CN101335546B - Radio frequency auto-gain control system and method - Google Patents
Radio frequency auto-gain control system and method Download PDFInfo
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- CN101335546B CN101335546B CN2007101457156A CN200710145715A CN101335546B CN 101335546 B CN101335546 B CN 101335546B CN 2007101457156 A CN2007101457156 A CN 2007101457156A CN 200710145715 A CN200710145715 A CN 200710145715A CN 101335546 B CN101335546 B CN 101335546B
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Abstract
The invention relates to a radio-frequency auto gain control method, comprising the following steps: step S202: the radio-frequency gain is set as N grade adjustable gain according to the requirements of the static sensitivity index of a radio-frequency receiver as well as sensitivity ranges corresponding to different radio-frequency gain values; step S204: when being powered and initialized, a variable gain amplifier is configured with an initial default gain value, and after the radio-frequency receiver works normally, the power of the receiving signal of an antenna port is calculated at a base band; step S206: according to the obtained power of the receiving signal of the antenna port and combining with the presently configured radio-frequency gain value, the radio-frequency gain values that need to be modified are calculated, and the radio-frequency gain value calculated by the former step is configured to the radio-frequency amplifier by a feedback control unit. The method of the invention can calculate the gain value of the radio-frequency amplifier at the base band in the condition that the radio-frequency or digital intermediate frequency part is not added with a power detection circuit, thus realizing the automatic gain control of radio-frequency.
Description
Technical field
The present invention relates to the communications field, relate in particular to radio frequency auto-gain control system and method.
Background technology
In field of wireless communication, due to the transmitting power of different mobile phones and the difference of path loss, caused the strong and weak difference of the different mobile phone signals of base station reception.In addition, when mobile phone location moves, also can cause the power of base station received signal to change.If base station received signal is too large, may exceed the linear amplification range of radio-frequency transmitter; And base station received signal might detect useful signal again when weak, and this has larger dynamic range and receiving sensitivity with regard to the radio-frequency transmitter that requires the base station.
It is to achieve a butt joint by the yield value of regulating the amplifier in radio-frequency transmitter to receive the automatic adjusting of radiofrequency signal size that the radio frequency automatic gain is controlled.When radio frequency receiving signal is larger, reduce the gain of receiver amplifier, avoid amplifier saturation; When receiving signal hour, increase the gain of radio-frequency transmitter amplifier, amplify and receive signal.As seen, control the raising that can effectively realize radio-frequency transmitter dynamic range and receiving sensitivity by the radio frequency automatic gain.
Traditional radio-frequency automatic gain control method, is turned down the amplifier gain value if it is too large the reception signal to be detected for to add power-sensing circuit after variable gain amplifier; If it is too little the reception signal to be detected, the amplifier gain value is heightened.The power-sensing circuit that traditional radio-frequency automatic gain control method adds had both increased the volume of receiver, had increased again the cost of receiver.
Application number is the Chinese patent application " a kind of method of receiver and reception wireless signal " of CN200610109348, disclose a kind of envelope signal power that detects in digital intermediate frequency, then adjusted the auto gain control method of rf gain according to the envelope signal power that detects.Application number is the Chinese patent application " wireless device and gain control method that carrying out automatic gain is controlled " of CN200510137588, a kind of received signal strength that adopts the received signal strength checkout gear to detect antenna opening is disclosed, calculated the feedback data of gain feedback control circuit by the feedback data conversion equipment, as the gain control value of automatic gain control circuit.The core concept of these two pieces of patents is all at digital intermediate frequency or radio frequency part applied power testing circuit, according to power detection result feedback automatic gain control value, controls effect undesirable.
Summary of the invention
For above one or more problems, the invention provides a kind of radio frequency auto-gain control system and method, do not need the applied power testing circuit, the received signal power that can directly calculate according to base band judges the power of signal.
Radio frequency auto-gain control system of the present invention comprises: antenna is used for receiving and sending radiofrequency signal; Variable gain amplifier, be used for to antenna reception to signal carry out automatic gain and control; Radio-frequency transmitter is connected to variable gain amplifier, is used for the radiofrequency signal that receives is mixed down analog baseband signal; Analog-to-digital conversion module is used for analog baseband signal is converted to digital signal, and digital signal is sent to baseband processing module; Baseband processing module is used for carrying out Base-Band Processing, calculates and arranges the yield value of variable gain amplifier, and by feedback control module, yield value is fed back to variable gain amplifier; And feedback control module, be used for carrying out FEEDBACK CONTROL under the control of baseband processing module.
Baseband processing module comprises: the gain level setting unit, static sensitivity index request and the range of sensitivity corresponding to different radio frequency yield value according to receiver, the rf gain value of variable gain amplifier is set to N level adjustable gain, and the initial default yield value; And the yield value computing unit, be used for calculating antenna receiving signal power, according to the yield value calculating current gain value of signal power and Set For Current, and by feedback control module, current gain value is sent to variable gain amplifier.
The setting principle of N level adjustable gain comprises: yield value corresponding to N level adjustable gain can make receiver sensitivity satisfy the static sensitivity index request by the tunable radio frequency rank that gains.
Can set the acquiescence yield value according to the application scenarios of base station, wherein, in the situation that the acquiescence yield value that arranges for outdoor cover type macro base station is higher than in the situation that be the acquiescence yield value that indoor cover type little base station arranges.
Be that the threshold value that minimum gain value and minimum gain value switch to a high stage gain is Th in current gain value
1,2Situation under: if the current time slots power of present frame is less than or equal to Th
1,2, current gain value is tuned up a grade as the yield value of next frame; And if the current time slots power of present frame is greater than Th
1,2, keep current gain value as the yield value of next frame.
Be that the threshold value that maxgain value and maxgain value are switched to a low stage gain is Th in current gain value
N, N-1Situation under: if the current time slots power of present frame is more than or equal to Th
N, N-1, current gain value is turned down a grade as the yield value of next frame; And if the current time slots power of present frame is less than Th
N, N-1, keep current gain value as the yield value of next frame.
Be Th in current gain value greater than the threshold value that minimum gain value switches to a high stage gain less than maxgain value and current gain value
N, n+1, the threshold value that wherein 1＜n＜N, and current gain value switches to a low stage gain is Th
N, n-1, wherein in the situation of 1＜n＜N: if the current time slots power of present frame is more than or equal to Th
N, n-1, current gain value is turned down a grade as the yield value of next frame; If the current time slots power of present frame is less than or equal to Th
N, n+1, current gain value is tuned up a grade as the yield value of next frame; And if the current time slots power of present frame is greater than Th
N, n+1Less than Th
N, n+1, Th wherein
N, n-1Greater than Th
N, n+1, keep current gain value as the yield value of next frame.
Radio-frequency automatic gain control method according to the present invention comprises the following steps: step S202, baseband processing module is according to static sensitivity index request and the range of sensitivity corresponding to different radio frequency yield value of receiver, and the rf gain value of variable gain amplifier is set to N level adjustable gain; Step S204 is variable gain amplifier configuration initial default yield value when power-up initializing, and after operation of receiver was normal, baseband processing module calculated antenna receiving signal power; Step S206, baseband processing module calculates the next frame yield value according to the yield value of signal power and Set For Current, and by feedback control module, the next frame yield value is sent to variable gain amplifier.
The setting principle of N level adjustable gain comprises: yield value corresponding to N level adjustable gain can make receiver sensitivity satisfy the static sensitivity index request by the tunable radio frequency rank that gains.
Can set the acquiescence yield value according to the application scenarios of base station, wherein, in the situation that the acquiescence yield value that arranges for outdoor cover type macro base station is higher than in the situation that be the acquiescence yield value that indoor cover type little base station arranges.
Be that the threshold value that minimum gain value and minimum gain value switch to a high stage gain is Th in current gain value
1,2Situation under: if the current time slots power of present frame is less than or equal to Th
1,2, current gain value is tuned up a grade as the yield value of next frame; And if the current time slots power of present frame is greater than Th
1,2, keep current gain value as the yield value of next frame.
Be that the threshold value that maxgain value and maxgain value are switched to a low stage gain is Th in current gain value
N, N-1Situation under: if the current time slots power of present frame is more than or equal to Th
N, N-1, current gain value is turned down a grade as the yield value of next frame; And if the current time slots power of present frame is less than Th
N, N-1, keep current gain value as the yield value of next frame.
Be Th in current gain value greater than the threshold value that minimum gain value switches to a high stage gain less than maxgain value and current gain value
N, n+1, the threshold value that wherein 1＜n＜N, and current gain value switches to a low stage gain is Th
N, n-1, 1＜n＜N wherein, situation under: if the current time slots power of present frame is more than or equal to Th
N, n-1, current gain value is turned down a grade as the yield value of next frame; If the current time slots power of present frame is less than or equal to Th
N, n+1, current gain value is tuned up a grade as the yield value of next frame; And if the current time slots power of present frame is greater than Th
N, n+1Less than Th
N, n-1, Th wherein
N, n-1Greater than Th
N, n+1, keep current gain value as the yield value of next frame.
New radio-frequency automatic gain control method proposed by the invention does not need the applied power testing circuit, and the received signal power that directly calculates according to base band judges the power of signal, if receive signal greater than threshold value, the amplifier gain value is turned down; If receive signal less than threshold value, the amplifier gain value heightened.The method realizes simple, has both reduced the volume of receiver, has reduced again receiver cost, can effectively improve receiver dynamic range and receiving sensitivity.
Description of drawings
Accompanying drawing described herein is used to provide a further understanding of the present invention, consists of the application's a part, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not consist of improper restriction of the present invention.In the accompanying drawings:
Fig. 1 is the radio frequency auto-gain control system correlation module figure of embodiments of the invention.
Fig. 2 is the radio-frequency automatic gain control method flow chart of embodiments of the invention.
Fig. 3 is the gsm system wireless frame structure figure of embodiments of the invention.
Embodiment
Below with reference to accompanying drawing, describe the specific embodiment of the present invention in detail.
Fig. 1 is the radio frequency auto-gain control system correlation module figure of embodiments of the invention.Radio frequency auto-gain control system of the present invention consists of the following components: reception antenna 102, variable gain amplifier 104, radio-frequency transmitter 106, AD conversion unit (ADC) 108, baseband processing unit 110, and feedback control unit 112.
Antenna is used for receiving and sending radiofrequency signal.Variable gain amplifier be used for to antenna reception to signal carry out that automatic gain is controlled, radio-frequency transmitter, be connected to variable gain amplifier, be used for the radiofrequency signal that receives is mixed down analog baseband signal.Analog-to-digital conversion module is used for analog baseband signal is converted to digital signal, and digital signal is sent to baseband processing module.Baseband processing module is used for carrying out Base-Band Processing, calculates and arranges the yield value of variable gain amplifier, and by feedback control module, yield value is fed back to variable gain amplifier.Feedback control module is used for carrying out FEEDBACK CONTROL under the control of baseband processing module.
The setting principle of N level adjustable gain comprises: yield value corresponding to N level adjustable gain can make radio-frequency transmitter sensitivity satisfy the static sensitivity index request by the tunable radio frequency rank that gains.
Can set the acquiescence yield value according to the application scenarios of base station, wherein, in the situation that the acquiescence yield value that arranges for outdoor cover type macro base station is higher than in the situation that be the acquiescence yield value that indoor cover type little base station arranges.
Be that the threshold value that minimum gain value and minimum gain value switch to a high stage gain is Th in current gain value
1,2Situation under: if the current time slots power of present frame is less than or equal to Th
1,2, current gain value is tuned up a grade as the yield value of next frame; And if the current time slots power of present frame is greater than Th
1,2, keep current gain value as the yield value of next frame.
Be that the threshold value that maxgain value and maxgain value are switched to a low stage gain is Th in current gain value
N, N-1Situation under: if the current time slots power of present frame is more than or equal to Th
N, N-1, current gain value is turned down a grade as the yield value of next frame; And if the current time slots power of present frame is less than Th
N, N-1, keep current gain value as the yield value of next frame.
Be Th in current gain value greater than the threshold value that minimum gain value switches to a high stage gain less than maxgain value and current gain value
N, n+1, 1＜n＜N, and the threshold value that current gain value is switched to a low stage gain is Th
N, n-1, 1＜n＜N, situation under: if the current time slots power of present frame is more than or equal to Th
N, n-1, current gain value is turned down a grade as the yield value of next frame; If the current time slots power of present frame is less than or equal to Th
N, n+1, current gain value is tuned up a grade as the yield value of next frame; And if the current time slots power of present frame is greater than Th
N, n+1Less than Th
N, n-1, Th wherein
N, n-1Greater than Th
N, n+1, keep current gain value as the yield value of next frame.
Fig. 2 is the radio-frequency automatic gain control method flow chart of embodiments of the invention.The method that radio frequency automatic gain of the present invention is controlled is as follows:
Step S202, static sensitivity index request and the range of sensitivity corresponding to different radio frequency yield value according to radio-frequency transmitter are set as N level adjustable gain with rf gain.
Step S204 to initial default yield value of variable gain amplifier configuration, after radio-frequency transmitter is working properly, calculates the antenna opening received signal power in base band when power-up initializing.
Step S206 according to antenna opening received signal power obtained in the previous step, in conjunction with the rf gain value of current configuration, calculates the rf gain value that revise, and with the rf gain value that calculates, is configured in variable gain amplifier by feedback control unit.
If conversation does not finish, repeating step S204 and step 206; If end of conversation stops the automatic gain control flow.
Below just will be take gsm system as example, the frame structure of gsm system radio frames as shown in Figure 3, the method that radio frequency automatic gain involved in the present invention is controlled is described below:
The first step, baseband processing module is set as N level adjustable gain according to static sensitivity index request and the range of sensitivity corresponding to different radio frequency yield value of radio-frequency transmitter with rf gain:
The setting principle of N level adjustable gain is, for yield value g corresponding to N level adjustable gain
1, g
2..., g
N, g
1＜g
2＜...＜g
N, can make radio-frequency transmitter sensitivity satisfy the static sensitivity index request by adjusting the rf gain rank.
For example, radio-frequency transmitter static sensitivity index request is [P
min(dBm), P
max(dBm)], rf gain g
1The corresponding range of sensitivity is [P
2(dBm), P
max(dBm)], rf gain g
2The corresponding range of sensitivity is [P
min(dBm), P
1And P (dBm)],
2≤ P
1, just rf gain can be set as 2 grades adjustable, by the adjustment g that gains
1And g
2Just enough make sensitivity satisfy index request.
Second step, baseband processing module configure an initial default yield value to variable gain amplifier when power-up initializing:
Setting for the acquiescence yield value should be set according to the application scenarios of base station, if outdoor cover type macro base station should be set to higher rf gain value; If indoor cover type little base station should be set to lower rf gain value.
In the 3rd step, after radio-frequency transmitter was working properly, baseband processing module calculated the antenna opening received signal power:
The concrete implementation step of this step is:
If working as the up frame number of pre-treatment is i, timeslot number is j, and the baseband receiving signals IQ power average value of current time slots is
Wherein, M
1, M
2Be initial IQ index and the termination IQ index that averages, I
(i, j)(m) and Q
(i, j)(m) be respectively real part and the imaginary part of symbol m.
Baseband processing module is in conjunction with the rf gain value of current configuration, the baseband receiving signals power that calculates according to baseband receiving signals power and the fixing corresponding relation (this corresponding relation can be tested and draw) of antenna opening received signal power
Converse the antenna opening received signal power
If conventional time slot is processed and same user's upward signal sends in the same time slot of different frame continuously, adopt following recurrence average formula to the antenna opening received signal power
Carry out smoothly, obtain the antenna opening received signal power after level and smooth
Wherein, α ∈ (0,1] be the recurrence Averagefactor,
The level and smooth result of antenna opening received signal power for the identical time slot of previous frame.The antenna opening received signal power of the current time slots of present frame
If random access time slot is processed or same user's upward signal conventional time slot of discontinuous transmission in the same time slot of different frame is processed, need not the antenna opening received signal power
Carry out smoothly the antenna opening received signal power of the current time slots of present frame
In the 4th step, baseband processing module calculates according to antenna opening received signal power obtained in the previous step, in conjunction with the rf gain value of current configuration the rf gain value that revise:
The concrete implementation step of this step is:
Suppose current rf gain value
That sets is the minimum value g that gains
1, from least gain g
1To a high stage gain g
2The threshold value of switching is Th
1,2Divide following two kinds of dispositions to process:
If the current time slots power P of present frame
(i, j)≤ Th
1,2, namely signal diminishes and exceeds gain g
1Corresponding input reference signal tunes up a grade with rf gain, the next frame gain that should configure
If the current time slots power P of present frame
(i, j)＞Th
1,2, namely signal is still at gain g
1Corresponding input reference signal, the next frame gain that should configure remains unchanged
Suppose current rf gain value
That sets is the maximum g that gains
N, from maximum gain g
NTo a low stage gain g
N-1The threshold value of switching is Th
N, N-1Divide following two kinds of dispositions to process:
If the current time slots power P of present frame
(i, j)〉=Th
N, N-1, namely signal becomes large and surpasses gain g
NCorresponding input reference signal is turned rf gain down a grade, the next frame gain that should configure
If the current time slots power P of present frame
(i, j)＜Th
N, N-1, namely signal is still at gain g
NCorresponding input reference signal, the next frame gain that should configure remains unchanged
Suppose current rf gain value
That set is gain g
n, 1＜n＜N is from current gain g
nTo a low stage gain g
n-1The threshold value of switching is Th
N, n-1From current gain g
nTo a high stage gain g
n+1The threshold value of switching is Th
N, n+1, Th wherein
N, n-1＞Th
N, n+1Divide following three kinds of dispositions to process:
If the current time slots power P of present frame
(i, j)〉=Th
N, n-1, namely signal becomes large and surpasses gain g
nCorresponding input reference signal is turned rf gain down a grade, the next frame gain that should configure
If the current time slots power P of present frame
(i, j)≤ Th
N, n+1, namely signal diminishes and surpasses gain g
nCorresponding input reference signal tunes up a grade with rf gain, the next frame gain that should configure
If the current time slots power Th of present frame
N, n+1＜P
(i, j)＜Th
N, n-1, namely signal is still at gain g
nCorresponding input reference signal, the next frame gain that should configure remains unchanged
In the 5th step, baseband processing module is configured to by feedback control unit the rf gain value that previous step calculates in variable gain amplifier:
If the yield value that j time slot of the i frame that is calculated by previous step should configure is
The concrete implementation step of this step is:
If conventional time slot is processed and same user's upward signal sends in the same time slot of different frame continuously, will
Value was configured to variable gain amplifier by feedback control unit before the time slot j of (i+1) frame arrives in.
If conventional time slot is processed and upward signal discontinuous transmission in the same time slot of different frame of same user, will
Value was configured to variable gain amplifier by feedback control unit before the time slot j of this user's next up access frame arrives in.
If random access time slot is processed, establishing the present frame frame number is Δ F with last frame number difference at this time slot change rf gain
n, the threshold value that changes of Random Access Channel AGC is Th
RACH, this step is divided into again following two kinds of situations processing:
If a) Δ F
n＞Th
RACH, namely present frame surpasses threshold T h with last frame number difference at this time slot change AGC
RACH, will
Value was configured to variable gain amplifier by feedback control unit before the time slot j of (i+1) frame arrives in.
B) if Δ F
n≤ Th
RACH, namely present frame changes the frame number difference of AGC over threshold T h with last at this time slot
RACH, the time slot j at (i+1) frame does not change the rf gain value.
Threshold T h
RACHThe number of times of access again and access interval setting according to Random Access Channel.
The 6th step, if conversation finishes, the 3rd step of repetition, the 4th step and the 5th step; If end of conversation finishes the automatic gain control flow.
The present invention sets forth as an example of the radio-frequency automatic gain control method of GSM base station example, but the invention is not restricted to only use at gsm system, and other communication systems stand good.
The above is only the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (11)
1. radio frequency auto-gain control system is characterized in that comprising:
Antenna is used for receiving and sending radiofrequency signal;
Variable gain amplifier, be used for to described antenna reception to signal carry out automatic gain and control;
Radio-frequency transmitter is connected to described variable gain amplifier, is used for the radiofrequency signal that receives is mixed down analog baseband signal;
Analog-to-digital conversion module is used for described analog baseband signal is converted to digital signal, and described digital signal is sent to baseband processing module; And
Described baseband processing module is used for carrying out Base-Band Processing, calculates and arranges the yield value of described variable gain amplifier, and by feedback control module, described yield value is fed back to described variable gain amplifier; And
Described feedback control module is used for carrying out FEEDBACK CONTROL under the control of described baseband processing module;
Wherein, described baseband processing module comprises:
The gain level setting unit, according to static sensitivity index request and the range of sensitivity corresponding to different radio frequency yield value of radio-frequency transmitter, the rf gain value of described variable gain amplifier is set to N level adjustable gain, and the initial default yield value, wherein, N is positive integer; And
The yield value computing unit is used for calculating described antenna receiving signal power, according to the yield value calculating current gain value of described signal power and Set For Current, and by described feedback control module, described current gain value is sent to described variable gain amplifier.
2. radio frequency auto-gain control system according to claim 1, it is characterized in that, the setting principle of described N level adjustable gain comprises: yield value corresponding to described N level adjustable gain can make radio-frequency transmitter sensitivity satisfy described static sensitivity index request by the tunable radio frequency rank that gains.
3. radio frequency auto-gain control system according to claim 1, it is characterized in that, set described acquiescence yield value according to the application scenarios of base station, wherein, in the situation that the described acquiescence yield value that arranges for outdoor cover type macro base station higher than in the situation that the described acquiescence yield value that arranges for indoor cover type little base station.
4. the described radio frequency auto-gain control system of any one according to claim 1 to 3, is characterized in that, is that the threshold value that minimum gain value and described minimum gain value switch to a high stage gain is Th in current gain value
1,2Situation under:
If the current time slots power of present frame is less than or equal to Th
1,2, current gain value is tuned up a grade as the yield value of next frame; And
If the current time slots power of present frame is greater than Th
1,2, keep described current gain value as the yield value of next frame.
5. the described radio frequency auto-gain control system of any one according to claim 1 to 3, is characterized in that, is that the threshold value that maxgain value and described maxgain value are switched to a low stage gain is Th in current gain value
N, N-1Situation under:
If the current time slots power of present frame is more than or equal to Th
N, N-1, current gain value is turned down a grade as the yield value of next frame; And
If the current time slots power of present frame is less than Th
N, N-1, keep described current gain value as the yield value of next frame.
6. the described radio frequency auto-gain control system of any one according to claim 1 to 3, is characterized in that, is Th in current gain value greater than the threshold value that minimum gain value switches to a high stage gain less than maxgain value and described current gain value
N, n+1, the threshold value that wherein 1＜n＜N, and described current gain value switches to a low stage gain is Th
N, n-1, 1＜n＜N wherein, situation under:
If the current time slots power of present frame is more than or equal to described Th
N, n-1, described current gain value is turned down a grade as the yield value of next frame;
If the current time slots power of present frame is less than or equal to described Th
N, n+1, described current gain value is tuned up a grade as the yield value of next frame; And
If the current time slots power of present frame is greater than Th
N, n+1Less than Th
N, n-1, Th wherein
N, n-1Greater than Th
N, n+1, keep current gain value as the yield value of next frame.
7. radio-frequency automatic gain control method that adopts the described radio frequency auto-gain control system of any one in claim 1 to 6 is characterized in that comprising the following steps:
Step 1, baseband processing module is according to static sensitivity index request and the range of sensitivity corresponding to different radio frequency yield value of radio-frequency transmitter, and the rf gain value of variable gain amplifier is set to N level adjustable gain;
Step 2 is described variable gain amplifier configuration initial default yield value when power-up initializing, and after radio-frequency transmitter was working properly, described baseband processing module calculated antenna receiving signal power; And
Step 3, described baseband processing module calculates the next frame yield value according to the yield value of described signal power and Set For Current, and by described feedback control module, described next frame yield value is sent to described variable gain amplifier.
8. radio-frequency automatic gain control method according to claim 7, it is characterized in that, the setting principle of described N level adjustable gain comprises: yield value corresponding to described N level adjustable gain can make radio-frequency transmitter sensitivity satisfy described static sensitivity index request by the tunable radio frequency rank that gains.
9. according to claim 7 or 8 described radio-frequency automatic gain control methods, is characterized in that, is that the threshold value that minimum gain value and described minimum gain value switch to a high stage gain is Th in current gain value
1,2Situation under:
If the current time slots power of present frame is less than or equal to Th
1,2, current gain value is tuned up a grade as the yield value of next frame; And
If the current time slots power of present frame is greater than Th
1,2, keep described current gain value as the yield value of next frame.
10. according to claim 7 or 8 described radio-frequency automatic gain control methods, is characterized in that, is that the threshold value that maxgain value and described maxgain value are switched to a low stage gain is Th in current gain value
N, N-1Situation under:
If the current time slots power of present frame is more than or equal to Th
N, N-1, current gain value is turned down a grade as the yield value of next frame; And
If the current time slots power of present frame is less than Th
N, N-1, keep described current gain value as the yield value of next frame.
11. according to claim 7 or 8 described radio-frequency automatic gain control methods is characterized in that, are Th in current gain value greater than the threshold value that minimum gain value switches to a high stage gain less than maxgain value and described current gain value
N, n+1, the threshold value that wherein 1＜n＜N, and described current gain value switches to a low stage gain is Th
N, n-1, 1＜n＜N wherein, situation under:
If the current time slots power of present frame is more than or equal to described Th
N, n-1, described current gain value is turned down a grade as the yield value of next frame;
If the current time slots power of present frame is less than or equal to described Th
N, n+1, described current gain value is tuned up a grade as the yield value of next frame; And
If the current time slots power of present frame is greater than Th
N, n+1Less than Th
N, n-1, Th wherein
N, n-1Greater than Th
N, n+1, keep current gain value as the yield value of next frame.
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| CN102413087B (en) * | 2010-09-21 | 2015-03-18 | 恒原百炼微电子科技(北京)有限公司 | Analogue adaptive gain control method applied to multi-band orthogonal frequency division multiplexing (MB-OFDM) system |
| CN102111166B (en) * | 2010-12-08 | 2013-07-31 | 大唐移动通信设备有限公司 | Method and equipment for regulating gain of radio-frequency amplifier |
| CN102186235B (en) * | 2011-04-01 | 2014-02-19 | 华为技术有限公司 | Automatic gain adjustment gain generation method and device |
| CN102707137A (en) * | 2012-07-03 | 2012-10-03 | 复旦大学 | Radio frequency power detection circuit |
| CN105744611A (en) * | 2014-12-10 | 2016-07-06 | 中兴通讯股份有限公司 | Method and device for realizing power control |
| CN105406881B (en) * | 2015-12-07 | 2018-12-28 | 中国电子科技集团公司第五十研究所 | The gain control and method of lookup table mode in software radio |
| CN108471296B (en) * | 2018-03-07 | 2021-09-10 | 中国电子科技集团公司第三十研究所 | High-precision rapid automatic gain control system suitable for short-time burst transmission |
| CN109738872A (en) * | 2019-01-11 | 2019-05-10 | 上海英恒电子有限公司 | A kind of radar Cochannel interference method and device |
| CN114301479A (en) * | 2022-01-18 | 2022-04-08 | 青岛联众芯云科技有限公司 | Power line carrier communication receiver and control method thereof |
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| CN1248094A (en) * | 1998-09-16 | 2000-03-22 | 松下电器产业株式会社 | Automatic gain control circuit, method, receiver and recording medium thereof |
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