, and sets the sensitivity of the receiving antenna 3. That is, when the transmitter 1 is closer than an appropriate distance to the receiving antenna 3, an appropriate value required to reduce the sensitivity of the receiving antenna 3 according to the distance between the transmitter 1 and the receiving antenna 3. Is calculated and transmitted to the antenna sensitivity setting unit 4. By doing so, the sensitivity of the receiving antenna 3 is reduced, and unnecessary suppression of sensitivity caused by the strong RF signal is prevented.

本実施形態において、運用エリア内に複数の送信機１が配置されている場合には、各アクセスポイントＡＰ１～ＡＰｎは、各送信機１の電波の強度と各送信機１のＩＤを紐付けて受信する。位置情報計算部６は各送信機１の位置を計算して、受信機２に最も近い送信機１の位置をアンテナ感度計算部７に送る。アンテナ感度計算部７は受信機２に最も近い送信機１の位置情報より、受信アンテナ３の感度の適正値を計算し、アンテナ感度設定部４に送信する。 In the present embodiment, when a plurality of transmitters 1 are arranged in the operation area, each access point AP1 to APn associates the radio wave strength of each transmitter 1 with the ID of each transmitter 1. Receive. The position information calculation unit 6 calculates the position of each transmitter 1 and sends the position of the transmitter 1 closest to the receiver 2 to the antenna sensitivity calculation unit 7. The antenna sensitivity calculation unit 7 calculates an appropriate value of the sensitivity of the receiving antenna 3 from the position information of the transmitter 1 closest to the receiver 2, and transmits it to the antenna sensitivity setting unit 4.

（３）効果
本実施形態によれば、次のような効果が発揮される。
（１）従来は、ワイヤレスマイクの運用エリアが広く、運用台数が多い場合など、受信アンテナ３の設定が難しい場面において、送信機１の運用位置に応じてオペレータが受信アンテナ３の位置や向きなどを手動調整していた。これに対して、本実施形態では、送信機１の位置情報に基づいて自動的に適正な受信感度に調整される。その結果、オペレータの負担が減るだけでなく、不意な送信機１の移動による電波伝搬の劣化を防ぐことができ、高品位なワイヤレスマイクの運用ができる。 (3) Effect According to this embodiment, the following effects are exhibited.
(1) Conventionally, in a situation where it is difficult to set the receiving antenna 3 such as when the operating area of the wireless microphone is wide and the number of operating units is large, the operator determines the position and orientation of the receiving antenna 3 according to the operating position of the transmitter 1. Was manually adjusted. On the other hand, in the present embodiment, the reception sensitivity is automatically adjusted to an appropriate level based on the position information of the transmitter 1. As a result, not only the burden on the operator is reduced, but also deterioration of radio wave propagation due to unexpected movement of the transmitter 1 can be prevented, and a high-quality wireless microphone can be operated.

（２）運用エリア内に、外部リモート用のアクセスポイントＡＰ１～ＡＰｎを複数用意することで、各アクセスポイントＡＰ１～ＡＰｎと送信機間の電波強度により、例えば三点測量により運用エリアのどの位置に送信機が存在しているかを把握することができる。特に、アクセスポイントＡＰ１～ＡＰｎには送信機１の外部リモート用の送受信手段が設けられているので、各アクセスポイントＡＰ１からＡＰｎが受信した外部リモート用の電波強度をそのまま利用して送信機１の位置を判定することができる。そのため、送信機１の位置を判定するためのＧＰＳなどの専用の手段が不要であり、システムの構成が簡単なものでよい。 (2) By preparing multiple access points AP1 to APn for external remote in the operation area, the position of the operation area can be determined by the radio wave strength between each access point AP1 to APn and the transmitter, for example, by three-point survey. It is possible to know whether the transmitter exists. In particular, since the access points AP1 to APn are provided with transmission / reception means for the external remote of the transmitter 1, the radio wave strength for the external remote received by the APn from each access point AP1 is used as it is for the transmitter 1. The position can be determined. Therefore, a dedicated means such as GPS for determining the position of the transmitter 1 is not required, and the system configuration may be simple.

［２．第２実施形態］
本発明の第２実施形態を図２に従って説明する。本実施形態では同一エリア内に複数の送信機１ａ～１ｎが異なる位置で配置される。受信アンテナ３は複数の送信機１ａ～１ｎの電波を一括して受信する。そのため、アンテナ感度設定部４によって設定される受信アンテナ３の感度は個々の送信機１ａ～１ｎの位置に応じて設定されるのではなく、受信アンテナ３の近くにある送信機１ａ～１ｎの数に応じて設定される。 [2. Second Embodiment]
A second embodiment of the present invention will be described with reference to FIG. In this embodiment, a plurality of transmitters 1a to 1n are arranged at different positions in the same area. The receiving antenna 3 collectively receives radio waves from a plurality of transmitters 1a to 1n. Therefore, the sensitivity of the receiving antenna 3 set by the antenna sensitivity setting unit 4 is not set according to the positions of the individual transmitters 1a to 1n, but is the number of transmitters 1a to 1n near the receiving antenna 3. It is set according to.

本実施形態では、各アクセスポイントＡＰ１～ＡＰｎは、各送信機１ａ～１ｎの電波の強度と各送信機１ａ～１ｎのＩＤを紐付けて受信し、これを受信機２の電波強度取得部５に送信する。位置情報計算部６は、各アクセスポイントＡＰ１～ＡＰｎにおける各送信機１ａ～１ｎからの受信電波強度に基づいて、各送信機１ａ～１ｎの位置を計算し、アンテナ感度計算部７に送信する。アンテナ感度計算部７においては、予め記憶しておいた閾値、例えば、受信アンテナ感度を低下させるための距離と、その距離内に存在する送信機の数の組み合わせに基づいて決定される閾値に従って、受信アンテナ３の感度をどのような値にするかを計算する。 In the present embodiment, each access point AP1 to APn receives the radio wave strength of each transmitter 1a to 1n in association with the ID of each transmitter 1a to 1n, and receives this in association with the radio wave strength acquisition unit 5 of the receiver 2. Send to. The position information calculation unit 6 calculates the position of each transmitter 1a to 1n based on the received radio wave intensity from each transmitter 1a to 1n at each access point AP1 to APn, and transmits the position to the antenna sensitivity calculation unit 7. In the antenna sensitivity calculation unit 7, according to a threshold value stored in advance, for example, a threshold value determined based on a combination of a distance for reducing the receiving antenna sensitivity and the number of transmitters existing within the distance. Calculate what value the sensitivity of the receiving antenna 3 should be.

例えば、多くの送信機１ａ～１ｎが受信アンテナ３に近い位置にいる場合は、受信アンテナ３の感度は低く抑える。多くの送信機１ａ～１ｎが遠くにある場合は、受信アンテナ３の感度を高くする。近くと遠くで同時使用される場合、近くの台数と遠くの台数から、受信回路のＲＦアンプが飽和しない電力となる様に、受信アンテナ３の感度を調整する。あるいは、単純に各送信機１ａ～１ｎの平均距離を求めこの平均距離が予め記憶された閾値を超えた場合に受信アンテナ３の感度を低下させても良い。 For example, when many transmitters 1a to 1n are located close to the receiving antenna 3, the sensitivity of the receiving antenna 3 is kept low. When many transmitters 1a to 1n are far away, the sensitivity of the receiving antenna 3 is increased. When used simultaneously in the near and far distances, the sensitivity of the receiving antenna 3 is adjusted so that the power does not saturate the RF amplifier of the receiving circuit from the number of nearby units and the number of distant units. Alternatively, the sensitivity of the receiving antenna 3 may be lowered when the average distance of each transmitter 1a to 1n is simply obtained and the average distance exceeds a threshold value stored in advance.

このような構成を有する本実施形態では、同一エリア内に複数の送信機１ａ～１ｎが配置されている場合であっても、各送信機１ａ～１ｎの距離と台数とによって受信アンテナ３の感度を適正に設定することができる。特に、本実施形態は、１本の受信アンテナ３によって複数の送信機１ａ～１ｎの電波を受信する場合に、受信回路のＲＦアンプが飽和することがなく、受信機２から異常音が発生することがない利点がある。また、アリーナやゴルフ場などのように送信機を配置するエリアが広く、送信機の台数も多い場合でも適正な受信アンテナ３の感度を得ることができる。 In the present embodiment having such a configuration, even when a plurality of transmitters 1a to 1n are arranged in the same area, the sensitivity of the receiving antenna 3 depends on the distance and the number of the transmitters 1a to 1n. Can be set properly. In particular, in the present embodiment, when the radio waves of a plurality of transmitters 1a to 1n are received by one receiving antenna 3, the RF amplifier of the receiving circuit is not saturated and an abnormal sound is generated from the receiver 2. There is no advantage. Further, even when the area where the transmitters are arranged is wide such as an arena or a golf course and the number of transmitters is large, the appropriate sensitivity of the receiving antenna 3 can be obtained.

［３．他の実施形態］
本発明は前記実施形態に限定されるものではなく、例えば、次のような他の実施形態も包含する。
（１）受信アンテナ３で受信したＲＦ信号の受信品質を監視できるワイヤレスマイクシステムにおいては、受信エラー率のような受信品質に関する情報を併用することで、より高精度に受信アンテナ３の感度設定を行う様にしても良い。すなわち、受信エラー率を併用した場合、受信アンテナ３の近くにある送信機１のエラー率が上昇傾向の場合には受信アンテナ３へ入力されるＲＦ信号が強すぎると判断して受信アンテナ３の感度を下げる。反対に、受信アンテナ３から遠い送信機１のエラー率が上昇傾向の場合、感度不足と判断して受信アンテナ３の感度を上げる。受信データのエラーチェックの方法としては、送信データをデジタル化して冗長性を付与しておくことで、受信側でデータの誤り検出及び訂正を行う。冗長化方式としては、垂直パリティチェック方式、水平パリティチェック方式、ハミング符号方式、ＣＲＣ方式、リードソロモン符号方式、畳み込み符号方式、ビタビ復号方式、ターボ符号方式等を適宜採用できる。 [3. Other embodiments]
The present invention is not limited to the above embodiment, and includes, for example, other embodiments such as the following.
(1) In a wireless microphone system that can monitor the reception quality of the RF signal received by the reception antenna 3, the sensitivity of the reception antenna 3 can be set more accurately by using information on the reception quality such as the reception error rate together. You may do it. That is, when the reception error rate is also used, if the error rate of the transmitter 1 near the receiving antenna 3 tends to increase, it is determined that the RF signal input to the receiving antenna 3 is too strong, and the receiving antenna 3 is used. Decrease the sensitivity. On the contrary, when the error rate of the transmitter 1 far from the receiving antenna 3 tends to increase, it is determined that the sensitivity is insufficient and the sensitivity of the receiving antenna 3 is increased. As a method of error checking of received data, by digitizing the transmitted data and adding redundancy, the receiving side performs error detection and correction of the data. As the redundancy method, a vertical parity check method, a horizontal parity check method, a Hamming code method, a CRC method, a Reed-Solomon code method, a convolutional code method, a Viterbi decoding method, a turbo code method and the like can be appropriately adopted.

（２）第１実施形態では、各計算部６，７を受信機２に設けたが、受信機２の外部に設けたパソコン等の別装置を用意し、別装置上に各計算部６，７を設けても良い。 (2) In the first embodiment, each calculation unit 6 and 7 is provided in the receiver 2, but another device such as a personal computer provided outside the receiver 2 is prepared, and each calculation unit 6 and 7 are provided on the separate device. 7 may be provided.

（３）各アクセスポイントＡＰ１～ＡＰｎと受信機２との間は図示のように有線で接続する以外に、無線によって接続することも可能である。 (3) In addition to the wired connection between each access point AP1 to APn and the receiver 2 as shown in the figure, it is also possible to connect wirelessly.

（４）同一エリア内に複数の送信機１ａ～１ｎが配置されている場合に、各送信機１ａ～１ｎに対して専用の受信アンテナ３を設け、位置情報計算部６によって計算した各送信機１ａ～１ｎと受信アンテナ３との距離に応じて、アンテナ感度設定部４により専用の受信アンテナ３の感度を制御することもできる。 (4) When a plurality of transmitters 1a to 1n are arranged in the same area, a dedicated receiving antenna 3 is provided for each of the transmitters 1a to 1n, and each transmitter calculated by the position information calculation unit 6 is provided. The sensitivity of the dedicated receiving antenna 3 can also be controlled by the antenna sensitivity setting unit 4 according to the distance between 1a to 1n and the receiving antenna 3.

（５）一般的なワイヤレスマイクシステムでは、受信アンテナ３にて受信するＲＦ信号の電波強度は常に受信機２側にて把握されるため、受信アンテナ３の感度調整には、各実施形態で採用した複数のアクセスポイントＡＰ１～ＡＰｎによる電波強度からの位置情報に加えて、受信機２のＲＦ信号の強度の情報を併用してもよい。すなわち、図１及び図２の電波強度取得部５に対して、各図中矢印で示すように、受信アンテナ３で受信した送信機１からのＲＦ信号を入力し、このＲＦ信号の電波強度も考慮して受信機２の位置を特定する。 (5) In a general wireless microphone system, the radio wave strength of the RF signal received by the receiving antenna 3 is always grasped by the receiver 2, and therefore, it is adopted in each embodiment for adjusting the sensitivity of the receiving antenna 3. In addition to the position information from the radio wave strength by the plurality of access points AP1 to APn, the information on the strength of the RF signal of the receiver 2 may be used together. That is, as shown by the arrows in each figure, the RF signal from the transmitter 1 received by the receiving antenna 3 is input to the radio wave strength acquisition unit 5 of FIGS. 1 and 2, and the radio wave strength of this RF signal is also The position of the receiver 2 is specified in consideration.

（６）アンテナ感度設定部４としては、受信アンテナ３が受信した電波の強度を減衰回路などによって調整するもの以外に、指向性を有する受信アンテナ３の場合には送信機１の位置に応じて受信アンテナ３の向きを変えることで受信感度を調整するものが使用できる。 (6) The antenna sensitivity setting unit 4 adjusts the intensity of the radio wave received by the receiving antenna 3 by an attenuation circuit or the like, and in the case of the receiving antenna 3 having directivity, it depends on the position of the transmitter 1. Those that adjust the reception sensitivity by changing the direction of the reception antenna 3 can be used.

１，１ａ～１ｎ…送信機
２…受信機
３…受信アンテナ
４…アンテナ感度設定部
５…電波強度取得部
６…位置情報計算部
７…アンテナ感度計算部
８…表示部

ＡＰ１～ＡＰｎ…アクセスポイント 1,1a-1n ... Transmitter 2 ... Receiver 3 ... Receiver antenna 4 ... Antenna sensitivity setting unit 5 ... Radio wave intensity acquisition unit 6 ... Position information calculation unit 7 ... Antenna sensitivity calculation unit 8 ... Display unit

AP1 to APn ... Access point

Claims (4)

送信機と、前記送信機の電波を受信する受信アンテナを備えた受信機と、前記受信機と接続された複数のアクセスポイントを備えたワイヤレスマイクシステムにおいて、
前記受信機に設けられ、前記受信アンテナによる前記送信機からの電波の受信感度を調整するアンテナ感度設定部と、
前記各アクセスポイントに設けられ、前記各アクセスポイントが受信した前記送信機の電波強度を検出する電波強度検出部と、
前記受信機に設けられ、前記各アクセスポイントから前記送信機の電波強度を受信する電波強度取得部と、
前記受信機に設けられ、前記各アクセスポイントの位置情報及び前記電波強度取得部が受信した前記送信機の電波強度に基づいて、前記送信機の位置を計算する位置情報計算部と、
前記受信機に設けられ、前記位置情報計算部が計算した前記送信機の位置に基づいて、前記受信アンテナの受信感度を計算し、計算した受信感度を前記アンテナ感度設定部に出力するアンテナ感度計算部と、
を備えていることを特徴とするワイヤレスマイクシステム。 In a transmitter, a receiver with a receiving antenna for receiving radio waves from the transmitter, and a wireless microphone system with a plurality of access points connected to the receiver.
An antenna sensitivity setting unit provided in the receiver and adjusting the reception sensitivity of radio waves from the transmitter by the receiving antenna, and an antenna sensitivity setting unit.
A radio wave strength detecting unit provided at each of the access points and detecting the radio field strength of the transmitter received by each of the access points .
A radio wave strength acquisition unit provided in the receiver and receiving the radio wave strength of the transmitter from each of the access points,
A position information calculation unit provided in the receiver and calculating the position of the transmitter based on the position information of each access point and the radio wave intensity of the transmitter received by the radio wave intensity acquisition unit.
Antenna sensitivity calculation provided in the receiver, calculating the reception sensitivity of the receiving antenna based on the position of the transmitter calculated by the position information calculation unit, and outputting the calculated reception sensitivity to the antenna sensitivity setting unit. Department and
A wireless microphone system that features. 前記送信機が複数台配置され、
前記各アクセスポイントに設けられた前記電波強度検出部が、複数の前記送信機の電波強度を個別に検出し、
前記位置情報計算部が、前記各アクセスポイントの位置情報及び前記複数の送信機の電波強度に基づいて複数の前記送信機の位置を個別に計算し、
前記アンテナ感度計算部が、前記受信アンテナから前記複数の送信機までの平均距離に基づいて前記受信アンテナの感度を計算することを特徴とする請求項１に記載のワイヤレスマイクシステム。 Multiple transmitters are arranged,
The radio wave strength detecting unit provided in each of the access points individually detects the radio field strength of the plurality of transmitters, and the radio wave strength is detected.
The position information calculation unit individually calculates the positions of the plurality of transmitters based on the position information of each access point and the radio wave strength of the plurality of transmitters.
The wireless microphone system according to claim 1, wherein the antenna sensitivity calculation unit calculates the sensitivity of the receiving antenna based on the average distance from the receiving antenna to the plurality of transmitters . 前記アンテナ感度計算部が、前記受信アンテナからの電波強度を併用して、前記受信アンテナの感度を計算する請求項１又は２に記載のワイヤレスマイクシステム。 The wireless microphone system according to claim 1 or 2 , wherein the antenna sensitivity calculation unit calculates the sensitivity of the receiving antenna by using the radio wave intensity from the receiving antenna in combination . 前記アンテナ感度計算部が、前記受信アンテナで受信したＲＦ信号の受信品質に関する情報を併用して、前記受信アンテナの感度を計算する請求項１から請求項３のいずれか１項に記載のワイヤレスマイクシステム。
The wireless microphone according to any one of claims 1 to 3 , wherein the antenna sensitivity calculation unit calculates the sensitivity of the receiving antenna by using the information on the reception quality of the RF signal received by the receiving antenna together. system.
JP2018071182A 2018-04-02 2018-04-02 Wireless microphone system Active JP7089392B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2018071182A JP7089392B2 (en) 2018-04-02 2018-04-02 Wireless microphone system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2018071182A JP7089392B2 (en) 2018-04-02 2018-04-02 Wireless microphone system

Publications (2)

