CN1090101A - Communicator particularly in wireless communication device to the method for transmission signals modulation - Google Patents
Communicator particularly in wireless communication device to the method for transmission signals modulation Download PDFInfo
- Publication number
- CN1090101A CN1090101A CN 93114095 CN93114095A CN1090101A CN 1090101 A CN1090101 A CN 1090101A CN 93114095 CN93114095 CN 93114095 CN 93114095 A CN93114095 A CN 93114095A CN 1090101 A CN1090101 A CN 1090101A
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- China
- Prior art keywords
- transmission signals
- phase
- signal
- frequency
- modulation
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03C—MODULATION
- H03C3/00—Angle modulation
- H03C3/02—Details
- H03C3/09—Modifications of modulator for regulating the mean frequency
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- Transmitters (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Abstract
Apparatus of the present invention comprise a phase-locked loop, and (rges rgas) can form frequency stability, and utilizes modulation signal (ms) (for example analogue voice signal) can form the modulation to transmission signals wherein to utilize signal.Utilize element (SM, ST) that phase-locked loop is disconnected, can make it be applicable to high governing speed like this, and be applicable to and utilize conditioning signal (MS) that transmission signals (us) is modulated.
Description
In communication equipment, for example with the wireless communication transmitting device that is connected of a communication system, arranging usually has known phase-locked loop to be used for the modulation of transmission signals (for example radio signal) and the frequency stability of transmission signals.
Fig. 1 is selected from magazine " Funkschau " (1977, the 3, the 51-58 page or leaf), and it has illustrated the principle of a phase-locked loop pll.This phase-locked loop is by controlled device RST(voltage controlled oscillator VCO for example), phase discriminator PFD, an adjuster RG(for example is a filter) and an adder AD form.In phase-locked loop pll, on the output of controlled device RST, provide an existing controlled variable RGG, this controlled variable and an instruction parameter FUG make up on phase discriminator PED, are transformed into a regulated quantity STG through adjuster RG.Then, described regulated quantity STG and an interference volume STOG are input on the controlled device device RST in addition on the adder AD.
Principle according to the phase-locked loop of in communication transmitting device, transmission signals being modulated illustrated in fig. 1, make described controlled variable RGG consistent with transmission signals, described instruction parameter FUG is consistent with a reference signal of comparing with described transmission signals, described regulated quantity STG is consistent with regulator output signal, and described interference volume DTOG is consistent with modulation signal.When the preferred voltage controlled oscillator of described controlled device device is realized, the most handy a kind of high stability, the quartz controlled oscillator OZL formation of described reference signal, and, be preferably on the modulator MOD and set up described modulation signal.
Phase-locked loop by such foundation, on the one hand, the frequency of transmission signals can be stablized, on the other hand, described transmission signals can be modulated into modulation signal, for example the audio signal of Mo Ni audio signal or numeral, at this moment, the modulation signal that influences oscillator is through superposeing i.e. addition, the level of formation regulator output signal and modulation signal.
Such phase-locked loop is used for frequency stabilization simultaneously and modulation will have a such precondition to transmission signals, the controlled frequency that is phase-locked loop will be significantly less than modulation signal, it is the frequency of voice signal or digital signal, otherwise, described phase-locked loop will compensate the frequency change that causes through modulation, thereby is impossible to the modulation of transmission signals.Yet most of communication transmitting devices all require high controlled frequency, so that reduce the starting of oscillation speed of phase-locked loop.
From DE3815680(A1) a kind of frequency modulator that is used for cyclical signal is disclosed, it is the form with a kind of regulation loop, is used for vision signal is carried out frequency modulation(FM).In order to draw regulation voltage, during horizontal blanking, a stable reference frequency and a signal frequency that is provided by frequency modulator are compared on videl stage.Described comparison can utilize the clamp circuit of a keying to realize during for example movable line period.Utilize an additional scanning circuit and a holding circuit that connects, controlled voltage value that obtains in black-out intervals is stored the time-continuing process with the line period that is used for an activity, so that this frequency modulator is in the enterprising line trace of frequency (frequency is clamped).
It is a kind of in communicator that basic task of the present invention is to provide, and particularly the transmission signals modulator approach in the cordless communication equipment is utilized this method, and one provides the phase-locked loop that is used for frequency stabilization and modulation to can be used on higher controlled frequency.
Phase-locked loop according to the preamble of the application's claim 1, the technical characterictic of the characteristic by claim 1 can make the above-mentioned task of the present invention be solved.
By the disconnection of phase-locked loop in modulated process and the termination of an adjustment process that causes thus, particularly (under opposite extreme situations, modulation direct voltage) has very high governing speed and the regulating frequency phase-locked loop can be realized when low-frequency modulation signal.
Therefore, owing to planned a kind ofly to remove to influence regulator output signal by the caused means of described disconnection, more preferably one at phase place-frequency discriminator with regulate switch element between the filter, and a control device to be to control the feature operation of described element, and the so above-mentioned requirement about phase-locked loop can realize in a simple manner.Arrangements of components in described phase-locked loop will be based on such prerequisite, promptly from the principle, if the unessential words of the expenditure of economic aspect, consider the output signal of adjuster when transmission signals is modulated, so, in a certain area, in phase-locked loop, may only be fit to adjustable parameter.
This is provided an example, promptly can directly in phase place-frequency discriminator, use as programmable unit to the influential element of regulator output signal.
The description of other its superiority of demonstration provides in the dependent claims.
Fig. 2 has illustrated one embodiment of the present of invention.
Fig. 2 shows a phase-locked loop pll, and it improves from Fig. 1, and it is configured among the communication transmitting device KE.Described communication transmitting device for example is a kind of wireless communication device, and promptly it is to be connected on the unshowned base station by the interval between a radio communication station.The transmission of information, for example analogue voice signal or digital signal are all through being that the modulation of radio signal us forms to transmission signals.
Phase-locked loop pll has a voltage controlled oscillator VCO, and described transmission signals us produces by means of this VCO just.The transmission signals us of Chan Shenging exports from the output terminals A of VCO like this, and is sent on the first input end E1 of phase place-frequency PFD through corresponding a connection.On this phase place-frequency discriminator PFD, carry out frequency or bit comparison mutually from the reference signal rs of second input E2 input with described transmission signals us, and foundation characterizes the error of adjuster input signal rges, described adjuster input signal rges is provided on the output terminals A of phase place-frequency discriminator PFD, and this output terminals A is through a switch element SM and an adjusting filter RF(adjuster) an input E be connected.In described adjusting filter RF, described adjuster input signal rges addition combines in other words, and with at certain time intervals in the corresponding to regulator output signal rgas of employed governing speed set up.Described regulator output signal rgas is provided by the output terminals A of RF, and this output terminals A is connected on the first input end E1 of adder AD.The second input E2 of this adder AD receives the modulation signal ms that is produced by modulator MOD.This signal ms can be voice signal or the digital signal of for example simulating, and it is sent on the base station by communication transmitting device KE.In this adder AD, regulator output signal rgas and modulation signal ms addition, and from output terminals A output, an adjusting input RE who delivers to voltage controlled oscillator VCO modulates on the input in other words conj.or perhaps.This and signal as is through frequency modulation(FM), become a direct current voltage signal, whereby, the frequency of voltage controlled oscillator VCO can change in a given scope, so, can be formed on a kind of modulation of the transmission signals us that sets up among the VCO on the one hand, on the other hand, also can form the adjusting of relevant frequency transmission signal stability.
For the embodiment that continues to discuss, for example be voice signal, the modulation signal ms that perhaps says so exactly is transmitted.In addition, this communicator KE can be by means of for example a kind of microcomputer of a kind of controller ST(of practicality) Be Controlled in a transmitter module.In this case, can make a modulator MOD produce modulation signal ms, and control a kind of like this state of described switch element SM one-tenth, adjuster input signal rges does not promptly reentry on the input E that regulates filter RF.Switch element SM and illustrate by a line by the influence of the modulator MOD of controller ST control.Because this disconnection of phase-locked loop pll, follow-up adjuster input signal rges and regulator output signal rgas are ended in regulating filter RF, that is to say, remain unchanged at the magnitude of voltage of the output terminals A adjusted device output signal rgas that regulates filter RF.Then, described modulation signal ms is added on this constant regulator output signal rgas, and be sent on the adjusting input RE of voltage controlled oscillator VCO, thus, the modulation of transmission signals us is just formed by described modulation signal ms, and the frequency fluctuation of the transmission signals us that causes through modulated process no longer can be regulated by switch element SM based on the disconnection of PLL.The termination of the disconnection of PLL and the adjustment process that causes thus for low frequency (being direct current signal in the extreme case) modulation signal, can realize having the PLL that high governing speed is a regulating frequency especially in modulated process.After modulated transmission signals us sends, by means of controller ST, described switch element SM controls the adjusting input signal rges on the input E that regulates filter RF delivery module once more, therefore, obtained for the frequency stability of the transmission signals us that is set up and necessary adjusting result, and set starting of oscillation process on the frequency at transmission signals.
Claims (5)
1, in communicator, particularly in wireless communication device to the modulator approach of transmission signals, wherein, on a phase-locked loop (PLL), include a phase place-frequency-discriminator (PFD), an adjuster (RF), an adder (AD) and a controlled device (VCO), and reference signal (rs) as the setting of instruction parameter, a modulation signal (ms) and an adjusting output signal (rgas) as the setting of adjustable parameter as the setting of disturbing parameter, it makes the phase place of transmission signals keep it is characterized in that synchronously as adjustable parameter:
In the beginning of the modulation of carrying out transmission signals, described phase-locked loop (PLL) will be disconnected like this, and promptly the regulator output signal in the modulation of transmission signals (us) is sent in the adder (AD) as a constant parameter.
2, according to the method for claim 1, it is characterized in that: phase-locked loop (PLL) is disconnected between phase place-frequency-discriminator (PFD) and adjuster (RF).
3, the device of enforcement of rights requirement 1 or the described method of claim 2 is characterized in that:
On phase-locked loop (PLL), between phase place-frequency-discriminator (PFD) and the adjuster (RF), set up an element (SM), be used for control device (ST) regulator output signal (rgas) and in front is had an effect, control device described here (ST) is controlled the function of described element (SM) according to the moment of the modulation of transmission signals (us), it promptly is connected with element (SM), is connected with a modulator (MOD) again.
4, according to the device of claim 3, it is characterized in that:
Described element (SM) can be a switch element.
5, according to the device of claim 3, it is characterized in that:
Described element (SM) can be a programmable device in phase place-frequency-discriminator (PFD).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP4235923.6 | 1992-10-23 | ||
| DE19924235923 DE4235923A1 (en) | 1992-10-23 | 1992-10-23 | Arrangement for modulating transmission signals in a communication device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1090101A true CN1090101A (en) | 1994-07-27 |
Family
ID=6471248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93114095 Pending CN1090101A (en) | 1992-10-23 | 1993-10-23 | Communicator particularly in wireless communication device to the method for transmission signals modulation |
Country Status (4)
| Country | Link |
|---|---|
| CN (1) | CN1090101A (en) |
| AU (1) | AU5106793A (en) |
| DE (1) | DE4235923A1 (en) |
| WO (1) | WO1994010747A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ATE266274T1 (en) * | 2001-12-07 | 2004-05-15 | Aastra Technologies Ltd | MODULATOR USING A PHASE-LOCKED LOOP AND METHOD THEREOF |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4286237A (en) * | 1979-10-18 | 1981-08-25 | Rca Corporation | Wide range drift compensated FM signal generator |
| JPS5915310A (en) * | 1982-07-17 | 1984-01-26 | Sony Corp | Frequency modulating circuit |
| DE3815680A1 (en) * | 1988-05-07 | 1989-11-16 | Bosch Gmbh Robert | Frequency modulator for periodic signals |
-
1992
- 1992-10-23 DE DE19924235923 patent/DE4235923A1/en not_active Withdrawn
-
1993
- 1993-10-12 WO PCT/DE1993/000962 patent/WO1994010747A1/en active Application Filing
- 1993-10-12 AU AU51067/93A patent/AU5106793A/en not_active Withdrawn
- 1993-10-23 CN CN 93114095 patent/CN1090101A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE4235923A1 (en) | 1994-05-05 |
| WO1994010747A1 (en) | 1994-05-11 |
| AU5106793A (en) | 1994-05-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |