JP5396874B2 - Terminal device, transmission power control method, and digital signal processing device - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a terminal device, a transmission power control method, and a digital signal processing device, and more particularly, to a terminal device, a transmission power control method, and a digital signal in a WCDMA (Wideband-Code Division Multiple Access) mobile phone terminal that supports HSUPA (High Speed Uplink Packet Access). The present invention relates to a signal processing device.

  In the WCDMA cellular phone terminal related to the present invention, a signal of a control channel and a data channel of DPCCH (Dedicated Physical Control Channel), DPDCH (Dedicated Physical Data Channel), and HS-DPCCH (High Speed-DPCCH) are multiplexed. doing.

  However, in 3GPP (Third Generation Partnership Project) and HSUPA (High Speed Uplink Packet Access), E-DPCCH (Enhanced-DPCCH) and E-DPDCH (Enhanced-PDCH) are further added to these signals.

  Therefore, the peak average ratio (Peak Average Ratio (hereinafter referred to as PAR)) tends to increase during HSUPA transmission for the added signal. Therefore, in 3GPP, a transmission power relaxation specification using a PAR approximate calculation formula called cubic metric (Cubic Metric (hereinafter referred to as CM)) is provided (see Non-Patent Document 1).

  This means that CM = 0 to 3.5 (0.5 dB step) is obtained according to the signal condition, and the value obtained by subtracting 1 from the CM value becomes MPR (MPR = CM−1), and the maximum transmission by this MPR. It is a specification that power can be lowered. Therefore, when the PAR is large, that is, when the CM value is large, the adjacent channel leakage power (hereinafter referred to as ACLR (Adjacent Channel Leakage Power Ratio)) characteristic can be secured by reducing the power.

  For example, if the maximum transmission power is +24 dBm (see Non-Patent Document 2) and the CM under a certain signal condition is 2.0, the MPR becomes 1.0 and the maximum transmission power can be lowered by 1.0 dB. That is, + 24−1.0 = + 23 (dBm) is the transmission power.

  FIG. 16 is a schematic explanatory diagram showing an example of a transmission power control method in a terminal device (as an example, a WCDMA mobile phone terminal) related to the present invention. The figure shows an example in which the transmission signal is composed only of DPCCH and DPDCH. From the figure, when transmitting with the related WCDMA mobile phone terminal, the transmission signal is fed back, converted into a voltage with a detection IC (Integrated Circuit), and the voltage value is converted into an AD (Analog to Digital Conversion). (Hereinafter referred to as ADC), and further averaged by a DSP (Digital Signal Processor).

  Then, the averaged value is compared with the values tabulated for each power, and if the averaged value is smaller than the value that should be the original power, the transmission power is increased, and the averaged value is the original power. If it is larger than it should be, power adjustment is performed by lowering the transmission power. This is called automatic power control (Automatic Power Control, hereinafter referred to as APC).

  FIG. 17 is a schematic explanatory diagram showing an example of a transmission power control method in another terminal device (as an example, a WCDMA mobile phone terminal) related to the present invention. The figure shows an example in which HS-DPCCH is further added as a transmission signal. From the figure, in 3GPP HSDPA, the HS-DPCCH signal is added and the value obtained by the DSP (hereinafter referred to as the APC value) is displayed due to the nature of the APC circuit even though the same power is transmitted by the signal combination. Will be different).

  However, since there are about 300 combinations of DPCCH, DPDCH, and HS-DPCCH, an APC correction table is provided for all signal combination conditions or PAR range classification and the like, that is, addition to the power-APC value table, that is, APC By correcting the transmission power, it is possible to adjust the transmission power.

  However, in 3GPP HSUPA, E-DPCCH and E-DPDCH signals are further added, and it is said that there are 3 million multiplexing combinations in DPCCH, DPDCH, HS-DPCCH, E-DPCCH and E-DPDCH signals. As with HSDPA, it is not practical to have APC correction tables for all signal combination conditions and to grasp all APC correction values.

  FIG. 18 is a schematic explanatory diagram showing an example of a transmission power control method in another terminal device (for example, a WCDMA mobile phone terminal) related to the present invention. The figure shows an example in which E-DPCCH and E-DPDCH are further added as transmission signals. Therefore, in general, the terminal device has a CM-APC correction value table as shown in FIG. For example, CM = 0 to 0.5, 0.5 to 1.0, 1.0 to 1.5, 1.5 to 2.0, 2.0 to 2.5, 2.5 to 3.0, Transmission power adjustment is performed by providing the terminal device with an APC correction table of 3.0 to 3.5 and adding an APC correction value to the power-APC value table, that is, APC correction.

  Next, an operation of an example of HSUPA transmission power correction control in the digital signal processing apparatus related to the present invention will be described. FIG. 19 is a flowchart showing an example of HSUPA transmission power correction control in the related digital signal processing apparatus. Each part of the digital signal processing apparatus shown below will be described in detail in the description of the embodiment of the present invention.

