CN102404057B - Method for increasing radiation performance of radio-frequency emission part of Global System for Mobile Communications (GSM) terminal - Google Patents
Method for increasing radiation performance of radio-frequency emission part of Global System for Mobile Communications (GSM) terminal Download PDFInfo
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- CN102404057B CN102404057B CN201110191725XA CN201110191725A CN102404057B CN 102404057 B CN102404057 B CN 102404057B CN 201110191725X A CN201110191725X A CN 201110191725XA CN 201110191725 A CN201110191725 A CN 201110191725A CN 102404057 B CN102404057 B CN 102404057B
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Abstract
The invention discloses a method for increasing radiation performance of a radio-frequency emission part of a Global System for Mobile Communications (GSM) terminal, which comprises the steps of: reading Random Amplified Microsatellite Polymorphism (RAMP) curve information stored in the GSM terminal, testing phase error of an emission symbol according to the stored RAMP curve, when the phase error of the emission symbol is greater than an agreement ruled threshold, modifying the rising edge of the stored RAMP curve; testing phase error of the emission symbol according to the modified RAMP curve; when the phase error of the emission symbol is less than or equal to the agreement ruled threshold, replacing the stored RAMP curve information with the modified RAMP curve information; otherwise,re-modifying the rising edge of the stored RAMP curve or the rising edge of the modified RAMP curve till the phase error of the emission symbol is less than or equal to the agreement ruled threshold.The method disclosed by the invention reduces cost while eliminating influence on emission quality of an emission time slot symbol by radiated interference.
Description
Technical field
The present invention relates to the mobile communication technology field, relate in particular to a kind of method of the GSM of raising terminal radio frequency radiating portion radiance.
Background technology
Global system for mobile communications (Global System for Mobile Communication, GSM) be a time division multiple access (TDMA, Time Division Multiple Access) system must be stuck within the agreement official hour template according to each burst (burst) in any time slot of agreement GSM.Described agreement official hour template is specifically referring to shown in Figure 1.
The radio-frequency performance of GSM terminal radiating portion is divided into conductive performance and radiance.The radio-frequency transmissions performance that influences circuit board itself that so-called conductive performance refers to remove antenna, and radiance just refers to comprise the radio-frequency transmissions performance of the terminal complete machine of antenna.Radiance has showed terminal use's actual impression, and is obviously even more important.The radiance of terminal radiating portion just might produce radiated interference to circuit board owing to will go out by aerial radiation, worsens the emission radio-frequency performance of circuit board itself, thereby worsens the radiance of the radio-frequency transmissions part of terminal.
In the radiated interference of terminal antenna radiation to the circuit board generation, having a class to disturb is the stabilization time that influences radio frequency sending set and power amplifier.Because GSM is a time-division system, so under the normal condition, the radio-frequency transmissions of GSM terminal part is only just opened when transmission time slot, closes when receiving slot.And all there is a stabilization time in radio-frequency devices itself, and just needing to stablize certain hour later on could operate as normal.So general GSM terminal all needs in advance certain hour to open when transmission time slot work, can operate as normal when guaranteeing really to launch data, this time quantum of opening is in advance just fixed after well in board design.
Under the normal condition, the GSM terminal is to control the power amplifier opening and closing of radio-frequency transmissions part by RAMP (climbing) curve, so that it is strict controlled in the time template shown in Figure 1.The transmitting power that described RAMP curve refers to the software control power amplifier when opening slowly from minimum to maximum and when closing slowly from being up to minimum.RAMP curve of the prior art as shown in Figure 2, the strict symmetry of rising edge and trailing edge wherein, abscissa represent the time, ordinate represents the control word of power amplifier, control word is more big, the transmitting power of power amplifier is just more big.State between rising edge and the trailing edge is the control word plateau.
But radiated interference can have influence on the stabilization time of radio frequency sending set and power amplifier, make strengthen stabilization time, in the time of then can causing transmission time slot really to be started working, the launch mass of the several symbols in front is very poor, the phase error that is the several symbols in front has exceeded within the scope of regulation, thereby has influence on whole radiance.In gsm protocol, symbol refers to the unit of each data in sequential transmission and order reception.
In order to address the above problem, all be to handle by drawing the board revision hardware mode again in the prior art, the shortcoming of this processing mode is that proving period is longer, if after being proved to be successful, then the circuit board of doing early stage all cancels, so cost is higher.
Summary of the invention
The problem that the present invention solves provides a kind of method of the GSM of raising terminal radio frequency radiating portion radiance, in the elimination radiated interference transmission time slot front in several symbol launch masses influences, is reduced cost.
In order to address the above problem, the invention provides a kind of method of the GSM of raising terminal radio frequency radiating portion radiance, comprise: the RAMP calibration curve information that reads the GSM terminal storage, test the phase error of emission symbol according to the RAMP curve of storage, when the phase error of described emission symbol during greater than the agreement defined threshold
Revise the rising edge of the RAMP curve of described storage, amended RAMP curve satisfies the time template of gsm system;
According to described amended RAMP curve, the phase error of test emission symbol;
When the phase error of emission symbol is less than or equal to the agreement defined threshold, amended RAMP calibration curve information is replaced the RAMP calibration curve information of described storage; Otherwise, remodify the rising edge of RAMP curve of described storage or the rising edge of described amended RAMP curve, be less than or equal to the agreement defined threshold until the phase error that makes the emission symbol.
Alternatively, the described RAMP calibration curve information that amended RAMP calibration curve information is replaced described storage comprises: described amended RAMP calibration curve information is replaced the RAMP calibration curve information of storing described in the described GSM terminal Nonvolatile memory.
Alternatively, the span of described agreement defined threshold comprises: 0 °～5 °.
Alternatively, the rising edge of the RAMP curve of the described storage of described modification comprises: improve the control word of a plurality of time sampling points before the plateau in the rising edge of RAMP curve of described storage, and the control word of the control word that makes described a plurality of time sampling points during greater than described plateau.
Alternatively, described a plurality of time sampling point comprises 3～5 time sampling points.
Alternatively, to put amended control word identical in described a plurality of time sampling.
Alternatively, amended control word difference is put in described a plurality of time sampling.
Alternatively, the phase error of described test emission symbol is to adopt phase error detecting apparatus to realize.
Alternatively, described GSM terminal comprises: mobile phone, notebook, POS machine or vehicle-mounted computer.
Compared with prior art, the present invention has the following advantages: for situation about strengthening the stabilization time of the radio-frequency transmissions utmost point that causes owing to radiated interference and power amplifier, under the prerequisite of not changing hardware, adjust the RAMP curve of storage, make the RAMP curve shift to an earlier date a period of time and reach maximum rapidly, make power amplifier shift to an earlier date high-power emission of a period of time, even power amplifier is stable in advance, thereby when real transmission time slot, the quality of the several symbols in front is normal, and other radio-frequency (RF) index are also normal, finally eliminated the deterioration of transmission time slot front several symbol launch masses that radiated interference causes.
Description of drawings
Fig. 1 is the schematic diagram of gsm system time template;
Fig. 2 is the schematic diagram of prior art RAMP curve;
Fig. 3 is the schematic flow sheet of the method for the raising GSM terminal radio frequency radiating portion radiance that provides of the embodiment of the invention;
Fig. 4 is the schematic diagram of the RAMP curve of embodiment of the invention storage;
Fig. 5 is the schematic diagram of the amended RAMP curve of the embodiment of the invention.
Embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, below in conjunction with accompanying drawing the specific embodiment of the present invention is described in detail.
Set forth a lot of details in the following description so that fully understand the present invention, implement but the present invention can also adopt other to be different from alternate manner described here, so the present invention has not been subjected to the restriction of following public specific embodiment.
Just as described in the background section, for the GSM terminal, radiated interference can have influence on the stabilization time of radio frequency sending set and power amplifier, make strengthen stabilization time, in the time of then can causing transmission time slot really to be started working, the launch mass of the several symbols in front is very poor, and namely the phase error of the several symbols in front has exceeded within the scope of regulation, thereby has influence on whole radiance.Though prior art can solve problem by drawing the board revision hardware mode again, the shortcoming of this processing mode is that proving period is longer, if after being proved to be successful, then the circuit board of doing early stage all cancels, so cost is higher.
At above-mentioned defective, the invention provides a kind of method of the GSM of raising terminal radio frequency radiating portion radiance, for situation about strengthening the stabilization time of the radio-frequency transmissions utmost point that causes owing to radiated interference and power amplifier, under the prerequisite of not changing hardware, adjust the RAMP curve of storage, make the RAMP curve shift to an earlier date a period of time and reach maximum rapidly, make power amplifier shift to an earlier date high-power emission of a period of time, even power amplifier is stable in advance, thereby when real transmission time slot, the quality of the several symbols in front is normal, and other radio-frequency (RF) index are also normal, has finally eliminated the deterioration of the several symbol launch masses in transmission time slot front that radiated interference causes.
Be elaborated below in conjunction with accompanying drawing.
Referring to shown in Figure 3, the method for the raising GSM terminal radio frequency radiating portion radiance that present embodiment provides comprises:
S1 reads the RAMP calibration curve information of GSM terminal storage, according to the phase error of the RAMP curve test emission symbol of storage;
S2 when the phase error of described emission symbol during greater than the agreement defined threshold, revises the rising edge of the RAMP curve of described storage, and amended RAMP curve satisfies the time template of gsm system;
S3, according to described amended RAMP curve, the phase error of test emission symbol;
S4 when the phase error of emission symbol is less than or equal to the agreement defined threshold, replaces amended RAMP calibration curve information the RAMP calibration curve information of described storage; Otherwise, remodify the rising edge of RAMP curve of described storage or the rising edge of described amended RAMP curve, be less than or equal to the agreement defined threshold until the phase error that makes the emission symbol.
Execution in step S1 at first, read the RAMP calibration curve information of GSM terminal storage, the RAMP calibration curve information of described storage comprises number information, temporal information and the control word information of time sampling point at least, and the RAMP calibration curve information of storing in the present embodiment specifically can be represented by RAMP curve shown in Figure 4.
Referring to shown in Figure 4, the rising edge of the RAMP curve of storing in the present embodiment and trailing edge respectively comprise 16 time sampling points, and the control word of 16 time sampling points of rising edge is respectively: 88,88,88,88,88,88,104,109,151,208,276,390,600,750,830 and 850; The control word of 16 time sampling points of trailing edge is respectively: 850,830,750,600,390,276,208,151,109,104,88,88,88,88,88 and 88.The rising edge of the RAMP curve of this storage and trailing edge are strict symmetrical, and satisfy the requirement of gsm system time template.The RAMP curve of storage shown in Figure 4 only is example, and the control word that the number of described time sampling point and each time sampling point are corresponding all can change, and should not limit protection scope of the present invention at this.
The RAMP calibration curve information is stored in the Nonvolatile memory of GSM terminal in the present embodiment, and the RAMP calibration curve information of the described GSM of reading terminal storage is exactly the RAMP calibration curve information that reads this GSM terminal correspondence from the Nonvolatile memory of described GSM terminal.Wherein, the RAMP calibration curve information of described storage refers to adopt the RAMP calibration curve information before the present embodiment method is revised, the concrete method of calculating the RAMP calibration curve information of storage has a variety of, the method of the RAMP parameter of the automatic calculating GSM power amplifier that provides for ZL200810033976.3 as the patent No. comprises: determine power amplifier wherein wavy curve and the sampling number at an edge; According to obtaining the sampled point that quantity is described sampling number in the described wavy curve, form normalized power point array; According to required actual power grade described normalized power point array is converted to actual power point array; Search the corresponding power control word of every bit in the described actual power point array according to a calibration of power table, to form the RAMP parameter of an edge power amplifier; Obtain the power amplifier RAMP parameter on another side edge according to the power amplifier RAMP parameter at a described wherein edge.Only for giving an example, it should not limit protection scope of the present invention to the method for above-mentioned calculating RAMP calibration curve information (being the RAMP parameter).Need to prove that the RAMP curve of storage must satisfy the time template of gsm system shown in Figure 1.
Read after the RAMP calibration curve information of GSM terminal storage, test the phase error of emission symbol according to the RAMP curve of storage.Wherein, the phase error of described test emission symbol is known for those skilled in the art, and present embodiment is to adopt phase error detecting apparatus to realize, for example, can adopt Agilent (Agilent) 8960 comprehensive detectors etc.In other embodiments of the invention, can also adopt other phase error detecting apparatus.
Follow execution in step S2, when the phase error of described emission symbol during greater than the agreement defined threshold, revise the rising edge of the RAMP curve of described storage, described GSM terminal makes power amplifier shift to an earlier date high-power emission according to amended RAMP curve, and the RAMP curve after the described adjustment satisfies the time template of gsm system.
Obtain launching the phase error of symbol among the step S1, when the phase error of described emission symbol during greater than 3GPP TS 05.05 agreement defined threshold, just thought the poor quality of emission symbol, thereby will have influence on the radiance of GSM terminal integral body.Particularly, the span of described agreement defined threshold comprises: 0 °～5 °, and as 0 °, 1 °, 2 °, 3 °, 4 °, 5 ° etc.
When the phase error of emission symbol during greater than 5 °, just need to revise the rising edge of the RAMP curve of described storage in the present embodiment, described GSM terminal makes power amplifier shift to an earlier date high-power emission according to amended RAMP curve.
Wherein, the rising edge of the RAMP curve of the described storage of described modification comprises: improve the control word of a plurality of time sampling points before the plateau in the rising edge of RAMP curve of described storage, and the control word of the control word that makes described a plurality of time sampling points during greater than described plateau.
Shown in Figure 5 is the amended RAMP curve of present embodiment.Rising edge and the trailing edge of revising back RAMP curve still respectively comprise 16 time sampling points, and the control word of 16 time sampling points of rising edge this moment is respectively: 88,88,88,88,88,88,104,109,151,208,276,390,901,901,901 and 850; The control word of 16 time sampling points of trailing edge is constant, still is respectively: 850,830,750,600,390,276,208,151,109,104,88,88,88,88,88 and 88.
By comparison diagram 5 and Fig. 4 as can be known, present embodiment has been revised three time sampling points of the RAMP curve rising edge of storage, and the control word that is about to 600,750,830 these three control word time corresponding sampled points is adjusted into 901,901,901 respectively.The control word of amended three control words during all than plateau is big by 61, and wherein the control word of plateau is 850.Need to prove that only for giving an example, it should in no way limit number and the control word of adjusting time sampling point at this.Amended control word is put in described a plurality of time sampling can be identical, also can be different.As: in another embodiment of the present invention, the control word of 600,750,830 these three control word time corresponding sampled points can also be adjusted into 900,901,900 respectively.In other embodiments of the invention, when comprising 18 time sampling points as rising edge, also can adjust the control word of three time sampling points, four time sampling points or five the time sampling points of control word before steadily, even the control word of the control word of described three time sampling points, four time sampling points or five time sampling points during above plateau.
Need to prove that amended RAMP curve shown in Figure 5 also must satisfy the time template of gsm system.This time template is also stipulated in 3GPP TS 05.05 agreement.The described time template that satisfies gsm system comprises: transmitting power of the time of the rising edge of burst and the time of trailing edge, plateau, time sampling point correspondence etc., namely amended RAMP curve is wanted the strict time template that satisfy gsm system shown in Figure 1.
Then execution in step S3 according to amended RAMP curve, tests the phase error of emission symbol.
According to amended RAMP curve, adopt phase error detecting apparatus to measure the phase error of emission symbol in the present embodiment, especially test the phase error that original phase error exceeds the symbol correspondence of agreement defined threshold.The method of the phase error of test emission symbol sees that above-mentioned steps S1 is described, does not repeat them here.
Last execution in step S4 when the phase error of emission symbol is less than or equal to the agreement defined threshold, replaces amended RAMP calibration curve information the RAMP calibration curve information of storage; Otherwise, remodify the rising edge of RAMP curve of described storage or the rising edge of amended RAMP curve, be less than or equal to the agreement defined threshold until the phase error that makes the emission symbol.
When the phase error of testing the emission symbol that obtains among the step S3 is less than or equal to the agreement defined threshold, as when being less than or equal to 5 °, show that amended RAMP curve eliminated the influence of radiated interference to the several symbol launch masses in transmission time slot front, therefore amended RAMP calibration curve information is replaced the RAMP calibration curve information of storage.Further, amended RAMP calibration curve information is replaced the RAMP calibration curve information of the described storage in the Nonvolatile memory that is stored in the GSM terminal, as: the RAMP calibration curve information of storage as described in as described in deleting in the Nonvolatile memory of GSM terminal is stored in amended RAMP calibration curve information in the Nonvolatile memory of described GSM terminal.
When the phase error of the emission symbol that obtains of test among the step S3 during greater than the agreement defined threshold, as greater than 5 ° the time, show that this moment, amended RAMP curve was not still eliminated radiated interference to the influence of the several symbol launch masses in transmission time slot front, therefore need return step S2, again the rising edge of the RAMP curve of storage be adjusted or the rising edge of amended RAMP curve is adjusted.After adjusting end again, continue execution in step S3, adopt the phase error of the RAMP curve test emission symbol after readjusting; Continue execution in step S4, judge whether the phase error of launching symbol this moment is less than or equal to the agreement defined threshold, when being less than or equal to, adjusting and finish; When greater than the time, then return step S2 again, until amended RAMP curve make the emission symbol phase error be less than or equal to the agreement defined threshold.Need to prove, in the process that the RAMP curve is made amendment, guarantee all the time that the RAMP curve satisfies the time template of gsm system.In the present embodiment, the phase error of the emission symbol that obtains according to the RAMP curve after the adjustment shown in Figure 5 has been less than or equal to 5 °, therefore the amended RAMP calibration curve information of Fig. 5 correspondence is replaced the RAMP calibration curve information of the storage of Fig. 4 correspondence in the Nonvolatile memory that is stored in the GSM terminal.
Need to prove that the described GSM terminal of present embodiment can should not limit protection scope of the present invention at this for mobile phone, notebook, POS machine or the vehicle-mounted computer etc. that use gsm system to communicate.
Present embodiment by adjusting the RAMP curve, has successfully been eliminated owing to the deterioration of radiated interference to the several symbol launch masses in transmission time slot front under the situation of not changing hardware.
Though the present invention discloses as above with preferred embodiment, the present invention is defined in this.Any those skilled in the art without departing from the spirit and scope of the present invention, all can do various changes and modification, so protection scope of the present invention should be as the criterion with claim institute restricted portion.
Claims (8)
1. method that improves GSM terminal radio frequency radiating portion radiance, comprise: read the RAMP calibration curve information of GSM terminal storage, the phase error according to symbol is launched in the RAMP curve test of storage is characterized in that, when the phase error of described emission symbol during greater than the agreement defined threshold
Revise the rising edge of the RAMP curve of described storage, amended RAMP curve satisfies the time template of gsm system; The rising edge of the RAMP curve of the described storage of described modification comprises: improve the control word of a plurality of time sampling points before the plateau in the rising edge of RAMP curve of described storage, and the control word of the control word that makes described a plurality of time sampling points during greater than described plateau;
According to described amended RAMP curve, the phase error of test emission symbol;
When the phase error of emission symbol is less than or equal to the agreement defined threshold, amended RAMP calibration curve information is replaced the RAMP calibration curve information of described storage; Otherwise, remodify the rising edge of RAMP curve of described storage or the rising edge of described amended RAMP curve, be less than or equal to the agreement defined threshold until the phase error that makes the emission symbol.
2. the method for raising as claimed in claim 1 GSM terminal radio frequency radiating portion radiance, it is characterized in that the described RAMP calibration curve information that amended RAMP calibration curve information is replaced described storage comprises: described amended RAMP calibration curve information is replaced the RAMP calibration curve information of storing described in the described GSM terminal Nonvolatile memory.
3. the method for raising GSM terminal radio frequency radiating portion radiance as claimed in claim 1 is characterized in that the span of described agreement defined threshold comprises: 0 °～5 °.
4. the method for raising GSM terminal radio frequency radiating portion radiance as claimed in claim 1 is characterized in that described a plurality of time sampling points comprise 3～5 time sampling points.
5. the method for raising GSM terminal radio frequency radiating portion radiance as claimed in claim 1 is characterized in that it is identical that amended control word is put in described a plurality of time samplings.
6. the method for raising GSM terminal radio frequency radiating portion radiance as claimed in claim 1 is characterized in that amended control word difference is put in described a plurality of time samplings.
7. the method for raising GSM terminal radio frequency radiating portion radiance as claimed in claim 1 is characterized in that the phase error of described test emission symbol is to adopt phase error detecting apparatus to realize.
8. the method for raising GSM terminal radio frequency radiating portion radiance as claimed in claim 1 is characterized in that described GSM terminal comprises: mobile phone, notebook, POS machine or vehicle-mounted computer.
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