JPH0572139B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a mobile radio communication device, and particularly to automatic control of transmission power thereof.

[Prior Art] Fig. 3 is a block diagram showing a portable radio device constituting a mobile radio communication device.
33 is a receiving section (the drawing symbol is RX), 34 is the logic section (the drawing symbol is LOGIC), and 35 is the reference voltage generation circuit (the drawing symbol is LOGIC).
VREF), 36 is a modulation signal input terminal, 37
is the power amplifier (the drawing symbol is PA), 38 is the coupler (the drawing symbol is CPL), 39 is the detector (the drawing symbol is DET), and 40 is the comparator (the drawing symbol is COMP) ), 41 is a controller (the drawing symbol is CONTR), and 42 to 45 are connection terminals.

Mobile radio communication equipment has a station class mark that indicates the class of its nominal transmitting power. Those with a nominal transmitting power of 4 watts are Class I, and those with a nominal transmitting power of 4 watts are Class I, and those with a nominal transmitting power of 4 watts are Class I.
The one with 1.6 watts is Class, and about 4 dB lower.
Those of 0.6 watts are classified into three types. The class to which the station belongs is stored in the logic section 34 as a station class mark code.

The transmission output of this mobile radio communication station is controlled by receiving a transmission output setting control signal from a partner base station. The control signal code of the control signal for setting the transmission output is a 3-bit digital signal, which enters the logic section 34 from the antenna through the duplexer 32 and the receiver section 33, and enters the station class mark stored in the logic section 34. - The transmission output level is determined in relation to the code.

FIG. 2 is a diagram showing the relationship between the transmission output level determined in this way, the station class mark code, and the transmission output setting control signal.
In the figure, the 3-bit control signals are represented by l, m, and n, their logic is represented by H, L, and the station class mark is represented by . The 3-bit signal that controls the reference voltage generation circuit 35 from the logic section 34 is similarly expressed as l, m, and n. Therefore, when the station class mark is , the bit pattern of the control signal for setting the transmission output remains unchanged. It is output to the reference voltage generation circuit 35 (line 4 in Figure 2), and when the station class mark is , "LLL" in the bit pattern of the control signal for transmitting output setting is changed to "LLH" and the reference voltage is It is output to the voltage generation circuit 35 (line 5 in Figure 2), and when the station class mark is , "LLL" and "LLH" in the bit pattern of the control signal for setting the transmission output become "LHL". Modified reference voltage generation circuit 35
(line 6 in Figure 2). However, ⇒ and ⇒ in lines 7 and 8 of FIG. 2 will be explained later. Numbers 1 to 10 indicate levels in 4 dB steps, where 1 indicates 4 watts, 2 indicates 1.6 watts, and so on.

The logic section 34 has transmission levels 1 to 1 shown in FIG.
The reference voltage generation circuit 35 inputs this digital signal and outputs an analog voltage representing the transmission output level, and uses this analog voltage as a reference signal to power the power amplifier 37, coupler 38, and detector. device 39, comparator 40, controller 41,
The transmission output is automatically controlled by the feedback loop of the power amplifying section 37.

The portable radio device shown in FIG. 3 may be used as a mobile radio communication device as is, or it may be used in combination with a booster amplifier as a mobile radio communication device with increased transmission output.

FIG. 4 is a block diagram showing the configuration of a conventional booster amplifier 1. In the figure, 11 is an antenna terminal, 12 is a transmitter/receiver, 13 is a receiving high frequency amplification section (the drawing symbol is AMP), and 14 is a transmitter/receiver. vessel,
15 is a power amplifier, 16 is a coupler, 17 is a detector, 18 is a comparator, 19 is a reference voltage generation circuit for the booster amplifier 1, 20 is a controller, 21 is a high frequency signal input terminal, 22 to 25 are each It is a connection terminal.

FIG. 5 is a block diagram showing the connection between the portable wireless device 3 and the booster amplifier 1 (assuming station class marks). In the figure, the same symbols as in FIGS. 3 and 4 are the same or equivalent. 2 is a portable wireless device cradle.

The connection terminal 42 of the portable wireless device 3 is connected to a booster.
The amplifier 1 is grounded through the connection terminal 22, and this ground signal is sent to the logic section 34 and the reference voltage generation circuit 35.
and control. Since the station class mark of the booster amplifier is , the logic section 34 outputs a digital signal corresponding to line 4 of FIG. 2 under the control of this ground signal.

When the booster amplifier 1 is connected, the station class mark of the portable wireless device 3 is (or), and the power output is 1.6 watts (or It generates a reference voltage that controls the output level in 8 steps, with the output within 0.6 watts being the highest level.

Therefore, in this case, the control of the portable radio device 3 is equivalent to the operation when the digital signal shown in the seventh line or the eighth line of FIG. 2 is output.

On the other hand, the output of the logic section shown in the fourth line of FIG. 2 is applied to the reference voltage generating circuit 19 via terminals 43-45 and 23-25, and is controlled as a class station. Feedback control within booster amplifier 1 is similar to feedback control within portable radio device 3.

[Problems to be Solved by the Invention] Since the conventional device is configured as described above, the portable wireless device 3 has connection terminals 43, 44, 4.
5, which makes it difficult to design a portable wireless device that requires size and weight reduction.

The present invention was made in order to solve the above-mentioned problems in conventional devices, and aims to provide a mobile radio communication device that combines a portable radio device with a booster amplifier and eliminates the obstacles of reducing size and weight. The purpose is

[Means for Solving the Problems] In a mobile radio communication device according to the present invention, a reference voltage for a booster amplifier is generated in a portable radio device, and the generated reference voltage is transmitted from the portable radio device to the booster amplifier. It was decided that the high-frequency power would be transmitted using a high-frequency feed line, and this would be separated within the booster amplifier.

[Operation] In the present invention, a reference voltage for a booster amplifier is generated in a portable radio device, and the generated reference voltage is transmitted from the portable radio device to the booster amplifier.
Since we decided to transmit the high-frequency power to the amplifier using a high-frequency feed line and separate it within the booster amplifier, we decided to use the high-frequency power feed line to transmit the high-frequency power to the amplifier, so we decided to separate it in the booster amplifier. The signal line and its terminal can be omitted.

[Examples] Examples of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the present invention. In the figure, the same reference numerals as in FIGS. 3 to 5 indicate the same or corresponding parts, and 29 is a level discriminator (the drawing symbol is LEVEL); 30 is a reference voltage generation circuit (designated as VREF in the drawing). In addition, C1 and C31 are DC blocking capacitors, C3 and C
32 is a capacitor for high frequency bypass, L1, L3
1 indicates a high frequency blocking inductor.

The configuration of the portable wireless device 3 shown in FIG. 1 is different from the configuration of the portable wireless device 3 shown in FIG.
Since the parts other than 3 to 45 and their wiring are the same as the device shown in FIG. 3, a description of the general operation will be omitted.

If booster amplifier 1 is not connected (if booster amplifier 1 is not connected, the antenna is connected to terminal 31), the station
Depending on whether the class mark is or
A digital signal shown in the fifth or sixth line of FIG. 2 is output, a reference voltage corresponding to this digital signal is output from the reference voltage generation circuit 35, and
The output from 1 is controlled according to the values shown in the 5th or 6th line of FIG. In Figure 2, the number 2
indicates 1.6 watts, and as explained earlier, each increase in the value by 1 reduces the output by 4 dB.

As shown in FIG. 1, when the booster amplifier 1 is connected, an earth signal is applied to the terminal 42, and the logic section 34 outputs the digital signal shown in the fourth line of FIG. 2. In this case, the level of high frequency power from the antenna terminal 31 of the portable wireless device 3 may be any appropriate level.

On the other hand, the reference voltage VREF is sent from the terminal 31 to a coaxial cable (generally a high frequency feed line) in a manner superimposed on the high frequency power. C31 prevents VREF from entering the high frequency part within the portable wireless device 3, and L31 and C32 prevent high frequency power from entering VREF35.

The high frequency power input to the terminal 21 of the booster amplifier 1 is transmitted to the power amplifier 1 via the duplexer 14.
5, VREF enters the level controller 29 via the inductor L1. For C1, VREF is the transmitter/receiver duplexer 1
Prevent it from entering 4. Further, a level discriminator 29 and a reference voltage generation circuit 30 are provided so that the tolerance of VREF generated by the reference voltage generation circuit 35 and transmitted to the booster amplifier 1 can be increased.

