KR20030040861A - Apparatus for Combining Multi-path Signals in the Mobile Station Receiver and its Method - Google Patents

Abstract

PURPOSE: A device of combining multipath signals in a mobile station receiver is provided to set a combining time based on a DL DPCHnom(Down Link Dedicated Physical Channel nominal) defined in an asynchronous WCDMA standard, thereby combining all received multipath signals. CONSTITUTION: A symbol combining device(18) combines signals received through multipath under control of a controller(26). A switching unit(32) handing symbols over from deskewing buffers(fingers 1, 2, and 3) transmits a current symbol to a TPC(Transmitter Power Control) processor(31) if the current symbol is a TPC symbol, then transmits a data symbol, a TFCI(Transport Format Combination Indicator) symbol, and a pilot symbol to a symbol combiner(27). A data switching unit(33) transmits the data symbol to a data processor(28), the TFCI symbol to a TFCI processor(29), and the pilot symbol to a pilot processor(30), under control of a combining time defined by a DL DPCHnom. The data processor(28) transmits the combined data symbol to a channel decoder, and the TFCI processor(29) transmits the combined TFCI symbol to a TFCI decoder. The pilot processor(30) measures a downlink SIR(Sustained Information Rate), and transmits information to generate TPC bits to a modulator(23).

Description

Apparatus for Combining Multi-path Signals in the Mobile Station Receiver and its Method

The present invention provides an apparatus and method for combining a plurality of multipath signals to an optimal condition by a mobile station receiver in an asynchronous wideband code division multiple access (WCDMA) mobile communication system, and executing the method. The present invention relates to a computer-readable recording medium having recorded thereon a program.

The greatest advantage is that the direct sequence spread spectrum signal can combine all of the multipath signals on the wireless channel. Therefore, since the forward and reverse signals of the WCDMA system are also spread spectrum signals, the multipath signals can be combined.

The spread signal transmitted from the base station of the WCDMA system is received by the mobile station through a plurality of paths, of which the data symbol of the first received signal is combined with the received signals arriving after the signal for a predetermined time. It must be stored in a buffer in the receiver. The buffer used at this time is called a deskew buffer, and the difference between the time at which the signal is received and the time at which the signal is combined is called a deskew depth.

In the asynchronous WCDMA system, the power of the downlink is controlled during power control and soft handover of the uplink according to the time of combining the multipath signals received by the mobile station. Control performance can vary greatly.

1 is an explanatory diagram showing a conventional combining method based on a signal path that first arrives at a time for combining multipath signals received by a mobile station, and FIG. 2 shows a combination of multipath signals received by a mobile station. It is explanatory drawing which shows the deskewing depth in the conventional method based on the signal path which arrives first at the time of inning.

In Fig. 1, reference numeral 2A denotes an interval between a base station transmission signal and a signal path arrival point first arriving at a mobile station, " 2B " And " 2C " represents the interval between the base station transmit signal and the received signal path arrival point arriving three times in mobile station.

Further, reference numeral "4" denotes a difference between a signal first arriving at the mobile station and a signal demodulated after demodulation, which is a reference and nominal deskewing depth.

As shown in Fig. 1, in the conventional method, the time for combining the multipath signals received by the mobile station is set based on the time when the first signal arrives. That is, on the basis of the reception time of the signal arriving first, it is combined with the second and third reception signals at the time of the preset Nominal Deskewing Depth 4. Thus, multipath signals arriving after the first arriving signal are stored in the dequeuing buffer for a time shorter than the reference dequeuing depth. In addition, the reference dequeuing depth 4 is set to be larger than the delay spread of the channel so that the most recently arrived signal among the multipath signals can be combined.

On the other hand, since each base station operates asynchronously in an asynchronous WCDMA system, according to the 3GPP standard, each first received signal received from two mobile stations and two base stations in a soft handover can be spread up to 296 chips. Therefore, as shown in Fig. 2, in order to combine the signals received from the two base stations (cells A to B), the nominal deskewing depth must be greater than 296 chips and up to delay spread. If you consider, it should be larger than 296 chips.

However, when the reference deskew depth is large as described above, an additional one slot power control delay occurs in the steady state (one base station in talks with the mobile station).

3 is an explanatory diagram illustrating a problem in reverse power control in a conventional method based on a signal path that first arrives at a time for combining multipath signals received at a mobile station, wherein the reference deskew depth is described above; As explained above, larger than 296 chips is a direct cause of up-link power capacity decay.

In Fig. 3, reference numeral 5 denotes a chip value up to the point where a transmitter power control (TPC) signal exists, and reference numeral 6 denotes a chip value up to the mobile station transmission signal path.

Further, reference numeral 7 denotes a TPC bit received from the mobile station, reference numeral 8 denotes a TPC bit start portion of the first reverse link slot, and reference numeral 9 denotes a pilot bit start portion of the first reverse link slot. .

Also, reference numeral 10 denotes a pilot bit start portion of the next slot.

One frame of an asynchronous WCDMA system consists of 15 slots, and one slot is 2560 chips long. Forward and reverse power control is performed in units of one slot. The combining time of the downlinked signal depends on the power control of the reverse link.

As shown in Fig. 3, in the WCDMA system, the TPC: (Transmitter Power Control) bit transmitted from the base station to the mobile station for power control of the reverse link is always 512 chips from the slot boundary of the forward link. In (5), in the normal state, the slot boundary of the mobile station transmission signal always exists after about 1024 chips (1024 ± a) at the slot boundary of the signal received by the mobile station (6).

According to the specification, the mobile station must control the transmit power from the pilot start portion 9 of the first reverse link (mobile station transmit) slot after receiving the TPC bit (7), the power control bit, on the forward link (received mobile station). . However, as described above, when the reference deskew depth is larger than 296 chips, the transmit power is not controlled at the pilot bit start portion 9 of the immediately adjacent slot due to an RF processing delay or the like, Since the transmit power is controlled at the pilot bit start portion 10, an additional one slot reverse link power control delay occurs, resulting in a very low performance of the reverse link.

4 is an explanatory diagram illustrating a problem in handover in the conventional method based on the signal path that first arrives at the time of combining the multipath signals received at the mobile station.

As shown in FIG. 4, when the reference deskew depth is smaller than 296 chips, there is a problem in that a call may be disconnected because soft signals may not combine both signals received from two base stations.

The present invention has been proposed to solve the above problems, and when the mobile station receiver sets the combining time of the multipath signals transmitted from the base station, the first arrival path arrives first. Multipath signal combiner for optimally combining the multipath signals based on DL Downlink Dedicated Physical Channel nominal (DL DPCH _nom ) time defined in the asynchronous WCDMA standard (3GPP TS25.402). It is an object of the present invention to provide a computer-readable recording medium having recorded thereon an apparatus, a method thereof, and a program for executing the method.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an explanatory diagram showing a conventional combining method based on a signal path that first arrives at a time for combining multipath signals received at a mobile station.

2 is an explanatory diagram showing a depth of dequeuing in a conventional method based on a signal path that first arrives at a time for combining multipath signals received at a mobile station;

3 is an explanatory diagram illustrating a problem in reverse power control in a conventional method based on a signal path that first arrives at a time for combining multipath signals received at a mobile station;

4 is an explanatory diagram illustrating a problem in handover in a conventional method based on a signal path that first arrives at a time for combining multipath signals received at a mobile station;

FIG. 5 is a diagram illustrating an embodiment of a dequeuing depth when the combining time according to the present invention is based on the DL DPCH _nom time defined in the 3GPP standard. FIG.

6 is a diagram illustrating an embodiment of a combining method based on a DL DPCH _nom time defined in the 3GPP standard according to the present invention.

FIG. 7 illustrates one embodiment demonstrating that no additional uplink power delay occurs in accordance with the present invention. FIG.

8 is a diagram illustrating an embodiment of an asynchronous WCDMA mobile station receiver to which the present invention is applied.

