KR20050061809A - Apparatus and method for beam forming hybrid chip-level, and system and method of hybrid chip-level beamformer based smart antenna base station - Google Patents

Abstract

The present invention relates to a hybrid chip level beamforming apparatus and a method thereof, and a hybrid antenna antenna based smart antenna base station system using the same and a method of operating the same.

The hybrid chip level beamforming apparatus according to the present invention adaptively extracts a DPCCH symbol by despreading a signal input from an array antenna, obtains a beamforming weight vector with a pilot symbol, and multiplies it at the chip level to form a beam. do.

In this way, the beamforming weight vector can be accurately obtained and the beamforming effect can be improved. This can increase the system capacity and the effective range of the base station.

Description

Hybrid chip level beamforming apparatus and method thereof, and hybrid antenna antenna system using smart chip level beamformer based on the same, and method of operation thereof SMART ANTENNA BASE STATION}

The present invention provides a hybrid chip level beam forming apparatus and method thereof and a hybrid chip level beam forming apparatus in an asynchronous wideband code division multiple access (WCDMA) smart antenna system using an array antenna. It relates to a smart antenna base station system and a method of operation thereof.

In a mobile communication base station system using an array antenna, various beamforming algorithms increase the antenna gain for a desired user signal and reduce the antenna gain for a user acting as an interference signal, thereby increasing the overall system capacity.

In terms of baseband processors, the easiest way to implement a smart antenna base station system is to add a beamformer without modification of the basic modem module already in development. In this respect, it is preferable to use a chip level beamformer that only needs to be interfaced with the basic modem demodulator module, rather than using a symbol level beamformer that cannot be modified to the despreader of the rake finger.

In general, a mobile communication system mainly uses an algorithm for obtaining a beamforming weight vector using a reference signal (pilot symbol, pilot channel).

In the uplink of a WCDMA system, a pilot symbol is transmitted in time multiplexed with various control signals in a dedicated physical control channel (hereinafter referred to as a 'DPCCH'), and the DPCCH is a dedicated physical data channel carrying data. Coded multiplexed with the Dedicated Physical Data Channel (hereinafter referred to as 'DPDCH') and transmitted in parallel. At this time, the total transmission power is transmitted by dividing the DPDCH and the DPCCH by a certain ratio. The ratio is determined by the spreading coefficients of the DPDCH and DPCCH and the power ratio (?? cd) of the DPDCH and DPCCH determined in the upper layer. Usually, when the traffic is opened, the chip power of the DPCCH is much smaller than the chip power of the DPDCH.

When the beam level weight vector is obtained in the chip level beam former, the input signal is received for each antenna and oversampled through the RF / IF stage, and the DPDCH and the DPCCH are not distinguished. The reference signal for this is used after spreading the pilot symbol into a chip level sequence. However, when used in this way, the DPCCH chip power of the received signal is small, so that the correlation between the received pilot chip and the pilot chip of the reference signal is poor, and thus there is a limit in accurately obtaining the beamforming weight vector.

Accordingly, in order to solve such a problem, Korean Patent Application No. 10-0075882 (filed Dec. 3, 2001) discloses a reference signal generator and a method and a chip-level beam former based smart antenna base station system using the same. And a method of operation thereof ".

This conventional technique generates a reference signal suitable for a chip level beamformer using a crystal directing mode in which the DPDCH / DPCCH symbol estimated by the discriminator after rake synthesis is generated, thereby generating beamforming weights compared to using only a pilot symbol as a reference signal. A more accurate method of obtaining vectors is presented.

However, in the above-described conventional technique, since a symbol after rake synthesis is used as a reference signal, modification of the basic modem module is inevitable, and an input signal must be stored in a buffer until the symbol can be used as a reference signal. As a result, an increase in hardware is concerned, and a delay of a control signal for power control occurs due to a delay of a signal stored in a buffer. Therefore, it is necessary to consider the beamforming weight vector generator having a different structure within a range where modification of the modem module is not applied.

SUMMARY OF THE INVENTION The present invention has been made in an effort to provide a hybrid chip level beam forming apparatus and a method for adaptively obtaining a symbol level and multiplying the same at a chip level.

According to another aspect of the present invention, an accurate beamforming weight vector is obtained by using a DPCCH symbol and an adaptively repeated pilot symbol, which are obtained by integrating and extracting the received signal of each antenna input to the chip level beamformer by an adaptively set interval. To provide a hybrid chip-level beamformer based smart antenna base station system and an operation method thereof.

Another technical problem of the present invention is to include a synchronization tracking block necessary for despreading the received signal of each antenna into symbols, so that the hybrid chip level beamformer includes a hybrid chip level beam that does not require modification of the basic WCDMA modem demodulator module. It is to provide a shaper-based smart antenna base station system and its operation method.

In order to solve this problem, the present invention provides a hybrid chip level beamforming apparatus for beamforming in a wideband code division multiple access (WCDMA) system having an array antenna.

The hybrid chip level beamforming apparatus according to an aspect of the present invention is adaptively repeated with a Dedicated Physical Control Channel (DPCCH) symbol extracted by integrating an oversampled input signal vector through the array antenna by an adaptively set interval. A hybrid beamforming weight vector generator for generating a chip level beamforming weight vector using a reference signal; And a beam forming unit configured to form a beam by multiplying the beam level weight vector of the chip level generated from the hybrid beamforming weight vector generator and the input signal vector.

The hybrid beamforming weight vector generator may include: an input signal adaptive symbol level converter configured to adaptively convert the input signal vector into a symbol level input signal vector; An adaptive reference signal generator which receives an adaptive integration section and generates a reference signal suitable for the input signal adaptive symbol level converter according to the adaptive integration section; And a beamforming weight vector generator for generating a beamforming weight vector based on a symbol level input signal vector and a reference signal received from the input signal adaptive symbol level converter and the adaptive reference signal generator, respectively.

The input signal adaptive symbol level converting unit may further include a code tracker configured to receive an output of the beam forming unit as an input and track code timing and decimation timing; A timing controller that receives timing tracking information from the code tracker to extract and control accurate code timing and decimation timing; A decimator receiving a decimation point from the timing controller and decimating the input signal vector for each antenna; A scrambling code generator for receiving a code timing from the timing controller and generating a scrambling code; And an integrator that multiplies the scrambling code by a decimated signal and then integrates the integral section.

The adaptive reference signal generator may generate a reference signal by repeating a pilot symbol according to the adaptive integration section.

The present invention provides a hybrid chip level beamforming method for beamforming in a wideband code division multiple access (WCDMA) system having an array antenna.

A hybrid chip level beamforming method according to another aspect of the present invention comprises the steps of: a) adaptively extracting a Dedicated Physical Control Channel (DPCCH) symbol from an oversampled input signal vector received from the array antenna; b) generating a reference signal by repeating a pilot symbol based on the DPCCH symbol according to an integration period; c) generating a chip level beamforming weight vector using the reference signal generated in step b) and the DPCCH symbol extracted in step a); And d) multiplying an input signal vector received by each array antenna by a chip-level beamforming weight vector generated from step b) to form a beam.

And a) decimating the oversampled input signal vector received from the array antenna; Ii) multiplying the decimated signal with a scrambling code; And iv) extracting the DPCCH symbol by integrating the signal output from ii) during the integration period and converting the signal to a symbol level input signal vector.

The present invention provides a smart antenna base station system based on a hybrid chip level beam former in a wideband code division multiple access (WCDMA) system having an array antenna.

According to another aspect of the present invention, there is provided a hybrid chip level beamformer based smart antenna base station system comprising: an RF / IF receiver for converting a signal received through the array antenna into a baseband input signal vector; A multipath search unit for detecting a multipath from a baseband input signal vector of the RF / IF receiver and estimating a delay time of each path; A modem controller configured to control the multi-path search unit to receive a delay time for each path and provide allocation information and operation control information for the corresponding user, the corresponding path; Despreading the signal received through the array antenna based on the information allocated from the modem controller to adaptively extract the DPCCH symbol, and generate a chip level beamforming weight vector of the corresponding path through a pilot symbol corresponding thereto; A hybrid chip level beamformer configured to form a beam based on the generated chip level beamforming weight vector; And receiving a beamformed signal of a corresponding path from the hybrid chip level beamformer, and demodulating a Dedicated Physical Data Channel (DPDCH) and Dedicated Physical Control Channel (DPCCH) symbol based on information allocated from the modem controller. It includes a WCDMA demodulator. In this case, the hybrid chip level beamforming unit despreads the received signal of the array antenna, integrates by the adaptively set interval, extracts the DPCCH symbol, and adaptively repeats the pilot according to the integration interval received from the modem controller. A chip level beamforming weight vector may be generated using a symbol, and the beamformed signal may be output by multiplying the generated chip level beamforming weight vector by a received signal of each array antenna.

The multi-channel WCDMA demodulation unit may include: a rake finger unit that separates the DPDCH and DPCCH symbols based on information allocated from a modem control unit and estimates a channel; And a rake synthesis unit configured to perform channel compensation on the DPDCH and the DPCCH based on the channel estimate and to synthesize the channel compensated DPDCH and the DPCCH for each user.

The rake finger unit may include: a decimator configured to decimate a beamformed signal input from the hybrid chip level beamformer; An input signal selector configured to select a signal to be demodulated by a corresponding finger among the signals output from the decimator; A despreader for despreading the signal selected from the input signal selector to separate the DPDCH and the DPCCH; A code tracking unit for tracking code timing and decimation timing from the DPCCH output from the despreader; A timing controller for controlling accurate decimation timing from the code tracking unit; A channel estimator estimating a channel from the DPCCH and pilot symbols separated from the despreader; And a memory unit that stores DPDCH and DPCCH during the delay caused by the channel estimator.

The present invention provides a method of operating a hybrid chip level beamformer based smart antenna base station system in a wideband code division multiple access (WCDMA) system having an array antenna.

According to still another aspect of the present invention, there is provided a method of operating a hybrid chip level beamformer based smart antenna base station system, the method comprising: a) converting a signal received through the array antenna into a baseband input signal vector; b) detecting the multiple paths from the baseband input signal vector from step a) and estimating the delay time of each path; c) outputting allocation information based on the delay time estimated from step b); d) adaptively extract the DPCCH symbol by despreading the signal received through the array antenna based on the information allocated from step c), and generating a chip level beamforming weight vector of the corresponding path through a pilot symbol corresponding thereto; And multiplying the generated chip level beamforming weight vector by the baseband input signal to form a beam; And e) demodulating DPDCH and DPCCH symbols by receiving the beamformed signal based on the information allocated from step c).

And e) comprises: i) generating a chip level signal by decimating the signal formed in the beam from step d); Ii) selecting a beam-formed signal to demodulate among the signal at the chip level; Iv) despreading the beamformed signal selected from step ii) to separate the DPDCH and DPCCH symbols; Iii) channel estimation using a DPCCH symbol separated from step iii) and a pilot symbol according to the DPCCH symbol; And iii) compensating for the DPDCH and DPCCH based on the channel estimate from step iii), and synthesizing the DPDCH and DPCCH.

In addition, the step e) may further include a step of tracking timing after receiving the DPCCH symbol separated from step iii) after step iii).

And a decimation point for decimating from the step iv) based on the timing value tracked from the step iv).

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention. Like parts are designated by like reference numerals throughout the specification.

First, a WCDMA smart antenna base station system based on a hybrid chip level beam former according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 and 2.

1 is a diagram illustrating a configuration of a hybrid chip level beamformer based WCDMA smart antenna base station system according to an embodiment of the present invention.

As shown in FIG. 1, a WCDMA smart antenna base station system based on a hybrid chip level beamformer according to an embodiment of the present invention includes an RF / IF receiver 100, a chip level beamformer 200, and a multi-channel WCDMA demodulator module 300. ), A multi-path searcher 400 and a modem controller 500.

The RF / IF receiver 100 converts the signals input from the base station array antennas ANT ₁ to ANT _M having M antenna array elements into digital baseband input signal vectors oversampled for each antenna and outputs the converted signals.

The chip level beam former 200 consists of a total of P chip level beam former blocks, each block comprising a beam former 201 and a hybrid chip level beam builder 202.

The chip level beamformer 200 operates only blocks allocated from the modem controller 500. The chip level beamformer 200 enters the input signal vector output through the RF / IF receiver 100 into every block of the chip level beamformer 200. In the block of the chip level beam former 200 allocated from the modem controller 500, the hybrid chip level beam former 202 generates the chip level beamforming weight vector, and the beam former 201 generates the beam forming weight vector and the input signal. Multiply by vector to synthesize.

The multichannel WCDMA demodulator module 300 includes several Rake fingers 301 and a Rake finger synthesizer 310. The multi-channel WCDMA demodulator module 300 operates only a block allocated from the modem controller 500 among a plurality of rake fingers, and demodulates DPDCH and DPCCH symbols in the assigned rake finger 301.

The multipath searcher 400 receives the input signal vector received for each antenna, detects the multipath, estimates the delay time for each multipath, and transfers the value to the modem controller 500.

The modem controller 500 allocates the chip level beamformer 200 and the multi-channel WCDMA demodulator module 300 according to the estimated delay time for each multipath, and provides all the information necessary for demodulation.

2 is a flowchart illustrating a method of operating a WCDMA smart antenna base station system based on a hybrid chip level beam former according to an embodiment of the present invention.

First, a signal input from the base station array antennas ANT ₁ to ANT _M having M antenna array elements is an oversampled digital baseband input signal vector for each antenna through the RF / IF receiver 100. To obtain (S100). The RF / IF receiver 100 then inputs the input signal vector Are output to the multipath searcher 400 and the multi-channel WCDMA demodulator module 300.

The multipath searcher 400 receives the input signal vector received for each antenna, detects the multipath, estimates the delay time for each multipath, and transmits the delay time estimation value to the modem controller 500 (S110).

The controller 500 allocates the chip level beamformer 102 and the multi-channel WCDMA demodulator module 300 according to the estimated delay time for each multipath (S120), and provides all information necessary for demodulation.

The chip level beamformer 200 composed of P blocks has an input signal vector output from the RF / IF receiver 100. The beam is formed by receiving the input (S130). In the block of the chip level beam former 200 allocated from the modem controller 500 to form the beam, a beamforming weight vector is generated (S133). The beam former 201 multiplies the formed beamforming weight vector and the input signal vector, and then combines the beamformers to form a beam (S134). As such, the beamformed signal is output to the multi-channel WCDMA demodulator module 300.

 The multi-channel WCDMA demodulator module 300 operates only the rake finger 301 assigned by the modem controller 500, and demodulates the DPDCH and DPCCH symbols at the assigned finger (S140).

Next, a hybrid chip level beam builder 202 according to an embodiment of the present invention will be described in detail with reference to FIGS. 3 and 4.

3 and 4 are flowcharts illustrating a configuration diagram of a hybrid chip level beamformer and a method of operating the hybrid chiplevel beamformer in a WCDMA smart antenna base station system based on a hybrid chip level beamformer according to an exemplary embodiment of the present invention. .

First, referring to FIG. 3, the hybrid chip level beamformer 202 includes an adaptive reference signal generator 211, an input signal adaptive symbol level converter 212, and a beamforming weight vector generator 213.

The adaptive reference signal generator 211 adaptively generates a reference signal according to the integration section L received from the modem controller 500. When the integral section is 256, the pilot symbol may be used as a reference signal as it is, but otherwise, the pilot symbol may be repeatedly used as shown in Table 1.

Integral section Number of pilot symbol repetitions 4 64 8 32 16 16 32 8 64 4 128 2 256 One

The input signal adaptive symbol level converter 212 adaptively converts the input signal into a symbol and adaptively extracts the DPCCH symbol from the input signal vector oversampled by the RF / IF receiver 100.

The beamforming weight vector generator 213 receives an input signal symbolized by the input signal adaptive symbol level converter 212 and a reference signal from the adaptive reference signal generator 211 to obtain and output a chip level beamforming weight vector. The beamforming weight vector generator 213 implements a beamforming algorithm such as a sample matrix inversion (SMI) algorithm, a normalized LMS (N-LMS), or an RLS algorithm that requires a reference signal.

The input signal adaptive symbol level converter 212 includes a decimator 221, an integrator 222, a code tracker 223, a beam former timing controller 224 and a scrambling code generator 225.

The decimator 221 receives the decimation point of the beam former block from the beam former timing controller 224 and decimates for each antenna.

The integrator 222 receives the integration section L from the modem controller 500 and performs integration by that section.

The code tracker 223 receives the output of the beam former 201 and tracks code timing and decimation timing.

The beamformer timing controller 224 receives timing tracking information of the code tracker 223, extracts accurate code timing and decimation timing, and controls code timing and decimation timing. The beamformer timing controller 224 also outputs the decimation points of the corresponding chip level beamformer 200 block.

The scrambling code generator 225 receives basic information for generating a scrambling code from the modem controller 500 and receives code timing from the timing controller 224 to generate a scrambling code according to the timing to distinguish a user.

Next, the operation of the hybrid chip level beam former 202 configured as described above will be described in detail with reference to FIG. 4.

As shown in FIG. 4, the decimator 221 is an input signal vector from the RF / IF receiver 100. Receive (S100). The received decimator 221 receives the decimation point of the beam former block from the beam former timing controller 224 and decimates for each antenna (S131).

Then, the output of the beam former 201 is received as an input and the correct code timing and decimation timing are tracked from the code tracker 223 (S135).

Then, multiply the decimated signal with the scrambling code based on the scrambling code timing information received from the timing controller 224, and receive an integration section L from the modem controller 500 to perform integration by symbol. Convert (S132).

The beamforming weight vector generator 213 receives the transformed symbol from the beamforming weight vector generator 213, receives the reference signal from the adaptive reference signal generator 211, and forms the beamforming weight vector W _P1 to W _PM . To generate (S133).

The beam forming weight vector formed by the beam former 201 and the input signal vector are multiplied and synthesized to form a beam (S134). In this way, the beam-formed signal is input to the code tracker to track accuracy and timing (S135).

5 and 6, a multi-channel WCDMA demodulator according to an embodiment of the present invention will be described in detail.

5 and 6 are flowcharts illustrating the configuration of the multi-channel WCDMA demodulator and the operation of the multi-channel WCDMA demodulator in the hybrid chip level beamformer based WCDMA smart antenna base station system according to an embodiment of the present invention.

As shown in FIG. 5, the multichannel WCDMA demodulator module 300 includes a rake finger 301 and a rake finger synthesizer 310.

The rake finger 301 is composed of a plurality of blocks, and only the block allocated from the modem controller 500 operates, and the assigned rake finger 301 demodulates the DPDCH and DPCCH symbols.

The rake finger synthesizer 310 compensates for the DPDCH and DPCCH by using the DPDCH, DPCCH, and channel estimates from each rake finger 301 and synthesizes the corresponding user.

The rake finger 301 is a decimator 302, a timing controller 303, an input selector 304, a code generator 305, a despreader 306, a code tracker 307, a memory unit 308 and a channel estimator. 309.

The decimator 302 receives P signals from the chip level beam former 200, receives the decimation points of the corresponding finger from the timing controller 303, and generates a chip level signal.

The timing controller 303 controls the accurate decimation timing from the code tracker 307 and outputs the decimation point of the finger.

The input selector 304 selects a beamformer output to be demodulated by the finger among the chip level signals output from the decimator 302.

The code generator 305 generates a scrambling code and a channelization code. The scrambling code is used to distinguish the user, and the channelization code is used to separate the DPDCH and the DPCCH. The code generator 305 outputs the scrambling code and the channelization code to the despreader 306 based on the timing information output from the timing controller 303.

The despreader 306 despreads the beamformed received signal selected from the input selector 304 to separate and assign the DPDCH and DPCCH of the assigned user into symbols.

The code tracker 307 receives the Early / Late DPCCH symbol to track accurate timing.

 The memory unit 308 stores the despread DPDCH and DPCCH during channel estimation.

The channel estimator 309 receives the despread DPCCH and the pilot and estimates a channel for the corresponding finger.

Hereinafter, an operation process of the multichannel WCDMA demodulator 300 configured as described above will be described in detail with reference to FIG. 6.

As shown in FIG. 6, the decimator 302 is formed by P signals beamed from the chip level beamformer 200. Is input (S141). The decimator 302 receives the decimation point of the finger from the timing controller 303 and decimates to generate a chip level signal (S142). The decimator 302 then outputs the generated chip level signal to the input selector 304.

The input selector 304 receives a chip level signal from the decimator 302 and selects a beamformer output to be demodulated by the finger (S143).

The despreader 306 despreads the beamformed signal selected from the input selector 304 to separate the allocated DPDCH and the DPCCH and generate a DPCCH symbol (S144). In addition, the code tracker 307 receives the Early / Late DPCCH symbol to track the correct timing (S145).

The despread DPDCH and DPCCH are stored in the memory unit 308 during channel estimation, and the channel estimator 309 receives the despread DPCCH and pilot symbols to estimate a channel for the corresponding finger (S146). .

Then, the rake finger synthesizer 310 receives the DPDCH and DPCCH output from each rake finger 301 and compensates for the DPDCH and DPCCH based on the channel estimate estimated from the channel estimator 309, and then for each DPDCH and DPCCH. The synthesized signal is demodulated (S147).

The above embodiments are intended to illustrate the present invention, the scope of the present invention is not limited to the embodiments, it can be modified or modified by those skilled in the art within the scope of the invention defined by the appended claims. .

According to the present invention, the beamforming weight vector can be obtained more accurately through the WCDMA smart antenna base station system based on the hybrid chip level beamformer, so that the beamforming effect can be increased, thereby increasing the system capacity and the effective range of the base station. It works.

In addition, the present invention eliminates the need for modification of the multi-channel WCDMA demodulator module because the code timing tracking circuit is added to the hybrid chip level beam former, thereby enabling the WCDMA base station system to be easily implemented as a smart antenna base station system. .

1 is a block diagram of a hybrid chip level beamformer based WCDMA smart antenna base station system according to an embodiment of the present invention.

FIG. 2 is a flowchart illustrating a method of operating a WCDMA smart antenna base station system based on a hybrid chip level beam former according to FIG. 1.

3 is a configuration diagram of the hybrid chip level beam former in FIG. 1.

4 is a flowchart illustrating a method of operating the hybrid chip level beam former according to FIG. 3.

FIG. 5 is a diagram illustrating the configuration of a multi-channel WCDMA demodulator module in FIG. 1.

6 is a flowchart illustrating a method of operating a multichannel WCDMA demodulator module according to FIG. 5.

Claims (14)

A hybrid chip level beamforming apparatus for beamforming in a wideband code division multiple access (WCDMA) system having an array antenna, A chip-level beamforming weight vector is generated by using a Dedicated Physical Control Channel (DPCCH) symbol extracted by integrating the oversampled input signal vector through the array antenna by an adaptively set interval and an adaptively repeated reference signal. A hybrid beamforming weight vector generator; And A beam forming unit multiplying the beam forming weight vector of the chip level generated by the hybrid beamforming weight vector generator and the input signal vector to form a beam; Hybrid chip level beam forming apparatus comprising a. The method of claim 1, The hybrid beamforming weight vector generation unit, An input signal adaptive symbol level conversion unit for adaptively converting the input signal vector into a symbol level input signal vector; An adaptive reference signal generator which receives an adaptive integration section and generates a reference signal suitable for the input signal adaptive symbol level converter according to the adaptive integration section; And A beamforming weight vector generator for generating a beamforming weight vector based on a symbol level input signal vector and a reference signal respectively received from the input signal adaptive symbol level converter and the adaptive reference signal generator; Hybrid chip level beam forming apparatus comprising a. The method of claim 2, The input signal adaptive symbol level converter, A code tracker that receives an output of the beam forming unit as an input and tracks code timing and decimation timing; A timing controller that receives timing tracking information from the code tracker to extract and control accurate code timing and decimation timing; A decimator receiving a decimation point from the timing controller and decimating the input signal vector for each antenna; A scrambling code generator for receiving a code timing from the timing controller and generating a scrambling code; And An integrator that multiplies the scrambling code by a decimated signal and then integrates by an integration period Hybrid chip level beam forming apparatus comprising a. The method of claim 2, The adaptive reference signal generator, And generating a reference signal by repeating a pilot symbol according to the adaptive integration section. A hybrid chip level beamforming method for beamforming in a wideband code division multiple access (WCDMA) system having an array antenna, a) adaptively extracting a Dedicated Physical Control Channel (DPCCH) symbol from an oversampled input signal vector received from the array antenna; b) generating a reference signal by repeating a pilot symbol based on the DPCCH symbol according to an integration period; c) generating a chip level beamforming weight vector using the reference signal generated in step b) and the DPCCH symbol extracted in step a); And d) forming a beam by multiplying an input signal vector received by each array antenna by a chip level beamforming weight vector generated from step b) Hybrid chip level beam forming method comprising a. The method of claim 5, Step a) is Iii) decimating the oversampled input signal vector received from the array antenna; Ii) multiplying the decimated signal with a scrambling code; And I) extracting the DPCCH symbol by integrating the signal output from ii) during the integration period and converting the signal to a symbol level input signal vector; Hybrid chip level beam forming method comprising a. A smart antenna base station system based on a hybrid chip level beamformer in a wideband code division multiple access (WCDMA) system having an array antenna, An RF / IF receiver converting a signal received through the array antenna into a baseband input signal vector; A multipath search unit for detecting a multipath from a baseband input signal vector of the RF / IF receiver and estimating a delay time of each path; A modem controller configured to control the multi-path search unit to receive a delay time for each path and provide allocation information and operation control information for the corresponding user, the corresponding path; Despreading the signal received through the array antenna based on the information allocated from the modem controller to adaptively extract the DPCCH symbol, and generate a chip level beamforming weight vector of the corresponding path through a pilot symbol corresponding thereto; A hybrid chip level beamformer configured to form a beam based on the generated chip level beamforming weight vector; And A multi-channel WCDMA that receives a beamformed signal of a corresponding path from the hybrid chip level beamformer and demodulates a dedicated physical data channel (DPDCH) and a dedicated physical control channel (DPCCH) symbol based on information allocated from the modem controller. Demodulator Smart antenna base station system based on the hybrid chip level beamformer comprising a. The method of claim 7, wherein Hybrid chip level beam forming unit, Despreading the received signal of the array antenna and integrating by adaptively set intervals to extract DPCCH symbols, and using the pilot symbol adaptively repeated according to the integration interval received from the modem controller, the chip level beamforming weight vector Generating a signal and multiplying the generated chip level beamforming weight vector by a received signal of each array antenna to output a beamformed signal; Smart antenna base station system based on the hybrid chip level beam former, characterized in that. The method of claim 7, wherein The multi-channel WCDMA demodulation unit, A rake finger unit for separating DPDCH and DPCCH symbols and estimating a channel based on information allocated from the modem control unit; And A rake synthesis unit for performing channel compensation on the DPDCH and DPCCH based on the channel estimate and synthesizing the channel compensated DPDCH and DPCCH for each user. Smart antenna base station system based on the hybrid chip level beamformer comprising a. The method of claim 9, The rake finger portion, A decimator for decimating a beamformed signal input from the hybrid chip level beamformer; An input signal selector configured to select a signal to be demodulated by a corresponding finger among the signals output from the decimator; A despreader for despreading the signal selected from the input signal selector to separate the DPDCH and the DPCCH; A code tracking unit for tracking code timing and decimation timing from the DPCCH output from the despreader; A timing controller for controlling accurate decimation timing from the code tracking unit; A channel estimator estimating a channel from the DPCCH and pilot symbols separated from the despreader; And Memory unit for storing DPDCH and DPCCH during the delay caused by the channel estimator Smart antenna base station system based on the hybrid chip level beamformer comprising a. A method of operating a smart chip base station system based on a hybrid chip level beamformer in a wideband code division multiple access (WCDMA) system having an array antenna, a) converting a signal received via the array antenna into a baseband input signal vector; b) detecting the multiple paths from the baseband input signal vector from step a) and estimating the delay time of each path; c) outputting allocation information based on the delay time estimated from step b); d) adaptively extract the DPCCH symbol by despreading the signal received through the array antenna based on the information allocated from step c), and generating a chip level beamforming weight vector of the corresponding path through a pilot symbol corresponding thereto; And multiplying the generated chip level beamforming weight vector by the baseband input signal to form a beam; And e) demodulating DPDCH and DPCCH symbols by receiving the beamformed signal based on the information allocated from step c); Method of operation of a hybrid chip level beamformer based smart antenna base station system comprising a. The method of claim 11, In step e), Iii) decimating the beam-formed signal from step d) to generate a chip level signal; Ii) selecting a beam-formed signal to demodulate among the signal at the chip level; Iv) despreading the beamformed signal selected from step ii) to separate the DPDCH and DPCCH symbols; Iii) channel estimation using a DPCCH symbol separated from step iii) and a pilot symbol according to the DPCCH symbol; And Iii) compensating the DPDCH and DPCCH based on the channel estimate value from step iii) and synthesizing the DPDCH and DPCCH Method of operation of a hybrid chip level beamformer based smart antenna base station system comprising a. The method of claim 12, In step e), after the step iii), Iii) tracking the timing by receiving the DPCCH symbol separated from step iii); Method of operation of a hybrid chip level beamformer based smart antenna base station system further comprising. The method of claim 13, And outputting a decimation point for decimating from the step iv) based on the timing value tracked from the step iv).