CN104754720A - Method and device for adjusting AGC - Google Patents

Method and device for adjusting AGC Download PDF

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Publication number
CN104754720A
CN104754720A CN201310751412.4A CN201310751412A CN104754720A CN 104754720 A CN104754720 A CN 104754720A CN 201310751412 A CN201310751412 A CN 201310751412A CN 104754720 A CN104754720 A CN 104754720A
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slot
agc
time
present frame
value
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CN104754720B (en
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王欢
刘洪波
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Leadcore Technology Co Ltd
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Leadcore Technology Co Ltd
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04TPC
    • H04W52/52TPC using AGC [Automatic Gain Control] circuits or amplifiers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation
    • H04W72/044Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446Resources in time domain, e.g. slots or frames

Abstract

The invention relates to the field of communications and discloses a method and a device for adjusting AGC. The method and the device are capable of eliminating wrong adjustment of the AGC in a GPRS/EDGE service channel under a DTC scene and improving the service performance under the DTC scene. The method for adjusting the AGC comprises the steps of determining whether the time slot energy of a service time slot in a current frame is invalid, calculating the AGC value of the time slot energy when the time slot energy is not invalid, updating the AGC of the current frame service channel into the sum of a BCCH frequency point gain and a preset first threshold when the AGC is greater than or equal to the sum of the BCCH frequency point gain and the preset first threshold, the value of a demodulated soft bit sum is smaller than a preset second threshold, and meanwhile, the current frame is the last frame of a cod block, and when the AGC does not satisfy any one of the conditions, updating the AGC of the current frame service channel into the AGC value calculated according to the time slot energy.

Description

A kind of method and apparatus adjusting AGC
Technical field
The present invention relates to the communications field, particularly one adjustment AGC(Automatic Gain Control, automatic growth control) method and apparatus.
Background technology
The communication environment of wireless communication system is subject to the impact of geographical position, meteorological condition etc.; change more frequent; and change communication environment frequently the wireless communication signals being transmitted into receiving terminal usually can be made faint; in order to clearly obtain the wireless signal that transmitting terminal is launched; therefore, need to realize AGC at receiving terminal.GPRS(General Packet Radio Service, GPRS) and EDGE (Enhanced Data Rate for GSM Evolution, enhanced data rates for gsm evolution technology) system is time-division system, wherein, GSM is global system for mobile communications, and English full name is GlobalSystem For Mobile Communications.In GPRS/EDGE, employ DTX strategy, communication equipment by DTX(Discontinuous Transmission, discontinuous transmission) strategy reduces space interference, scheduling UE(User Equipment, subscriber equipment) resource, optimizing power consumption performance.
In the GPRS/EDGE system using DTX strategy, receiving terminal uses traditional multi-service channel AGC strategy, tradition multi-service channel AGC strategy as shown in Figure 1, in FIG, slot(time slot) 2 and slot(time slot) 3 be two business time-slots of network allocation in a data frame.Under conventional traffic channel AGC strategy, the AGC that the energy balane of eating dishes without rice or wine that the AGC of (N+1) frame mainly relies on the business time-slot of N frame obtains, can regard N frame as present frame, (N+1) frame be regarded as the next frame of present frame.
But, under DTX environment, present frame slot3 may not have effective energy, in addition, the gain obtained by the energy balane of eating dishes without rice or wine of present frame business time-slot slot3 is not necessarily suited for next frame, in this case, if the gain A GC obtained by the energy balane of eating dishes without rice or wine by present frame business time-slot slot3 uses in the next frame, next frame receiving terminal likely can be caused to occur because gain is excessive, and radio-frequency front-end processing module input signal is saturated, thus occurs the penalty situation of effective data decoding failure.In brief, traditional AGC strategy lacks the protection mechanism controlled gain, thus under causing some scene, Gain tuning loses control.
Summary of the invention
The object of the present invention is to provide a kind of method and apparatus adjusting AGC, the mistuning can eliminating AGC in GPRS/EDGE Traffic Channel under DTX scene is whole, promotes the service feature under DTX scene.
For solving the problems of the technologies described above, embodiments of the present invention provide a kind of method adjusting automatic growth control AGC, comprising:
Judge that whether the time slot energy of the business time-slot in present frame is invalid;
When judging that the time slot energy of the business time-slot in described present frame is invalid, terminate; When the time slot energy judging the business time-slot in described present frame is not invalid, calculate the AGC value of described time slot energy;
Judge described AGC value whether meet pre-conditioned in all conditions, describedly pre-conditionedly be: described AGC value be more than or equal to the gain of BCCH channel of broadcast control frequency and the first thresholding preset and, the soft bit of demodulation of described business time-slot and value be less than the second default thresholding, described present frame is the last frame of its place code block;
When described AGC value meet described pre-conditioned in all conditions time, the AGC value of described present frame Traffic Channel is updated to the gain of described BCCH frequency with preset the first thresholding and; When described AGC value do not meet described pre-conditioned in any one condition time, the AGC value of described present frame Traffic Channel is updated to the AGC value according to described time slot energy balane.
Embodiments of the present invention also provide a kind of device adjusting automatic growth control AGC, comprising:
Whether the first judging unit is invalid for judging the time slot energy of the business time-slot in present frame;
Computing unit, for when the time slot energy of the business time-slot that described first judging unit judges in described present frame is not invalid, calculates the AGC value of described time slot energy;
Second judging unit, for judge described AGC value whether meet pre-conditioned in all conditions, describedly pre-conditionedly be: described AGC value be more than or equal to the gain of BCCH channel of broadcast control frequency and the first thresholding preset and, the soft bit of demodulation and value be less than the second default thresholding, described present frame is the last frame of described present frame place code block;
Updating block, for meet when described AGC value described pre-conditioned in all conditions time, the AGC value of described present frame Traffic Channel is updated to the gain of BCCH channel of broadcast control frequency with preset the first thresholding and; When described AGC value do not meet described pre-conditioned in any one condition time, the AGC value of described present frame Traffic Channel is updated to the AGC value according to described time slot energy balane.
In terms of existing technologies, maximum difference is embodiment of the present invention, when the time slot energy of the business time-slot in present frame is not invalid, calculates the AGC of the time slot energy of the business time-slot of present frame; Then a protection mechanism is done to this AGC; the concrete grammar of protection mechanism is pre-conditioned for judging whether this AGC meets; when this AGC meets pre-conditioned, the AGC of present frame Traffic Channel is updated to the gain of BCCH channel of broadcast control frequency with preset the first thresholding and.Pass through protection mechanism; the AGC value that present frame obtains in a zone of reasonableness can be made; the AGC that next frame is used is the AGC value in a zone of reasonableness; prevent next frame from receiving and occur that radio-frequency front-end processing module input signal is saturated because gain is excessive, thus cause the generation of the penalty situation of valid data decoding failure.Thus can effectively under control DTX scene in GPRS/EDGE Traffic Channel the mistuning of AGC whole, improve the service feature under this scene.
Preferably, describedly judge whether comprise invalid comprising in the time slot energy of the business time-slot in described present frame: by soft for the demodulation of described business time-slot bit and value compare with the 3rd thresholding preset; When the soft bit of described demodulation and value be less than described 3rd thresholding time, judge that the time slot energy of the business time-slot in described present frame is invalid; When the soft bit of described demodulation and value be more than or equal to described 3rd thresholding time, judge that the time slot energy of the business time-slot in described present frame is not invalid.
Judged valid data whether may be comprised in the time slot energy of business time-slot by which, realize simple, and certain accuracy can be ensured.
Preferably, before the step whether the time slot energy of the described business time-slot judged in present frame is invalid, also comprise: judge that whether described present frame is the frame under multi-service time slot scene; If it is determined that be the frame under multi-service time slot scene, then select the soft bit of demodulation in the business time-slot of described present frame and the maximum business time-slot of value; In the step whether the time slot energy of the described business time-slot judged in present frame is invalid, judging the business time-slot whether time slot energy is invalid, is the business time-slot of described selection; If it is determined that be the frame under single business time-slot scene, then directly perform the step whether the time slot energy of the described business time-slot judged in present frame is invalid.
When scene is multi-service time slot, increases and select the step of business time-slot, select the soft bit of demodulation and the maximum business time-slot of value carry out the calculating of AGC, can guaranteed performance as far as possible, avoid risk.
Preferably, after the AGC value of described present frame Traffic Channel being upgraded, described method also comprises: the AGC value of preserving described Traffic Channel.
After calculating effective AGC value, this effective AGC value is saved, to do for subsequent use of next Traffic Channel reception.
Accompanying drawing explanation
Fig. 1 is traditional multi-service channel AGC strategy schematic diagram in prior art;
Fig. 2 is the method flow diagram of the adjustment AGC of first embodiment of the invention;
Fig. 3 is the structural representation of the device of the adjustment AGC of second embodiment of the invention;
Fig. 4 is the structural representation of the first judging unit in the device of the adjustment AGC of second embodiment of the invention;
Fig. 5 is the structural representation of the device of another kind of adjustment AGC in second embodiment of the invention.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, the embodiments of the present invention are explained in detail.But, persons of ordinary skill in the art may appreciate that in each execution mode of the present invention, proposing many ins and outs to make reader understand the application better.But, even without these ins and outs with based on the many variations of following execution mode and amendment, each claim of the application technical scheme required for protection also can be realized.
First embodiment of the invention provides a kind of method adjusting AGC, and the method is applied in GPRS scene or EDGE scene, and as shown in Figure 2, the method comprises the following steps:
201, judge that whether present frame is the frame under multi-service time slot scene.
Multiple traffic frame can be there is in each frame under multi-service time slot scene, under single business scenario, in each frame, only there is a traffic frame.
When present frame is the frame under multi-service time slot scene, perform step 202; When present frame is the frame under single business time-slot scene, owing to only there is a business time-slot, therefore do not exist select the soft bit of demodulation and the step of the maximum business time-slot of value, directly execution step 203.
202, select the soft bit of demodulation in the business time-slot of present frame and the maximum business time-slot of value.
Because in the scene of multi-service time slot, Frame has multiple business time-slot, in order to obtain in this frame Traffic Channel AGC value accurately, first need to select the soft bit of demodulation in multiple business time-slot and the maximum Traffic Channel of value, the soft bit of this demodulation and the maximum business time-slot of value be business time-slot maximum to the contribution of AGC value in this frame, the AGC value using the time slot energy balane of this business time-slot to obtain is the most accurate.
203, judge the soft bit of the demodulation of business time-slot and value whether be more than or equal to the 3rd default thresholding.
This 3rd thresholding preset can be denoted as TH3, the principle of TH3 setting is: the soft bit of demodulation of this time slot and lower than this threshold, think that this time slot does not have valid data certainly.Concrete, when the soft bit of demodulation and value be more than or equal to TH3 time, judge that the time slot energy of the business time-slot in present frame is not necessarily invalid, effective energy may be contained in the time slot energy of i.e. this business time-slot, effective energy is the energy that the time slot with valid data has, this effective energy, for calculating the AGC of next frame, can improve the performance of system, then performs step 204; When the soft bit of demodulation and value be less than TH3 time, judge that the time slot energy of the business time-slot in present frame is invalid, namely without valid data, directly terminate.
204, the AGC value of time slot energy is calculated.
AGC value according to the time slot energy balane time slot energy of business time-slot is prior art, and the present invention does not repeat at this.
After the AGC calculating time slot energy, done a gain protection to this AGC, concrete determination methods is shown in that step below describes.
205, judge this AGC whether meet pre-conditioned in all conditions.
The AGC value that the judgement increasing this step can make present frame obtain in a zone of reasonableness, thus make next frame use previous frame calculate gained zone of reasonableness in AGC value, can prevent next frame from receiving and occur that radio-frequency front-end processing module input signal is saturated because gain is excessive, thus cause the generation of the penalty situation of valid data decoding failure.
Step 205 specifically comprises: the judgement simultaneously carrying out three conditions below: judge AGC whether be more than or equal to the gain of BCCH frequency with preset the first thresholding and; Judge the soft bit of demodulation and value whether be less than the second default thresholding; Judge the last frame of present frame whether its place code block.
The gain of BCCH frequency refers to the AGC for BCCH channel frequency meeting receiver optimal performance, first thresholding can be denoted as TH1, second thresholding is denoted as TH2, the setting principle of TH1 is: under proper network environment, if setting gain is greater than target gain value and simultaneously less than or equal to (target gain value+TH1), can ensures the soft bit of this time slot demodulation and meet threshold TH2; The setting principle of TH2 is: if higher than this threshold, then think that this time slot has valid data certainly.Wherein, target gain value refers to the yield value meeting receiver optimal performance.
Judge that the reason of the present frame whether last frame of its place code block is: in the solution of the present invention, every frame all can carry out ineffectivity and upgrade judging to AGC, in order to avoid being protected because Traffic Channel frequency AGC and BCCH channel frequency AGC gap are too large by mistake, and cause Traffic Channel AGC to fail to make receiver demodulation performance reach the second thresholding always, thus the long period may be caused cannot to recover normal situation about receiving, so three frames are not protected before each block, in the end a frame does protection and can make to protect when next block receives next block can not be whole and occur that signal is saturated because of the mistuning that this block is possible.
When AGC be more than or equal to the gain of BCCH frequency and the first thresholding preset and, and the soft bit of demodulation and value be less than the second default thresholding, when simultaneously present frame is the last frame of its place code block, judge this AGC meet pre-conditioned in all conditions.
When AGC be less than the gain of BCCH frequency and the first thresholding preset and, or the soft bit of demodulation and value be more than or equal to the second default thresholding, or when present frame is not the last frame of its place code block, judge this AGC do not meet pre-conditioned in all conditions.
When AGC meet pre-conditioned in all conditions time, perform step 206, otherwise, perform step 207.
206, the AGC of present frame Traffic Channel is updated to the gain of BCCH frequency with preset the first thresholding and.
207, the AGC of present frame Traffic Channel is updated to the AGC value according to described time slot energy balane.
Especially, after being upgraded by the AGC of present frame Traffic Channel, method also comprises: the AGC preserving Traffic Channel.To do for subsequent use of next Traffic Channel reception.
In terms of existing technologies, maximum difference is embodiment of the present invention, when the time slot energy of the business time-slot in present frame is not invalid, calculates the AGC of the time slot energy of the business time-slot of present frame; Then a protection mechanism is done to this AGC; the concrete grammar of protection mechanism is pre-conditioned for judging whether this AGC meets; when this AGC meets pre-conditioned; confirm that this AGC is effective, the AGC of present frame Traffic Channel is updated to the gain of BCCH channel of broadcast control frequency and the first thresholding preset and.Pass through protection mechanism; the AGC value that present frame obtains in a zone of reasonableness can be made; the AGC that next frame is used is the AGC value in a zone of reasonableness; prevent next frame from receiving and occur that radio-frequency front-end processing module input signal is saturated because gain is excessive, thus cause the generation of the penalty situation of valid data decoding failure.Thus can effectively under control DTX scene in GPRS/EDGE Traffic Channel the mistuning of AGC whole, improve the service feature under this scene.
The step of various method divides above, just in order to be described clearly, can merge into a step or splitting some step, being decomposed into multiple step, when realizing as long as comprise identical logical relation, all in the protection range of this patent; To adding inessential amendment in algorithm or in flow process or introducing inessential design, but the core design not changing its algorithm and flow process is all in the protection range of this patent.
Second execution mode of the present invention relates to a kind of device 30 adjusting AGC, and be applied in single business time-slot scene of GPRS or EDGE, as shown in Figure 3, this device comprises:
Whether the first judging unit 301 is invalid for judging the time slot energy of the business time-slot in present frame.
Computing unit 302, for when the time slot energy of the business time-slot that the first judging unit judges in present frame is not invalid, calculates the AGC value of time slot energy.
Second judging unit 303, for judge AGC whether meet pre-conditioned in all conditions, pre-conditionedly be: AGC be more than or equal to the gain of BCCH channel of broadcast control frequency and the first thresholding preset and, the soft bit of demodulation and value be less than the second default thresholding, present frame is the last frame of present frame place code block.
Updating block 304, for meet as AGC pre-conditioned in all conditions time, the AGC of present frame Traffic Channel is updated to the gain of BCCH channel of broadcast control frequency with preset the first thresholding and; When AGC do not meet pre-conditioned in any one condition time, the AGC of present frame Traffic Channel is updated to the AGC value according to time slot energy balane.
Especially, this device also comprises the 3rd judging unit 305 and selected cell 306, and wherein, the 3rd judging unit 305 is for judging that whether present frame is the frame under multi-service time slot scene.
Selected cell 306 is for judging present frame as frame under multi-service time slot scene during when the 3rd judging unit, then select the soft bit of demodulation in the business time-slot of present frame and the maximum business time-slot of value.
The business time-slot of the first judging unit 301 also for using selected cell 305 to select judges; When the 3rd judging unit 305 judges present frame as frame under single business time-slot scene, the first judging unit 301 directly uses present frame to judge.
Further, as shown in Figure 4, the first judging unit 301 comprises following subelement:
Relatively subelement 3011, for by soft for demodulation bit and value compare with the 3rd thresholding preset.
Judge subelement 3012, for when the soft bit of demodulation and value be less than or equal to the 3rd thresholding time, the time slot energy of business time-slot in judgement present frame is invalid; When the soft bit of demodulation and value be greater than the 3rd thresholding time, judge that the time slot energy of the business time-slot in present frame is not invalid.
In terms of existing technologies, when the time slot Energy Efficient of the business time-slot in present frame time, the AGC obtained by the time slot energy balane of the business time-slot according to this present frame is as the AGC of present frame Traffic Channel for embodiment of the present invention; When the time slot energy of the business time-slot in present frame is invalid time, using the AGC that presets as the AGC of present frame Traffic Channel, the mistuning can eliminating AGC in GPRS/EDGE Traffic Channel under DTX scene is whole, promotes the service feature under DTX scene.
Especially, as shown in Figure 5, this device also comprises:
Storage unit 307, for preserving the AGC of Traffic Channel.
After being upgraded by the AGC of present frame Traffic Channel, storage unit preserves the AGC of Traffic Channel, to do for subsequent use of next Traffic Channel reception.
In terms of existing technologies, maximum difference is embodiment of the present invention, and when the time slot energy of the business time-slot that the first judging unit judges in present frame is not invalid, computing unit calculates the AGC of the time slot energy of the business time-slot of present frame; Then the second judging unit does a protection mechanism to this AGC; the concrete grammar of protection mechanism is pre-conditioned for judging whether this AGC meets; when this AGC meets pre-conditioned, updating block the AGC of present frame Traffic Channel is updated to the gain of BCCH channel of broadcast control frequency with preset the first thresholding and.Pass through protection mechanism; the AGC value that present frame obtains in a zone of reasonableness can be made; the AGC that next frame is used is the AGC value in a zone of reasonableness; prevent next frame from receiving and occur that radio-frequency front-end processing module input signal is saturated because gain is excessive, thus cause the generation of the penalty situation of valid data decoding failure.Thus can effectively under control DTX scene in GPRS/EDGE Traffic Channel the mistuning of AGC whole, improve the service feature under this scene.
It is worth mentioning that, be logic module about each module involved in the execution mode of device, in actual applications, a logical block can be a physical location, also can be a part for a physical location, can also realize with the combination of multiple physical location.The operation principle of each physical location can describing in reference method embodiment, and the present invention does not repeat them here.In addition, in order to outstanding innovative part of the present invention, the unit not too close with solving technical problem relation proposed by the invention is not introduced in present embodiment, but this does not show the unit that there is not other in present embodiment.
Persons of ordinary skill in the art may appreciate that the respective embodiments described above realize specific embodiments of the invention, and in actual applications, various change can be done to it in the form and details, and without departing from the spirit and scope of the present invention.

Claims (10)

1. adjust a method of automatic growth control AGC, it is characterized in that, comprising:
Judge that whether the time slot energy of the business time-slot in present frame is invalid;
When judging that the time slot energy of the business time-slot in described present frame is invalid, process ends; When the time slot energy judging the business time-slot in described present frame is not invalid, calculate the AGC value of described time slot energy;
Judge the AGC value of described calculating whether meet pre-conditioned in all conditions, describedly pre-conditionedly be: described AGC value be more than or equal to the gain of BCCH channel of broadcast control frequency and the first thresholding preset and, the soft bit of demodulation of described business time-slot and value be less than the second default thresholding, described present frame is the last frame of its place code block;
When described AGC value meet described pre-conditioned in all conditions time, the AGC value of described present frame Traffic Channel is updated to the gain of described BCCH frequency with preset the first thresholding and; When described AGC value do not meet described pre-conditioned in any one condition time, the AGC value of described present frame Traffic Channel is updated to the AGC value according to described time slot energy balane.
2. the method for adjustment AGC according to claim 1, is characterized in that, describedly judges that whether the time slot energy of the business time-slot in described present frame is invalid and comprises:
By soft for the demodulation of described business time-slot bit and value with preset the 3rd thresholding compare;
When the soft bit of described demodulation and value be less than described 3rd thresholding time, judge that the time slot energy of the business time-slot in described present frame is invalid; When the soft bit of described demodulation and value be more than or equal to described 3rd thresholding time, judge that the time slot energy of the business time-slot in described present frame is not invalid.
3. the method for adjustment AGC according to claim 1, is characterized in that, before the step whether the time slot energy of the described business time-slot judged in present frame is invalid, also comprise:
Judge that whether described present frame is the frame under multi-service time slot scene;
If it is determined that be the frame under multi-service time slot scene, then select the soft bit of demodulation in the business time-slot of described present frame and the maximum business time-slot of value; In the step whether the time slot energy of the described business time-slot judged in present frame is invalid, judging the business time-slot whether time slot energy is invalid, is the business time-slot of described selection;
If it is determined that be the frame under single business time-slot scene, then directly perform the step whether the time slot energy of the described business time-slot judged in present frame is invalid.
4. the method for adjustment AGC according to claim 1, is characterized in that, after the AGC value of described present frame Traffic Channel being upgraded, described method also comprises:
Preserve the AGC value of described Traffic Channel.
5. the method for the adjustment AGC according to Claims 1-4, is characterized in that, described method is applied in GPRS GPRS or enhanced data rates global system for mobile communications evolution technology EDGE scene.
6. adjust a device of automatic growth control AGC, it is characterized in that, comprising:
Whether the first judging unit is invalid for judging the time slot energy of the business time-slot in present frame;
Computing unit, for when the time slot energy of the business time-slot that described first judging unit judges in described present frame is not invalid, calculates the AGC value of described time slot energy;
Second judging unit, for judge AGC value that described computing unit calculates whether meet pre-conditioned in all conditions, describedly pre-conditionedly be: described AGC value be more than or equal to the gain of BCCH channel of broadcast control frequency and the first thresholding preset and, the soft bit of demodulation and value be less than the second default thresholding, described present frame is the last frame of described present frame place code block;
Updating block, for meet when described AGC value described pre-conditioned in all conditions time, the AGC value of described present frame Traffic Channel is updated to the gain of BCCH channel of broadcast control frequency with preset the first thresholding and; When described AGC value do not meet described pre-conditioned in any one condition time, the AGC value of described present frame Traffic Channel is updated to the AGC value according to described time slot energy balane.
7. the device of adjustment AGC according to claim 6, it is characterized in that, described first judging unit comprises following subelement:
Relatively subelement, for by soft for described demodulation bit and value compare with the 3rd thresholding preset;
Judge subelement, for when the soft bit of described demodulation and value be less than described 3rd thresholding time, judge that the time slot energy of the business time-slot in described present frame is invalid; When the soft bit of described demodulation and value be more than or equal to described 3rd thresholding time, judge that the time slot energy of the business time-slot in described present frame is not invalid.
8. the device of adjustment AGC according to claim 6, it is characterized in that, described device also comprises:
3rd judging unit, for judging that whether described present frame is the frame under multi-service time slot scene;
Selected cell, during for judging described present frame when described 3rd judging unit as frame under multi-service time slot scene, select the soft bit of demodulation in the business time-slot of described present frame and the maximum business time-slot of value;
In described first judging unit, the business time-slot using described selected cell to select judges; When described 3rd judging unit judges described present frame as frame under single business time-slot scene, described first judging unit directly uses described present frame to judge.
9. the device of adjustment AGC according to claim 6, it is characterized in that, described device also comprises:
Storage unit, for preserving the AGC value of described Traffic Channel.
10. according to the device of the adjustment AGC described in claim 6 to 9, it is characterized in that, described application of installation is in GPRS GPRS or enhanced data rates global system for mobile communications evolution technology EDGE scene.
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