JPH11154887A - Radio equipment - Google Patents
Radio equipmentInfo
- Publication number
- JPH11154887A JPH11154887A JP10272682A JP27268298A JPH11154887A JP H11154887 A JPH11154887 A JP H11154887A JP 10272682 A JP10272682 A JP 10272682A JP 27268298 A JP27268298 A JP 27268298A JP H11154887 A JPH11154887 A JP H11154887A
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- signal
- frequency divider
- local
- oscillator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Transceivers (AREA)
- Transmitters (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は無線機に関し、特
に、送信変調用局部信号の発生方式に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio, and more particularly to a method for generating a local signal for transmission modulation.
【０００２】[0002]
【従来の技術】従来、この種の無線機の送信部は、図３
に示すように、無線機の送信部は、送信変調データ入力
端子３０と、２値／４値変換器３１と、ロールオフ濾波
器３２と、直交変調器３３と、直交変調用局部信号発振
器３４と、バッファ増幅器３５と、送信用混合器３６
と、第１局部信号注入端子３７と、濾波器３８と、送信
用高周波出力端子３９とを有する。2. Description of the Related Art Conventionally, a transmitting unit of this kind of radio is shown in FIG.
As shown in (1), the transmission unit of the wireless device includes a transmission modulation data input terminal 30, a binary / quaternary converter 31, a roll-off filter 32, a quadrature modulator 33, and a quadrature modulation local signal oscillator 34. , A buffer amplifier 35 and a transmission mixer 36
, A first local signal injection terminal 37, a filter 38, and a transmission high-frequency output terminal 39.
【０００３】２値／４値変換器３１は、送信変調データ
入力端子３０から入力される２値データを４値データに
変換する。この４値データは、ロールオフ濾波器３２に
よって同相信号（Ｉ信号）８ａと直交信号（Ｑ信号）８
ｂに変換される。これらＩ信号８ａとＱ信号８ｂは変調
信号として直交変調器３３に供給される。また、直交変
調器３３には、直交変調用局部信号発振器３４から出力
される中間周波数の局部信号がバッファ増幅器３５を経
て注入される。直交変調器３３は、局部信号を変調信号
（Ｉ信号８ａとＱ信号８ｂと）に基づいて直交変調し、
変調した信号を出力する。この変調した信号は送信用混
合器３６に供給される。送信用混合器３６には第１局部
信号注入端子３７から第１局部信号が注入される。送信
用混合器３６は変調した信号と第１局部信号とを混合し
て、混合した信号を出力する。混合した信号は濾波器３
８により所要の周波数成分のみ通過され、送信波として
送信用高周波出力端子３９から送信される。[0003] A binary / quaternary converter 31 converts binary data input from a transmission modulation data input terminal 30 into quaternary data. This quaternary data is converted into an in-phase signal (I signal) 8 a and a quadrature signal (Q signal) 8 by a roll-off filter 32.
b. These I signal 8a and Q signal 8b are supplied to the quadrature modulator 33 as modulation signals. The quadrature modulator 33 is supplied with an intermediate frequency local signal output from the quadrature modulation local signal oscillator 34 via a buffer amplifier 35. The quadrature modulator 33 quadrature-modulates the local signal based on the modulation signals (I signal 8a and Q signal 8b),
Output the modulated signal. The modulated signal is supplied to the transmission mixer 36. A first local signal is injected into the transmission mixer 36 from a first local signal injection terminal 37. The transmission mixer 36 mixes the modulated signal and the first local signal, and outputs a mixed signal. The mixed signal is filtered by filter 3
8, only the required frequency components are passed and transmitted from the transmission high-frequency output terminal 39 as transmission waves.
