CN106712812A - Bluetooth terminal, and Bluetooth receiving circuit and gain control method thereof - Google Patents
Bluetooth terminal, and Bluetooth receiving circuit and gain control method thereof Download PDFInfo
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- CN106712812A CN106712812A CN201611187135.9A CN201611187135A CN106712812A CN 106712812 A CN106712812 A CN 106712812A CN 201611187135 A CN201611187135 A CN 201611187135A CN 106712812 A CN106712812 A CN 106712812A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/40—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by components specially adapted for near-field transmission
- H04B5/48—Transceivers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/70—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes
- H04B5/72—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes for local intradevice communication
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Abstract
The invention discloses a Bluetooth terminal, and a Bluetooth receiving circuit and a gain control method thereof. The Bluetooth receiving circuit comprises an antenna, an adjustable gain power amplifier, a Bluetooth transceiver and a data processor, which are connected in sequence, wherein a gain control end of the adjustable gain power amplifier is connected with the data processor; the adjustable gain power amplifier is used for amplifying a received signal from the antenna according to a current set gain, the Bluetooth transceiver is used for demodulating the received signal processed by the adjustable gain power amplifier, and the data processor is used for controlling the gain of the adjustable gain power amplifier according to the signal power of the received signal demodulated by the Bluetooth transceiver; and a flexible adjustment process of the gain based on the received signal is achieved, thereby being beneficial for the Bluetooth receiving circuit to better adapt to various application scenes, and improving the user experience.
Description
Technical field
The present invention relates to electronic technology field, more particularly to a kind of Bluetooth terminal, Bluetooth receptions circuit and its gain control
Method.
Background technology
Bluetooth (Bluetooth) is a kind of data transmission technology based on wireless local area standard IEEE 802.11, especially
Suitable for the data transfer between short distance (typically in the range of 100 meters), because its transmission means is based on being wirelessly transferred,
It is electrically connected to transmit corresponding data without going through visible actual cable, it is convenient and practical, and technology maturation, use
Power consumption is relatively low, has therefore suffered from widely using.
Fig. 1 is referred to, Fig. 1 is the structural representation of existing Bluetooth RF circuit.Including Bluetooth receptions circuit and transmitting
Circuit, wherein receiving circuit include reception antenna, receiving filter, the external low noise amplifier of fixed gain, bluetooth transmitting-receiving letter
Machine and data processor.Reception signal from outside Bluetooth terminal is received by reception antenna, receiving filter will be described
Receive signal and be filtered treatment, filter some or all of interference signal therein, external low noise amplifier (external
Low Noise Amplifier) the reception signal after processing after filtering is amplified with fixed gain, and received by bluetooth
Sender is modulated and obtains corresponding useful signal, is processed accordingly finally by data processor, obtains effective
Data message or corresponding control signal etc..Radiating circuit include data processor, bluetootho transceiver, power amplifier,
Emission filter and transmitting antenna, are used to realize the process of signal transmitting.
The gain of existing Bluetooth receptions circuit is fixed, it is impossible to flexibly adjusted, and causes applicable scene limited,
In the presence of the situation that can not be well applicable some application scenarios.
The content of the invention
The present invention provides a kind of Bluetooth terminal, Bluetooth receptions circuit and its gain control method, to solve existing bluetooth
The gain of receiving circuit is fixed, it is impossible to according to the problem that current communication signal situation is adjusted flexibly.
In order to solve the above technical problems, the present invention uses following technical scheme:
A kind of Bluetooth receptions circuit, including：Antenna, adjustable gain power amplifier, the bluetootho transceiver being sequentially connected
And data processor, the gain control end of the adjustable gain power amplifier is connected with the data processor；
The adjustable gain power amplifier is used to enter the reception signal from the antenna according to current setting gain
The bluetootho transceiver is issued after row enhanced processing；
The bluetootho transceiver is used to be demodulated place to the reception signal from the adjustable gain power amplifier
The data processor is issued after reason；
The data processor is used for the signal power based on the reception signal after the demodulation process to the adjustable increasing
The gain of beneficial power amplifier is controlled.
Further, the data processor is used for the signal power based on the reception signal after the demodulation process to institute
State adjustable gain power amplifier gain be controlled including：
The data processor is used to judge that the reception signal after the demodulation process includes useful signal and interference signal
When, obtain the interfering signal power of the interference signal；
According to the interfering signal power and default interfering signal power threshold value to the adjustable gain power amplifier
Gain is controlled；
Or,
The data processor is used to judge that the reception signal after the demodulation process includes useful signal and interference signal
When, the useful signal power of the useful signal and the interfering signal power of the interference signal are obtained respectively；
Obtain the difference that the useful signal power subtracts the interfering signal power, and according to the difference to it is described can
The gain of gain power amplifier is adjusted to be controlled.
Further, the data processor according to the interfering signal power and default interfering signal power threshold value to institute
When the gain for stating adjustable gain power amplifier is controlled, the default interfering signal power threshold value is different comprising at least two
The interfering signal power threshold value of size and correspondence different gains grade；The data processor is used for the interference signal work(
Rate is compared with each interfering signal power threshold value, and corresponding gain level is obtained according to comparative result, according to what is obtained
Gain of the gain level to the adjustable gain power amplifier is controlled；
The data processor is according to the difference of the useful signal power and the interfering signal power to described adjustable
When the gain of gain power amplifier is controlled, the preset difference value threshold value is comprising at least two different sizes and corresponds to not
With the difference threshold of gain level；The data processor is used to be compared the difference with each difference threshold, root
Corresponding gain level is obtained according to comparative result, the gain according to the gain level for obtaining to the adjustable gain power amplifier
It is controlled.
Further, the data processor according to the interfering signal power and default interfering signal power threshold value to institute
When the gain for stating adjustable gain power amplifier is controlled, maximum interference letter at least two interfering signal powers threshold value
Number corresponding gain level of power threshold be the gain of the adjustable gain power amplifier is set to 00 grade；
The data processor is according to the difference of the useful signal power and the interfering signal power to described adjustable
When the gain of gain power amplifier is controlled, corresponding gain of minimal difference threshold value etc. at least two difference threshold
Level be the gain of the adjustable gain power amplifier is set to 00 grade.
Further, the data processor is additionally operable to the signal of the transmission signal for obtaining the bluetootho transceiver transmitting
Power；
The data processor is used for the signal power based on the reception signal after the demodulation process to the adjustable increasing
The gain of beneficial power amplifier be controlled including：
With default received power threshold be compared the signal power of the reception signal by the data processor, and will
The signal power of the transmission signal is compared with default transmission power threshold value, according to comparative result to the adjustable gain work(
The gain of rate amplifier is controlled.
Further, the default received power threshold includes at least two different size of received power thresholds, described
Default transmission power threshold value includes at least two different size of transmission power threshold values；
The data processor is used to be compared the signal power of the reception signal with each received power threshold
Compared with, and the signal power of the transmission signal is compared with each transmission power threshold value, obtain right according to comparative result
The gain level answered, the gain according to the gain level for obtaining to the adjustable gain power amplifier is controlled.
Further, the comparative result is the signal power of the reception signal more than or equal to the received power threshold
Middle maximal received power threshold value, and the signal power of the transmission signal is more than or equal to emission maximum in the transmission power threshold value
During power threshold, the gain level of acquisition be the gain of the adjustable gain power amplifier is set to 00 grade.
The present invention also provides a kind of Bluetooth terminal, including terminal body and the electricity of the Bluetooth receptions as described in any one above
Road；
At least a portion of the Bluetooth receptions circuit is arranged in the terminal body.
The present invention also provides a kind of gain control method of the Bluetooth receptions circuit as described in any one above, including：
The antenna obtains the reception signal from Bluetooth communication opposite end；
The adjustable gain power amplifier is sent out after the reception signal is amplified into treatment according to current setting gain
To the bluetootho transceiver；
After the bluetootho transceiver is demodulated treatment to the reception signal from the adjustable gain power amplifier
Issue the data processor；
The data processor is based on the signal power of the reception signal after the demodulation process to the adjustable gain work(
The gain of rate amplifier is controlled.
Further, the data processor be based on the demodulation process after reception signal signal power to it is described can
Adjust gain power amplifier gain be controlled including：
When judging that the reception signal after the demodulation process includes useful signal and interference signal, the interference signal is obtained
Interfering signal power；
According to the interfering signal power and default interfering signal power threshold value to the adjustable gain power amplifier
Gain is controlled；
Or,
When judging that the reception signal after the demodulation process includes useful signal and interference signal, obtain described effective respectively
The useful signal power of signal and the interfering signal power of the interference signal；
Obtain the difference that the useful signal power subtracts the interfering signal power, and according to the difference to it is described can
The gain of gain power amplifier is adjusted to be controlled；
Or,
Obtain the signal power of the transmission signal of the bluetootho transceiver transmitting；
The signal power of signal power and the transmission signal according to the reception signal is to the adjustable gain power
The gain of amplifier is controlled.
Beneficial effect
The present invention provides a kind of Bluetooth terminal, Bluetooth receptions circuit and its gain control method, the Bluetooth receptions circuit
Including：Antenna, adjustable gain power amplifier, bluetootho transceiver and the data processor being sequentially connected, adjustable gain work(
The gain control end of rate amplifier is connected with data processor；Adjustable gain power amplifier is used for the reception letter from antenna
Number be amplified treatment according to current setting gain, bluetootho transceiver be used to process in adjustable gain power amplifier after connect
The collection of letters number is demodulated, and data processor is used for the signal power based on the reception signal after bluetootho transceiver demodulation to adjustable
The gain of gain power amplifier is controlled；The process being adjusted flexibly to gain based on reception signal is realized, so that
It can, for various application scenarios, improve Consumer's Experience to advantageously allow Bluetooth receptions circuit.
Further, the signal power of interference signal of the present invention in signal is received reaches default maximum interference signal
During power threshold, the gain of adjustable gain power amplifier can be set to 0 by data processor, such that it is able to be prevented effectively from field
The signal jam problem that scape A is produced.
Further, the present invention is counted in the Bluetooth RF circuit of local terminal and the Bluetooth RF circuit of opposite end closer to the distance
Can be 0 by the Gain tuning of adjustable gain power amplifier according to processor, so as to can also avoid producing unnecessary electricity
Consumption problem.
Brief description of the drawings
Fig. 1 is the structural representation of Bluetooth RF circuit；
Fig. 2 is a kind of structural representation of Bluetooth receptions circuit that the embodiment of the present invention one is provided；
Fig. 3 is the internal structure schematic diagram of the adjustable gain power amplifier that the embodiment of the present invention one is provided；
Fig. 4 is the structural representation of another Bluetooth receptions circuit that the embodiment of the present invention one is provided；
Fig. 5 is a kind of structural representation of Bluetooth terminal that the embodiment of the present invention one is provided；
Fig. 6 is the structural representation of another Bluetooth terminal that the embodiment of the present invention one is provided；
Fig. 7 is a kind of structural representation of Bluetooth RF circuit that the embodiment of the present invention one is provided；
Fig. 8 is a kind of schematic flow sheet of the gain control method of Bluetooth receptions circuit that the embodiment of the present invention two is provided；
Fig. 9 is a kind of structural representation of terminal that the embodiment of the present invention three is provided.
Specific embodiment
The embodiment of the present invention is described in further detail below by specific embodiment combination accompanying drawing.
Embodiment one：
Fig. 2 is the structural representation of the Bluetooth receptions circuit that the embodiment of the present invention one is provided, the Bluetooth receptions circuit bag
Include：Antenna 21, adjustable gain power amplifier 22, bluetootho transceiver 23 and the data processor 24 being sequentially connected, it is described
The gain control end of adjustable gain power amplifier 22 is connected with the data processor 24, wherein,
The antenna 21 is used to receive the signal sent from outside Bluetooth terminal, namely receives signal, the antenna 21
The reception signal for receiving can be that the Bluetooth connection request signal that sends of outside Bluetooth terminal, connection control signal, connection are tested
Card signal, data transfer signal etc., it should be appreciated that the Bluetooth connection request signal can be outside Bluetooth terminal hair
Send for setting up the signal with local terminal (namely described Bluetooth receptions circuit) communication connection, the connection control signal can be
Outside Bluetooth terminal is used to control the signal of local terminal, for example, obtain after local terminal license directly control local terminal and operated or directly
The data message that can be obtained on local terminal is connect, the connectivity verification signal can be that exterior terminal connects to set up bluetooth with local terminal
Connect, the information of the carrying checking information (such as connectivity verification password) of transmission, the data transfer signal can be outside bluetooth
The data message such as the data message that terminal sends to local terminal, such as picture, music, film, software kit.
After antenna 21 gets reception signal, adjustable gain power amplifier 22 can be by the reception signal from antenna 21
Treatment is amplified according to current gain, it should be noted that current gain should be that data processor 24 is connect based on the last time
The gain that number control of collecting mail is adjusted, it should be appreciated that when electricity on Bluetooth receptions circuit, for example, this is opened by Bluetooth switch
During the Bluetooth function of end, the Bluetooth receptions circuit can also produce an interim initial gain, for it is electric this on when
The reception signal for receiving for the first time is amplified treatment；It is of course also possible to set phase by the Bluetooth receptions circuit
The memory cell answered, for storing the preceding last time of the data processor 24 control adjustment of the last power-off of the Bluetooth receptions circuit
Yield value, on this after electricity, the directly gain according to the storage receives signal to first received after electricity on this
It is amplified treatment.
After adjustable gain power amplifier 22 is amplified treatment according to corresponding gain to the reception signal, it is possible to
Send it to bluetootho transceiver 23.The bluetootho transceiver 23 can be used for from adjustable gain power amplifier 22
Reception signal be demodulated treatment, so as to obtain the reception signal comprising useful signal and/or interference signal, and solution is mediated
Reception signal after reason is sent to data processor 24.
Data processor 24 is used to, based on the reception signal after the demodulation process, obtain the signal work(of the reception signal
Rate, gain of the data processor 24 according to the signal power for receiving signal to adjustable gain power amplifier 22 is controlled
System.Specifically, the gain to adjustable gain power amplifier 22 is controlled including but not limited in the following way：
Mode one：
When data processor 24 is used to judge that the reception signal after the demodulation process includes useful signal and interference signal,
The interfering signal power of the interference signal is obtained, can according to the interfering signal power and default interfering signal power threshold value pair
The gain of gain power amplifier 22 is adjusted to be controlled.Preferably, the default interfering signal power threshold value includes at least two
The interfering signal power threshold value of different size and correspondence different gains grade, refers to table 1：
Table 1
When the interfering signal power is more than or equal to P1, the control adjustable gain of data processor 24 power amplifier 22
Gain is 0；When the interfering signal power is less than P1, and during more than or equal to P2, the control adjustable gain power of data processor 24
The gain of amplifier 22 is 5；When the interfering signal power is less than P2, and during more than or equal to P3, the control of data processor 24 can
The gain for adjusting gain power amplifier 22 is 10.
For example, interfering signal power after data processor 24 judges the demodulation is more than or equal to default maximum interference
During signal power threshold value P1, according to the corresponding gains 0 of the maximum interference signal power threshold value P1 to adjustable gain power amplification
The gain of device 22 is controlled, and that is to say and for the gain multiplication factor of adjustable gain power amplifier 22 to be set to 0, namely docking
Enhanced processing is not made in the collection of letters number, but is transmitted directly to bluetootho transceiver 23 and is demodulated treatment.Avoid adjustable gain power
After 22 pairs, the amplifier relatively high power interference signal is amplified treatment with fixed gain, interfering signal power is set significantly to be carried
Height, causes bluetootho transceiver 23 normally to demodulate the reception signal, signal jam phenomenon occurs, is unfavorable for that user makes
With.Interference signal in the stem grafting collection of letters number is stronger, and when reaching default interfering signal power threshold value accordingly, by setting phase
Rational gain factor is answered, suitably reduces gain factor, it is possible to prevente effectively from there is the situation of signal jam, so as to improve bluetooth
The stability and reliability of receiving circuit.
It should be appreciated that the interfering signal power threshold value is not limited to above-mentioned table 1 with the corresponding relation of gain level
Shown content, can flexibly set according to practical situations or simulation result.For example, interfering signal power threshold value can also
Only setting one, as shown in the table：
Table 2
| Interfering signal power threshold value | Gain level |
| Px | 0 (0 grade) |
Interference letter of the interfering signal power more than or equal to the setting of the table 2 after data processor 24 judges the demodulation
During number power threshold Px, the gain of adjustable gain power amplifier 22 is set to 0 by data processor 24.It should be appreciated that
Interfering signal power threshold value Px of the interfering signal power less than the setting of the table 2 after data processor 24 judges the demodulation
When, now then with set gain (such as 10 times gains) be amplified treatment, that is to say when interfering signal power reach it is default
Interfering signal power threshold value Px when, the gain of adjustable gain power amplifier 22 is set to 0, otherwise its gain is set to
The gain (such as 10 times gains) of setting.
It should be appreciated that when the interfering signal power is smaller, can be entered by adjustable gain power amplifier 22
Row enhanced processing, enables useful signal therein to be amplified well, and because interfering signal power is smaller, will not be to indigo plant
The demodulation process process of tooth transceiver 23 produces influence, therefore is also not in the feelings that cannot normally demodulate useful signal
Condition.Because the electricity expended needed for different grades of gain process process is different, therefore, according to interference signal in this implementation
Watt level correspondence different brackets gain amplification disposal, is ensureing that bluetootho transceiver 23 being capable of the proper efficient solution tune reception
While signal, treatment is amplified with relatively small gain factor such that it is able to realize that farthest reducing bluetooth connects
The power consumption of circuit is received, user experience is improved.For example, with continued reference to table 1, when current interfering signal power is less than P2, and greatly
When equal to P3, now data processor 24 can will according to the corresponding gain level of the default interfering signal power threshold value
The gain of adjustable gain power amplifier 22 is set to 10, now has been able to ensure that bluetootho transceiver 23 can be solved well
The reception signal is adjusted, then now the gain of adjustable gain power amplifier 22 need not be set to the yield value higher than 10,
20 are for example set to, so only can increase the unnecessary electric quantity consumption of Bluetooth receptions circuit.
Mode two：
When data processor 24 is used to judge that the reception signal after the demodulation process includes useful signal and interference signal,
The useful signal power of the useful signal and the interfering signal power of the interference signal are obtained respectively, obtain effective letter
Number power subtracts the difference of the interfering signal power, and the increasing according to the difference to the adjustable gain power amplifier 22
Benefit is controlled.
It should be noted that the data processor 24 subtracts the interfering signal power according to the useful signal power
Gain of the difference to the adjustable gain power amplifier 22 when being controlled, it is preferred that the preset difference value threshold value is included
The difference threshold of at least two different sizes and correspondence different gains grade, refers to table 3：
Table 3
Data processor 24 is used to be compared the difference with each preset difference value threshold value, is obtained according to comparative result
Corresponding gain level is taken, the gain according to the gain level for obtaining to the adjustable gain power amplifier 22 is controlled.
For example, when the difference that useful signal power subtracts interfering signal power is less than or equal to preset difference value threshold X 1, number
According to processor 24 according to the corresponding gain level of preset difference value threshold X 1 (gain is 0) by the increasing of adjustable gain power amplifier 22
Benefit is set as 0；When the difference is more than X1, and during less than or equal to X2, data processor 24 is by adjustable gain power amplifier 22
Gain be set as 8；When the difference is more than X2, and during less than or equal to X3, data processor 24 is by adjustable gain power amplification
The gain of device 22 is set as 16.
When the difference for subtracting interfering signal power in useful signal power is less than or equal to preset difference value threshold X 1, that is to say dry
Signal power is disturbed larger, when being more or less the same even equal compared with useful signal power, if now or with a certain fixed gain
After (such as 10 times gains) is amplified treatment, make interfering signal power bigger, by the demodulation process of bluetootho transceiver 23
When, it is easy to there is situation about cannot normally demodulate, and in the present embodiment, adjustable gain power is controlled by data processor 24
The gain of amplifier 22, now can be set to 0 by the gain of adjustable gain power amplifier 22, namely does not dock the collection of letters and number enter
Row enhanced processing, it is to avoid make interference signal be further strengthened, mediates such that it is able to effectively reduce the solution of bluetootho transceiver 23
Reason receives the signal jam phenomenon occurred during signal.Meanwhile, it also avoid being led due to being amplified treatment with fixed gain all the time
The unnecessary electric quantity consumption problem for causing, according to useful signal power and the difference of interfering signal power, to adjustable gain power
The gain of amplifier 22 rationally flexibly set, and the electric quantity consumption of Bluetooth receptions circuit is reduced to greatest extent.
It should be appreciated that the preset difference value threshold value is not limited to shown in above-mentioned table 3 with the corresponding relation of gain level
Content, can flexibly set according to practical situations or simulation result.
Mode three：
Data processor 24 can be also used for the signal power of the transmission signal for obtaining the transmitting of bluetootho transceiver 23, then
Gain of the signal power of signal power and transmission signal according to the reception signal to adjustable gain power amplifier 22 is entered
Row control.It should be appreciated that the signal power that data processor 24 obtains transmission signal can obtain the letter of reception signal
Obtained before number power, it is also possible to obtain after or simultaneously.
According to received signal power and default received signal power threshold value, transmission signal power and default transmission signal power
Gain of the threshold value to adjustable gain power amplifier 22 is controlled；The default received power threshold includes that at least two is different
The received power threshold of size, the default transmission power threshold value includes at least two different size of transmission power threshold values, is
The present invention is better understood from, table 4 is referred to：
Table 4
It should be noted that table 4 is illustrated as just one kind of the present embodiment, specifically according to the interference signal
Power and useful signal power determine the gain of adjustable gain power amplifier 22, however it is not limited to content shown in above-mentioned table 1, can be with
Flexibly set according to practical situations or simulation result.It should be appreciated that to the adjustable gain power amplifier 22
Gain when being controlled adjustment, including but not limited to using aforesaid way 1,2,3, when using two kinds therein or three simultaneously
When kind is used, it is understood that there may be the different situation of the final gain for determining, at this point it is possible to determined in a certain mode therein
Gain is defined, and flexibly sets the priority of this several ways.Preferably, the priority of mode 1 and mode 2 is excellent higher than mode 3
First level.For example, when employing mode 1 simultaneously and during mode 3, now can be preferential higher than mode 3 with the priority of setting means 1
Level, when the gain that both determine is different, then the gain that the gain for being determined in mode 1 finally determines as this.Such as mode 1
The gain of determination be 20, and mode 3 determine gain be 10 when, now, the gain that data processor 24 then draws according to mode 1
20 gain to control adjustable gain power amplifier 22 is 20.
In order to be better understood from the present invention, Fig. 3 is referred to, Fig. 3 is the adjustable gain power that the embodiment of the present invention one is provided
The internal structure schematic diagram of amplifier 22.Including gain control end interface unit 221 and power amplification unit 222, the increasing
Beneficial control end interface unit 221 is used to be attached with data processor 24, the gain control that reception is sent by data processor 24
System adjustment signal, so as to realize being controlled adjustment to the gain of power amplification circuit 222.The power amplification unit 222 is wrapped
Switched containing multistage gain and Bypass, for example, ought receive the transmission of data processor 24 is 0 gain control by Gain tuning
During adjustment signal, switched by closing Bypass, make adjustable gain power amplifier 22 be operated in Bypass patterns, i.e. gain to be
Zero；When corresponding gain control adjustment signal is received, Bypass switches are disconnected, by using the wherein one-level of multistage gain
Or the enhanced processing of multi-level different amplification.
Specifically, when such as local terminal Bluetooth RF circuit is distant with opposite end Bluetooth RF circuit, received signal power
Generally smaller, it is high stage gain that data processor 24 can control the gain of adjustable gain power amplifier 22, is improved sensitive
Degree, it is ensured that normal communication connection.When both sides are closer to the distance, received signal power is generally large, and data processor 24 can be with
It is low stage gain even 0 grade (gain is 0) to control the gain of adjustable gain power amplifier 22, to reduce Bluetooth receptions electricity
The power consumption on road.Or when data processor 24 judges that interfering signal power is larger or useful signal power subtracts interference signal work(
The difference of rate is smaller, when reaching default corresponding interfering signal power threshold value, the gain of control adjustable gain power amplifier 22
It is 0 grade, it is to avoid amplification of the adjustable gain power amplifier 22 to interference signal, it is ensured that bluetootho transceiver 23 is to useful signal
Normal demodulation, prevent signal jam problem.
It should be appreciated that may be used also between the antenna 21 and adjustable gain power amplifier 22 of the Bluetooth receptions circuit
To set a receiving filter 25, Fig. 4 is referred to, the receiving filter 25 is used for the reception letter to being received from antenna 21
Number treatment is filtered, filters part interference signal therein, so as to the amplification demodulation process process for being conducive to docking to collect mail number.
Bluetooth receptions circuit provided in an embodiment of the present invention can apply on Bluetooth terminal, refer to Fig. 5, the bluetooth
Terminal includes the Bluetooth receptions circuit 52 described in terminal body 51 and the present embodiment, and wherein Bluetooth receptions circuit 52 can all set
It is placed in terminal body 51, it is also possible to which the partial circuit of Bluetooth receptions circuit 52 is arranged in terminal body 51, for example can be with
The antenna of Bluetooth receptions circuit 52 is arranged on outside terminal body 51.
It will be appreciated by those skilled in the art that, the terminal body 51 can also include processor, interface circuit, deposit
Reservoir, power management chip, can also include Bluetooth transmission circuit certainly, so as to electric with Bluetooth receptions circuit composition Bluetooth RF
Road.Fig. 6 is referred to, Fig. 6 is the structural representation of another Bluetooth terminal that the embodiment of the present invention one is provided.Wherein, processor
Can be used for communication and the gain control process of Bluetooth RF circuit, power management chip provides power supply, deposits for each corresponding device
Reservoir be used for Bluetooth terminal needed for various data messages, and coordinate the scheduling of each hardware resource, interface circuit is used to realize
Bluetooth terminal realize with external equipment carry out it is corresponding communicate to connect, data transfer, the process such as supply of electric power.
In order to be better understood from the present invention, the Bluetooth RF circuit on the Bluetooth terminal may refer to Fig. 7, including such as
Bluetooth receptions circuit and Bluetooth transmission circuit shown in Fig. 4.Wherein, Bluetooth transmission circuit also includes emission filter 26 and work(
Rate amplifier 27.
The embodiment of the present invention provides a kind of Bluetooth receptions circuit and the Bluetooth terminal comprising the Bluetooth receptions circuit, described
Bluetooth receptions circuit includes：Antenna 21, receiving filter 25, the transmitting-receiving of adjustable gain power amplifier 22, bluetooth being sequentially connected
Letter machine 23 and data processor 24, the gain control end of adjustable gain power amplifier 22 are connected with data processor 24；My god
Line 21 is used to receive the reception signal from outside Bluetooth terminal, and receiving filter 25 is used for the reception signal from antenna 21
Adjustable gain power amplifier 22 is sent to after being filtered treatment, the adjustable gain power amplifier 22 is used at filtering
Reception signal after reason is amplified treatment according to current setting gain, and bluetootho transceiver 23 is used to put adjustable gain power
Reception signal after big device 22 is processed is demodulated, the reception that data processor 24 is used for after being demodulated based on bluetootho transceiver 23
Increasing of the signal power of the signal power of signal and/or the transmission signal of Bluetooth receptions circuit to adjustable gain power amplifier 22
Benefit is controlled；Realizing carries out flexibly appropriate setting up procedure to gain amplifier, improves the demodulation of bluetootho transceiver 23
Effect, solves the signal jam that is produced when being amplified by the external LNA of fixed gain or unnecessary electricity disappears
Consumption problem, so as to ensure that the data transmission performance and stability of Bluetooth receptions circuit, improves user experience.
Embodiment two：
The embodiment of the present invention provides a kind of gain control method of Bluetooth receptions circuit as described in embodiment one, refers to
Fig. 8, the gain control method includes following flow：
S81：Antenna obtains the reception signal from Bluetooth communication opposite end；
S82：Adjustable gain power amplifier is sent out after the reception signal is amplified into treatment according to current setting gain
To the bluetootho transceiver；
S83：After bluetootho transceiver is demodulated treatment to the reception signal from the adjustable gain power amplifier
Issue the data processor；
S84：Data processor is based on the signal power of the reception signal after the demodulation process to the adjustable gain work(
The gain of rate amplifier is controlled.
The data processor is based on the signal power of the reception signal after the demodulation process to the adjustable gain work(
The gain of rate amplifier be controlled including：Judge that the reception signal after the demodulation process includes useful signal and interference signal
When, obtain the interfering signal power of the interference signal；According to the interfering signal power and default interfering signal power threshold value
Gain to the adjustable gain power amplifier is controlled；Or judge that the reception signal after the demodulation process is included
During effect signal and interference signal, the useful signal power of the useful signal and the interference signal of the interference signal are obtained respectively
Power；The difference that the useful signal power subtracts the interfering signal power is obtained, and according to the difference to described adjustable
The gain of gain power amplifier is controlled；Or obtain the signal work(of the transmission signal of the bluetootho transceiver transmitting
Rate；The signal power of signal power and the transmission signal according to the reception signal is to the adjustable gain power amplifier
Gain be controlled.
The signal power for obtaining transmission signal can be obtained before the signal power for receiving signal is obtained, it is also possible to
Obtain after or simultaneously.When above-mentioned several ways control the gain of adjustable gain power amplifier, it is preferred that can pass through
Interfering signal power or useful signal power subtract the difference of interfering signal power to control adjustable gain power amplifier
Gain.For example it is compared with default interfering signal power threshold value by interfering signal power, the interfering signal power threshold value
Interfering signal power threshold value comprising at least two different sizes and correspondence different gains grade, data processor will be described dry
Disturb signal power to be compared with each interfering signal power threshold value, corresponding gain level, Ran Hougen are obtained according to comparative result
Gain according to the gain level for obtaining to adjustable gain power amplifier is controlled.Or subtracted by useful signal power dry
The difference and preset difference value threshold value for disturbing signal power are compared, preset difference value threshold value can comprising at least two different sizes,
And the difference threshold of correspondence different gains grade；With each difference threshold be compared the difference by data processor, according to than
Relatively result obtains corresponding gain level, and the then gain further according to the gain level for obtaining to adjustable gain power amplifier is entered
Row control.
It should be appreciated that the default interfering signal power threshold value, preset difference value threshold value and increasing corresponding thereto
Beneficial grade can flexibly set according to practical situations or simulation result, and data processor is according to the interference signal work(for obtaining
Rate effectively consumes the difference that power subtracts interfering signal power, with default interfering signal power threshold value or difference threshold
And gain level corresponding relation corresponding thereto is compared, and corresponding gain level, root are obtained according to comparative result
Gain according to the gain level for obtaining to the adjustable gain power amplifier is controlled.
In the present embodiment, gain of the data processor to adjustable gain power amplifier is controlled can also be by obtaining
The signal power of the transmission signal of bluetootho transceiver transmitting, and the signal power for receiving signal is combined to the adjustable gain work(
The gain of rate amplifier is controlled.
It should be noted that the gain of data processor controlled adjustable gain power amplifier can combine aforesaid way
Use, the difference of interfering signal power is preferably subtracted by interfering signal power or useful signal power to control the side of gain
Formula, when also needing to combine by way of received signal power, transmission signal power control gain, can set priority, keep away
Exempt from several ways simultaneously using when gain level occur different, it is impossible to it is determined that specifically which kind of gain level to control adjustable gain with
The gain of power amplifier.
The embodiment of the present invention provides a kind of gain control method of Bluetooth receptions circuit, obtains logical from bluetooth by antenna
Believe the reception signal of opposite end；The reception signal is amplified treatment by adjustable gain power amplifier according to current setting gain
After issue the bluetootho transceiver；Bluetootho transceiver is carried out to the reception signal from the adjustable gain power amplifier
The data processor is issued after demodulation process；Data processor is based on the signal power of the reception signal after the demodulation process
And/or gain of the signal power of the transmission signal of Bluetooth receptions circuit to the adjustable gain power amplifier is controlled.
Realizing carries out flexibly appropriate setting up procedure to gain amplifier, improves the demodulation effect of bluetootho transceiver, solves logical
Signal jam or unnecessary electric quantity consumption problem that the external LNA for crossing fixed gain is produced when being amplified, so as to protect
The data transmission performance and stability of Bluetooth receptions circuit have been demonstrate,proved, user experience has been improve.
Embodiment three：
Fig. 9 is the structural representation of the terminal that the embodiment of the present invention three is provided, as shown in figure 9, terminal 9 includes：At least one
Individual processor 91 and storage device 92.Wherein,
Processor 91 can be general processor, and such as central processing unit can also be digital signal processor, or
It is configured to implement one or more integrated circuits of the embodiment of the present invention.Storage device 92 include nonvolatile memory, easily
The property lost memory, flash memory, hard disk and solid state hard disc.
The internal memory of storage device 92 contains multiple instruction to realize the gain control method of Bluetooth receptions circuit of the present invention.Treatment
Device 91 performs multiple instruction and realizes following operation：
The control antenna of processor 91 obtains the reception signal from Bluetooth communication opposite end；Adjustable gain power amplifier is by institute
State after reception signal is amplified treatment according to current setting gain and issue the bluetootho transceiver；Control bluetootho transceiver
The data processor is issued after treatment is demodulated to the reception signal from the adjustable gain power amplifier；Control number
Gain of the signal power of the reception signal after the demodulation process to the adjustable gain power amplifier is based on according to processor
It is controlled.
The processor 91 can be also used for control data processor and judge that the reception signal after the demodulation process includes
When useful signal and interference signal, the interfering signal power of the interference signal is obtained；According to the interfering signal power and in advance
If gain of the interfering signal power threshold value to the adjustable gain power amplifier is controlled；Or control data processor is sentenced
When reception signal after the demodulation process of breaking includes useful signal and interference signal, the effective of the useful signal is obtained respectively
The interfering signal power of signal power and the interference signal；Obtain the useful signal power and subtract the interfering signal power
Difference, and gain according to the difference to the adjustable gain power amplifier is controlled.
The processor 91 can be also used for the transmitting letter that control data processor obtains the bluetootho transceiver transmitting
Number signal power；The signal power of signal power and the transmission signal according to the reception signal is to the adjustable gain
The gain of power amplifier is controlled.
Preferably, the control data processor of processor 91 obtains interfering signal power or useful signal power subtracts interference
The difference of signal power controls the gain of adjustable gain power amplifier.
When the control data processor of processor 91 controls the gain of adjustable gain power amplifier using various ways,
Processor 91 can also set the priority of wherein this several gain control mode, true when being occurred using various gain control modes
When fixed gain level is different, this adjustable gain is controlled with the gain level of the gain control mode determination of highest priority
The gain of power amplifier.
The embodiment of the present invention provides a kind of terminal 9, and the terminal 9 includes at least one processor 9 and storage device
92, the wherein internal memory of storage device 92 contains multiple instruction to realize the gain control method of Bluetooth receptions circuit of the present invention, treatment
Device 91 obtains the reception signal from Bluetooth communication opposite end according to the instruction control antenna；Adjustable gain power amplifier is by institute
State after reception signal is amplified treatment according to current setting gain and issue the bluetootho transceiver；Control bluetootho transceiver
The data processor is issued after treatment is demodulated to the reception signal from the adjustable gain power amplifier；Control number
The letter of the transmission signal of the signal power and/or Bluetooth receptions circuit of the reception signal after the demodulation process is based on according to processor
Number gain of the power to the adjustable gain power amplifier is controlled.Realizing docking collection of letters gain amplifier is carried out flexibly
Appropriate setting up procedure, improves the demodulation effect of bluetootho transceiver, solves and is put into by the external low noise of fixed gain
Signal jam or unnecessary electric quantity consumption problem that row is produced when amplifying, so as to the data that ensure that Bluetooth receptions circuit are passed
Defeated performance and stability, improve user experience.
Above content is to combine specific embodiment further description made for the present invention, it is impossible to assert this hair
Bright specific implementation is confined to these explanations.For general technical staff of the technical field of the invention, do not taking off
On the premise of present inventive concept, some simple deduction or replace can also be made, should all be considered as belonging to protection of the invention
Scope.
Claims (10)
1. a kind of Bluetooth receptions circuit, it is characterised in that including：Antenna, adjustable gain power amplifier, the bluetooth being sequentially connected
Transceiver and data processor, gain control end and the data processor of the adjustable gain power amplifier connect
Connect；
The adjustable gain power amplifier is used to be put the reception signal from the antenna according to current setting gain
The bluetootho transceiver is issued after big treatment；
After the bluetootho transceiver is used to be demodulated treatment to the reception signal from the adjustable gain power amplifier
Issue the data processor；
The data processor is used for the signal power based on the reception signal after the demodulation process to the adjustable gain work(
The gain of rate amplifier is controlled.
2. Bluetooth receptions circuit as claimed in claim 1, it is characterised in that the data processor is used to be based on the demodulation
Gain of the signal power of the reception signal after treatment to the adjustable gain power amplifier be controlled including：
When the data processor is used to judge that the reception signal after the demodulation process includes useful signal and interference signal, obtain
Take the interfering signal power of the interference signal；
Gain according to the interfering signal power and default interfering signal power threshold value to the adjustable gain power amplifier
It is controlled；
Or,
When the data processor is used to judge that the reception signal after the demodulation process includes useful signal and interference signal, point
The useful signal power of the useful signal and the interfering signal power of the interference signal are not obtained；
The difference that the useful signal power subtracts the interfering signal power is obtained, and according to the difference to the adjustable increasing
The gain of beneficial power amplifier is controlled.
3. Bluetooth receptions circuit as claimed in claim 2, it is characterised in that the data processor is according to the interference signal
It is described default dry when the gain of power and default interfering signal power threshold value to the adjustable gain power amplifier is controlled
Signal power threshold value is disturbed including at least two sizes and the interfering signal power threshold value of correspondence different gains grade；The data
Processor is used to be compared the interfering signal power with each interfering signal power threshold value, is obtained according to comparative result
Corresponding gain level, the gain according to the gain level for obtaining to the adjustable gain power amplifier is controlled；
The data processor is according to the difference of the useful signal power and the interfering signal power to the adjustable gain
When the gain of power amplifier is controlled, the preset difference value threshold value includes at least two different sizes and the different increasings of correspondence
The difference threshold of beneficial grade；The data processor be used for the difference is compared with each difference threshold, according to than
Relatively result obtains corresponding gain level, and the gain according to the gain level for obtaining to the adjustable gain power amplifier is carried out
Control.
4. Bluetooth receptions circuit as claimed in claim 3, it is characterised in that the data processor is according to the interference signal
When the gain of power and default interfering signal power threshold value to the adjustable gain power amplifier is controlled, described at least two
The corresponding gain level of maximum interference signal power threshold value is to put the adjustable gain power in individual interfering signal power threshold value
The gain of big device is set to 00 grade；
The data processor is according to the difference of the useful signal power and the interfering signal power to the adjustable gain
When the gain of power amplifier is controlled, the corresponding gain level of minimal difference threshold value is at least two difference threshold
The gain of the adjustable gain power amplifier is set to 00 grade.
5. Bluetooth receptions circuit as claimed in claim 1, it is characterised in that the data processor is additionally operable to obtain the indigo plant
The signal power of the transmission signal of tooth transceiver transmitting；
The data processor is used for the signal power based on the reception signal after the demodulation process to the adjustable gain work(
The gain of rate amplifier be controlled including：
With default received power threshold be compared the signal power of the reception signal by the data processor, and will be described
The signal power of transmission signal is compared with default transmission power threshold value, and the adjustable gain power is put according to comparative result
The gain of big device is controlled.
6. Bluetooth receptions circuit as claimed in claim 5, it is characterised in that the default received power threshold includes at least two
Individual different size of received power threshold, the default transmission power threshold value includes at least two different size of transmission power thresholds
Value；
The data processor is used to be compared the signal power of the reception signal with each received power threshold, and
The signal power of the transmission signal is compared with each transmission power threshold value, corresponding increasing is obtained according to comparative result
Beneficial grade, the gain according to the gain level for obtaining to the adjustable gain power amplifier is controlled.
7. Bluetooth receptions circuit as claimed in claim 6, it is characterised in that the comparative result is the letter of the reception signal
Number power is more than more than or equal to maximal received power threshold value in the received power threshold, and the signal power of the transmission signal
Equal to during maximum transmission power threshold value, the gain level of acquisition is to put the adjustable gain power in the transmission power threshold value
The gain of big device is set to 00 grade.
8. a kind of Bluetooth terminal, it is characterised in that the bluetooth including terminal body and as described in claim any one of 1-7 connects
Receive circuit；
At least a portion of the Bluetooth receptions circuit is arranged in the terminal body.
9. a kind of gain control method of Bluetooth receptions circuit as described in claim any one of 1-7, it is characterised in that bag
Include：
The antenna obtains the reception signal from Bluetooth communication opposite end；
The adjustable gain power amplifier issues institute after the reception signal is amplified into treatment according to current setting gain
State bluetootho transceiver；
The bluetootho transceiver is issued after treatment is demodulated to the reception signal from the adjustable gain power amplifier
The data processor；
The signal power that the data processor is based on the reception signal after the demodulation process is put to the adjustable gain power
The gain of big device is controlled.
10. the gain control method of Bluetooth receptions circuit as claimed in claim 9, it is characterised in that the data processor
Gain of the signal power based on the reception signal after the demodulation process to the adjustable gain power amplifier is controlled
Including：
When judging that the reception signal after the demodulation process includes useful signal and interference signal, the dry of the interference signal is obtained
Disturb signal power；
Gain according to the interfering signal power and default interfering signal power threshold value to the adjustable gain power amplifier
It is controlled；
Or,
When judging that the reception signal after the demodulation process includes useful signal and interference signal, the useful signal is obtained respectively
Useful signal power and the interference signal interfering signal power；
The difference that the useful signal power subtracts the interfering signal power is obtained, and according to the difference to the adjustable increasing
The gain of beneficial power amplifier is controlled；
Or,
Obtain the signal power of the transmission signal of the bluetootho transceiver transmitting；
The signal power of signal power and the transmission signal according to the reception signal is to the adjustable gain power amplification
The gain of device is controlled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611187135.9A CN106712812A (en) | 2016-12-20 | 2016-12-20 | Bluetooth terminal, and Bluetooth receiving circuit and gain control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611187135.9A CN106712812A (en) | 2016-12-20 | 2016-12-20 | Bluetooth terminal, and Bluetooth receiving circuit and gain control method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106712812A true CN106712812A (en) | 2017-05-24 |
Family
ID=58938191
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611187135.9A Pending CN106712812A (en) | 2016-12-20 | 2016-12-20 | Bluetooth terminal, and Bluetooth receiving circuit and gain control method thereof |
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| Country | Link |
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| CN (1) | CN106712812A (en) |
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| WO2020118497A1 (en) * | 2018-12-10 | 2020-06-18 | 深圳市欢太科技有限公司 | Method and apparatus for adjusting wi-fi gain, electronic device, and storage medium |
| CN113067597A (en) * | 2021-03-22 | 2021-07-02 | 维沃移动通信有限公司 | Link processing method and device, electronic equipment and storage medium |
| CN114071441A (en) * | 2022-01-14 | 2022-02-18 | 高拓讯达（北京）科技有限公司 | Bluetooth signal processing method and device |
| CN114143660A (en) * | 2022-01-06 | 2022-03-04 | 维沃移动通信有限公司 | Wireless earphone control method and device and electronic equipment |
| CN115276681A (en) * | 2022-07-27 | 2022-11-01 | 东集技术股份有限公司 | RFID reader-writer system, transmission power closed-loop control method and main controller |
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Application publication date: 20170524 |