JP2007311994A

JP2007311994A - Transmitting/receiving device and transmitting/receiving method

Info

Publication number: JP2007311994A
Application number: JP2006137756A
Authority: JP
Inventors: Tetsushi Nakayama; 哲史中山; Ritsu Miura; 律三浦
Original assignee: Matsushita Electric Industrial Co Ltd
Current assignee: Panasonic Holdings Corp
Priority date: 2006-05-17
Filing date: 2006-05-17
Publication date: 2007-11-29

Abstract

【課題】受信合成ダイバーシチを行っている状態で、受信信号に影響を与えることなく送信切り替えダバーシチを行うことができる送受信装置及び送受信方法を提供する。
【解決手段】従来用いられていた受信ダイバーシチ用のバンドパスフィルタ９をデュプレクサ１０に変更するとともに、送信信号増幅部５により増幅された無線信号をＳＰＤＴスイッチ１１にて２つのデュプレクサの４，１０いずれか一方に入力できる構成とする。これにより、受信信号経路を変えずに送信信号経路のみを変えることが可能となり、受信信号品質を劣化させることなく、送信切り替えダイバーシチを行うことができる。
【選択図】図１A transmission / reception apparatus and a transmission / reception method capable of performing transmission switching diversity without affecting a received signal in a state where reception combining diversity is performed.
A reception diversity band-pass filter 9 is changed to a duplexer 10 and a radio signal amplified by a transmission signal amplifying unit 5 is converted into either one of four duplexers 4 or 10 by an SPDT switch 11. It is set as the structure which can input into either. As a result, only the transmission signal path can be changed without changing the reception signal path, and transmission switching diversity can be performed without deteriorating the reception signal quality.
[Selection] Figure 1

Description

本発明は、ＷＣＤＭＡ（Wide Band CDMA）方式の携帯端末等の通信機器に用いて好適な送受信装置及び送受信方法に関する。 The present invention relates to a transmission / reception apparatus and a transmission / reception method suitable for use in a communication device such as a WCDMA (Wide Band CDMA) mobile terminal.

近年、上述した携帯端末においては、加入者数の増加や更なる周波数の有効利用のため、受信合成ダイバーシチを可能としたものの開発が進んでいる（例えば、特許文献１参照）。 In recent years, the above-described mobile terminals have been developed to enable reception combining diversity in order to increase the number of subscribers and to further effectively use frequencies (see, for example, Patent Document 1).

図３は、従来の携帯端末で使用されている送受信装置２００の概略構成を示すブロック図である。同図に示す従来の送受信装置２００は、送受信共用の２本のアンテナ１，２と、アンテナ経路切り替えスイッチ３と、デュプレクサ４と、送信信号増幅部５と、受信合成ダイバーシチ用受信部６と、送受信部７と、ベースバンド処理・制御部８と、受信ＲＦ信号用バンドパスフィルタ９とから構成される。 FIG. 3 is a block diagram showing a schematic configuration of a transmission / reception device 200 used in a conventional portable terminal. The conventional transmission / reception apparatus 200 shown in the figure includes two antennas 1 and 2 that are shared for transmission and reception, an antenna path switching switch 3, a duplexer 4, a transmission signal amplification unit 5, a reception combining diversity reception unit 6, The transmission / reception unit 7, a baseband processing / control unit 8, and a reception RF signal bandpass filter 9 are configured.

２本のアンテナ１，２は、ダイバーシチを行うためのアンテナである。なお、ダイバーシチを行わないときはいずれか一方が使用される。アンテナ経路切り替えスイッチ３は、２本のアンテナ１，２を受信合成ダイバーシチ用受信部６の経路と送受信部７の経路に対して任意に接続することを可能とする。デュプレクサ４は、送信波と受信波を分離するものであり、例えば送信波を通過させるＳＡＷ（Surface Acoustic Wave）フィルタと受信波を通過させるＳＡＷフィルタとから構成される。送信信号増幅部５は、送受信部７からの送信波を所定レベルまで増幅し出力する。受信合成ダイバーシチ用受信部６は、ダイバーシチ受信時にベースバンド処理・制御部８の制御によって動作し、アンテナ経路切り替えスイッチ３に接続されたアンテナ１あるいはアンテナ２を介して無線信号を受信する。 The two antennas 1 and 2 are antennas for performing diversity. In addition, when not performing diversity, either one is used. The antenna path changeover switch 3 can arbitrarily connect the two antennas 1 and 2 to the path of the receiving unit 6 for receiving and combining diversity and the path of the transmitting / receiving unit 7. The duplexer 4 separates a transmission wave and a reception wave, and includes, for example, a SAW (Surface Acoustic Wave) filter that allows the transmission wave to pass therethrough and a SAW filter that allows the reception wave to pass. The transmission signal amplification unit 5 amplifies the transmission wave from the transmission / reception unit 7 to a predetermined level and outputs it. The reception combining diversity receiving unit 6 operates under the control of the baseband processing / control unit 8 during diversity reception, and receives a radio signal via the antenna 1 or the antenna 2 connected to the antenna path switching switch 3.

送受信部７は、ベースバンド処理・制御部８から入力されたベースバンド信号を無線信号に変換して送信波を生成し送信出力端ＴＸから出力するとともに、アンテナ経路切り替えスイッチ３により接続されたアンテナ１あるいはアンテナ２を介して無線信号を受信する。ベースバンド処理・制御部８は、アンテナ経路切り替えスイッチ３、受信合成ダイバーシチ用受信部６及び送受信部７をそれぞれ制御するとともに、送信データからベースバンド信号を生成して送受信部７に入力し、更に受信合成ダイバーシチ用受信部６で受信された無線信号をベースバンド信号に変換し、また送受信部７で受信された無線信号をベースバンド信号に変換する。 The transmission / reception unit 7 converts the baseband signal input from the baseband processing / control unit 8 into a radio signal, generates a transmission wave, outputs the transmission wave from the transmission output terminal TX, and is connected to the antenna path switching switch 3 1 or a radio signal is received via the antenna 2. The baseband processing / control unit 8 controls the antenna path changeover switch 3, the reception combining diversity reception unit 6, and the transmission / reception unit 7, respectively, generates a baseband signal from the transmission data, and inputs the baseband signal to the transmission / reception unit 7. A radio signal received by the reception combining diversity receiving unit 6 is converted into a baseband signal, and a radio signal received by the transmission / reception unit 7 is converted into a baseband signal.

また、ベースバンド処理・制御部８は、受信合成ダイバーシチ用受信部６からの受信信号レベル及び送受信部７からの受信信号レベルに応じて適応的にアンテナ１，２の切り替えを行う。なお、１本のアンテナのみで受信するモードはシングルブランチ受信モードと呼ばれ、２本のアンテナの双方で受信するモードはダイバーシチ受信モードと呼ばれる。受信ＲＦ信号用バンドパスフィルタ９は、受信周波数を通過させる特性を有し、アンテナ１あるいはアンテナ２で捉えられた無線信号を通過させるとともに、送受信部７からの送信波の受信合成ダイバーシチ用受信部６への回り込みを防止する。 The baseband processing / control unit 8 adaptively switches the antennas 1 and 2 according to the reception signal level from the reception combining diversity reception unit 6 and the reception signal level from the transmission / reception unit 7. Note that a mode in which only one antenna is received is called a single branch reception mode, and a mode in which both antennas are received is called a diversity reception mode. The reception RF signal band-pass filter 9 has a characteristic of passing a reception frequency, passes a radio signal captured by the antenna 1 or the antenna 2, and receives a transmission wave from the transmission / reception unit 7. 6 is prevented.

次に、上記構成の送受信装置２００の動作を説明する。いま、シングルブランチ受信モード状態にあるとして、受信合成ダイバーシチを行う場合、ベースバンド処理・制御部８がアンテナ経路切り替えスイッチ３を制御して、現在使用していない方のアンテナ１もしくはアンテナ２を選択する。また同時に受信合成ダイバーシチ用受信部６を動作させて無線信号を受信させる。現在使用していない方のアンテナが選択され、また受信合成ダイバーシチ用受信部６が受信動作を開始すると、選択されたアンテナで受信された無線信号がバンドパスフィルタ９を通過して受信合成ダイバーシチ用受信部６に入力される。そして、受信合成ダイバーシチ用受信部６で復調された後、ベースバンド処理・制御部８で信号処理される。ベースバンド処理・制御部８には、既に使用中のアンテナを介して送受信部７によって受信された無線信号が入力されており、ベースバンド処理・制御部８は、その無線信号と、今現在使用を開始した（選択された）アンテナで受信合成ダイバーシチ用受信部６が受信した無線信号との合成を行う。 Next, the operation of the transmission / reception apparatus 200 configured as described above will be described. When receiving / combining diversity under the single branch reception mode, the baseband processing / control unit 8 controls the antenna path changeover switch 3 to select the antenna 1 or antenna 2 that is not currently used. To do. At the same time, the reception combining diversity receiving unit 6 is operated to receive a radio signal. When the antenna that is not currently used is selected and the reception unit 6 for receiving and combining diversity starts receiving operation, the radio signal received by the selected antenna passes through the bandpass filter 9 and is used for receiving and combining diversity. Input to the receiver 6. After being demodulated by the reception combining diversity receiving unit 6, the baseband processing / control unit 8 performs signal processing. The baseband processing / control unit 8 receives a radio signal received by the transmission / reception unit 7 via an antenna that is already in use, and the baseband processing / control unit 8 uses the radio signal and the presently used signal. Is combined with the radio signal received by the receiving unit 6 for receiving and combining diversity at the antenna selected (selected).

特開２００５−９４７１４号公報JP 2005-94714 A

しかしながら、従来の送受信装置においては、受信合成ダイバーシチを行いながら、受信合成ダイバーシチ用受信部６及び送受信部７の各受信信号レベルを検出して、受信アンテナ利得が大きい方のアンテナを送信アンテナとして使用する送信切り替えダイバーシチを行う場合、受信信号の経路も切り替わることになるので、その切り替えが行われる間すなわちアンテナ経路切り替えスイッチ３の接点が開放状態になる時間分だけ受信信号が途切れてしまい、位相が不連続となり受信感度が劣化するという問題がある。例えば、アンテナ１が受信合成ダイバーシチ用受信部６に接続されていて、アンテナ２が送受信部７に接続されている状態で、アンテナ１での受信信号レベルがアンテナ２での受信信号レベルを超えている場合、送信の際にアンテナ１を受信合成ダイバーシチ用受信部６側から送受信部７側に切り替えることになる。この切り替え時にアンテナ経路切り替えスイッチ３の接点が開放状態になり、その間受信信号が途切れることになる。 However, in the conventional transmission / reception apparatus, each reception signal level of the reception unit 6 for reception synthesis diversity and the transmission / reception unit 7 is detected while performing reception synthesis diversity, and the antenna having the larger reception antenna gain is used as the transmission antenna. When the transmission switching diversity is performed, the path of the reception signal is also switched. Therefore, during the switching, that is, the reception signal is interrupted for the time when the contact of the antenna path switching switch 3 is opened, and the phase is changed. There is a problem that reception sensitivity deteriorates due to discontinuity. For example, when the antenna 1 is connected to the reception combining diversity receiving unit 6 and the antenna 2 is connected to the transmitting / receiving unit 7, the received signal level at the antenna 1 exceeds the received signal level at the antenna 2. When transmitting, the antenna 1 is switched from the receiving unit 6 for receiving and combining diversity to the transmitting / receiving unit 7 side. At the time of this switching, the contact of the antenna path switching switch 3 is opened, and the reception signal is interrupted during that time.

本発明は、係る事情に鑑みてなされたものであり、受信合成ダイバーシチを行っている状態で、受信信号に影響を与えることなく、送信切り替えダイバーシチを行うことができる送受信装置及び送受信方法を提供することを目的とする。 The present invention has been made in view of such circumstances, and provides a transmission / reception apparatus and a transmission / reception method capable of performing transmission switching diversity without affecting a received signal in a state in which reception combining diversity is performed. For the purpose.

上記目的は下記構成又は方法により達成される。
（１）送受信装置において、送受信共用の複数のアンテナと、前記複数のアンテナを単一選択又は複数選択するアンテナ選択手段と、送信周波数の無線信号と受信周波数の無線信号をそれぞれ通過させる２つのデュプレクサと、前記２つのデュプレクサのうち一方を通過した受信周波数の無線信号を受信する第１の受信手段と、前記２つのデュプレクサのうち他方を通過した受信周波数の無線信号を受信する第２の受信手段と、送信周波数の無線信号を前記一方のデュプレクサ側又は前記他方のデュプレクサ側に振り分けるスイッチ手段と、ダイバーシチ受信モード時に、前記アンテナ選択手段を制御して前記複数のアンテナのうち一方を前記第１の受信手段側に切り替え、他方を前記第２の受信手段側に切り替え、ダイバーシチ受信モード状態で送信を行う場合は、前記第１の受信手段と前記第２の受信手段のうち、受信信号レベルの大きい方で使用されている前記アンテナに送信周波数の無線信号を供給するように前記スイッチ手段を制御する制御手段と、を備える。 The object is achieved by the following configuration or method.
(1) In a transmission / reception apparatus, a plurality of antennas shared for transmission and reception, an antenna selection means for selecting or selecting a plurality of the plurality of antennas, and two duplexers for passing a radio signal of a transmission frequency and a radio signal of a reception frequency, respectively. First receiving means for receiving a radio signal having a reception frequency that has passed through one of the two duplexers, and second receiving means for receiving a radio signal having a reception frequency that has passed through the other of the two duplexers. And switch means for distributing the radio signal of the transmission frequency to the one duplexer side or the other duplexer side, and in the diversity reception mode, the antenna selection means is controlled to control one of the plurality of antennas as the first antenna. Switching to the receiving means side, switching the other to the second receiving means side, diversity reception mode When transmitting in a state, the switch is adapted to supply a radio signal having a transmission frequency to the antenna used in the higher reception signal level of the first reception unit and the second reception unit. Control means for controlling the means.

（２）送受信装置において、送受信共用の複数のアンテナと、前記複数のアンテナを単一選択又は複数選択するアンテナ選択手段と、受信周波数の無線信号のみを通過させる第１及び第２のフィルタと、送信周波数の無線信号のみを通過させる第３のフィルタと、前記第１のフィルタを通過した受信周波数の無線信号を受信する第１の受信手段と、前記第２のフィルタを通過した受信周波数の無線信号を受信する第２の受信手段と、前記アンテナ選択手段を介して送信周波数の無線信号を前記複数のアンテナのうち一方に振り分けるスイッチ手段と、ダイバーシチ受信モード時に、前記アンテナ選択手段を制御して前記複数のアンテナのうち一方を前記第１の受信手段側に切り替え、他方を前記第２の受信手段側に切り替え、ダイバーシチ受信モード状態で送信を行う場合は、前記第１の受信手段と前記第２の受信手段のうち、受信信号レベルの大きい方で使用されている前記アンテナに送信周波数の無線信号を供給するように前記スイッチ手段を制御する制御手段と、を備える。 (2) In the transmission / reception apparatus, a plurality of antennas shared for transmission / reception, antenna selection means for single selection or a plurality of selections of the plurality of antennas, first and second filters that allow only reception frequency radio signals to pass through, A third filter that passes only a radio signal having a transmission frequency; a first receiving unit that receives a radio signal having a reception frequency that has passed through the first filter; and a radio having a reception frequency that has passed through the second filter. Second receiving means for receiving a signal, switch means for distributing a radio signal of a transmission frequency to one of the plurality of antennas via the antenna selecting means, and controlling the antenna selecting means in a diversity reception mode. One of the plurality of antennas is switched to the first receiving means side, and the other is switched to the second receiving means side. When transmission is performed in the reception mode state, a radio signal having a transmission frequency is supplied to the antenna used at the higher reception signal level of the first reception unit and the second reception unit. Control means for controlling the switch means.

（３）上記（２）に記載の送受信装置において、前記スイッチ手段と前記第１のフィルタとの間、前記スイッチ手段と前記第２のフィルタとの間及び前記スイッチ手段と前記第３のフィルタとの間夫々に介挿され、位相整合をとるための３つの整合手段を備える。 (3) In the transmission / reception device according to (2), between the switch unit and the first filter, between the switch unit and the second filter, and between the switch unit and the third filter, Are provided with three matching means for phase matching.

（４）通信機器において、上記（１）乃至（３）のいずれかに記載の送受信装置を備える。 (4) A communication device includes the transmission / reception device according to any one of (1) to (3).

（５）送受信方法において、送受信共用の複数のアンテナを単一選択又は複数選択可能とし、送信周波数の無線信号と受信周波数の無線信号をそれぞれ通過させる２つのデュプレクサのうち一方を通過した受信周波数の無線信号を第１の受信手段で受信し、前記２つのデュプレクサのうち他方を通過した受信周波数の無線信号を第２の受信手段で受信し、ダイバーシチ受信モード時には、前記複数のアンテナのうち一方を前記第１の受信手段側に切り替え、他方を前記第２の受信手段側に切り替え、ダイバーシチ受信モード状態で送信を行う場合は、前記第１の受信手段と前記第２の受信手段のうち、受信信号レベルの大きい方で使用されている前記アンテナに送信周波数の無線信号を供給する。 (5) In the transmission / reception method, a plurality of antennas shared for transmission / reception can be selected or selected, and a reception frequency that has passed through one of two duplexers that allows a radio signal of a transmission frequency and a radio signal of a reception frequency to pass through each of them. A radio signal is received by the first receiving means, a radio signal having a reception frequency that has passed through the other of the two duplexers is received by the second receiving means, and in the diversity reception mode, one of the plurality of antennas is received. When switching to the first receiving means side, switching the other to the second receiving means side, and performing transmission in the diversity reception mode state, the first receiving means and the second receiving means receive A radio signal having a transmission frequency is supplied to the antenna used at the higher signal level.

（６）送受信方法において、送受信共用の複数のアンテナを単一選択又は複数選択可能とし、受信周波数の無線信号のみを通過させる第１のフィルタからの無線信号を第１の受信手段で受信するとともに、受信周波数の無線信号のみを通過させる第２のフィルタからの無線信号を第２の受信手段で受信し、ダイバーシチ受信モード時には、前記複数のアンテナのうち一方を前記第１の受信手段側に切り替え、他方を前記第２の受信手段側に切り替え、ダイバーシチ受信モード状態で送信を行う場合は、前記第１の受信手段と前記第２の受信手段のうち、受信信号レベルの大きい方で使用されている前記アンテナに送信周波数の無線信号のみを通過させる第３のフィルタを介して送信周波数の無線信号を供給する。 (6) In the transmission / reception method, a plurality of antennas shared for transmission / reception can be single-selected or selected, and a first reception unit receives a radio signal from a first filter that passes only a radio signal of a reception frequency. The radio signal from the second filter that passes only the radio signal of the reception frequency is received by the second receiving means, and in the diversity reception mode, one of the plurality of antennas is switched to the first receiving means side. When the other is switched to the second receiving means side and transmission is performed in the diversity reception mode, it is used on the higher receiving signal level of the first receiving means and the second receiving means. A radio signal having a transmission frequency is supplied through a third filter that allows only the radio signal having a transmission frequency to pass through the antenna.

上記（１）に記載の送受信装置では、従来用いられていた受信ダイバーシチ用のバンドパスフィルタをデュプレクサに変更するとともに、無線信号をスイッチ手段にて２つのデュプレクサのいずれか一方に入力できるようにしたので、受信信号の経路を切り替えずに送信信号の経路を切り替えることができる。したがって、受信合成ダイバーシチを行っている状態で、受信信号に影響を与えることなく送信切り替えダイバーシチを行うことが可能となる。 In the transmission / reception apparatus described in (1) above, the bandpass filter for reception diversity that has been used conventionally is changed to a duplexer, and a radio signal can be input to one of the two duplexers by the switch means. Therefore, the transmission signal path can be switched without switching the reception signal path. Therefore, it is possible to perform transmission switching diversity without affecting the received signal in a state where reception combining diversity is performed.

上記（２）に記載の送受信装置では、２つの受信系に受信周波数の無線信号のみを通過させる第１及び第２のフィルタを備えるとともに、送信系に送信周波数の無線信号のみを通過させる第３のフィルタを備え、無線信号をスイッチ手段にて複数のアンテナのいずれか一方に入力できるようにしたので、受信信号の経路を切り替えずに送信信号の経路を切り替えることができる。したがって、受信合成ダイバーシチを行っている状態で、受信信号に影響を与えることなく送信切り替えダイバーシチを行うことが可能となる。 In the transmission / reception device described in (2) above, the second reception system includes first and second filters that allow only the reception frequency radio signal to pass, and the transmission system only allows the transmission frequency radio signal to pass. Since the wireless signal can be input to any one of the plurality of antennas by the switch means, the path of the transmission signal can be switched without switching the path of the reception signal. Therefore, it is possible to perform transmission switching diversity without affecting the received signal in a state where reception combining diversity is performed.

上記（３）に記載の送受信装置では、スイッチ手段と各フィルタとの間の位相整合を取ることができる。 In the transmission / reception device described in (3) above, phase matching can be achieved between the switch means and each filter.

上記（４）に記載の通信機器では、受信合成ダイバーシチを行っている状態で、受信信号に影響を与えることなく送信切り替えダイバーシチを行うことが可能となる。 In the communication device described in (4) above, it is possible to perform transmission switching diversity without affecting the received signal in a state where reception combining diversity is performed.

上記（５）に記載の送受信方法では、受信信号の経路を切り替えずに送信信号の経路を切り替えることができるので、受信合成ダイバーシチを行っている状態で、受信信号に影響を与えることなく送信切り替えダイバーシチを行うことが可能となる。 In the transmission / reception method described in (5) above, since the transmission signal path can be switched without switching the reception signal path, transmission switching is performed without affecting the reception signal in a state where reception synthesis diversity is performed. Diversity can be performed.

上記（６）に記載の送受信方法では、受信信号の経路を切り替えずに送信信号の経路を切り替えることができるので、受信合成ダイバーシチを行っている状態で、受信信号に影響を与えることなく送信切り替えダイバーシチを行うことが可能となる。 In the transmission / reception method described in (6) above, since the transmission signal path can be switched without switching the reception signal path, transmission switching is performed without affecting the reception signal in a state where reception synthesis diversity is performed. Diversity can be performed.

以下、本発明を実施するための好適な実施の形態について、図面を参照して詳細に説明する。 DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments for carrying out the 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に係る送受信装置の概略構成を示すブロック図である。なお、同図において、前述した図３と同一要素には同一の符号を付し、重複する説明を省略する。本実施の形態の送受信装置１００は、送受信共用の２本のアンテナ１，２と、アンテナ選択と送受信信号経路選択のためのアンテナ経路切り替えスイッチ３と、デュプレクサ４及び１０と、送信信号増幅部５と、受信合成ダイバーシチ用受信部６と、変復調を行う送受信部７と、ベースバンド処理・制御部８と、送信信号を切り替えるためのＳＰＤＴ（Single Pole Double Throw）スイッチ１１とを備えて構成される。なお、送受信部７は、送信用と受信用に分かれていても良い。デュプレクサ１０は、デュプレクサ４と同様に、送信波と受信波を分離するものであり、例えば送信波を通過させるＳＡＷフィルタと受信波を通過させるＳＡＷフィルタとから構成される。 (Embodiment 1)
FIG. 1 is a block diagram showing a schematic configuration of a transmission / reception apparatus according to Embodiment 1 of the present invention. In the figure, the same elements as those in FIG. 3 described above are denoted by the same reference numerals, and redundant description is omitted. The transmission / reception apparatus 100 according to the present embodiment includes two antennas 1 and 2 shared for transmission and reception, an antenna path changeover switch 3 for antenna selection and transmission / reception signal path selection, duplexers 4 and 10, and a transmission signal amplification unit 5. And a receiving / combining diversity receiving unit 6, a transmitting / receiving unit 7 that performs modulation / demodulation, a baseband processing / control unit 8, and an SPDT (Single Pole Double Throw) switch 11 for switching transmission signals. . The transmission / reception unit 7 may be divided for transmission and reception. Similar to the duplexer 4, the duplexer 10 separates a transmission wave and a reception wave, and includes, for example, a SAW filter that allows the transmission wave to pass and a SAW filter that allows the reception wave to pass.

なお、アンテナ経路切り替えスイッチ３はアンテナ選択手段に対応し、送受信部７は第１の受信手段に対応し、受信合成ダイバーシチ用受信部６は第２の受信手段に対応し、ＳＰＤＴスイッチ１１はスイッチ手段に対応し、ベースバンド処理・制御部８は制御手段に対応する。 The antenna path changeover switch 3 corresponds to an antenna selection means, the transmission / reception unit 7 corresponds to a first reception means, the reception combining diversity reception unit 6 corresponds to a second reception means, and the SPDT switch 11 is a switch. Corresponding to the means, the baseband processing / control unit 8 corresponds to the control means.

次に、上記構成の送受信装置１００の動作を説明する。 Next, the operation of the transmission / reception apparatus 100 configured as described above will be described.

（受信合成ダイバーシチを行わない場合）
ベースバンド処理・制御部８は、受信合成ダイバーシチ用受信部６の動作を停止させて送受信部７のみを動作させる。更にＳＰＤＴスイッチ１１を制御して送信信号増幅部５の出力をデュプレクサ４側に切り替える。この処理を行った後、送信データから生成したベースバンド信号を送受信部７に入力する。これにより、送受信部７にてベースバンド信号が変調されて無線信号（送信信号）が生成され、送信信号出力端ＴＸから送信信号増幅部５に入力される。送信信号増幅部５で所定レベルまでの増幅された後、ＳＰＤＴスイッチ１１を経由してデュプレクサ４に入力される。そして、デュプレクサ４からアンテナ経路切り替えスイッチ３を経由してアンテナ１もしくはアンテナ２に入力されて送信される。一方、アンテナ１もしくはアンテナ２で捉えられた無線信号（受信信号）がアンテナ経路切り替えスイッチ３を経由してデュプレクサ４に入力される。そして、デュプレクサ４から送受信部７の受信信号入力端ＲＸ１に入力されて復調された後、ベースバンド処理・制御部８に入力されて信号処理される。以上の送受信動作は１つのアンテナを共用する。 (When reception synthesis diversity is not performed)
The baseband processing / control unit 8 stops the operation of the reception combining diversity reception unit 6 and operates only the transmission / reception unit 7. Further, the SPDT switch 11 is controlled to switch the output of the transmission signal amplifier 5 to the duplexer 4 side. After performing this processing, the baseband signal generated from the transmission data is input to the transmission / reception unit 7. As a result, the baseband signal is modulated by the transmission / reception unit 7 to generate a radio signal (transmission signal), which is input from the transmission signal output terminal TX to the transmission signal amplification unit 5. After being amplified to a predetermined level by the transmission signal amplifying unit 5, the signal is input to the duplexer 4 via the SPDT switch 11. Then, the signal is input from the duplexer 4 to the antenna 1 or the antenna 2 via the antenna path changeover switch 3 and transmitted. On the other hand, a radio signal (received signal) captured by the antenna 1 or the antenna 2 is input to the duplexer 4 via the antenna path changeover switch 3. Then, the signal is input from the duplexer 4 to the reception signal input terminal RX1 of the transmission / reception unit 7 and demodulated, and then input to the baseband processing / control unit 8 for signal processing. The above transmission / reception operations share one antenna.

（受信合成ダイバーシチを行う場合）
ベースバンド処理・制御部８は、２つの受信信号経路の残り１つを使用するため、受信合成ダイバーシチ用受信部６を動作させる。また、上記記載において使用していない方のアンテナ１もしくはアンテナ２を使用するためにアンテナ経路切り替えスイッチ３を制御して、該アンテナを受信合成ダイバーシチ用受信部６側に接続して受信信号を受ける。上記記載において使用していない方のアンテナ１もしくはアンテナ２で捉えられた無線信号はデュプレクサ１０を経由して受信合成ダイバーシチ用受信部６に入力されて復調された後、ベースバンド処理・制御部８に入力されて信号処理される。 (When performing receive synthesis diversity)
Since the baseband processing / control unit 8 uses the remaining one of the two reception signal paths, the reception combining diversity reception unit 6 is operated. Further, in order to use the antenna 1 or antenna 2 that is not used in the above description, the antenna path changeover switch 3 is controlled, and the antenna is connected to the receiving unit 6 for receiving and combining diversity to receive the received signal. . The radio signal captured by the antenna 1 or the antenna 2 that is not used in the above description is input to the receiving unit 6 for receiving and combining diversity via the duplexer 10 and demodulated, and then the baseband processing / control unit 8. To be subjected to signal processing.

（送信切り替えダイバーシチを行う場合）
受信合成ダイバーシチを行いながら、送信切り替えダイバーシチを行う場合、ベースバンド処理・制御部８は、受信合成ダイバーシチ用受信部６で受けた受信信号と送受信部７で受けた受信信号のうち、信号レベルの大きい方が使用しているアンテナを選択するように、ＳＰＤＴスイッチ１１を切り替えて送信切り替えダイバーシチを行う。例えば、受信合成ダイバーシチ用受信部６がアンテナ１を使用し、送受信部７がアンテナ２を使用して受信合成ダイバーシチを行っている状態で、アンテナ１の方の信号レベルが高ければ、ＳＰＤＴスイッチ１１がデュプレクサ１０側に切り替わり、アンテナ２の方の信号レベルが高ければ、ＳＰＤＴスイッチ１１がデュプレクサ４側に切り替わる。この間、アンテナ経路切り替えスイッチ３の接点がオープンになることがない。すなわち、受信信号が途切れることがない。 (When performing transmission switching diversity)
When performing transmission switching diversity while performing reception combining diversity, the baseband processing / control unit 8 has a signal level of the reception signal received by the reception combining diversity receiving unit 6 and the reception signal received by the transmission / reception unit 7. Transmission switching diversity is performed by switching the SPDT switch 11 so that the larger antenna is selected. For example, when the reception unit 6 for reception combining diversity uses the antenna 1 and the transmission / reception unit 7 performs reception combining diversity using the antenna 2, if the signal level of the antenna 1 is higher, the SPDT switch 11 Is switched to the duplexer 10 side, and if the signal level of the antenna 2 is higher, the SPDT switch 11 is switched to the duplexer 4 side. During this time, the contact of the antenna path changeover switch 3 is not opened. That is, the received signal is not interrupted.

このように本実施の形態の送受信装置１００によれば、従来用いられていた受信ダイバーシチ用のバンドパスフィルタ９をデュプレクサ１０に変更するとともに、送信信号増幅部５により増幅された無線信号をＳＰＤＴスイッチ１１にて２つのデュプレクサの４，１０いずれか一方に入力できるようにしたので、受信信号の経路を切り替えずに送信信号の経路を切り替えることができる。したがって、受信合成ダイバーシチを行っている状態で、受信信号に影響を与えることなく送信切り替えダイバーシチを行うことが可能となる。 As described above, according to the transmitting / receiving apparatus 100 of the present embodiment, the bandpass filter 9 for reception diversity that has been conventionally used is changed to the duplexer 10 and the radio signal amplified by the transmission signal amplifying unit 5 is switched to the SPDT switch. 11, the transmission signal path can be switched without switching the path of the reception signal. Therefore, it is possible to perform transmission switching diversity without affecting the received signal in a state where reception combining diversity is performed.

なお、上記実施の形態では、２本のアンテナを備えた場合であったが、３本以上であっても同様の作用・効果を得ることができる。 In the above embodiment, two antennas are provided. However, the same actions and effects can be obtained even with three or more antennas.

（実施の形態２）
図２は、本発明の実施の形態２に係る送受信装置１１０の概略構成を示すブロック図である。なお、同図において前述した図１と同一要素には同一の符号を付し、重複する説明を省略する。図１に示す送受信装置１００と異なる点は、デュプレクサ４を、受信周波数成分を通し送信周波数成分を通さない特性のフィルタ１４に変更するとともに、デュプレクサ１０を、受信周波数成分を通し送信周波数成分を通さない特性のフィルタ１５に変更し、またＳＰＤＴスイッチ１１と送信信号増幅部５との間に送信周波数成分を通し受信周波数成分を通さない特性のフィルタ１６を挿入するとともに、フィルタ１４〜１６とアンテナ経路切り替えスイッチ３との間にアンテナ経路切り替えスイッチ３とフィルタ１４〜１６との位相整合を取るための整合回路１７〜１９を挿入し、更にＳＰＤＴスイッチ１１の２つの出力端をフィルタ１４，１５に接続せず直接アンテナ経路切り替えスイッチ３に接続するようにした点にある。 (Embodiment 2)
FIG. 2 is a block diagram showing a schematic configuration of transmission / reception apparatus 110 according to Embodiment 2 of the present invention. In the figure, the same elements as those in FIG. 1 described above are denoted by the same reference numerals, and redundant description is omitted. 1 is different from the transmission / reception apparatus 100 shown in FIG. 1 in that the duplexer 4 is changed to a filter 14 having a characteristic that passes the reception frequency component and does not pass the transmission frequency component, and the duplexer 10 passes the reception frequency component and passes the transmission frequency component. In addition, a filter 16 having a characteristic that allows transmission frequency components to pass and does not pass reception frequency components is inserted between the SPDT switch 11 and the transmission signal amplification unit 5, and the filters 14 to 16 and the antenna path Matching circuits 17 to 19 for phase matching between the antenna path switching switch 3 and the filters 14 to 16 are inserted between the switch 3 and the two output terminals of the SPDT switch 11 are connected to the filters 14 and 15. Instead, the antenna path changeover switch 3 is connected directly.

なお、アンテナ経路切り替えスイッチ３はアンテナ選択手段に対応し、送受信部７は第１の受信手段に対応し、受信合成ダイバーシチ用受信部６は第２の受信手段に対応し、ＳＰＤＴスイッチ１１はスイッチ手段に対応し、ベースバンド処理・制御部８は制御手段に対応し、フィルタ１４は第１のフィルタに対応し、フィルタ１５は第２のフィルタに対応し、フィルタ１６は第３のフィルタに対応し、整合回路１７〜１９はそれぞれ整合手段に対応する。 The antenna path changeover switch 3 corresponds to an antenna selection means, the transmission / reception unit 7 corresponds to a first reception means, the reception combining diversity reception unit 6 corresponds to a second reception means, and the SPDT switch 11 is a switch. The baseband processing / control unit 8 corresponds to the control means, the filter 14 corresponds to the first filter, the filter 15 corresponds to the second filter, and the filter 16 corresponds to the third filter. The matching circuits 17 to 19 correspond to matching means, respectively.

次に、上記構成の送受信装置１１０の動作を説明する。 Next, the operation of the transmission / reception device 110 configured as described above will be described.

（受信合成ダイバーシチを行わない場合）
ベースバンド処理・制御部８は、受信合成ダイバーシチ用受信部６の動作を停止させて送受信部７のみを動作させる。更にＳＰＤＴスイッチ１１を制御して送信信号増幅部５の出力を整合回路１８側に切り替える。この処理を行った後、送信データから生成したベースバンド信号を送受信部７に入力する。これにより、送受信部７にてベースバンド信号が変調されて無線信号（送信信号）が生成され、送信信号出力端ＴＸから送信信号増幅部５に入力される。送信信号増幅部５で所定レベルまでの増幅された後、フィルタ１６、整合回路１９、ＳＰＤＴスイッチ１１を経由してアンテナ１もしくはアンテナ２に入力されて送信される。 (When reception synthesis diversity is not performed)
The baseband processing / control unit 8 stops the operation of the reception combining diversity reception unit 6 and operates only the transmission / reception unit 7. Further, the SPDT switch 11 is controlled to switch the output of the transmission signal amplifier 5 to the matching circuit 18 side. After performing this processing, the baseband signal generated from the transmission data is input to the transmission / reception unit 7. As a result, the baseband signal is modulated by the transmission / reception unit 7 to generate a radio signal (transmission signal), which is input from the transmission signal output terminal TX to the transmission signal amplification unit 5. After being amplified to a predetermined level by the transmission signal amplifier 5, the signal is input to the antenna 1 or the antenna 2 via the filter 16, the matching circuit 19, and the SPDT switch 11 and transmitted.

一方、アンテナ１もしくはアンテナ２で捉えられた無線信号（受信信号）がアンテナ経路切り替えスイッチ３、整合回路１８、フィルタ１４を経由して送受信部７の受信信号入力端ＲＸ１に入力される。送受信部７で復調された後、ベースバンド処理・制御部８に入力されて信号処理される。以上の送受信動作は１つのアンテナを共用する。このときフィルタ１６及び整合回路１９を通過した送信信号は整合回路１８にも入力されるが、フィルタ１４の特性により送受信部７の受信信号入力端ＲＸ１側に漏洩することはない。また、受信信号もＳＰＤＴスイッチ１１、整合回路１９を通過してフィルタ１６に入力されるが、フィルタ１６の特性により送受信部７の送信信号出力端ＴＸ１側に漏洩することはない。 On the other hand, a radio signal (reception signal) captured by the antenna 1 or the antenna 2 is input to the reception signal input terminal RX1 of the transmission / reception unit 7 via the antenna path changeover switch 3, the matching circuit 18, and the filter 14. After being demodulated by the transmission / reception unit 7, the signal is input to the baseband processing / control unit 8 for signal processing. The above transmission / reception operations share one antenna. At this time, the transmission signal that has passed through the filter 16 and the matching circuit 19 is also input to the matching circuit 18, but does not leak to the reception signal input end RX 1 side of the transmission / reception unit 7 due to the characteristics of the filter 14. Also, the received signal passes through the SPDT switch 11 and the matching circuit 19 and is input to the filter 16, but does not leak to the transmission signal output end TX 1 side of the transmission / reception unit 7 due to the characteristics of the filter 16.

（受信合成ダイバーシチを行う場合）
ベースバンド処理・制御部８は、２つの受信信号経路の残り１つを使用するため、受信合成ダイバーシチ用受信部６を動作させる。また、上記記載において使用していない方のアンテナ１もしくはアンテナ２を使用するため、アンテナ経路切り替えスイッチ３を制御して、該アンテナを受信合成ダイバーシチ用受信部６側に接続して受信信号を受ける。上記記載において使用していない方のアンテナ１もしくはアンテナ２で捉えられた無線信号は、整合回路１７、フィルタ１５を経由して受信合成ダイバーシチ用受信部６に入力されて復調された後、ベースバンド処理・制御部８に入力されて信号処理される。 (When performing receive synthesis diversity)
Since the baseband processing / control unit 8 uses the remaining one of the two reception signal paths, the reception combining diversity reception unit 6 is operated. In addition, since the antenna 1 or antenna 2 which is not used in the above description is used, the antenna path changeover switch 3 is controlled and the antenna is connected to the reception unit 6 for receiving and combining diversity to receive the received signal. . The radio signal captured by the antenna 1 or the antenna 2 which is not used in the above description is input to the reception combining diversity receiving unit 6 via the matching circuit 17 and the filter 15 and demodulated, and then the baseband. The signal is input to the processing / control unit 8 and processed.

（送信切り替えダイバーシチを行う場合）
受信合成ダイバーシチを行いながら、送信切り替えダイバーシチを行う場合、ベースバンド処理・制御部８は、受信合成ダイバーシチ用受信部６で受けた受信信号と送受信部７で受けた受信信号のうち、信号レベルの大きい方が使用しているアンテナを選択するように、ＳＰＤＴスイッチ１１を切り替えて送信切り替えダイバーシチを行う。例えば、受信合成ダイバーシチ用受信部６がアンテナ１を使用し、送受信部７がアンテナ２を使用して受信合成ダイバーシチを行っている状態で、アンテナ１の方の信号レベルが高ければ、ＳＰＤＴスイッチ１１が整合回路１７側に切り替わり、アンテナ２の方の信号レベルが高ければ、ＳＰＤＴスイッチ１１が整合回路１８側に切り替わる。この間、アンテナ経路切り替えスイッチ３の接点がオープンになることがない。すなわち、受信信号が途切れることがない。 (When performing transmission switching diversity)
When performing transmission switching diversity while performing reception combining diversity, the baseband processing / control unit 8 has a signal level of the reception signal received by the reception combining diversity receiving unit 6 and the reception signal received by the transmission / reception unit 7. Transmission switching diversity is performed by switching the SPDT switch 11 so that the larger antenna is selected. For example, when the reception unit 6 for reception combining diversity uses the antenna 1 and the transmission / reception unit 7 performs reception combining diversity using the antenna 2, if the signal level of the antenna 1 is higher, the SPDT switch 11 Is switched to the matching circuit 17 side, and if the signal level of the antenna 2 is higher, the SPDT switch 11 is switched to the matching circuit 18 side. During this time, the contact of the antenna path changeover switch 3 is not opened. That is, the received signal is not interrupted.

このように本実施の形態の送受信装置１１０によれば、２つの受信系それぞれに受信周波数の無線信号のみを通過させるフィルタ１４，１５を備え、送信系に送信周波数の無線信号のみを通過させるフィルタ１６を備え、送信信号増幅部５により増幅された無線信号をＳＰＤＴスイッチ１１にて２つのアンテナ１，２いずれか一方に入力できるようにしたので、受信信号の経路を切り替えずに送信信号の経路を切り替えることができる。したがって、受信合成ダイバーシチを行っている状態で、受信信号に影響を与えることなく送信切り替えダイバーシチを行うことが可能となる。 As described above, according to the transmission / reception device 110 of the present embodiment, each of the two reception systems includes the filters 14 and 15 that pass only the radio signal of the reception frequency, and the filter that passes only the radio signal of the transmission frequency to the transmission system. 16 and the radio signal amplified by the transmission signal amplification unit 5 can be input to either one of the two antennas 1 and 2 by the SPDT switch 11, so that the path of the transmission signal can be switched without switching the path of the reception signal. Can be switched. Therefore, it is possible to perform transmission switching diversity without affecting the received signal in a state where reception combining diversity is performed.

