JP4624186B2 - Diversity device and diversity method - Google Patents

Diversity device and diversity method Download PDF

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JP4624186B2
JP4624186B2 JP2005173755A JP2005173755A JP4624186B2 JP 4624186 B2 JP4624186 B2 JP 4624186B2 JP 2005173755 A JP2005173755 A JP 2005173755A JP 2005173755 A JP2005173755 A JP 2005173755A JP 4624186 B2 JP4624186 B2 JP 4624186B2
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antenna
diversity
field strength
electric field
antennas
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JP2006352332A (en
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由晴 石原
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Panasonic Corp
Panasonic Holdings Corp
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Matsushita Electric Industrial Co Ltd
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    • YGENERAL 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
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Description

本発明は、移動体通信システムにおける携帯電話機等の移動局やこの移動局と無線通信を行う基地局に用いて好適なダイバーシチ装置及びダイバーシチ方法に関する。   The present invention relates to a diversity apparatus and a diversity method suitable for use in a mobile station such as a mobile phone in a mobile communication system and a base station that performs radio communication with the mobile station.

移動体通信システムの移動局と基地局との通信においては、様々な電波伝搬環境により受信信号レベルが変動するフェージングを生じる場合が多い。フェージングに対する効果的な対策としてアンテナ選択ダイバーシチ(例えば、特許文献1参照)や合成ダイバーシチがある。   In communication between a mobile station and a base station in a mobile communication system, fading in which the received signal level fluctuates frequently due to various radio wave propagation environments. Effective measures against fading include antenna selection diversity (see, for example, Patent Document 1) and synthesis diversity.

アンテナ選択ダイバーシチでは、通常アンテナを複数個設置して、フェージングで受信状態が悪化したときに条件の良いアンテナを選択して通信を行う。特に、特許文献1では、同一周波数を時分割して複数ユーザで共有するTDMA(Time Division Multiple Access)通信方式におけるアンテナ選択ダイバーシチ装置が開示されており、このアンテナ選択ダイバーシチ装置では、受信部に関係のないタイムスロットの期間中にアンテナの受信信号強度をサンプルし、受信部に関係のあるタイムスロットの受信前に最も良好なアンテナを選択することによりダイバーシチを実現している。他方、合成ダイバーシチ装置では、アンテナと受信系の一部又は全部を2系統用意し、この2系統を同相合成することにより合成利得を得るようにしている。アンテナ選択ダイバーシチ装置では、電波伝搬環境が良いアンテナを使用して、また合成ダイバーシチ装置では、受信2系統を合成して、通信ができるので、通信性能の向上が見込める。
特開平6−140971号公報
In antenna selection diversity, a plurality of normal antennas are installed, and communication is performed by selecting an antenna with good conditions when the reception state deteriorates due to fading. In particular, Patent Literature 1 discloses an antenna selection diversity device in a TDMA (Time Division Multiple Access) communication method in which the same frequency is time-shared and shared by a plurality of users. In this antenna selection diversity device, the antenna selection diversity device is related to the receiving unit. Diversity is realized by sampling the received signal strength of the antenna during a time slot without a blank time and selecting the best antenna before receiving the time slot related to the receiving unit. On the other hand, in the combining diversity device, two or more antennas and receiving systems are prepared, and combined gain is obtained by combining the two systems in phase. In the antenna selection diversity apparatus, communication can be performed by using an antenna having a good radio wave propagation environment, and the combining diversity apparatus can combine two reception systems to perform communication.
JP-A-6-140971

しかしながら、従来のダイバーシチ装置においては、次のような問題がある。
アンテナ選択ダイバーシチ装置においては、TDMA以外の通信方式で、受信部に関係のないタイムスロットの期間が無いものでは、通信中にアンテナ受信レベル測定のための正規な測定時間を持てない。また、通信前のダイバーシチのみでは、通信中の電波伝搬環境変動に対応することができないため、通信中にアンテナ受信レベルを測定するためにアンテナを切り替える必要が生じる。しかし、この場合、通信中の切り替えになることから、測定アンテナの受信レベルが小さいときには受信特性劣化が生じ、アンテナ切り替え時の通信環境の悪化を補うことが難しい。
However, the conventional diversity apparatus has the following problems.
In the antenna selection diversity apparatus, if the communication method other than TDMA and there is no time slot period unrelated to the receiving unit, it is not possible to have a normal measurement time for antenna reception level measurement during communication. In addition, since diversity before communication alone cannot cope with radio wave propagation environment fluctuations during communication, it is necessary to switch antennas to measure the antenna reception level during communication. However, in this case, since switching is performed during communication, when the reception level of the measurement antenna is low, reception characteristics deteriorate, and it is difficult to compensate for the deterioration of the communication environment at the time of antenna switching.

合成ダイバーシチ装置においては、常に2系統の受信部を動作させる必要があり、消費電力が大きくなって、電池で運用する携帯電話機等の移動局では1回の充電で使用できる時間が短くなってしまう。   In the combination diversity device, it is necessary to always operate two systems of receiving units, and power consumption increases, and a mobile station such as a mobile phone operated by a battery shortens the time that can be used by one charge. .

本発明はかかる点に鑑みてなされたものであり、TDMA以外の通信方式において、アンテナ受信レベル測定の際の受信特性劣化を最小限に抑えることができ、さらに低消費電力化が図れるダイバーシチ装置及びダイバーシチ方法を提供することを目的とする。   The present invention has been made in view of the above points, and in a communication system other than TDMA, a diversity apparatus capable of minimizing reception characteristic degradation at the time of antenna reception level measurement and further reducing power consumption, and An object is to provide a diversity method.

(1) ダイバーシチ装置において、少なくとも3本のアンテナと、全ての前記アンテナそれぞれを選択可能なアンテナ選択手段と、前記アンテナ選択手段で選択された前記アンテナにて捉えられた無線信号を受信する2つの受信手段と、2つの前記受信手段それぞれから出力される受信信号を同相合成する合成手段と、受信信号を基に受信電界強度を検出する受信電界強度検出手段と、前記受信電界強度検出手段にて検出された受信電界強度を記憶する記憶手段と、前記アンテナが2本ずつ選択された場合、各2本ずつのアンテナの合成受信信号からそれぞれのアンテナにおける受信電界強度を算出する算出手段と、ダイバーシチ制御用期間に前記アンテナ選択手段を制御して前記アンテナを2本ずつ順次選択して2つの前記受信手段で受信させ、それぞれから出力される受信信号を前記合成手段にて同相合成させて、前記受信電界強度検出手段にて検出された受信電界強度を前記記憶手段に記憶させた後、前記受信電界強度算出手段に対し、前記記憶手段に記憶された各2本ずつのアンテナの合成受信信号の受信電界強度からそれぞれのアンテナにおける受信電界強度を算出させ、算出されたそれぞれのアンテナの受信電界強度のうち、最も値の大きな受信電界強度のアンテナを選択し、合成ダイバーシチからアンテナ選択ダイバーシチに切り替える際に、選択した前記アンテナと接続状態にある前記受信手段を前記受信電界強度検出手段に接続する制御手段と、を具備する構成を採る。 (1) In the diversity device, at least three antennas, an antenna selection unit that can select all the antennas, and two radio signals received by the antennas selected by the antenna selection unit A receiving means, a synthesizing means for synthesizing received signals output from each of the two receiving means, a received electric field strength detecting means for detecting a received electric field strength based on the received signal, and the received electric field strength detecting means. A storage means for storing the detected received electric field strength; a calculating means for calculating the received electric field strength at each antenna from the combined received signals of each two antennas when two antennas are selected; and diversity. During the control period, the antenna selection means is controlled so that the antennas are sequentially selected two by two and received by the two receiving means. The received signal output from each of them is synthesized in phase by the synthesizing unit, and the received electric field strength detected by the received electric field strength detecting unit is stored in the storage unit, and then the received electric field strength calculating unit On the other hand, the reception electric field strength at each antenna is calculated from the reception electric field strength of the combined reception signal of each two antennas stored in the storage means, and among the calculated reception electric field strengths of the respective antennas, A control means for connecting the receiving means connected to the selected antenna to the receiving electric field strength detecting means when selecting an antenna having a large received electric field strength and switching from combining diversity to antenna selection diversity; The structure to comprise is taken.

