JP2796969B2 - Mobile radio equipment - Google Patents
Mobile radio equipmentInfo
- Publication number
- JP2796969B2 JP2796969B2 JP63022823A JP2282388A JP2796969B2 JP 2796969 B2 JP2796969 B2 JP 2796969B2 JP 63022823 A JP63022823 A JP 63022823A JP 2282388 A JP2282388 A JP 2282388A JP 2796969 B2 JP2796969 B2 JP 2796969B2
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- reference oscillator
- output
- mobile radio
- transmission
- 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.)
- Expired - Fee Related
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Transceivers (AREA)
- Mobile Radio Communication Systems (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、自動車電話等のような同時送受信を行う移
動無線装置に関する。Description: TECHNICAL FIELD The present invention relates to a mobile wireless device that performs simultaneous transmission and reception, such as an automobile telephone.
（従来の技術） 一般に移動無線装置は送受信周波数源として、独立、
または送受信共通の周波数シンセサイザを有して、その
出力周波数を変更することにより所定の無線チャネル周
波数を生成し基地局との通信を可能にしている。したが
って、移動無線装置の送受信周波数の安定度は主に周波
数シンセサイザの安定度によって決定される。(Prior Art) Generally, a mobile radio device is an independent,
Alternatively, a common frequency synthesizer for transmission and reception is provided, and by changing its output frequency, a predetermined radio channel frequency is generated to enable communication with a base station. Therefore, the stability of the transmission / reception frequency of the mobile radio device is mainly determined by the stability of the frequency synthesizer.
第２図は、そのような送受信周波数を共通の周波数シ
ンセサイザによって生成する従来の移動無線装置の構成
を示すブロック図であり、Ａは送信部、Ｂは周波数シン
セサイザ、Ｃは受信部を示している。FIG. 2 is a block diagram showing a configuration of a conventional mobile radio apparatus that generates such a transmission / reception frequency by a common frequency synthesizer, where A indicates a transmission unit, B indicates a frequency synthesizer, and C indicates a reception unit. .
１はアンテナで、送受信共通に使用するためのアンテ
ナ共用器２に接続されている。３は発振周波数をＦとす
る発振器、４は周波数ミキサ、５は電力増幅器である。
また周波数シンセサイザＢにおいて、６は周波数ｆを発
振する第１の基準発振器、７は電圧制御発振器（以下、
VCOという）、８はVCO7の発振周波数をＮ分周する分周
器（ただし、Ｎは任意の正の整数）、９は位相比較器で
VCO7の出力と第１の基準発振器６の出力信号の位相を比
較する。10は位相比較器９の誤差電圧出力に含まれる雑
音を除去するための低域ろ波器（以下、LPFという）で
ある。また11は高周波増幅器（以下、RF.AMPという）、
12は周波数ミキサ、13は中間周波増幅器（以下IF.AMPと
いう）で、その中間周波数をfIFとする。An antenna 1 is connected to an antenna duplexer 2 used for both transmission and reception. 3 is an oscillator having an oscillation frequency of F, 4 is a frequency mixer, and 5 is a power amplifier.
In the frequency synthesizer B, reference numeral 6 denotes a first reference oscillator that oscillates a frequency f, and reference numeral 7 denotes a voltage controlled oscillator (hereinafter, referred to as a frequency controlled oscillator).
8 is a frequency divider for dividing the oscillation frequency of the VCO 7 by N (where N is any positive integer), and 9 is a phase comparator
The phase of the output of the VCO 7 and the phase of the output signal of the first reference oscillator 6 are compared. Reference numeral 10 denotes a low-pass filter (hereinafter, referred to as LPF) for removing noise included in the error voltage output of the phase comparator 9. 11 is a high frequency amplifier (hereinafter referred to as RF.AMP),
12 frequency mixer, 13 an intermediate frequency amplifier (hereinafter referred IF.AMP), to the intermediate frequency and f IF.
これらVCO7、分周器８、位相比較器９および、LPF10
によってPLL（位相制御）周波数シンセサイザが構成さ
れ、VCO7の発振周波数は、分周数Ｎと第１の基準発振器
６の発振周波数ｆの積、Ｎ×ｆに形成されて送信部6Aま
たは受信部Ｃにそれぞれ有する周波数ミキサ４または12
に供給される。These VCO 7, frequency divider 8, phase comparator 9 and LPF 10
A PLL (Phase Control) frequency synthesizer is configured, and the oscillation frequency of the VCO 7 is formed as N × f, which is the product of the frequency division number N and the oscillation frequency f of the first reference oscillator 6, and the transmission unit 6A or the reception unit C Frequency mixer 4 or 12 respectively
Supplied to
このような構成により、いま、送信周波数をFTとする
とFT＝Ｎ×ｆ±Ｆ（前記の通り、Ｆは送信部Ａの発振器
３の出力周波数）、また受信周波数FRでは、FR＝Ｎ×ｆ
±fIFとなる（前記の通り、fIFは中間周波数）。この場
合、周波数偏差は、受信周波数FRは第１の基準発振器６
の出力周波数ｆにより、また送信周波数FTは上記第１の
基準発振器６の出力周波数ｆ、および送信部Ａの発振器
３の出力周波数Ｆとにより決定されるが、周波数シンセ
サイザの出力Ｎ×ｆは一般にＮ×ｆ≫Ｆであるため、送
信周波数FTにおいても、その周波数偏差は大略、第１の
基準発振器６の発振周波数ｆの周波数偏差により決定さ
れる。With such a configuration, assuming that the transmission frequency is F T , F T = N × f ± F (F is the output frequency of the oscillator 3 of the transmission unit A as described above), and the reception frequency F R is F R = N × f
± f IF (as described above, f IF is an intermediate frequency). In this case, the frequency deviation is that the reception frequency F R is the first reference oscillator 6
And the transmission frequency F T is determined by the output frequency f of the first reference oscillator 6 and the output frequency F of the oscillator 3 of the transmission unit A. The output N × f of the frequency synthesizer is Generally, since N × f≫F, even at the transmission frequency F T , the frequency deviation is substantially determined by the frequency deviation of the oscillation frequency f of the first reference oscillator 6.
このように従来の移動無線装置によっても分周器８の
分周比Ｎを適当に選ぶことによって、図示しない移動無
線基地局との間に無線通話チャネルを開設することがで
きる。As described above, even with the conventional mobile radio apparatus, by appropriately selecting the frequency division ratio N of the frequency divider 8, a radio communication channel can be established with a mobile radio base station (not shown).
（発明が解決しようとする課題） しかしながら、上述従来の移動無線装置では送受信の
周波数偏差が大略、周波数シンセサイザの基準発振器の
周波数偏差によって決定されるため、無線チャネルの高
周波化、狭帯域化に伴い高安定な基準発振器が必要とな
り、そのため移動無線装置の小形化、ローコスト化、あ
るいは低消費電力化が阻まれる要因となっていた。(Problems to be Solved by the Invention) However, in the above-mentioned conventional mobile radio apparatus, the frequency deviation of transmission and reception is generally determined by the frequency deviation of the reference oscillator of the frequency synthesizer. A highly stable reference oscillator is required, and this has been a factor that hinders miniaturization, low cost, and low power consumption of the mobile wireless device.
本発明は上述に鑑み、送受信周波数の高安定度化を達
成する移動無線装置の提供を目的とする。In view of the above, an object of the present invention is to provide a mobile wireless device that achieves high stability of a transmission / reception frequency.
（課題を解決するための手段） 本発明は上記の目的を、移動無線装置の受信部に新た
に第２の基準発振器と第２の位相比較器を設け、受信周
波数と周波数シンセサイザからの出力信号を混合して得
られる受信中間周波数と、上記第２の基準発振器の出力
周波数および位相とを比較し、その後差電圧出力により
周波数シンセサイザの第１の基準発振周波数を制御する
位相同期回路を構成して、中間周波数偏差が第２の基準
発振器の周波数偏差と等しくなるように制御し、したが
って周波数シンセサイザの周波数偏差を基地局からの、
送信周波数偏差にほぼ等しくなるように構成して達成す
る。(Means for Solving the Problems) The present invention has been made in view of the above-mentioned object, by providing a second reference oscillator and a second phase comparator newly in a receiving section of a mobile radio apparatus, and receiving an output signal from a frequency synthesizer. , And the output frequency and phase of the second reference oscillator are compared with each other, and then a phase locked loop circuit for controlling the first reference oscillation frequency of the frequency synthesizer by the difference voltage output is configured. Controlling the intermediate frequency deviation to be equal to the frequency deviation of the second reference oscillator, and thus the frequency deviation of the frequency synthesizer from the base station,
This is achieved by configuring so as to be substantially equal to the transmission frequency deviation.
（作 用） 以上のように構成する本発明によれば、受信周波数FR
は、装置的にも正確に制御されている基地局の送信周波
数であるから極めて正確であり、一方、局部発振周波数
をFLO±ΔFLOとすれば、これは周波数シンセサイザＢに
有するVCO7の出力Ｎ×ｆに外ならず、その周波数偏差は
第１の基準発振器の周波数偏差Δｆに等しい。したがっ
て、中間周波数FIFは、FIF＝|FR〜FLO±ΔFLO|となる。(Operation) According to the present invention configured as described above, the reception frequency F R
Is extremely accurate because the transmission frequency of the base station that is accurately controlled to a device, the other hand, if the local oscillation frequency and F LO ± ΔF LO, which output VCO7 with the frequency synthesizer B N × f, the frequency deviation of which is equal to the frequency deviation Δf of the first reference oscillator. Therefore, the intermediate frequency F IF is F IF = | F R to F LO ± ΔF LO |.
この中間周波信号は第２の基準発振器の発振周波数F
IF±ΔFIFと比較され、その誤差電圧出力はLPF16により
雑音が除去された後、周波数シソセサイザＢの第１の基
準発振器６に帰還されて位相同期回路が構成され、FIF
±ΔFIF＝|FR〜FLO±ΔFLO|となるように制御される。This intermediate frequency signal is the oscillation frequency F of the second reference oscillator.
Is compared with IF ± [Delta] F IF, that after the error voltage output noise by LPF16 has been removed, the first is fed back to the reference oscillator 6 a phase locked loop frequency Shisosesaiza B is configured, F IF
Control is performed so that ± ΔF IF = | F R to F LO ± ΔF LO |.
すなわち、FIF＝|FR〜FLO|であるからΔFIF＝ΔFLOと
なる。ゆえに例えば、FLO＝900M Hz、FIF＝45M Hz、ΔF
IF＝450Hz（ただし、第２の基準発振器の周波数偏差を1
0ppmとする）とすると、上記からΔFLO＝ΔFIF＝450Hz
となり、周波数シンセサイザの出力は450÷900×106＝
0.5ppmの周波数偏差となる。That is, since F IF = | F R to F LO |, ΔF IF = ΔF LO . Therefore, for example, F LO = 900 MHz, F IF = 45 MHz, ΔF
IF = 450 Hz (however, the frequency deviation of the second reference oscillator is 1
From the above, ΔF LO = ΔF IF = 450 Hz
And the output of the frequency synthesizer is 450 ÷ 900 × 10 6 =
This results in a frequency deviation of 0.5 ppm.
すなわち本発明は、このように周波数偏差が±10ppm
の第２の基準発振器を用いても安定度の高い受信周波数
と位相同期をとって、周波数シンセサイザの第１の基準
発振器を制御することにより、周波数偏差±0.5ppmの安
定な周波数シンセサイザ出力を得ることができ、したが
って安定度の高い送信周波数を得ることが可能になる。That is, the present invention has a frequency deviation of ± 10 ppm.
Even if the second reference oscillator is used, a stable frequency synthesizer output having a frequency deviation of ± 0.5 ppm is obtained by controlling the first reference oscillator of the frequency synthesizer while achieving phase synchronization with a highly stable reception frequency. Therefore, it is possible to obtain a transmission frequency with high stability.
（実施例） 以下、本発明を実施例により図面を用いて詳細に説明
する。(Examples) Hereinafter, the present invention will be described in detail with reference to the drawings using examples.
第１図は本発明の一実施例の移動無線装置を示すブロ
ック図であり、14は第２の基準発振器、15は第２の位相
比較器、16はLPFであり、その他の符号は第２図に使用
したと同じであるから、その説明を援用する。FIG. 1 is a block diagram showing a mobile radio apparatus according to an embodiment of the present invention, in which 14 is a second reference oscillator, 15 is a second phase comparator, 16 is an LPF, and other symbols are the second. Since it is the same as that used in the figure, the description is used.
このような構成において、アンテナ１により基地局の
送信電波、したがって受信電波FRを受信すると、それは
アンテナ共用器２を経てRF.AMP11により増幅され、周波
数ミキサ12においてVCO7の出力FLO±ΔFLOと混合され、
中間周波信号FIF＝|FR〜FLO±ΔFLO|を得る。この中間
周波信号FIFはIF.AMP13により増幅され、その出力は位
相比較器15において第２の基準発振器14から印加される
周波数FIF±ΔFIFと位相比較され、その誤差電圧出力は
LPF16を経て周波数シンセサイザＢ内の第１の基準発振
器に帰還され、VCO7,分周器8,位相比較器９および、LPF
10によって構成される位相同期回路によって、VCO7の発
振周波数を、第２の基準発振器14の発振周波数が、FIF
±ΔFIF＝|FR〜FLO±ΔFLO|となるように制御する。こ
のときFIF＝FR〜FLOであるから、周波数偏差はΔFIF＝
ΔFLOとなる。In such a configuration, when the transmission radio wave of the base station, that is, the reception radio wave F R is received by the antenna 1, it is amplified by the RF.AMP 11 through the antenna duplexer 2, and is output by the frequency mixer 12 to the output F LO ± ΔF LO of the VCO 7. Mixed with
An intermediate frequency signal F IF = | F R to F LO ± ΔFLO | is obtained. The intermediate frequency signal F IF is amplified by IF.AMP13, the output of which is compared a second frequency F IF ± ΔF IF and phase applied from the reference oscillator 14 in the phase comparator 15, the error voltage output
The signal is fed back to the first reference oscillator in the frequency synthesizer B via the LPF 16, and the VCO 7, the frequency divider 8, the phase comparator 9 and the LPF
The phase locked loop circuit composed of 10, the oscillation frequency of the VCO 7, the oscillation frequency of the second reference oscillator 14 is, F IF
Control is performed so that ± ΔF IF = | F R to F LO ± ΔF LO |. At this time, since F IF = F R to F LO , the frequency deviation becomes ΔF IF =
ΔF LO .
すなわち、周波数シンセサイザＢの出力の周波数偏差
をΔFIFまたはFLOにすることができ、したがって送受信
周波数は高安定なものとなる。That is, the frequency deviation of the output of the frequency synthesizer B can be [Delta] F IF or F LO, thus transmitting and receiving frequency is highly stable ones.
なお、受信信号の変調成分については、LPF16の定数
を適当に選ぶことによって、その悪影響が除去できる。
また、上述の実施例では中間周波信号を直接位相比較し
ているが、中間周波信号を分周して基準発振器出力と位
相比較しても同じ効果が得られることはいうまでもな
い。The adverse effect of the modulation component of the received signal can be eliminated by appropriately selecting the constant of the LPF 16.
In the above embodiment, the intermediate frequency signal is directly compared in phase. However, it is needless to say that the same effect can be obtained by dividing the intermediate frequency signal and comparing the phase with the reference oscillator output.
（発明の効果） 以上、詳細に説明して明らかなように本発明は、基地
局からの送信周波数が高安定であることから、受信周波
数も高安定であることに着目して位相同期回路を構成
し、基準発振器の周波数安定度により高安定にして送受
信周波数を極めて安定にするものであり、基準発振器の
小形化、消費電力の減少化が可能であり、しかも低コス
ト化が容易であるから、実施して移動無線装置の小形
化、低消費電力化、あるいは低コスト化に尽くす効果は
大きい。(Effects of the Invention) As described in detail above, the present invention focuses on the fact that the transmission frequency from the base station is highly stable, so that the reception frequency is also highly stable. It is configured to make the transmission and reception frequency extremely stable by making it highly stable by the frequency stability of the reference oscillator, and it is possible to reduce the size of the reference oscillator, reduce the power consumption, and easily reduce the cost. The effect of reducing the size, reducing the power consumption, or reducing the cost of the mobile wireless device by implementing the method is great.
第１図は本発明の一実施例の構成を示すブロック図、第
２図は従来の移動無線装置を示すブロック図である。 Ａ……送信部、Ｂ……周波数シンセサイザ、 Ｃ……受信部、２……アンテナ共用器、 ３……発振器、4,12……周波数ミキサ、 ５……電力増幅器、６……第１の基準発振器、７……電
圧制御発振器（VCOと略す）、 ８……分周器、9,15……位相比較器、10,16……LPF、11
……高周波増幅器（RF.AMPと略す）、13……中間周波増
幅器（IF.AMPと略す）、14……第２の基準発振器。FIG. 1 is a block diagram showing a configuration of an embodiment of the present invention, and FIG. 2 is a block diagram showing a conventional mobile radio apparatus. A: transmitting section, B: frequency synthesizer, C: receiving section, 2: antenna duplexer, 3: oscillator, 4, 12: frequency mixer, 5: power amplifier, 6: first Reference oscillator, 7: Voltage controlled oscillator (abbreviated as VCO), 8: Divider, 9, 15, Phase comparator, 10, 16, LPF, 11
... high frequency amplifier (abbreviated as RF.AMP), 13 ... intermediate frequency amplifier (abbreviated as IF.AMP), 14 ... second reference oscillator.
フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) H04B 1/38 - 1/58 H04Q 7/00 - 7/38Continuation of the front page (58) Field surveyed (Int.Cl. 6 , DB name) H04B 1/38-1/58 H04Q 7/00-7/38
Claims (1)
搬送周波数信号源が、第１の基準発振器によって周波数
制御される共通の周波数シンセサイザによって供給され
る同時送受信する移動無線装置において、位相比較器と
第２の基準発振器を設け、前記位相比較器により受信部
の中間周波信号と上記第２の基準発振器の出力周波数お
よび位相とを比較し、その誤差電圧出力を低域ろ波器を
経て上記第１の基準発振器に印加し周波数シンセサイザ
の出力周波数を制御することにより、送信周波数偏差を
基地局の送信周波数偏差にほぼ等しくさせることを特徴
とする移動無線装置。1. A mobile radio apparatus for transmitting and receiving simultaneously, wherein a local frequency signal source of a receiving unit and a carrier frequency signal source of a transmitting unit are supplied by a common frequency synthesizer frequency-controlled by a first reference oscillator. And a second reference oscillator. The phase comparator compares the intermediate frequency signal of the receiving section with the output frequency and phase of the second reference oscillator, and outputs the error voltage output through a low-pass filter. A mobile radio apparatus wherein the transmission frequency deviation is made substantially equal to the transmission frequency deviation of the base station by controlling the output frequency of the frequency synthesizer by applying the signal to the first reference oscillator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63022823A JP2796969B2 (en) | 1988-02-04 | 1988-02-04 | Mobile radio equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63022823A JP2796969B2 (en) | 1988-02-04 | 1988-02-04 | Mobile radio equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01200724A JPH01200724A (en) | 1989-08-11 |
| JP2796969B2 true JP2796969B2 (en) | 1998-09-10 |
Family
ID=12093411
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63022823A Expired - Fee Related JP2796969B2 (en) | 1988-02-04 | 1988-02-04 | Mobile radio equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2796969B2 (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58151737A (en) * | 1982-03-05 | 1983-09-09 | Nippon Telegr & Teleph Corp <Ntt> | Interference detecting circuit |
| JPS61195027A (en) * | 1985-02-25 | 1986-08-29 | Matsushita Electric Works Ltd | Transmitter/receiver |
| JPS6326037A (en) * | 1986-07-18 | 1988-02-03 | Nippon Telegr & Teleph Corp <Ntt> | Mobile radio equipment |
| JP2710930B2 (en) * | 1986-11-21 | 1998-02-10 | 三菱電機株式会社 | Double superheterodyne radio |
-
1988
- 1988-02-04 JP JP63022823A patent/JP2796969B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01200724A (en) | 1989-08-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |