KR100264971B1 - Mobile communication channel composition method and system thereof - Google Patents

Abstract

PURPOSE: A device for constructing a mobile communication channel is provided to differently construct a pilot channel and a communication channel for a high communication channel and a low communication channel. CONSTITUTION: At least one modulator for a high communication(25a-25n) modulates high speed signals used for private pilot channels. At least one modulator for a low communication(23a-23n) modulates low speed signals used for common pilot channels. A modulator for the common pilot channels(21) modulates the signals of the common pilot channels. A synthesizer(27) synthesizes the signals received from the at least one modulator for a high communication(25a-25n), the at least one modulator for a low communication(23a-23n) and the modulator for the common pilot channels(21), and outputs the synthesized signals. A high frequency power amplifier(29) performs a power amplification for the received signals from the synthesizer(27). An antenna(31) receives the signals from the high frequency power amplifier(29), and emits the received signal.

Description

Method and apparatus for configuring a mobile communication channel

The present invention relates to a method and apparatus for configuring a mobile communication channel, and in particular, to a mobile communication system including a plurality of radio base stations and a plurality of mobile stations communicating with the radio base station, to configure a radio channel used for communication between the radio base station and the mobile station. It relates to a channel configuration method and apparatus for mobile communication.

Currently, mobile communication systems such as mobile phones or automobile phones divide and service the entire service area into relatively small wireless zones called cells, which is called a cellular method. Such a system is constructed as shown in FIG.

1 is a configuration diagram of a mobile communication system.

The service area is divided into small wireless zones on a cell basis, and a plurality of wireless base stations 111 covering the divided wireless zones and a plurality of mobile stations 112 communicating with the wireless base stations through a wireless channel are provided.

In a mobile communication system, voice signals and data are transmitted between radio base stations and mobile stations through radio channels. In the mobile communication system, there is a problem in that radio transmission has a problem that radio wave loss fluctuates greatly with the movement of the mobile station and transmission reliability is poor in an area where the reception level is greatly reduced. As a technique for solving the above problems and increasing the reliability, various methods such as error correction technology or transmission control have been developed and put into practical use. There are various techniques for improving transmission reliability such as radio wave propagation or error correction in mobile communication, but the detailed description thereof will be omitted.

There is a method using a pilot signal as a technique for increasing the reliability of wireless transmission and enabling high quality transmission or large capacity in mobile communication. It is a technique of transmitting a signal pattern already known on the transmitting side, that is, a pilot signal, and demodulating the information signal with high reliability using the demodulation result of the pilot signal. Larger systems are based on the assumption that pilot signals are used to accurately synchronize received signals, to accurately estimate the characteristics of transmission paths between transmitters and receivers, to improve transmission reliability and to provide the same quality services at the same frequency bandwidth. Can be built.

However, in a system in which a plurality of mobile stations, such as a public mobile communication system, share a radio base station, two methods may be considered as a method of configuring a channel for supplying a pilot signal (hereinafter referred to as a pilot channel). One is to supply a common pilot channel to a plurality of mobile stations, and the other is to supply a separate pilot channel to a plurality of mobile stations. That is, the pilot channel is classified into a method of constructing a pilot channel using a spreading code of a frequency channel separate from the communication channel, and a method of constructing a pilot channel by time division multiplexing using a spreading code of the same frequency channel as the communication channel.

2, 3, and 4 diagrammatically illustrate the channel configuration method as described above.

2 illustrates an example of a pilot channel method according to the related art, in which a common pilot channel is used for a plurality of mobile stations.

3 illustrates an example of a pilot channel configuration method according to the related art, in which a separate channel is used for a communication channel and a separate pilot channel is used for each mobile station.

4 illustrates an example of a pilot channel configuration method according to the prior art, in which a channel identical to a communication channel is time-divided and used as a pilot channel, but using a separate pilot channel for each mobile station.

Comparing the characteristics of the common pilot channel and the individual pilot channel, the use of the common pilot channel basically has the advantage of higher synchronization accuracy and greater capacity by efficiently using radio resources.