この構成によれば、少なくとも3本のアンテナから2本ずつ順番に選択し、選択した2本のアンテナを使用して受信して得た受信信号を同相合成し、同相合成受信信号に対して受信電界強度の検出を行いその結果を記憶する。そして、記憶した各2本ずつのアンテナの合成測定結果から、それぞれのアンテナでの受信電界強度を算出する。そして、それぞれのアンテナでの受信電界強度を算出した後、それぞれのアンテナの受信電界強度のうち、最も値の大きな受信電界強度のアンテナを選択する選択し、合成ダイバーシチからアンテナ選択ダイバーシチに切り替える際に、受信電界強度の最も値の大きなアンテナと接続状態にある受信手段を選択し、該受信手段からの受信信号を基に受信電界強度の検出を行う。したがって、TDMA以外の通信方式において、アンテナ受信レベル測定の際には2本のアンテナを使用することから受信特性劣化を最小限に抑えることができ、アンテナ切り替え時の通信環境の悪化を補うことができる。また、合成ダイバーシチとアンテナ選択ダイバーシチとを使用したダイバーシチを行うことから、常時合成ダイバーシチを使用する場合と比べて低消費電力化が図れる。   According to this configuration, two antennas are sequentially selected from at least three antennas, and the received signals obtained by using the two selected antennas are in-phase combined and received with respect to the in-phase combined received signal. The electric field strength is detected and the result is stored. Then, the received electric field strength at each antenna is calculated from the stored combined measurement result of each two antennas. Then, after calculating the received field strength at each antenna, when selecting the antenna with the highest received field strength among the received field strengths of each antenna, and switching from combined diversity to antenna selection diversity Then, the receiving means connected to the antenna having the highest received electric field strength is selected, and the received electric field strength is detected based on the received signal from the receiving means. Therefore, in communication systems other than TDMA, two antennas are used for antenna reception level measurement, so that reception characteristic deterioration can be minimized, and the deterioration of the communication environment during antenna switching can be compensated. it can. In addition, since diversity using combination diversity and antenna selection diversity is performed, power consumption can be reduced as compared to the case where combination diversity is always used.

(2) 上記(1)に記載のダイバーシチ装置において、1本の前記アンテナを使用して受信した無線信号を基にフェージングピッチを検出するフェージングピッチ検出手段を具備する構成を採る。 (2) The diversity apparatus according to the above (1) employs a configuration including fading pitch detection means for detecting a fading pitch based on a radio signal received using one antenna.

この構成によれば、フェージングピッチの値に基づいてダイバーシチ制御用期間中の測定時間長の変更が可能となるので、ダイバーシチ制御用期間における受信電界強度検出の精度向上が図れる。   According to this configuration, the measurement time length during the diversity control period can be changed based on the value of the fading pitch, so that it is possible to improve the accuracy of detection of the received electric field strength during the diversity control period.

(3) 上記(1)又は(2)に記載のダイバーシチ装置において、受信電界強度の値が最も良い2本の前記アンテナと2つの前記受信手段とを使用する合成ダイバーシチを行う感度優先モード、受信電界強度の値が最も良い1本の前記アンテナと1つの前記受信手段とを使用する中間モード及び予め設定された優先順位の高い前記アンテナと1つの前記受信手段とを使用する低消費電力モードの切り替えを手動で行うか自動で行うかを選択するモード選択手段を具備し、前記制御手段は、前記感度優先モード、前記中間モード及び前記低消費電力モードを有し、前記モード選択手段におけるモードの切り替えが手動の場合は、手動選択されたモードを実行し、前記モード選択手段におけるモードの切り替えが自動の場合は、データ受信の有無と受信データ量に基づいてモード選択を行い実行する構成を採る。 (3) In the diversity apparatus according to (1) or (2) above, a sensitivity priority mode for performing combined diversity using the two antennas having the best value of the received electric field strength and the two receiving means, and reception An intermediate mode using one antenna and one receiving means having the best value of electric field strength, and a low power consumption mode using one antenna and one receiving means having a preset high priority. Mode selection means for selecting whether to perform switching manually or automatically, and the control means has the sensitivity priority mode, the intermediate mode and the low power consumption mode, and the mode selection means When the switching is manual, the mode selected manually is executed. When the mode switching by the mode selection means is automatic, the presence of data reception is performed. A configuration for performing performs mode selection based on the received data amount and.

この構成によれば、感度優先モード、低消費電力モード及びその中間モードの選択を自動と手動のいずれか一方にて行うことが可能となり、合成ダイバーシチの効果と低消費電力を使用状態に応じて切り替えることが可能となる。   According to this configuration, the sensitivity priority mode, the low power consumption mode, and the intermediate mode can be selected either automatically or manually, and the effect of combining diversity and the low power consumption can be selected according to the use state. It is possible to switch.

(4) 上記(3)に記載のダイバーシチ装置において、電池残量を検出する電池残量検出手段を備え、前記制御手段は、前記モード選択手段におけるモード選択が如何なる場合であっても電池残量が一定量より少なくなったときには強制的に低消費電力モードに切り替える構成を採る。 (4) The diversity apparatus according to (3), further comprising a battery remaining amount detecting unit that detects a remaining battery level, wherein the control unit is operable regardless of the mode selection by the mode selecting unit. When the value becomes less than a certain amount, a configuration for forcibly switching to the low power consumption mode is adopted.

この構成によれば、電池残量を検出してそれが一定量以下となった場合には、モード選択が如何なる場合であっても強制的に低消費電力モードに切り替えるので、電池残量が少なくなったときの通信可能時間の延長化が図れる。   According to this configuration, when the remaining battery level is detected and becomes less than a certain level, the mode is forcibly switched to the low power consumption mode regardless of the mode selection. If this happens, the communication time can be extended.

(5) 移動体通信システムの移動局において、上記(1)から(4)のいずれかに記載のダイバーシチ装置を具備する構成を採る。 (5) The mobile station of the mobile communication system adopts a configuration including the diversity device according to any one of (1) to (4) above.

(6) 移動体通信システムの基地局において、上記(1)から(4)のいずれかに記載のダイバーシチ装置を具備する構成を採る。 (6) The base station of the mobile communication system adopts a configuration including the diversity device according to any one of (1) to (4) above.

(7) ダイバーシチ方法において、ダイバーシチ制御用期間に少なくとも3本のアンテナから2本ずつ順番に選択し、選択した2本のアンテナを使用して2つの受信部で受信して得た受信信号を同相合成し、さらに合成受信信号の受信電界強度測定を行ってその結果を保存し、各2本ずつのアンテナの選択を全て行った後に、保存している各2本ずつのアンテナの合成測定結果からそれぞれのアンテナでの受信電界強度を算出し、合成ダイバーシチからアンテナ選択ダイバーシチに切り替える際には、算出したそれぞれアンテナでの受信電界強度のうち、最も値の大きい受信電界強度のアンテナを使用アンテナとして選択するとともに、2つの受信部のうち一方を前記使用アンテナに割り当てる。 (7) In the diversity method, in the diversity control period, at least two antennas are selected in order from the three antennas, and the received signals obtained by the two receiving units using the two selected antennas are in phase. After combining, further measuring the received electric field strength of the combined received signal, storing the result, selecting all two antennas, and then storing the combined measurement results for each two stored antennas. When calculating the received electric field strength at each antenna and switching from combining diversity to antenna selection diversity, select the antenna with the highest received electric field strength among the calculated received electric field strengths as the antenna to be used. In addition, one of the two receiving units is assigned to the antenna used.

この方法によれば、TDMA以外の通信方式において、アンテナ受信レベル測定の際には2本のアンテナを使用することから受信特性劣化を最小限に抑えることができ、アンテナ切り替え時の通信環境の悪化を補うことができる。また、合成ダイバーシチとアンテナ選択ダイバーシチとを使用したダイバーシチを行うことから、常時合成ダイバーシチを使用する場合と比べて低消費電力化が図れる。   According to this method, in the communication method other than TDMA, since two antennas are used when measuring the antenna reception level, it is possible to minimize reception characteristic deterioration, and deterioration of the communication environment at the time of antenna switching. Can be supplemented. In addition, since diversity using combination diversity and antenna selection diversity is performed, power consumption can be reduced as compared to the case where combination diversity is always used.