また、実施の形態１に係る送受信装置１００の構成と比較して、整合回路１７，１８を追加するものの、デュプレクサ４，１０をフィルタ１４，１５，１６に変更するだけであるので、回路規模の縮小化が図れるとともにコストの削減が可能となる。また、アンテナ経路切り替えスイッチ３とＳＰＤＴスイッチ１１を統合させることが可能であり、回路規模を更に縮小することができる。 Compared with the configuration of the transmission / reception device 100 according to the first embodiment, although the matching circuits 17 and 18 are added, only the duplexers 4 and 10 are changed to the filters 14, 15, and 16. The size can be reduced and the cost can be reduced. Further, the antenna path changeover switch 3 and the SPDT switch 11 can be integrated, and the circuit scale can be further reduced.

本発明は、受信合成ダイバーシチを行っている状態で、受信信号に影響を与えることなく送信切り替えダイバーシチを行うことができるといった効果を有し、ダイバーシチ機能を持つ携帯端末等の通信機器への適用が可能である。 INDUSTRIAL APPLICABILITY The present invention has an effect that transmission switching diversity can be performed without affecting a received signal in a state where reception combining diversity is performed, and can be applied to a communication device such as a portable terminal having a diversity function. Is possible.

本発明の実施の形態１に係る送受信装置の概略構成を示すブロック図The block diagram which shows schematic structure of the transmission / reception apparatus which concerns on Embodiment 1 of this invention. 本発明の実施の形態２に係る送受信装置の概略構成を示すブロック図The block diagram which shows schematic structure of the transmission / reception apparatus which concerns on Embodiment 2 of this invention. 従来の送受信装置の概略構成を示すブロック図The block diagram which shows schematic structure of the conventional transmission / reception apparatus

Explanation of symbols

１、２アンテナ
３アンテナ経路切り替えスイッチ
４、１０デュプレクサ
５送信信号増幅部
６受信合成ダイバーシチ用受信部
７送受信部
８ベースバンド処理・制御部
１１ＳＰＤＴスイッチ
１４、１５、１６フィルタ
１７、１８、１９整合回路
１００、１１０送受信装置 DESCRIPTION OF SYMBOLS 1, 2 Antenna 3 Antenna path changeover switch 4, 10 Duplexer 5 Transmission signal amplification part 6 Reception part for reception synthetic | combination diversity 7 Transmission / reception part 8 Baseband processing and control part 11 SPDT switch 14, 15, 16 Filter 17, 18, 19 Matching Circuit 100, 110 Transceiver

Claims

With multiple antennas shared for transmission and reception,
Antenna selection means for single-selecting or selecting a plurality of the plurality of antennas;
Two duplexers for passing a radio signal of a transmission frequency and a radio signal of a reception frequency, respectively;
First receiving means for receiving a radio signal having a reception frequency that has passed through one of the two duplexers;
Second receiving means for receiving a radio signal having a reception frequency that has passed through the other of the two duplexers;
Switch means for distributing a radio signal of a transmission frequency to the one duplexer side or the other duplexer side;
In the diversity reception mode, the antenna selection unit is controlled to switch one of the plurality of antennas to the first reception unit side, and the other to the second reception unit side, and transmit in the diversity reception mode state. When performing, the switch means is controlled so as to supply a radio signal having a transmission frequency to the antenna that is used at the higher reception signal level of the first reception means and the second reception means. Control means;
A transmission / reception device comprising:

With multiple antennas shared for transmission and reception,
Antenna selection means for single-selecting or selecting a plurality of the plurality of antennas;
First and second filters that pass only radio signals of a reception frequency;
A third filter that passes only radio signals of the transmission frequency;
First receiving means for receiving a radio signal having a reception frequency that has passed through the first filter;
Second receiving means for receiving a radio signal having a reception frequency that has passed through the second filter;
Switch means for distributing a radio signal of a transmission frequency to one of the plurality of antennas via the antenna selection means;
In the diversity reception mode, the antenna selection unit is controlled to switch one of the plurality of antennas to the first reception unit side, and the other to the second reception unit side, and transmit in the diversity reception mode state. When performing, the switch means is controlled so as to supply a radio signal having a transmission frequency to the antenna that is used at the higher reception signal level of the first reception means and the second reception means. Control means;
A transmission / reception device comprising:

For phase matching between the switch means and the first filter, between the switch means and the second filter, and between the switch means and the third filter, respectively. The transmission / reception apparatus according to claim 2, comprising three matching means.

A communication apparatus comprising the transmission / reception device according to any one of claims 1 to 3.

A plurality of antennas shared for transmission and reception can be selected singularly or a plurality of antennas can be selected, and a radio signal having a reception frequency that has passed through one of two duplexers that passes a radio signal having a transmission frequency and a radio signal having a reception frequency can be received first. Means, and a radio signal having a reception frequency that has passed through the other of the two duplexers is received by the second receiving means, and in the diversity reception mode, one of the plurality of antennas is connected to the first receiving means side. When the other side is switched to the second receiving means side and transmission is performed in the diversity reception mode state, it is used at the higher receiving signal level of the first receiving means and the second receiving means. A transmission / reception method for supplying a radio signal having a transmission frequency to the antenna.

A plurality of antennas that can be used for both transmission and reception can be single-selected or a plurality of antennas can be selected, and a radio signal from a first filter that allows only a radio signal of a reception frequency to pass through is received by the first receiving means, and only a radio signal of the reception frequency is received. The radio signal from the second filter that passes through is received by the second receiving means, and in the diversity reception mode, one of the plurality of antennas is switched to the first receiving means side, and the other is switched to the second receiving means. When switching to the reception means side and performing transmission in the diversity reception mode state, the transmission frequency of the first reception means and the second reception means, which is used at the higher reception signal level, is transmitted to the antenna. A transmission / reception method for supplying a radio signal having a transmission frequency through a third filter that allows only a radio signal to pass.