FIG. 9 is a diagram illustrating an embodiment of a read / write operation of a deskew buffer at an arbitrary time T ₁ according to the present invention. FIG.

FIG. 10 is an explanatory diagram illustrating a read / write operation of a dequeuing buffer at T ₂ , which is a time after a symbol interval from T _{1, which} is the time of FIG. 9.

11 is a detailed block diagram of an embodiment of a symbol combining apparatus according to the present invention.

In order to achieve the above object, the present invention provides a control method for generating a control signal based on a symbol combining time set based on a DL DPCH _nom (Down Link Dedicated Physical Channel nominal) in a multipath signal combining apparatus in a mobile station receiver. Way; A plurality of storage means for storing the demodulated symbols of each of the multipath signals received at the mobile station receiver according to the control signal until the symbol combining time; Switching means for separating the symbols stored in the storage means according to the symbol combining time; Symbol combining means for combining data symbols, TFCI symbols, and pilot symbols other than the TPC symbols switched by the switching means in a corresponding symbol combining time according to the control signal; TPC processing means for processing a switched TPC symbol in the switching means; Data processing means for processing the data symbols combined by the symbol combining means; TFCI processing means for processing the TFCI symbols combined by the symbol combining means; And pilot processing means for generating a forward power control bit (TPC) by measuring a forward signal-to-interface ratio (SIR) of the pilot symbols among the symbols combined by the symbol combining means. .

In addition, the present invention provides a multi-path signal combining method in a mobile station receiver, comprising: a first step of setting a combining time based on DL Downlink Dedicated Physical Channel nominal ( _DP DPCH _nom ); Storing the demodulated symbols of each of the multipath received signals in a dequeuing buffer until the combining time; And combining the symbols stored in the deskew buffer at a symbol combining time.

In addition, the present invention provides a multipath signal combining apparatus of a mobile station receiver having a processor for combining multipath signals in a mobile station receiver based on DL Downlink Dedicated Physical Channel nominal (DL DPCH _nom ). A first function of setting a time; A second function of storing demodulated symbols of each of the multipath received signals in a dequeuing buffer until the combining time; And a computer-readable recording medium having recorded thereon a program for realizing a third function of combining the symbols stored in the deskew buffer at the symbol combining time.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 5 is a diagram illustrating an embodiment of a deskew depth when the combining time according to the present invention is based on a DL DPCH _nom time defined in the 3GPP standard.

In FIG. 5, reference numeral “D” is a delay spread.

Typically, the DL DPCH _nom time is determined based on the reception time of the mobile station, and the timing measurment of the neighboring base station for preparing the handover is performed as a relative difference with respect to the DL DPCH _nom time. That is, according to the asynchronous WCDMA standard 3GPP TS25.402, DL DPCH _nom is defined as "TUETX-To", where TUETX is the transmission time of the mobile station and To is 1024 chips. Therefore, the frame boundary of the DL DPCH _nom is always 1024 chips ahead of the mobile station transmission frame boundary.

According to the 3GPP TS25.402 standard, the DL DPCH _nom is set by the arrival time of the first arrival path that arrives first of the dedicated physical channel (DPCH) of the forward link, which is a communication channel of an asynchronous WCDMA system. After setting, when there is a large difference between the first signal path and the DL DPCH _nom due to the movement of a mobile station or a cell change occurring during soft handover, the DL DPCH _nom time is gradually matched to the first path. Time adjustment According to the TS25.133 standard, the DL DPCH _nom is adjusted as the path of arrival arrives first, but not more than 1/4 chip in 200 msec.

As described above, a user equipment (UE) uses DL DPCH _nom as a criterion for adjusting a transmission time of an adjacent base station for handover, and according to the TS25.133 standard, a user equipment (UE) from a handover target base station in a soft handover situation. The first signal path received does not exceed 148 chips from the DL DPCH _nom . In other words, when the maximum delay spread is defined as D, multipath signal components received from multiple active cells in any environment are defined as "(148 + D) x 2". Will be placed within.

In general, the maximum delay spread is less than 100 chips, considering that the chip rate of the WCDMA system is 3.84 Mcps, so that multipath signal components received from several active cells in the WCDMA system are in any case within 512 chips. As a result, all the multipath signals can be combined without missing a buffer size of about 512 chips.

Therefore, according to the present invention, the method of setting the DL DPCH _nom time defined in the 3GPP standard as a reference of the combining time is not required for any additional uplink power control delay in the normal state. All multipath signal components coming from the active cell can be combined, and in any handover environment, the first arriving signals received from several active cells do not exceed 148 chips from the DL DPCH _nom .

Accordingly, in the present invention, as shown in FIG. 5, the combining time is set after the (148 + D) chip based on the DL DPCH _nom time and the maximum deskew depth is 2 × (148 + D) chips as shown in FIG. Since it is set larger, the multipath signal components coming from the active cell can be combined in any handover environment. In the present invention, the difference between the DL DPCH _nom and the combining time is defined as the reference deskew depth. In general, given the 3.84 Mcps chip rate, the maximum delay spread does not exceed 100 chips, so the size of each finger's deskew buffer is greater than 496 chips, and the reference deskew depth is set to {148+. By setting D} larger and smaller than {Maximum Deskew Depth- (148 + D)}, all multipath components coming from all active cells in handover can be combined without missing. As an example, assuming that the reference deskew depth is 256 chips and the maximum deskew depth is 512 chips, all of the above conditions may be satisfied.

6 is a diagram illustrating an embodiment of a combining method based on a DL DPCH _nom time defined in the 3GPP standard according to the present invention.

In general, the frame boundary of the DL DPCH _nom 12 is separated by a chip from the frame 1A boundary of the first arriving signal (path 1). Here, a may be up to 148 chips during soft handover, but becomes smaller than 1.5 chips in the normal state (the state where there is one active cell). It can be seen that the frame boundary of the combined signal is behind the DL DPCH _nom frame boundary by a reference deskew depth. In either case, it can be seen that the received signals from the active cells are placed within the maximum deskew depth window and can be combined.

FIG. 7 is an exemplary illustration showing that no additional uplink power delay occurs in accordance with the present invention.

In the present invention, it is assumed that the reference deskew depth is 256 chips, but this is only a preferred embodiment for convenience of description and is not intended to limit the reference deskew depth.

In FIG. 7, reference numeral 13 is a combined TPC bit, and reference numeral “a” is a difference between the first arriving signal and the DL DPCH _nom slot boundary as in FIG. 6.

As shown in FIG. 7, it can be seen that there is about 256 chips until the reverse power is adjusted using the combined TPC bit 13. Therefore, considering the chip speed of 3.84 Mcps, 256 chips corresponds to 66.7 msec (micro second). Since this time is sufficient time for the mobile station to adjust the power of the reverse link, no additional one slot reverse power control delay occurs in the normal state when the combining method according to the present invention is used.

8 is a diagram illustrating an embodiment of an asynchronous WCDMA mobile station receiver to which the present invention is applied.

As shown in FIG. 8, the asynchronous WCDMA mobile station receiving apparatus includes a radio frequency / intermediate frequency (RF / IF) signal processor 16, fingers 17A, 17B, and 17N, a symbol combining apparatus 18, and a decoding block ( 19), cell / multipath searcher 20, modulator 24, channel encoder 25, and control unit 26.

Referring to Figure 8, it will be described in more detail the operation of each component.

The terminal RF / IF signal processor 16 amplifies and down-processes the signals input to the terminal (mobile station), and the cell / multipath searcher 20 searches for a path of signals from the cell. That is, when power is initially applied to the mobile station, the cell / multipath searcher 20 plays a role of acquiring synchronization of a base station signal currently received by the mobile station, and then continues to search for multiple paths. The searched multipath signal is sent to the control unit 26, which uses this information to newly assign or reassign a finger for demodulation of the multipath signal.

