KR20000055800A - Phase shifting method and, radio frequency of low power and high power combiner using it in mobile communication system - Google Patents

Abstract

PURPOSE: A method for transiting a phase in a mobile communication system using a code division multiple access(CDMA) system is provided to amplify a radio frequency(RF) signal transmitted from a base station to a mobile station with a high output, and to enable a mixed use of linear power amplifiers(LPAs) having different outputs and control signals. CONSTITUTION: A method for transiting a phase in a mobile communication system comprises the steps of: receiving and confirming a power amplifying value of many linear power amplifiers(LPAs); outputting a predetermined phase transition value corresponding to the confirmed power amplifying value; converting the output phase transition value to an analog signal; and performing phase transition of the wireless frequency signal inputted according to the phase transition value converted to the analog signal.

Description

PHASE SHIFTING METHOD AND, RADIO FREQUENCY OF LOW POWER AND HIGH POWER COMBINER USING IT IN MOBILE COMMUNICATION SYSTEM}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a phase shifting method in a mobile communication system using a code division multiple access (CDMA) scheme and a low power and high power radio frequency synthesizing apparatus using the same, and more particularly, to a radio transmitted from a base station to a mobile station. The present invention relates to a low power and high power radio frequency synthesizer capable of amplifying a radio frequency (RF) signal to a high output and using a combination of a high power linear amplifier (LPA) having different output and control signals. .

1 is a block diagram of a base station of a mobile communication system using a general code division multiple access scheme, and includes a received signal low noise power amplifier 111, frequency downconverters 112 and 113, and a baseband processor 114. ), A sector-specific transmission signal synthesizer 115, frequency up-converters 116 and 117, and a transmission signal high power linear amplifier 118.

2 is a configuration diagram of a radio frequency signal synthesizing apparatus using a conventional high power linear amplifier, which includes a signal distribution unit 211, high power linear amplifiers 212 to 215, a mixing unit 216, and a control unit ( 217).

Here, the high power linear amplifiers 212 to 215 are all 25 Watts.

However, in the case of the conventional radio frequency synthesizer as described above, when operating at a frequency of 5FA or more due to the increase in subscribers, the existing 25W large power amplifier can be mounted up to four per combiner, so up to 100W is possible. In the base station that operates the frequency resources of 5FA or more output, the existing 25W large power linear amplifier can not expect a normal output, there is a problem that the introduction of large power amplifier of 50W or more than 60W class is inevitable.

Accordingly, the present invention has been made to solve the above problems, and is a radio frequency (RF) transmitted from a base station to a mobile station in a mobile communication system using a code division multiple access (CDMA) method. ) Provides a phase correction method that can amplify a signal to a high output and use a combination of a large power linear amplifier (LPA) having different outputs and control signals, and a low power and high power radio frequency synthesizer using the same. The purpose is.

1 is a block diagram of a base station of a mobile communication system using a general code division multiple access scheme.

2 is a block diagram of a radio frequency synthesizing apparatus using a conventional high power linear amplifier.

3 is a diagram illustrating an embodiment of a low power and high power radio frequency synthesizing apparatus in a mobile communication system according to the present invention;

4 is a diagram illustrating an embodiment of the phase shifter of FIG. 3.

5 is a flowchart illustrating a phase correction method in a low power and high power radio frequency signal synthesizing apparatus in a mobile communication system according to the present invention.

Explanation of symbols on the main parts of the drawings

311: Preamplifier 312: Signal Splitter

313 to 316: phase shifter 317 to 320: signal isolator

321 to 324: high power linear amplifier 325: power synthesizer

326: controller

According to an aspect of the present invention, there is provided a radio frequency synthesizing apparatus of low power and high power in a mobile communication system, comprising: signal distribution means for distributing radio frequency signals to be transmitted to a mobile station under control of a control means; A plurality of phase shifting means for shifting the phases of the signals distributed from the signal distribution means under the control of the control means; A plurality of power linear amplifying means for amplifying the power of the signals transmitted from the plurality of phase shifting means; Power synthesizing means for synthesizing power of signals output from the plurality of power linear amplification means; And receiving the output signal of the power synthesizing means to control the signal distributing means, and receiving the output signals of the plurality of power linear amplifying means and distributing signals from the signal distributing means to the phase of the power linear amplifying means. And said control means for controlling said plurality of phase shifting means to coincide with.

In addition, the present invention provides a phase shifting method in a mobile communication system, comprising: a first step of receiving power amplification values of a plurality of power linear amplifiers and confirming power amplification values of the plurality of power linear amplifiers; A second step of outputting a predetermined phase shift value corresponding to the power amplification value identified in the first step; A third step of converting the phase shift value output in the second step into an analog signal; And a fourth step of shifting the phase of the input radio frequency signal according to the phase shift value converted into the analog signal in the third step.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

3 is a configuration diagram of a low power and high power radio frequency signal synthesizing apparatus in a mobile communication system according to the present invention.

As shown in FIG. 3, the low-power and high-power radio frequency signal synthesizing apparatus of the present invention includes a preamplifier 311 for amplifying a radio frequency signal to be transmitted to a mobile station, and a preamplifier under the control of a controller 326. A signal divider 312 for distributing radio frequency signals transmitted from the amplifier 311 and phase shifters 313 to 316 for shifting the phases of the signals distributed from the signal divider 312 under the control of the controller 326. ), High power linear amplifiers 321 to 324 for amplifying the power of signals output from the phase shifters 313 to 316, and phase shifters from the high power linear amplifiers 321 to 324. Signal isolators 317-320 for isolating the transmission of signals to 313-316 and power synthesizers 325 for synthesizing the power of the signals output from the high power linear amplifiers 321-324. Wow In response to the output signal of the power synthesizer 325, the signal divider 312 is controlled, and the output signals of the high power linear amplifiers 321 to 324 are input and the signals distributed from the signal divider 312 are applied to the large power. A controller 326 is provided to control the phase shifters 313 to 316 to match the phase of the linear amplifier.

Here, the powers of the radio frequency signals output from the high power linear amplifiers 321 to 324 are different from each other.

The radio frequency signal is distributed to each of the high power linear amplifiers 321 to 324 of 25W, 50W, 60W or more through the signal distributor 312. At this time, the output signal of the signal divider 312 is a phase shift for each radio frequency signal distributed through the phase shifter (313 to 316) in order to satisfy the phase requirements of the large power linear amplifiers (321 to 324) Perform. This phase shift is specifically performed according to the characteristics of the respective high power linear amplifiers 321 to 324.

In this way, the radio frequency signals subjected to the phase shift are amplified by the large power linear amplifiers, respectively, and the amplified signals satisfy the requirements for the phase characteristics of the power synthesizer 325.

The amplified radio frequency signal is synthesized by the signal synthesizer 325 and output to the mobile station through an antenna.

FIG. 4 is a diagram illustrating an embodiment of the phase shifter of FIG. 3, which includes a D / A converter 411 and a phase shifter 412.

5 is a flowchart illustrating a phase correction method in a low power and high power radio frequency signal synthesizing apparatus in a mobile communication system according to the present invention.

Referring to FIG. 5, the power amplification values of the power linear amplifiers 321 to 324 are received (501), and the power amplification values of the power linear amplifiers 321 to 324 are checked (502).

Then, the phase shift value corresponding to the identified power amplification value is found in the memory in the controller 326 and output (503), the output phase shift value is converted into an analog signal (504), and then the phase shift converted into an analog signal. The phase of the input radio frequency signal is shifted according to the value (505).

Although the technical idea of the present invention has been described in detail according to the above preferred embodiment, it should be noted that the above-described embodiment is for the purpose of description and not of limitation. In addition, those skilled in the art will understand that various embodiments are possible within the scope of the technical idea of the present invention.

As described above, in the present invention, when the FA (Frequency Assignment) increases and the output of the high power linear amplifier is increased, the existing 25W high power linear amplifier can be used. The investment inefficiency of the conventional synthesizer can be improved, thereby reducing the cost.

Claims (3)

In the radio frequency synthesizing apparatus of low power and high power in a mobile communication system, Signal distribution means for distributing radio frequency signals to be transmitted to a mobile station under control of the control means; A plurality of phase shifting means for shifting the phases of the signals distributed from the signal distribution means under the control of the control means; A plurality of power linear amplifying means for amplifying the power of the signals transmitted from the plurality of phase shifting means; Power synthesizing means for synthesizing power of signals output from the plurality of power linear amplification means; And The output signal of the power synthesizing means is controlled to control the signal distribution means, and the signals distributed from the signal distribution means are input to the output signals of the plurality of power linear amplification means, and the phases of the power linear amplification means are applied. Said control means for controlling said plurality of phase shifting means to match. Low and high power radio frequency synthesizing apparatus in a mobile communication system comprising a. The method of claim 1, Pre-amplifying means for amplifying a radio frequency signal to be transmitted to said mobile station and transmitting it to said signal distribution means; And A plurality of signal isolation means for insulating signals from the plurality of high power linear amplification means to the plurality of phase shifting means Low and high power radio frequency synthesizer in the mobile communication system further comprises a In the phase shift method in a mobile communication system, A first step of receiving power amplification values of a plurality of power linear amplifiers and confirming power amplification values of the plurality of power linear amplifiers; A second step of outputting a predetermined phase shift value corresponding to the power amplification value identified in the first step; A third step of converting the phase shift value output in the second step into an analog signal; And A fourth step of shifting the phase of the input radio frequency signal according to the phase shift value converted into the analog signal in the third step Phase shifting method in a mobile communication system comprising a.