JPH02117225A - Mobile radio communication equipment - Google Patents

Abstract

PURPOSE:To attain the miniaturization and light weight of a device and to eliminate the need for a digital signal output terminal by detecting the level of a high frequency power inputted from a portable radio equipment to a booster amplifier, and controlling the power amplifier part of the booster amplifier by the high frequency power. CONSTITUTION:The booster amplifier 1 inputs high frequency output from the terminal 31 of the portable radio equipment 3 from a terminal 21, and supplies a prescribed allocation part from a coupler 26 to a reception high frequency amplifier part 27, and amplification by a prescribed gain is performed at the part, and it is detected by a detector 28, and the level of the output is discriminated by a level discriminator 29, and generates a reference voltage at a reference voltage generation circuit 30 according to a discriminated level, and performs the feedback control of the power amplifier part 15 setting the voltage as reference. Since the level of the high frequency power inputted from the portable radio equipment to the booster amplifier is detected and the power amplifier part is controlled for the reference voltage generated from the level, it is possible to eliminate a signal line to transmit a digital signal from the logic part of the radio equipment and its terminal, which attains the miniaturization and the light weight of the device.

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. In the figure, (31) is an antenna terminal, and (32) is a duplexer (the drawing symbol is DUP). ,
(33) is the receiving section (the drawing symbol is RX), (34) is the logic section (the drawing symbol is LOGIC), (35)
is the reference voltage generation circuit (the drawing symbol is VREF),
(36) is a modulation signal input terminal, (37) is a power amplification section (
(The drawing symbol is PA), (38> is the coupler (the drawing symbol is CPL), (39) is the detector (the drawing symbol is DET), (40) is the comparator (the drawing symbol is CO
MP), (41) is the controller (drawing symbol is C0N
TR) and (42) to (45) are connection terminals.

A mobile radio communications device is marked with a station class mark that indicates the class of its nominal transmit power.
ss mark) with a nominal transmitting power of 4 watts is C1ass I, which is about 4 dB lower than that of 1.6
It is classified into three types: C1ass II, which is about 4 dB lower, and C1ass m, which is about 4 dB lower and has 0.6 watts. The class to which your station belongs is determined by the logic section (34) as the station class mark code.
is stored in

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 for the control signal for setting the transmission output consists of a 3-bit digital signal, and is transmitted from the antenna to the transmitter/receiver (32).
, and enters the logic section (34) via the reception section (33), and the transmission output level is determined in relation to the station class mark code stored in the logic section (34).

Figure 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. , its logic is represented by H, L, and the station class mark is represented by I, II, I[l. Similarly, the 3-bit signal from the logic section (34) that controls the reference voltage generation circuit (35) is also sent to 12. Therefore, when the station class mark is ■, the bit pattern of the transmission output setting control signal is output as is to the reference voltage generation circuit 35) (line 4 in Figure 2), and the station class mark is When the class mark is H, rLLLJ in the bit pattern of the transmission output setting control signal is changed to rLLHJ and output to the reference voltage generation circuit (35) (line 5 in Fig. 2). When the mark is ■, it is rLL in the bit pattern of the control signal for setting the transmission output.
L, and rLLH.

are changed to r L and HL J and output to the reference voltage generation circuit (35) (6th line in FIG. 2). However, 1lai and [laJ in lines 7 and 8 of FIG. 2 will be explained later. Numbers 1 to 10 indicate levels in 4 dB steps,
1 indicates 4 watts, 2 indicates 1.6 watts, etc.

The logic section (34) outputs digital signals representing transmission levels 1 to 8 shown in FIG.
) inputs this digital signal and outputs an analog voltage representing the transmission output level, and uses this analog voltage as a reference signal to operate the power amplifier (37), coupler (38), and detector (
39), the transmission output is automatically controlled by feedback loops of the comparator (40), the controller (41), and the power amplifier (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.

Figure 4 is a block diagram showing the configuration of a conventional booster amplifier (1), in which (11) is an antenna terminal;
2) is the transmitter/receiver duplexer, (13) is the reception high frequency amplification unit (the drawing symbol is AMP), (14) is the transmitter/receiver duplexer, (1
5) is a power amplifier, (16) is a coupler, (17) is a detector, (18) is a comparator, and (19) is a booster amplifier (
1) Reference voltage generation circuit, (20) controller, (21)
are high frequency signal input terminals, and (22) to (25) are connection terminals, respectively.

Figure 5 shows a portable wireless device (3) and a booster amplifier (1).
) (assuming the station class mark is 1). In the figure, the same symbols as in Figures 3 and 4 indicate the same or equivalent parts, and (2) is a portable radio device. It is a pedestal.

The connection terminal (42) of the portable wireless device M (3) is connected to the booster
It is grounded through the connection terminal (22) of the amplifier (1), and this ground signal is sent to the logic section (34) and the reference voltage generation circuit (3).
5) control. Booster amplifier station
Since the class mark is ■, the logic section (34) outputs a digital signal corresponding to the fourth line in FIG. 2 by controlling this earth signal.

When the booster amplifier 1) is connected, corresponding to the station class mark of the portable wireless device (3) being ■ (or ■), each bit pattern of the control signal for setting the transmission output is A reference voltage is generated to control the output level in eight steps, with the output within 1.6 watts (or 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 line 7 or line 8 of FIG. 2 is output.

On the other hand, the output of the logic section shown in the fourth row of FIG.
43) to <45) and (23) to (25) to the reference voltage generation circuit (19), and is controlled as a class ■ station. Feedback control within the booster amplifier (1) is based on the portable type This is similar to the feedback control within the wireless device W(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), (45).
), which poses the problem of making 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] A mobile radio communication device according to the present invention detects the level of high-frequency power input from a portable radio device to a booster amplifier, and adjusts the booster amplifier to a reference voltage generated from this level. - It was decided to control the power amplification section of the amplifier.

[Function] In the present invention, the level of high frequency power input to the booster amplifier from the portable wireless device is detected, and the power amplification section of the booster amplifier is controlled with respect to the reference voltage generated from this level. Therefore, the signal line and its terminal for transmitting the digital signal from the logic section of the portable wireless device to the booster amplifier can be eliminated.

[Examples] Examples of the present invention will be described below with reference to the drawings. 1st
The figure 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 (26) is a coupler (the drawing symbol is CPL);
(27) is the receiving high frequency amplification section (the drawing symbol is AMP), (28) is the detector (the drawing symbol is DET), and (29) is the level discriminator (the drawing symbol is LEVEL).
), <30) is a reference voltage generation circuit (the drawing symbol is V
REF).

The configuration of the portable wireless device <3) in FIG. 11 is different from the configuration of the portable wireless device (3) shown in FIG.
) to (45) and the parts other than the wiring thereof are the same as the device shown in FIG. 3, so a description of the general operation will be omitted.

If booster amplifier (1) is not connected, please contact terminal (31) if booster amplifier (1) is not connected.
), station class
Depending on whether the mark is ■ or ■, the digital signal shown in the 5th or 6th line of FIG.
), and the output from the terminal (31) is controlled according to the numerical values shown in the fifth or sixth line of FIG. In FIG. 2, the number 2 indicates 1.6 watts, and as explained above, each time the number increases by 1, the output decreases by 4 dB.

As shown in Figure 1, when the booster amplifier (1) is connected, an earth signal is given to the terminal (42), and the logic section (34) outputs the digital signal shown in the fourth row of Figure 2. The reference signal generation circuit (35) attenuates the voltage corresponding to the input digital signal and controls the output of the portable wireless device (3) to be within its nominal transmission output at its highest level. That is, the reference voltage generation circuit (35
) corresponds to the digital signals shown in lines 7 to 8 of FIG. 2, and the high frequency power output to the terminal (31) is feedback-controlled based on this reference voltage. That is, the power level of the high frequency power output to the terminal (31) has eight levels of output in 4 dB increments, with the highest output determined by the station class mark of the portable radio device (3) being the highest value.

The booster amplifier (1) connects this high frequency power to the terminal (21
), a predetermined proportion of the input is given to the reception high frequency amplification section (27) from the coupler (26), where it is amplified by a predetermined gain, which is detected by the detector (28), and the level of the output is determined. A level discriminator (29) makes a determination, a reference voltage generating circuit (30) generates a reference voltage according to the determined level, and the power amplifying section (15) is feedback-controlled using this voltage as a reference.

Figure 6 is a connection diagram showing an example of the level discriminator (29) and reference voltage generation circuit (30) in Figure 1, where the same symbols as in Figure 1 indicate the same parts, and R1-R9 are fixed resistors. , CI,
C2a, C2b to C8a, C8b are comparators, 62 to G8 are gates, 11 to I8 are inverters, 81 to S8 are switches, Rv1 to Rv8 are variable resistors,
Bl~B8. AI is an operational amplifier, R11 to R20 are fixed resistors, (2'91), (292), (301')
are terminals, respectively.

Detection output V of the detector (28) input to the terminal (291)
D2 is the comparator C1, C2a to C8a, C2
It is input to all of b to C8b. Corresponding to the fact that the power level of the terminal (21) is in 8 stages, the level of VD2 is also in 8 stages. Comparators C2a, C2b and gate G
2; Comparators C3a, C3b and gate G3;...
・They each constitute a window comparator, and inverters 11 to 11 correspond to the 8 levels of VD2.
It is designed so that the output of any one of the eight inverters of I8 becomes L, and the corresponding switch is turned on. Therefore, even if the power level of the high-frequency signal input to the terminal (21) is not accurate, as long as it is accurate enough not to be confused with the adjacent level, the level discriminator (29)
) determines the exact level.

Terminal (292) is an input terminal for a stabilized DC voltage.

81 to B8 are buffer amplifiers with a gain of 1, and A1 is an adder. To make the gain of adder A1 1, for example, R1
1~R18=100Ω, R19=lOOkΩ/(8
-1), Ω may be set to R20=100.

For example, the station class mark of the portable wireless device (3) before connecting the booster amplifier is ■, and the transmission output setting signal from the base station is j=L, m=H,
Assuming that n=I, the power level of the terminal (21) is controlled to a level corresponding to the value 6 on the 8th line of FIG. The highest level of this class is number 3, so number 6
is a level three steps below the numerical value 3, so only the output 64 in Figure 6 is turned on, and switch S4 is turned on (all other switches are turned off), ! ! The output of the amplifier B4 is outputted from a terminal (301) as a reference voltage VREF1. At this time, VREF 1 is set to have an output corresponding to the numerical value 4 in FIG. 2. Similarly, when the transmission output setting signal is β = L, m = L, n = H, the power level of the terminal (21) corresponds to the number 4, and the output of the terminal (301) corresponds to the level 2. becomes.

Feedback control of the power amplifying section (15) is performed based on the reference voltage outputted in this manner as in the conventional device.

"Effects of the Invention" As explained above, the present invention makes it possible to reduce the size and weight of a mobile radio device by eliminating the digital signal output terminal of the portable radio device used in combination with a booster amplifier. There is an effect that it can be done.

[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 FIG.
Figures 4 and 5 are block diagrams showing conventional devices;
The figure is a connection diagram showing an example of the level discriminator and reference voltage generating circuit of FIG. 1. (1)... Booster amplifier, (2)... Portable radio device cradle, (3)... Portable radio device, (15)...
...Power amplification section, (16)...Coupler, (17)...
・Detector, (18)...Comparator, (20)...Controller, (26)...Coupler, (28)...Detector, (
29) Level discriminator, (30) Reference voltage generator, (34) Logic unit, (35) Reference voltage generator, (37) Power amplifier unit, (38)...
・Coupler, (39)...Detector, (40)...Comparator, (41)...Controller, (42)...Connection terminal. In addition, the same reference numerals in each figure indicate the same or corresponding parts.
Antenna terminal 42; Earth doubler terminal 43, 44, 45
: 7-” Inotaruiha is terminal 36 : Hen 1 pasting goods 5-
No. 2 (W-child Figure 3 Booster Anno 0 L-----1-----Jll: Antenna terminal 21゛High frequency signal terminal j°1; Child 23, 24, 25° Dinotal signal terminal Figure 4

Claims (1)

[Claims] A station class mark code representing the class of the nominal transmission power of the own station is stored, and the station class mark code is combined with a transmission power setting control signal commanded from the base station. Therefore, there is a logic section that outputs a digital signal representing the transmission output level, a reference voltage generation circuit that inputs the digital signal output from this logic section and outputs an analog voltage representing the transmission output level, and a reference voltage generation circuit that outputs an analog voltage representing the transmission output level. In a mobile radio communication device having a portable radio device equipped with a feedback control circuit that automatically controls a power amplification section based on the output, when a booster amplifier is connected to the portable radio device to increase the transmission output. , provided in the logic section and the reference voltage generation circuit,
means for detecting the connection of a booster amplifier and changing the circuit connection to output an analog voltage representing a number of stages of transmit power level defined by the nominal transmit power of the booster amplifier; , a level discriminator that extracts and detects a part of the high frequency power input from the portable wireless device using a coupler with a predetermined coupling coefficient, and determines the power level of the input high frequency power from the detected output; this level discriminator A reference voltage generation circuit within the booster amplifier that generates an analog voltage representing the transmission output level of the booster amplifier according to the power level determined by the booster amplifier, and automatically adjusts the transmission output of the booster amplifier based on the output of this reference voltage generation circuit. A mobile radio communication device characterized by comprising: means for controlling.