  First, the digital signal processing apparatus determines the transmission power ratio of E-DPDCH by E-TFC Selection (step S1). Here, E-TFC is an abbreviation for E-DCH Transport Format Combination, and determines the data structure of E-DCH, thereby determining how much data is transmitted at one transmission interval.

  In addition, E-TFC Selection obtains information on the maximum transmission rate (that is, maximum transmission power) allowed for the mobile terminal transmitted from the base station, and the largest transmission throughput within the range permitted by the mobile terminal from there. This is a function, ie, a block, for selecting an E-TFC that can be obtained.

  Next, the digital signal processing device obtains CM and MPR from the transmission power ratio (step S2). Next, the digital signal processing apparatus acquires the APC correction value from the obtained CM value and the CM-APC correction value table, adds it to the APC value of the transmission power-APC value table, and transmits the transmission power-APC value table. Is updated (step S3).

  For example, in the case of CM = 0.5 dB, an APC correction value 1 of CM = 0 to 0.5 dB is acquired from FIG. 18, and this is added to all APC values in the transmission power-APC value table. Next, the digital signal processing device sets a transmission power designation value (step S4). Here, for example, the transmission power designation value is 24 dBm. Next, the digital signal processing device acquires the TXAGC value from the transmission power designation value and the transmission power-TXAGC value table, and sets it in the RFIC of the RF device (step S5).

  Here, the transmission power-TXAGC value table describes the TXAGC value for setting the gain in the RFIC amplifier of the RF apparatus, and is provided for each transmission power as in the transmission power-APC value table. Next, the RF device converts the transmission signal into a DC voltage by a detection circuit, particularly a detection IC, and outputs it to the analog signal processing device (step S6). Next, the analog signal processing device AD converts the input voltage, and outputs the converted DC voltage to the digital signal processing device (step S7).

  Next, the digital signal processing apparatus averages the input DC values, sets the result as the APC value, and calculates the actual transmission power from the transmission power-APC value table (step S8). For example, if the APC value is the same as the APC value at 24 dBm in the transmission power-APC value table, it is determined that the actual transmission power is 23 dBm.

  Next, the digital signal processing apparatus calculates a difference between the designated transmission power value and the actual transmission power (step S9). Next, the digital signal processing device updates the transmission power designation value from the difference between the transmission power designation value and the actual transmission power (step S10). For example, if the transmission power designation value is 24 dBm and the actual transmission power is 23 dBm, the transmission power designation value is updated to 24 + 1 = 25 dBm because there is a difference of 1 dB. Next, returning to step S5, the processing from step S5 to step S10 is repeated during transmission.

  On the other hand, Patent Document 1 discloses an invention for reducing the peak of a multiplex modulation signal in a mobile communication terminal apparatus using gains according to three types of gain factors notified from a base station.

JP 2006-066733 A

3GPP TS25.101 Chapter 6.2.2 3GPP TS25.101 Power Class3 3GPP TS25.101 6.6.2.2 3GPP TS25.213 Chapter 4.2

  However, in the related art described in FIG. 18, the APC value obtained by the DSP is different due to the characteristics of the APC circuit despite the transmission with the same CM value and the same power. There is a problem that can not be sent in. Therefore, in the worst case, if the obtained power is larger than the expected power, the 3GPP transmission power specification (see Non-Patent Document 1) is not satisfied, the ACLR specification is not satisfied (see Non-Patent Document 3), and If wasteful power consumption is generated and the obtained power is smaller than the expected power, the 3GPP transmission specifications are not satisfied.

  Further, in the related art described in FIG. 19, the APC value acquired by the digital signal processing device is different due to the characteristics of the APC circuit, although the same CM value is transmitted with the same power, and as a result, There is a problem that transmission cannot be performed with the expected power. The cause is that the detection IC is obtained by averaging the square area of a certain section of the input Vin over time, and the output Vrms is different. On the other hand, the HSUPA signal has a different cycle in which the peak of signal power is generated. This is because the Vrms value that is output automatically differs.

  FIG. 20 is a diagram showing the relationship between the transmission power and the output Vrms value at the detection IC 134 in the related HSUPA transmission power correction control. Referring to the figure, the difference between the output voltages (Vrms) of HSUPA-A and HSUPA-B directly becomes the difference in transmission power.

  On the other hand, the invention described in Patent Document 1 is common to the present invention in that the transmission power is controlled according to the gain, but the voltage value obtained by detecting the modulation signal is at least for each number of multiplexed channels or for every IQ power ratio. Since the invention is not an invention for controlling transmission power by correcting to the above, it is another invention whose configuration is completely different from the present invention.

  Therefore, an object of the present invention is to provide a terminal device, a transmission power control method, and a digital signal processing device that can transmit with the expected power even when the combination of signals changes.