FIG. 6 is a connection diagram showing an example of the level discriminator 29 and the reference voltage generation circuit 30 in FIG. 1. The same reference numerals as in FIG. H2b to H8a, H8b are comparators, G2 to G8 are gates, 11 to 18 are inverters, S1 to S8 are switches, RV1 to
RV8 is a variable resistor, B1 to B8, A1 are operational amplifiers, R11 to R20 are fixed resistors, 291, 29
2 and 301 are terminals, respectively.

The output of the inductor L1 input to the terminal 291 is connected to the comparators H1, H2a to H8a, H2b.
-H8b are all input. Corresponding to the 8 levels of VREF, comparators H2a and H2b
and gate G2; comparators H3a, H3b, and gate G3; ... each constitute a window comparator, and one of the eight inverters 11 to 18 is selected according to the eight levels of RREF. The design is such that the output of the inverter becomes L and the corresponding switch is turned on. Therefore, even if the voltage level of the transmitted VREF is not accurate, as long as it is accurate enough not to be confused with an adjacent level, the level discriminator 29 will determine the correct level. Terminal 292 is a stabilized DC voltage input terminal.

B1 to B8 are buffer amplifiers with a gain of 1, and A1
is an adder. To set the gain of adder A1 to 1, for example, R11 to R18 = 100 kΩ, R19 =
100kΩ/(8-1), R20=100kΩ.

For example, if an analog voltage corresponding to level 3 in the fourth row of FIG. 2 is output as VREF, switch S3 in FIG. Output.

Feedback control of the power amplifying section 15 is performed using the reference voltage thus outputted as a reference, as in the conventional device.

"Effects of the Invention" As explained above, the present invention omits the digital signal output terminal of a portable radio device used in combination with a booster amplifier in a mobile radio device.
This has the effect that the portable wireless device can be made smaller and lighter.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a diagram showing the relationship among transmission output setting signals, station class mark codes, and transmission output levels, and FIGS. FIG. 5 is a block diagram showing a conventional device, and FIG. 6 is a connection diagram showing an example of the level discriminator and reference voltage generating circuit of FIG. 1. DESCRIPTION OF SYMBOLS 1... Booster amplifier, 2... Portable radio device pedestal, 3... Portable radio device, 15... Power amplification section, 16... Coupler, 17... Detector, 18...
... Comparator, 20 ... Controller, 29 ... Level discriminator, 30 ... Reference voltage generator, 34 ... Logic section, 35 ... Reference voltage generator, 37 ... Power amplifier section, 38 ... Coupling Instrument, 39...Detector, 40...
Comparator, 41...controller, 42...connection terminal, C
1, C31...DC blocking capacitor, C3, C
32... High frequency bypass capacitor, L1, L
31...High frequency blocking inductor. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A station class mark code representing the class of the nominal transmission output of the own station is stored, and a transmission output setting control signal commanded from the base station and the station class mark code are stored. a logic section that outputs a digital signal representing the transmission output level according to the output voltage, a reference voltage generation circuit that inputs the digital signal output from the logic section and outputs an analog voltage representing the transmission output level, and this reference voltage generation circuit. In a mobile radio communication device having a portable radio device equipped with a feedback control circuit that automatically controls a power amplifying section based on the output of the portable radio device, a booster amplifier is connected to the portable radio device to increase the transmission output. In this case, the voltage is determined by the station class mark of the booster amplifier and the transmission output setting control signal, which is provided in the logic section and the reference voltage generation circuit, and detects the connection of the booster amplifier. means for outputting an analog voltage representing a transmission output level as a reference voltage; means for superimposing and transmitting the reference voltage on a high-frequency feed line that transmits the high-frequency voltage from the power amplifying section of the portable wireless device to the booster amplifier; , means provided in the booster amplifier for separating the reference voltage and the high frequency power; and means for feedback controlling the power amplification section of the booster amplifier using the separated reference voltage as a reference. A mobile radio communication device characterized by: