JPH07147549A - Radio receiver - Google Patents

Radio receiver

Info

Publication number
JPH07147549A
JPH07147549A JP5315958A JP31595893A JPH07147549A JP H07147549 A JPH07147549 A JP H07147549A JP 5315958 A JP5315958 A JP 5315958A JP 31595893 A JP31595893 A JP 31595893A JP H07147549 A JPH07147549 A JP H07147549A
Authority
JP
Japan
Prior art keywords
circuit
radio wave
receiver
voltage
power
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP5315958A
Other languages
Japanese (ja)
Inventor
Kiyohisa Ishikawa
清久 石川
Jun Fujiwara
純 藤原
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.)
Tokyo Gas Co Ltd
Original Assignee
Tokyo Gas Co Ltd
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 Tokyo Gas Co Ltd filed Critical Tokyo Gas Co Ltd
Priority to JP5315958A priority Critical patent/JPH07147549A/en
Publication of JPH07147549A publication Critical patent/JPH07147549A/en
Pending legal-status Critical Current

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Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Landscapes

  • Circuits Of Receivers In General (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

PURPOSE:To prolong the continuous operating time of the receiver by suppressing power consumption at carrier sensing of the receiver. CONSTITUTION:A timer circuit 7 drives a control circuit 9 for each specified time and a power supply circuit 11 supplies power intermittently to a radio wave detection section 5. While the radio wave detection section is in operation, a received radio wave voltage is amplified by a high frequency amplifier circuit 15 and detected by a detection circuit 19 via a changeover circuit 17. When no radio wave is in existence, the radio wave detection section is intermittently in operation. When the detection circuit detects an object radio wave, a voltage over a specified voltage is outputted from the detection circuit to the control circuit for a specified time or over and power is supplied to the radio wave detection section and a reception section 13 and an output signal of the changeover circuit is outputted to a mixer circuit 21, in which the signal is converted into an intermediate frequency voltage, it is amplified by an intermediate frequency amplifier circuit 23, converted into a digital signal at a demodulation circuit 25 and a data processing circuit 27 processes data. After a series of data processing is made completed, a data processing end signal is fed to the control circuit and the circuit restores to a radio wave monitor state.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、低消費電力型の無線受
信機に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a low power consumption type radio receiver.

【０００２】[0002]

【従来の技術】従来、電池電源で駆動される無線受信機
はできるだけ消費電流をおさえ、受信機の連続動作時間
を長くするため、間欠的に受信動作を行っている。2. Description of the Related Art Conventionally, a radio receiver driven by a battery power supply intermittently performs a receiving operation in order to keep the current consumption as low as possible and to extend the continuous operation time of the receiver.

【０００３】このような無線受信機として、図５に示す
ようなものがある。図５に示される無線受信機１０１は
アンテナ１０３、受信部１０５、タイマー回路１０７、
電源制御回路１０９、電源回路１１１を有する。受信部
１０５は高周波増幅回路１１３、局部発振回路１１５、
混合回路１１７、中間周波数増幅回路１１９、検波・復
調回路１２１、データ処理回路１２３を有する。An example of such a radio receiver is shown in FIG. The wireless receiver 101 shown in FIG. 5 includes an antenna 103, a receiving unit 105, a timer circuit 107,
It has a power supply control circuit 109 and a power supply circuit 111. The receiving unit 105 includes a high frequency amplifier circuit 113, a local oscillator circuit 115,
It has a mixing circuit 117, an intermediate frequency amplification circuit 119, a detection / demodulation circuit 121, and a data processing circuit 123.

【０００４】タイマー回路１０７は規定時間ごとに電源
制御回路１０９を起動する。電源制御回路１０９が起動
されると、電源回路１１１から受信部１０５に電力が供
給され受信動作が可能となる。The timer circuit 107 activates the power supply control circuit 109 every prescribed time. When the power supply control circuit 109 is activated, power is supplied from the power supply circuit 111 to the receiving unit 105, and reception operation becomes possible.

【０００５】アンテナ１０３で受信された受信電波信号
電圧は高周波増幅回路１１３で増幅され、混合回路１１
７により局部発振回路１１５から送られる信号と混合さ
れ、低周波信号電圧に変換され、中間周波数増幅回路１
１９で増幅され、検波・復調回路１２１によりデジタル
信号に変換されてデータ処理回路１２３により処理され
る。The received radio signal voltage received by the antenna 103 is amplified by the high frequency amplifier circuit 113, and the mixed circuit 11
7 is mixed with the signal sent from the local oscillation circuit 115, converted into a low frequency signal voltage, and the intermediate frequency amplification circuit 1
The signal is amplified by 19, converted into a digital signal by the detection / demodulation circuit 121, and processed by the data processing circuit 123.

【０００６】このように、従来の無線受信機１０１では
タイマー回路１０７により規定時間ごとに電源制御回路
１０９を起動し、電源回路１１１から受信部１０５に電
力をある短い時間のみ供給することで低消費電力化を図
っている。As described above, in the conventional wireless receiver 101, the timer circuit 107 activates the power supply control circuit 109 at regular time intervals, and power is supplied from the power supply circuit 111 to the receiving unit 105 for a short period of time, resulting in low power consumption. We are trying to make electricity.

【０００７】すなわち、受信機１０１は規定時間ごと
に、ある短い時間のみ空間に目的とする電波が存在する
かどうかのチェックを行い（キャリアセンス）、これが
存在する場合には電波信号を復調し、データ処理回路１
０５により情報を解析し、必要な処理を行う（間欠キャ
リアセンス）。この短い受信動作以外の時間には、受信
部１０５に電力が供給されず、受信機１０１は受信動作
を行わない。このようにして受信機１０１の低消費電力
化を図り、一定容量の電池で長時間駆動できるという受
信機を実現していた。That is, the receiver 101 checks whether or not the target radio wave exists in the space only for a certain short time at a predetermined time (carrier sense), and if it exists, demodulates the radio signal, Data processing circuit 1
Information is analyzed by 05 and necessary processing is performed (intermittent carrier sense). Power is not supplied to the receiving unit 105 during the time other than the short receiving operation, and the receiver 101 does not perform the receiving operation. In this way, the power consumption of the receiver 101 is reduced, and a receiver that can be driven for a long time with a battery having a constant capacity is realized.

【０００８】[0008]

【発明が解決しようとする課題】しかしながら、このよ
うな受信機１０１では間欠キャリアセンスを行う場合、
受信部１０５が大きな電流を必要とし、また受信部１０
５が受信動作に入るまでの立上がり時間が長く必要とな
るので、１回の間欠キャリアセンスで大きく電力を消費
してしまい、受信機の連続駆動の長時間化の支障となっ
ていた。However, in such a receiver 101, when performing intermittent carrier sense,
The receiving unit 105 requires a large current, and the receiving unit 10
5 requires a long rising time before starting the receiving operation, so that a large amount of power is consumed by one intermittent carrier sense, which hinders the continuous driving of the receiver from taking a long time.

【０００９】本発明は、このような問題に鑑みてなされ
たもので、その目的とするところは、間欠キャリアセン
ス時の消費電力をおさえ、受信機の駆動時間を延ばすこ
とができる無線受信機を提供することにある。The present invention has been made in view of the above problems, and an object of the present invention is to provide a radio receiver capable of suppressing power consumption during intermittent carrier sensing and extending the drive time of the receiver. To provide.

【００１０】[0010]

【課題を解決するための手段】前述した目的を達成する
ために本発明は、目的とする電波の有無を検知する電波
検知部と、受信された目的とする電波を復調・解析する
受信部と、前記電波検知部で目的とする電波の有無を監
視している場合には、前記電波検知部にのみ間欠的に電
力を供給し、前記電波検知部で電波が検知される場合に
は、前記電波検知部および前記受信部に電力を供給する
電力供給手段と、を具備することを特徴とする無線受信
機である。In order to achieve the above-mentioned object, the present invention provides a radio wave detecting section for detecting the presence or absence of a target radio wave, and a receiving section for demodulating and analyzing the received target radio wave. When the presence or absence of a target radio wave is monitored by the radio wave detection unit, power is intermittently supplied only to the radio wave detection unit, and when the radio wave is detected by the radio wave detection unit, the A radio receiver comprising: a radio wave detection unit and a power supply unit that supplies power to the reception unit.

【００１１】[0011]

【作用】本発明では、通常時は電波検知部にのみ間欠的
に電力が供給され、電波検知部が間欠的に目的とする電
波を検知する。電波検知部で目的とする電波が検知され
た場合ににみ、電波検知部および受信部に電力が供給さ
れ受信状態となる。このため、従来例に比べて更に電力
消費を小さくすることができる。In the present invention, the electric power is intermittently supplied only to the radio wave detecting section, and the radio wave detecting section intermittently detects the target radio wave. Only when the target radio wave is detected by the radio wave detection unit, electric power is supplied to the radio wave detection unit and the reception unit to enter the reception state. Therefore, the power consumption can be further reduced as compared with the conventional example.

【００１２】[0012]

【実施例】以下、図面に基づいて本発明の実施例を詳細
に説明する。図１は、本発明の１実施例に係る無線受信
機１の構成を示すブロック図である。無線受信機１はア
ンテナ３、電波検知部５、タイマー回路７、制御回路
９、電源回路１１、受信部１３を有する。Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a block diagram showing the configuration of a wireless receiver 1 according to an embodiment of the present invention. The wireless receiver 1 has an antenna 3, a radio wave detection unit 5, a timer circuit 7, a control circuit 9, a power supply circuit 11, and a reception unit 13.

【００１３】電波検知部５は高周波増幅回路１５、切り
替え回路１７、検波回路１９を有する。受信部１３は混
合回路２１、中間周波増幅回路２３、復調回路２５、デ
ータ処理回路２７を有する。The radio wave detector 5 has a high frequency amplifier circuit 15, a switching circuit 17, and a detection circuit 19. The reception unit 13 includes a mixing circuit 21, an intermediate frequency amplification circuit 23, a demodulation circuit 25, and a data processing circuit 27.

【００１４】高周波増幅回路１５では、フィルタにより
目的とする周波数の電波のみ選別し、受信電波電圧を増
幅する。In the high frequency amplifier circuit 15, only radio waves having a desired frequency are selected by a filter and the received radio wave voltage is amplified.

【００１５】図２は切り替え回路１７付近の構成を示す
ブロック図であり、切り替え回路１７は電磁継電器から
なり、制御回路９によって制御され、通常時には高周波
増幅回路１５の出力を検波回路１９へ送り、制御回路９
からの指令があると高周波増幅回路１５の出力を混合回
路２１へ送る。FIG. 2 is a block diagram showing the configuration in the vicinity of the switching circuit 17. The switching circuit 17 is composed of an electromagnetic relay, is controlled by the control circuit 9, and normally sends the output of the high frequency amplification circuit 15 to the detection circuit 19. Control circuit 9
When there is a command from, the output of the high frequency amplification circuit 15 is sent to the mixing circuit 21.

【００１６】図３は検波回路１９の構成を示す回路図で
あり、検波回路１９は切り替え回路１７の出力信号を検
波するもので、トランス３１、ダイオード３３、３５、
コンデンサ３７、３９、抵抗４１からなる。FIG. 3 is a circuit diagram showing the structure of the detection circuit 19. The detection circuit 19 detects the output signal of the switching circuit 17, and includes a transformer 31, diodes 33, 35, and
It is composed of capacitors 37 and 39 and a resistor 41.

【００１７】タイマー回路７は規定時間おきに制御回路
９を起動する。制御回路９はタイマー回路７により起動
されると、電源回路１１から電波検知部５に電力を供給
させる。また、検波回路１９から規定値Ａ以上の電圧値
が規定時間Ｂ以上、制御回路９に出力されると、制御回
路９は電源回路１１から電力を電波検知部５および受信
部１３に送り、さらに制御回路９は切り替え回路１７を
切り替えて、切り替え回路１７の出力を混合回路２１に
導く。The timer circuit 7 activates the control circuit 9 at regular intervals. When activated by the timer circuit 7, the control circuit 9 causes the power supply circuit 11 to supply electric power to the radio wave detection unit 5. When the voltage value of the specified value A or more is output from the detection circuit 19 to the control circuit 9 for the specified time B or more, the control circuit 9 sends electric power from the power supply circuit 11 to the radio wave detection unit 5 and the reception unit 13, and The control circuit 9 switches the switching circuit 17 and guides the output of the switching circuit 17 to the mixing circuit 21.

【００１８】受信部１３は電波検知部５で目的の電波が
検波された場合のみ、電源回路１１から電力が供給され
て受信動作を行う。混合回路２１は切り替え回路１７の
出力信号を中間周波電圧に変換する。中間周波増幅回路
２３は混合回路２１から出力される信号を増幅し、復調
回路２５へ送り、復調回路２５は中間周波増幅回路２３
の出力信号を復調しデジタル信号を得る。データ処理回
路２７はこのデジタル信号を処理し、送信器より送信さ
れた電文を復元する。The receiving unit 13 is supplied with power from the power supply circuit 11 and performs a receiving operation only when the target radio wave is detected by the radio wave detecting unit 5. The mixing circuit 21 converts the output signal of the switching circuit 17 into an intermediate frequency voltage. The intermediate frequency amplification circuit 23 amplifies the signal output from the mixing circuit 21 and sends it to the demodulation circuit 25.
The output signal of is demodulated to obtain a digital signal. The data processing circuit 27 processes this digital signal and restores the electronic message transmitted from the transmitter.

【００１９】つぎに、この無線受信機１の動作について
説明する。タイマー回路７は規定時間ごとに制御回路９
を駆動し、制御回路９によって電源回路１１から電波検
知部５にのみ間欠的に電力が供給される。すなわち、電
波検知部５は間欠的に動作する。電波検知部５が動作し
ている状態では、受信電波電圧は高周波増幅回路１５に
より増幅され、切り替え回路１７を介して、検波回路１
９により検波される。検波回路１９により検波された結
果、目的の電波が存在しない場合は、電源回路１１から
電波検知部５にのみ間欠的に電力が供給され、電波検知
部５が目的の電波が存在するか否かを間欠的に検知す
る。Next, the operation of the radio receiver 1 will be described. The timer circuit 7 has a control circuit 9 at every specified time.
The control circuit 9 causes the power supply circuit 11 to intermittently supply power only to the radio wave detection unit 5. That is, the radio wave detector 5 operates intermittently. In a state where the radio wave detection unit 5 is operating, the received radio wave voltage is amplified by the high frequency amplification circuit 15, and the detection circuit 1 is passed through the switching circuit 17.
It is detected by 9. As a result of detection by the detection circuit 19, if the target radio wave does not exist, power is intermittently supplied only from the power supply circuit 11 to the radio wave detection unit 5, and whether the radio wave detection unit 5 has the target radio wave. Is detected intermittently.

【００２０】図４は、検波回路１９の各部の信号の波形
図であり、図４（ａ）はトランス３１の２次側の電圧、
図４（ｂ）はコンデンサ３７の両端電圧、図４（ｃ）は
コンデンサ３５の両端電圧、図４（ｄ）は検波回路１９
の出力電圧を示す。図４（ｄ）において、Ａは制御回路
９が空間に目的の電波が存在するという判断を行う際の
検波回路１９の出力電圧の閾値、Ｂは制御回路９が空間
に目的の電波が存在するという判断を行う際の時間閾値
を示す。すなわち、Ａ以上の電圧値がＢ時間以上、検波
回路１９から制御回路９に出力されると、制御回路９は
空間に目的の電波が存在すると判断し、切り替え回路１
７により信号系統を切り替えて、切り替え回路１７の出
力を混合回路２１に導く。FIG. 4 is a waveform diagram of the signal of each part of the detection circuit 19, and FIG. 4 (a) shows the voltage on the secondary side of the transformer 31,
4B is a voltage across the capacitor 37, FIG. 4C is a voltage across the capacitor 35, and FIG. 4D is a detection circuit 19.
Indicates the output voltage of. In FIG. 4D, A is a threshold value of the output voltage of the detection circuit 19 when the control circuit 9 determines that the target radio wave exists in the space, and B is the control circuit 9 that the target radio wave exists in the space. The time threshold for making the determination is shown. That is, when the voltage value of A or more is output from the detection circuit 19 to the control circuit 9 for B time or more, the control circuit 9 determines that the target radio wave exists in the space, and the switching circuit 1
The signal system is switched by 7 and the output of the switching circuit 17 is guided to the mixing circuit 21.

【００２１】検波回路１９が空間中の目的の電波を検波
し、規定値Ａ以上の電圧値が規定時間Ｂ以上継続して制
御回路９に出力された場合、制御回路９は電源回路１１
から電波検知部５および受信部１３に電力を供給させる
とともに、切り替え回路１７の出力信号先を混合回路２
１側に切り替える。すなわち、受信部１３に電力が供給
され、受信部１３が受信状態となる。When the detection circuit 19 detects a target radio wave in the space and the voltage value of the specified value A or more is continuously output to the control circuit 9 for the specified time B or more, the control circuit 9 causes the power supply circuit 11 to operate.
The electric power is supplied from the radio wave detection unit 5 and the reception unit 13 from the radio wave detection unit 5, and the output signal destination of the switching circuit 17 is set to the mixing circuit
Switch to 1 side. That is, electric power is supplied to the receiving unit 13, and the receiving unit 13 enters the receiving state.

【００２２】切り替え回路１７の出力信号は混合回路２
１に出力され、中間周波に変換され、中間周波増幅回路
２３により増幅され、復調回路２５によりデジタル信号
に変換され、データ処理回路２７によりデータ処理され
る。一連のデータ処理が完結したらデータ処理部２７は
データ処理完了信号を制御回路９へ送り、制御回路９は
この信号を受信することにより、電源回路１１を制御し
て受信部１３への電源供給を停止し、また切り替え回路
１７を制御して切り替え回路１７の出力を検波回路１９
へ導く。その後は上記の電波監視動作に移行する。The output signal of the switching circuit 17 is the mixing circuit 2
1 is output to 1, converted to an intermediate frequency, amplified by the intermediate frequency amplification circuit 23, converted to a digital signal by the demodulation circuit 25, and processed by the data processing circuit 27. When a series of data processing is completed, the data processing unit 27 sends a data processing completion signal to the control circuit 9, and the control circuit 9 receives this signal to control the power supply circuit 11 to supply power to the reception unit 13. The switching circuit 17 is stopped and the output of the switching circuit 17 is detected by the detection circuit 19
Lead to. After that, the operation shifts to the above radio wave monitoring operation.

【００２３】このように、本実施例に係る無線受信機１
では通常の電波監視時においては、電波検知部５にのみ
電力が供給される。この電波検知部５は従来の受信機１
０１の受信部１０５より消費電流が小さく、また、立上
がり時間も短い。したがって、受信機１のキャリアセン
ス時の消費電力を飛躍的におさえることができ、一定容
量の電池での受信機１の連続駆動時間を延ばすことがで
きる。Thus, the radio receiver 1 according to this embodiment
Then, during normal radio wave monitoring, electric power is supplied only to the radio wave detection unit 5. This radio wave detection unit 5 is the conventional receiver 1
The current consumption is smaller than that of the reception unit 105 of No. 01, and the rising time is short. Therefore, the power consumption of the receiver 1 at the time of carrier sensing can be dramatically reduced, and the continuous drive time of the receiver 1 with a battery of a fixed capacity can be extended.

【００２４】[0024]

【発明の効果】以上、詳細に説明したように本発明によ
れば、キャリアセンス時の消費電力をおさえ、受信機の
連続駆動時間を延ばすことができる。As described above in detail, according to the present invention, the power consumption during carrier sensing can be suppressed and the continuous drive time of the receiver can be extended.

【図面の簡単な説明】[Brief description of drawings]

【図１】 本発明の１実施例に係る無線受信機の構成を
示すブロック図FIG. 1 is a block diagram showing a configuration of a wireless receiver according to an embodiment of the present invention.

【図２】 切り替え回路１７付近の構成を示すブロック
図FIG. 2 is a block diagram showing a configuration near a switching circuit 17.

【図３】 検波回路１９の構成を示す回路図FIG. 3 is a circuit diagram showing a configuration of a detection circuit 19.

【図４】 検波回路１９の各部の信号の波形図FIG. 4 is a waveform diagram of signals at various parts of the detection circuit 19.

【図５】 従来の無線受信機の構成を示すブロック図FIG. 5 is a block diagram showing a configuration of a conventional wireless receiver.

【符号の説明】[Explanation of symbols]

１………無線受信機 ３………アンテナ ５………電波検知部 ７………タイマー回路 ９………制御回路 １１………電源回路 １３………受信部 １５………高周波増幅回路 １７………切り替え回路 １９………検波回路 ２１………混合回路 ２３………中間周波数増幅回路 ２５………復調回路 ２７………データ処理回路 1 ... Radio receiver 3 ... Antenna 5 ... Radio wave detector 7 ... Timer circuit 9 ... Control circuit 11 ... Power supply circuit 13 ... Reception unit 15 ... High frequency amplifier circuit 17 Switching circuit 19 Detection circuit 21 Mixing circuit 23 Intermediate frequency amplification circuit 25 Demodulation circuit 27 Data processing circuit

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】 目的とする電波の有無を検知する電波検
知部と、 受信された目的とする電波を復調・解析する受信部と、 前記電波検知部で目的とする電波の有無を監視している
場合には、前記電波検知部にのみ間欠的に電力を供給
し、前記電波検知部で電波が検知される場合には、前記
電波検知部および前記受信部に電力を供給する電力供給
手段と、 を具備することを特徴とする無線受信機。1. A radio wave detection unit that detects the presence or absence of a target radio wave, a reception unit that demodulates and analyzes the received target radio wave, and a radio wave detection unit that monitors the presence or absence of the target radio wave. Power is supplied intermittently only to the radio wave detector, and when a radio wave is detected by the radio wave detector, a power supply means for supplying electric power to the radio wave detector and the receiver. A wireless receiver comprising:
JP5315958A 1993-11-22 1993-11-22 Radio receiver Pending JPH07147549A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5315958A JPH07147549A (en) 1993-11-22 1993-11-22 Radio receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5315958A JPH07147549A (en) 1993-11-22 1993-11-22 Radio receiver

Publications (1)

Publication Number Publication Date
JPH07147549A true JPH07147549A (en) 1995-06-06

Family

ID=18071643

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5315958A Pending JPH07147549A (en) 1993-11-22 1993-11-22 Radio receiver

Country Status (1)

Country Link
JP (1) JPH07147549A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013077471A1 (en) * 2011-11-24 2013-05-30 Panasonic Corporation Wireless communication apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013077471A1 (en) * 2011-11-24 2013-05-30 Panasonic Corporation Wireless communication apparatus
JP2013110709A (en) * 2011-11-24 2013-06-06 Panasonic Corp Radio communication apparatus

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