CN101431353B - Control method and apparatus for delivering power amplifier - Google Patents
Control method and apparatus for delivering power amplifier Download PDFInfo
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- CN101431353B CN101431353B CN 200810176739 CN200810176739A CN101431353B CN 101431353 B CN101431353 B CN 101431353B CN 200810176739 CN200810176739 CN 200810176739 CN 200810176739 A CN200810176739 A CN 200810176739A CN 101431353 B CN101431353 B CN 101431353B
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Abstract
The invention discloses a control device for time slot distance incline which switches a first time slot and a second time slot, wherein the first time slot is provided with a first power value, and the second time slot which is adjacent to the first time slot is provided with a second power value. The control device comprises a power control device used for configuration of a distance incline zone or generating an output power curve, wherein the output power curve is a curve with a down concave shape; and a transient period estimator which is connected with the power control device in a coupling way, and used for estimating a transient period of the time slot distance incline when the output power curve can generate switch.
Description
The application be that July 6, application number in 2005 are 200510081904.2 the applying date, denomination of invention divides an application for the application for a patent for invention of " control method of delivering power amplifier and device ".
Technical field
The present invention relates to a kind of control method and device of delivering power amplifier, particularly relate to a kind of control method and device that is applied to the delivering power amplifier of wireless telecommunication system.
Background technology
Wireless telecommunication system is through atmosphere data to be sent to long-rangely, and strengthens the power of signal by delivering power amplifier (TX Power Amplifier, TX PA), with avoid signal before arriving at long-range destination, just decay to can't identification noise.Generally speaking, before transmitting effective signal, the power of TX PA need be promoted to the power level that will send, and the process of this bring to power is referred to as oblique ascension (Ramp Up); And after having transmitted effective signal, minimum level need fall back in the power of TX PA, and the process of this decline power is referred to as oblique deascension (Ramp Down).
(Time Division Multiple Access, TDMA) system is as the unit that transmits or receive data with a time slot (Slot) to existing time division multiple access.Any two mobile phones can not send data at same time slot (that is same time, same frequency range), otherwise can cause interference.Therefore, for fear of causing the mutual interference of mobile phone phase in the junction of two adjacent time slots, generally can each time slot at last or the period setting protection zone (Guard) and in the protection zone, do not transmit data.In addition, because tdma system can transmit the data of a plurality of time slots continuously, and the delivering power of each time slot may not be identical.Therefore, when tdma system continuously transmits the data of a plurality of time slots, need in twos continuously the protection zone between time slot carry out power transfer, between the process of this transfer power is called tiltedly (Inter-Ramp).
The power level no matter two continuous time slot S1 and S2 are transmitted increases, successively decreases or be constant, and the variable power process in existing tdma system oblique district between oblique ascension district, oblique deascension district reach all adopts linear continuous design to control curve as the power of delivering power amplifier.Please with reference to Figure 1A to 1C, it shows the power level sequential chart of delivering power amplifier when continuing to send two time slot data of existing tdma system.In Figure 1A, in the power level increase of two continuous time slot S1 and S2 transmission, an oblique control curve IRa is the straight line of linear increment, and its power level is between the delivering power of two continuous time slots.In Figure 1B, in the power level reduction of two continuous time slot S1 and S2 transmission, an oblique control curve I Rb is the straight line of linear decrease, and its power level is between the delivering power of two continuous time slots.In Fig. 1 C, constant in the power level of two continuous time slot S1 and S2 transmission, an oblique control curve IRc is a horizontal linear.As for oblique ascension control curve RUa, RUb and RUc all is linear increment, and oblique deascension control curve RDa, RDb and RDc all are linear decreases.
Existing tdma system uses oblique ascension control curve and the oblique deascension control curve of jumbo memory to store various power levels, and adopt the mode of linear operation produce TX PA between oblique control curve.For oblique ascension district and oblique deascension district, be in memory, to deposit each corresponding oblique ascension control curve and oblique deascension control curve in to each power level.The advantage of this practice is not need computing and can produces the control curve fast, and shortcoming is to need the jumbo memory of waste to store each corresponding oblique ascension control curve and oblique deascension control curve.For oblique district, based on the power level of two continuous time slots multiple permutation and combination is arranged, can't more substantial tiltedly the control curve deposit memory in, consider the complexity in the computing simultaneously, thus the simple linear operation mode of employing produce between the oblique curve of controlling.
Yet the electrical power that general TX PA is consumed is occupied great ratio for the power consumption of whole system, and the power that especially transmits is bigger, power consumption is also just big.Yet the design that the simple linearity that existing tdma system is adopted links to each other even do not transmit under the data conditions in system, still must consume considerable electric weight.
Summary of the invention
In view of this; The purpose of this invention is to provide oblique control device between the time slot between a kind of switching first time slot and second time slot; The intensity that not only can be reduced in the protection zone delivering power is to save energy; Can also make it meet the standard on time domain and the frequency spectrum to produce the power control curve of TX PA less operation time apace.
One embodiment of the invention provide oblique control device between the time slot between a kind of switching first time slot and second time slot; Wherein this first time slot has one first performance number; And this second time slot that is adjacent to this first time slot has one second performance number; This control device comprises: an output control device, and be used to one and tiltedly distinguish configuration or produce an output power curve, wherein this output power curve is the curve with concave shape; And an estimator during the transition, be coupled to this output control device, in order to estimate during a transition oblique between this time slot that switches of this output power curve; Wherein this output control device comprises memory and curve generator; This memory is in order to provide at least one reference power curve; This curve generator is coupled to this memory; In order to according to this at least one reference power curved configuration or produce this output power curve; Wherein at least one reference power curve of this in this memory comprises the first reference power curve and the second reference power curve, and this curve generator produces a first of this output power curve from this first reference power curve and this first performance number, and produces a second portion of this output power curve from this second reference power curve and this second performance number.
Another embodiment of the present invention provides oblique control method between the time slot between a kind of switching first time slot and second time slot; Wherein this first time slot has one first performance number; And this second time slot that is adjacent to this first time slot has one second performance number, and this method comprises: at least one reference power curve is provided; According to this at least one reference power curved configuration or produce an output power curve of tiltedly distinguishing, wherein this output power curve is the curve with concave shape; And estimate during a transition oblique between this time slot that switches of this output power curve; Wherein this at least one reference power curve comprises the first reference power curve and the second reference power curve; Produce a first of this output power curve from this first reference power curve and this first performance number, and produce a second portion of this output power curve from this second reference power curve and this second performance number.
For making above-mentioned purpose of the present invention, characteristic and the advantage can be more obviously understandable, hereinafter is special lifts a preferred embodiment, and combines the accompanying drawing formula to specify as follows.
Description of drawings
Figure 1A to 1C (prior art) shows the power level sequential chart of delivering power amplifier when continuing to send two time slot data of existing tdma system.
Fig. 2 shows according to the power level sequential chart of the delivering power amplifier of the present invention's one preferred embodiment (TX Power Amplifier, TX PA) when continuing to send two time slot data.
Fig. 3 shows the control method flow chart according to the delivering power amplifier of the present invention's one preferred embodiment.
Fig. 4 A shows the sketch map according to original skew curve of the present invention's one preferred embodiment.
Fig. 4 B shows according to the sketch map of tiltedly controlling curve between the present invention's one preferred embodiment.
Fig. 5 A shows the sketch map according to the original oblique ascension curve of the present invention's one preferred embodiment.
Fig. 5 B shows the sketch map according to the oblique ascension control curve of the present invention's one preferred embodiment.
Fig. 6 A shows the sketch map according to the original oblique deascension curve of the present invention's one preferred embodiment.
Fig. 6 B shows the sketch map according to the oblique deascension control curve of the present invention's one preferred embodiment.
Fig. 7 shows the calcspar according to the memory of the present invention's one preferred embodiment.
Fig. 8 shows the sketch map according to the wireless telecommunication system of groove for a long time of the present invention's one preferred embodiment.
Fig. 9 (existing skill) (for example: the EDGE) sketch map of wireless telecommunication system shows an existing hybrid modulation.
Figure 10 (existing skill) shows the sketch map of existing hybrid modulation wireless telecommunication system in an output power curve of adjacent 8PSK and GMSK modulation time slot.
Figure 11 A-11B (prior art) show the high power transient current for existing hybrid modulation wireless telecommunication system in a tiltedly influence of the power output in district.
Figure 12 shows according to the high power transient current of the present invention's one preferred embodiment for the hybrid modulation wireless telecommunication system in a tiltedly influence of the power output in district.
Figure 13 A-13B shows respectively according to the power output of the present invention's one preferred embodiment-output frequency function and the power output-function of time under specific output frequency.
Figure 14 shows the calcspar of using mobile unit of the present invention.
Description of drawings
D1: first data field
D2: second data field
S1: first time slot
S2: second time slot
RU, RUa, RUb, RUc: oblique ascension control curve
RD, RDa, RDb, RDc: oblique deascension control curve
IR, IR ', IRa, IRb, IRc: an oblique control curve
P1, P2: protection zone
FL: original left section
FR: original right section
FL ': left side control section
FR ': right control section
FL0: original oblique left section
FR0: original oblique right section
FL0 ': tiltedly control section between a left side
FR0 ': tiltedly control section between the right side
FL1: original oblique ascension left side section
FR1: the right section of original oblique ascension
FL1 ': left oblique ascension control section
FR1 ': right oblique ascension control section
FL2: original oblique deascension left side section
FR2: the right section of original oblique deascension
FL2 ': left oblique deascension control section
FR2 ': right oblique deascension control section
81: the base station
83: mobile unit
85: radio frequency control module
87: estimator between transient period
700: wireless communication apparatus
710: delivering power amplifier
720: memory
The 721:FL table of comparisons
The 722:FR table of comparisons
The 723:SL table of comparisons
The 724:SR table of comparisons
725: the lowest power value table of comparisons
800: output control device
831: power amplifier
833: feeding mechanism
837: curve generator
839: controller
Embodiment
The present invention is applied to a delivering power amplifier; Delivering power amplifier is used for controlling the power of the signal that a tendency to develop send; The present invention is characterized in the variable power district, to produce non-linear power control curve,, use the consumption that reduces power to control the variable power of this signal.The variable power district have at least one delivering power value K and can be divided into oblique ascension district, oblique deascension district and between oblique district.The generation of power control curve of the present invention, main earlier according to delivering power value K, produce primitive curve and decision lowest power value H.Primitive curve is divided into primitive curve left side section FL and the right section FR of a primitive curve by level.According to delivering power value K and lowest power value H, determine left section ratio value SL and right section ratio value SR again.Then; Calculate a control curve left side section FL ' according to lowest power value H, primitive curve left side section FL and left section ratio value SL; And, calculate the right section FR ' of a control curve according to this lowest power value H, the right section FR of primitive curve and right section ratio value SR.According to control curve left side section FL ' and the right section FR ' of control curve, produce power control curve, at last to control the variable power of this signal.
Power control curve can be divided into oblique ascension control curve, oblique deascension control curve and between oblique control curve.Corresponding to the power in oblique ascension district control curve is oblique ascension district control curve, is oblique deascension district control curve corresponding to the power control curve in oblique deascension district, and oblique district's control curve between corresponding to the oblique power control curve in district being.In Fig. 5 A, the left end point of original oblique ascension left side section FL1 is the minimum point of original oblique ascension curve, and the right endpoint of the right section FR1 of original oblique ascension is the peak of original oblique ascension curve.Simultaneously, original oblique ascension left side section FL1 and the right section FR1 of original oblique ascension join continuously.In Fig. 6 A, the left end point of original oblique deascension left side section FL2 is the peak of original oblique deascension curve, and the right endpoint of the right section FR2 of original oblique deascension is the minimum point of this original oblique deascension curve.Simultaneously, original oblique deascension left side section FL2 and the right section FR2 of original oblique deascension join continuously.In Fig. 4 A; Original oblique left section FL0 comprises a left end point and a right endpoint; Be respectively peak and the minimum point of original oblique left section FL0; And original oblique right section FR0 comprises a left end point and a right endpoint, is respectively minimum point and the peak of original oblique right section FR0.
Main spirit of the present invention is to utilize the protection zone need not transmit the characteristic of data, with in twos continuously the control curve of the protection zone between time slot (that is tiltedly district) be designed to notching curve, reach the power saving purpose with the intensity that is reduced in the protection zone delivering power.The width of notching curve can be set according to user's needs, and preferably less than 1/4th during the time slot.
In addition, it should be noted that equally notching curve produces according to original power curve (primitive curve).The original power curve can be a polynomial function or a cosine function that is stored in advance in the memory.Memory can have comparison list, is used for storing and/or writing down the control data all about the original power curve.In an embodiment, the original power curve can be expressed as [1+COS (2 π * n/N)]/2, and wherein n and N are used for producing the control data of original function curve.Yet the present invention is not limited to this, and any other notching curve, linearity or nonlinear curve also can be used as original function curve of the present invention.
Although the power of front and back time slot has multiple permutation and combination, and the situation of the plural time slot data of any continuous transmission all can use the present invention, and following embodiment only details system continues to send two time slot data under fixed frequency range situation.
Please, show the power level sequential chart of delivering power amplifier (TX Power Amplifier, TX PA) when continuing to send two time slot data according to the present invention's one preferred embodiment with reference to Fig. 2.As shown in Figure 2, the first adjacent time slot S1 and the second time slot S2 set the last period and are respectively the first protection zone P1 and the second protection zone P2.System only transmits data at the first data field D1 and the second data field D2, and does not transmit data at the first protection zone P1 and the second protection zone P2.The oblique ascension control curve RU in oblique ascension district explained that before the effective signal that transmits the first data field D1 power of TX PA needs to be promoted to the first transmitted power strength K1 from 0.The oblique deascension control curve RD in oblique deascension district explains that after the effective signal that has transmitted the second data field D2 power of TX PA needs to fall back minimum level 0 from the second transmitted power strength K2.As for tiltedly controlling curve IR between an oblique district, explain that the protection zone P1 between the first time slot S1 and the second time slot S2, two continuous time slots need carry out power transfer.Between tiltedly control curve IR with non-linear ways of connecting the power of TX PA is converted to the second transmitted power strength K2 from the first transmitted power strength K1, to form notching curve, be reduced in the intensity of protection zone P1 delivering power according to this.
In Fig. 2, by have concave shape between oblique control curve IR and linear increment original oblique regional A of being surrounded of control curve IR ', be present embodiment between tiltedly control curve IR compared to existing the oblique power consumption saved of control curve IR '.In addition, no matter the first transmitted power strength K1 greater than, be equal to or less than the second transmitted power strength K2, the design of notching curve that the present invention adopts, the characteristic that all can effectively utilize the protection zone need not transmit data is saved energy.
In an embodiment, the one first performance number SL that comprises the following steps: to be provided at the very first time point of first time slot at the output power control method of the device of groove wireless telecommunication system for a long time of the present invention; Be provided at one second performance number SR of second time point of second time slot that is adjacent to first time slot; At least one original power curve of foundation between between the very first time point and second time point produces an output power curve, and wherein at least one output power value Q of output power curve is in fact less than the first performance number SL and the second performance number SR; And according to output power curve adjustment power output.
In addition, the original power curve comprises one first power curve FL (t) and one second power curve FR (t), and this output power curve comprise a FL ' of first (t) and a second portion FR ' (t).Output power curve produces according to following equation: FL ' (t)=H+FL (t) * SL ', and FR ' (t)=H+FR (t) * SR ', wherein, SL '=SL-H, SR '=SR-H, and H is a default value.H can be the lowest power value of output power curve, maybe can equal performance number Q.Preferably, performance number Q is approximately 0 or (for example: the smaller of first performance number and second performance number) 6dBm be lower than first performance number and second performance number at least.SL ' can be 2X, and SR ' can be 2Y, and X and Y are integer.
Moreover the groove wireless telecommunication system can be the TDMA communication system for a long time, for example: GSM, GPRS and/or EDGE system.The present invention's device of groove wireless telecommunication system for a long time can be the delivering power amplifier of mobile phone.
Please, show control method flow chart according to the delivering power amplifier of the present invention's one preferred embodiment with reference to Fig. 3.At first; When delivering power amplifier transmits data at the first continuous time slot and second time slot; And first time slot and second time slot have the first delivering power value K1 and the second delivering power value K2 respectively, and the control method of delivering power amplifier provides a primitive curve in step 302.Primitive curve is divided into original left section FL and original right section FR to the time shaft level.Then, in the lowest power value H of step 304 decision power control curve.In step 306,, calculate left power proportions value SL and the right power proportions value SR of power control curve with respect to primitive curve according to the first delivering power value K1, the second delivering power value K2 and lowest power value H.Step 308 is scaled original left section FL SL*FL and original right section FR is scaled SR*FR according to right power proportions value SR according to left power proportions value SL respectively.Then, calculate left side control section FL '=H+SL*FL and right control section the FR '=H+SR*FR of power control curve in step 310, and produce power control curve in step 312.
According to above-mentioned steps, can produce one by one power control curve between tiltedly district's control curve, oblique ascension district control curve and oblique deascension district control curve.Especially; The control method of the delivering power amplifier of preferred embodiment of the present invention; Generation have concave shape between oblique control curve, in order to oblique district's power level between the control delivering power amplifier, between making tiltedly district's power level be converted to the second delivering power value K2 from the first delivering power value K1; Also produce oblique ascension control curve, the oblique ascension district power level in order to the control delivering power amplifier makes oblique ascension district power level be promoted to the first delivering power value K1 from lowest power value H; And produce oblique deascension control curve, in order to control the oblique deascension district power level of this delivering power amplifier, oblique deascension district power level is fallen from the second delivering power value K2 be back to lowest power value H.
Please with reference to Fig. 4 A and 4B, show according to original skew curve of the present invention's one preferred embodiment and between the oblique sketch map of control curve.Tiltedly distinguish the control curve between power control curve and have concave shape.Tiltedly the method for control curve is following between generation: at first, original skew curve is provided, level is divided into original oblique left section FL0 and original oblique right section FR0.Shown in Fig. 4 A, the curved profile of original oblique left section FL0 and original oblique right section FR0 may not need symmetry, only need meet the regulating scope on time domain and the frequency spectrum, and the unlikely data that cause adjacent two channels are disturbed and got final product.Original oblique left section FL0 is decremented to 0 power from the unit power value is non-linear, and original oblique right section FR0 is from 0 power non-linear increasing to unit power value.Then, the lowest power value H of decision power control curve.According to the first delivering power value K1, the second delivering power value K2 and lowest power value H, between calculating tiltedly the control curve with respect to oblique oblique power proportions value SR0=K2-H between power proportions value SL0=K1-H and the right side between the left side of original skew curve.Respectively original oblique left section FL1 is scaled SL0*FL0 and original oblique right section FR0 is scaled SR0*FR0 according to oblique power proportions value SR0 between the right side according to oblique power proportions value SL0 between a left side again.Then, calculate oblique control section FL0 '=(SL0/2 between a left side
N) * (FL0*2
N) and the right side between oblique control section FR0 '=H+ (SR0/2
N) * (FR0*2
N).At last, shown in Fig. 4 B, can produce have concave shape between oblique control curve, and by the control input of voltage, electric current or power with effective control delivering power amplifier in the oblique power level in district.Oblique control curve between control method produced according to the delivering power amplifier of preferred embodiment of the present invention; Discontinuous problem is gone up in the oblique power control of controlling curve and a previous time slot or a back time slot between not having, and does not also have the power control of tiltedly controlling oblique control section between the section and the right side between a left side and goes up discontinuous problem.
In various embodiments, last and back one time slot can comprise different modulation type (for example: first time slot comprises one first modulation type and second time slot comprises that is different from second modulation type of first modulation type).When the power output between first and second time slot (for example in the protection zone) is lower than a critical value, cut to the generation that fails to be convened for lack of a quorum of the transient electrical of second modulation type from first modulation type.For example, first time slot can use GMSK modulation and second time slot can use the 8PSK modulation, and critical value can be in H and two time slots lower output power value.In one embodiment, key value is approximately H+ (p* Δ), and Δ is the poor of output power value lower in H and two time slots, and p is one and is about 0.25 to 0.5 value.
Please, show according to the original oblique ascension curve of the present invention's one preferred embodiment and the sketch map of oblique ascension control curve with reference to Fig. 5 A and 5B.The method that produces oblique ascension control curve is following: at first, original oblique ascension curve is provided, level is divided into original oblique ascension left side section FL1 and the right section FR1 of original oblique ascension.Shown in Fig. 5 A, the curved profile of original oblique ascension left side section FL1 and the right section FR1 of original oblique ascension may not need symmetry, only need meet the regulating scope on time domain and the frequency spectrum, and the unlikely data that cause adjacent two channels are disturbed and got final product.Original oblique ascension left side section FL1 is from 0 power non-linear increasing, and the right section FR1 of original oblique ascension non-linear increasing is to the unit power value, and original oblique ascension left side section FL1 joins with original oblique ascension right side section FR1 continuously.Then, according to the first delivering power value K1 and lowest power value H, calculate left oblique ascension power proportions value SL1 and the right oblique ascension power proportions value SR1 of oblique ascension control curve with respect to original oblique ascension curve.In this oblique ascension district, left oblique ascension power proportions value SL1 and right oblique ascension power proportions value SR1 equate, that is SL1=SR1=K1-H.Respectively original oblique ascension left side section FL1 is scaled SL1*FL1 and the right section FR1 of original oblique ascension is scaled SR1*FR1 according to left oblique ascension power proportions value SL1 again.Then, calculate left oblique ascension control section FL1 '=H+ (SL1/2
N) * (FL1*2
N) and right oblique ascension control section FR1 '=H+ (SR1/2
N) * (FR1*2
N).At last, shown in Fig. 5 B, can produce nonlinear oblique ascension control curve, and import with effective control delivering power amplifier in the power level in oblique ascension district by the control of voltage, electric current or power.The oblique ascension that control method the produced control curve of accordinging to the delivering power amplifier of preferred embodiment of the present invention; Discontinuous problem is gone up in the power control that does not have an oblique ascension control curve and a back time slot, and discontinuous problem is gone up in the power control that does not also have left oblique ascension control section and right oblique ascension control section.
Please, show according to the original oblique deascension curve of the present invention's one preferred embodiment and the sketch map of oblique deascension control curve with reference to Fig. 6 A and 6B.The method that produces oblique deascension control curve is following: at first, original oblique deascension curve is provided, level is divided into original oblique deascension left side section FL2 and the right section FR2 of original oblique deascension.Shown in Fig. 6 A, the curved profile of original oblique deascension left side section FL2 and the right section FR2 of original oblique deascension may not need symmetry, only need meet the regulating scope on time domain and the frequency spectrum, and the unlikely data that cause adjacent two channels are disturbed and got final product.Original oblique deascension left side section FL successively decreases from unit power value is non-linear, and the right section FR of original oblique deascension is non-linear to be decremented to 0 power, and original oblique deascension left side section FL and original oblique deascension right side section FR join continuously.Then, according to the second delivering power value K2 and lowest power value H, calculate left oblique deascension power proportions value SL2 and right oblique deascension power proportions value SR2.In this oblique deascension district, left oblique deascension power proportions value SL2 and right oblique deascension power proportions value SR2 equate, that is SR2SL2=SR2=K2-H.Respectively original oblique deascension left side section FL2 is scaled SL2*FL2 and the right section FR2 of original oblique deascension is scaled SR2*FR2 according to right oblique deascension power proportions value SR2 according to left oblique deascension power proportions value SL2 again.Then, calculate left oblique deascension control section FL2 '=H+ (SL2/2
N) * (FL2*2
N) and right oblique deascension control section FR2 '=H+ (SR2/2
N) * (FR2*2
N).At last, shown in Fig. 6 B, can produce nonlinear oblique deascension control curve, and import with effective control delivering power amplifier in a power level of tiltedly distinguishing by the control of voltage, electric current or power.The oblique deascension that control method the produced control curve of accordinging to the delivering power amplifier of preferred embodiment of the present invention; Discontinuous problem is gone up in the power control that does not have oblique deascension control curve and previous time slot, and discontinuous problem is gone up in the power control that does not also have left oblique deascension control section and right oblique deascension control section.
Please, show calcspar according to the memory of the present invention's one preferred embodiment with reference to Fig. 7.Memory 720 comprises the primitive curve left side section table of comparisons 721, the primitive curve right side section table of comparisons 722, the left section ratio value table of comparisons 723, the right section ratio value table of comparisons 724 and the lowest power value table of comparisons 725.The primitive curve left side section table of comparisons 721 is used for storing several primitive curve left side sections, and each primitive curve left side section is corresponding to a delivering power value.The right section table of comparisons 722 of primitive curve is used for storing the right section of several primitive curves, and the right section of each primitive curve is corresponding to a delivering power value.The lowest power value table of comparisons 725 is used for storing several lowest power values, and each lowest power value is corresponding to a delivering power value.The left side section ratio value table of comparisons 723 is used for storing several left section ratio values, and each left section ratio value is corresponding to a delivering power value and a lowest power value.The right section ratio value table of comparisons 724 is used for storing several right section ratio values, and wherein each right section ratio value is corresponding to a delivering power value and a lowest power value.
The practice on the relevant actual operation; Respectively with each calculating parameter; Lowest power value H, left power proportions value SL, right power proportions value SR, original left section FL and original right section FR; Respective value under different capacity is created as array and stores form, and the FL table of comparisons 721, the FR table of comparisons 722, the SL table of comparisons 732, the SR table of comparisons 724 and the H table of comparisons 725 are stored in the memory 720.When using different power output intensity, system can find pairing set point fast by the mode of tabling look-up.On memory uses, need to deposit various power level control curves in the memory the practice compared to existing tdma system, the present invention adopts the memory use amount that the mode of primitive curve proportional zoom is required obviously to reduce.On arithmetic speed; The multiplication of the simulation floating number (float point) that need adopt for fear of original left section FL and original right section FR expends the dozens of operational order by integer type (fixed point) embedded system, and content record original left section FL and the original right section FR that stores relevant original left section FL and original right section FR on the form multiply by value (that is the FL_TABLE=FL*2 after 2 the Nth power respectively
NAnd FR_TABLE=FR*2
N).When calculating left side control section FL ' and right control section FR ', can be merely handle (that is FL '=H+SL* (FL_TABLE) move to right N bit) and FR '=H+SR* (FR_TABLE) the N bit that moves to right with displacement mode), to save operand.By this, can adopt the binary shift mode to reach the purpose of floating number multiplication in the computing, calculate and overcome the numerous and diverse multiplication of floating number.Need to control the practice that the curve every bit is done linear operation compared to existing tdma system, the present invention makes the integer multiply calculation of displacement with whole primitive curve more can calculate the control curve fast.In addition, system also can be aided with integrated circuit and make the computing that auxiliary processor (co-processor) carries out the integer multiply displacement, more can save the operand and the operation time of control curve.
The control method of the delivering power amplifier that the above embodiment of the present invention disclosed, may command TX PA does non-linear connection when transfer power intensity, to reach the power saving purpose; The special art of computation is also further proposed; Not only can be with less memory use amount and operation time; Simple and easy and produce the power control curve of TX PA apace, also can make the control curve in variable power district possess given configuration, make it meet the standard on time domain and the frequency spectrum.
Please, show sketch map according to the wireless telecommunication system of groove for a long time of the present invention's one preferred embodiment with reference to Fig. 8.The groove wireless telecommunication system comprises a base station 81 and a mobile unit 83 for a long time.Mobile unit 83 carries out communication with several time slots and base station 81.Mobile unit 83 comprises a delivering power amplifier 831, an output control device 800 and a controller 839.Delivering power amplifier 831 is in order to amplify an output signal, for example an OUT signal.Output control device 800 comprises a feeding mechanism 833, a memory 835, a curve generator 837 and a controller 839.The first performance number SL that feeding mechanism 833 was put in order to the very first time that is provided at first time slot reaches the second performance number SR at second time point of second time slot, and second time slot is adjacent to first time slot.Memory 835 (memory 720 as shown in Figure 7) is in order to store and/or to provide at least one original power curve.Curve generator 837 is coupled to feeding mechanism 833 and memory 833; Produce an output power curve in order to the original power curve of foundation between between the very first time point and second time point, and at least one output power value Q of output power curve is in fact less than the first performance number SL and the second performance number SR.Controller 839 is coupled to curve generator 837 and delivering power amplifier 831, in order to the power output according to output power curve adjustment delivering power amplifier 831.
In order under the situation of corrupt data not, to improve data transmission rate, the EDGE wireless telecommunication system provides a kind of ability of user to be suitable for the selection scheme of different modulating type (for example: 8PSK modulation type or GMSK modulation type).Basically, if channel quality is good, for example: can meet or surpass certain threshold or channel quality standard, then the EDGE system can adopt 8PSK to come modulating data, (for example: can transmit more multidata each time slot) makes the per unit time.Yet if channel quality is good inadequately and can't adopt 8PSK to come modulating data, the EDGE system can select GMSK modulation type scheme to carry out transfer of data, so that data are difficult for is impaired.
Therefore, two adjacent time slots can be modulated by different modulation schemes.As shown in Figure 9, time slot 1 is modulated by the 8PSK scheme, and time slot 2 is modulated by the GMSK scheme.The performance number of time slot 1 is A and the performance number of time slot 2 is B.Traditionally, do not transmit any data, yet its performance number can increase to B with as the preparation in time slot 2 transmission from A in oblique district 900.
Figure 10 shows the sketch map of existing hybrid modulation wireless telecommunication system in an output power curve of adjacent 8PSK and GMSK modulation time slot.Dotted line 1012-1014 (using the 8PSK modulation), dotted line 1022 (using the GMSK modulation) in oblique district 900 at time slot 1, and dotted line 1032-1034 (using the GMSK modulation) at time slot 2 constituted the timing protection of hybrid modulation wireless telecommunication system, and its parameter is defined by the GSM/GPRS/EDGE specification.According to the defined timing protection of GSM/GPRS/EDGE specification, each output power value will or (for example: line segment 1012,1014,1022,1032 and 1034) exceed a preset minimal power values less than a preset maximum power value.In other words, output power value (being drawn by solid line 1042,1044 and 1046) can not surpass timing protection (being drawn by dotted line 1012,1014,1022,1032 and 1034).
Please, (for example: the EDGE) sketch map of wireless telecommunication system show existing hybrid modulation with reference to Fig. 9.Existing in order between being controlled at tiltedly the performance number in district 900 with the mode of linear pointwise performance number is increased to B.As shown in Figure 9, existing is directly to connect performance number A and performance number B to form a linear power line segment in an oblique district 900.Yet, adopt the existing method shown in Figure 11 A-11B, will in an oblique district 900, produce transient current.
Figure 11 A-11B illustrate the high power transient current for existing hybrid modulation wireless telecommunication system in a tiltedly influence of the power output in district, be presented at different frequency under respectively and transient current 1100 that different time descends to be taken place.Shown in Figure 11 A, in an oblique district 900, transition indication 1100a-b surpasses timing protection 1110a-b (dotted line).If transition indication 1100a-b surpasses timing protection 1110a-b, maybe (for example: the adjacent channel that mobile phone) uses will noisy situation take place by other device for mobile communication.In addition, shown in Figure 11 B, it is that the transient current peak 1100 of 0.4MHz produces from transmitting channel that a frequency is arranged in oblique district 900.Figure 11 B shows the power of representing with frequency function.Therefore can determine to take place the part of high transient current 1100 at an oblique line (for example in an oblique district 900).Shown in Figure 11 B, the performance number on transient current peak has exceeded general tolerance limit degree greater than 20dBm.
In order to solve the issuable problem of above-mentioned transient current, the present invention provides a kind of method and device that forms notching curve in an oblique district, (for example: the maximum that timing/power protects) surpasses a preset maximum value so that an immediate current power of tiltedly distinguishing is neither.For instance, in one embodiment, the present invention relevant for reduce in the communications protocol between the oblique method of the immediate current in district, comprise the following steps:
Based on the decision of recessed power curve at the oblique output power value in district (for example :) to all time points, make oblique some performance number in district be lower than be next between tiltedly first time slot before the district and/or be next between the performance number of signal of second time slot after tiltedly distinguishing.Power curve is not the straight line like skew curve between Fig. 9 existing, though also possibly comprise one or more parts that are essentially linear segments.
2. configuration or produce notching curve makes minimum point (for example: the lowest power value) occur in transient electrical in fact and fail to be convened for lack of a quorum and part takes place and be lower than a critical value (a for example preset performance number).In general, the central authorities that tiltedly distinguish between the minimum point of notching curve occurs in.
3. use at least one primitive curve to produce notching curve.In one embodiment, notching curve comprises primitive curve FL (t) and FR (t).
Figure 12 shows according to the high power transient current of the present invention's one preferred embodiment for the hybrid modulation wireless telecommunication system in a tiltedly influence of the power output in district, shows the output power curve figure that representes with the function of time.Between being next to tiltedly before the district 900, output power curve 1240 has at time slot 1 and one is about-first performance number (using the 8PSK modulation) of 6dBm.Between being next to tiltedly after the district 900, output power curve 1240 time slot 2 have one be about 0dBm second performance number (using the GMSK modulation).Yet in oblique district 900, it is recessed that output power curve 1240 is usually, and have first (or left side) and increase section 1222, second (or right) and increase section 1224 and be about-minimal power values of 30dBm.At some specific embodiment; Between power curve 1240 tiltedly the critical value of the minimum point 1223 in district 900 can be set at-6dBm ,-10dBm or-20dBm, or even more be lower than be next between oblique both juniors of first and second performance number before or after the district 1220.Suppose that critical value is shown in figure 12-20dBm, minimum point (minimal power values 1225) is apparently less than this critical value.
Figure 13 A-13B shows respectively according to the power output of the present invention's one preferred embodiment-output frequency function and the power output-function of time under specific output frequency, and then shows the result by the present invention produced.It is first output power curve of function that Figure 13 A shows with the frequency, and (setting transient current here and be δ=0.4MHz) is second output power curve of function with time and Figure 13 B is presented under the given frequency.On first output power curve, the performance number of transient current 1360a-b respectively the position+/-0.4MHz and being lower than apparently by protection 1110a-b defined performance number.Therefore, shown in Figure 13 A-13B, have a lower peak (its performance number is lower than 20dBm) at the oblique output power curve in district 900, this is compared to the peak of the existing system shown in Figure 11 B (its performance number is higher than 20dBm).By this, can reduce or avoid any interference to occur in the transient current of the higher-wattage that adjacent channel causes.
Figure 14 shows the calcspar of using mobile unit of the present invention.Shown in figure 14, except above-mentioned output control device 800, controller 839, and power amplifier 831, mobile unit 83 also has estimator 87 during a wireless control module 85 and the transition.Estimator 87 or controller 839 can be all or separately be implemented on a microprocessor or in one or more devices of a physical layer (for example: integrated circuit) between wireless control module 85, output control device 800, transient period.It should be noted that; Controller 839 can (1) according to the power output of output power curve adjustment power amplifier, the switching that also can (2) be controlled at the performance number/modulation type between adjacent time slot is (for example: second modulation type that switches to second time slot from first modulation type of first time slot).In order to control the switching of modulation type, controller 839 can also comprise general objects output (GPO) device or three-way command unit.
At the TDMA communication system, wireless control module 85 81 receives signals and exports a controlling signal (for example: at the CONTROL of Figure 14) to output control device 800 from the base station.Controlling signal is included in some or all characteristic of each time slot of subsequent data frame.Characteristic can be included in the performance number, each time slot (therefrom can point out, determine or be provided with between adjacent time slot between oblique district) of each time slot of Frame the position, with and/or the modulation type of each time slot of Frame.
For instance, controlling signal notice power device 800 originally the time slot 1 power demand value of Figure 12 should be A (be about-6dBm) and time slot 2 power demand values should be B (being about 0dBm).So 900 output power curve is tiltedly distinguished in output control device 800 configurations or generation between between time slot 1 and time slot 2.And at least one output power value of output power curve is in fact less than performance number A and B.After output power curve produced, estimator 87 was also estimated and/or determine in the output power curve that central all power outputs are less than a preset critical between the transient period of (and tiltedly distinguish 900) between transient period.At some specific embodiment, be included between transient period output power curve during minimum point took place or the time.Therefore, between the transient period of output power curve, controller 839 switches to performance number B (and/or can switch to second modulation type from first modulation type) with the control output power value of power amplifier 831 and from performance number A.
Therefore, except the performance number conversion between the control time slot, at the EDGE communication system, mobile unit 83 also can be used to control the modulation type conversion between time slot.For example, can to notify output control device 800 be that 8PSK and time slot 2 required modulation types are GMSK at the time slot 1 required modulation type of Figure 12 to controlling signal.So 900 output power curve is tiltedly distinguished in output control device 800 configurations or generation between between time slot 1 and time slot 2.After output power curve produced, estimator 87 was also estimated and/or determine in the output power curve that wherein all power outputs are less than a preset critical between the transient period of (and tiltedly distinguish 900) between transient period.At some specific embodiment, be included between transient period output power curve during minimum point took place or the time.Therefore, between the transient period of output power curve, controller 839 can switch to GMSK modulation type (time slot 2) from 8PSK modulation type (time slot 1) with power amplifier 831.
Therefore, by the performance number/modulation type that switches between transient period, this performance number/modulation type switches the transient current that produces to be taken place between transient period, and can be controlled by the method and the device of above-mentioned reduction power of the present invention.Shown in figure 13, the output power value that is meant of transient current increases suddenly and reduces forming a peak, and has suitable high power value.In the present invention, because the output power value between transient period can or be lower than a critical value for the lowest power value, therefore, no matter any unexpected increase, the performance number on the peak that is produced by transient current is may command and will can not surpass the timing protection all.
In sum; Though the present invention discloses as above with a preferred embodiment; Right its is not in order to limit the present invention; Those skilled in the art can do various changes and retouching under the premise without departing from the spirit and scope of the present invention, so protection scope of the present invention is as the criterion with claim of the present invention.
Claims (16)
1. oblique control device between a time slot that switches between first time slot and second time slot, wherein this first time slot has one first performance number, and this second time slot that is adjacent to this first time slot has one second performance number, and this control device comprises:
One output control device is used to one and tiltedly distinguishes configuration or produce an output power curve, and wherein this output power curve is the curve with concave shape; And
Estimator during one transition is coupled to this output control device, in order to estimate during a transition oblique between this time slot that switches of this output power curve;
Wherein this output control device comprises memory and curve generator; This memory is in order to provide at least one reference power curve; This curve generator is coupled to this memory; In order to according to this at least one reference power curved configuration or produce this output power curve; Wherein at least one reference power curve of this in this memory comprises the first reference power curve and the second reference power curve, and this curve generator produces a first of this output power curve from this first reference power curve and this first performance number, and produces a second portion of this output power curve from this second reference power curve and this second performance number.
2. control device as claimed in claim 1, wherein this control device also comprises a controller, is coupled to estimator between this transient period, between this transient period, switches to this second performance number from this first performance number in order to order a power amplifier.
3. control device as claimed in claim 1; Wherein this first time slot has one first modulation type, this second time slot has one second modulation type; And this control device also comprises a controller; Be coupled to estimator between this transient period, between this transient period, switch to this second modulation type from this first modulation type in order to order a power amplifier.
4. device as claimed in claim 1, wherein this output power curve this performance number between this transient period is lower than a critical value.
5. device as claimed in claim 1, wherein the minimum point of this output power curve occurs between this transient period.
6. control device as claimed in claim 1; Wherein this first reference power curve representation is FL (t); And this second reference power curve representation is FR (t), and then the FL ' of this first of this output power curve (t) (t) produces according to following equation with this second portion FR ':
FL ' (t)=H+FL (t) * SL ', and
FR’(t)＝H+FR(t)*SR’，
Wherein, SL '=SL-H, SR '=SR-H, SL are this first performance numbers, and SR is this second performance number, and H is a default value.
7. control device as claimed in claim 6; Wherein this output control device also comprises the feeding mechanism that is coupled to this curve generator; Be next to this preceding first time slot of this oblique district this first performance number in order to provide in the very first time; And provide and be next to this tiltedly this second time slot behind the district is in this second performance number of second time, wherein this second time slot uses the modulation type that is different from this first time slot adjacent to this first time slot and this second time slot.
8. control device as claimed in claim 6, wherein, H is the minimal power values of this output power curve, or is lower than the smaller 6dBm in this first performance number and this second performance number at least.
9. oblique control method between a time slot that switches between first time slot and second time slot, wherein this first time slot has one first performance number, and this second time slot that is adjacent to this first time slot has one second performance number, and this control method comprises:
At least one reference power curve is provided;
According to this at least one reference power curved configuration or produce an output power curve of tiltedly distinguishing, wherein this output power curve is the curve with concave shape; And
Estimation is during a transition oblique between this time slot that switches of this output power curve;
Wherein this at least one reference power curve comprises the first reference power curve and the second reference power curve; Produce a first of this output power curve from this first reference power curve and this first performance number, and produce a second portion of this output power curve from this second reference power curve and this second performance number.
10. control method as claimed in claim 9, wherein this control method also comprises:
Order a power amplifier between this transient period, to switch to this second performance number from this first performance number.
11. control method as claimed in claim 9, wherein this first time slot has one first modulation type, this second time slot has one second modulation type, and this control method also comprises:
Order a power amplifier between this transient period, to switch to this second modulation type from this first modulation type.
12. control method as claimed in claim 9, wherein this output power curve this performance number between this transient period is lower than a critical value.
13. control method as claimed in claim 9, wherein the minimum point of this output power curve occurs between this transient period.
14. control method as claimed in claim 9; Wherein this first reference power curve representation is FL (t); And this second reference power curve representation is FR (t); Then the FL ' of this first of this output power curve (t) (t) produces according to following equation with this second portion FR ': FL ' (t)=H+FL (t) * SL ', reach FR ' (t)=H+FR (t) * SR '
Wherein, SL '=SL-H, SR '=SR-H, SL are this first performance numbers, and SR is this second performance number, and H is a default value.
15. control method as claimed in claim 14, wherein this control method also comprises:
Provide and be next to this preceding first time slot of this oblique district this first performance number in the very first time; And
Provide be next to this tiltedly this second time slot behind the district in this second performance number of second time;
Wherein this second time slot uses the modulation type that is different from this first time slot adjacent to this first time slot and this second time slot.
16. control method as claimed in claim 14, wherein, H is the minimal power values of this output power curve, or is lower than the smaller 6dBm in this first performance number and this second performance number at least.
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| CN 200810176739 CN101431353B (en) | 2004-07-09 | 2005-07-06 | Control method and apparatus for delivering power amplifier |
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| CN200410063787 | 2004-07-09 | ||
| CN200410063787.2 | 2004-07-09 | ||
| US11/124,476 US7489908B2 (en) | 2004-06-18 | 2005-05-06 | Method and apparatus for controlling a TX power amplifier |
| US11/124,476 | 2005-05-06 | ||
| US11/147,152 | 2005-06-06 | ||
| US11/147,152 US7489909B2 (en) | 2004-06-18 | 2005-06-06 | Method and apparatus for controlling a TX power amplifier |
| CN 200810176739 CN101431353B (en) | 2004-07-09 | 2005-07-06 | Control method and apparatus for delivering power amplifier |
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| CNB2005100819042A Division CN100508422C (en) | 2004-07-09 | 2005-07-06 | Controlling method and apparatus for transfer power amplifier |
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| CN1209231A (en) * | 1995-12-19 | 1999-02-24 | 艾利森电话股份有限公司 | Method for reducing undesirable RF interference generated between bursts in a TDMA system |
| WO2004021659A1 (en) * | 2002-08-28 | 2004-03-11 | Philips Intellectual Property & Standards Gmbh | Method for generating i/q signal in a tdma transmitter and corresponding modulator |
| CN1592121A (en) * | 2003-07-11 | 2005-03-09 | 三星电子株式会社 | Power ramping controller and an associated power ramping method for transmitter |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1209231A (en) * | 1995-12-19 | 1999-02-24 | 艾利森电话股份有限公司 | Method for reducing undesirable RF interference generated between bursts in a TDMA system |
| WO2004021659A1 (en) * | 2002-08-28 | 2004-03-11 | Philips Intellectual Property & Standards Gmbh | Method for generating i/q signal in a tdma transmitter and corresponding modulator |
| CN1592121A (en) * | 2003-07-11 | 2005-03-09 | 三星电子株式会社 | Power ramping controller and an associated power ramping method for transmitter |
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