【０００４】尚、本発明に関連する先行技術として、特
開平１−３０５７２７号公報には、基準信号を発生する
基準発振器と、基準信号を分周、てい倍して所定の周波
数の信号をそれぞれ出力する複数の信号発生部とを備
え、信号発生部の各々が、分周器とてい倍器とから構成
されている「局発用周波数シンセサイザ」が開示されて
いる。As a prior art related to the present invention, Japanese Patent Laid-Open Publication No. Hei 1-305727 discloses a reference oscillator for generating a reference signal and a signal of a predetermined frequency by dividing and multiplying the reference signal. A "local oscillator frequency synthesizer" is disclosed, which includes a plurality of signal generators for outputting, and each of the signal generators includes a frequency divider and a multiplier.
【０００５】[0005]
【発明が解決しようとする課題】上述した従来の無線機
の送信部において、直交変調用局部信号発振器３４とし
ては、通常、ＰＬＬ方式周波数シンセサイザが使用され
る。ＰＬＬ方式周波数シンセサイザはその発振出力を停
止させると、次の立ち上がりまでのシンセサイザのロッ
ク時間などが必要となる。その為、送信オン／オフのタ
イミングの短い無線機では、一般にＰＬＬ方式周波数シ
ンセサイザを発振させたままにしておく。これは、第１
局部信号注入端子３７から注入される第１局部信号に対
しても同じことが言え、通常、第１局部信号は無線機の
受信部で使用される受信局部信号と兼用することから、
やはり第１局部信号注入端子３７には第１局部信号が注
入されたままとなる。この場合、送信オフ時、すなわ
ち、受信時での送信波の影響による受信特性の劣化が問
題となる。たとえば、小型の無線機では、発振器どうし
のアイソレーションが十分に得られなくなり、受信特性
の劣化につながる。また、扱う周波数が高くなればなる
程、送信用混合器３６、直交変調器３３の動作を止めて
も、発振器３４から発振した局部信号および第１局部信
号注入端子３７から注入される第１局部信号がリークし
て、やはり受信特性の劣化につながる。In the transmitting section of the above-mentioned conventional radio, a PLL type frequency synthesizer is usually used as the local signal oscillator 34 for quadrature modulation. When the oscillation output of the PLL type frequency synthesizer is stopped, a lock time of the synthesizer until the next rise is required. For this reason, in a wireless device having a short transmission ON / OFF timing, the PLL frequency synthesizer is generally kept oscillating. This is the first
The same can be said for the first local signal injected from the local signal injection terminal 37. Usually, the first local signal is also used as the receiving local signal used in the receiving unit of the wireless device.
Also, the first local signal is still injected into the first local signal injection terminal 37. In this case, when transmission is off, that is, at the time of reception, deterioration of reception characteristics due to the influence of transmission waves becomes a problem. For example, in a small wireless device, sufficient isolation between oscillators cannot be obtained, which leads to deterioration of reception characteristics. Also, as the frequency to be handled becomes higher, even if the operation of the transmission mixer 36 and the quadrature modulator 33 is stopped, the local signal oscillated from the oscillator 34 and the first local signal injected from the first local signal injection terminal 37 are obtained. A signal leaks, which also leads to deterioration of reception characteristics.
【０００６】さらに、送信波を送信混合器３６にてミッ
クスアップして得ているため、送信混合器３６から出力
される送信波には不要スプリアスが多い。このことは、
濾波器３８の不要スプリアス除去能力を上げなければな
らないことを意味し、濾波器３８は大型でかつ高価なも
のとなる。Further, since the transmission wave is obtained by mixing up in the transmission mixer 36, the transmission wave output from the transmission mixer 36 has many unnecessary spurious components. This means
This means that the unnecessary spurious removal capability of the filter 38 must be increased, and the filter 38 is large and expensive.
【０００７】それ故に本発明の課題は、受信部の特性劣
化を抑えることができる、安価かつ簡単な構成の無線機
を提供することにある。It is therefore an object of the present invention to provide an inexpensive and simple radio apparatus which can suppress the deterioration of the characteristics of the receiving section.
【０００８】本発明の他の課題は、不要スプリアスの少
ない、安価かつ簡単な構成の無線機を提供することにあ
る。Another object of the present invention is to provide a low-cost and simple-structure radio apparatus with little unnecessary spurious.