In order to solve the above problems, a terminal device according to the present invention includes an RF device that modulates and detects a multiplexed signal including a plurality of control channels and data channels, and
A correspondence table of voltage values and transmission power obtained after the detection, and a first voltage value correction table for correcting voltage values in the correspondence table for each number of multiplexed channels, and based on the first voltage value correction table, And a digital signal processing device that corrects a voltage value in the correspondence table, acquires a transmission power value corresponding to the voltage value obtained after the detection from the correspondence table, and controls the transmission power.
Another terminal apparatus according to the present invention includes an RF apparatus that modulates and detects a multiplexed signal composed of a plurality of control channels and data channels, and
A correspondence table of voltage values and transmission power obtained after the detection, and a second voltage value correction table for correcting voltage values in the correspondence table for each IQ power ratio, and based on the second voltage value correction table, And a digital signal processing device that corrects a voltage value in the correspondence table, acquires a transmission power value corresponding to the voltage value obtained after the detection from the correspondence table, and controls the transmission power.
Still another terminal device according to the present invention includes an RF device that modulates and detects a multiplexed signal composed of a plurality of control channels and data channels, and
Correspondence table of voltage values and transmission power obtained after detection, first voltage value correction table for correcting voltage values in the correspondence table for each number of multiplexed channels, and voltage values in the correspondence table for each IQ power ratio A second voltage value correction table that corrects the voltage value in the correspondence table based on the first voltage value correction table and the second voltage value correction table, and obtained from the correspondence table after the detection. And a digital signal processing device that acquires a transmission power value corresponding to the voltage value and controls the transmission power.

A transmission power control method according to the present invention includes a modulation and detection step for modulating and detecting a multiplexed signal composed of a plurality of control channels and data channels,
A correspondence table of voltage values and transmission power obtained after the detection, and a first voltage value correction table for correcting voltage values in the correspondence table for each number of multiplexed channels, and based on the first voltage value correction table, A digital signal processing step of correcting a voltage value in the correspondence table, obtaining a transmission power value corresponding to the voltage value obtained after the detection from the correspondence table, and controlling the transmission power.
Another transmission power control method according to the present invention includes a modulation and detection step for modulating and detecting a multiplexed signal composed of a plurality of control channels and data channels, and
A correspondence table of voltage values and transmission power obtained after the detection, and a second voltage value correction table for correcting voltage values in the correspondence table for each IQ power ratio, and based on the second voltage value correction table, A digital signal processing step of correcting a voltage value in the correspondence table, obtaining a transmission power value corresponding to the voltage value obtained after the detection from the correspondence table, and controlling the transmission power.
Still another transmission power control method according to the present invention includes a modulation and detection step of modulating and detecting a multiplexed signal composed of a plurality of control channels and data channels, and
Correspondence table of voltage values and transmission power obtained after detection, first voltage value correction table for correcting voltage values in the correspondence table for each number of multiplexed channels, and voltage values in the correspondence table for each IQ power ratio A second voltage value correction table that corrects the voltage value in the correspondence table based on the first voltage value correction table and the second voltage value correction table, and obtained from the correspondence table after the detection. And a digital signal processing step of acquiring a transmission power value corresponding to the voltage value and controlling the transmission power.

The digital signal processing apparatus according to the present invention also provides a correspondence table of detected voltage values and transmission power obtained from an RF apparatus that modulates and detects a multiplexed signal composed of a plurality of control channels and data channels, and the number of multiplexed channels. And a first voltage value correction table for correcting the voltage value in the correspondence table, correcting the voltage value in the correspondence table based on the first voltage value correction table, and detecting the detected voltage from the correspondence table. The transmission power value corresponding to the value is acquired to control the transmission power.
Another digital signal processing apparatus according to the present invention includes a correspondence table of detected voltage values and transmission power obtained from an RF apparatus that modulates and detects a multiplexed signal composed of a plurality of control channels and data channels, and an IQ power ratio. And a second voltage value correction table for correcting the voltage value in the correspondence table, correcting the voltage value in the correspondence table based on the second voltage value correction table, and detecting the detected voltage from the correspondence table. The transmission power value corresponding to the value is acquired to control the transmission power.
Still another digital signal processing apparatus according to the present invention includes a correspondence table of detected voltage values and transmission power obtained from an RF apparatus that modulates and detects a multiplexed signal composed of a plurality of control channels and data channels, and the number of multiplexed channels. A first voltage value correction table that corrects the voltage value in the correspondence table every time, and a second voltage value correction table that corrects the voltage value in the correspondence table for each IQ power ratio, and the first voltage value Correcting the voltage value in the correspondence table based on the correction table and the second voltage value correction table, obtaining a transmission power value corresponding to the detected voltage value from the correspondence table, and controlling the transmission power; Features.

  According to the present invention, it is possible to obtain a terminal device, a transmission power control method, and a digital signal processing device that can transmit with the expected power even if the combination of signals changes.