本発明は、TDMA以外の通信方式において、アンテナ受信レベル測定の際の受信特性劣化を最小限に抑えることができ、さらに低消費電力化が図れる。   According to the present invention, in communication methods other than TDMA, it is possible to minimize the degradation of reception characteristics when measuring the antenna reception level, and to further reduce power consumption.

以下、本発明の実施の形態について、図面を参照して詳細に説明する。   Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(実施の形態1)
図1は、本発明の実施の形態1に係るダイバーシチ装置の概略構成を示すブロック図である。この図において、本実施の形態のダイバーシチ装置1は、3本のアンテナ2〜4と、アンテナスイッチ5と、2つの受信部6及び7と、合成部8と、合成ダイバーシチオン/オフスイッチ9と、受信電界強度検出部10、記憶部11と、算出部12と、制御部13と、受信部切替スイッチ14とを備えて構成される。なお、本実施の形態のダイバーシチ装置は、移動体通信システムの携帯電話機等の移動局に適用したものであるが、この移動局と無線通信を行う基地局に用いても構わない。
(Embodiment 1)
FIG. 1 is a block diagram showing a schematic configuration of a diversity apparatus according to Embodiment 1 of the present invention. In this figure, the diversity apparatus 1 according to the present embodiment includes three antennas 2 to 4, an antenna switch 5, two receiving units 6 and 7, a combining unit 8, and a combining diversity on / off switch 9. The reception electric field strength detection unit 10, the storage unit 11, the calculation unit 12, the control unit 13, and the reception unit changeover switch 14 are configured. The diversity apparatus according to the present embodiment is applied to a mobile station such as a mobile phone of a mobile communication system, but may be used for a base station that performs radio communication with the mobile station.

3本のアンテナ2〜4は、それぞれ無線信号の受信に用いられる。アンテナスイッチ5は、6つの接点5a〜5fを有し、接点5a及び5bそれぞれの一端が共通接続されてアンテナ2に接続され、接点5aの他端が受信部6の入力端に、接点5bの他端が受信部7の入力端にそれぞれ接続される。同様に、接点5c及び5dそれぞれの一端が共通接続されてアンテナ3に接続され、接点5cの他端が受信部6の入力端に、接点5dの他端が受信部7の入力端にそれぞれ接続される。また、接点5e及び5fそれぞれの一端が共通接続されてアンテナ4に接続され、接点5eの他端が受信部6の入力端に、接点5fの他端が受信部7の入力端にそれぞれ接続される。アンテナスイッチ5は、制御部13からの切り替え信号S1に従って6つの接点5a〜5fそれぞれをオン、オフする。   The three antennas 2 to 4 are used for receiving radio signals. The antenna switch 5 has six contacts 5a to 5f. One end of each of the contacts 5a and 5b is connected in common and connected to the antenna 2, the other end of the contact 5a is connected to the input end of the receiving unit 6, and the contact 5b The other end is connected to the input end of the receiving unit 7. Similarly, one end of each of the contacts 5c and 5d is commonly connected and connected to the antenna 3, the other end of the contact 5c is connected to the input end of the receiving unit 6, and the other end of the contact 5d is connected to the input end of the receiving unit 7. Is done. Also, one end of each of the contacts 5e and 5f is connected in common and connected to the antenna 4, the other end of the contact 5e is connected to the input end of the receiving unit 6, and the other end of the contact 5f is connected to the input end of the receiving unit 7. The The antenna switch 5 turns each of the six contacts 5a to 5f on and off in accordance with the switching signal S1 from the control unit 13.

受信部6及び7は、アンテナ2〜4で捉えられた無線信号を増幅、選別及び復調等を行い、受信信号として出力する。合成部8は、受信部6からの受信信号と受信部7からの受信信号とを同相合成し、その結果を出力する。合成ダイバーシチオン/オフスイッチ9は、合成ダイバーシチを行うか否かの切り替えを行うものであり、その接点cが受信電界強度検出部10の入力端に、接点aが合成部8の出力端に、接点bが受信部切替スイッチ14の接点cにそれぞれ接続されて、制御部13からの切り替え信号S2に従って接点cの切り替えを行う。この場合、接点cが接点a側に接続することで合成ダイバーシチオンとなり、接点b側に接続することで合成ダイバーシチオフとなる。   The receiving units 6 and 7 amplify, select, and demodulate the radio signals captured by the antennas 2 to 4 and output them as received signals. The synthesizing unit 8 performs in-phase synthesis of the received signal from the receiving unit 6 and the received signal from the receiving unit 7 and outputs the result. The synthesis diversity on / off switch 9 switches whether or not to perform synthesis diversity. The contact c is at the input end of the received electric field strength detection unit 10 and the contact a is at the output end of the synthesis unit 8. The contact point b is connected to the contact point c of the receiving unit changeover switch 14, and the contact point c is switched according to the switching signal S2 from the control unit 13. In this case, the combination diversity is turned on when the contact c is connected to the contact a side, and the synthesis diversity is turned off when the contact c is connected to the contact b side.

受信電界強度検出部10は、RSSI(Received Signal Strength Indicator)測定等の受信電界強度を測定し、その結果を記憶部11に入力する。記憶部11は、受信電界強度検出部10からの受信電界強度測定結果を記憶する。本実施の形態では、各2本ずつのアンテナの合成測定結果を記憶する。算出部12は、複数の合成ダイバーシチのRSSI等測定結果からアンテナ2〜4それぞれにおける受信電界強度を算出する。制御部13は、図示せぬCPU、プログラムメモリ、ワークメモリ等から構成され、装置各部を制御する。受信部切替スイッチ14は、合成ダイバーシチからアンテナ選択ダイバーシチに切り替える際に、優先順位の高いアンテナを選択している側の受信部6又は7のいずれか一方を選択するためのものであり、その接点cが合成ダイバーシチオン/オフスイッチ9の接点bに、接点aが受信部7の出力端に、接点bが受信部6の出力端にそれぞれ接続され、制御部13からの切り替え信号S3に従って接点cの切り替えを行う。   The received electric field strength detection unit 10 measures the received electric field strength such as RSSI (Received Signal Strength Indicator) measurement and inputs the result to the storage unit 11. The storage unit 11 stores the reception field strength measurement result from the reception field strength detection unit 10. In the present embodiment, the combined measurement result of each two antennas is stored. The calculation part 12 calculates the received electric field strength in each of the antennas 2 to 4 from the measurement results such as RSSI of a plurality of combined diversity. The control unit 13 includes a CPU (not shown), a program memory, a work memory, and the like, and controls each unit of the apparatus. The receiving unit changeover switch 14 is for selecting either the receiving unit 6 or 7 on the side of selecting the antenna having a higher priority when switching from combining diversity to antenna selection diversity. c is connected to the contact b of the composite diversity on / off switch 9, the contact a is connected to the output end of the receiving unit 7, the contact b is connected to the output end of the receiving unit 6, and the contact c is switched according to the switching signal S3 from the control unit 13. Switch.

制御部13は、ダイバーシチ制御用期間に、アンテナスイッチ5、合成ダイバーシチオン/オフスイッチ9及び受信部切替スイッチ14の切り替え制御を行うとともに、受信電界強度検出部10に対して受信電界強度検出を指示し、さらに算出部12に対して各アンテナ2〜4における受信電界強度算出を指示する。特に、合成ダイバーシチを行うときは、合成ダイバーシチオン/オフスイッチ9の接点cを接点a側に接続し、合成ダイバーシチからアンテナ選択ダイバーシチに切り替える際には、合成ダイバーシチオン/オフスイッチ9の接点cを接点b側に接続するとともに受信部切替スイッチ14の接点cを接点a又は接点bのいずれか一方に接続する。なお、受信部切替スイッチ14の切り替えにおいては、優先順位の高いアンテナを選択している側の受信部6又は受信部7を選択する方の接点に接続する。   The control unit 13 performs switching control of the antenna switch 5, the combined diversity on / off switch 9, and the reception unit switch 14 during the diversity control period, and instructs the reception field strength detection unit 10 to detect reception field strength. Furthermore, the calculation unit 12 is instructed to calculate the received electric field strength in each of the antennas 2 to 4. In particular, when performing synthesis diversity, the contact c of the synthesis diversity on / off switch 9 is connected to the contact a side, and when switching from synthesis diversity to antenna selection diversity, the contact c of the synthesis diversity on / off switch 9 is changed. In addition to being connected to the contact b side, the contact c of the receiving unit changeover switch 14 is connected to either the contact a or the contact b. In the switching of the receiving unit changeover switch 14, the receiving unit 6 or the receiving unit 7 on the side of selecting the antenna having the higher priority is connected to the contact point for selecting.

以上のように構成されたダイバーシチ装置1について、図2に示すフロー図を参照してその動作を説明する。   The operation of the diversity apparatus 1 configured as described above will be described with reference to the flowchart shown in FIG.

制御部13は、まずダイバーシチ制御用期間かどうかを判定し(ステップS201)、ダイバーシチ制御用期間でなければ、ダイバーシチ制御用期間に至るまで通常受信を行う(ステップS202)。ダイバーシチ制御用期間に至ると、合成ダイバーシチをオンにする切り替え信号S2を合成ダイバーシチオン/オフスイッチ9に入力する(ステップS203)。これより、合成ダイバーシチオン/オフスイッチ9の接点cが接点a側に設定されて、合成ダイバーシチが開始される。制御部13は、合成ダイバーシチを開始すると、まずは測定アンテナとして、アンテナ2及び3を選択するための切り替え信号S1を出力する(ステップS204)。この場合、まずアンテナ2の接点5aとアンテナ3の5dそれぞれをオンにする切り替え信号S1を出力する。これにより、アンテナ2で捉えられた無線信号が受信部6に入力され、またアンテナ3で捉えられた無線信号が受信部7に入力される。   The control unit 13 first determines whether or not it is a diversity control period (step S201), and if it is not a diversity control period, performs normal reception until the diversity control period is reached (step S202). When the diversity control period is reached, a switching signal S2 for turning on the diversity is input to the synthesis diversity on / off switch 9 (step S203). Thus, the contact c of the combination diversity on / off switch 9 is set to the contact a side, and the combination diversity is started. When the combining diversity is started, the control unit 13 first outputs a switching signal S1 for selecting the antennas 2 and 3 as measurement antennas (step S204). In this case, first, a switching signal S1 for turning on each of the contact 5a of the antenna 2 and 5d of the antenna 3 is output. As a result, the radio signal captured by the antenna 2 is input to the receiving unit 6, and the radio signal captured by the antenna 3 is input to the receiving unit 7.

次いで、アンテナ2及び3で捉えられた無線信号に対して受信電界強度の検出を行う(ステップS205)。この場合、アンテナ2で捉えられた無線信号が受信部6に入力され、アンテナ3で捉えられた無線信号が受信部7に入力されることで、受信部6及び7それぞれからの受信信号が合成部8に入力される。合成部8では、受信部6及び7から入力された受信信号を同相合成する。同相合成された受信信号は、合成ダイバーシチオン/オフスイッチ9を介して受信電界強度検出部10に入力される。受信受信電界強度検出部10は、入力された受信信号に対し、RSSI等の受信電界強度測定を行い、その測定結果を記憶部11に記憶させる(ステップS206)。   Next, the received electric field strength is detected for the radio signals captured by the antennas 2 and 3 (step S205). In this case, a radio signal captured by the antenna 2 is input to the reception unit 6, and a radio signal captured by the antenna 3 is input to the reception unit 7, so that the reception signals from the reception units 6 and 7 are combined. Input to section 8. The synthesizing unit 8 performs in-phase synthesis of the received signals input from the receiving units 6 and 7. The in-phase combined reception signal is input to the reception electric field strength detection unit 10 via the combination diversity on / off switch 9. The reception / reception field strength detection unit 10 performs reception field strength measurement such as RSSI on the input reception signal, and stores the measurement result in the storage unit 11 (step S206).

アンテナ2及び3による受信電界強度測定を行って、その結果を記憶部11に記憶させた後、アンテナ3及び4を選択するための切り替え信号S1を出力する(ステップS207)。この場合、アンテナ3の接点5cとアンテナ4の接点5fそれぞれをオンにする切り替え信号S1を出力する。これにより、アンテナ3で捉えられた無線信号が受信部6に入力され、アンテナ4で捉えられた無線信号が受信部7に入力される。そして、アンテナ3及び4で捉えられた無線信号に対して受信電界強度の検出を行う(ステップS208)。この場合、アンテナ3で捉えられた無線信号が受信部6に入力され、アンテナ4で捉えられた無線信号が受信部7に入力されることで、受信部6及び7それぞれからの受信信号が合成部8に入力される。合成部8では、受信部6及び7から入力された受信信号を同相合成する。そして、同相合成された受信信号が合成ダイバーシチオン/オフスイッチ9を介して受信電界強度検出部10に入力される。受信電界強度検出部10は、入力された受信信号に対し、RSSI等の受信電界強度測定を行い、その測定結果を記憶部11に記憶させる(ステップS209)。   The reception electric field strength measurement by the antennas 2 and 3 is performed, the result is stored in the storage unit 11, and then the switching signal S1 for selecting the antennas 3 and 4 is output (step S207). In this case, a switching signal S1 for turning on the contact 5c of the antenna 3 and the contact 5f of the antenna 4 is output. As a result, the radio signal captured by the antenna 3 is input to the receiving unit 6, and the radio signal captured by the antenna 4 is input to the receiving unit 7. Then, the received electric field strength is detected for the radio signals captured by the antennas 3 and 4 (step S208). In this case, a radio signal captured by the antenna 3 is input to the reception unit 6, and a radio signal captured by the antenna 4 is input to the reception unit 7, so that the reception signals from the reception units 6 and 7 are combined. Input to section 8. The synthesizing unit 8 performs in-phase synthesis of the received signals input from the receiving units 6 and 7. Then, the reception signal combined in phase is input to the reception electric field strength detection unit 10 via the combination diversity on / off switch 9. The reception field strength detection unit 10 performs reception field strength measurement such as RSSI on the input reception signal, and stores the measurement result in the storage unit 11 (step S209).

アンテナ3及び4による受信電界強度測定を行い、その結果を記憶部11に記憶させた後、制御部13は、アンテナ4及び2を選択するための切り替え信号S1を出力する(ステップS210)。この場合、アンテナ4の接点5eとアンテナ2の接点5bそれぞれをオンにする切り替え信号S1を出力する。これにより、アンテナ4で捉えられた無線信号が受信部6に入力され、アンテナ2で捉えられた無線信号が受信部7に入力される。次いで、アンテナ4及び2で捉えられた無線信号に対して受信電界強度の検出を行う(ステップS211)。この場合、アンテナ4で捉えられた無線信号が受信部6に入力され、アンテナ2で捉えられた無線信号が受信部7に入力されることで、受信部6及び7それぞれからの受信信号が合成部8に入力される。合成部8では、受信部6及び7から入力された受信信号を同相合成する。そして、同相合成された受信信号が合成ダイバーシチオン/オフスイッチ9を介して受信電界強度検出部10に入力される。受信電界強度検出部10は、入力された受信信号に対し、RSSI等の受信電界強度測定を行い、その測定結果を記憶部11に記憶させる(ステップS212)。   After measuring the received electric field strength by the antennas 3 and 4 and storing the result in the storage unit 11, the control unit 13 outputs a switching signal S1 for selecting the antennas 4 and 2 (step S210). In this case, a switching signal S1 for turning on the contact 5e of the antenna 4 and the contact 5b of the antenna 2 is output. Thereby, the radio signal captured by the antenna 4 is input to the receiving unit 6, and the radio signal captured by the antenna 2 is input to the receiving unit 7. Next, the received electric field strength is detected for the radio signals captured by the antennas 4 and 2 (step S211). In this case, a radio signal captured by the antenna 4 is input to the reception unit 6, and a radio signal captured by the antenna 2 is input to the reception unit 7, so that the reception signals from the reception units 6 and 7 are combined. Input to section 8. The synthesizing unit 8 performs in-phase synthesis of the received signals input from the receiving units 6 and 7. Then, the in-phase combined received signal is input to the received electric field strength detecting unit 10 via the combining diversity on / off switch 9. The received electric field strength detection unit 10 performs received electric field strength measurement such as RSSI on the input received signal, and stores the measurement result in the storage unit 11 (step S212).

アンテナ4及び2による受信電界強度測定を行い、その結果を記憶部11に記憶させた後、制御部13は、算出部12を用いて複数の合成ダイバーシチのRSSI等測定結果から、アンテナ2〜4それぞれによる受信電界強度を算出する(ステップS213)。この算出方法は、アンテナ2〜4の場合、アンテナ2+アンテナ3、アンテナ3+アンテナ4、アンテナ4+アンテナ2の3つの合成ダイバーシチによるRSSI測定結果があるため、代入法等によりそれぞれのアンテナ2〜4における受信電界強度を算出することが可能である。各アンテナ2〜4の受信電界強度の算出後、合成ダイバーシチからアンテナ選択ダイバーシチに切り替える際、アンテナ2〜4それぞれによる受信電界強度を基に使用アンテナの選択を行う(ステップS214)。   After measuring the received electric field strength by the antennas 4 and 2 and storing the result in the storage unit 11, the control unit 13 uses the calculation unit 12 to calculate the antennas 2 to 4 from the measurement results of RSSI and the like of a plurality of combined diversity. The received electric field strength is calculated for each (step S213). In the case of antennas 2 to 4, this calculation method has an RSSI measurement result by three combined diversity of antenna 2 + antenna 3, antenna 3 + antenna 4, and antenna 4 + antenna 2. The received electric field strength can be calculated. After the reception field strengths of the antennas 2 to 4 are calculated, the antenna to be used is selected based on the reception field strengths of the antennas 2 to 4 when switching from combining diversity to antenna selection diversity (step S214).

使用アンテナの選択を行った後は、選択した使用アンテナに対し、受信部6又は7のいずれか一方に割り当てる(ステップS215)。例えば、選択したアンテナがアンテナ2であり、このアンテナ2が例えば受信部6に接続された状態であれば、その受信部6を選択するために、受信部切替スイッチ14の接点cを接点a側に接続する。   After the used antenna is selected, the selected used antenna is assigned to either the receiving unit 6 or 7 (step S215). For example, if the selected antenna is the antenna 2 and the antenna 2 is connected to the receiving unit 6, for example, the contact c of the receiving unit changeover switch 14 is set to the contact a side in order to select the receiving unit 6. Connect to.

ダイバーシチ制御用期間は、一定期間ごとに発生し、その都度上記処理を繰り返す。なお、ダイバーシチ制御用期間は、受信電界強度検出部10の結果が一定の閾値よりも劣化した場合に発生するようにしても良い。   The diversity control period is generated at regular intervals, and the above process is repeated each time. Note that the diversity control period may be generated when the result of the reception electric field strength detection unit 10 is deteriorated below a certain threshold.

このように本実施の形態のダイバーシチ装置1によれば、3本のアンテナ2〜4から2本ずつ順番に選択し、選択した2本のアンテナを使用して受信して得た受信信号を同相合成し、同相合成受信信号に対して受信電界強度の検出を行い、その結果を記憶する。そして、記憶した各2本ずつのアンテナの合成測定結果から、それぞれのアンテナ2〜4での受信電界強度を算出する。そして、各アンテナ2〜4での受信電界強度を算出した後、各アンテナ2〜4の受信電界強度のうち、最も値の大きな受信電界強度のアンテナを選択し、合成ダイバーシチからアンテナ選択ダイバーシチに切り替える際には、受信電界強度の最も値の大きなアンテナと接続状態にある受信部6又は7を選択し、該受信部からの受信信号を基に受信電界強度の検出を行う。したがって、TDMA以外の通信方式において、アンテナ受信レベル測定の際には2本のアンテナを使用することから受信特性劣化を最小限に抑えることができ、アンテナ切り替え時の通信環境の悪化を補うことができる。また、合成ダイバーシチとアンテナ選択ダイバーシチとを使用したダイバーシチを行うことから、常時合成ダイバーシチを使用する場合と比べて低消費電力化が図れる。   As described above, according to the diversity apparatus 1 of the present embodiment, two antennas 2 to 4 are selected in order, and received signals obtained by using the selected two antennas are in-phase. The received electric field strength is detected for the in-phase combined received signal, and the result is stored. And the received electric field strength in each antenna 2-4 is calculated from the synthetic | combination measurement result of each two antennas memorize | stored. Then, after calculating the received electric field strength at each of the antennas 2 to 4, the antenna having the largest received electric field strength is selected from the received electric field strengths of the respective antennas 2 to 4, and switching from combined diversity to antenna selection diversity is performed. At this time, the receiving unit 6 or 7 connected to the antenna having the largest received electric field strength is selected, and the received electric field strength is detected based on the received signal from the receiving unit. Therefore, in communication systems other than TDMA, two antennas are used for antenna reception level measurement, so that reception characteristic deterioration can be minimized, and the deterioration of the communication environment during antenna switching can be compensated. it can. In addition, since diversity using combination diversity and antenna selection diversity is performed, power consumption can be reduced as compared to the case where combination diversity is always used.

(実施の形態2)
図3は、本発明の実施の形態2に係るダイバーシチ装置の概略構成を示すブロック図である。この図において、本実施の形態のダイバーシチ装置15は、1本のアンテナで無線信号を受信した際の受信電界強度を基に通信環境下のフェージングピッチを検出するフェージングピッチ検出部16と、フェージングピッチ検出部16で検出されたフェージングピッチを基にダイバーシチ制御用期間中のアンテナ測定時間を決定する機能を有する制御部13Aとを備えており、これら以外は上述した実施の形態1のダイバーシチ装置1と同一の構成を採る。なお、実施の形態1のダイバーシチ装置1と共通する部分には同じ符号を付けてその説明を省略する。
(Embodiment 2)
FIG. 3 is a block diagram showing a schematic configuration of the diversity apparatus according to Embodiment 2 of the present invention. In this figure, the diversity device 15 according to the present embodiment includes a fading pitch detection unit 16 that detects a fading pitch in a communication environment based on a received electric field strength when a radio signal is received by one antenna, and a fading pitch. A control unit 13A having a function of determining an antenna measurement time during the diversity control period based on the fading pitch detected by the detection unit 16, and the diversity apparatus 1 of the first embodiment described above except for these. Take the same configuration. In addition, the same code | symbol is attached | subjected to the part which is common with the diversity apparatus 1 of Embodiment 1, and the description is abbreviate | omitted.

図4は、本実施の形態に係るダイバーシチ装置15のフェージングピッチ検出処理を示すフロー図である。まず、制御部13Aは、フェージングピッチ検出期間において、合成ダイバーシチオン/オフスイッチ9がオンであるか否かを判定する(ステップS401)。同スイッチ9がオンである場合はそれをオフにし、合成ダイバーシチをオフにする(ステップS402)。すなわち、合成ダイバーシチオン/オフスイッチ9の接点cを接点b側に接続する。このようにするのは、図5に示すように合成ダイバーシチを行っていると、フェージングによる影響が軽減することが考えられるので、フェージングピッチ検出精度が悪化するためである。なお、図5において、アンテナA、Bは、例えばアンテナ2、3である。   FIG. 4 is a flowchart showing fading pitch detection processing of diversity apparatus 15 according to the present embodiment. First, the control unit 13A determines whether or not the synthesis diversity on / off switch 9 is on during the fading pitch detection period (step S401). If the switch 9 is on, it is turned off, and the synthesis diversity is turned off (step S402). That is, the contact c of the synthesis diversity on / off switch 9 is connected to the contact b side. This is because the fading pitch detection accuracy is deteriorated because the influence of fading can be reduced if the combining diversity is performed as shown in FIG. In FIG. 5, antennas A and B are antennas 2 and 3, for example.