Publication Number Publication Date
JP2019186611A JP2019186611A (en) 2019-10-24
JP7089392B2 true JP7089392B2 (en) 2022-06-22

Family

ID=68337674

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2018071182A Active JP7089392B2 (en) 2018-04-02 2018-04-02 Wireless microphone system

Country Status (1)

Country Link
JP (1) JP7089392B2 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002044778A (en) 2000-07-28 2002-02-08 Yamaha Corp Microphone, microphone adapter, display device, mixer, public address system and method
JP2003318756A (en) 2002-04-26 2003-11-07 Toa Corp Digital radio receiver
JP2006054601A (en) 2004-08-10 2006-02-23 Toa Corp Radio communication system
JP2006060615A (en) 2004-08-20 2006-03-02 Tamura Seisakusho Co Ltd Wireless microphone system, sound transmitting and reproducing method, wireless microphone transmitter, sound transmitting method and program, receiver, and sound receiving and reproducing method and program
JP2010500604A (en) 2006-08-11 2010-01-07 サーフ・テクノロジー，インコーポレイテッド Cell ID based positioning from common cell parts

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002044778A (en) 2000-07-28 2002-02-08 Yamaha Corp Microphone, microphone adapter, display device, mixer, public address system and method
JP2003318756A (en) 2002-04-26 2003-11-07 Toa Corp Digital radio receiver
JP2006054601A (en) 2004-08-10 2006-02-23 Toa Corp Radio communication system
JP2006060615A (en) 2004-08-20 2006-03-02 Tamura Seisakusho Co Ltd Wireless microphone system, sound transmitting and reproducing method, wireless microphone transmitter, sound transmitting method and program, receiver, and sound receiving and reproducing method and program
JP2010500604A (en) 2006-08-11 2010-01-07 サーフ・テクノロジー，インコーポレイテッド Cell ID based positioning from common cell parts

Also Published As

Publication number Publication date
JP2019186611A (en) 2019-10-24

Similar Documents

Publication Publication Date Title
US7598911B2 (en) Method and system for positioning mobile units based on angle measurements
US10680927B2 (en) Adaptive beam assessment to predict available link bandwidth
EP3262768B1 (en) Systems and methods of antenna diversity switching
US9414170B2 (en) Hearing aid having an adaptive antenna matching mechanism and a method for adaptively matching a hearing aid antenna
EP2944131A1 (en) A system, a device and a method for adjusting signal strength in a distributed amplifier system
JP6775908B2 (en) Person position detection device, person position detection system, person position detection method and program
KR101923592B1 (en) Device and method for controlling power in mobile telephone
JP7089392B2 (en) Wireless microphone system
JP2019004455A5 (en)
US8224241B1 (en) System and method for antenna orientation for mobile applications
KR101778528B1 (en) Method and apparatus for transmitting of communication terminal having antenna
KR20170037924A (en) Device and method for controlling power in mobile telephone
EP2645594A2 (en) Wireless communication device capable of controlling signal polarization based on channel conditions
EP2750408B1 (en) A hearing aid having an adaptive antenna matching mechanism and a method for adaptively matching a hearing aid antenna
JP4545921B2 (en) Wireless communication device
JP2020173177A (en) Position estimating device, mobile device, spatial data presentation device, position estimating method, and program
JP2000315907A (en) Device for adjusting direction of antenna
JP7055607B2 (en) Digital mobile wireless communication system and mobile station wireless device
US20090258601A1 (en) Transmission method with transmission power control
CN107690153B (en) Wireless communication connection system and wireless communication connection method
US11159251B2 (en) Antenna control method and communication system control method
JP2002158623A (en) Bit-error rate confirming device for receiver for digital radio transmission system
TWI728416B (en) Control methods of antenna and communication system
KR20180033998A (en) Base station antenna and remote electric tilt
JP2022152232A (en) Estimation device, program, and system

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20210330

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20211109

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20211130

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20220127

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20220517

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20220610

R150 Certificate of patent or registration of utility model

Ref document number: 7089392

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150