It is a figure which shows the operation principle of the terminal device which concerns on this invention. It is a schematic explanatory drawing which shows the concept of 1st Example of this invention. It is a block diagram of 1st Example of the terminal device which concerns on this invention. 2 is a configuration diagram of an example of an RF device 13. FIG. 3 is a configuration diagram of an example of a detection IC 134. FIG. It is a flowchart of an example of HSUPA transmission power correction | amendment control which provides a CM-APC correction value table for every multiple channel number of this invention. It is a figure which shows the relationship between the transmission power in the transmission power correction control of this invention, and the output Vrms value in detection IC134. It is a block diagram of the digital signal processing apparatus described in Non-Patent Document 4. It is a figure which shows the IQ mapping example of DPCCH and DPDCH. It is a figure which shows the relationship between transmission power and the output Vrms value in detection IC134. It is a flowchart which shows operation | movement of 2nd Example. It is a schematic explanatory drawing which shows the concept of 2nd Example of this invention. It is a flowchart which shows operation | movement of the 3rd Example of this invention. It is a schematic explanatory drawing which shows the concept of 3rd Example of this invention. It is a figure which shows an example of the weighting of the number of multiplexed channels and IQ power ratio. It is a schematic explanatory drawing which shows the concept of an example of the transmission power control method in the terminal device (an example is WCDMA) relevant to this invention. It is a schematic explanatory drawing which shows the concept of an example of the transmission power control method in the other terminal device (an example is WCDMA) relevant to this invention. It is a schematic explanatory drawing which shows the concept of an example of the transmission power control method in the other terminal device (an example is WCDMA) relevant to this invention. It is a flowchart which shows an example of the HSUPA transmission power correction | amendment control in a related digital signal processing apparatus. It is a figure which shows the relationship between the transmission power in the related HSUPA transmission power correction control, and the output Vrms value in detection IC134.

  First, the operating principle of the present invention will be described before the description of the embodiments of the present invention. FIG. 1 is a diagram illustrating an operation principle of a terminal device according to the present invention. Referring to the figure, a terminal apparatus 1 according to the present invention modulates and detects a multiplexed signal composed of a plurality of control channels and data channels, and obtains a voltage value obtained after detection at least for each number of multiplexed channels or IQ. And a digital signal processing device 11 that controls transmission power by correcting each power ratio.

  That is, according to the present invention, the transmission power is controlled by correcting the voltage value obtained after detecting the modulation signal at least for each number of multiplexed channels or IQ power ratio. It is possible to transmit with the expected power.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  FIG. 2 is a schematic explanatory view showing the concept of the first embodiment of the present invention. In the present invention, as shown in the figure, a CM-APC correction value table provided for each number of multiplexed channels is newly introduced, and a CM-APC correction value table corresponding to the number of channels at the time of transmission is converted to transmission power-APC. A method for correcting transmission power by adding, that is, APC correction to a value table is proposed.

  FIG. 3 is a block diagram of the first embodiment of the terminal device according to the present invention. The terminal device according to the present invention is, for example, an HSUPA-compliant WCDMA mobile phone terminal. Referring to FIG. 1, a terminal device 1 according to the present invention includes a CPU (Central Processing Unit) device 10, a digital signal processing device 11, an analog signal processing device 12, an RF (Radio Frequency) device 13, and a memory device. 14, a power supply device 15, a battery 16, an antenna 17, and a program storage unit 18.

  The CPU device 10 is a part that controls the digital signal processing device 11, the analog signal processing device 12, the RF device 13, the memory device 14, and the power supply device 15 and exchanges data with the digital signal processing device 11. The RF device 13 is a part that performs modulation / demodulation of a radio signal and converts a transmission signal into a DC voltage by an APC circuit.

  The analog signal processing device 12 AD-converts the signal from the RF device 13 and outputs it to the digital signal processing device 11, DA-converts the signal from the digital signal processing device 11 and outputs it to the RF device 13, and the RF device The APC voltage from 13 is AD converted and output to the digital signal processor 11.

  The digital signal processing device 11 is a part that performs digital signal processing, decodes, and sends the decoded signal to the CPU device 10. The digital signal processing device 11 performs power control of the transmission signal, performs CM and MPR calculation in HSUPA, calculates and multiplexes the signal ratio of all signals including E-DPDCH, and performs the analog signal processing device 12. The APC value is calculated by averaging the APC / AD conversion values from. Further, the digital signal processing apparatus 11 includes a transmission power-APC value table and a CM-APC correction value table for each number of multiplexed channels, and compares the acquired APC value with the corrected APC value to adjust the transmission power. This is the part to be performed.

  The memory device 14 is a part in which control information and the like are written, and is read and written according to the control of the CPU device 10. The power supply device 15 is a part that supplies power to the CPU device 10, the digital signal processing device 11, the analog signal processing device 12, the RF device 13, and the memory device 14 in accordance with control from the CPU device 10. The battery 16 is a part that supplies a voltage to the entire device via the power supply device 15. The antenna 17 is a part that receives a signal from the base station and transmits a signal from the own terminal to the base station. The program storage unit 18 stores a transmission power control method program to be described later.

  Next, the configuration of the RF device 13 will be described. FIG. 4 is a configuration diagram of an example of the RF device 13. Referring to the figure, the RF device 13 includes an antenna switch 131, a duplexer 132, an isolator 133, a detection IC 134, an LPF (Low Pass Filter) 135, a PA (Power Amplifier) 136, and a BPF (Band Pass Filter). 137, RFIC 138, BPF 139, and LNA (Low Noise Amplifier) 140.