合成ダイバーシチオン/オフスイッチ9がオフの場合はそのままの状態でフェージングピッチの検出を行い、合成ダイバーシチオン/オフスイッチ9がオンの場合はオフにした後にフェージングピッチ検出を行う(ステップS403)。そして、フェージングピッチ検出を行った後、検出したフェージングピッチを基にダイバーシチ制御用期間中のアンテナ測定時間を決定する(ステップS404)。以上の処理を一定時間間隔ごとに行う(ステップS405)ことにより、フェージングピッチの変化に追従してアンテナ測定時間を変化させることが可能となる。   When the synthesis diversity on / off switch 9 is off, the fading pitch is detected as it is, and when the synthesis diversity on / off switch 9 is on, the fading pitch is detected after being turned off (step S403). Then, after performing the fading pitch detection, the antenna measurement time during the diversity control period is determined based on the detected fading pitch (step S404). By performing the above processing at regular time intervals (step S405), it is possible to change the antenna measurement time following the change in fading pitch.

このように本実施の形態のダイバーシチ装置15によれば、フェージングピッチを検出して、フェージングピッチの変化に追従してアンテナ測定時間を変化させるので、ダイバーシチ制御用期間における受信電界強度検出の精度向上が図れる。   As described above, according to the diversity device 15 of the present embodiment, the fading pitch is detected, and the antenna measurement time is changed following the change of the fading pitch. Therefore, the accuracy of detection of the received electric field strength in the diversity control period is improved. Can be planned.

(実施の形態3)
図6は、本発明の実施の形態3に係るダイバーシチ装置の概略構成を示すブロック図である。この図において、本実施の形態のダイバーシチ装置17は、受信電界強度の値が最も良い2本のアンテナと2つの受信部6及び7とを使用する合成ダイバーシチを行う感度優先モード、受信電界強度の値が最も良い1本のアンテナと1つの受信部6又は7とを使用する中間モード、予め設定された優先順位の高いアンテナと1つの受信部6又は7とを使用する低消費電力モードの3つのモードを実行する機能を備えた制御部13Bと、制御部13Bの各モードの切り替えを手動で行うか自動で行うかを選択するモード選択部18とを備えており、これら以外は上述した実施の形態1及び2のダイバーシチ装置1、15と同一の構成を採る。当然ながら実施の形態1及び2と共通する部分には同じ符号を付けてその説明を省略する。
(Embodiment 3)
FIG. 6 is a block diagram showing a schematic configuration of a diversity apparatus according to Embodiment 3 of the present invention. In this figure, the diversity device 17 according to the present embodiment has a sensitivity priority mode for performing combined diversity using two antennas and two receiving units 6 and 7 having the best value of the received electric field strength, and the received electric field strength. 3 in an intermediate mode using one antenna and one receiving unit 6 or 7 having the best value, and a low power consumption mode using an antenna having a preset high priority and one receiving unit 6 or 7 A control unit 13B having a function of executing one mode, and a mode selection unit 18 for selecting whether to switch each mode of the control unit 13B manually or automatically. The same configuration as the diversity devices 1 and 15 of the first and second embodiments is adopted. As a matter of course, the same reference numerals are given to portions common to the first and second embodiments, and description thereof is omitted.

図7は、本実施の形態に係るダイバーシチ装置17の動作を示すフロー図である。まず、制御部13Bは、モード選択部18による設定が自動モード切替かどうかを判定し(ステップS701)、自動モード切替の場合はデータ受信中(もしくはデータ受信開始の直前)か否かを判定し(ステップS703)、データ受信中であればそのデータ量がある定められた一定量以上か否かを判定する(ステップS704)。データ量が一定量以上である場合は、感度優先モードに設定する(ステップS705)。   FIG. 7 is a flowchart showing the operation of the diversity device 17 according to the present embodiment. First, the control unit 13B determines whether or not the setting by the mode selection unit 18 is automatic mode switching (step S701), and in the case of automatic mode switching, determines whether or not data reception is in progress (or just before starting data reception). (Step S703) If data is being received, it is determined whether or not the amount of data is greater than a predetermined amount (step S704). If the data amount is a certain amount or more, the sensitivity priority mode is set (step S705).

ダイバーシチ制御用期間中のアンテナ測定期間となると、制御部13Bは、合成ダイバーシチオン/オフスイッチ9とアンテナスイッチ5の切り替えを行い、受信電界強度検出部10により、2本のアンテナと2系統の受信部6及び7を用いたフル合成ダイバーシチによる受信電界強度検出を行う(ステップS706)。これは、1本ずつアンテナを替えながらRSSI測定を行う。この測定を終えると、測定結果の最も良いアンテナ2本を選択する。そして、選択した2本のアンテナと2系統の受信部6及び7によるフル合成ダイバーシチによる受信を行う(ステップS707)。ステップS706及び707によるアンテナ測定はアンテナ測定期間が訪れるたびに行い(ステップS708)、一定期間経過ごとに自動モード切替か否かの検出を行う(ステップS709)。   When the antenna measurement period during the diversity control period is reached, the control unit 13B switches between the combination diversity on / off switch 9 and the antenna switch 5, and the reception field strength detection unit 10 receives two antennas and two systems. The received electric field strength is detected by full synthesis diversity using the units 6 and 7 (step S706). This performs RSSI measurement while changing antennas one by one. When this measurement is completed, the two antennas with the best measurement results are selected. Then, reception by full combining diversity is performed by the selected two antennas and the two systems of receiving units 6 and 7 (step S707). The antenna measurement in steps S706 and 707 is performed every time the antenna measurement period comes (step S708), and it is detected whether or not the automatic mode is switched every time a certain period elapses (step S709).

上記ステップS704におけるデータ量検出の際に、データ量が一定量より少なかった場合は、中間モードに設定する(ステップS710)。中間モードに移行すると、フル合成ダイバーシチによる受信電界強度検出を行い(ステップS706)、その後、合成ダイバーシチによる効果が一定量以上か否かの判定を行う(ステップS711)。これは、算出部12により求められたアンテナ2〜4それぞれの算出結果と合成ダイバーシチによる電界強度の比較により行い、一定量以上であれば測定結果の最も良いアンテナ2本と2系統の受信部6及び7によるフル合成ダイバーシチによる受信を行う(ステップS707)。これは、アンテナ1本と1系統の受信部による電界強度の中で最も良いものに対して、合成利得が例えば閾値を2dBとした場合、2dB以上良ければ合成ダイバーシチを選択するという制御である。   When the data amount is detected in step S704, if the data amount is less than a certain amount, the intermediate mode is set (step S710). When the mode is shifted to the intermediate mode, reception field strength detection by full combining diversity is performed (step S706), and then it is determined whether or not the effect of combining diversity is a certain amount or more (step S711). This is performed by comparing the calculation results of the antennas 2 to 4 obtained by the calculation unit 12 and the electric field intensity by the combining diversity. If the amount is equal to or larger than a certain amount, the two antennas having the best measurement results and the two receiving units 6 are used. And 7 are received by full synthesis diversity (step S707). This is a control for selecting the combination diversity when the combination gain is 2 dB or more when the combination gain is 2 dB for the best electric field strength among the one antenna and one system of receiving units.

このような状態は、図8の(a)に示すような2系統の電界強度が同等の場合に該当する。反対に合成利得が例えば2dB未満の場合は、測定結果の良いアンテナ1本と受信系1系統による受信を行う(ステップS712)。このような状態は、図8の(b)に示すような2系統の電界強度に差がある場合に該当する。また、このときの切り替え制御としては、受信状態が良いアンテナを選択している側の受信部を、受信部切替スイッチ14で選択してから、合成ダイバーシチオン/オフスイッチ9をオフすることにより、アンテナ切り替え時の受信状態悪化を防ぐことができる。アンテナ測定は、アンテナ測定期間が訪れる度に行い(ステップS713)、一定期間経過ごとに自動モード切替か否かの検出を行う(ステップS714)。   Such a state corresponds to a case where the electric field strengths of the two systems are the same as shown in FIG. On the other hand, when the combined gain is less than 2 dB, for example, reception is performed with one antenna and one receiving system with good measurement results (step S712). Such a state corresponds to a case where there is a difference in electric field intensity between the two systems as shown in FIG. Further, as the switching control at this time, by selecting the receiving unit on the side where the antenna having a good reception state is selected by the receiving unit switching switch 14, the synthetic diversity on / off switch 9 is turned off, It is possible to prevent the reception state from deteriorating when switching antennas. The antenna measurement is performed every time the antenna measurement period comes (step S713), and it is detected whether or not the automatic mode is switched every time a certain period of time elapses (step S714).

上記ステップS703のデータ受信検出結果が、データ受信を行っていない待ち受け時等の場合は、モード選択部18により低消費電力モードに設定する(ステップS715)。低消費電力モードでは、アンテナ2〜4それぞれの優先順位を使用状態(通話やiモード(NTTドコモの登録商標)等)ごとに予め定めておいて、優先順位の高いアンテナ1本を選択し(ステップS716)、受信系1系統での受信を行う(ステップS717)。そして、RSSIが指定した閾値よりも低下した場合(ステップS718)は、優先順位が次に高いアンテナに切替を行う(ステップS719)。このRSSIの閾値は、この低消費電力モードの意味を考慮し、受信環境が著しく劣化する値とすることが望ましい。自動モード切替か否かの検出は、一定期間経過ごとに行う(ステップS720)。   If the data reception detection result in step S703 is, for example, when no data is being received, the mode selection unit 18 sets the low power consumption mode (step S715). In the low power consumption mode, the priority order of each of the antennas 2 to 4 is determined in advance for each use state (call, i-mode (registered trademark of NTT DOCOMO, etc.)), and one antenna with a high priority order is selected ( In step S716), reception is performed by one receiving system (step S717). When the RSSI is lower than the specified threshold value (step S718), switching to the next highest priority antenna is performed (step S719). The RSSI threshold is preferably a value that significantly degrades the reception environment in consideration of the meaning of the low power consumption mode. Whether or not the automatic mode is switched is detected every elapse of a predetermined period (step S720).

一方、上記ステップS701の判定において、モード選択部18による設定が自動モード切替でない場合は、ステップS702で手動モード切替を行う。そして、手動により感度優先モードと設定した場合はステップS705に移行し、中間モードと設定した場合はステップS710に移行し、低消費電力モードと設定した場合はステップS715に移行する。以降の処理は上記同様であるので省略する。   On the other hand, if it is determined in step S701 that the setting by the mode selection unit 18 is not automatic mode switching, manual mode switching is performed in step S702. When the sensitivity priority mode is set manually, the process proceeds to step S705. When the intermediate mode is set, the process proceeds to step S710. When the low power consumption mode is set, the process proceeds to step S715. Subsequent processing is the same as described above, and will be omitted.

このように本実施の形態のダイバーシチ装置17によれば、感度優先モードと低消費電力モードとその中間の3モードを有し、この3つのモードの切り替えは自動と手動のどちらにも対応するモード選択部18を有するので、合成ダイバーシチの効果と低消費電力を使用状態に応じて切り替えることが可能となる。   As described above, according to the diversity device 17 of the present embodiment, the sensitivity priority mode, the low power consumption mode, and the intermediate three modes are provided, and switching between the three modes is a mode corresponding to both automatic and manual modes. Since the selection unit 18 is provided, it is possible to switch the effect of the synthesis diversity and the low power consumption according to the use state.

(実施の形態4)
図9は、本発明の実施の形態4に係るダイバーシチ装置の概略構成を示すブロック図である。この図において、本実施の形態のダイバーシチ装置19は、電池の残量を検出する電池残量検出部20と、感度優先モード、低消費電力モード及び中間モードの各モードを実行する機能及び電池残量に応じてモード変更を行う機能を備えた制御部13Cとを備えており、これら以外は上述した実施の形態1〜3のダイバーシチ装置1、15、17と同一の構成を採る。当然ながら実施の形態1〜3のダイバーシチ装置1、15、17と共通する部分には同じ符号を付けてその説明を省略する。
(Embodiment 4)
FIG. 9 is a block diagram showing a schematic configuration of a diversity apparatus according to Embodiment 4 of the present invention. In this figure, the diversity device 19 of the present embodiment includes a battery remaining amount detection unit 20 that detects the remaining amount of the battery, a function that executes each of the sensitivity priority mode, the low power consumption mode, and the intermediate mode, and the remaining battery level. And a control unit 13C having a function of changing the mode according to the amount, and the other configuration is the same as that of the diversity apparatuses 1, 15, and 17 of the first to third embodiments. As a matter of course, the same reference numerals are given to portions common to the diversity devices 1, 15, and 17 of the first to third embodiments, and the description thereof is omitted.

電池残量検出部20は、本装置19が適用される携帯電話機等の移動局の電池残量を検出するものであり、電池残量を制御部13Cに通知する。制御部13Cは、電池残量が一定量以下になると、モード選択部18によるモード選択が如何なる場合においても強制的に低消費電力モードに切り替えて省電力化を図る。   The remaining battery level detection unit 20 detects the remaining battery level of a mobile station such as a mobile phone to which the present apparatus 19 is applied, and notifies the control unit 13C of the remaining battery level. When the remaining battery level falls below a certain level, the control unit 13C forcibly switches to the low power consumption mode regardless of the mode selection by the mode selection unit 18 to save power.

このように本実施の形態のダイバーシチ装置19によれば、電池残量を検出する電池残量検出部20を備え、電池残量が一定量以下となった場合にはモード選択が如何なる場合においても強制的に低消費電力モードに切り替えるので、電池残量が少なくなったときの通信可能時間の延長化が図れる。   As described above, according to the diversity device 19 of the present embodiment, the battery remaining amount detection unit 20 that detects the battery remaining amount is provided, and the mode selection can be performed in any case when the battery remaining amount is equal to or less than a predetermined amount. Since the mode is forcibly switched to the low power consumption mode, it is possible to extend the communicable time when the remaining battery level is low.

なお、上記各実施の形態では、アンテナを3本用いた場合であったが、3本以上であればその数に限定はなく、同様の作用効果が得られる。   In each of the above embodiments, three antennas are used. However, the number of antennas is not limited as long as the number is three or more, and similar effects can be obtained.

なお、上記各実施の形態では、受信電界強度検出部10にてRSSIを測定する形態を示したが、信号対雑音比SNR(Signal to Noise Ratio)や信号対干渉信号比SIR(Signal to Interference Ratio)などの指標を測定する形態やこれらの指標を組み合わせた形態でも構わない。   In each of the above-described embodiments, the RSSI is measured by the received electric field strength detector 10. However, the signal-to-noise ratio SNR (Signal to Noise Ratio) and the signal-to-interference signal ratio SIR (Signal to Interference Ratio) are described. ) Or the like, or a combination of these indicators.

本発明は、TDMA以外の通信方式や、HSDPA(High Speed Downlink Packet Access)のような通信状態の良化が特に望まれる通信方式を採用した移動体通信システムの携帯電話機等の移動局やこの移動局と無線通信を行う基地局に適用して好適である。   The present invention relates to a mobile station such as a mobile phone of a mobile communication system adopting a communication method other than TDMA or a communication method in which a communication state is particularly desired to be improved, such as HSDPA (High Speed Downlink Packet Access). It is suitable for application to a base station that performs radio communication with a station.

本発明の実施の形態1に係るダイバーシチ装置の概略構成を示すブロック図1 is a block diagram showing a schematic configuration of a diversity apparatus according to Embodiment 1 of the present invention. 実施の形態1に係るダイバーシチ装置の動作を説明するためのフロー図Flow chart for explaining the operation of the diversity apparatus according to the first embodiment. 本発明の実施の形態2に係るダイバーシチ装置の概略構成を示すブロック図The block diagram which shows schematic structure of the diversity apparatus which concerns on Embodiment 2 of this invention. 実施の形態2に係るダイバーシチ装置の動作を説明するためのフロー図Flow chart for explaining the operation of the diversity apparatus according to the second embodiment. 実施の形態2に係るダイバーシチ装置のフェージングと測定時間を説明するための図The figure for demonstrating the fading and measurement time of the diversity apparatus which concerns on Embodiment 2. FIG. 本発明の実施の形態3に係るダイバーシチ装置の概略構成を示すブロック図The block diagram which shows schematic structure of the diversity apparatus which concerns on Embodiment 3 of this invention. 実施の形態3に係るダイバーシチ装置の動作を説明するのためのフロー図Flow chart for explaining the operation of the diversity apparatus according to the third embodiment. 実施の形態3に係るダイバーシチ装置のアンテナ受信状態と合成利得を説明するための図The figure for demonstrating the antenna reception state and synthetic | combination gain of the diversity apparatus which concerns on Embodiment 3. FIG. 本発明の実施の形態4に係るダイバーシチ装置の概略構成を示すブロック図The block diagram which shows schematic structure of the diversity apparatus which concerns on Embodiment 4 of this invention.

符号の説明Explanation of symbols

1、15、17、19 ダイバーシチ装置
2〜4 アンテナ
5 アンテナスイッチ
6、7 受信部
8 合成部
9 合成ダイバーシチオン/オフスイッチ
10 受信電界強度検出部
11 記憶部
12 算出部
13、13A、13B、13C 制御部
14 受信部切替スイッチ
16 フェージングピッチ検出部
18 モード選択部
20 電池残量検出部
DESCRIPTION OF SYMBOLS 1, 15, 17, 19 Diversity apparatus 2-4 Antenna 5 Antenna switch 6, 7 Reception part 8 Synthesis | combination part 9 Synthesis | combination diversity on / off switch 10 Received electric field strength detection part 11 Storage part 12 Calculation part 13, 13A, 13B, 13C Control part 14 Reception part changeover switch 16 Fading pitch detection part 18 Mode selection part 20 Battery remaining charge detection part

Claims (7)

少なくとも3本のアンテナと、
全ての前記アンテナそれぞれを選択可能なアンテナ選択手段と、
前記アンテナ選択手段で選択された前記アンテナにて捉えられた無線信号を受信する2つの受信手段と、
2つの前記受信手段それぞれから出力される受信信号を同相合成する合成手段と、
受信信号を基に受信電界強度を検出する受信電界強度検出手段と、
前記受信電界強度検出手段にて検出された受信電界強度を記憶する記憶手段と、
前記アンテナが2本ずつ選択された場合、各2本ずつのアンテナの合成受信信号からそれぞれのアンテナにおける受信電界強度を算出する算出手段と、
ダイバーシチ制御用期間に前記アンテナ選択手段を制御して前記アンテナを2本ずつ順次選択して2つの前記受信手段で受信させ、それぞれから出力される受信信号を前記合成手段にて同相合成させて、前記受信電界強度検出手段にて検出された受信電界強度を前記記憶手段に記憶させた後、前記受信電界強度算出手段に対し、前記記憶手段に記憶された各2本ずつのアンテナの合成受信信号の受信電界強度からそれぞれのアンテナにおける受信電界強度を算出させ、算出されたそれぞれのアンテナの受信電界強度のうち、最も値の大きな受信電界強度のアンテナを選択し、合成ダイバーシチからアンテナ選択ダイバーシチに切り替える際に、選択した前記アンテナと接続状態にある前記受信手段を前記受信電界強度検出手段に接続する制御手段と、
を具備するダイバーシチ装置。
At least three antennas;
An antenna selecting means capable of selecting all the antennas;
Two receiving means for receiving a radio signal captured by the antenna selected by the antenna selecting means;
Synthesizing means for synthesizing received signals output from the two receiving means in phase;
A received electric field strength detecting means for detecting a received electric field strength based on the received signal;
Storage means for storing the received electric field strength detected by the received electric field strength detecting means;
When two antennas are selected, calculating means for calculating the received electric field strength at each antenna from the combined received signal of each two antennas;
In the diversity control period, the antenna selection unit is controlled to sequentially select the antennas two at a time and received by the two reception units, and the reception signals output from the antennas are combined in phase by the combination unit, After the received electric field strength detected by the received electric field strength detecting means is stored in the storage means, the combined received signal of each two antennas stored in the storage means to the received electric field strength calculation means The received electric field strength at each antenna is calculated from the received electric field strength of the selected antenna, and the antenna having the largest received electric field strength is selected from the calculated received electric field strengths of the respective antennas, and switching from combining diversity to antenna selection diversity is performed. Control of connecting the receiving means connected to the selected antenna to the received electric field strength detecting means. And the stage,
A diversity apparatus comprising:
1本の前記アンテナを使用して受信した無線信号を基にフェージングピッチを検出するフェージングピッチ検出手段を具備する請求項1に記載のダイバーシチ装置。   The diversity apparatus according to claim 1, further comprising fading pitch detection means for detecting a fading pitch based on a radio signal received using one antenna. 受信電界強度の値が最も良い2本の前記アンテナと2つの前記受信手段とを使用する合成ダイバーシチを行う感度優先モード、受信電界強度の値が最も良い1本の前記アンテナと1つの前記受信手段とを使用する中間モード及び予め設定された優先順位の高い前記アンテナと1つの前記受信手段とを使用する低消費電力モードの切り替えを手動で行うか自動で行うかを選択するモード選択手段を具備し、
前記制御手段は、前記感度優先モード、前記中間モード及び前記低消費電力モードを有し、前記モード選択手段におけるモードの切り替えが手動の場合は、手動選択されたモードを実行し、前記モード選択手段におけるモードの切り替えが自動の場合は、データ受信の有無と受信データ量に基づいてモード選択を行い実行する請求項1又は請求項2に記載のダイバーシチ装置。
Sensitivity priority mode for combining diversity using the two antennas having the best reception field strength and the two reception means, one antenna and one reception means having the best reception field strength Mode selection means for selecting whether to perform manual mode switching or automatic switching of the low power consumption mode using the preset high priority antenna and one receiving means. And
The control means has the sensitivity priority mode, the intermediate mode, and the low power consumption mode, and when the mode switching in the mode selection means is manual, executes the manually selected mode, and the mode selection means The diversity apparatus according to claim 1, wherein when the mode switching in is automatic, mode selection is performed based on the presence / absence of data reception and the amount of received data.
電池残量を検出する電池残量検出手段を備え、
前記制御手段は、前記モード選択手段におけるモード選択が如何なる場合であっても電池残量が一定量より少なくなったときには強制的に低消費電力モードに切り替える請求項3に記載のダイバーシチ装置。
A battery level detecting means for detecting the remaining battery level,
4. The diversity apparatus according to claim 3, wherein the control means forcibly switches to the low power consumption mode when the remaining battery level is less than a predetermined amount regardless of the mode selection by the mode selection means.
請求項1から請求項4のいずれかに記載のダイバーシチ装置を具備する移動局。   A mobile station comprising the diversity device according to any one of claims 1 to 4. 請求項1から請求項4のいずれかに記載のダイバーシチ装置を具備する基地局。   A base station comprising the diversity device according to any one of claims 1 to 4. ダイバーシチ制御用期間に少なくとも3本のアンテナから2本ずつ順番に選択し、選択した2本のアンテナを使用して2つの受信部で受信して得た受信信号を同相合成し、さらに合成受信信号の受信電界強度測定を行ってその結果を保存し、各2本ずつのアンテナの選択を全て行った後に、保存している各2本ずつのアンテナの合成測定結果からそれぞれのアンテナでの受信電界強度を算出し、合成ダイバーシチからアンテナ選択ダイバーシチに切り替える際には、算出したそれぞれアンテナでの受信電界強度のうち、最も値の大きい受信電界強度のアンテナを使用アンテナとして選択するとともに、2つの受信部のうち一方を前記使用アンテナに割り当てるダイバーシチ方法。   During the diversity control period, at least two antennas are selected in order from the three antennas, and the received signals obtained by the two receiving units using the two selected antennas are combined in phase, and further the combined received signal The received electric field strength measurement is performed and the result is stored, and after selecting all two antennas, the received electric field at each antenna is obtained from the stored combined antenna measurement results. When calculating the strength and switching from the combined diversity to the antenna selection diversity, the antenna having the largest received field strength among the calculated received field strengths at the respective antennas is selected as the used antenna and two receiving units Diversity method in which one of them is assigned to the antenna used.
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