【０００９】尚、上記先行技術には、分周器をどのよう
に制御するかについての記載がない。The above prior art does not describe how to control the frequency divider.
【００１０】[0010]
【課題を解決するための手段】本発明の無線機は、発振
器の出力を第１の分周器で分周し送信部の局部信号と
し、第２の分周器で分周し受信部の局部信号とする無線
機において、前記第１の分周器は、送信時には分周動作
をさせ、受信時には分周動作を停止することを特徴とす
る。According to a radio device of the present invention, the output of an oscillator is divided by a first divider to be a local signal of a transmitting section, and is divided by a second divider to be divided by a second divider. In a wireless device using local signals, the first frequency divider performs a frequency division operation during transmission, and stops the frequency division operation during reception.
【００１１】また、発振器の出力を第１の分周器で分周
し送信部の局部信号とし、第２の分周器で分周し受信部
の局部信号とする無線機において、送信時には前記第１
の分周器は動作状態であり、受信時には前記第１の分周
器は非動作状態で、かつ、前記第２の分周器は動作状態
であることを特徴とする。Also, in a radio device, the output of the oscillator is divided by a first divider to produce a local signal of a transmitting section, and the output of the oscillator is divided by a second divider to produce a local signal of a receiving section. First
Are in an operating state, the first frequency divider is in an inactive state during reception, and the second frequency divider is in an operating state.
【００１２】さらに、発振器の出力を第１の分周器で分
周し、逓倍器で逓倍し送信部の局部信号とし、この発振
器からの経路の途中にバッファ増幅器を介して直交変調
器に入力する無線機において、受信時には前記第１の分
周器を非動作状態にする他、バッファ増幅器、逓倍器ま
たは直交変調器のうち、１または２以上の動作を停止す
ることを特徴とする。Further, the output of the oscillator is frequency-divided by a first frequency divider and multiplied by a frequency multiplier to produce a local signal of a transmission unit. The signal is input to a quadrature modulator via a buffer amplifier on the way from the oscillator. In the wireless device, the first frequency divider is deactivated at the time of reception, and one or two or more of the buffer amplifier, the multiplier, and the quadrature modulator are stopped.
【００１３】[0013]
【発明の実施の形態】次に、本発明について図面を参照
して詳細に説明する。Next, the present invention will be described in detail with reference to the drawings.
【００１４】図１を参照して、本発明の第１の実施例に
よる無線機の送信部について説明する。図１では、無線
機の送信部のうち直交変調に係わる部分のみを図示して
いる。無線機の送信部は、発振器１と、バッファ増幅器
２と、２分周器３と、３逓倍器４と、バンドパスフィル
タ５と、直交変調器６と、ロールオフ濾波器７と、送信
用高周波出力端子９とを有する。Referring to FIG. 1, a description will be given of a transmission unit of a wireless device according to a first embodiment of the present invention. FIG. 1 illustrates only a part related to the quadrature modulation in the transmission unit of the wireless device. The transmitting unit of the radio includes an oscillator 1, a buffer amplifier 2, a frequency divider 2, a frequency multiplier 3, a band-pass filter 5, a quadrature modulator 6, a roll-off filter 7, And a high-frequency output terminal 9.
【００１５】本実施例において、発振器１はＰＬＬ方式
周波数シンセサイザから構成されており、任意の周波数
を設定することができるが、発振器１から発振する発振
信号の発振周波数を、送信用高周波出力端子９に出力さ
れる変調した信号（局部信号）の局部周波数Ｆの２／３
倍に設定する。２分周器３は図示しない制御回路によっ
てその動作、非動作が制御される。すなわち、送信時に
は、２分周器３は動作状態におかれ、受信時には、２分
周器３は非動作状態におかれる。In this embodiment, the oscillator 1 is composed of a PLL type frequency synthesizer and can set an arbitrary frequency. The oscillation frequency of the oscillation signal oscillated from the oscillator 1 is output to the transmission high frequency output terminal 9.変 調 of the local frequency F of the modulated signal (local signal) output to
Set to double. The operation and non-operation of the 2 frequency divider 3 are controlled by a control circuit (not shown). That is, at the time of transmission, the 、 ２ frequency divider 3 is in an operating state, and at the time of reception, the 分 frequency divider 3 is in an inactive state.
【００１６】送信時には、発振器１から発振された発振
周波数（２Ｆ／３）をもつ発振信号は、バッファ増幅器
２を介して２分周器３に供給される。２分周器３は発振
信号の発振周波数（２Ｆ／３）を２分周し、分周周波数
（Ｆ／３）をもつ２分周した信号を出力する。この２分
周した信号は３逓倍器４に供給される。３逓倍器４は２
分周した信号の分周周波数（Ｆ／３）を３逓倍し、逓倍
周波数Ｆをもつ３逓倍した信号を出力する。この３逓倍
器４から出力される３逓倍した信号には不要スプリアス
が多い。不要スプリアスとしては、局部周波数Ｆに対し
て、（１／３）倍、（２／３）倍、（４／３）倍、（５
／３）倍というように離れた周波数のスプリアスであ
る。このため、不要スプリアスを除去するためのバンド
パスフィルタ５としては、小型で安価なものを選択でき
る。At the time of transmission, an oscillating signal having an oscillating frequency (2F / 3) oscillated from the oscillator 1 is supplied to the ２ frequency divider 3 via the buffer amplifier 2. The divide-by-2 frequency divider 3 divides the oscillation frequency (2F / 3) of the oscillation signal by 2, and outputs a divide-by-2 signal having the division frequency (F / 3). The frequency-divided signal is supplied to the tripler 4. The tripler 4 is 2
The divided frequency (F / 3) of the frequency-divided signal is multiplied by three, and a signal having the multiplied frequency F and multiplied by three is output. The tripled signal output from the tripler 4 has many unnecessary spurious components. The unnecessary spurious components are (1/3), (2/3), (4/3) and (5) times the local frequency F.
/ 3) Spurious at frequencies separated by a factor of twice. Therefore, a small and inexpensive bandpass filter 5 can be selected as the bandpass filter 5 for removing unnecessary spurious components.
【００１７】バンドパスフィルタ５は局部周波数Ｆの局
部信号を直交変調器６に供給する。また、直交変調器６
にはロールオフ濾波器７からＩ信号８ａおよびＱ信号８
ｂが供給される。直交変調器６は局部信号をＩ信号８ａ
およびＱ信号８ｂに基づいて直交変調し、送信波として
送信用高周波出力端子９から出力する。The band pass filter 5 supplies a local signal having a local frequency F to a quadrature modulator 6. Further, the quadrature modulator 6
The I signal 8a and the Q signal 8 from the roll-off filter 7
b is supplied. The quadrature modulator 6 converts the local signal into an I signal 8a.
And a quadrature modulation based on the Q signal 8b and output from the transmission high-frequency output terminal 9 as a transmission wave.
【００１８】一方、受信時には、発振器１は動作してい
るが、少なくとも２分周器２はその動作が停止させられ
る。このようにすることにより、発振器１から出力され
る発振信号の発振周波数（２Ｆ／３）はスプリアスとし
て残るが、そのハーモニックスプリアスは局部周波数Ｆ
の（４／３）倍、（６／３）倍、（９／３）倍となり、
局部周波数Ｆそのものは発生しない。On the other hand, at the time of reception, the oscillator 1 is operating, but the operation of at least the frequency divider 2 is stopped. By doing so, the oscillation frequency (2F / 3) of the oscillation signal output from the oscillator 1 remains as spurious, but its harmonic spurious is reduced to the local frequency F.
(4/3), (6/3) and (9/3) times of
The local frequency F itself does not occur.
【００１９】このため、局部周波数Ｆによる受信特性の
劣化をなくすことができる。尚、この時、バッファ増幅
器２、３逓倍器４、直交変調器６の動作を停止させてお
くと、受信特性への影響をより少なくすることができ
る。For this reason, it is possible to eliminate the deterioration of the reception characteristics due to the local frequency F. At this time, if the operations of the buffer amplifier 2, the frequency multiplier 4, and the quadrature modulator 6 are stopped, the influence on the reception characteristics can be further reduced.
【００２０】図２を参照して、本発明の第２の実施例に
よる無線機について説明する。図２では、無線機の送信
部のうち直交変調に係わる部分と、受信部のうち復調部
までを示す。このうち、直交変調に係わる部分は図１と
同じである。本実施例では、受信部として、受信入力端
子２０、高周波増幅器２１、高周波第１混合器２２、第
１局部発振器２３、第１中間周波濾波器２４、第２混合
器２５、第２中間周波濾波器２６、第２中間周波増幅器
２７、復調器２８、受信復調データ出力端子２９、およ
び５分周器１０とを有する。５分周器１０は、バッファ
増幅器２を介して発振器１から供給される発振信号の発
振周波数（２Ｆ／３）を５分周して、周波数（２Ｆ／１
５）をもつ５分周した信号を第２局部信号として第２混
合器２５へ供給する。Referring to FIG. 2, a radio device according to a second embodiment of the present invention will be described. FIG. 2 shows a part related to the quadrature modulation in the transmission unit of the wireless device and a demodulation unit in the reception unit. Among them, the portion related to the quadrature modulation is the same as that in FIG. In this embodiment, as a receiving unit, a receiving input terminal 20, a high-frequency amplifier 21, a high-frequency first mixer 22, a first local oscillator 23, a first intermediate frequency filter 24, a second mixer 25, a second intermediate frequency filtering , A second intermediate frequency amplifier 27, a demodulator 28, a reception demodulation data output terminal 29, and a ５ frequency divider 10. The ５ frequency divider 10 divides the oscillation frequency (2F / 3) of the oscillation signal supplied from the oscillator 1 via the buffer amplifier 2 by 5 and divides the frequency by (5F / 1).
The signal divided by 5 having the above (5) is supplied to the second mixer 25 as a second local signal.
【００２１】送信時の動作は、図１に示した無線機の送
信部と同様なのでここでは省略し、以下では、受信時の
動作について説明する。The operation at the time of transmission is the same as that of the transmission unit of the wireless device shown in FIG. 1, and therefore is omitted here, and the operation at the time of reception will be described below.
【００２２】受信時、発振器１から出力される発振周波
数（２Ｆ／３）の発振信号は、バッファ増幅器２を介し
て５分周器１０に供給される。５分周器１０は発振信号
の発振周波数（２Ｆ／３）を（１／５）にし、周波数
（２Ｆ／１５）をもつ５分周した信号を第２局部信号と
して第２混合器２５へ供給する。At the time of reception, an oscillation signal having an oscillation frequency (2F / 3) output from the oscillator 1 is supplied to the ５ frequency divider 10 via the buffer amplifier 2. The ５ frequency divider 10 sets the oscillation frequency (2F / 3) of the oscillation signal to (１ ／), and supplies the frequency-divided signal having the frequency (2F / 15) to the second mixer 25 as a second local signal. I do.
【００２３】一方、受信入力端子２０に入力される受信
信号は、高周波増幅器２１で増幅され、高周波第１混合
器２２に供給される。高周波第１混合器２２には第１局
部発振器２３で発振された第１局部発振信号が供給され
る。高周波第１混合器２２は受信信号と第１局部発振信
号とを混合し、第１の中間周波数を含む第１の混合した
信号を出力する。第１局部発振器２３は、ＰＬＬ方式周
波数シンセサイザで構成されており、任意の周波数を設
定できる。第１中間周波濾波器２４は第１の混合した信
号から不要周波数成分を除去して、第１の中間周波信号
を出力する。第１の中間周波信号は第２混合器２５に供
給される。第２混合器２５はこの第１の中間周波信号と
上記第２局部信号とを混合して、第２中間周波数を含む
第２の混合した信号を出力する。第２中間周波濾波器２
６は第２の混合した信号から不要周波数成分を除去し
て、第２の中間周波信号を出力する。この第２の中間周
波信号は第２中間周波増幅器２７で十分増幅された後、
復調器２８で復調される。復調器２８で復調された信号
は、受信データとして受信復調データ出力端子２９から
出力される。On the other hand, the reception signal input to the reception input terminal 20 is amplified by the high frequency amplifier 21 and supplied to the high frequency first mixer 22. The first local oscillator signal oscillated by the first local oscillator 23 is supplied to the high frequency first mixer 22. The high-frequency first mixer 22 mixes the received signal and the first local oscillation signal, and outputs a first mixed signal including a first intermediate frequency. The first local oscillator 23 is composed of a PLL frequency synthesizer, and can set an arbitrary frequency. The first intermediate frequency filter 24 removes unnecessary frequency components from the first mixed signal and outputs a first intermediate frequency signal. The first intermediate frequency signal is supplied to the second mixer 25. The second mixer 25 mixes the first intermediate frequency signal and the second local signal, and outputs a second mixed signal including the second intermediate frequency. 2nd intermediate frequency filter 2
6 removes unnecessary frequency components from the second mixed signal and outputs a second intermediate frequency signal. After the second intermediate frequency signal is sufficiently amplified by the second intermediate frequency amplifier 27,
The signal is demodulated by the demodulator 28. The signal demodulated by demodulator 28 is output from reception demodulation data output terminal 29 as reception data.
【００２４】この結果、５分周器１０を用いれば、無線
機の受信部の第２局部発振器をなくすことができ、機器
の小型化、経済化を図ることができる。As a result, if the 、 ５ frequency divider 10 is used, the second local oscillator of the receiving section of the radio device can be eliminated, and the size and cost of the device can be reduced.
【００２５】本発明は上述した実施例に限定されず、本
発明の要旨を逸脱しない範囲内で種々の変更が可能であ
るのは勿論である。例えば、２分周器３の代わりに、一
般に、Ｎ分周器を使用しても良い。また、３逓倍器４の
代わりに、一般に、Ｍ逓倍器を使用しても良い。The present invention is not limited to the above-described embodiment, and it is needless to say that various modifications can be made without departing from the gist of the present invention. For example, an N frequency divider may be generally used instead of the frequency divider 2. Further, instead of the tripler 4, an M multiplier may be generally used.
【００２６】[0026]
【発明の効果】以上説明したように本発明では、発振器
の出力を第１の分周器で分周し送信部の局部信号とし、
第２の分周器で分周し受信部の局部信号とする無線機に
おいて、 前記第１の分周器は、送信時には分周動作を
させ、受信時には分周動作を停止させるようにしたの
で、送信部による受信特性の劣化をなくし、かつ送信部
の不要スプリアスも構成の簡単なバンドパスフィルタで
除去することができる。また、発振信号をＬ分周して、
Ｌ分周した信号を出力するＬ分周器を具備したことによ
り、受信時の第２局部発振器をなくすことができるた
め、無線機の小型化、経済化を図ることができる。As described above, according to the present invention, the output of the oscillator is frequency-divided by the first frequency divider to be a local signal of the transmission unit.
In a wireless device that performs frequency division by the second frequency divider and generates a local signal of the reception unit, the first frequency divider performs a frequency division operation during transmission and stops the frequency division operation during reception. In addition, it is possible to eliminate the deterioration of the reception characteristics due to the transmission unit and to remove unnecessary spurious components of the transmission unit by using a band-pass filter having a simple configuration. Also, the oscillation signal is divided by L,
The provision of the L divider that outputs the L-divided signal eliminates the need for the second local oscillator at the time of reception, so that it is possible to reduce the size and cost of the wireless device.
【図１】本発明の第１の実施例による無線機の送信部の
うち直交変調に係わる部分のみを示すブロック図であ
る。FIG. 1 is a block diagram showing only a part related to quadrature modulation in a transmission unit of a wireless device according to a first embodiment of the present invention.
【図２】本発明の第２の実施例による無線機の送信部の
うち直交変調に係わる部分と、受信部のうち復調部まで
を示すブロック図である。FIG. 2 is a block diagram illustrating a part related to quadrature modulation in a transmitting unit of a wireless device according to a second embodiment of the present invention and a demodulating unit in a receiving unit.
【図３】従来の無線機の送信部を示すブロック図であ
る。FIG. 3 is a block diagram illustrating a transmission unit of a conventional wireless device.
１ 発振器 ２ バッファ増幅器 ３ 分周器（２分周器、Ｎ分周器） ４ 逓倍器（Ｍ逓倍器、３逓倍器） ５ バンドパスフィルタ ６ 直交変調器 ７ ロールオフ濾波器 ８ａ 同相信号（Ｉ信号） ８ｂ 直交信号（Ｑ信号） ９ 送信用高周波出力端子 １０ ５分周器（Ｌ分周器） ２０ 受信入力端子 ２１ 高周波増幅器 ２２ 高周波第１混合器 ２３ 第１局部発振器 ２４ 第１中間周波濾波器 ２５ 第２混合器 ２６ 第２中間周波濾波器 ２７ 第２中間周波増幅器 ２８ 復調器 ２９ 受信復調データ出力端子 DESCRIPTION OF SYMBOLS 1 Oscillator 2 Buffer amplifier 3 Frequency divider (2 frequency divider, N frequency divider) 4 Multiplier (M frequency multiplier, 3 frequency multiplier) 5 Bandpass filter 6 Quadrature modulator 7 Roll-off filter 8a In-phase signal ( 8b Quadrature signal (Q signal) 9 High frequency output terminal for transmission 10 5 frequency divider (L frequency divider) 20 Reception input terminal 21 High frequency amplifier 22 High frequency first mixer 23 First local oscillator 24 First intermediate frequency Filter 25 Second mixer 26 Second intermediate frequency filter 27 Second intermediate frequency amplifier 28 Demodulator 29 Received demodulated data output terminal
Claims (3)
信部の局部信号とし、第２の分周器で分周し受信部の局
部信号とする無線機において、 前記第１の分周器は、送信時には分周動作をさせ、受信
時には分周動作を停止することを特徴とする無線機。1. A radio apparatus wherein an output of an oscillator is frequency-divided by a first frequency divider to be a local signal of a transmitting section, and a frequency is frequency-divided by a second frequency divider to be a local signal of a receiving section. A frequency divider for performing a frequency dividing operation at the time of transmission and stopping the frequency dividing operation at the time of reception.
信部の局部信号とし、第２の分周器で分周し受信部の局
部信号とする無線機において、 送信時には前記第１の分周器は動作状態であり、 受信時には前記第１の分周器は非動作状態で、かつ、前
記第２の分周器は動作状態であることを特徴とする無線
機。2. A radio device in which the output of an oscillator is divided by a first frequency divider to generate a local signal of a transmitting unit, and divided by a second frequency divider to generate a local signal of a receiving unit. A radio device, wherein the first frequency divider is in an operating state, the first frequency divider is in an inactive state during reception, and the second frequency divider is in an operating state.
逓倍器で逓倍し送信部の局部信号とし、この発振器から
の経路の途中にバッファ増幅器を介して直交変調器に入
力する無線機において、 受信時には前記第１の分周器を非動作状態にする他、バ
ッファ増幅器、逓倍器または直交変調器のうち、１また
は２以上の動作を停止することを特徴とする請求項１ま
たは請求項２記載の無線機。3. An oscillator output is frequency-divided by a first frequency divider.
In a radio device which multiplies the signal by a multiplier to generate a local signal of a transmitting unit and inputs the signal to a quadrature modulator via a buffer amplifier in the middle of a path from the oscillator, the first frequency divider is deactivated during reception. 3. The wireless device according to claim 1, wherein one or more operations of the buffer amplifier, the multiplier, and the quadrature modulator are stopped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10272682A JPH11154887A (en) | 1994-05-06 | 1998-09-28 | Radio equipment |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6094127A JPH07303059A (en) | 1994-05-06 | 1994-05-06 | Radio equipment |
| JP10272682A JPH11154887A (en) | 1994-05-06 | 1998-09-28 | Radio equipment |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6094127A Division JPH07303059A (en) | 1994-05-06 | 1994-05-06 | Radio equipment |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001247595A Division JP2002135163A (en) | 2001-08-17 | 2001-08-17 | Radio device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11154887A true JPH11154887A (en) | 1999-06-08 |
Family
ID=14101757
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6094127A Pending JPH07303059A (en) | 1994-05-06 | 1994-05-06 | Radio equipment |
| JP10272682A Pending JPH11154887A (en) | 1994-05-06 | 1998-09-28 | Radio equipment |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6094127A Pending JPH07303059A (en) | 1994-05-06 | 1994-05-06 | Radio equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (2) | JPH07303059A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09275356A (en) * | 1996-04-08 | 1997-10-21 | Matsushita Electric Ind Co Ltd | Plural mode mobile radio equipment |
| JPH09275358A (en) * | 1996-04-08 | 1997-10-21 | Matsushita Electric Ind Co Ltd | Plural-band mobile radio equipment |
| JPH11112462A (en) * | 1997-08-08 | 1999-04-23 | Sony Corp | Receiver for digital broadcast |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60126931A (en) * | 1983-12-12 | 1985-07-06 | Nippon Telegr & Teleph Corp <Ntt> | Frequency generation system of radio communication system |
| JPH01305727A (en) * | 1988-06-03 | 1989-12-11 | Anritsu Corp | Frequency synthesizer for station origination |
| JP2623931B2 (en) * | 1990-07-11 | 1997-06-25 | 日本電気株式会社 | Phase-synchronized transceiver |
| JPH05206917A (en) * | 1992-01-29 | 1993-08-13 | Sony Corp | Transmission/reception device of time division duplex system or time division multiple access/time division duplex system |
-
1994
- 1994-05-06 JP JP6094127A patent/JPH07303059A/en active Pending
-
1998
- 1998-09-28 JP JP10272682A patent/JPH11154887A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07303059A (en) | 1995-11-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100397716B1 (en) | Transmitter and Transceiver | |
| JPH04240924A (en) | Time division duplex signal radio transmitter-receiver | |
| JPH06291697A (en) | Transmitter receiver | |
| JPH06152467A (en) | Radio communication equipment | |
| JPH08204763A (en) | Transmitter and transmitter-receiver | |
| JPH09219664A (en) | Radio transmitter-receiver | |
| JP2001230695A (en) | Radio equipment and frequency conversion method to be used therefor | |
| JP3309904B2 (en) | Wireless transceiver | |
| JP2001352355A (en) | Direct conversion receiver and transmitter-receiver | |
| US6021164A (en) | Digital radio communication system having reduced phase-locked loop, and its synchronization | |
| JPH11154887A (en) | Radio equipment | |
| JP2002135163A (en) | Radio device | |
| JP4110668B2 (en) | Signal generator | |
| JP3464147B2 (en) | Transceiver | |
| JP3056172B2 (en) | Mobile phone equipment | |
| JP3105381B2 (en) | QPSK modulator and QPSK demodulator | |
| JP3884923B2 (en) | Transceiver | |
| JPS61103324A (en) | Synthesizer circuit of radio communication equipment | |
| JPH10327090A (en) | Transmitter-receiver of superheterodyne system | |
| JPH07321694A (en) | Communication equipment of time-division multiplex access duplex operation system | |
| JPH02112323A (en) | Radio communication equipment | |
| JP2005527136A (en) | Circuit structure for frequency conversion and mobile radio apparatus having this circuit structure | |
| JP2004023653A (en) | Wireless transmitter-receiver | |
| JPH09298496A (en) | Transmitter-receiver for pilot signal | |
| JPH08317002A (en) | Communication equipment by quadrature modulation system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20010619 |