  The antenna switch 131 is a part for switching the antenna to be used. The duplexer 132 is a filter that separates a transmission signal and a reception signal. The isolator 133 is a part for preventing a high power signal from flowing backward. The detection IC 134 is a part that converts a transmission signal into a DC voltage. The LPF 135 is a filter for attenuating DC voltage noise. The PA 136 is an amplifier capable of amplifying to high power. The BPF 137 is a filter that attenuates other than the transmission signal.

  The RFIC 138 includes a signal modulation / demodulation circuit, a transmission and reception gain variable amplifier, a baseband filter, an amplifier, and a PLL (Phase Locked Loop) synthesizer. The BPF 139 is a filter that attenuates other than the received signal. The LNA 140 is an amplifier that amplifies a signal while suppressing noise as much as possible. The detection IC 134 and the LPF 135 constitute an APC circuit 150.

  Next, the configuration of the detection IC 134 will be described. FIG. 5 is a configuration diagram of an example of the detection IC 134. Referring to the figure, the detection IC 134 includes a capacitor 1341, squarers 1342 and 1343, resistors 1344 and 1345, an error amplifier 1346, a capacitor 1347, a buffer 1348, and a resistor 1349. An effective value (Vrms) is output based on the following equation (1) with respect to the transmission signal (Vin).

  Next, the operation of the first embodiment will be described. FIG. 6 is a flowchart of an example of HSUPA transmission power correction control in which a CM-APC correction value table is provided for each number of multiplexed channels according to the present invention. FIG. 7 is a transmission power in the transmission power correction control according to the present invention and an output Vrms value at the detection IC 134. It is a figure which shows the relationship. In FIG. 7, all signal conditions have the same CM value, and the Vrms value tends to decrease as the number of multiplexed channels increases. It is not shown that if the CM value is the same and the number of multiplexed channels is 7, the Vrms value exactly the same as the HSUPA-channel number 7 in FIG. 7 can be obtained, but the VSUP of the HSUPA-channel number 7 in FIG. It shows that there is a tendency to obtain a value.

  First, the digital signal processing apparatus 11 determines the E-DPDCH transmission power ratio and the number of multiplexed channels by E-TFC Selection (step S11). Next, the digital signal processing apparatus 11 obtains CM and MPR from the transmission power ratio (step S12). Next, the digital signal processing apparatus 11 first selects a CM-APC correction value table having the same number of channels from the obtained CM value and the number of multiplexed channels, acquires an APC correction value from the CM-APC correction value table, It is added to the APC value in the transmission power-APC value table to update the transmission power-APC value table (step S13).

  For example, when CM = 0.5 dB and the number of multiplexed channels is 7, a CM-APC correction value table for multiple channels 7 is selected from FIG. 2, and an APC correction value 1 of CM = 0 to 0.5 dB is acquired from the table. And added to all the APC values in the transmission power-APC value table. Next, the digital signal processing device 11 sets a transmission power designation value (step S14).

  Next, the digital signal processing device 11 acquires the TXAGC value from the transmission power designation value and the transmission power-TXAGC value table, and sets it in the RFIC 138 of the RF device 13 (step S15). Next, the RF device 13 converts the transmission signal into a DC voltage by a detection circuit, particularly the detection IC 134, and outputs the DC voltage to the analog signal processing device 12 (step S16). Next, the analog signal processing device 12 averages the input AD values and outputs them to the digital signal processing device 11 (step S17).

  Next, the digital signal processing apparatus 11 averages the input AD values, sets the result as an APC value, and calculates the actual transmission power from this and the transmission power-APC value table (step S18). Next, the digital signal processing apparatus 11 calculates the difference between the designated transmission power value and the actual transmission power (step S19). Next, the digital signal processing device 11 updates the transmission power designation value from the difference between the transmission power designation value and the actual transmission power (step S20). Next, the process returns to step S15, and steps S15 to S20 are repeated during transmission.

  As described above, according to the first embodiment of the present invention, even when the voltage output from the detection IC 134 is different even with the same CM value, the difference is obtained by providing a CM-APC correction value table for each number of multiple channels. As a result, it is possible to obtain the expected transmission power, and as a result, it is possible to avoid problems such as wasteful transmission power consumption and the failure to satisfy the 3GPP transmission power specification and the 3GPP ACLR specification. .

  Next, a second embodiment of the present invention will be described. The second embodiment of the present invention differs from the first embodiment in that a CM-APC correction value table is provided for each IQ power ratio. Here, the IQ power ratio is a power difference between DPCCH, DPDCH, HS-DPCCH, E-DPCCH, and E-DPDCH1 to E-DPDCH4 that are signal-mapped to I or Q.

  FIG. 8 is a configuration diagram of the digital signal processing apparatus described in Non-Patent Document 4. Referring to the figure, in the digital signal processing device 11, each control channel and data channel are mapped to either I or Q having a phase difference of 90 degrees, and finally synthesized (for details, see Non-Patent Document 4). See). Here, Sdpdch, n is a scramble code.

  FIG. 9 is a diagram illustrating an IQ mapping example of the DPCCH and DPDCH. The figure shows an IQ mapping example of DPCCH and DPDCH. That is, DPCCH is always mapped to Q, and if there is only one DPDCH, DPDCH is mapped to I (see Non-Patent Document 4 for details).

  Here, C is a channelization code, β is a signal ratio, and j is a phase rotation by 90 degrees. HS-DPCCH, E-DPCCH, E-DPDCH1 to E-DPDCH4 are also mapped to I or Q depending on the number of DPDCH and the presence or absence of HS-DPCCH (see Non-Patent Document 4 for details).

  For example, there are 5 channels of DPCCH, DPDCH, HS-DPCCH, E-DPCCH and E-DPDCH1, DPDCH, E-DPCCH and E-DPDCH1 are mapped to I, DPCCH and HS-DPCCH are mapped to Q, and the signal ratio is DPCCH: If DPDCH: HS-DPCCH: E-DPCCH: E-DPDCH1 = 15: 15: 15: 8: 60, then the IQ power ratio is | 10 × log ((15 ^ 2 + 8 ^ 2 + 60 ^ 2) / (15 ^ 2 + 15 ^ 2)) | = | 9.36 dB | = 9.36 dB.

  FIG. 10 is a diagram showing the relationship between the transmission power and the output Vrms value at the detection IC 134. In the figure, all signal conditions have the same CM value, and the Vrms value tends to decrease as the IQ power ratio increases. When the number of multiplexed channels increases, the IQ power ratio is likely to increase, so that it is almost equivalent to FIG. 7, but on the other hand, only the Q is mapped (for example, there are two channels of DPCCH and HS-DPCCH, Q Only when DPCCH and HS-DPCCH are mapped and signal ratio is DPCCH: DPDCH: HS-DPCCH = 15: 0: 15), there are cases where the Vrms value is small even if the number of multiple channels is small. This is achieved by providing a CM-APC correction value table with IQ power ratios instead of numbers.

  FIG. 11 is a flowchart showing the operation of the second embodiment. Referring to the figure, first, the digital signal processing apparatus 11 determines the transmission power ratio of E-DPDCH by E-TFC Selection, and obtains the IQ power ratio from the power ratio (step S21). Next, the digital signal processing apparatus 11 obtains CM and MPR from the transmission power ratio (step S22). Next, the digital signal processing apparatus 11 first selects a CM-APC correction value table having the same IQ power ratio from the obtained CM value and IQ power ratio, and acquires an APC correction value from the CM-APC correction value table. Then, it is added to the APC value of the transmission power-APC value table to update the transmission power-APC value table (step S23).

  FIG. 12 is a schematic explanatory view showing the concept of the second embodiment of the present invention. For example, when CM = 0.5 dB and IQ power ratio is mapped only to Q, a CM-APC correction value table for only the Q signal is selected from the figure, and APC correction value 1 of CM = 0 to 0.5 dB is selected from the table. Is added to all the APC values in the transmission power-APC value table.

  Next, returning to FIG. 11, the digital signal processing apparatus 11 sets a transmission power designation value (step S24). Next, the digital signal processing apparatus 11 acquires the TXAGC value from the transmission power designation value and the transmission power-TXAGC value table, and sets it in the RFIC 138 of the RF apparatus 13 (step S25).

  Next, the RF device 13 converts the transmission signal into a DC voltage by a detection circuit, particularly the detection IC 134, and outputs the DC voltage to the analog signal processing device 12 (step S26). Next, the analog signal processing device 12 AD-converts the input voltage and outputs it to the digital signal processing device 11 (step S27). Next, the digital signal processing apparatus 11 averages the input AD values, sets the result as the APC value, and calculates the actual transmission power from this and the transmission power-APC value table (step S28).

  Next, the digital signal processing apparatus 11 calculates a difference between the transmission power designation value and the actual transmission power (step S29). Next, the digital signal processing apparatus 11 updates the transmission power designation value from the difference between the transmission power designation value and the actual transmission power (step S30). Next, returning to step S25, steps S25 to S30 are repeated during transmission.

  As described above, according to the second embodiment of the present invention, even when the voltage output from the detection IC 1300-4 is different even with the same CM value, by providing a CM-APC correction value table for each IQ power ratio, Since the difference can be corrected, the expected transmission power can be obtained, and as a result, it is possible to avoid problems such as wasteful transmission power consumption, 3GPP transmission power specifications, and 3GPP ACLR specifications not being satisfied.

  Next, a third embodiment of the present invention will be described. FIG. 13 is a flowchart showing the operation of the third embodiment of the present invention. In the third embodiment of the present invention, a CM-APC correction value table is provided for each number of multiplexed channels and IQ power ratio, and each APC correction value is weighted and added to the CM-APC value table. Different from the second embodiment.

  In general, when the number of multiplexed channels is small, the voltage Vrms output from the detection IC 134 tends to be high and less variable. However, there are two channels of DPCCH and HS-DPCCH, and only DPCCH and HS-DPCCH are included in Q. This is because there is an exceptional case where Vrms decreases when the IQ power ratio is extremely large as in the case where the signal ratio is DPCCH: DPDCH: HS-DPCCH = 15: 0: 15.

  In this case, the APC correction value from the CM-APC correction value table based on the IQ power ratio is used, and other than that, the APC correction value in the CM-APC correction value table for the number of multiple channels can be reflected as much as possible.

  From FIG. 13, first, the digital signal processing apparatus 11 determines the E-DPDCH transmission power ratio and the number of multiplexed channels by E-TFC Selection, and obtains the IQ power ratio from the power ratio (step S31). Next, the digital signal processing device 11 obtains CM and MPR from the transmission power ratio (step S32).

  FIG. 14 is a schematic explanatory diagram showing the concept of the third embodiment of the present invention, and FIG. 15 is a diagram showing an example of weighting of the number of multiple channels and IQ power ratio. Next, from FIG. 14 and FIG. 15, the digital signal processing apparatus 11 first selects a CM-APC correction value table having the same number of multiplexed channels from the obtained CM value, the number of multiplexed channels, and the IQ power ratio, and the IQ power. A CM-APC correction value table having a matching ratio is selected, and an APC correction value is acquired from each CM-APC correction value table.

  Next, returning to FIG. 13, the weighting W1 and the weighting W2 are obtained from the number of multiplexed channels and the IQ power ratio, the APC correction value in the CM-APC correction value table having the same number of multiplexed channels is multiplied by W1, and IQ The transmission power-APC value table is updated by multiplying the APC correction value of the CM-APC correction value table having the same power ratio by W2, summing the results, and adding the result to the APC value of the transmission power-APC value table ( Step S33).

  For example, when mapping is only CM = 0.5 dB, the number of multiplexed channels is 2, and the IQ power ratio is Q only, W1 = 0 and W2 = 1.0. Therefore, the IQ power ratio CM = 0 to 0.5 dB. The APC correction value 1 is added to all the APC values in the transmission power-APC value table.

  Next, the digital signal processing apparatus 11 sets a transmission power designation value (step S34). Next, the digital signal processing device 11 acquires the TXAGC value from the transmission power designation value and the transmission power-TXAGC value table, and sets it in the RFIC 138 of the RF device 13 (step S35). Next, the RF device 13 converts the transmission signal into a DC voltage by a detection circuit, particularly the detection IC 134, and outputs the DC voltage to the analog signal processing device 12 (step S36).

  Next, the analog signal processing device 12 AD-converts the input voltage and outputs it to the digital signal processing device 11 (step S37). Next, the digital signal processing apparatus 11 averages the input AD values, sets the result as an APC value, and calculates the actual transmission power from this and the transmission power-APC value table (step S38).

  Next, the digital signal processing device 11 calculates a difference between the transmission power designation value and the actual transmission power (step S39). Next, the digital signal processing apparatus 11 updates the transmission power designation value from the difference between the transmission power designation value and the actual transmission power (step S40). Next, returning to step S35, steps S35 to S40 are repeated during transmission.

  As described above, according to the third embodiment of the present invention, a CM-APC correction value table is created for each number of multiple channels and IQ power ratio even when the voltage output from the detection IC 1300-4 is different even with the same CM value. By providing the difference, the difference can be corrected, so that the expected transmission power can be obtained. As a result, the problem of wasteful transmission power consumption, the 3GPP transmission power specification, and the 3GPP ACLR specification not being satisfied can be avoided. It becomes possible.

  Next, a fourth embodiment of the present invention will be described. The fourth embodiment of the present invention relates to a program for a transmission power control method. As shown in FIG. 3, the terminal device 1 according to the present invention includes a program storage unit 18. The program storage unit 18 stores a program for the transmission power control method shown in the flowcharts of FIGS. 6, 11, and 13. The CPU device (“computer”) 10 reads these programs from the program storage unit 18 and controls the digital signal processing device 11 according to the programs. Since the contents of the control have already been described, description thereof is omitted here.

  As described above, according to the fourth embodiment of the present invention, it is possible to obtain a transmission power control method program capable of transmitting with the expected power even when the combination of signals changes.

10 CPU device
11 Digital signal processor
12 Analog signal processor
13 RF equipment
14 Memory device
15 Power supply
16 battery
17 Antenna
18 Program storage
131 Antenna switch
132 Duplexer
133 Isolator
134 Detection IC
135 LPF
136 PA
137 BPF
138 RFIC
139 BPF
140 LNA
1341, 1347 Capacitor 1342, 1343 Squarer 1344, 1345 Resistance
1346 error amplifier
1348 buffer
1349 resistance

Claims (15)

An RF device for modulating and detecting a multiplexed signal comprising a plurality of control channels and data channels;
A correspondence table of voltage values and transmission power obtained after the detection, and a first voltage value correction table for correcting voltage values in the correspondence table for each number of multiplexed channels, and based on the first voltage value correction table, And a digital signal processing device that corrects a voltage value in the correspondence table, acquires a transmission power value corresponding to the voltage value obtained after the detection from the correspondence table, and controls the transmission power. . An RF device for modulating and detecting a multiplexed signal comprising a plurality of control channels and data channels;
A correspondence table of voltage values and transmission power obtained after the detection, and a second voltage value correction table for correcting voltage values in the correspondence table for each IQ power ratio, and based on the second voltage value correction table, end by correcting the voltage value in the corresponding table, you comprising the said correspondence table from the acquired transmission power value corresponding to the voltage value obtained after the detection controlling the transmission power digital signal processor End device. An RF device for modulating and detecting a multiplexed signal comprising a plurality of control channels and data channels;
Correspondence table of voltage values and transmission power obtained after detection, first voltage value correction table for correcting voltage values in the correspondence table for each number of multiplexed channels, and voltage values in the correspondence table for each IQ power ratio A second voltage value correction table that corrects the voltage value in the correspondence table based on the first voltage value correction table and the second voltage value correction table, and obtained from the correspondence table after the detection. end terminal device you; and a digital signal processing apparatus for controlling transmission power to obtain the transmit power value corresponding to the voltage value. The voltage correction table CM (Cubic Metric) values and the terminal device according to any one of claims 1 to 3, characterized in that composed of the voltage correction value corresponding to the CM values. The IQ power ratio in phase 90 degrees from I, the terminal apparatus according to claim 2 or 3, wherein it is a power difference between signals mapped control channel and the data channel to one of the Q. A modulation and detection step for modulating and detecting a multiplexed signal comprising a plurality of control channels and data channels;
A correspondence table of voltage values and transmission power obtained after the detection, and a first voltage value correction table for correcting voltage values in the correspondence table for each number of multiplexed channels, and based on the first voltage value correction table, And a digital signal processing step of correcting a voltage value in the correspondence table, obtaining a transmission power value corresponding to the voltage value obtained after the detection from the correspondence table, and controlling the transmission power. Control method. A modulation and detection step for modulating and detecting a multiplexed signal comprising a plurality of control channels and data channels;
A correspondence table of voltage values and transmission power obtained after the detection, and a second voltage value correction table for correcting voltage values in the correspondence table for each IQ power ratio, and based on the second voltage value correction table, And a digital signal processing step of correcting a voltage value in the correspondence table, obtaining a transmission power value corresponding to the voltage value obtained after the detection from the correspondence table, and controlling the transmission power. Control method. A modulation and detection step for modulating and detecting a multiplexed signal comprising a plurality of control channels and data channels;
Correspondence table of voltage values and transmission power obtained after detection, first voltage value correction table for correcting voltage values in the correspondence table for each number of multiplexed channels, and voltage values in the correspondence table for each IQ power ratio A second voltage value correction table that corrects the voltage value in the correspondence table based on the first voltage value correction table and the second voltage value correction table, and obtained from the correspondence table after the detection. digital signal processing step and the transmission power control method Carriage you comprising a controlling transmission power to obtain the transmit power value corresponding to the voltage value. 9. The transmission power control method according to claim 6, wherein the voltage value correction table includes a CM (Cubic Metric) value and a voltage correction value corresponding to the CM value . The IQ power ratio is the transmission power control method according to claim 7 or 8, wherein the phase is a power difference of 90 degrees from I, control channels and data channels that are signal mapped to one of the Q. Correspondence table of detected voltage value and transmission power obtained from an RF device that modulates and detects a multiplexed signal composed of a plurality of control channels and data channels, and corrects the voltage value in the correspondence table for each number of multiplexed channels. A first voltage value correction table, correcting a voltage value in the correspondence table based on the first voltage value correction table, and obtaining a transmission power value corresponding to the voltage value after detection from the correspondence table. A digital signal processing apparatus for controlling transmission power. Correspondence table of detected voltage value and transmission power obtained from an RF device that modulates and detects a multiplexed signal composed of a plurality of control channels and data channels, and corrects the voltage value in the correspondence table for each IQ power ratio. A second voltage value correction table, correcting a voltage value in the correspondence table based on the second voltage value correction table, and obtaining a transmission power value corresponding to the detected voltage value from the correspondence table; A digital signal processing apparatus for controlling transmission power. Correspondence table of detected voltage value and transmission power obtained from an RF device that modulates and detects a multiplexed signal composed of a plurality of control channels and data channels, and corrects the voltage value in the correspondence table for each number of multiplexed channels. A first voltage value correction table; and a second voltage value correction table for correcting a voltage value in the correspondence table for each IQ power ratio, and based on the first voltage value correction table and the second voltage value correction table. A digital signal processing apparatus that corrects a voltage value in the correspondence table, acquires a transmission power value corresponding to the voltage value after detection from the correspondence table, and controls transmission power. 14. The digital signal processing apparatus according to claim 11, wherein the voltage value correction table includes a CM (Cubic Metric) value and a voltage correction value corresponding to the CM value . 14. The digital signal processing apparatus according to claim 12, wherein the IQ power ratio is a power difference between a control channel and a data channel that are signal-mapped to either I or Q having a phase difference of 90 degrees .

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