KR100406531B1 - Apparatus and method for modulating data message by employing orthogonal variable spreading factor (ovsf) codes in mobile communication system - Google Patents

Abstract

An object of the present invention is to provide an apparatus and method for modulating a data message which can improve power efficiency of a terminal by reducing peak-to-average power ratio (PAPR) in a mobile communication system. A method for converting source data into a channel modulated signal having a plurality of pairs of in-phase and quadrature data in a terminal using at least one channel of the present invention, the method for generating at least one data portion and a control unit; A first step of coding data, a second step of generating at least one spreading code assigned to the channel, and a third step of spreading the control unit and the data unit to generate the channel modulated signal by using the spreading code Wherein each spreading code is selected based on a data rate of the control portion and the data portion, wherein the spreading codes are located at a point where two consecutive in-phase and quadrature data pairs are located in the phase domain; or It is chosen to correspond to two points that are zero symmetric.

Description

Apparatus and method for modulating data message using variable factor orthogonal spreading code in mobile communication system

The present invention relates to an apparatus and method for modulating a data message in a mobile communication system, and more particularly, to an apparatus and method for modulating a data message using an orthogonal variable spreading factor (OVSF) code in a mobile communication system. It is about.

In general, a mobile communication system such as an international mobile telecommunication-2000 (IMT-200) system can provide various services of high quality and large capacity and roaming between countries. The mobile communication system can be applied to high speed data and multimedia services such as Internet service and electronic commerce service. The mobile communication system performs orthogonal spreading for a plurality of channels. The mobile communication system assigns quadrature spreading channels to in-phase and quadrature branches. The peak-to-average power ratio (PAPR) required to transmit data in in-phase and quadrature branches simultaneously affects the power efficiency and battery life of the terminal.

The power efficiency and the usage time of the terminal are closely related to the modulation scheme of the terminal. As modulation standards for IS-2000 and asynchronous wideband CDMA, orthogonal complex quadrature phase shift keying (OCQPSK) modulation scheme has been adopted. The modulation scheme of OCQPSK is described in 'Spectrally Efficient Modulation and Spreading Scheme for CDMA Systems' in electronics letters, 12th November 1998, vol. 34, No. 23, pp. 2210-2211.

As disclosed in the paper, the terminal performs orthogonal spreading by using a Hadamard sequence as a Walsh code in the modulation scheme of OCQPSK. The I and Q channels are then spread by spreading codes such as pseudo noise (PN) code, Kasami code, Gold code, and Walsh rotors.

In the case of multiple channels, the terminal performs orthogonal spreading by using different sequences. The quadrature diffusion channels are then coupled to in-phase and quadrature branches. Thereafter, orthogonal diffusion channels coupled to the in-phase branch and orthogonal diffusion channels coupled to the quadrature branch are separately summed. The in-phase and quadrature branches are then scrambled by the Walsh rotor and the scrambling code. However, the above-described modulation scheme has a problem in that PAPR cannot be effectively reduced in a mobile communication system.

An object of the present invention is to provide an apparatus and method for modulating a data message that can improve power efficiency of a terminal by reducing PAPR in a mobile communication system.

1 is a block diagram of a terminal to which the present invention is applied.

2 is a diagram showing a tree structure of a spreading code applied to the present invention.

3 is a block diagram of the modulator shown in FIG. 1 in accordance with the present invention;

4 is a block diagram of the spreading code generator shown in FIG.

5 is an explanatory diagram illustrating a case where a terminal uses two channels.

6 is an explanatory diagram illustrating a case where a plurality of terminals use a common complex scrambling code;

7 is an explanatory diagram illustrating a case where a terminal uses a plurality of channels.

FIG. 8 is a first example illustrating a preferred phase difference between rotated points when the Walsh rotor rotates the points of the continuous chip on the phase domain.

Fig. 9 is a second example for explaining the preferred phase difference between the rotated points when the Walsh rotor rotates the points of the continuous chip on the phase domain.

Fig. 10 is a first exemplary diagram illustrating an undesirable phase difference between rotated points when the Walsh rotor rotates the points of the continuous chip on the phase domain.

11 and 12 illustrate a third example illustrating a preferable phase difference between rotated points when the Walsh rotor rotates the points of the continuous chip on the phase domain.

13 and 14 illustrate a second example illustrating an undesirable phase difference between the rotated points when the Walsh rotor rotates the points of the continuous chip on the phase domain.

15 is a graph showing the probability of peak power with respect to average power.

16-22 are flowcharts of a method for modulating a data message in a terminal according to the present invention.

* Explanation of symbols for main parts of the drawings

100 modulator 110 encoder

120 Code Generator 130 Diffuser

140 Scrambler 150 Filter

160 gain controller 170 adder

180 CPU

In order to achieve the above object, the present invention provides a device for converting source data into a channel modulated signal having a plurality of in-phase and quadrature data pairs in a terminal using N (where N is an integer of 2 or more). Channel coding means for coding the source data to generate (N-1) data units and control units; Code generation means for generating at least one spreading code assigned to the channel; And spreading means for spreading the control portion and the data portion by using the spreading code to generate the channel modulated signal, wherein each spreading code is selected based on a data rate of the control portion and the data portion, Spreading codes are chosen such that two consecutive in-phase and quadrature pairs of data on the phase domain correspond to two points that are located at the same point or are zero symmetric.

In addition, the present invention provides a terminal for using N channels when N is a positive integer, and converting the source data into a channel modulated signal having a plurality of pairs of in-phase and quadrature data, (N-1) Channel coding means for coding the source data to generate two data units and a control unit; Code generation means for generating N spreading codes assigned to the channel; And spreading means for spreading the control portion and the data portion by using the spreading code to generate the channel modulated signal, wherein each spreading code is selected based on a data rate of the control portion and the data portion, The spreading codes are chosen such that two consecutive in-phase and quadrature pairs of data on the phase domain correspond to two points that are located at the same point or are zero symmetric.

In addition, the present invention provides a method for converting source data into a channel modulated signal having a plurality of pairs of in-phase and quadrature data in a terminal using N channels, where N is an integer of 2 or more. Coding the source data to generate a data portion and a control unit of the first; Generating at least one spreading code assigned to the channel; And a third step of spreading the control unit and the data unit to generate the channel modulated signal by using the spreading code, wherein each spreading code is selected based on a data rate of the control unit and the data unit. Spreading codes are chosen such that two consecutive in-phase and quadrature pairs of data on the phase domain correspond to two points that are located at the same point or are zero symmetric.

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

1, a block diagram of a terminal to which the present invention is applied is shown. As shown, the terminal includes a user interface 20, a central processing unit (CPU) 180, a modem 12, a source codec 30, a frequency converter 80, and a user identification module 50. And an antenna 70. The modem 12 includes a channel codec 13, a modulator 100 and a demodulator 120. Channel codec 13 includes an encoder 110 and a decoder 127.

