CN101674640A - CDMA mobile terminal and method for controlling transmitting power thereof - Google Patents
CDMA mobile terminal and method for controlling transmitting power thereof Download PDFInfo
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- CN101674640A CN101674640A CN200910195059A CN200910195059A CN101674640A CN 101674640 A CN101674640 A CN 101674640A CN 200910195059 A CN200910195059 A CN 200910195059A CN 200910195059 A CN200910195059 A CN 200910195059A CN 101674640 A CN101674640 A CN 101674640A
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- detection module
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Abstract
The invention discloses a code division multiple access (CDMA) mobile terminal and a method for controlling the transmitting power thereof. The CDMA mobile terminal comprises a radio frequency unit and a base band unit, wherein, the base band unit comprises a micro processing controller and a memory; the radio frequency unit comprises an antenna, a duplexer, a power amplifier, a transmitting filter, a receiving filter and a low noise amplifier; the duplexer is connected with the antenna, the output end of the power amplifier and the input end of the low noise amplifier respectively; the inputend of the power amplifier is connected with the transmitting filter; the output end of the low noise amplifier is connected with the receiving amplifier; and the CDMA mobile terminal does not comprise a power detection circuit. The invention dispenses with not only components, but also the step for calibrating the power detection circuit, thereby greatly reducing the production time and production cost, improving the production efficiency, reducing the procedures for outputting the CDMA mobile terminal and improving the productivity output.
Description
Technical field
The present invention relates to a kind of cdma mobile terminal and a kind of method of controlling this mobile terminal emitting power.
Background technology
CDMA (code division multiple access) is a kind of multiple access interconnection technique of utilizing band-limited electric wave that a plurality of users can be communicated by letter simultaneously.It can solve the problem of distance affects speech quality by the transmitting power of control cdma mobile terminal.As shown in Figure 1, cdma mobile terminal of the prior art all is provided with power-sensing circuit and coupler, the input of described coupler is connected with the output of cdma mobile terminal power amplifier, the output of described coupler is connected with the duplexer of described cdma mobile terminal, and the coupled end of described coupler is connected with described power-sensing circuit.This portable terminal of the prior art, by open loop estimate and utilize described power-sensing circuit realize in the ring closed power detect, thereby realize the adjusted in concert of mobile terminal emitting power, i.e. power control.Principle is as follows: described power amplifier sends to described coupler with radiofrequency signal, through the coupling of coupler, exports a coupling value, and this coupling value is sent to described power-sensing circuit.The coupling value of described coupler output is big more, and the radiofrequency signal power that is sent to described power-sensing circuit is big more.Described power-sensing circuit is according to the radiofrequency signal size that receives, and wave detector sends to baseband chip with the voltage signal of its output and handles, thereby judges the value of the radio-frequency emission power of current mobile terminal.
The concrete mode that CDMA of the prior art carries out power detection and control is as follows: described portable terminal comprises microprocessor controller, power-sensing circuit (HDET), first register (TX_GAIN_LIMIT) and second register (TX_GAIN_CTL); Preserve the default value of calibration value tabulation in described second register as this second register.Described calibration value tabulation comprises the initial linear calibration value of power-sensing circuit (HDET) under each emitting power grade.Be that at first this portable terminal sets the maximum power transmission value, simultaneously this value be kept in described first register initial value as this first register.When this portable terminal is in running order, can open loop control, signal to corresponding base station is estimated, default value by described second register, the estimated value of a transmitting power of this portable terminal output after the coupler directional attenuation, is input in the power-sensing circuit (HDET), the output power value of this power-sensing circuit as sample, is compared with respective value in the described calibration value tabulation.Like this, utilize the sampled value of described power-sensing circuit (HDET) to compare with the default value in described second register, obtain a deviate, simultaneously regulate this deviate by first register, thereby make radio-frequency emission power value of accurately mating of this portable terminal output, promptly realize power control with described base station.
Yet, the method of this cdma mobile terminal of the prior art and power control thereof, need be in the production process of this portable terminal, under each emitting power grade, calibrate, obtain above-mentioned calibration value tabulation, so just cause this portable terminal production stage complicated, research and development and production cycle are long, the cost height.In addition, described power-sensing circuit is subjected to the interference from other circuit easily, causes the portable terminal job insecurity, puts to no little inconvenience to the user.
Summary of the invention
The purpose of this invention is to provide a kind of cdma mobile terminal and control the method for its transmitting power.
A kind of cdma mobile terminal comprises radio frequency unit and Base Band Unit, and described Base Band Unit comprises microprocessor controller and memory, described radio frequency unit comprises antenna (1), duplexer (4), power amplifier (3), emission filter (5), receiving filter (6) and low noise amplifier (2); Described duplexer (4) is connected respectively with the output of described antenna (1), described power amplifier (3) and the input of described low noise amplifier (2); The input of described power amplifier (3) is connected with described emission filter (5); The output of described low noise amplifier (2) is connected with described receiving filter (6); Described cdma mobile terminal does not comprise power-sensing circuit.
A kind of method that is used to control the cdma mobile terminal transmitting power is characterized in that in turn including the following steps:
Be used to open the step of ADC channel; Be used for step that the hardware match circuit is debugged; Be used for step that maximum transmission power is compensated.
Following form is a cdma mobile terminal provided by the present invention, in the 800MHz frequency range, and the result who under 25 ℃ ,-30 ℃ and 60 ℃ of temperature conditions, tests respectively:
By above-mentioned test data, cdma mobile terminal provided by the present invention can be described and control the method for its transmitting power, no matter be the flatness of maximum transmission power or each interchannel of radio frequency, all can reach industry set quota.This test result shows that the difference of the maximum transmission power of interchannel is no significant difference at normal temperatures, tests under maximum temperature and minimum temperature, and this difference is no more than 1.2dBm.Like this, both save the device in the cdma mobile terminal, saved the calibration steps of power-sensing circuit again, saved production time and production cost greatly, also improved production efficiency, reduced the link of cdma mobile terminal output, improved production capacity output.In addition, owing to reduced power-sensing circuit and coupler on the circuit design, reduced the failure rate of cdma mobile terminal, maintenance cost also reduces greatly.
Description of drawings
Figure 1 shows that cdma mobile terminal radio frequency unit structural representation in the prior art;
Figure 2 shows that cdma mobile terminal radio frequency unit structural representation of the present invention.
Embodiment
As described in Figure 2, a kind of cdma mobile terminal comprises radio frequency unit and Base Band Unit, described Base Band Unit comprises microprocessor controller and memory, and described radio frequency unit comprises antenna 1, duplexer 4, power amplifier 3, emission filter 5, receiving filter 6 and low noise amplifier 2; Described duplexer 4 is connected respectively with the output of described antenna 1, described power amplifier 3 and the input of described low noise amplifier 2; The input of described power amplifier 3 is connected with described emission filter 5; The output of described low noise amplifier 2 is connected with described receiving filter 6; Described cdma mobile terminal does not comprise power-sensing circuit.
Described cdma mobile terminal does not comprise coupler.
Described Base Band Unit also comprises ADC Channel and is used to detect the temperature sensing circuit of radio-frequency (RF) power amplification; Described temperature sensing circuit is arranged on the mainboard of this cdma mobile terminal; Described ADC Channel comprises analog to digital conversion circuit and register, and analog-digital conversion circuit as described is connected with described temperature sensing circuit, and described register one end connects analog-digital conversion circuit as described and the other end is connected with microprocessor controller.
Described ADC Channel is used for measuring the voltage of described temperature sensing circuit and this voltage signal is carried out being kept at described register after the analog-to-digital conversion, microprocessor controller can read the numerical value in this register, like this, get final product the working temperature situation of described cdma mobile terminal.
A kind of method that is used to control above-mentioned cdma mobile terminal transmitting power in turn includes the following steps:
Be used to open the step of ADC channel; Make described ADC Channel in running order.Like this, when described hardware match circuit is debugged, can control and regulate maximum transmit power value under all temps according to the output valve of described ADC Channel.
Be used for step that the hardware match circuit is debugged; Like this, can guarantee flatness at the maximum transmission power of each interchannel of transmit frequency band.It will be understood by those skilled in the art that described flatness is meant under the test condition of regulation, the extent of deviation of the output power value size of each channel in the described frequency range, described flatness is good more, and then this cdma mobile terminal is good more in the performance of power output facet.
Be used for step that maximum transmission power is compensated;
Further, the described step that maximum transmission power is compensated of being used for comprises the step of the initial value of the register that is used to be provided with this portable terminal.It will be understood by those skilled in the art that can be by revising the initial value of realizing being provided with described register with the parameter value of the corresponding software code of described register.In cdma mobile terminal provided by the present invention, the initial value of the register corresponding with it can be set by the parameter value of revising the NV420 item in software code, be operated under the high gain state in order to the radio-frequency (RF) power amplification of regulating transmitter, power under each temperature is operated in more than or equal in 16dBm and the scope smaller or equal to 28dBm as portable terminal; The initial value of the register corresponding with it can be set by the parameter value of revising the NV136 item in software code,, as be limited to 24dBm in order to the max threshold power of adjusting portable terminal under each temperature.
The described step that maximum transmission power is compensated of being used for comprises the maximum transmission power under at least one temperature conditions is compensated.Described microprocessor controller can read the initial value of described NV136 item and pairing two registers of NV420 item respectively, and controls the maximum transmission power size of described portable terminal according to the described initial value of these two registers.
The described method that is used to control above-mentioned cdma mobile terminal transmitting power does not comprise the step that is used to calibrate power-sensing circuit.Like this, in the production process of this cdma mobile terminal, the time that is used for the transmit frequency band calibration can be saved, faster production can be enhanced productivity.
Before being used to open the step of ADC channel, also comprise the steps:
Be used to detect the step whether this cdma mobile terminal comprises power detection module,, then be used to delete the step of this power detection module when testing result comprises described power detection module for this cdma mobile terminal; When testing result does not comprise described power detection module for this cdma mobile terminal, then directly be used to open the step of ADC channel.
Before being used to open the step of ADC channel, also comprise the steps:
Be used to detect the step whether this cdma mobile terminal comprises power detection module,, then be used to control the step that this power detection module is in disarmed state when testing result comprises described power detection module for this cdma mobile terminal; When testing result does not comprise described power detection module for this cdma mobile terminal, then directly be used to open the step of ADC channel.
Above-mentionedly be used to delete the step of this power detection module and be used to control the step that this power detection module is in disarmed state, the mode of software code that all can be by deleting described cdma mobile terminal realizes.
For example, can utilize deletion " rf_hdet_data=(byte) adc_read (ADC_HDET) " software code to realize deleting power detection module; Perhaps by utilizing deletion " rf_125_ms_isr () " software code to realize that the power controlling detection module is in disarmed state.
The described step that maximum transmission power is compensated of being used for comprises the maximum transmission power under at least one temperature conditions is compensated.
After the described step that is used for maximum transmission power is compensated, also comprise the step that the printed circuit board (PCB) (PCBA, Printed Circuit Board Assembly) that is used for this cdma mobile terminal detects.Described printed circuit board (PCB) (the PCBA that is used for this cdma mobile terminal, Printed Circuit Board Assembly) detects, comprise that radio-frequency (RF) index detects and baseband functions detects, purpose is whether further understand every performance of this cdma mobile terminal product up to standard, to meet the requirement of production.
Claims (9)
1, a kind of cdma mobile terminal, it is characterized in that: comprise radio frequency unit and Base Band Unit, described Base Band Unit comprises microprocessor controller and memory, described radio frequency unit comprises antenna (1), duplexer 4, power amplifier (3), emission filter (5), receiving filter (6) and low noise amplifier (2); Described duplexer 4 is connected respectively with the output of described antenna (1), described power amplifier (3) and the input of described low noise amplifier (2); The input of described power amplifier (3) is connected with described emission filter (5); The output of described low noise amplifier (2) is connected with described receiving filter (6); Described cdma mobile terminal does not comprise power-sensing circuit.
2, cdma mobile terminal as claimed in claim 1 is characterized in that: described cdma mobile terminal does not comprise coupler.
3, cdma mobile terminal as claimed in claim 2 is characterized in that: described Base Band Unit also comprises ADC Channel and is used to detect the temperature sensing circuit of radio-frequency (RF) power amplification; Described temperature sensing circuit is arranged on the mainboard of this cdma mobile terminal; Described ADC Channel comprises analog to digital conversion circuit and register, and analog-digital conversion circuit as described is connected with described temperature sensing circuit, and described register one end connects analog-digital conversion circuit as described and the other end is connected with microprocessor controller.
4, a kind of method that is used to control the cdma mobile terminal transmitting power is characterized in that in turn including the following steps:
Be used to open the step of ADC channel;
Be used for step that the hardware match circuit is debugged;
Be used for step that maximum transmission power is compensated.
5, the method that is used to control the cdma mobile terminal transmitting power as claimed in claim 4 is characterized in that: the described step that maximum transmission power is compensated of being used for comprises the step of the initial value of the register that is used to be provided with this portable terminal.
6, as claim 4 or the 5 described methods that are used to control the cdma mobile terminal transmitting power, it is characterized in that: do not comprise the step that is used to calibrate power-sensing circuit.
7, the method that is used to control the cdma mobile terminal transmitting power as claimed in claim 6 is characterized in that, before being used to open the step of ADC channel, also comprises the steps:
Be used to detect the step whether this cdma mobile terminal comprises power detection module,, then be used to delete the step of this power detection module when testing result comprises described power detection module for this cdma mobile terminal; When testing result does not comprise described power detection module for this cdma mobile terminal, then directly be used to open the step of ADC channel.
8, the method that is used to control the cdma mobile terminal transmitting power as claimed in claim 6 is characterized in that, before being used to open the step of ADC channel, also comprises the steps:
Be used to detect the step whether this cdma mobile terminal comprises power detection module,, then be used to control the step that this power detection module is in disarmed state when testing result comprises described power detection module for this cdma mobile terminal; When testing result does not comprise described power detection module for this cdma mobile terminal, then directly be used to open the step of ADC channel.
9, the method that is used to control the cdma mobile terminal transmitting power as claimed in claim 6, it is characterized in that: after the described step that is used for maximum transmission power is compensated, also comprise being used for the step that the printed circuit board (PCB) to this cdma mobile terminal detects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910195059A CN101674640A (en) | 2009-09-03 | 2009-09-03 | CDMA mobile terminal and method for controlling transmitting power thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910195059A CN101674640A (en) | 2009-09-03 | 2009-09-03 | CDMA mobile terminal and method for controlling transmitting power thereof |
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| CN101674640A true CN101674640A (en) | 2010-03-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200910195059A Pending CN101674640A (en) | 2009-09-03 | 2009-09-03 | CDMA mobile terminal and method for controlling transmitting power thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106646013A (en) * | 2016-09-19 | 2017-05-10 | 宇龙计算机通信科技(深圳)有限公司 | Radio frequency emission access fault detection apparatus and method and mobile terminal |
| CN108092688A (en) * | 2018-01-02 | 2018-05-29 | 广州吉欧电子科技有限公司 | A kind of high-power data transmission transmitting-receiving radio station |
| CN112954729A (en) * | 2021-04-08 | 2021-06-11 | 广州彩频通信科技有限公司 | Device and method for detecting terminal power in positioning system and field intensity meter |
-
2009
- 2009-09-03 CN CN200910195059A patent/CN101674640A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106646013A (en) * | 2016-09-19 | 2017-05-10 | 宇龙计算机通信科技(深圳)有限公司 | Radio frequency emission access fault detection apparatus and method and mobile terminal |
| CN108092688A (en) * | 2018-01-02 | 2018-05-29 | 广州吉欧电子科技有限公司 | A kind of high-power data transmission transmitting-receiving radio station |
| CN112954729A (en) * | 2021-04-08 | 2021-06-11 | 广州彩频通信科技有限公司 | Device and method for detecting terminal power in positioning system and field intensity meter |
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Application publication date: 20100317 |