KR100572675B1 - Rake receiver and the method with finger equipment and the method using auto-interference cancellation technique - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to a finger device using magnetic interference cancellation, a method thereof, and a rake receiving device using the same.

2. The technical problem to be solved by the invention

The present invention allocates received signals transmitted through multiple paths in parallel to a plurality of fingers, and removes magnetic interference caused by signals assigned to fingers other than itself from the received signals assigned to each finger. It is an object of the present invention to provide a finger device using magnetic interference cancellation and a method thereof, a rake receiving device using the same, and a computer readable recording medium storing the method and a program for implementing the methods.

3. Summary of the Solution of the Invention

The invention provides a rake receiving apparatus using magnetic interference cancellation, comprising: search means for obtaining a starting point of a spreading code for each finger means from a received signal received through a multi-path and transmitting the same to the respective finger means; By using the starting point of the spreading code transmitted from the searching means, after removing the magnetic interference by the signal assigned to the finger means other than itself from the received signal, the predetermined signal for demodulating the received signal from which the magnetic interference has been removed A number of said finger means; And synthesizing means for receiving the demodulated reception signal from which the magnetic interference is removed from each of the predetermined number of finger means, and synthesizing the received signals.

4. Important uses of the invention

The invention is used in rake receivers and the like.

CDMA system, rake receiver, magnetic interference, finger, delay signal,

Description

Finger apparatus and method thereof using magnetic interference cancellation and rake receiving apparatus and method using same {Rake receiver and the method with finger equipment and the method using auto-interference cancellation technique}             

1 is a diagram illustrating a configuration of a conventional RAKE receiver.

2 is an explanatory diagram for a multipath signal and a reception signal in a conventional rake receiver.

3A to 3C are diagrams illustrating a finger device using magnetic interference cancellation and a method thereof, and a rake receiving device using the same and a method thereof according to the present invention.

4 is an explanatory diagram of a magnetic interference cancellation process in a first finger according to the present invention.

5A and 5B are explanatory diagrams for the performance of the rake receiving device according to the present invention;

* Explanation of symbols on the main parts of the drawing

301: searcher 302 to 304: finger

305: synthesizer 306: time delay

307, 311, 316: Despreader 308, 312, 317: Detector

309, 313: diffuser 310, 314, 318: finger code generator

315: subtractor

The present invention relates to a finger device using magnetic interference cancellation and a method thereof, and a rake receiving device using the same, and more particularly, to assign a received signal transmitted through multiple paths in parallel to a plurality of fingers, respectively Finger apparatus and method using magnetic interference cancellation, and a rake receiving apparatus using the same to improve the reception performance by removing the magnetic interference by the signal assigned to the finger other than itself from the received signal assigned to him from the finger of A computer-readable recording medium having recorded thereon a method and a program for implementing the methods.

1 is a diagram illustrating a configuration of a conventional RAKE receiver.

A signal received in a code division multiple access (CDMA) mobile communication using a direct spreading method is converted into a digital signal in an analog / digital (A / D) converter and then synchronized in the searcher 101 for a pseudo noise (PN) code. Will be

In searcher 101, a correlation value between a spreading code of a received signal and a spreading code of a receiving end is obtained to find a sync, and a spreading code sync signal having a signal larger than a reference value is assigned to each finger 102 to 104. FIG. .

According to the magnitude of the correlation value, the spreading code generation signal assigned to each of the fingers 102 to 104 is demodulated by despreading with the received signal. Each finger 102 to 104 demodulates with a different delay time, and the demodulated signal is synthesized by the synthesizer 105 and then sent to the next signal processing stage.

2 is an explanatory diagram for a multipath signal and a reception signal in a conventional rake receiver.

As shown in the figure, the received signal in the mobile communication is received as the sum of the delay signals of the multipath. In the searcher 101, the signal of each path is separated by the correlation value and the sync point of the spreading code is assigned to the finger. .

The spreading code sync point of the signal having the largest correlation value (transmitted signal) is assigned to the first finger 102, and the sync point of the second correlation value (delayed signal 1) is assigned to the second finger 103 and the third correlation value. The synchronization point of the (delay signal 2) is assigned to the third finger 104.

The received signal is despread by the spreading code of the spreading code generator in the despreader of each finger, and the despreaded signal is integrated by the spreading length in the detector to obtain the received signal. It is synthesized and becomes the final signal.

As described above, obtaining the output signal as the sum of the signals passing through the multipath is because the reception signal can be obtained more efficiently than receiving the signal passing through the single path.

Hereinafter, the problem of the conventional rake receiver, as follows.

The received signal is demodulated by the spread code sync point assigned to the finger. The signal demodulated by the first finger 102 is demodulated by the spread code sync point as shown in FIG. Since the two signals are mixed, the first finger signal includes an interference signal of a signal allocated to the second finger 103 and the third finger 104. Meanwhile, the second finger 103 and the third finger 104 also demodulate including the interference signal like the first finger 102.

For example, if the signal allocated to the second finger 103 is delayed by two chips than the first finger 102 and the reception strength is 1/2 as shown in FIG. 2, the second finger 103 is The signal assigned to the first finger 102 is significantly interfered with, and the third finger 104 is also interfered.

In addition, the first finger 102 is also interfered by the signal assigned to the second finger 103 and is also interfered by the third finger 104 although small. This is because if the delay time of 1/2 chip or more occurs, the searcher 101 finds a synchronization signal by recognizing the independent signal with the magnitude of the correlation value.

As described above, in the conventional rake receiver, since the signals allocated to each finger are demodulated to process the signals, the interference caused by the delayed signals assigned to the respective fingers is not removed from the fingers and the performance of the signals is degraded. There is a problem in that the signal is delayed, especially when the signal has a strong delay characteristic (that is, when the strength of the signal assigned to each finger is similar), there is a problem that includes a greater interference.

In addition, the conventional rake receiver, as shown in Figure 2, is interfered by the delay signal by the multi-path, which is impossible to separate the delay signal exactly even when using the rake receiver, multi-path When synthesizing the signal passing through, there was a problem that the reception quality is reduced by interference.

The present invention has been proposed to solve the above problems, and a finger device and a method using a magnetic interference cancellation to remove the magnetic interference by a signal assigned to a finger other than itself from the received signal assigned to the finger And a computer readable recording medium having recorded thereon a program for realizing the above method.

In addition, the present invention, the received signal transmitted through the multi-path is allocated in parallel to a plurality of fingers, and the magnetic interference by signals assigned to fingers other than itself in the received signal assigned to each of each finger to remove Another object of the present invention is to provide a rake receiving apparatus using magnetic interference cancellation, a method thereof, and a computer-readable recording medium having recorded thereon a program for realizing the method.

As described above, in the present invention, assuming that the rake receiver is composed of three fingers, the first finger eliminates interference caused by signals allocated to the second and third fingers from the signal demodulated, and in the same manner. The second finger eliminates interference by signals assigned to the first and third fingers from the demodulated signal, and the third finger eliminates interference by signals assigned to the first and second fingers from the demodulated signal. It is an object of the present invention to provide a finger device using magnetic interference elimination, a method thereof, a lake receiver using the same, and a computer readable recording medium storing the method and a program for implementing the methods.

In the rake receiving apparatus of the present invention for achieving the above another object, in the rake receiving apparatus using the magnetic interference cancellation, the starting point of the spreading code for each finger means from the received signal received through the multi-path Search means for delivering to finger means of the device; By using the starting point of the spreading code transmitted from the searching means, after removing the magnetic interference by the signal assigned to the finger means other than itself from the received signal, the predetermined signal for demodulating the received signal from which the magnetic interference has been removed A number of said finger means; And synthesizing means for receiving a demodulated received signal from which magnetic interference has been removed from each of the predetermined number of finger means, and synthesizing the received signals.

In addition, the rake receiving method of the present invention, in the rake receiving method applied to the rake receiving apparatus using the magnetic interference cancellation, receiving a signal transmitted through the multi-path, and spreading code for each finger means from the received signal Obtaining a starting point of the first step of distributing to each finger means and delivering the first step; A second step of each of the finger means demodulating the received signal from which the magnetic interference has been removed after removing the magnetic interference caused by a signal assigned to other finger means other than itself from the distributed and received signal; And a third step of receiving the received and demodulated demodulated signals from the respective finger means, and synthesizing the received signals and restoring the received signals.

In addition, the present invention, in order to eliminate the magnetic interference, by receiving a signal transmitted through the multi-path to the rake receiving apparatus equipped with a processor, after obtaining the starting point of the spreading code for each finger means from the received signal A first function of dispensing and delivering to each finger means; A second function of each of the finger means for demodulating the received signal from which the magnetic interference has been removed after removing the magnetic interference caused by a signal assigned to other finger means other than itself from the distributed and received signal; And a computer-readable recording medium having recorded thereon a program for realizing a third function of receiving the magnetic interference-removed and demodulated received signals from the respective finger means and synthesizing and restoring the received signals. .

On the other hand, the finger device of the present invention for achieving the above object, the finger device using the magnetic interference cancellation, Time delay means for delaying the received signal received through the multi-path by a predetermined time; Spreading code generating means for generating a spreading code in accordance with a start point of the spreading code obtained from the received signal; Despreading the received signal using a spreading code for a finger device other than itself generated by the spreading code generating means, detecting and demodulating the despreaded signal, and demodulating the demodulated signal. Interfering signal generating means for spreading using a spreading code for a finger device other than the one, and generating a magnetic interference signal by a received signal assigned to a finger device other than itself; Subtraction means for removing a magnetic interference signal generated by the interference signal generating means from a time delayed received signal transmitted from the time delay means; Despreading means for despreading a received signal from which the self-interference signal has been removed by the subtracting means by using a spreading code for itself generated by the spreading code generating means; And detection means for detecting and demodulating the signal despread by the despreading means.

In addition, the finger method of the present invention includes a finger method applied to a finger device using magnetic interference cancellation, comprising: a first step of time-delaying a received signal transmitted through a multipath by a predetermined time; Despreading the received signal using a spreading code for a finger device other than itself according to the starting point of the spreading code obtained from the received signal, demodulating the despreaded signal, and demodulating the demodulated signal. A second step of spreading using the spreading code; A third step of subtracting the spread signal from the time delayed received signal to remove magnetic interference by a signal assigned to the other finger device; And a fourth step of despreading the received signal from which the magnetic interference has been removed using a spreading code for the self signal and demodulating the despread signal.

In addition, the present invention, in order to eliminate the magnetic interference, the finger device having a processor, comprising: a first function for time-delaying a received signal transmitted through a multi-path by a predetermined time; Despreading the received signal using a spreading code for a finger device other than itself according to the starting point of the spreading code obtained from the received signal, demodulating the despreaded signal, and demodulating the demodulated signal. A second function of spreading by using the spreading code; A third function of subtracting the spread signal from the time delayed received signal to remove magnetic interference by a signal assigned to the other finger device; And a computer-readable recording medium storing a program for realizing a fourth function of despreading the received signal from which the magnetic interference has been removed using a spreading code for itself and demodulating the despread signal. .

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

3A to 3C illustrate a finger device using magnetic interference cancellation and a method thereof, and a rake receiving device using the same and an embodiment thereof. Specifically, FIG. 3A shows the overall configuration of the first finger and the rake receiving device, FIG. 3B shows the detailed configuration of the second finger, and FIG. 3C shows the detailed configuration of the third finger.

As shown in the figure, the rake receiving device has a plurality of fingers each corresponding to one path of the multipath of the channel and despreading the signal received on the path. Here, each finger is composed of a time delay, a despreader, a detector, a diffuser, a code generator of a finger, and a subtractor.

First, the overall operation of the rake receiving device will be described.

Hereinafter, the despreaders 307, 311, and 316 are all the same, but are used as "despreader 1" for convenience. The same applies to the detectors 308, 312, 317 and the diffusers 309, 313.

First, the received signal is input to the time delay unit 306 and time delayed by a predetermined time, and the received signal is input to the despreader 1 307 and the despreader 2 308 in parallel by the divider. Here, the divider is represented by a solid line in the drawing, and the same received signal is transmitted to each finger 302 to 304 (specifically, the time delay unit 306 and the despreader 1 307 for the first finger 302). , And despreader 2 (311).

On the other hand, the signal input to the despreader 1 (307) is despread by the code generator 310 of the second finger, the despread signal is demodulated in the spreading code length unit in the detector 1 (308), the demodulation The signal is then spread by the code generator 310 of the second finger in spreader 1 309. Here, the despreader 1 307, the detector 1 308, and the spreader 1 309 all have a function of generating a magnetic interference signal by a signal assigned to the second finger. The interference signal generator may be referred to as an allocated signal, and the generated interference signal is used by the subtractor 315 to remove the interference signal included in the received signal.

On the other hand, the signal input to the despreader 2 (311) is despread by the code generator 314 of the third finger, the despread signal is demodulated in the spreading code length unit in the detector 2 (312), the demodulation The signal is then spread by the code generator 314 of the third finger in spreader 2 (313). Here, the despreader 2 311, the detector 2 312, and the spreader 2 313 perform the function of generating a magnetic interference signal due to the signal assigned to the third finger. The interference signal generator may be referred to as an allocated signal, and the generated interference signal is used by the subtractor 315 to remove the interference signal included in the received signal.

The subtractor 315 is a signal of the spreader 1 (309) (self-interference signal by the signal assigned to the second finger) and the signal of the spreader 2 (313) in the received signal time delayed by the time delay 306 Self-interference signal caused by the signal assigned to the finger) is subtracted to obtain the received signal of the pure first finger 302.

Thereafter, the received signal obtained as described above is despread by the code generator 318 of the first finger in the despreader 3 316 and demodulated in the detector 3 317 to output the signal of the first finger.

In the same manner as above, the signal is also output from the second finger 303 and the third finger 304.

The synthesizer 305 combines the output signals of the first finger 302, the second finger 303, and the third finger 304 to obtain a final output signal.

Hereinafter, each component (eg, searcher, time delay, etc.) of the rake receiving apparatus will be described in detail.

First, the searcher 301 is a part in which a receiving end finds synchronization of a transmission signal for communication with a transmitting end in mobile communication. In particular, in a CDMA system, a receiving end finds a synchronization such as a spreading code (PN code) of a transmitting end and despreads. In this case, a function of finding the starting point of the PN code (spreading code) for each finger is performed.

Specific operations of the searcher are as follows.

The correlation value between the received signal and a predetermined section (e.g., 64 chips, 32 chips, etc.) of the receiver PN code is obtained. At this time, if the correlation value is small, the PN code of the receiver is shifted by one chip to obtain the correlation value again.

As described above, while continuously calculating the correlation value while moving the PN code of the receiver, if the correlation value exceeds the expected reference value, the length of the PN code is changed (expanded) to obtain an accurate correlation value. If the reference value continues to be exceeded, this point becomes the synchronization point of the PN code.

In the process of finding the sync point, the sync point is found by dividing the reference value into several points, all sync points exceeding the reference value are found, and sync points are assigned to the fingers for each correlation value.

Meanwhile, the time delay unit 306 delays the received signal by a predetermined time. The time delay of a digital signal needs to have the same memory as the buffer. In the present invention, the rake receiver operates smoothly with a time delay of about two symbols. Here, one symbol means a length of a PN code corresponding to one bit of an information signal. When one bit of information bits is spread to 64 bits of a PN code, the symbol size is 64 bits.

Meanwhile, the despreaders 307, 311, and 316 spread from the spreader and multiply the received signal received at the receiver by the PN code. If the synchronization point of the code is the same, the output signal of the despreader shows the same signal form as the information signal, but the operation speed is the same as the diffusion speed.

For example, if the information signal is 1Kbps and the PN code is 10Kbps, the PN code length is 10 and the speed of the spread signal is 10Kbps. Since the PN code of the despreader is 10Kbps, the product with the received signal is also 10Kbps.

On the other hand, the detectors 308 and 312 integrate the despread signal by the length of the PN code to find the information signal. In digital signals, 0 and 1 are determined by adding PN code lengths. In the example below, based on 5 (decimal), it is determined as "1" if 5 or more, and "0" if less than 5. If there is an error or noise, it will have a value other than 10 (decimal) or 0, but the detector will remove the less affected noise and interference from other accessors.

       Diffusion Signal 110 100 10 10 00 10 110 101 110 100 10 10 110 100 10 10 00 10 110 101

       PN Code 1101001010 1101001010 1101001010 1101001010 1101001010

       Despread signal 1111111111 0000000000 1111111111 1111111111 0000000000

Integrator 10 0 10 10 0

      Signal after detection 1 0 1 1 0

On the other hand, the spreaders 309 and 313 multiply the information signal by the spreading code (PN code). When the information bits and the spreading code are multiplied, the band occupied by the frequency band is widened by the length of the PN code. The length of the PN code is the number of PN codes multiplied by one bit of the information signal.

For example, as follows, when the information signal is 1 Kbps and the PN code is 10 Kbps, the PN code length is 10 and the speed of the spread signal is 10 Kbps.

       Information signal 1 0 1 1 0

       PN Code 1101001010 1101001010 1101001010 1101001010 1101001010

       Diffusion Signal 110 100 10 10 00 10 110 101 110 100 10 10 110 100 10 10 00 10 110 101

The subtractor 315 subtracts the digital values output from the spreaders 1 309 and 2 spreaders 2 313 from the digital values of the received signal. Therefore, since all signals are synchronized in symbol units, the interference signal is removed through the subtractor.

       Received signal 1110111011

       Diffuser 1 output 0000010001

       Diffuser 2 Output 0010001000

       Subtractor output 1100100010

On the other hand, the operating speed of the code generator 310, 314, 318 of each finger is the same as the speed of the PN code (spreading code), and the starting point of the code is the same as the synchronization point assigned by the searcher (301). Therefore, although the starting point of the code generator of each finger is different, the length and content of the PN code are the same. The code generators 310, 314, and 318 of each finger perform a function of generating a spreading code according to the start point of the spreading code transmitted from the searcher 301.

The combiner 305 synthesizes the signals obtained from the fingers 302 to 304 and restores them to a transmission signal. Since the combiner 305 is a digital signal, the synthesizer 305 may be added in symbol units.

Hereinafter, FIG. 3B and FIG. 3C are demonstrated.

FIG. 3B is a detailed configuration diagram of the second finger 303, similar to the configuration diagram of the first finger 302, but based on a signal assigned to the first finger 302 in a signal assigned to the second finger 303. The code generator 320 of the first finger is used to remove the interference, the code generator 321 of the third finger is used to remove the interference by the signal assigned to the third finger 304, and The difference is that the code generator 322 of the second finger is used to despread the signal from which all interference has been removed (ie, the output of the subtractor).

3C is a detailed configuration diagram of the third finger 304, which is similar to the configuration diagram of the first finger 302, but a signal allocated to the first finger 302 in a signal assigned to the third finger 304. The code generator 330 of the first finger is used to remove the interference caused by the code generator, and the code generator 331 of the second finger is used to remove the interference caused by the signal assigned to the second finger 303. The difference is that the code generator 332 of the third finger is used to despread the signal from which both the point and the interference have been removed (ie, the output of the subtractor).

4 is an explanatory diagram for a magnetic interference cancellation process in a first finger according to the present invention.

Referring to the magnetic interference cancellation process in the first finger of Figure 3a, it is as follows.

The interference cancellation function is performed by the fingers 302 to 304, and the searcher 301 performs a function of notifying the fingers 302 to 304 of the starting point of the PN code of the received signal.

The received signal 404 passing through the time delay 306 is a signal in which interference remains. The received signal becomes an information signal when the received signal passes through the despreader 1 307 and the detector 1 308. Pure information signal. The spreader 1 309 multiplies the PN code again to spread the signal. At this time, since the magnitude of the signal allocated to the second finger is known as a correlation value, when the magnitude of the spread signal is made the size of the signal allocated to the second finger, This becomes the same signal as delayed signal 1 (402).

Subsequently, when the subtractor 315 subtracts the signal of the spreader 1 (that is, the delayed signal 1 in FIG. 4) from the output of the time delayer 306, the delayed signal 1 is removed from the signal 405, that is, the second finger. The interference caused by the assigned signal is eliminated.

On the other hand, in the same manner as described above, the received signal passes through the despreader 2 (311), the detector 2 (312), and the spreader 2 (313), the same signal as the delay signal 2 (403).

When the subtractor 315 subtracts the output signal 403 of the spreader 2 313 from the signal 405 in which only the delay signal 1 has been removed, that is, the signal removed from the interference assigned to the second finger, the delay signal 2 Interference signal is also removed, and the same signal as the transmission signal 401 is generated.

The magnetic interference cancellation method as described above is equally applied to the second finger 303 and the third finger 304.

5A and 5B are explanatory diagrams of the performance of the rake receiver according to the present invention, and graphically show the results of numerical calculation of the degree of performance improvement of the rake receiver corresponding to the present invention in the CDMA system.

FIG. 5A shows a performance improvement (ratio of direct wave to reflected wave: 6 dB) of a DS-CDMA / QPSK system to which a rake receiver according to the present invention is applied in a Rician fading environment, and FIG. 5B shows Rayleigh fading ( Rayleigh Fading) shows the performance improvement of the DS-CDMA / QPSK system to which the rake receiver according to the present invention is applied.

As shown in the figure, the signal-to-noise ratio (Eb / No) is improved in the present invention, i.e., in the case of using the rake receiver using magnetic interference cancellation, than in the case of not using the rake receiver and using the conventional rake receiver.

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 is capable of various substitutions, modifications, and changes without departing from the spirit of the present invention for those skilled in the art to which the present invention pertains, and the above-described embodiments and accompanying It is not limited by the drawings.

As described above, the present invention improves the performance of the demodulated signal of the first finger by removing the interference signal allocated to the second and third fingers from the signal demodulated at the finger, and likewise demodulates the second and third fingers. The performance can be improved by removing the interference signal from the signal, reducing the distortion caused by the interference, and receiving a good quality signal. In other words, the present invention effectively removes the magnetic interference appearing at each tap of the rake receiving device represented by the multipath, so that a high quality signal can be received.

In addition, when the rake receiving apparatus according to the present invention is applied to the receiving system, the next generation mobile communication (IMT) is eliminated without increasing the number of base stations by eliminating multiple access interference and magnetic interference components more effectively than when using a conventional rake receiver. Since the reception performance and the call processing capacity of the system can be effectively improved, many subscribers can be accommodated in the case of voice signals, and high-speed data communication can be enabled in the case of data communication.

In addition, the present invention can reduce the power consumption of the mobile phone due to the low power transmission, there is an effect that can increase the talk time and battery use time of the terminal.

In addition, the present invention can be configured in a flexible configuration of the cell, there is an effect that can reduce the electromagnetic pollution.

Claims (8)

In the rake receiving apparatus using magnetic interference cancellation, Search means for obtaining a starting point of a spreading code for each finger means from the received signal received through the multi-path and transmitting it to the respective finger means; By using the starting point of the spreading code transmitted from the searching means, after removing the magnetic interference by the signal assigned to the finger means other than itself from the received signal, the predetermined signal for demodulating the received signal from which the magnetic interference has been removed A number of said finger means; And Synthesizing means for receiving the self-interference removed demodulated signal from each of the predetermined number of finger means to synthesize the received signals Rake receiving apparatus using a magnetic interference cancellation comprising a. The method of claim 1, Each finger means, Time delay means for delaying the received signal by a predetermined time; Spreading code generating means for generating a spreading code in accordance with a starting point of the spreading code transmitted from said searching means; Despreading the received signal using a spreading code for a finger means other than itself generated by the spreading code generating means, detecting and demodulating the despread signal, and demodulating the demodulated signal. Interfering signal generating means for spreading by using spreading codes for other finger means other than the self, and generating a self-interference signal by a received signal assigned to finger means other than itself; Subtraction means for removing a magnetic interference signal generated by the interference signal generating means from the time delayed received signal transmitted from the time delay means; Despreading means for despreading a received signal from which the self-interference signal has been removed by the subtracting means by using a spreading code for itself generated by the spreading code generating means; And Detection means for detecting and demodulating the despread signal from the despreading means Rake receiving apparatus using a magnetic interference cancellation comprising a. In the rake receiving method applied to the rake receiving apparatus using the magnetic interference cancellation, Receiving a signal transmitted through a multipath, obtaining a starting point of a spreading code for each finger means from the received signal, and then distributing and transmitting the signal to each finger means; A second step of each of the finger means demodulating the received signal from which the magnetic interference has been removed after removing the magnetic interference caused by a signal assigned to other finger means other than itself from the distributed and received signal; And A third step of receiving the demodulated received signal and receiving the demodulated signal from the respective finger means to synthesize and recover the received signals; Rake receiving method using a magnetic interference cancellation comprising a. The method of claim 3, wherein The second step, A fourth step of each of the finger means delaying the distributed and transmitted received signal by a predetermined time; Each of the finger means despreads the distributed signal received by using a spreading code for a finger means other than itself, and then demodulates the despread signal and spreads the demodulated signal. A fifth step of spreading using a code; The sixth step of each of the finger means subtracting the spread signal of the fifth step from the time-delayed received signal of the fourth step to eliminate magnetic interference by the signal assigned to the other finger means; And A seventh step in which each finger means despreads the received signal from which the magnetic interference has been removed using a spreading code for it, and demodulates the despread signal Rake receiving method using a magnetic interference cancellation comprising a. In the finger device using the magnetic interference cancellation, Time delay means for time-delaying a received signal received through the multipath by a predetermined time; Spreading code generating means for generating a spreading code in accordance with a start point of the spreading code obtained from the received signal; Despreading the received signal using a spreading code for a finger device other than itself generated by the spreading code generating means, detecting and demodulating the despreaded signal, and demodulating the demodulated signal. Interfering signal generating means for spreading using a spreading code for a finger device other than the one, and generating a magnetic interference signal by a received signal assigned to a finger device other than itself; Subtraction means for removing a magnetic interference signal generated by the interference signal generating means from the time delayed received signal transmitted from the time delay means; Despreading means for despreading a received signal from which the self-interference signal has been removed by the subtracting means by using a spreading code for itself generated by the spreading code generating means; And Detection means for detecting and demodulating the despread signal from the despreading means Finger apparatus using magnetic interference cancellation comprising a. A finger method applied to a finger device using magnetic interference cancellation, A first step of time-delaying the received signal transmitted through the multipath by a predetermined time; Despreading the received signal using a spreading code for a finger device other than itself according to the starting point of the spreading code obtained from the received signal, demodulating the despreaded signal, and demodulating the demodulated signal. A second step of spreading using the spreading code; A third step of subtracting the spread signal from the time delayed received signal to remove magnetic interference by a signal assigned to the other finger device; And A fourth step of despreading the received signal from which the magnetic interference has been removed using a spreading code for the self signal and demodulating the despread signal Finger method using a magnetic interference cancellation comprising a. In order to eliminate the magnetic interference, in the rake receiving device having a processor, A first function of receiving a signal transmitted through a multipath, obtaining a start point of a spreading code for each finger means from the received signal, and then distributing and transmitting the signal to each finger means; A second function of each of the finger means for demodulating the received signal from which the magnetic interference has been removed after removing the magnetic interference caused by a signal assigned to other finger means other than itself from the distributed and received signal; And A third function of receiving the demodulated received signal and receiving the demodulated signal from the respective finger means to synthesize and recover the received signals; A computer-readable recording medium having recorded thereon a program for realizing this. In order to eliminate magnetic interference, the finger device having a processor, A first function of time delaying the received signal transmitted through the multipath by a predetermined time; Despreading the received signal using a spreading code for a finger device other than itself according to the starting point of the spreading code obtained from the received signal, demodulating the despreaded signal, and demodulating the demodulated signal. A second function of spreading by using the spreading code; A third function of subtracting the spread signal from the time delayed received signal to remove magnetic interference by a signal assigned to the other finger device; And A fourth function of despreading the received signal from which the magnetic interference has been removed using a spreading code for the self signal and demodulating the despread signal A computer-readable recording medium having recorded thereon a program for realizing this.

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