The user interface 20 includes a display, a keypad, and the like. The user interface 20 is coupled to the CPU 180 and transmits a data message to the CPU 180 in response to user input from the user.

The user identification module 50 is coupled to the CPU 180 and transmits the user identification information to the CPU 180 as a data message. The source codec 30 is coupled to the CPU 180 and the modem 12, and encodes source data such as video and voice to generate encoded source data as a data message. Thereafter, the source codec 30 transmits the source data encoded as the data message to the CPU 180 or the modem 12. In addition, the source codec 30 decodes the data message from the CPU 180 or the modem 12 to generate source data such as video and voice. Thereafter, the source codec 30 transmits the source data to the CPU 180.

The encoder 110 included in the channel codec 13 encodes a data message from the CPU 180 or the source codec 30. The encoder 110 then generates one or more data portions. Thereafter, the encoder 110 generates a control unit. The encoder 110 transmits one or more data units to the modulator 100. The modulator 100 modulates one or more data units and a controller to generate in-phase signals and quadrature signals as baseband signals. The frequency converter 80 converts the baseband signal into an intermediate frequency (IF) signal in response to a conversion control signal from the CPU 180. After converting the baseband signal into an intermediate frequency signal, the frequency converter 80 converts the baseband signal into a radio frequency (RF) signal. The frequency converter 80 also controls the gain of the radio frequency signal. The antenna 70 transmits a radio frequency signal to a base station (not shown).

The antenna 70 transmits a radio frequency signal from the base station to the frequency converter 80. The frequency converter 80 converts the radio frequency signal into an intermediate frequency signal. After converting the radio frequency signal into an intermediate frequency signal, the frequency converter 80 converts the intermediate frequency signal into a baseband signal as an in-phase signal and a quadrature signal. The demodulator 90 demodulates the in-phase signal and the quadrature signal to generate one or more data units and a controller. The decoder 127 included in the channel codec 13 decodes one or more data units and a controller to generate a data message. The decoder 127 transmits the data message to the CPU 180 or the source codec 30.

Referring to Fig. 2, there is shown a diagram showing a tree structure of a spreading code as an orthogonal variable spreading code (OVSF) code applied to the present invention. As shown, the spreading code is determined by a spreading factor (SF) and a code number in the code tree, where the spreading code is C _{SF, code number} . C _{SF, code number} consists of a real value sequence. The spreading code is 2 ^N when N is 2 to 8, and the code number is 0 to 2 ^N -1.

For example, a spreading code having a SF of 1 and a code number of 1 has a C _{8, 1} = (1, 1, 1, 1, -1, -1, according to Equation 1 and Equation 2). -1, -1}. If the spreading code is 2 or more, the spreading codes are grouped into two groups including the first group and the second group according to the code number sequence. The first group includes a spreading code having a code number of 0 to SF / 2-1 and a spreading factor, and the second group includes a spreading code having a code number and spreading factor of SF / 2 to SF-1. Therefore, the number of spreading codes included in the first group is equal to the number of spreading codes included in the second group.

Each spreading code included in the first group or the second group has a real value. Each spreading code included in the first group or the second group may be used for the OCQPSK modulation scheme. The spreading code included in the first group is preferably selected from the OCQPSK modulation scheme. However, when the spreading code included in the second group is multiplied by another spreading code having the minimum code number included in the second group, for example, SF / 2, the product of the spreading codes included in the second group is the first. It is the same as the spreading code included in the group. Therefore, the product of the spreading codes included in the second group is represented by the spreading code of the first group. In conclusion, all spreading codes of the first and second groups, that is, the OVSF codes, are useful for reducing the PAPR of the terminal.

3, there is shown a block diagram of the modulator shown in FIG. 1 in accordance with the present invention. The mobile communication system includes a base station and a terminal using a plurality of channels, where the terminal includes a modulator. The plurality of channels includes a control channel and one or more data channels.

One or more data channels include a physical random access channel (PRACH), a physical common packet channel (PCPCH), and a dedicated physical channel (DPCH). In a PRACH or PCPCH application, the control channel and data channel, ie PRACH or PCPCH, are coupled between the encoder 110 and the spreader 130. The DPCH includes a plurality of dedicated physical data channels (DPDCHs). In a DPCH application, a dedicated physical control channel (DPCCH) and six data channels, namely DPDCH1 to DPDCH5, as a control channel are coupled between the encoder 110 and the spreader 130. As shown, the modulator 100 includes an encoder 110, a code generator 120, a spreader 130, a scrambler 140, a filter 150, a gain adjuster 160, and an adder 170.

The encoder 110 encodes a data message to be transmitted to the base station to generate one or more data units. The encoder 110 generates a control unit having control information. The encoder 110 evaluates a spreading factor based on the data rates of one or more data units.

The CPU 180 is coupled to the encoder 110 and receives a spreading factor related to one or more data units from the encoder 110. The CPU 180 calculates one or more code numbers related to one or more data units, and calculates a spreading factor and code numbers related to the control unit.

The code generator 120 includes a spreading code generator 121, a signature generator 122, and a scrambling code generator 123. The code generator 120 is coupled to the CPU 180 and generates spreading codes, ie C _d1 to C _dn and C, signature S and complex scrambling code. The spreading code generator 121 is coupled to the CPU 180 and the spreader 130, and spreads the spreading code in response to a spreading factor and one or more code numbers associated with one or more data units from the CPU 180. And generates a spreading code in response to a spreading factor and a code number related to the control unit from the CPU 180. The spreading code generator 121 transmits the spreading code to the spreader 130.

The signature generator 122 is coupled to the CPU 180 and the spreading code generator 121, generates a signature S, and transmits the signature S to the spreading code generator 121. The scrambling code generator 123 generates a complex scrambling code and transmits it to the scrambler 140.

The spreader 130 spreads the control unit from the encoder 110 and one or more data units using a spreading code from the code generator 120.

The scrambler 140 generates a scrambled signal by scrambling one or more data units, a controller, and a scrambling code spread by the spreader 130. The scrambler 140 includes a Walsh rotor, wherein the Walsh rotor Is typically used in the OCQPSK modulation scheme. The Walsh rotator rotates one or more data portions and the controller spread by the diffuser 130.

The filter 150, or root raised cosine (RRC) filter, pulse-shapes the scrambled signal to generate pulse-shaped signals. The gain regulator 160 generates gain-adjusted signals by multiplying each pulse shaping signal by the gain of each channel. The adder 170 generates a channel modulated signal having a plurality of pairs of in-phase and quadrature data by summing gain control signals related to the in-phase branch or gain control signals related to the quadrature branch.

4, there is shown a block diagram of the spreading code generator shown in FIG. As shown, the spreading code generator includes a memory 210, an 8-bit counter 220, a number of logic operators 231 and 233, and a number of multiplexers 232 and 234.

The memory device 210 includes one or more registers 211 associated with one or more data units and a register 212 associated with a control unit. One or more registers 211 store spreading factors and code numbers related to the control unit transmitted from the CPU 180 shown in FIG.

The 8-bit counter 220 is an 8-bit count signal synchronized with the clock signal CHIP_CLK issued from an external circuit and calculates a count value of B ₇ B ₆ B ₅ B ₄ B ₃ B ₂ B ₁ B ₀ , where B ₀ to B ₇ consists of a binary number of 0 or 1, respectively.

One or more logic operators 231 spread the information associated with one or more data parts by performing a logical operation using a spreading factor and a code number associated with one or more data parts stored in one or more registers 211. Generate the code. The code number is I ₇ I ₆ I ₅ I ₄ I ₃ I ₂ I ₁ I ₀ , where I ₀ to I ₇ are binary numbers of 0 or 1, respectively.

The logical operator 233 performs a logical operation using a spreading factor related to the control unit stored in the register 212 and a code number of I ₇ I ₆ I ₅ I ₄ I ₃ I ₂ I ₁ I ₀ to spread the code related to the control unit. Create

Here, "·" represents the product in modulo 2, Denotes an exclusive OR operation. Each logical operator 231 or 233 performs a logical operation according to Equation 3 when the spreading factor is ^2N .

If the spreading factor is 256, each logical operator (231 or 233) is B ₇ I _10. B ₆ · I ₁ B ₅ · I ₂ B ₄ · I ₃ B ₃ · I ₄ B ₂ · I ₅ B ₁ · I ₆ Perform a logical operation of B ₀ · I ₇ .

If the spreading factor is 128, each logical operator 231 or 233 is assigned to B ₆ I _10. B ₅ · I ₁ B ₄ · I ₂ B ₃ · I ₃ B ₂ · I ₄ B ₁ · I _{5 0} · B performs a logic operation of I _6.

If the spreading factor is 64, then each logical operator 231 or 233 is B ₅ I _10. B ₄ · I ₁ B ₃ · I ₂ B ₂ · I ₃ B ₁ · I ₄ Perform a logical operation of B ₀ · I ₅ .

If the spreading factor is 32, then each logical operator 231 or 233 is B ₄ I _10. B ₃ · I ₁ B ₂ · I ₂ B ₃ · I ₃ Perform a logical operation of B ₀ · I ₄ .

If the spreading factor is 16, each logical operator 231 or 233 is B ₃ I _10. B ₂ · I ₁ B _{1 2} · I Perform a logical operation of B ₀ · I ₃ .

If the spreading factor is 8, each logical operator (231 or 233) is B ₂ · I _0. B ₁ · I ₁ Perform a logical operation of B ₀ · I ₂ .

If the spreading factor is 4, then each logical operator 231 or 233 is B ₁ · I _0. Perform a logical operation of B ₀ · I ₁ .

One or more multiplexers 232 selectively spread one or more spreading codes from one or more logic operators 231 in response to one or more selection signals as spreading factors associated with one or more data portions. Output

The multiplexer 234 outputs a spreading code from the logic operator 233 in response to the selection signal as a spreading factor related to the controller.

Referring to FIG. 5, an explanatory diagram illustrating a case where a terminal uses two channels is shown.

As shown, if the terminal is a 2 ^N spreading factor when using the two-channel and N is 2 to 8, a spreading code generator 121 is C _{SF, SF / 4} is allocated to the DPDCH or the PCPCH as a data channel Generate a spreading code of. In addition, the spreading code generator 121 generates a spreading code of C _{256 and 0} assigned to the DPCCH or the control channel. The spreader 130 spreads DPDCH or PCPCH using spread codes of C _{SF and SF / 4} . In addition, the spreader 130 spreads the control channel using a spreading code of C _{256, 0} . At this time, the scrambling code generator 123 generates a complex scrambling code assigned to the terminal. In addition, the complex scrambling code may be temporarily stored in the terminal.

Referring to FIG. 6, an exemplary diagram illustrating a case where a plurality of terminals share a common complex scrambling code in a PRACH application is shown.

As shown, if a plurality of terminals use a common complex scrambling code, and if the spreading code is 2 ^N when N is 5 to 8, the spreading code generator 121 is assigned to the _SF C _{SF and SF (S-1). ) /} generates a spreading code of _16. In addition, the spreading code generator 121 generates a spreading code of C _{SF and SF (S-1) + 15} assigned to the control channel.

Thereafter, the spreader 130 spreads the PRACH using spreading codes of C _{SF and SF (S-1) / 16} . In addition, the spreader 130 spreads the control channel using a spreading code of C _{SF and SF (S-1) + 15} . At this time, the scrambling code generator 123 generates a common complex scrambling code.

Referring to FIG. 7, an exemplary diagram illustrating a case in which a terminal uses a plurality of channels is shown. As shown, when the terminal uses a control channel and two data channels, and the spreading factor associated with the two data channels is 4, the spreading code generator 121 spreads the C _{256 and 0} spreading codes assigned to the DPCCH. Create Further, the spreading code generator 121 generates spreading codes of C _{4 and 1} allocated to DPDCH1. In addition, the spreading code generator 121 generates spreading codes of C _{4 and 1} allocated to DPDCH2.

Thereafter, the spreader 130 spreads the DPDCH1 using the spreading codes of C _{4 and 1} . In addition, the diffuser 130 diffuses the DPDCH2 by using C4 _{, 1} spreading codes. In addition, the spreader 130 spreads the DPCCH using spread codes of C _{256 and 0} . At this time, the scrambling code generator 123 generates a complex scrambling code assigned to the terminal.

As shown, when the terminal uses a control channel and three data channels and the spreading factor associated with the three data channels is 4, the spreading code generator 121 receives the spreading codes of C _{4 and 3} allocated to DPDCH3. Generate more. In addition, the diffuser 130 diffuses the DPDCH3 by using C4 _{, 3} spreading codes.

As shown, when the terminal uses a control channel and four data channels and the spreading factor related to the data channels is 4, the spreading code generator 121 receives the spreading codes of C _{4 and 3} allocated to DPDCH4. Generate more. In addition, the diffuser 130 diffuses the DPDCH4 by using C4 _{, 3} spreading codes.

As shown, when the terminal uses a control channel and five data channels and the spreading factor associated with the three data channels is 4, the spreading code generator 121 receives the spreading codes of C _{4 and 2} allocated to DPDCH5. Generate more. In addition, the diffuser 130 diffuses DPDCH5 by using C4 _{and 2} spreading codes.

As shown, when the terminal uses a control channel and five data channels and the spreading factor associated with the three data channels is 4, the spreading code generator 121 receives the spreading codes of C _{4 and 2} allocated to DPDCH6. Generate more. In addition, the diffuser 130 diffuses DPDCH6 by using C4 _{, 2} spreading codes.

Referring to Fig. 8, there is shown a first exemplary diagram illustrating a preferred phase difference between rotated points when the Walsh rotor rotates the points of the continuous chip on the phase domain.

As shown, when the spreading factor is 4 and the code number is 0, the spreading codes of C _{4 and 0} are {1, 1, 1, 1}. Further, when the spreading factor is 4 and the code number is 1, the spreading codes of C _{4 and 1} are {1, 1, -1, -1}.

It is assumed that two channels are spread by C _{4, 0} = {1, 1, 1, 1} and C _{4, 1} = {1, 1, -1, -1}, respectively. At this time, the real value included in the spreading code of C _{4, 0} = {1, 1, 1, 1} is represented as a point in the real axis on the phase domain. In addition, the real value included in the spreading code of C _{4, 1} = {1, 1, -1, -1} is represented as a point in the imaginary axis on the phase domain.

In the first or second chip, points {1, 1}, i.e. points ① or ②, are specified on the phase domain by the first or second real values contained in the spread codes of C _{4, 0} and C _{4, 1} do. In the third or fourth chip, point {1, -1}, i.e., point ③ or ④ on the phase domain by the third or fourth real values included in the spreading codes of C _{4, 0} and C _{4, 1} Is specified. Points ① and ② are located at the same point. Points ③ and ④ are located at the same point. When the Walsh rotor rotates the points in the chips, the points are each rotated by a predetermined phase.

For example, when the Walsh rotor rotates points ① or ③ on the odd chip, the points ① or ③ are rotated clockwise by a phase of 45 °. Further, when the Walsh rotor rotates the point ② or ④ on the even-numbered chip, the point ② or ④ is rotated counterclockwise by a phase of 45 °. If after rotating the points ① and ②, or points ③ and ④ in the odd and even chips, the phase difference between the rotated points ① 'and ②' or points ③ 'and ④' becomes 90 °, PAPR of the terminal can be reduced.

In another example, when the Walsh rotor rotates points ① or ③ on the odd chip, points ① or ③ are rotated counterclockwise by a phase of 45 °. Further, when the Walsh rotor rotates the point ② or ④ on the even-numbered chip, the point ② or ④ is rotated clockwise by a phase of 45 °. If after rotating the points ① and ②, or points ③ and ④ in the odd and even chips, the phase difference between the rotated points ① "and ②" or points ③ "and ④" becomes 90 °, PAPR of the terminal can be reduced.

Fig. 9 shows a second embodiment showing a preferred phase difference between rotated points on the phase domain when the Walsh rotor rotates a point in the continuous chip.

First, it is assumed that two channels are spread by C _{4, 2} = {1, -1, 1, -1} and C _{4, 3} = {1, -1, -1, 1}, respectively.

In the first chip, the points {1, 1}, i.e. point ① _, are designated on the phase domain by the first real value contained in the spread codes of C4 _{, 2} and C4 _{, 3} . In the second chip, the points {-1, -1}, i.e. point ② _, are designated on the phase domain by the second real value contained in the spreading codes of C4 _{, 2} and C4 _{, 3} . Points ① and ② are zero symmetric in the phase domain.

In the third chip, the points {1, -1}, i.e., point ③ _, are designated on the phase domain by the third real number included in the spreading codes of C4 _{, 2} and C4 _{, 3} . In the fourth chip, the points {-1, 1}, ie, point ④, are designated in the phase domain by the fourth real number contained in the spreading codes of C _{4, 2} and C _{4, 3} . Points ③ and ④ are zero symmetric in the phase domain. When the Walsh rotor rotates a point on the chip, the pointers are each rotated by a predetermined phase.

For example, if the Walsh rotor rotates points ① or ③ on the odd chip, points ① or ③ are rotated clockwise by 45 °. Also, if the Walsh rotor rotates point ② or ④ on the even-numbered chip, point ② or ④ is rotated counterclockwise by 45 °. After rotating the points ① and ② or points ③ and ④ at the odd and even numbers with two consecutive chips, the rotated points ① 'and ②' or the rotated points ③ 'and ④' are 90 °. When the phase difference between the rotated points ① 'and ②' or the rotated points ③ 'and ④' is 90 °, the PAPR of the terminal is reduced.

For another example, if the Walsh rotor rotates points ① or ③ on the odd chip, the points ① or ③ are rotated counterclockwise by 45 °. Also, if the Walsh rotor rotates point ② or ④ on the even-numbered chip, point ② or ④ is rotated clockwise by 45 °. After rotating the points ① and ② or points ③ and ④ at the odd and even numbers with two consecutive chips, the rotated points ① " and ② " or the rotated points ③ " and ④ " When the phase difference between the rotated points ① "and ②" or the rotated points ③ "and ④" is 90 °, the PAPR of the terminal is reduced.

Fig. 10 is a diagram showing the first embodiment showing an undesirable phase difference between rotated points on the phase domain when the Walsh rotor rotates a point in the continuous chip.

First, it is assumed that two channels are spread by C _{4, 0} = {1, 1, 1, 1} and C _{4, 2} = {1, -1, 1, -1}.

In the first chip, the points {1, 1}, i.e. point ① _, are designated on the phase domain by the first real value contained in the spreading codes of C _{4, 0} and C _{4, 2} . In the second chip, the points {1, -1}, i.e. point ② _, are designated on the phase domain by the second real number contained in the spread codes of C4 _{, 0} and C4 _{, 2} . Points ① and ② are symmetric about the real axis in the phase domain.

In the third chip, the points {1, 1}, i.e. point ③ _, are designated on the phase domain by the third real value included in the spread codes of C4 _{, 0} and C4 _{, 2} . In the fourth chip, the points {1, -1}, i.e. point ④ _, are designated on the phase domain by the fourth real number included in the spreading codes of C _{4, 0} and C _{4, 2} . Points ③ and ④ are symmetric about the real axis in the phase domain. When the Walsh rotor rotates a point on the chip, the pointers are each rotated by a predetermined phase.

For example, if the Walsh rotor rotates points ① or ③ on the odd chip, the points ① or ③ are rotated counterclockwise by 45 °. Also, if the Walsh rotor rotates point ② or ④ on the even-numbered chip, point ② or ④ is rotated clockwise by 45 °. After rotating the points ① and ② or points ③ and ④ at odd and even numbers with two consecutive chips, the phase difference between rotated points ① 'and ②' or rotated points ③ 'and ④' is zero. Becomes If the phase difference between the rotated points ① 'and ②' or the rotated points ③ 'and ④' does not become 90 °, the PAPR of the terminal is not reduced.

11 and 12 show a third embodiment showing a preferable phase difference between rotated points on the phase domain when the Walsh rotor rotates a point on the continuous chip.

1 data allocated to the first channel is spread by a spreading code of C _{4, 1} = {1, 1, -1, -1}, and data of -1 allocated to the second channel is C _{4, 1} = Spread by a spreading code of {1, 1, -1, -1}, and data of 1 allocated to the third channel is spread by spreading code of C _{4, 0} = {1, 1, 1, 1} Assume

For the first channel, the spreader 130 shown in FIG. 3 multiplies the data of 1 by the spreading code of C _{4, 1} = {1, 1, -1, -1}, and thus {1, 1, -1, -1. } Generates the code. In addition, for the second channel, the spreader 130 multiplies the data of -1 by a spreading code of C _{4, 1} = {1, 1, -1, -1} _, thereby providing {-1, -1, 1, 1}. Generate the code. In addition, for the third channel, the spreader 130 multiplies the data of 1 by the spreading code of C _{4, 0} = {1, 1, 1, 1} to generate a code of {1, 1, 1, 1}.

When the diffuser 130 includes the adder 131 shown in FIG. 12, the adder 131 adds the codes of {-1, -1, 1, 1} and the codes of {1, 1, 1, 1} to {0, 0 , Code 2, 2}.

chip First chip 2nd chip 3rd chip 4th chip First channel One One -One -One 2nd channel -One -One One One 3rd channel One One One One 2nd channel + 3rd channel 0 0 2 2

Table 1 shows each spreading code allocated to three channels according to the chip and the sum of the two channels. In the first or second chip, points {1, 0}, i.e., points ① or ②, are included in the code of {1, 1, -1, -1} and the code of {0, 0, 2, 2). It is specified in the phase domain by one or second real values. In the third or fourth chip, the points {-1, 2}, that is, the points ③ or ④ are included in the code of {1, 1, -1, -1} and the code of {0, 0, 2, 2) Specified in the phase domain by third or fourth real values. Points ① and ② are located at the same point. Also, points ③ and ④ are located at the same point. When the Walsh rotor rotates a point on the chip, the points are each rotated by a predetermined phase.

For example, when the Walsh rotor rotates points ① or ③ on the odd chip, the points ① or ③ are rotated clockwise by a phase of 45 °. Also, when the Walsh rotor rotates point ② or ④ on the even-numbered chip, point ② or ④ is rotated counterclockwise by a phase of 45 °. After rotating the points ① and ② or points ③ and ④ in the odd and even chips, the phase difference between the rotated points ① 'and ②' or points ③ 'and ④' becomes 90 °. When the phase difference between the rotated points ① 'and ②' or the rotated points ③ 'and ④' is 90 °, the PAPR of the terminal is reduced.

13 and 14 show a second embodiment showing an undesired phase difference between the points rotated in the phase domain when the Walsh rotor rotates the points in the continuous chip.

First, data of 1 allocated to the first channel is spread by a spreading code of C _{4, 1} = {1, 1, -1, -1}, and data of -1 allocated to the second channel is C _{4, 2} = {1, -1, 1, -1} is spread by a spreading code, and 1 data allocated to the third channel is spread by C _{4, 0} = {1, 1, 1, 1}. Suppose it spreads.

For the first channel, the spreader 130 shown in FIG. 3 multiplies the data of 1 by the spreading code of C _{4, 1} = {1, 1, -1, -1}, {1, 1, -1, -1} Generate the code for. In addition, for the second channel, the spreader 130 multiplies the data of -1 by the spreading code of C _{4, 2} = {1, -1, 1, -1}, so that {-1, 1, -1, 1} Generate the code. In addition, for the third channel, the spreader 130 multiplies the data of 1 by the spreading code of C _{4, 0} = {1, 1, 1, 1} to generate a code of {1, 1, 1, 1}. .

When the diffuser 130 includes the adder 133 shown in Fig. 14, the adder 133 adds the codes of {-1, 1, -1, 1} and the codes of {1, 1, 1, 1} to {0, 2 , 0, 2}

chip First chip 2nd chip 3rd chip 4th chip First channel One One -One -One 2nd channel -One One -One One 3rd channel One One One One 2nd channel + 3rd channel 0 2 0 2

Table 2 shows the spreading codes assigned to the three channels according to the chip and the sum of the two channels. In the first chip, the points {1, 0}, i.e., the point ①, correspond to the first real values contained in the code of {1, 1, -1, -1} and the code of {0, 2, 0, 2). In the phase domain. In the second chip, the point {1, 2}, i.e., point ②, corresponds to the second real values contained in the code of {1, 1, -1, -1} and the code of {0, 2, 0, 2). In the phase domain. In the third chip, the points {-1, 0}, ie, point ③, are the third real values contained in the code of {1, 1, -1, -1} and the code of {0, 2, 0, 2). Is specified in the phase domain by. In the fourth chip, the points {-1, 2}, ie, point ④, are the fourth real values contained in the code of {1, 1, -1, -1} and the code of {0, 2, 0, 2). Is specified in the phase domain by.

Points ① and ② or points ③ and ④ are located at different points. When the Walsh rotor rotates a point on the chip, the points are each rotated by a predetermined phase.

For example, when the Walsh rotor rotates points ① or ③ on the odd chip, the points ① or ③ are rotated clockwise by a phase of 45 °. Also, when the Walsh rotor rotates point ② or ④ on the even-numbered chip, point ② or ④ is rotated counterclockwise by a phase of 45 °. After rotating the points ③ and ④ in the odd and even numbers, the phase difference between the rotated points ③ 'and ④' does not become 90 °. If the phase difference between the rotated points ③ 'and ④' does not become 90 °, the PAPR of the terminal is increased.

Also, after rotating the points ① and ② in the odd and even chips, if the phase difference between the rotated points ① 'and ②' does not become 90 °, the PAPR of the terminal is increased.

15 is a graph showing the probability of PAPR.

Curve G1 shows a case where the terminal uses spreading codes of C _{4, 0} = {1, 1, 1, 1} and C _{4, 1} = {1, 1, -1, -1} assigned to two channels. It is a curve to represent. At this time, the probability that the peak power exceeds the average power by 2.5 dB is about 1%.

Further, curve G2 uses a spreading code of C _{4, 0} = {1, 1, 1, 1} and C _{4, 2} = {1, -1, 1, -1} assigned to the two channels by the terminal. A curve representing the case. At this time, the probability that the peak power exceeds the average power by 2.5 dB is about 7%.

16 is a flowchart illustrating a method of modulating a data message in a terminal according to the present invention.

Referring to Figure 16, in step S1302, the encoder receives a data message to be transmitted to the base station.

In step S1304, the encoder encodes a data message having one or more data units and generates a control unit.

In step S1306, the encoder evaluates SF related to one or more data units and transmits SF from the incubator to the CPU.

In step S1308, the CPU calculates information necessary to generate a spreading code to be assigned to the channel.

In step S1310, the code generator generates a spreading code.

In steps S1312 and S1314, the spreader performs spreading, and the scrambler scrambles the spread control unit, the data portion, and the complex scrambling code.

17 through 19 are flowcharts illustrating a procedure of calculating information necessary for generating a spreading code to be allocated to a channel.

Referring to Fig. 17, in step S1402, the CPU receives an SF related to one or more data units from the encoder.

In step S1404, the CPU determines the type of event.

In step S1408, when the terminal is an event using two channels, the CPU calculates 256 SF and 0 code numbers related to the control unit.

In step S1410, when the SF is ^2N and N is 2 to 8, the CPU calculates a code number of SF / 4 associated with one data unit.

In step S1412, the CPU transmits the code number and SF associated with the data portion and the control portion to the code generator.

In step S1414, when a plurality of terminals are events sharing a common complex scrambling code, the CPU calculates a signature S.

In step S1416, when S is 1 to 16, the CPU calculates 256 SFs and 16 (S-1) + 15 code numbers related to the control unit.

In step S1418, the CPU calculates the code number of SF (S-1) / 16 related to one data unit, when SF is ^2N , N is 2 to 8 and S is 1 to 16.

In step S1420, the CPU transmits the code number and SF associated with the data portion and the control unit to the code generator.

In step S1424, when the terminal is an event using a plurality of channels, the CPU calculates a code number of 0 and an SF of 256 associated with the control unit assigned to the control channel.

In step S1502, the CPU determines the number of data channels.

In step S1504, if the number of data channels is two, the CPU calculates a code number of 1 and SF of 4 associated with the first data portion allocated to the first data channel coupled to the in-phase branch.

In step S1506, the CPU calculates a code number of 1 and SF of 4 associated with the second data portion allocated to the second data channel.

In step S1508, if the number of data channels is three, the CPU calculates a code number of 1 and SF of 4 associated with the first data portion allocated to the first data channel.

In step S1510, the CPU calculates a code number of 1 and SF of 4 associated with the second data portion allocated to the second data channel.

In step S1512, the CPU calculates a code number of 3 and SF of 4 associated with the third data portion allocated to the third data channel.

In step S1514, if the number of data channels is four, the CPU calculates a code number of 1 and SF of 4 associated with the first data portion allocated to the first data channel.

In step S1516, the CPU calculates a code number of 1 and SF of 4 associated with the second data portion allocated to the second data channel.

In step S1518, the CPU calculates a code number of 3 and SF of 4 associated with the third data portion allocated to the third data channel.

In step S1520, the CPU calculates a code number of 3 and an SF of 4 related to the fourth data portion allocated to the fourth data channel.

In step S1522, if the number of data channels is five, the CPU calculates a code number of 1 and SF of 4 associated with the first data portion allocated to the first data channel.

In step S1524, the CPU calculates a code number of 1 and SF of 4 associated with the second data portion allocated to the second data channel.

In step S1526, the CPU calculates a code number of 3 and SF of 4 associated with the third data portion allocated to the third data channel.

In step S1528, the CPU calculates a code number of 3 and SF of 4 associated with the fourth data portion assigned to the fourth data channel.

In step S1530, the CPU calculates a code number of 2 and SF of 4 associated with the fifth data portion allocated to the fifth data channel.

In step S1532, if the number of data channels is six, the CPU calculates a code number of 1 and SF of 4 associated with the first data portion allocated to the first data channel.

In step S1534, the CPU calculates a code number of 1 and SF of 4 associated with the second data portion allocated to the second data channel.

In step S1536, the CPU calculates a code number of 3 and an SF of 4 related to the third data portion allocated to the third data channel.

In step S1538, the CPU calculates a code number of 3 and SF of 4 associated with the fourth data portion assigned to the fourth data channel.

In step S1540, the CPU calculates a code number of 2 and SF of 4 associated with the fifth data portion allocated to the fifth data channel.

In step S1542, the CPU calculates a code number of 2 and SF of 4 associated with the sixth data portion assigned to the sixth data channel.

In step S1521, the CPU transmits the code number and SF associated with the data portion and the control portion to the code generator.

20 is a flowchart illustrating a procedure of generating a spreading code.

Referring to Fig. 20, in step S1702, the register receives a code number and SF from the CPU.

In step S1704, the register stores the code number and SF.

In step S1706, the logical operator performs a logical operation in response to the 8-bit count value to generate a spreading code.

In step S1708, the multiplexer selects a spreading code in response to SF as the selection signal.

21 and 22 are flowcharts illustrating a procedure of generating a spreading code by performing a logical operation in response to an 8-bit count value.

21 and 22, in step S1802, each register receives a code number of I ₇ I ₆ I ₅ I ₄ I ₃ I ₂ I ₁ I ₀ and a predetermined SF.

In step S1804, each register receives an 8-bit count value of B ₇ B ₆ B ₅ B ₄ B ₃ B ₂ B ₁ B _{0 from} an 8-bit counter.

In step S1806, the type of the predetermined SF is determined.

In step S1808, if the predetermined SF is SF ₂₅₆ , each logical operator is B ₇ I _10. B ₆ · I ₁ B ₅ · I ₂ B ₄ · I ₃ B ₃ · I ₄ B ₂ · I ₅ B ₁ · I ₆ Perform a logical operation of B ₀ · I ₇ .

In step S1810, if the predetermined SF is SF ₁₂₈ , each logical operator is B ₆ I _10. B ₅ · I ₁ B ₄ · I ₂ B ₃ · I ₃ B ₂ · I ₄ B ₁ · I ₅ Perform a logical operation of B ₀ · I ₆ .

In step S1812, if the predetermined SF is SF ₆₄ , each logical operator is B ₅ I _10. B ₄ · I ₁ B ₃ · I ₂ B ₂ · I ₃ B ₁ · I ₄ Perform a logical operation of B ₀ · I ₅ .

In step S1814, if the predetermined SF is SF ₃₂ , each logical operator is B ₄ I _10. B ₃ · I ₁ B ₂ · I ₂ B ₁ · I ₃ Perform a logical operation of B ₀ · I ₄ .

In step S1816, if the predetermined SF is SF ₁₆ , each logical operator is B ₃ I _10. B ₂ · I ₁ B _{1 2} · I Perform a logical operation of B ₀ · I ₃ .

In step S1818, if the predetermined SF is SF ₈ , each logical operator is B ₂ · I _0. B ₁ · I ₁ Perform a logical operation of B ₀ · I ₂ .

In step S1820, if the predetermined SF is SF ₄ , each logical operator is B ₁ · I _0. Perform a logical operation of B ₀ · I ₁ .

In step S1822, each multiplexer generates a spreading code in response to SF.

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

The present invention as described above, it is possible to improve the power efficiency of the terminal by reducing the PAPR in the mobile communication system.