The signals output from the signal processing unit 16 are demodulated by the fingers 17A, 17B,... 17N under the control of the control unit 26, and the symbol combining device 18 is a combine determined based on the DL DPCH _nom time. The demodulated symbols coming from the fingers 17A, 17B, ... 17N are combined by receiving the control signal 21 from the control unit 26 generating the control clock according to the inning time.

The modulator 24 receives the power control signals 22 extracted from the symbol combining device 18 and modulates the symbols received at the channel encoder 25 to the corresponding power level, and the channel encoder 25 is input to the user interface. After the signals are encoded for processing, they are sent to a modulator 24 to modulate the encoded signal.

The decoding block 19 decodes the output signals of the symbol combining device 18 to output the decoded signal to the user interface, and the controller 26 controls the fingers 17A, 17B, ... 17N and the symbol combining device. By controlling (18), it serves to control the combining time proposed in the present invention.

Each finger 17A, 17B, 17N performs despreading and demodulation on each multipath signal, and the demodulated signal is stored in a deskew buffer. The deskew buffer may be located within each finger 17A, 17B, 17N, or may be located inside the symbol combining device 18, and the location of the deskewing buffer may be within the scope of the present invention. As a preferred embodiment, it is assumed that there is a deskew buffer inside each finger.

The data symbols stored in the dequeuing buffer are controlled by the combining time determined based on the DL DPCH _nom time output from the controller 26 and input to the symbol combining device 18.

The symbol combining device 18 combines the signal symbols received from each deskew buffer, extracts the TPC bits, and transmits the power control signal 22 to the modulator 24 for power control of the reverse link. In addition, the pilot bits of the forward link are extracted to measure the sustained information rate (SIR) of the forward link, and then information 23 for generating the TPC bits of the reverse link is sent to the modulator 24 based on the measured SIR. A more detailed description thereof will be described later.

FIG. 9 is an exemplary diagram illustrating a read / write operation of a dequeuing buffer at an arbitrary time T ₁ according to the present invention. FIG.

As shown in FIG. 9, signals stored in the dequeuing buffer of each finger are controlled by a combining time determined based on a DL DPCH _nom time at an arbitrary time T ₁ and input to the symbol combining device 18. Here, time T ₁ is an arbitrary time that becomes a symbol boundary when DL DPCH _nom is expressed in symbol units.

In FIG. 9, finger 1 performs demodulation on the first arriving signal, finger 2 performs demodulation on the second arriving signal, and finger 3 performs demodulation on the third arriving signal. . The symbols of the demodulated signal in the demodulation block are sequentially stored in the dequeuing buffer of each finger according to the arrival time. At this time, the dequeuing buffer _symbolizes the symbol of the demodulation signal stored at the symbol pointer address before the reference dequeuing depth from the symbol pointer designated by the symbol pointer placed on the symbol boundary of DL DPCH _nom at the current time T ₁ . Input to the combining device 18 is carried out.

In the present invention, as shown in FIG. 9, the size of the deskew buffer is assumed to be 16 symbols, and the reference deskew depth is assumed to be 8 symbols. It can be seen that the symbol positions of the dequeuing buffers designated by the DL DPCH _nom symbol pointers are the same at time T ₁ . Accordingly, the symbols input from the respective dequeuing buffers to the symbol combining device 18 at any time T ₁ are always input with the same symbols. That is, it can be seen that a symbol input to the symbol combining device 18 from each deskew buffer at time T ₁ is the fourth symbol.

FIG. 10 is a diagram illustrating an embodiment of a read / write operation of a dequeuing buffer at time T ₂ after a symbol period from time T ₁ according to the present invention.

As shown in FIG. 10, it can be seen that the symbol position of each dequeuing buffer designated by the DL DPCH _nom symbol pointer in T ₂ points one symbol after the position in T ₁ of FIG. 9. Accordingly, it can be seen that at time T ₂ , the next symbol of the symbol output at T ₁ , that is, the third symbol, is output.

As described above, each dequeuing buffer of the mobile station receiver inputs data symbols stored in the symbol corresponding to the symbol dequeuing depth of the DL DPCH _nom to the symbol combining device 18.

11 is a detailed block diagram of an embodiment of a symbol combining apparatus according to the present invention.

As shown in FIG. 11, the symbol combining apparatus 18 according to the present invention includes a switching unit 32, a symbol combiner 27, a data switching unit 33, a data processing unit 28, and a TFCI (Trasnport). Format Combination Indicator) processing unit 29, PILOT processing unit 30, and TPC processing unit 31.

The symbol combining device 18 combines the symbols of the signals received in the multipath under the control of the controller 26. This will be described in more detail as follows.

The switching unit 32, which receives the symbols from the dequeuing buffers (Finger 1, Finger 2, and Finger 3), sends the current symbol to the TPC processing unit 31 when the current symbol is a TPC symbol. If so, send it to the symbol combiner 27.

The data switching unit 33 receives the symbol of the symbol combiner 27 from the data processing unit 28 and the TFCI symbol when the data symbol is controlled by the combining time determined by the DL DPCH _nom output from the control unit 26. In the case of TFCI processing unit 29, and in the case of a pilot symbol is sent to the pilot processing means 30.

The data processor 28 sends the combined data symbol to the channel decoder, and the TFCI processor 29 sends the combined TFCI symbol to the TFCI decoder.

The pilot processor 30 measures the SIR of the forward link using the combined pilot bits, and then sends information for generating TPC bits for power control of the forward link to the modulator 23 based on the measured SIR of the forward link.

On the other hand, the TPC processing unit 31 is controlled by the combining time determined by the DL DPCH _nom output from the control unit 26 when the TPC symbol input from each finger is a symbol received from any one cell (handover In case of no hand situation, power control information for power control of reverse link is generated by using the combined value and sent to modulator. In case of handover situation, each finger can demodulate signals received from different base stations. In this case, the TPC processing unit 31 combines the TPC bits received from the same base station through different paths, but separately processes the TPC bits received from the other base stations without combining them. For example, in a handover situation, when finger 1 and finger 2 demodulate different path signals from base station A, and finger 3 demodulates a signal from base station B, the TPC processing unit 31 is finger 1. And combines the TPC bits coming from Finger 2 and adjusts the power of the reverse link using the algorithm defined in the 3GPP TS25.214 specification using this and the TPC bits coming from Finger 3 (uncombined TPC bits). .

That is, the symbol combining device 18 under the control of the control unit 26 which outputs a control signal according to the combining time determined by the DL DPCH _nom presented in the present invention combines the multipath received signals under optimal conditions. To transmit to the base station.

As described above, the method of the present invention may be implemented as a program and stored in a recording medium (CD-ROM, RAM, ROM, floppy disk, hard disk, magneto-optical disk, etc.) in a computer-readable form.

The present invention described above has been exemplified as a mobile station receiver of an asynchronous wideband code division scheme as a preferred embodiment. However, the scope of the present invention is not limited to the drawings and examples shown herein, but various substitutions, modifications, and changes can be made without departing from the technical spirit of the present invention. It will be apparent to those who have knowledge.

As described above, when the mobile station receiver of the asynchronous wideband code division scheme combines multipath signals, the asynchronous WCDMA does not set the combining time based on the signal path that arrives first. By setting the DL DPCH _nom defined in the standard (3GPP TS25.402) as a reference, it is possible to combine received multipath signals without missing, no power delay of the reverse link, and loss of data on the forward link during soft handover. There is no effect.

Claims (12)

A multipath signal combining apparatus in a mobile station receiver, Control means for generating a control signal according to a symbol combining time set on the basis of DL DPCH _nom (Down Link Dedicated Physical Channel nominal); A plurality of storage means for storing the demodulated symbols of each of the multipath signals received at the mobile station receiver according to the control signal until the symbol combining time; Switching means for separating the symbols stored in the storage means according to the symbol combining time; Symbol combining means for combining data symbols other than TPC (Transmitter Power Control) symbols, Transport Format Combination Indicator (TFCI) symbols, and pilot symbols according to the control signal at a corresponding symbol combining time. ; TPC processing means for processing the TPC symbol switched in the switching means; Data processing means for processing the data symbols combined by the symbol combining means; TFCI processing means for processing the TFCI symbols combined by the symbol combining means; And Pilot processing means for generating a forward power control bit (TPC) by measuring a forward signal-to-interface ratio (SIR) of the pilot symbols among the symbols combined by the symbol combining means. Multipath signal combining apparatus in a mobile station receiver comprising a. The method of claim 1, The plurality of storage means, Symbols stored in at least one finger and stored for each symbol demodulated by the at least one finger until the symbol combining time, and then stored in accordance with a read address control signal of the control means And a plurality of dequeuing buffers for outputting the combining means to combine the symbols at the symbol combining time of the multipath signal combining apparatus. The method according to claim 1 or 2, The TPC processing means, When the TPC symbol input from each finger at the symbol combining time is a symbol received from any one cell (if not in a handover situation), all are combined and power control of the reverse link using the combined value is performed. Apparatus for multipath signal combining in a mobile station receiver, characterized in that for transmitting the power control information for the modulator. The method of claim 3, wherein The TPC processing means, In case of a handover situation, that is, when each finger demodulates a signal received from different base stations, the TPC bits received through different paths from the same base station are combined, but the TPC bits received from different base stations are And multi-path signal combining apparatus for mobile station receiver to generate and transmit power control information for power control of reverse link without processing. The method of claim 2, The deskew buffer, A substantially multipath signal combining apparatus in a mobile station receiver, characterized in that it is a circular buffer. A multipath signal combining method in a mobile station receiver, A first step of setting a combining time based on a DL DPCH _nom (Down Link Dedicated Physical Channel nominal); Storing the demodulated symbols of each of the multipath received signals in a dequeuing buffer until the combining time; And Combining the symbols stored in the deskew buffer at a symbol combining time; And a multipath signal combining method in a mobile station receiver. The method of claim 6, The third step, The switching unit transmits the TPC symbol to the TPC processor when the output symbol of the deskew buffer is a transmitter power control (TPC) symbol, and the data symbol and the pilot symbol when the data, pilot, or trasport format combination indicator (TFCI) symbol is used. Transmitting a TFCI symbol to a symbol combiner; And A fifth step in which the TPC processor combines the TPC symbols at a symbol combining time, and a symbol combiner combines the data symbols, the pilot symbols, and the TFCI symbol at a corresponding symbol combining time; And a multipath signal combining method in a mobile station receiver. The method of claim 7, wherein A sixth step of transmitting, after the third step, the data switching unit transmits the combined data symbols to the data processing unit, the TFCI symbol to the TFCI processing unit, and the combined pilot symbols to the pilot processing unit; And A seventh step of transmitting the combined data symbol to a channel decoder by the data processor; An eighth step of transmitting the TFCI symbol combined with the TFCI to a TFCI decoder; And The pilot processor measures the signal-to-interface ratio (SIR) of the forward link using the combined pilot bits, and then transmits TPC information to a modulator for generating a TPC for power control of the forward link based on the pilot bit. 9th step And a multipath signal combining method in a mobile station receiver. The method according to any one of claims 6 to 8, The combining time is, And maintaining a nominal deskewing depth that is always a difference from the DL DPCH _nom time. According to claim 6 to 8, The DL DPCH _nom time is, And a time delayed by an arbitrary time from the DL DPCH _nom time can be replaced with a reference time. The method according to any one of claims 6 to 8, The DL DPCH _nom time is, And a time delay time delayed by the root raised cosine (RRC) filter delay from the DL DPCH _nom time to a reference time. In order to combine the multipath signal at the mobile station receiver, the multipath signal combining apparatus of the mobile station receiver having a processor, A first function of setting a combining time on the basis of DL DPCH _nom (Down Link Dedicated Physical Channel nominal); A second function of storing demodulated symbols of each of the multipath received signals in a dequeuing buffer until the combining time; And A third function of combining the symbols stored in the deskew buffer at a corresponding symbol combining time A computer-readable recording medium having recorded thereon a program for realizing this.