KR20030075381A - Apparatus for Combining and Splitting Diversity Signal - Google Patents

Abstract

PURPOSE: A diversity signal synthesizer/divider is provided to distribute or synthesize each path-classified signal and block speech quality degrading cause such as the noise, loss, and delay of the distributed or synthesized signal. CONSTITUTION: An amplifier(25), a voltage adjustment variable phase shifter(22), and a voltage adjustment variable attenuator(23) are composed in N paths. The amplifier(25) maximally restrains a noise of a signal selected according to each path, and amplifies the level of the signal. The voltage adjustment variable phase shifter(22) adjusts a phase of the amplified signal as an optimum state. The voltage adjustment variable attenuator(23) adjusts the amplified level of the signal as the optimum state. An N-way synthesizing/distributing unit(21) synthesizes the signals inputted through the N paths, and outputs the synthesized signal to one path. The N-way synthesizing/distributing unit(21) distributes a signal inputted through one path to the N paths.

Description

Diversity Signal Synthesis / Splitter {Apparatus for Combining and Splitting Diversity Signal}

The present invention distributes or synthesizes a diversity signal for each path in order to transmit or restore a communication signal by distributing a signal for each path through a plurality of antennas or synthesizing the transmitted signal in a mobile communication system using a diversity scheme. The present invention relates to a diversity signal synthesizing / distributing apparatus in which a component is modularized to enable central control.

Currently, in the mobile communication system, a diversity scheme is used for transmission and reception in order to prevent communication quality deterioration due to various fading occurring in transmission and reception signals.

The diversity scheme is a method of selecting and using a signal having the best characteristics among a plurality of received signals transmitted through two or more independent propagation paths, or synthesizing signals for respective paths to improve reception levels. Here, a method of synthesizing the signals for each path to improve the reception level is called a synthesis method. In order to separate or combine the signals for each path, a combiner / divider is essentially used.

As described above, the synthesis / distributor of the conventional mobile communication system used in the diversity method sums the signals input through N paths from the antennas that receive or transmit the signals for each path, and outputs one path or inputs one path. It is composed of one N-way synthesizer / distributor 10 for distributing and outputting the signal to N paths, and the signal input to N paths or the signal input to one path is output to N paths. Distributed output.

Such a synthesizer / divider causes problems such as loss, phase difference, and delay for each path when separating or synthesizing a signal to a passive element. Since the above problems seriously affect the quality of the mobile communication system, in order to solve this problem, the size of the signal is reduced while maximally suppressing noise on one path input or output to the N-way synthesizer / distributor 10. A low noise amplifier (LNA) 14 for amplifying is installed, and for adjusting optimally the size of a received signal or a signal to be transmitted on N paths input and output to the N-way synthesizer / distributor 10, respectively. A voltage adjusting variable attenuator 11; A voltage adjusting variable phase shifter 12 for adjusting a phase of a transmitted / received signal to an optimal state; Deterioration of the call quality was prevented by using a separate module such as a filter 13 to select a signal of a desired frequency band among the transmitted and received signals or to remove noise other than the signal. At this time, the voltage adjusting variable attenuator 11 and the voltage adjusting variable phase shifter 12 are controlled by a manual control that the mobile communication system operator unilaterally adjusts by hand while looking at the measuring instrument of the system.

However, as described above, a system using a separate module for combining / distributing diversity transmit / receive signals has a problem in that a large number of modules increases the space occupied within the system and as a result, it is difficult to miniaturize the system.

In addition, if the synthesis / distributor and each module is not properly matched, communication quality is reduced, and there is a problem that a loss may occur in the entire system.

In addition, there is a problem that the maintenance is difficult because the synthesis / distributor and each module is difficult to initialize and there are many components.

Accordingly, the present invention provides an N-way synthesizing / distributing unit for distributing diversity transmission / reception signals to N paths or synthesizing signals input to N paths into one path to solve the above-mentioned problems, and the distributed or synthesized signals. By providing components to improve the call quality such as noise, loss, delay of signal, etc. into one module, the size of the system can be reduced by reducing its size, and each component by using one modular synthesizer / distributor The goal is to be able to optimize the matching between them.

In addition, there is no loss by using an active element for each path, improves isolation, and installs a separate control circuit on each path to enable external control manually or automatically. It is another object to facilitate it.

In addition, by using a single module for distributing or synthesizing the diversity transmit and receive signals, another object is to reduce the manufacturing cost of the system and to facilitate maintenance.

In order to achieve the above object, the present invention provides an amplifier (Amp) for amplifying the size of the signal while suppressing the noise of the signal for each path passed through the filter for each path to the signal transmitted and received through the N antennas, and the amplification A voltage adjusting variable phase converter for adjusting the phase of the signal to an optimum state, a voltage adjusting variable attenuator for adjusting the magnitude of the phase-amplified signal to an optimum state, the voltage adjusting variable phase converter and a voltage adjusting variable N paths including a control circuit for controlling the attenuator by receiving an external signal; A diversity signal synthesizer / divider including an N-way synthesis / distributor for synthesizing the signals inputted through the paths and outputting them as one path or distributing the signals input through one path to the N paths. It features.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a block diagram illustrating a synthesis / distributor for distributing or synthesizing a conventional diversity signal and modules for eliminating call quality deterioration factors of the distributed or synthesized signals.

2 is a block diagram illustrating a diversity signal synthesis / divider and a peripheral device according to the present invention.

3 is a block diagram illustrating a diversity signal synthesizer / divider according to the present invention;

<Description of Symbols for Main Parts of Drawings>

10: N-way synthesizer / divider 11,22: Voltage control variable attenuator

12,23: voltage adjustable variable phase shifter

13,26 filter 14 LNA

15,27: antenna 20: synthesis / divider

20: N-way synthesis / divider 24: control circuit

25: amplifier

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

First, FIG. 2 shows a diversity signal synthesizer / splitter 20 and a signal for transmitting a signal distributed for each path in the synthesizer / splitter 20 or synthesizing in the synthesizer / splitter 20. Receiving peripheral devices for receiving, the diversity signal synthesizer / divider 20 according to the present invention, input the received signal for each path of the synthesizer / divider 20 or to transmit the divided signal for each path Consists of filters 26 and antennas 27 on each path. Here, the antennas 27 transmit and receive a diversity signal, and the filter 26 selects a signal of a desired frequency band among signals transmitted and received for each path or removes noise other than the selected signal.

Next, Fig. 3 shows the diversity signal synthesizing / divider of Fig. 2 in detail, wherein the voltage adjusting variable attenuator 22, the voltage adjusting variable phase shifter 23, the amplifier 25, and the voltage adjusting variable attenuator are shown. N paths including a control circuit 24 for controlling the voltage adjusting variable phase shifter 23 and the voltage adjusting variable phase shifter 23 from the outside, and combining the signals received through the paths to output one path or N-way synthesizing / distributing unit 21 for outputting the signals input in the path of the N paths. At this time, the control circuit transmits the state of the voltage regulating variable attenuator and the voltage regulating phase shifter to the central control unit of the mobile communication system. To adjust.

As an example, a synthesis process of diversity signals received through an antenna is described. First, when a signal of a desired frequency band is received through each path through the antenna 27 and the filter 26, the noise is maximized through the amplifier 25. Amplify the signal while suppressing Next, the amplified signal is adjusted to an optimal state through the voltage adjusting variable phase shifter 23, and the signal whose phase is adjusted is optimally sized through the voltage adjusting variable attenuator 22. When the N-way synthesis / distribution unit 21 is input to the N-way synthesis / distribution unit 21, the N-way synthesis / distribution unit 21 synthesizes the signal into one signal and outputs the signal as one path.

The distribution of the signal proceeding in the reverse order of the synthesis distributes the signal input through one path to the N paths through the N-way synthesis / distributor, and divides each of the divided signals with the voltage regulating variable attenuator. A variable phase shifter and an amplifier adjust the magnitude and phase of the signal and output the signal to the antenna.

As described above, the diversity signal synthesizing / distributing apparatus of the present invention distributes or synthesizes the diversity signals transmitted and received by one module to an optimal state without using a separate module to eliminate the deterioration factor of call quality.

Diversity signal synthesizing / distributing apparatus of the present invention includes components for eliminating call quality deterioration factors of a distributed or synthesized signal as a single module including a synthesizing / distributor to reduce the volume and space occupied in a mobile communication system. This maximizes the space utilization in the system.

Also, by placing each component in one module, an optimum matching can be achieved. By using an active element for each path, signal loss can be eliminated and isolation can be improved.

In addition, since the control circuit capable of external control is further installed in the voltage regulating variable phase shifter and the voltage regulating variable attenuator in the synthesizer / divider, the external control is possible, thereby facilitating initialization and repair during installation.

In addition, the use of a single module is easy to maintain and reduce the manufacturing cost of the system.

Claims (3)

In a mobile communication system using a diversity scheme having a filter for selecting a desired frequency band for each path of signals transmitted and received through N antennas, An amplifier (Amp) for amplifying the amplitude of the signal while maximally suppressing the noise of the selected signal for each path, a voltage adjusting variable phase converter for adjusting the phase of the amplified signal to an optimal state, and the phase N paths including a voltage adjusting variable attenuator for adjusting the amplitude of the amplified signal to an optimal state; Diversity signal characterized in that it comprises a N-way synthesis / distribution unit for synthesizing the signal input through the paths to output as one path, or to output the signal input through one path to the N paths Synthesis / Distributor. The method of claim 1, And a control circuit for externally controlling the voltage regulating variable attenuator and the voltage regulating variable phase converter on the respective paths. The method of claim 2, And the control circuit is connected to the central processing unit of the mobile communication system to automatically adjust the states of the voltage regulating variable attenuator and the voltage regulating phase shifter.