KR20000051464A - Multi-band multi-carrier transmission apparatus in multi-sectored microcellular system - Google Patents

Abstract

PURPOSE: A multi-range multi-carrier transceiver for a multiplex sector micro cellular system is provided to uplift a frequency response by using a surface acoustic wave filter to improve quality of signal. CONSTITUTION: A multi-range multi-carrier transceiver for a multiplex sector micro cellular system comprises the parts of: a forward sender, which converts radio frequency into intermediate frequency, and synthesizes synchronous standard frequency and control signal and transmits them; a forward receiver, which converts the intermediate frequency, having transmitted to forward direction, through a primary DNC(Down Converter), filters it by a SAW(surface acoustic wave) filter, converts it through a secondary UPC(Up Converter), and outputs it; a backward sender, which converts radio frequency of diversity signal and primary signal, having received by antenna, through a primary UPC, filters them by the SAW, converts them through a secondary UPC, and transmits them after synthesizing with frequency of control signal; a backward receiver, which converts the primary frequency and the diversity intermediate frequency through a UPC.

Description

MULTI-BAND MULTI-CARRIER TRANSMISSION APPARATUS IN MULTI-SECTORED MICROCELLULAR SYSTEM}

The present invention relates to a multiband multicarrier transmission apparatus in a microcellular system, and more particularly, to a microcellular multisector mobile communication based on a subcarrier multiplexing (SCM) transmission method using a hybrid fiber radio network. The present invention relates to a transmission apparatus capable of transmitting and receiving a synchronization signal, a control signal, and a CDMA signal with high quality between each small base station (mBS) miniaturized in a system and a base station.

In the conventional base station system, a frequency of up and down is synchronized using a 10 MHz signal received through a primary and spare GPS (Global Position System) receiver. Meanwhile, in the conventional mobile communication system, the base station is miniaturized as the cell is microcelled, and the asynchronous method is also sought due to the limitation of the installation of the GPS antenna due to the miniaturization of the base station. However, a synchronization scheme for a small base station is essential because a code division multiple access (CDMA) mobile communication system is based on synchronization. On the other hand, when a small base station is configured in an asynchronous manner, there is a difficulty in flexible soft handoff processing, and the performance of the system also depends on its performance.

In order to overcome this problem, by using the optical transmission network to transmit the reference frequency and time synchronization information from the central to the remote small base station, a method for improving the capacity and performance of the entire system while maintaining the miniaturization and synchronization method of the base station is proposed. However, the conventional system has a problem that the transmission of the reference frequency is not easy. On the other hand, a structure for directly transmitting radio frequency (RF) directly to each small base station without transmitting a reference frequency has been proposed, but this has to implement a system in the form of point-to-point, and there is a problem in that a system cost is high. .

Alternatively, the wavelength division multiplexing (WDM) method may be used for point-to-multipoint, but it requires multiple light sources for optical transmission, and in each small base station It should be set to the wavelength of the corresponding light source, its adjustment is virtually difficult, and should be used only in a definite form, there are many problems to use in the state that the technical difficulties in the current method of transmitting multiple light sources are not solved.

As a method for the diversity structure used in the CDMA system, the method of directly transmitting the current radio frequency (RF) may use a wavelength division multiplexing (WDM) method on the receiving side, or may be configured by reinstalling a new optical path. . As another method, since there is no transmission of the reference frequency, there is a method of separating the primary signal and the diversity signal by using the oscillation signal to down the radio frequency (RF) signal. That is, the extreme method is to transmit the main signal directly at radio frequency (RF) and the diversity signal at intermediate frequency (IF). In this case, although the received signal is asynchronous in the diversity signal, the coherency is broken at the small base station and again at the base station, resulting in a double signal quality degradation.

In addition, in the method of directly transmitting at a radio frequency (RF), since all signals coming from adjacent bands are optically transmitted, a coupling phenomenon generated in light cannot be solved, and thus, other analog signal bands and wireless data signals are not transmitted. The quality of the signal is degraded by the influence of.

Accordingly, the present invention devised to solve the above problems of the prior art by distributing the frequency synchronization signal to the miniaturized cell, surface acoustic wave (SAW) filter in a multi-sector mobile communication system based on the synchronous CDMA method The multi-sector microcellular system improves the quality of the transmitted signal by improving the quality of the transmitted signal, improves the quality of the signal, expands coverage and capacity, and uses frequency resources efficiently and improves the quality of service. It is an object of the present invention to provide a multiband multicarrier transmission apparatus in a system.

1 is a first schematic illustration of a transmission apparatus of a microcellular system to which the present invention is applied.

Figure 2 is a schematic second exemplary view of a transmission apparatus of a microcellular system to which the present invention is applied.

Figure 3a is a detailed block diagram of a forward transmission unit installed in a conventional base station according to the present invention.

Figure 3b is a detailed configuration of the reverse receiver installed in the conventional base station according to the present invention.

Figure 4a is a detailed configuration of the forward receiving unit of the small base station according to the present invention.

4B is a detailed block diagram of a reverse transmission unit of a small base station according to the present invention;

* Explanation of symbols for the main parts of the drawings

101: central base station controller (mBSC) 102,203: small base station (mBS)

103,202: optical transmission network connection 105,207: digital unit (DU)

106: transmission unit (TU) 107: maintenance unit (MU)

108,205: subcarrier conversion unit (SCMU) 201: base station

204: UP converter (UPC)

206: down converter (DNC: DowN Converter)

208: Microcell Control Board (MCB)

The present invention for achieving the above object, in a multi-band multi-carrier transmission apparatus in a multi-sector micro-cellular system, receives the radio frequency of the existing base station and converts to the intermediate frequency band assigned to each sector, GPS receiver Forward transmission means for synthesizing and transmitting the synchronization reference frequency generated by using a signal, a control signal for controlling each small base station, and an intermediate frequency signal for each sector; A synchronization reference frequency, a control signal, and an intermediate frequency are separated from the signal transmitted from the forward transmission means, and the intermediate frequency is first down-converted, then filtered using a surface acoustic wave filter, and the filtered signal is secondary. Forward receiving means for down-converting the output; First, the radio frequency of the diversity and the main signal received through the antenna is first downconverted, and then filtered using the surface acoustic wave filter, respectively, and the second filtered signal is secondarily upstream to an intermediate frequency band allocated thereto. Reverse transmission means for converting and transmitting the frequency synthesized together with the control signal; And receiving an intermediate frequency signal and a control signal from the signal received through the reverse transmission means, and converting the main signal and the diversity signal into radio frequency signals for each sector, respectively, and transmitting them to the radio frequency terminal of the existing base station. A means is provided.

According to the present invention, since the band of the transmitted signal is an intermediate frequency (IF) band, all the problems caused by the direct transmission of radio frequency (RF) can be solved, and by transmitting the reference frequency from the center, the coherency of the signal is also existing base station. It can be guaranteed the same as the system, and also improves the performance of the overall system by eliminating analog radio frequency signals or radio data signals using surface acoustic wave (SAW) filters.

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

1 is a schematic first exemplary diagram of a transmission apparatus of a microcellular system to which the present invention is applied, in which 101 is a central base station controller (mBSC), 102 is a small base station (mBS), 103 is an optical transmission network connection, and A GPS antenna, 105 represents a digital unit (DU), 106 represents a transmission unit (TU), 107 represents a maintenance unit (MU), and 108 represents a subcarrier modulation unit (SCMU).

In a microcellular system, a radio base (RF) front-end and a compound optical transmission matching module are placed in a small base station (mBS) 102 in a conventional base station, and a part and a controller corresponding to a digital module are controlled by a central base station controller. (mBSC) 101 to perform centralized control management and dynamic channel allocation.

The transmitting unit 106 of the central base station controller transmits and receives an intermediate frequency (IF) of the CDMA signal, and the received intermediate frequency (IF) signal includes a primary and diversity signal. The digital unit (DU) 105 receives a reference frequency tone of 10 MHz from a GPS antenna and provides the generated 10 MHz reference frequency tone to a subcarrier conversion unit (SCMU) 108. Further, control data for controlling the small base station (mBS) 102 is transmitted and received with the maintenance unit (MU) 107.

The maintenance unit (MU) 107 matches the digital unit 105 to frequency control signals for network management, state management of a small base station (mBS), control of a small base station, downloading programs and databases, and gain control. Transmit and receive with the subcarrier conversion unit 108 through a frequency shift keying (FSK) modulation and demodulation scheme.

The subcarrier conversion unit 108 synthesizes the CDMA transmission / reception signal, the reference frequency signal and the control signals generated using the reference frequency tone, and transmits the signal through the optical transmission network, and transmits the CDMA signal and the control signal from the signal received through the optical transmission network. Separately, provided to the transfer unit 106 and the maintenance unit 107, respectively.

FIG. 2 is a schematic second exemplary diagram of a transmission apparatus of a microcellular system to which the present invention is applied, which shows an example of an implementation of the transmission apparatus in the case of using the currently installed base station system (BTS) 201 as it is.

In the case of the forward transmission, the subcarrier conversion unit 205 receives the output of the up converter (UPC) 204 or receives the signal output from the directional coupler of the linear power amplifier (LPA) output stage. After converting to IF (Intermediate Frequency), it is converted into an optical signal and transmitted to each small base station (203). At this time, a reference frequency of 10 MHz or a converted signal and a control signal thereof are frequency synthesized with the CDMA intermediate frequency signal and transmitted to each small base station (mBS) 203.

Referring to the case of the reverse transmission, the signal transmitted from each small base station (mBS) 203 through the transmission network at the intermediate frequency of the main signal and the diversity signal is received by the subcarrier conversion unit 205, the subcarrier conversion unit 205 In other words, the main signal and the diversity signal transmitted in different intermediate frequency bands are up-converted to the original radio frequency (RF) signal and provided to the down converter 206 of the base station. The digital unit 207 provides a reference frequency tone received through the GPS antenna and transmits and receives various control signals with the microcell control board 208. The microcell control board 208 transmits and receives a control signal for controlling the remote small base station through the subcarrier conversion unit 205.

3A is a configuration diagram of a forward transmitter installed in a conventional base station for converting a radio frequency (RF) transmission signal output from a base station system according to the present invention into a desired band and transmitting it to each small base station (mBS). Variable attenuator, 302, 306 is an amplifier, 303 is a mixer, 304 is a local oscillator (LO), 305 is a bandpass filter, 307 is a reference frequency generator, 308 is a modem, 309 is a frequency synthesizer, 310 is An all-optical converter is shown, respectively.

A function unit for converting a radio frequency received from an existing base station into an intermediate frequency corresponds to each sector, and is provided by the number of sectors, and is converted into a different intermediate frequency band for each sector. The function unit for converting a radio frequency into an intermediate frequency includes a variable attenuator 301, a first amplifier 302, a local oscillator 304, a frequency mixer 303, a bandpass filter 305, and a second amplifier 306. do.

The variable attenuator 301 is a part necessary for setting the desired signal level in each transmission structure according to the strength of the input signal, which is adjusted by adjusting the level of the RF signal input from the upconverter of the existing base station. 1 is supplied to the amplifier 302.

The first amplifier 302 amplifies the output signal of the variable attenuator 301 set to an appropriate level and provides it to the mixer 303. The mixer 303 mixes the output of the first amplifier 302 with the output of the local oscillator 304 and converts it to the desired intermediate frequency band. The bandpass filter 305 is for filtering only the intermediate frequency band allocated to each sector, which serves to suppress unwanted frequencies generated by the local oscillator 304. The second amplifier 306 amplifies and outputs the output of the bandpass filter 305 again. The reference frequency generator 307 generates a synchronization reference frequency signal for providing to each small base station by using the reference frequency of 10 MHz received through the GPS receiver. The modem 308 is connected to the processor to perform a function of demodulating and demodulating the control signal.

The frequency synthesizer 309 frequency synthesizes the intermediate frequency signal generated for each sector, the reference frequency signal generated by the reference frequency generator, and the control signal to output one signal. The pre / optical converter 310 converts the output of the frequency synthesizer 309 into an optical signal and transmits it to each small base station through the optical transmission network.

An important part of such a forward transmitter is in a frequency converter consisting of a variable attenuator 301, a local oscillator 304 and a frequency mixer 303. This allows the signal level to be adjusted in each transmission structure and can be arbitrarily varied to the assigned frequency band.

3b is a configuration diagram of a reverse receiver installed in an uplink existing base station converting an intermediate frequency signal received from each small base station according to the present invention into an original radio frequency signal and inputting it to a down converter of an existing base station system. Opto-electric converter, 321 is power divider, 322 is modem, 323 is power divider, 324-1, 324-2, 328-1, 328-2 is bandpass filter, 325-1, 325-2, 329-1 329-2 denotes an amplifier, 326-1 and 326-2 denote local oscillators, 327-1 and 327-2 denote frequency mixers, and 330-1 and 330-2 denote variable attenuators.

The reverse receiver according to the present invention also has a frequency conversion function corresponding to each sector, and each frequency conversion function is provided with two reception paths having the same configuration for the main signal and the diversity signal.

The signal transmitted from each small base station through the optical fiber is converted into an electrical signal by the opto-electric converter 320, and the electrical signal is divided into a plurality of signals by the power splitter 321 to provide a frequency conversion function for each sector. And the modem 322. The modem 322 extracts and demodulates a control signal among the signals distributed by the power divider 321 and supplies the demodulated signal to the processor. Here, a low noise amplifier (LNA) may be provided at the rear end of the photoelectric converter 320.

The signal input to the frequency conversion module for each sector is divided into a main signal and a diversity signal by the power divider 323 and input to the band pass filters 324-1 and 324-2 of each band. The signals input to the band pass filters 324-1 and 324-2 are first filtered and then first amplified by the respective amplifiers 325-1 and 325-2. Each local oscillator 326-1, 326-2 generates an oscillation signal, and each frequency mixer 327-1, 327-2 is coupled with the output of each local oscillator 326-1, 326-2. The outputs of the respective amplifiers 325-1 and 325-2 are mixed to convert the intermediate frequency signal into a radio frequency signal. Each bandpass filter 328-1, 328-2 filters the output of each of the frequency mixers 327-1, 327-2 to each desired radio frequency band, and each filtered signal is subjected to a respective amplifier ( 329-1, 329-2). The outputs of the respective amplifiers 329-1 and 329-2 are adjusted by the variable attenuators 330-1 and 330-2 to adjust the signal level input to the down converter of the existing base station.

4A is a configuration diagram of a forward receiving unit of a small base station according to the present invention, in which 401 is an opto-electric converter, 402 is a frequency divider, 403 and 414 are variable attenuators, 404, 408, and 412 are amplifiers, 405 and 409 The power divider 406 and 410 represent a local oscillator LO, 407 a surface acoustic wave filter, 411 and 413 a bandpass filter, 415 a reference frequency recoverer and 416 a modem.

The optical signal including the reference frequency, the control signal, and the CDMA signal is converted into an electrical signal by the optical / electric converter 401 and distributed through the power divider 402. The reference frequency recoverer 415 restores the phase of the reference frequency signal distributed through the power divider 402 and provides the reference frequency of each frequency synthesizer. The modem 416 demodulates the control signal and supplies it to the processor. The CDMA signal distributed by the power divider 402 is input to the amplifier 404 after its signal level is adjusted by the variable attenuator 403 to limit the spurious and intermodulation characteristics according to the signal strength. The amplifier 404 amplifies the input signal and supplies it to the frequency mixer 405 of the primary frequency converter. The frequency mixer 405 mixes the oscillation signal of the local oscillator 406 and outputs the first frequency conversion. In the first frequency converted signal, only the upconverted signal of a desired band is filtered by the surface acoustic wave filter 407. Here, the band of the filter may be changed according to the service band provided and determined according to the band allocated per operator. For example, for the service of SK Telecom 4MHz band, the surface acoustic wave filter band is a filter of a band that accommodates CDMA three FA (Frequency Assignment). Since the surface acoustic wave filter has a good skirt characteristic, the surface acoustic wave filter suppresses a signal of an adjacent band and filters only the selected band. This improves the spurious and intermodulation characteristics of the signal and completely eliminates signals in adjacent bands. Since the signal passing through the surface acoustic wave filter 407 is severely attenuated, it is amplified and output through the amplifier 408. The output of the amplifier 408 is again mixed with the output of the local oscillator 410 by the frequency mixer 409 to be second frequency converted. The output of the frequency mixer 409 is an upconverted frequency of the 4MHz band of the existing CDMA signal. Here, the output of the frequency mixer can be freely converted, so that the signal can be transmitted in all bands of the actual CDMA. In this case, the filter of the last stage should be changed to a filter that can accommodate all bands. The bandpass filter 411 serves to suppress the output of the frequency mixer 409, and the signal passing through the bandpass filter 411 is amplified by the amplifier 412. In addition, the band pass filter 413 removes out-of-band spurious generated in the adjacent band and the entire band, and is caused by other components of the input signal of the high power amplifier (HPA) or the linear power amplifier (LPA). This prevents the output from fluttering. The variable attenuator 414 adjusts the level of the signal filtered by the bandpass filter 413 to adjust the level of the signal input to the high power amplifier (HPA) or the linear power amplifier (LPA). The bandpass filter 411 can accommodate the entire 25MHz band of the CDMA, but the bandpass filter 413 only accommodates the serviced band.

5 is a block diagram of a reverse transmission unit of a small base station according to the present invention.

The main and diversity signals received from the antenna are amplified by the low noise amplifiers 503 and 504 after filtering through the receive cavity filters 501 and 502. The frequency mixers 505 and 507 synthesize the amplified signals with the oscillation signals of the local oscillators 506 and 508, respectively, and frequency convert the signals into bands of the surface acoustic wave filters 509 and 510. Since the surface acoustic wave filter has excellent skirt characteristics, the surface acoustic wave filter serves to suppress most of signals of other components received in the adjacent band, for example, the frequency of the frequency common communication band and the frequency of the analog mobile telephone band. By employing this, it is possible to satisfy the criteria of single tone insensitivity and intermodulation restriction in the interworking test item of the base station. The attenuated signals are filtered by the respective surface acoustic wave filters 509 and 510 and amplified by the respective amplifiers 511 and 512.

The signals amplified by the amplifiers 511 and 512 are again mixed with the oscillation signals of the local oscillators 514 and 516 in the frequency mixers 513 and 515 and downconverted to the intermediate frequency band of the desired small base station. In the reception band, the bands of the main signal and the diversity signal are separated from each other. This second frequency converted signal is suppressed out-of-band spurious through each band pass filter (517, 518), the output of each band pass filter (517, 518) variable attenuator (519, 520) in order to convert to an appropriate level of optical signal ), The output level is adjusted. The outputs of the variable attenuators 519 and 520 are amplified by the respective amplifiers 521 and 522. The frequency synthesizer 523 synthesizes the main signal amplified by the respective amplifiers 521 and 522 and the diversity intermediate frequency signal and the control signal modulated by the modem, and the pre / optical converter 525 converts the frequency synthesized electrical signal. The signal is converted into an optical signal and transmitted to an existing base station through an optical transmission path.

On the other hand, in the present invention, when using the 11MHz band, the reception cavity filter is used, and then a bandpass filter is added, and the band can be transmitted to a desired band by frequency converting, which is the same as that of the intermediate frequency band. The same concept can be processed, and services for the PCS band can be processed in the same manner.

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

According to the present invention as described above, in the multi-band multi-carrier forward transmission, the surface acoustic wave filter is used to improve the spurious and intermodulation characteristics, so that the band received from the small base station can be selected with excellent selectivity. Adjacent channel selectivity is greatly improved, resulting in an increased dynamic range of the signal, resulting in improved signal quality, increased coverage, and increased subscribers.

Claims (13)

A multiband multicarrier transmission apparatus in a multisector microcellular system, It receives the radio frequency of the existing base station and converts it into an intermediate frequency band allocated to each sector, and generates a synchronization reference frequency generated using a signal of a GPS receiver, a control signal for controlling each small base station, and the intermediate for each sector. Forward transmission means for synthesizing and transmitting a frequency signal; A synchronization reference frequency, a control signal, and an intermediate frequency are separated from the signal transmitted from the forward transmission means, and the intermediate frequency is first downconverted, then filtered using a surface acoustic wave filter, and the filtered signal is applied to itself. Forward receiving means for down-converting the secondary frequency to the allocated frequency band and outputting the second frequency; Firstly upconvert the diversity and the radio frequency of the main signal received through the antenna, and then filter each using the surface acoustic wave filter, and filter each of the filtered signals into a secondary frequency band assigned to itself. Uplink transmission means for upconverting, frequency synthesis together with a control signal, and transmitting the result; And Reverse receiving means for separating the intermediate frequency signal and the control signal from the signal received through the reverse transmission means, and up-converts the main signal and the diversity signal to the radio frequency signal for each sector and transmits them to the radio frequency terminal of the existing base station. Multiband multicarrier transmission apparatus in a multi-sector microcellular system having a. The method of claim 1, The forward transmission means, First frequency conversion means corresponding to each sector for adjusting a level of a signal input from a radio frequency terminal of an existing base station and converting the signal into an intermediate frequency band allocated thereto; Reference frequency generating means for generating a reference frequency for synchronization of each of the small base stations using the signal of the GPS receiver; First modulation means for modulating a control signal for controlling the small base station; And A first power synthesizing means for synthesizing the output of the first frequency converting means for each sector, the output of the reference frequency generating means, and the output of the first modulating means and transmitting them through a transmission path; Multi-band multi-carrier transmission device in a multi-sector micro-cellular system comprising a. The method of claim 2, First pre / optical conversion means for converting the output of the first power synthesizing means into an optical signal and transmitting the optical signal through an optical path; Multi-band multi-carrier transmitter in a multi-sector micro-cellular system characterized in that it further comprises. The method of claim 2 or 3, The first frequency conversion means, A first variable attenuator for adjusting a level of an input radio frequency signal; A first amplifier for amplifying the output of the first variable attenuator; A first frequency converter for converting the output of the first amplifier to a set intermediate frequency band; A first bandpass filter for bandpass filtering the output of the first frequency synthesizer; And A second amplifier amplifying the output of the first bandpass filter Multi-band multi-carrier transmission device in a multi-sector micro-cellular system comprising a. The method of claim 1, The forward receiving means, A first power divider distributing a signal transmitted from said forward transmitting means; A reference frequency recoverer for recovering a synchronization reference frequency from an output of the first power divider to provide a reference frequency; A first demodulator extracting and demodulating a control signal from an output of the first power divider; And Second frequency conversion means for converting the intermediate frequency of the output of the first power divider by the primary frequency up-filtering by using the surface acoustic wave filter, and converting the filtered signal by the secondary frequency up-converting to a radio frequency Multi-band multi-carrier transmission apparatus in a multi-sector micro-cellular system comprising a. The method of claim 5, A first optical / electric converter for converting a signal transmitted from the forward transmission means into an electrical signal and supplying it to the first power splitter Multi-band multi-carrier transmission apparatus in a multi-sector micro-cellular system characterized in that it further comprises. The method according to claim 5 or 6, The second frequency conversion means, A second variable attenuator for adjusting the level of the intermediate frequency signal of the first power divider; A third amplifier for amplifying the output of the second variable attenuator; A second frequency converter for upconverting the output of the third amplifier by a first frequency; A first surface acoustic wave filter for filtering the output of the second frequency converter; A fourth amplifier for amplifying the output of the first surface acoustic wave filter; A third frequency converter for upconverting the output of the fourth amplifier by a second frequency; A second band pass filter for band filtering the output of the third frequency converter; A fifth amplifier amplifying the output of the second bandpass filter; A third band pass filter for band filtering the output of the fifth amplifier; And A third variable attenuator for adjusting an output level of the third bandpass filter Multi-band multi-carrier transmission device in a multi-sector micro-cellular system comprising a. The method of claim 1, The reverse transmission means, Third frequency converting means for down-converting the primary radio frequency signal received through the antenna to filter the surface inertia filter and then down-converting the secondary frequency to output an intermediate frequency signal for the main signal; Fourth frequency converting means for converting the diversity radio frequency signal received through the antenna to down-convert the first frequency, filtering the surface inertia filter, and then down-converting the second frequency to output an intermediate frequency signal for the diversity signal. ; Second modulation means for modulating a reverse control signal; And Second power synthesizing means for power synthesizing the outputs of the third and second frequency converting means and the outputs of the second modulating means; Multi-band multi-carrier transmission apparatus in a multi-sector micro-cellular system comprising a. The method of claim 8, Second pre / optical converting means for converting the output of the second power synthesizing means into an optical signal and transmitting the optical signal to the reverse receiving means through an optical path; Multi-band multi-carrier transmitter in a multi-sector micro-cellular system characterized in that it further comprises. The method according to claim 8 or 9, Each of the third and fourth frequency converting means, A reception cavity filter for filtering radio frequency signals received through an antenna; A sixth amplifier amplifying the output of the receive cavity filter; A fourth frequency converter for down-converting the output of the sixth amplifier; A second surface acoustic wave filter for filtering the output of the fourth frequency converter; A seventh amplifier for amplifying the output of the second surface acoustic wave filter; A fifth frequency converter for downconverting the output of the seventh amplifier; A fourth bandpass filter for bandpass filtering the output of the fifth frequency converter; A fourth variable attenuator for adjusting an output level of the fourth bandpass filter; And An eighth amplifier amplifying the output of the fourth variable attenuator Multi-band multi-carrier transmission device in a multi-sector micro-cellular system comprising a. The method of claim 1, The reverse receiving means, Second power distribution means for distributing a signal transmitted from said reverse transmission means; Second demodulation means for demodulating a control signal of the output of the second power distribution means; Third power distribution means provided for each sector and distributing an output of the second power distribution means; Fifth frequency converting means provided for each sector and configured to up-convert the diversity intermediate frequency signal among the outputs of the third power distribution means and provide the converted frequency to the radio frequency receiving end of the base station; And Sixth frequency converting means provided for each sector and configured to up-convert the main intermediate frequency signal among the outputs of the third power distribution means to provide to the radio frequency receiving end of the base station; Multi-band multi-carrier transmission apparatus in a multi-sector micro-cellular system comprising a. The method of claim 11, Second optical / electric conversion means for converting the output of the reverse transmission means into an electrical signal and supplying the second power distribution means; Multi-band multi-carrier transmitter in a multi-sector micro-cellular system characterized in that it further comprises. The method according to claim 11 or 12, Each of the fifth and sixth frequency converting means, A fifth bandpass filter for bandpass filtering the output of the third power distribution means; A ninth amplifier amplifying the output of the fifth bandpass filter; A sixth frequency converter configured to up-frequency convert the output of the ninth amplifier; A sixth bandpass filter for band filtering the output of the sixth frequency converter; A tenth amplifier amplifying the output of the sixth bandpass filter; And A fifth variable attenuator for adjusting the output level of the tenth amplifier Multi-band multi-carrier transmission device in a multi-sector micro-cellular system comprising a.