In order to realize a high efficiency system having a large capacity in the mobile communication system as described above, not only the wireless transmission technology described so far but also various technologies unique to the cellular system are required. As one of such techniques, an adaptive array antenna may be applied to a wireless base station.

The adaptive array antenna is a synthesis of signals received from a plurality of antennas and is an adaptive control technique of antenna directivity. By using an adaptive array antenna, directivity control can be performed, for example, to have a high gain for the desired wave direction and a low gain for the mobile station direction causing the interference wave. In this way, interference interference from the interfering station can be suppressed to the minimum, and the desired wave can be received at the maximum intensity, thereby providing a large capacity mobile communication system having high quality.

5 is a conceptual diagram illustrating a method of avoiding interference using an adaptive array antenna.

In the case where two mobile stations exist, mutual interference is avoided by adaptively controlling antenna directivity for each mobile station. In the figure, when two mobile stations of the mobile station A and the mobile station B exist in a radio zone covering one base station, the transmission to the mobile station A is strong in the direction of the mobile station A, like the directivity indicated by the solid line, Weak transmission in the direction of mobile station B reduces interference. Also in the transmission to the mobile station B, interference is reduced by making it strong in the direction of the mobile station B and weakly in the direction of the mobile station A as in the directivity indicated by the dotted line. In the figure, a system in which a plurality of mobile stations share the same frequency channel, such as a code division multiple access (CDMA) scheme, is exemplified, but a frequency division multiple access (FDMA) scheme or the like. Other multiple access schemes, such as Time Division Multiple Access (TDMA) schemes, can avoid interference from the same frequency channel that is used repeatedly geographically and have the same effect.

Recently, various communication systems including mobile communication have diversified user's demands, and according to the development of transmission technology, various transmission speeds are used in the same communication service. For example, ISDN (Integrated Services Digital Network), which provides a variety of services, is based on a transfer rate of 64kbits / s and provides high-speed transfer rates of 128kbits / s and 384kbits / s. In mobile communication, for example, as a Japanese digital mobile communication service, PDC (Personal Digital Cellular) provides 9600bps data communication in addition to voice communication, and 288kbps packet communication is applied. Anger is underway.

In general, when information transmission speed is high, radio resources such as many frequency channels or high transmission power are required. Therefore, since a service having a high transmission rate and a service having a low transmission rate are mixed, there is a problem in that capacity and efficiency are reduced. Mobile communication also has a limited frequency band, which is particularly important. In order to efficiently provide various services in such a mobile communication system, it is very important to apply the cell-specific technology described above, in particular, an adaptive array antenna in a wireless base station. Increasing the capacity to reduce mutual interference of communication using the same frequency channel can efficiently provide a high speed transmission service.

In the case of applying an adaptive array antenna to remove interference in a mobile communication system that performs communication between a radio base station and a mobile station using a communication channel and a pilot channel in parallel, the following serious drawbacks exist. In other words, the adaptive array antenna reduces the gain of the antenna with respect to the interference wave and controls the signals transmitted to a plurality of mobile stations communicating at the same time so that they do not overlap each other. Therefore, there is a drawback in principle that a common pilot channel cannot be used which is excellent in terms of capacity and synchronization accuracy.

In contrast, the use of individual pilots can provide a pilot signal to each mobile station, but it has the drawback of compromising capacity due to complex device configuration and useless power.

In addition, an interference cancellation device such as an adaptive array antenna requires the same number of antennas as the number of interference mobile stations to be removed (the number of removed interference mobile stations + 1), but it is currently shared by one radio base station for dozens or hundreds of mobile stations. When applied to a mobile communication system, the cost of the base station equipment is considerably higher, so there is a significant disadvantage of low economic feasibility.

The present invention devised to solve the above problems, the mobile communication system having a plurality of radio base stations and a plurality of mobile stations to properly configure the configuration of the pilot channel and the communication channel for the high-speed communication channel and the low-speed communication channel The purpose of the present invention is to provide a method and apparatus for configuring a mobile communication channel capable of constructing a high quality and large capacity mobile communication system and efficiently providing various services.

1 is a configuration diagram of a mobile communication system.

2 is a conceptual diagram illustrating a case where a common pilot channel is used for a plurality of mobile stations as an example of a pilot channel configuration method according to the prior art.

3 is a conceptual diagram illustrating an example of a pilot channel configuration method according to the prior art, in which a pilot channel separate from a communication channel is used and a separate pilot channel is used for each mobile station.

FIG. 4 is a conceptual diagram illustrating a pilot channel configuration method according to the prior art, in which the same channel as the communication channel is time-divided and used as a pilot channel, but using a separate pilot channel for each mobile station.

5 is a conceptual diagram illustrating a method of avoiding interference using an adaptive array antenna.

6 is a block diagram illustrating a mobile communication channel configuration method according to an embodiment of the present invention.

7 is a block diagram of a mobile communication channel configuration apparatus according to an embodiment of the present invention.

FIG. 8 is a detailed diagram of one embodiment of a high speed communication modulation circuit used in the mobile communication channel arrangement of FIG.

9 is a block diagram of a mobile communication channel configuration apparatus according to another embodiment of the present invention.

10 is a block diagram of a mobile communication channel configuration apparatus according to another embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

21: Modulation Circuit for Common Pilot Channel

23a-23n: Modulation circuit for low speed communication using common pilot channel

25a-25n: Modulation circuit for high speed communication using individual pilot channel

27: synthesizer 29: high frequency power amplifier

33,39,47: Diffusion code generator 35,41,49: Diffusion modulator

37, 43: encoder 45: multiplexer

In order to achieve the above object, the present invention provides a method for configuring a mobile communication channel of a mobile communication system having a plurality of radio base stations and a plurality of mobile stations communicating with the plurality of radio base stations using a pilot channel and a communication channel. In the high speed communication channel, each communication channel uses a separate pilot channel, and the low speed communication channel uses a plurality of communication channels using a common pilot channel.

In addition, the present invention provides a mobile communication channel configuration method of a mobile communication system comprising a plurality of wireless base stations and mobile stations communicating with the wireless base station, in order to achieve the above object, the high-speed communication is a base station individually in each communication channel The antenna uses a channel in which the directivity of the antenna is controlled, and the low speed communication uses a channel in which the directivity of the base station antenna is controlled in common in a plurality of communication channels.

In addition, in order to achieve the above object, the present invention provides a channel configuration method of a mobile communication system having a plurality of radio base stations and a mobile station communicating with the radio base station using a pilot channel and a separately assigned communication channel, The high speed communication channel uses each pilot channel individually, and the low speed communication channel uses a common pilot channel commonly used by multiple communication channels. In the low-speed communication, a plurality of communication channels commonly use a channel in which the directivity of the base station antenna is controlled.

In addition, the present invention provides a mobile communication system comprising a plurality of radio base stations and mobile stations communicating with the radio base stations using a pilot channel and a separately assigned communication channel, each pilot channel. At least one modulation means for high-speed communication for modulating a high-speed signal using a; At least one modulation means for low speed communication for modulating a low speed signal using a common pilot channel; Modulating means for a common pilot channel for modulating a common pilot channel signal; Synthesizing means for receiving a signal from the high speed communication modulation means, the low speed communication modulation means, and the common pilot channel modulation means, and synthesizing and outputting a signal; High frequency power amplifying means for power amplifying a signal received from the synthesizing means; And an antenna for receiving and radiating a signal from the high frequency power amplifying means.

In addition, the present invention provides a mobile communication system comprising a plurality of radio base stations and mobile stations communicating with the radio base stations using a pilot channel and a separately assigned communication channel, each pilot channel. At least one modulation means for high-speed communication for modulating a high-speed signal using a; At least one modulation means for low speed communication for modulating a low speed signal using a common pilot channel; First synthesizing means for synthesizing a signal output from the modulation means for low speed communication; At least one first high frequency power amplifying means for amplifying and outputting a signal output from the high speed communication modulation means; Second high frequency power amplifying means for amplifying and outputting a signal output from the low speed communication modulation means; At least one first phase shifting means for phase shifting the signal output from the first high frequency power amplifying means to have a predetermined directivity; At least one second phase shifting means for phase shifting the signal output from the first high frequency power amplifying means to have a predetermined directivity; At least one second synthesizing means for synthesizing a signal having the same phase shift among the signals output from the first and second phase shift means; And at least one antenna for radiating a signal output from the second combining means.

In addition, the present invention provides a mobile communication system comprising a plurality of radio base stations and mobile stations communicating with the radio base stations using a pilot channel and a separately assigned communication channel, each pilot channel. At least one modulation means for high-speed communication for modulating a high-speed signal using a; At least one modulation means for low speed communication for modulating a low speed signal using a common pilot channel; First synthesizing means for synthesizing a signal output from the modulation means for low speed communication; At least one first high frequency power amplifying means for amplifying and outputting a signal output from the high speed communication modulation means; Second high frequency power amplifying means for amplifying and outputting a signal output from the low speed communication modulation means; At least one first phase shifting means for phase shifting the signal output from the first high frequency power amplifying means to have a predetermined directivity; At least one second phase shifting means for phase shifting the signal output from the first high frequency power amplifying means to have a predetermined directivity; At least one second synthesizing means for synthesizing a signal having the same phase shift among the signals output from the first and second phase shift means; And at least one antenna for radiating a signal output from the second combining means.

In addition, the present invention provides a mobile communication system comprising a plurality of radio base stations and mobile stations communicating with the radio base stations using a pilot channel and a separately assigned communication channel, each pilot channel. At least one modulation means for high-speed communication for modulating a high-speed signal using a; At least one modulation means for low speed communication for modulating a low speed signal using a common pilot channel; Modulating means for a common pilot channel for modulating a common pilot channel signal; First synthesizing means for synthesizing a signal output from the modulation means for the common pilot channel and the modulation means for the low speed communication; At least one first high frequency power amplifying means for amplifying and outputting a signal output from the high speed communication modulation means; Second high frequency power amplifying means for amplifying and outputting a signal output from the low speed communication modulation means; At least one first phase shifting means for phase shifting the signal output from the first high frequency power amplifying means to have a predetermined directivity; At least one second phase shifting means for phase shifting the signal output from the first high frequency power amplifying means to have a predetermined directivity; At least one second synthesizing means for synthesizing a signal having the same phase shift among the signals output from the first and second phase shift means; And at least one antenna for radiating a signal output from the second combining means.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to FIGS. 6 to 10.

6 is a block diagram illustrating a mobile communication channel configuration method according to an embodiment of the present invention.

This figure shows a case where the radio base station 11 and the mobile stations A, B, and C (12, 13, 14) communicate. This example shows a case where the mobile stations A and B 12, 13 perform low speed transmission, and the mobile station C 14 performs high speed transmission. There is a separate pilot channel for slow transmission of mobile stations A and B (12, 13), which is used as a common pilot channel. Mobile station C 14, which performs high-speed transmission, uses a separate pilot channel.

That is, this figure shows an example in which a common pilot channel is configured according to a time division multiple access method, but this is not limited only to the embodiment of the present invention, and individual pilots are performed using separate frequency channels or spreading codes. You may comprise a channel.

7 is a block diagram of a mobile communication channel configuration apparatus according to another embodiment of the present invention.

A common pilot channel modulation circuit 21 for spread modulation of a common pilot signal in a radio base station, a low speed communication modulation circuit 23a-23n for spread modulation of a low speed communication user data using a common pilot channel, The output from the high speed communication modulation circuit 25a-25n for spread modulation of the high speed communication pilot signal and the user data using separate pilot channels is synthesized in the synthesizer 27 and then amplified in the high frequency power amplifier 29. And radiated from the antenna 31.

In the common pilot channel modulation circuit 21, a fixed value or a fixed pattern is used as data to be modulated, and the spread modulator 35 uses a spreading code commonly used by a low-speed communication user output from the spreading code generator 33. Diffusion modulation.

In the low speed communication modulation circuits 23a to 23n, data from a low speed communication user is converted into an error correcting code or a bit interleave in the encoder 37, and to each spreading code output from the spreading code generator 39. As a result, diffusion modulation is performed in the diffusion modulator 41.

In the high-speed communication modulation circuit 25a-25n, data from a high-speed user is multiplexed in the pilot signal and the multiplexer 45 after spreading, for example, error correction encoding or bit interleaving in the encoder 43, and spreads for each circuit. The spreading modulator 47 is spread-modulated according to each spreading code output from the code generator 47.

FIG. 8 is a detailed diagram of an embodiment of a high speed communication modulation circuit used in the mobile communication channel configuration device of FIG.

FIG. 7 illustrates a case in which individual pilot channels used for high speed communication are multiplexed according to time division. However, when individual pilots are configured using channels configured by separate spreading codes, a spread modulation circuit for high speed communication ( It is preferable to use 51a-51n in Fig. 8). That is, each of the modulation circuits 51a to 51n includes spreading code generators 53 and 55 corresponding to the user data and the pilot signal, respectively, and the user data and the pilot signal are spread through separate channels. In 59). Of course, using either the multiplexing by time division shown in FIG. 7 or the multiplexing method using separate channels shown in FIG. 8, the adaptation effect of the present invention is distinguished, but equivalent effects can be obtained.

Next, a channel configuration method for antenna directivity control will be described.

9 is a block diagram of a mobile communication channel configuration apparatus according to another embodiment of the present invention.

In the drawing, N (where N is a natural number) low speed communication modulation circuits 61a-61n for spreading modulation of low speed communication user data, and two high speed communication modulation circuits 63 for spreading modulation of high speed communication user data are shown. The case where 65) is provided is shown. In low speed communication, the outputs of the plurality of low speed communication modulation circuits 61a to 61n are synthesized by the synthesizer 67 and then amplified by the high frequency power amplifier 69, and configured to correspond to three antennas 87-89 to be transmitted. The phase is changed in the phase shifter 75-77 and transmitted through the synthesizer 84-86 and the antenna 87-89.

In the high-speed communication, in the ideal phaser 78-83 corresponding to three antennas 87-89 which are individually amplified in the high frequency power amplifiers 71 and 73 and separately configured in the modulation circuits 63 and 65 for high-speed communication, respectively. Phase change and transmitted via synthesizer 84-86 and antenna 87-89.

In Fig. 9, power amplification is performed in the power amplifiers 69-73, and phases are changed in the phase shifters 75-83. This configuration uses a high frequency power amplifier (69-73) corresponding to each antenna and takes the form of synthesizing the signal after changing the phase from each circuit, but configured to perform power amplification just before radiating through the antenna. You may also

The directivity of the antenna is determined according to the phase change caused by the phase shifter, and the most characteristic of the present invention is to use the common phase shifter for a plurality of low speed communication modulation circuits 61a to 61n to have the same directivity, and to modulate the high speed communications. The circuits 63 and 65 use their respective phase shifters to have individual directivity.

10 is a block diagram of a mobile communication channel configuration apparatus according to another embodiment of the present invention.

The radio base station shown in this figure combines the common pilot signals from the common pilot channel modulation circuit 90 and synthesizes them in the synthesizer 67 when synthesizing the outputs of the multiple low speed communication modulation circuits 61a-61n. The difference is different from that of FIG.

Although the present embodiment has been described under the assumption of a code division multiple access (CDMA) scheme, the present invention is not limited thereto. Multiple access methods include frequency multiple access (FDMA) or time division multiple access (TDMA) in addition to CDMA, and any of them can be applied and the same effect can be obtained.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes are possible in the art without departing from the technical spirit of the present invention. It will be clear to those of ordinary knowledge.

As described above, in the present invention, a high speed communication channel uses an individual pilot channel corresponding to each communication channel, and a low speed communication channel uses a common pilot channel commonly used by a plurality of communication channels. Even when the interference cancellation method that avoids mutual interference is applied, the high speed communication can be configured by using a separate pilot channel, so that interference between high speed communication and low speed communication can be avoided and a high quality and large capacity mobile communication system can be provided. It has an effect. The low speed communication uses a common pilot channel which is advantageous in terms of capacity and synchronization accuracy, thereby achieving high quality and providing a large capacity mobile communication system.

In the present invention, the high-speed communication uses a channel in which the directivity of the base station antenna is controlled in correspondence with each communication channel, and the low-speed communication uses a channel in which the directivity of the base station antenna is controlled in common for a plurality of communication channels. Although there is little interference between the low speed communication and the low speed communication, the interference between the high speed communication can be avoided, while the low speed communication can be configured to use a common directional pattern to provide a high quality and high capacity mobile communication system without complicating the system. It works. In addition, the transmission power required for high speed communication can be controlled less, and the mobile station having only a small transmission power can receive the high speed transmission service.

In the present invention, the high speed communication channel uses a separate pilot channel corresponding to each communication channel, and the low speed communication channel uses a common pilot channel commonly used by a plurality of communication channels. By controlling the directivity of the individual base station antennas corresponding to the low speed communication and controlling the directivity of the base station antennas in common to a plurality of communication channels, it is possible to provide a mobile communication system having a large capacity and a good quality.

Claims (14)

A method of configuring a mobile communication channel in a mobile communication system, comprising a plurality of radio base stations and a plurality of mobile stations communicating with the plurality of radio base stations using a pilot channel and a communication channel, The high speed communication channel is characterized in that each communication channel uses a separate pilot channel, and the low speed communication channel is a plurality of communication channels using a common pilot channel. The method of claim 1, And the high speed communication channel uses time division multiple access (TDMA) of the communication channel and the pilot channel. The method of claim 1, And the high speed communication channel uses frequency division multiple access (FDMA) for the communication channel and the pilot channel. The method of claim 1, And the high speed communication channel uses the communication channel and the pilot channel by code division multiple access (CDMA). A mobile communication channel configuration method of a mobile communication system comprising a plurality of radio base stations and mobile stations communicating with the radio base stations, High speed communication uses a channel in which the directivity of the base station antenna is controlled in each communication channel, and low speed communication uses a channel in which the directivity of the base station antenna is controlled in common in a plurality of communication channels. Configuration method. A channel configuration method of a mobile communication system having a plurality of radio base stations and mobile stations communicating with the radio base stations using a pilot channel and a communication channel allocated individually, The high speed communication channel uses a pilot channel for each communication channel individually, and the low speed communication channel uses a common pilot channel commonly used by multiple communication channels. High-speed communication uses a channel in which the directivity of the base station antenna is controlled by each communication channel individually, and low-speed communication uses a channel in which the directivity of the base station antenna is controlled in common by a plurality of communication channels. Configuration method. An apparatus for configuring a mobile communication channel in a mobile communication system having a plurality of radio base stations and a mobile station communicating with the radio base station using a pilot channel and a communication channel allocated individually, At least one modulation means for high speed communication for modulating a high speed signal using a separate pilot channel; At least one modulation means for low speed communication for modulating a low speed signal using a common pilot channel; Modulating means for a common pilot channel for modulating a common pilot channel signal; Synthesizing means for receiving a signal from the high speed communication modulation means, the low speed communication modulation means, and the common pilot channel modulation means, and synthesizing and outputting a signal; High frequency power amplifying means for power amplifying a signal received from the synthesizing means; And Antenna for receiving and radiating a signal from the high frequency power amplifying means Mobile communication channel configuration device comprising a. The method of claim 7, wherein The high speed communication modulation means, Encoding means for encoding user data; Multiplexing means for multiplexing the pilot user signal and the encoded user data output from the encoding means; Spreading code generating means; And Spreading modulation means for spreading modulation of the signal output from the multiplexing means using the spreading code output from the spreading code generating means Mobile communication channel configuration device comprising a. The method of claim 7, wherein The high speed communication modulation means, First spreading code generating means; Second spreading code generating means; Encoding means for encoding user data; First spreading modulation means for spreading modulating the signal output from the encoding means by using the spreading code output from the first spreading code generating means; And Second spreading modulation means for spreading modulation of the pilot channel signal using a spreading code output from the second spreading code generating means Mobile communication channel configuration device comprising a. The method of claim 7, wherein The modulation means for low speed communication, Encoding means for encoding user data; Spreading code generating means; And Spreading modulation means for spreading modulation of the signal output from the encoding means by using the spreading code output from the spreading code generating means Mobile communication channel configuration device comprising a. The method of claim 7, wherein The modulation means for the common pilot channel, Spreading code generating means; And Spreading modulation means for spreading modulation of a predetermined signal using spreading codes output from the spreading code generating means Mobile communication channel configuration device comprising a. An apparatus for configuring a mobile communication channel in a mobile communication system having a plurality of radio base stations and a mobile station communicating with the radio base station using a pilot channel and a communication channel allocated individually, At least one modulation means for high speed communication for modulating a high speed signal using a separate pilot channel; At least one modulation means for low speed communication for modulating a low speed signal using a common pilot channel; First synthesizing means for synthesizing a signal output from the modulation means for low speed communication; At least one first high frequency power amplifying means for amplifying and outputting a signal output from the high speed communication modulation means; Second high frequency power amplifying means for amplifying and outputting a signal output from the low speed communication modulation means; At least one first phase shifting means for phase shifting the signal output from the first high frequency power amplifying means to have a predetermined directivity; At least one second phase shifting means for phase shifting the signal output from the first high frequency power amplifying means to have a predetermined directivity; At least one second synthesizing means for synthesizing a signal having the same phase shift among the signals output from the first and second phase shift means; And At least one antenna for radiating a signal output from said second combining means Mobile communication channel configuration device comprising a. An apparatus for configuring a mobile communication channel in a mobile communication system having a plurality of radio base stations and a mobile station communicating with the radio base station using a pilot channel and a communication channel allocated individually, At least one modulation means for high speed communication for modulating a high speed signal using a separate pilot channel; At least one modulation means for low speed communication for modulating a low speed signal using a common pilot channel; First synthesizing means for synthesizing a signal output from the modulation means for low speed communication; At least one first high frequency power amplifying means for amplifying and outputting a signal output from the high speed communication modulation means; Second high frequency power amplifying means for amplifying and outputting a signal output from the low speed communication modulation means; At least one first phase shifting means for phase shifting the signal output from the first high frequency power amplifying means to have a predetermined directivity; At least one second phase shifting means for phase shifting the signal output from the first high frequency power amplifying means to have a predetermined directivity; At least one second synthesizing means for synthesizing a signal having the same phase shift among the signals output from the first and second phase shift means; And At least one antenna for radiating a signal output from said second combining means Mobile communication channel configuration device comprising a. An apparatus for configuring a mobile communication channel in a mobile communication system having a plurality of radio base stations and a mobile station communicating with the radio base station using a pilot channel and a communication channel allocated individually, At least one modulation means for high speed communication for modulating a high speed signal using a separate pilot channel; At least one modulation means for low speed communication for modulating a low speed signal using a common pilot channel; Modulating means for a common pilot channel for modulating a common pilot channel signal; First synthesizing means for synthesizing a signal output from the modulation means for the common pilot channel and the modulation means for the low speed communication; At least one first high frequency power amplifying means for amplifying and outputting a signal output from the high speed communication modulation means; Second high frequency power amplifying means for amplifying and outputting a signal output from the low speed communication modulation means; At least one first phase shifting means for phase shifting the signal output from the first high frequency power amplifying means to have a predetermined directivity; At least one second phase shifting means for phase shifting the signal output from the first high frequency power amplifying means to have a predetermined directivity; At least one second synthesizing means for synthesizing a signal having the same phase shift among the signals output from the first and second phase shift means; And At least one antenna for radiating a signal output from said second combining means Mobile communication channel configuration device comprising a.