Claims (94)

An apparatus for converting source data into a channel modulated signal having a plurality of pairs of in-phase and quadrature data in a terminal using N (where N is an integer of 2 or more), Channel coding means for coding the source data to generate (N-1) data parts and control parts; Code generation means for generating at least one spreading code assigned to the channel; And Spreading means for spreading the control portion and the data portion to generate the channel modulated signal by using the spreading code Wherein each spreading code is selected based on a data rate of the controller and the data portion, wherein the spreading codes are located at a point where two consecutive in-phase and quadrature data pairs are located at the same point or zero on a phase domain And a variable factor orthogonal spreading code in a mobile communication system, characterized in that it is selected to correspond to two symmetric points. 84. The method of claim 83 wherein The channel coding means, And spreading factor generating means for generating a spreading factor related to the data rate of said data portion. 2. An apparatus for modulating a data message using a variable factor orthogonal spreading code in a mobile communication system. The method of claim 2, The code generation means, Control means for generating a code number for the channel in response to the spreading factor; And Spreading code generating means for generating the spreading code for generating the spreading factor assigned to the channel in response to the spreading factor and the code number Apparatus for modulating a data message using a variable factor orthogonal spreading code in a mobile communication system comprising a. delete delete The method of claim 3, wherein The diffusion code generating means, Counting means for continuously calculating a count signal synchronized with a clock signal; First spreading code generating means for generating a spreading code to be assigned to the data channel in response to the count signal and the spreading factor; And Second spreading code generating means for generating a spreading code to be allocated to the control channel in response to the count signal and the spreading factor Apparatus for modulating a data message using a variable factor orthogonal spreading code in a mobile communication system comprising a. The method of claim 6, The first spreading code generating means, First logical operation means for generating the spreading code associated with the data portion by performing a logical operation using the spreading factor and the code number associated with the data portion; And First selecting means for outputting the spreading code associated with the data portion in response to a selection signal as the spreading factor associated with the data portion Apparatus for modulating a data message using a variable factor orthogonal spreading code in a mobile communication system further comprising. The method of claim 7, wherein The first logical operation means, I ₇ I ₆ I ₅ I ₄ I ₃ I ₂ I ₁ I ₀ Code number, B ₇ B ₆ B ₅ B ₄ B ₃ B ₂ B ₁ B ₀ Receives a predetermined spreading factor And a variable factor orthogonal spreading code in a mobile communication system. The method of claim 8, The first logical operation means, When the predetermined diffusion factor is 2 ^N when N is 2 to 8 Apparatus for modulating a data message using a variable factor orthogonal spreading code in a mobile communication system, characterized in that for performing a logical operation. 87. The method of claim 9 or 86, The counting means, And a ^N -bit counter when the ^2N is the maximum spreading factor. The apparatus for modulating a data message using a variable factor orthogonal spreading code in a mobile communication system. The method of claim 10, Each of the first and second logic operation means, 12. An apparatus for modulating a data message using a variable factor orthogonal spreading code in a mobile communication system comprising a plurality of AND gates and a plurality of exclusive OR gates. The method of claim 11, Each of the first and second selection means, An apparatus for modulating a data message using a variable factor orthogonal spreading code in a mobile communication system comprising multiplexers. delete delete The method of claim 3, wherein The terminal, An apparatus for modulating a data message using a variable factor orthogonal spreading code in a mobile communication system comprising at least one data channel and one control channel. The method of claim 15, The control unit is assigned to the control channel, the spreading code assigned to the control channel is represented by C256,0, 256 represents the spreading factor, 0 represents a code number is variable in the mobile communication system An apparatus for modulating data messages using factor orthogonal spreading codes. The method of claim 16, Spreading factor associated with said data unit is a 2 ^N if N is 2 to 8, the code number in the case of the data part is 2 ^N / 4, the data unit in a mobile communication system, characterized in that allocated to the data channel Apparatus for modulating data messages using variable factor orthogonal spreading codes. 92. The method of claim 92, The code generation means, Signature generation means for generating a predetermined signature; And Scrambling code generating means for generating scrambling code Apparatus for modulating a data message using a variable factor orthogonal spreading code in a mobile communication system comprising a. The method of claim 18, Code numbers associated with the data portion and the control portion are determined by the predetermined signature when the scrambling code is shared by a plurality of terminals, and the data portion and the control portion are assigned to the data channel and the control channel, respectively. Apparatus for modulating a data message using a variable factor orthogonal spreading code in a mobile communication system. The method of claim 19, The spreading factor related to the control unit is 256, and the code number associated with the control unit is 16 (S-1) + 15 when S is 1 to 16 and S is the predetermined signature. And modulate a data message using a variable factor orthogonal spreading code in. The method of claim 20, The spreading factor related to the data part is 2 ^N when N is 5 to 8, and the code number related to the data part is 2 ^N (S-1) / 16. Apparatus for modulating a data message using an orthogonal spreading code. delete The method of claim 1, The apparatus for modulating a data message using a variable factor orthogonal spreading code in a mobile communication system, characterized by generating a scrambled signal by rotating the two points by scrambling the scrambling code with the data unit and the controller. delete The method of claim 23, And one of the two points in a clockwise direction and the other in a counterclockwise direction by a phase of 45 DEG. The apparatus for modulating a data message using a variable factor orthogonal spreading code in a mobile communication system. The method of claim 25, The phase difference between the rotated point, An apparatus for modulating a data message using a variable factor orthogonal spreading code in a mobile communication system, characterized in that 90 °. delete delete delete delete delete delete 88. The method of claim 87, The spreading code allocated to the first and second data channels is And C _4,1 = {1, 1, -1, -1}, respectively, for modulating a data message using a variable factor orthogonal spreading code. The method of claim 33, wherein The spreading code allocated to the third and fourth data channels is And C _4,3 = {1, -1, -1, 1}, respectively, for modulating a data message using a variable factor orthogonal spreading code in a mobile communication system. The method of claim 34, wherein The spreading code allocated to the fifth and sixth data channels, And C _4,2 = {1, -1, 1, -1}, respectively, for modulating a data message using a variable factor orthogonal spreading code. delete delete delete delete delete delete delete A terminal for using N channels when N is a positive integer and converting source data into a channel modulated signal having a plurality of pairs of in-phase and quadrature data, Channel coding means for coding the source data to generate (N-1) data parts and control parts; Code generation means for generating N spreading codes assigned to the channel; And Spreading means for spreading the control portion and the data portion to generate the channel modulated signal by using the spreading code Wherein each spreading code is selected based on a data rate of the controller and each data portion, wherein the spreading codes are located at the same point where two consecutive in-phase and quadrature data pairs are located in a phase domain, or And a terminal selected to correspond to two points that are zero symmetric. 92. The method of claim 89, A central processing unit coupled to the channel coding means; User interface means for receiving user input data from a user; And Source data generating means coupled to said channel coding means for generating said source data; The terminal further comprising. The method of claim 43 or 44, Frequency converting means coupled to said spreading means for converting said channel modulated signal into a radio frequency signal; And Antenna for transmitting the radio frequency signal to the base station The terminal further comprising. A method for converting source data into a channel modulated signal having a plurality of pairs of in-phase and quadrature data in a terminal using N (where N is an integer of 2 or more), Coding the source data to generate at least one data portion and a control portion; Generating at least one spreading code assigned to the channel; And A third step of spreading the control unit and the data unit to generate the channel modulated signal by using the spreading code; Wherein each spreading code is selected based on a data rate of the controller and the data portion, wherein the spreading codes are located at the same point or two zero pairs of consecutive in-phase and quadrature data in the phase domain A method for modulating a data message using a variable factor orthogonal spreading code in a mobile communication system, characterized in that it is selected to correspond to two symmetric points. 92. The method of claim 90, The first step is, Coding the source data to generate the data unit and the control unit; And A fifth step of generating a spreading factor related to the data rate of the data unit Method for modulating a data message using a variable factor orthogonal spreading code in a mobile communication system comprising a. delete The method of claim 47, The sixth step, An eighth step of generating a code number for the channel in response to the spreading factor; And A ninth step of generating the spreading code assigned to the channel in response to the spreading factor and the code number Method for modulating a data message using a variable factor orthogonal spreading code in a mobile communication system comprising a. delete The method of claim 49, The ninth step, Calculating a count value synchronized with a clock signal; And A thirteenth step of performing a logical operation using the spreading factor and the code number related to the data part and the control part in response to the count value Method for modulating a data message using a variable factor orthogonal spreading code in a mobile communication system comprising a. delete The method of claim 51, wherein The code number and the count value, respectively, I ₇ I ₆ I ₅ I ₄ I ₃ I ₂ I ₁ I ₀ 8-bit signal and B ₇ B ₆ B ₅ B ₄ B ₃ B ₂ B ₁ B ₀ 8-bit signal characterized in that the mobile communication system A method for modulating data messages using variable factor orthogonal spreading codes. The method of claim 53, wherein The logical operation is, When the predetermined diffusion factor is 2 ^N when N is 2 to 8 And modulating a data message using a variable factor orthogonal spreading code in a mobile communication system. The method of claim 49, The terminal, A method for modulating a data message using a variable factor orthogonal spreading code in a mobile communication system comprising at least one data channel and one control channel. The method of claim 55, The control unit is assigned to the control channel, the spreading code assigned to the control channel is represented by C _256,0 , 256 represents a spreading factor, 0 represents a code number variable variable in a mobile communication system A method for modulating a data message using an orthogonal spreading code. The method of claim 56, wherein Spreading factor associated with said data unit is a 2 ^N if N is 2 to 8, the code number in the case of the data part is 2 ^N / 4, the data unit in a mobile communication system, characterized in that allocated to the data channel A method for modulating data messages using variable factor orthogonal spreading codes. 94. The method of claim 93, The second step, A sixteenth step of generating a predetermined signature; And 17th step of generating scrambling code Method for modulating a data message using a variable factor orthogonal spreading code in a mobile communication system comprising a. The method of claim 58, Code numbers associated with the data portion and the control portion are determined by the predetermined signature when the scrambling code is shared by a plurality of terminals, and the data portion and the control portion are assigned to the data channel and the control channel, respectively. A method for modulating a data message using a variable factor orthogonal spreading code in a mobile communication system. The method of claim 59, The spreading factor related to the control unit is 256, and the code number associated with the control unit is 16 (S-1) + 15 when S is 1 to 16 and S is the predetermined signature. A method for modulating a data message using a variable factor orthogonal spreading code in. The method of claim 60, The spreading factor related to the data part is 2 ^N when N is 5 to 8, and the code number related to the data part is 2 ^N (S-1) / 16. A method for modulating a data message using an orthogonal spreading code. delete The method of claim 46, And a method of modulating a data message using a variable factor orthogonal spreading code in a mobile communication system, wherein the scrambling code is scrambled with the data unit and the control unit to rotate the two points. delete The method of claim 63, wherein A method for modulating a data message using a variable factor orthogonal spreading code in a mobile communication system, wherein one of the two points is rotated clockwise and the other counterclockwise, respectively. The method of claim 55, The phase difference between the rotated point, A method for modulating a data message using a variable factor orthogonal spreading code in a mobile communication system, characterized in that 90 °. delete delete delete delete delete delete 92. The method of claim 91 wherein The spreading codes allocated to the first and second data channels are each C _4,1 = {1, 1, -1, -1} A method for modulating a data message using a variable factor orthogonal spreading code in a mobile communication system. The method of claim 73, wherein The spreading codes allocated to the third and fourth data channels are each C _4,3 = {1, -1, -1, 1} A method for modulating a data message using a variable factor orthogonal spreading code in a mobile communication system. The method of claim 74, wherein The spreading codes allocated to the fifth and sixth data channels are respectively: C _4,2 = {1, -1, 1, -1} A method for modulating a data message using a variable factor orthogonal spreading code in a mobile communication system. delete delete delete delete delete delete delete The method of claim 1, The spreading code, An apparatus for modulating a data message using a variable factor orthogonal spreading code in a mobile communication system, characterized in that it is a variable spreading factor (OVSF) code. The method of claim 6, The second spreading code generating means, Second logical operation means for generating the spreading code associated with the data portion by performing a logical operation using the spreading factor and the code number associated with the data portion; And Second selecting means for outputting the spreading code associated with the data portion in response to a selection signal as the spreading factor associated with the data portion Apparatus for modulating a data message using a variable factor orthogonal spreading code in a mobile communication system comprising a. 87. The method of claim 84, The second logical operation means, I ₇ I ₆ I ₅ I ₄ I ₃ I ₂ I ₁ I ₀ Code number, B ₇ B ₆ B ₅ B ₄ B ₃ B ₂ B ₁ B ₀ Receives a predetermined spreading factor And a variable factor orthogonal spreading code in a mobile communication system. 86. The method of claim 85, The second logical operation means, When the predetermined diffusion factor is 2 ^N when N is 2 to 8 Apparatus for modulating a data message using a variable factor orthogonal spreading code in a mobile communication system, characterized in that for performing a logical operation. The method of claim 15, The mobile station, Apparatus for modulating a data message using a variable factor orthogonal spreading code in a mobile communication system, characterized by using two, three, four, five, or six data channels. The method of claim 23, Filtering means for performing pulse shaping of the scrambled signal to generate a pulse shaped signal; And Gain adjusting means for adjusting a gain of each of the pulse-shaped signals Apparatus for modulating a data message using a variable factor orthogonal spreading code in a mobile communication system comprising a. The method of claim 43, The spreading code, Preferably, the terminal, characterized in that the variable diffusion factor (OVSF) code. The method of claim 46, The spreading code, Preferably, the variable spreading factor (OVSF) code, characterized in that for modulating a data message using a variable factor orthogonal spreading code in a mobile communication system. The method of claim 55, The mobile station, A method for modulating a data message using a variable factor orthogonal spreading code in a mobile communication system, characterized by using two, three, four, five, or six data channels. The method of claim 3, wherein The mobile station, An apparatus for modulating a data message using a variable factor orthogonal spreading code in a mobile communication system, comprising one data channel and one control channel for a PARCH. The method of claim 49, The mobile station, A method for modulating a data message using a variable factor orthogonal spreading code in a mobile communication system comprising one data channel and one control channel for a PARCH. The method of claim 63, wherein A fourth step of generating a pulse shaped signal by performing pulse shaping of the scrambled signal; And A fifth step of adjusting gain of each of the pulse-shaped signals Method for modulating a data message using a variable factor orthogonal spreading code in a mobile communication system further comprising.