KR100444732B1 - Chip processing apparatus in demodulating apparatus of a base station for code division multiple access system and method thereof, and demodulating apparatus of a base station using the same apparatus - Google Patents

Abstract

The present invention relates to a chip computing device and method thereof in a base station demodulator of a code division multiple access system, and a base station demodulator using the device. In particular, the chip computing device despreads a signal received through an antenna with a minimum spreading element. A plurality of finger units for generating a specific symbol and performing independent despreading by the number of clocks per chip through time division; A channel scheduler for multiplexing the specific symbols generated in the plurality of finger units through scheduling, and then attaching and outputting finger number tags corresponding to the multiplexed symbols; And a finger position tracker for outputting a command to move each position of the plurality of finger units with reference to a signal output from the channel scheduler. According to the present invention, time efficiency is achieved by performing the role of an independent finger as many as the number of clocks per chip in one device, and increasing the efficiency of the device, and by multiplexing the multiplexed finger outputs output from several devices once again through scheduling. When estimating or combining channels using the output of a finger, one device facilitates processing using time division.

Description

CHIPS PROCESSING APPARATUS IN DEMODULATING APPARATUS OF A BASE STATION FOR CODE DIVISION MULTIPLE ACCESS SYSTEM AND METHOD THEREOF, AND DEMODULATING APPARATUS OF A BASE STATION USING THE SAME APPARATUS}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a base station demodulator for Code Division Multiple Access (CDMA) systems, and more particularly, to a chip computing device and a method thereof in a base station demodulator for code division multiple access systems.

In general, an existing CDMA base station demodulator such as an IS-95 includes a chip computing device for despreading a signal received through a plurality of antennas in each sector in a plurality of sectors. There are several devices in parallel to play the role.

However, in this method, the degree of finger integration is reduced, and a predetermined number of fingers are provided for each channel, so that in actual use, even though there are many multipaths in some channels, the fingers are not enough. There is a problem that you can not use the finger efficiently because there is little finger left.

Therefore, in order to increase the capacity of the chip computing device and the base station demodulator, there is a need for a structure in which the finger density is increased and the channel can be dynamically allocated.

Accordingly, an object of the present invention is to solve the problems of the prior art as described above, to improve the efficiency of the device by time-dividing one device using time division, and to manage resources such as the number of fingers per channel. The present invention provides a chip computing device and method in a base station demodulator for a CDMA system that can efficiently manage limited resources by dynamically allocating only necessary resources.

1 is a schematic block diagram of a base station demodulator of a CDMA system according to an embodiment of the present invention.

FIG. 2 is a detailed block diagram of a chip calculator in a base station demodulator of the CDMA system shown in FIG.

3 is a detailed block diagram of the finger unit shown in FIG. 2.

4 is a flowchart of a chip calculation method in a base station demodulator of a CDMA system according to an embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

10 chip operation unit 20 symbol operation unit 30 frame operation unit

40: storage device 50: storage device control unit 60: host interface

100: finger pool PN ₁ ,. , PN _N : finger unit 110: channel scheduler

120: finger position tracker 1000: input buffer 1100: controller

1200: sampler 1300: code generator 1400: despreader

1500: finger position controller 1110: global frame counter

1120: finger number generator 1130: finger setting storage unit

A chip computing device in a base station demodulator of a CDMA system according to a feature of the present invention for achieving the above object,

A chip computing device included in a base station demodulator of a code division multiple access system and despreading a signal received through a plurality of antennas in each sector in a plurality of sectors,

A plurality of finger units for generating a specific symbol for despreading a signal received through the antenna with a minimum spreading element and performing independent despreading by the number of clocks per chip through time division; A channel scheduler for multiplexing the specific symbols generated in the plurality of finger units through scheduling, and then attaching and outputting finger number tags corresponding to the multiplexed symbols; And a finger position tracker for outputting a command to move each position of the plurality of finger units with reference to a signal output from the channel scheduler.

Wherein each finger unit comprises an input buffer unit for storing a signal received through the antenna; A controller for generating a finger number to be operated at every clock during one chip period, storing setting information necessary for each finger, and performing overall control of the finger unit by providing stored setting information corresponding to the generated finger number; A sampling unit which takes a chip sample and a sample for finger position tracking in the input buffer unit using setting information of the corresponding finger provided by the controller; A code generation unit generating a specific code using setting information of the corresponding finger provided by the control unit; Compensating a code corresponding to the specific code in a sample taken by the sampling apparatus by using the specific code generated by the code generator, generating a corresponding symbol by accumulating the spreading elements of a specific channel and outputting the generated symbol to the channel scheduler. Despreading unit; And a finger position controller for outputting a control signal for moving the corresponding finger to the controller according to a finger position movement command output from the finger position tracker.

The control unit may include: a global frame counter which outputs a corresponding counter value by operating every clock with a period of one frame; A finger number generator for generating a finger number to be processed for each clock for one chip period according to a counter value output from the global frame counter; And a finger setting storage unit for storing the setting information and providing setting information corresponding to the finger number generated by the finger number generation unit.

The specific symbol may be a control channel symbol, a data channel symbol, and a finger position tracking symbol, and the multiplexed symbol may be a multiplexed control channel symbol, a multiplexed channel symbol, and a multiplexed finger position tracking symbol.

The finger position tracking unit may output a command for moving each position of the plurality of finger units with reference to the multiplexed finger position tracking symbols among the multiplexed symbols output from the channel scheduler.

Chip computing method in a base station demodulator of a CDMA system according to another aspect of the present invention,

A chip computing method included in a base station demodulator of a code division multiple access system and despreading a signal received through a plurality of antennas for each sector in a plurality of sectors,

a) receiving a signal received from the antenna and storing a signal for one chip period; b) taking a chip sample from the signal stored in step a) and a sample half a chip away from the sampling point for finger position control using the information set for the particular finger; c) generating a scrambling code and a channelization code assigned to each finger using the information set for the specific finger; d) compensating and accumulating the scrambling code and the channelization code generated in step c) in the chip sample taken in step b) and a sample half chip away from the sampling point to generate a specific symbol; e) scheduling and multiplexing the generated specific symbols; f) generating a finger position movement command by tracing the position of the finger using the specific multiplexed symbol; And g) updating the setting information for the finger according to the generated finger position movement command to adjust the position of the finger.

Before the step a), receiving and storing the setting information required for a finger from a user; And determining a number of a finger to be processed in a clock in a chip section, and generating a finger-related internal control signal using setting information corresponding to the determined finger number among the stored setting information.

After step d), the method may further include attaching a finger number tag to the specific symbol generated in step d).

A base station demodulator of a CDMA system according to another aspect of the present invention,

Chip computing unit for despreading a signal received through a plurality of antennas for each sector in a plurality of sectors, wherein the chip computing unit controls a control channel symbol, a data channel symbol, and a finger position tracking symbol to despread the received signal with a minimum spreading element. A plurality of finger units which generate simultaneously and perform independent despreading by the number of clocks per chip through time division; A channel scheduler for multiplexing the control channel symbol, the data channel symbol, and the finger position tracking symbol generated in the plurality of finger units through a scheduling, and then attaching and outputting a finger number tag corresponding to the multiplexed symbol; And a finger position tracker for outputting a command for shifting each position of the plurality of finger units with reference to the finger position track symbol output from the channel scheduler; A symbol operator which estimates a channel by selectively using symbols of a control channel and a data channel from a signal that is despread and output from the chip operator and combines signals input through multiple paths; Frame operation unit unit for TFCI decoding, FBI (Feedback Information) decoding, frame synchronization estimation, signal-to-noise ratio estimation, post combining and secondary deinterleaving operations ; A memory device for storing outputs of the chip operation unit, symbol operation unit, and frame operation unit; A memory device controller for controlling input / output signals between the chip operator, the symbol operator, and the frame operator and the memory; And a host interface for controlling input and output between the chip operator, the symbol operator, and the frame operator.

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

1 is a schematic block diagram of a base station demodulator of a CDMA system according to an embodiment of the present invention.

As shown in FIG. 1, a base station demodulator according to an embodiment of the present invention includes a chip operator 10, a symbol operator 20, a frame operator 30, a memory 40, a memory controller 50, and And a host interface 60.

The chip operation unit 10 selects signals input from L antennas for each sector in M sectors according to a setting, despreads them with a minimum spreading element, and arranges the signals through scheduling.

The symbol operator 20 estimates a channel using the despread signal of the chip operator 10 and combines the despread signal output from the finger unit dynamically allocated to each user to generate combined information.

The frame operation unit 30 performs TFCI decoding, FBI decoding, frame synchronization estimation, post combining and secondary deinterleaving, and signal-to-noise ratio estimation according to delay time and reliability conditions using the combined information output from the symbol operation unit 20. .

The memory device 40 stores the outputs of the chip operator 10, the symbol operator 20, and the frame operator 30 so that they can be used when needed.

The memory device controller 50 controls the input / output between the chip operator 10, the symbol operator 20, the frame operator 30, and the memory device 40.

The host interface 60 controls the input / output between the chip operator 10, the symbol operator 20, the frame operator 30, and the external host.

FIG. 2 is a detailed block diagram of the chip computing unit 10 in the base station demodulator of the CDMA system shown in FIG.

As shown in FIG. 2, the chip operator 10 includes a finger pool 100, a channel scheduler 110, and a finger position tracker 120.

The finger pool 100 binds _N finger units (FU ₁ ,..., FU _N ) into one pool.

Each finger unit (FU ₁ , ..., FU _N ) operates at a clock speed of 16 times the chip speed of 3.84 Mcps, and despreads 16 uplink channels with one device through time division. At this time, each finger unit PU ₁ ,..., PU _N may be a dedicated channel, a random access channel, a common packet channel, which is a CDMA uplink channel according to a setting. And the like can be despread, and each of the signals received through a plurality of antennas in one sector is processed.

The finger units PU ₁ ,..., PU _N serve as K independent fingers that are the ratio of the chip period 101 to the clock period 102 through time division, and control channel symbol 103 and data channel symbol. The 104 and finger position tracking symbols 105 are output with the finger number tag attached, respectively.

The channel scheduler 110 multiplexes the signals output from the N finger units PU ₁ ,..., And PU _N of the finger pool 100 through scheduling to multiplex the control channel symbol 111 and the multiplexed data channel symbol. (112) and a finger number tag attached to the multiplexed finger position tracking symbol 113, respectively, the two symbol outputs 111 and 112 are output to the symbol operation unit 20, and the other symbol output 113 is a finger. Output to the position tracker 120.

Although up to NK finger outputs may be output from the finger pool 100 to the channel scheduler 110, symbols from one finger unit PU ₁ ,..., PU _N may be used once per despreading period.

As an example, the control channel has 256 despread periods, resulting in up to NK outputs during 256K clock. Thus, if N is less than 256, it can be made into one multiplexed signal.

At this time, the time between the multiplexed control channel symbols in the portion using the finger output is scheduled to fall to a slightly smaller than 256 / N clock to facilitate time division processing. The reason for making it smaller than the 256 / N clock is that if the finger position is advanced, more than NK output symbols can be output during the 256 chip period.

In the case of the data channel, the despreading period is different depending on the finger setting. Therefore, the concept of capacity should be used, and if the number of data channel symbol outputs according to the finger capacity set for 256 chips is smaller than 256K, multiplexed data channel symbols can be produced through scheduling.

The multiplexed control channel symbol 111 and data channel symbol 112 output with the finger number tag may be used for channel estimation and rake combining in the symbol calculator 20.

Meanwhile, the multiplexed finger position tracking symbol 113 outputted with the finger number tag is input to the finger position tracker 120 and used for finger position tracking.

The finger position tracker 120 tracks the finger position for each finger by one device by time division using the multiplexed finger position tracking symbol 113. When the position of the finger is moved, the corresponding finger unit in the finger pool 100 is moved. The finger position shift command and the finger number 121 are transmitted to (PU ₁ ,..., PU _N ) so that the position of the finger can be actually adjusted.

FIG. 3 is a detailed block diagram of the finger units PU ₁ ,..., PU _N shown in FIG. 2.

As shown in FIG. 3, the finger units PU ₁ ,..., PU _N include an input buffer 1000, a controller 1100, a sampler 1200, a sign generator 1300, a despreader 1400 and a finger position. Controller 1500.

The input buffer 1000 receives signals received from several antennas per sector in various sectors from the outside of the base station demodulator and stores the signals for one chip period.

At this time, the double buffer structure is used for the input buffer 100, and the signal for the next chip period is stored in the other buffer while the signal for one chip period stored in one buffer is used.

The controller 1100 generates signals controlling the finger units PU ₁ ,..., And PU _N to which the controller 1100 belongs, and performs overall control, and stores the global frame counter 1110, the finger number generator 1120, and the finger setting. Part 1130 is included.

Here, the global frame counter 1110 operates by one clock with a period of one frame to output a corresponding counter value, and the finger number generator 1120 performs one chip interval according to the counter value output from the global frame counter 1110. Generate a finger number 211 to be processed for each clock. For example, if you have 16 clocks on a chip, you can write the lower 4 bits of the counter.

Meanwhile, in the finger setting storage unit 1130, information set for each finger is stored using the finger number 211 generated by the finger number generator 1120 as an address, and each information is stored using the finger number 211 during operation. Reference may be made.

Information set for each finger includes finger activation information 212, a register value 213 of the scrambling code generator, a frame counter 214 for each channel, a control channel channelization code number 215-1, and a data channel channelization code number ( 215-2), sampling point information 216, minimum spreading element 217, start offset 218, sector number 219, and so forth.

Each of the pieces of information is not referenced unless the finger is activated with reference to the finger activation information 212.

The sampler 1200 uses the sector number 219 and the sampling point information 216 referenced by the controller 1100 as addresses in the input buffer 1000 to track chip samples 221 and finger positions to be used for despreading. A half chip shifted sample 222 to be used may be output to the despreader 1400.

The code generator 1300 generates a scrambling code 231 using the register value 213 of the scrambling code generator referenced by the controller 1100, and generates a channel-specific frame counter 214 and a control channel channelization code number 215. -1) and the control channel channelization code 232-1 and the control channel channelization code 232-2 are generated using the data channel channelization code number 215-2 and output to the despreader 1400. .

The despreader 240 uses the scrambling code 231 generated by the code generator 1300 and the channel samples 232-1 and 232-2 in the chip sample 221 output from the input buffer 1000. Compensate the scrambling code 231, compensate for the channelization code 232-1 of the control channel, accumulate and obtain the symbol 103 of the control channel, and also compensate for the channelization code 232-2 of the data channel. And then accumulate to obtain the symbol 104 of the data channel.

At this time, an intermediate cumulative value of the control channel symbol 103 and an intermediate cumulative value of the symbol 104 of the data channel are stored in an arbitrary memory device whose address is the finger number.

In addition, the despreader 1400 compensates for the scrambling code 231 and the channelization code 232-1 of the control channel in the half chip displaced chip sample 222 obtained from the sampler 1100 for finger position tracking. Accumulate to obtain a finger position tracking symbol 105. When using multiple antennas, the accumulation for each antenna is in parallel.

The accumulated control channel symbol 103, data channel symbol 104, and finger position tracking symbol 105 when the accumulated number of chips are the spreading element of the control channel, the minimum spreading element of the data channel 217, and the spreading element of the control channel, respectively. ) And print the finger number tag.

The finger position controller 250 changes the position of the finger by using the finger position shift command and the finger number 121 output from the finger position tracker 120. An example thereof is as follows.

The finger position controller 250 outputs a control signal to the controller 1100 for changing the sampling point information 216 according to the finger position movement command 121 when the sampling point of the finger moves within the chip section.

When the sampling point of the finger needs to move over the chip section, the operation of the finger position controller 250 is as follows.

If the current sampling point is the first sample in the chip section and the command is given to advance one sampling point, the sampling point information 216 is changed so that the sampling point is located at the last sample in the chip section, and the controller 1100 stores the finger setting. Each of the pieces of information stored in the unit 1130 progresses by one chip at a time, and outputs a control signal that allows two chips to proceed at a time.

In addition, if the current sampling point is the last sample in the chip interval and the command to push the sampling point backward or push, the sampling point information 216 is changed to place the sampling point in the first sample of the chip interval, the controller 1100 Outputs a control signal to prevent each information stored in the finger setting storage unit 1130 from progressing once.

Hereinafter, a chip calculation method in a base station demodulator of a CDMA system according to an embodiment of the present invention will be described with reference to FIG. 4.

First, the finger setting storage unit 1130 of the controller 1100 may include the finger activation information 212, the scrambling code number, and the channelization code number 215-1 and 215- inputted from the user through a user interface (not shown). 2), setting contents such as a minimum spreading element 217, a start offset 218, and a sector number 219 are received and stored (S100).

Next, the number 211 of the finger to be processed to the clock in the chip interval is determined, and the finger setting storage unit 1130 refers to the corresponding information using the finger number 211 as an address, and then the information and the global frame counter 1110 In step S110, a finger internal control signal, such as a scrambling code generator register value 213 and a finger frame counter 214, is generated.

Thereafter, a signal received in several sectors is received from the outside of the demodulator and the signal for one chip period is stored in the input buffer 100 (S120).

Among the signals stored in the input buffer 100, the sampler 1200 selects one sample corresponding to the sector number 219 and the sampling point information 216 referenced by the finger setting storage unit 1130 of the controller 1100. At the same time, sampling is performed to select a sample at a half chip position away from the sampling point for finger position control (S130).

Meanwhile, the code generator 1300 uses the scrambling code generator register value 213, the finger frame counter 214, and the channelization code numbers 215-1 and 215-2, which are referred to by the finger setting storage unit 1130. By generating the user's scrambling code (231) and channelization code (231-1, 232-2) (S140).

Next, the despreader 1400 compensates for the scrambling code 231 and the channelization codes 231-1 and 231-2 generated in the step S140 in the sample taken in the step S130 and minimizes the spreading factor ( Accumulate to 217 to generate a control channel symbol 103, a data channel symbol 104, and a finger position tracking symbol 105. In this case, the minimum spreading element 217 and the finger frame counter 214 are used to attach the finger number tag to the accumulated symbols 103, 104 and 105 when the accumulation of each symbol 103, 104 and 105 is completed. It is output to the channel scheduler 110 (S150).

Meanwhile, the channel scheduler 110 schedules and multiplexes the symbols 103, 104, and 105 output from the despreader 1400 of the finger pool 100, and then multiplexes the control channel symbol 103 and the data channel symbol. 104 outputs to the symbol operator 20, and the multiplexed finger position tracking symbol 105 to the finger position tracker 120 (S160).

Next, the finger position tracker 120 tracks the position of the finger using the finger position tracking symbol 105 among the signals multiplexed by the channel scheduler 110 (S170), and the finger units PU ₁ ,..., PU _N. The finger position controller 1500 receives the finger position movement command and the finger number 121 outputted as a result of the position tracking by the finger position tracker 120 and adjusts the actual position of the corresponding finger (S180).

Although the preferred embodiment of the present invention has been exemplified, various modifications to the above-described embodiment are possible to those skilled in the art within the scope of the technical idea of the present invention.

According to the present invention, time efficiency is achieved by performing the role of an independent finger as many as the number of clocks per chip in one device, and increasing the efficiency of the device, and by multiplexing the multiplexed finger outputs output from several devices once again through scheduling. When estimating or combining channels using the output of a finger, one device facilitates processing using time division.

In addition, since the fingers are managed in the form of a pool, the dynamic assignment and dynamic coupling of the fingers is possible.

In addition, the amount of memory required for each finger does not change, but since the part performing the calculation is shared through time division, the complexity per finger is greatly reduced, and a large number of fingers can be integrated.

Claims (14)

A chip computing device included in a base station demodulator of a code division multiple access system, and despreading a signal received through a plurality of antennas for each sector in a plurality of sectors, It is composed of a plurality of finger units for generating a specific symbol for despreading the signal received through the antenna with a minimum spreading element, and time-division independent despreading by the number of clocks per chip, for each user A finger pool capable of dynamically assigning each finger in the finger unit and dynamically combining the fingers; A channel scheduler for multiplexing the specific symbol generated in the finger pool through scheduling, and then outputting by attaching a finger number tag corresponding to the multiplexed symbol; And Finger position tracking unit for outputting a command for moving each position of the finger pool with reference to the signal output from the channel scheduler Chip computing device in the base station demodulator of the code division multiple access system comprising a. The method of claim 1, Each finger unit An input buffer unit for storing a signal received through the antenna; A controller for generating a finger number to be operated at every clock during one chip period, storing setting information necessary for each finger, and performing overall control of the finger unit by providing stored setting information corresponding to the generated finger number; A sampling unit which takes a chip sample and a sample for finger position tracking in the input buffer unit using setting information of the corresponding finger provided by the controller; A code generation unit generating a specific code using setting information of the corresponding finger provided by the control unit; Compensating a code corresponding to the specific code in a sample taken by the sampling apparatus by using the specific code generated by the code generator, generating a corresponding symbol by accumulating the spreading elements of a specific channel and outputting the generated symbol to the channel scheduler. Despreading unit; And Finger position control unit for outputting a control signal for moving the corresponding finger to the control unit according to the finger position movement command output from the finger position tracking unit Chip computing device in the base station demodulator of the code division multiple access system comprising a. The method of claim 2, The controller A global frame counter which operates by one clock with a period of one frame and outputs a corresponding counter value; A finger number generation unit for generating a finger number to be processed for each clock for one chip period according to a counter value output from the global frame counter; And A finger setting storage unit for storing the setting information and providing setting information corresponding to the finger number generated by the finger number generation unit Chip computing device in the base station demodulator of the code division multiple access system comprising a. The method of claim 1, The specific symbol is a control channel symbol, a data channel symbol and a finger position tracking symbol, The multiplexed symbol is a multiplexed control channel symbol, multiplexed channel symbol and multiplexed finger location tracking symbol. A chip computing device in a base station demodulator of a code division multiple access system, characterized in that. The method of claim 4, wherein The base station of the code division multiple access system, wherein the finger position tracking unit outputs a command for moving each position of the plurality of finger units with reference to the multiplexed finger position tracking symbols among the multiplexed symbols output from the channel scheduler. Chip computing device in the demodulator. The method of claim 2, The input buffer unit includes a buffer that stores a received signal for one chip period received through the antenna, The buffer has a double buffer structure in which a received signal for the next chip period is stored while a signal for one chip period is used. A chip computing device in a base station demodulator of a code division multiple access system, characterized in that. The method according to claim 2 or 3, The setting information includes a register value of a scrambling code generator, a frame counter for each channel, a control channel channelization code number, a data channel channelization code number, sampling point information, a minimum spreading element, a start offset, and a sector number. Chip computing device in base station demodulator in code division multiple access system. The method of claim 7, wherein And the sampling unit takes a chip sample and a sample for finger position tracking in the input buffer unit by using the sector number and sampling point information of the configuration information. The method of claim 7, wherein The scrambling code includes a scrambling code, a control channel channelization code, and a data channel channelization code by using a register value of a scrambling code generator, a control channel channelization code number, and a data channel channelization code number among the setting information. And a chip computing device in a base station demodulator of a code division multiple access system. The method of claim 9, The despreading unit Compensating the scrambling code and the control channel channelization code in the chip sample and accumulate as much as the spreading elements of the control channel to generate a control channel symbol, Compensating the scrambling code and the data channel channelization code in the chip sample and accumulates as the minimum spreading factor of the data channel of the configuration information to generate a symbol of the data channel, Compensating a scrambling code and a control channel channelization code in the sample for finger position tracking and accumulating the spreading elements of the control channel to generate a finger position tracking symbol. A chip computing device in a base station demodulator of a code division multiple access system, characterized in that. A chip computing method included in a base station demodulator of a code division multiple access system and despreading a signal received through a plurality of antennas for each sector in a plurality of sectors, the method comprising: a) receiving a signal received from the antenna and storing a signal for one chip period; b) chip sample and finger position among the signals stored in step a) using information set for a particular finger based on the clock generated per chip to time-divided independent despreading by the number of clocks per chip. Taking a sample half chip away from the sampling point for control; c) generating a scrambling code and a channelization code assigned to each finger using the information set for the specific finger; d) compensating and accumulating the scrambling code and the channelization code generated in step c) in the chip sample taken in step b) and a sample half chip away from the sampling point to generate a specific symbol; e) scheduling and multiplexing the generated specific symbols; f) generating a finger position movement command by tracing the position of the finger using the specific multiplexed symbol; And g) dynamically adjusting the position of the finger and dynamically combining the setting information for the finger according to the generated finger position movement command. Chip computing method in a base station demodulator of a code division multiple access system comprising a. The method of claim 11, Before step a), Receiving and storing the setting information required for a finger from a user; And Determining a finger number to be processed according to a clock generated within the chip period, and generating a finger-related internal control signal using setting information corresponding to the determined finger number among the stored setting information. Chip computing method in the base station demodulator of the code division multiple access system further comprising. The method of claim 11, After step d), And attaching a finger number tag to the specific symbol generated in step d) and outputting the finger number tag. Chip computing unit for despreading a signal received through a plurality of antennas for each sector in a plurality of sectors, wherein the chip computing unit A plurality of finger units for generating a control channel symbol, a data channel symbol, and a finger position tracking symbol for despreading the received signal with a minimum spreading element, and for performing time division of independent despreading by the number of clocks per chip. A finger pool capable of dynamically assigning each finger in the finger unit for each user and dynamically combining them; A channel scheduler for multiplexing the control channel symbol, the data channel symbol, and the finger position tracking symbol generated in the plurality of finger units through a scheduling, and then attaching and outputting a finger number tag corresponding to the multiplexed symbol; And Finger position tracking unit for outputting a command for moving each position of the plurality of finger units with reference to the finger position tracking symbols output from the channel scheduler Including; A symbol operator which estimates a channel by selectively using symbols of a control channel and a data channel from a signal that is despread and output from the chip operator and combines signals input through multiple paths; Frame operation unit unit for combining the signal combined by the symbol operation unit in a frame unit to perform transport format combination indicator (TFCI) decoding, feedback information (FBI) decoding, frame synchronization estimation, signal-to-noise ratio estimation, post-combination and secondary deinterleaving operation ; A memory device for storing outputs of the chip operation unit, symbol operation unit, and frame operation unit; A memory device controller for controlling input / output signals between the chip operator, the symbol operator, and the frame operator and the memory; And Host interface for controlling the input and output between the chip operation unit, the symbol operation unit and the frame operation unit and the host The base station demodulator of the wideband code division multiple access system comprising a.