CN105227207A - Radio-frequency (RF) transceiver and signal strength detection processing method thereof - Google Patents
Radio-frequency (RF) transceiver and signal strength detection processing method thereof Download PDFInfo
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- CN105227207A CN105227207A CN201510673747.8A CN201510673747A CN105227207A CN 105227207 A CN105227207 A CN 105227207A CN 201510673747 A CN201510673747 A CN 201510673747A CN 105227207 A CN105227207 A CN 105227207A
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Abstract
The invention discloses a kind of radio-frequency (RF) transceiver and signal strength detection processing method thereof, this radio-frequency (RF) transceiver comprises receiving path and transmitting path, also comprise RSSI detection module and logic processing module, this RSSI detection module is according to system specific requirement, realize different detection power scopes and intensity, comprise transmitting path RSSI detection module and receiving path RSSI detection module, connect this transmitting path and receiving path respectively, to carry out independently signal strength detection respectively to this transmitting path and receiving path, the output of this transmitting path RSSI detection module and receiving path RSSI detection module all exports logic processing module to, logic processing module is used for carrying out logical process to the signal strength signal intensity that this RSSI detection module detects, obtains the instruction of different state, to judge the mode of operation of system, signal power and interference strength, thus feeds back to base band and carries out controlling or processing.
Description
Technical field
The present invention relates to radio frequency and field of analog integrated circuit, particularly relate to a kind of RSSI for radio-frequency (RF) transceiver (ReceivedSignalStrengthIndication, the signal strength signal intensity instruction of reception) to detect and the radio-frequency (RF) transceiver of logical process and signal strength detection processing method thereof.
Background technology
Radio-frequency (RF) transceiver is the chief component of modern various wired and radio communication, is widely used at various communication situation.RSSI is the common module in radio-frequency (RF) transceiver, for detecting input signal power intensity.Conventional structure is made up of multistage limiting amplifier, rectifier and low pass filter, its principle is by limiting amplifier progressively amplification input signal, the signal power that the gain of amplifier and progression determine process is strong and weak, rectifier carries out rectification to the output signal of every grade of amplifier, the output current of multi-stage rectifying device is added to and resistance obtains commutating voltage exports, by obtaining signal strength signal intensity instructed voltage after low-pass filtering filtering high fdrequency component.
In traditional transceiver, the effect of RSSI is mainly used in the gain regulating each module in transceiver, to realize the maximization of transceiver dynamic range.Usually in conjunction with variable gain radio frequency or intermediate frequency amplifier, even variable gain mixer realizes.Concrete grammar is, after RSSI detects input signal power, can export a signal strength signal intensity instructed voltage, then using the input of this voltage as variable gain amplifier.When signal strength signal intensity height, variable-gain amplifier gain is established low; When signal strength signal intensity is low, variable-gain amplifier gain is established height.This control can adopt the way of simulation or numeral, when adopting the method for simulation, controls variable gain amplifier, obtain continuous print change in gain by signal strength signal intensity instructed voltage direct (or analog converting); When adopting the method for numeral, signal strength signal intensity instructed voltage first obtains discrete digital controlled signal by comparator or analog to digital converter (ADC), then digital controlled signal regulates the gain of variable gain amplifier thus.
But in traditional radio-frequency (RF) transceiver, because transmitting path signal comes from controlled baseband chip, signal amplitude can regulate separately, therefore usually do not need detection signal power in transmitting path.
Summary of the invention
For overcoming the deficiency that above-mentioned prior art exists, the object of the present invention is to provide a kind of radio-frequency (RF) transceiver and signal strength detection processing method thereof, it is by being expanded existing RSSI detection and gain control function, respectively signal strength detection is carried out to reception and transmitting chain, by judging to receive, the Real-time intensity of signal on transmitting chain, independently received, transmit signal strength instructed voltage, then by these two instructed voltage by certain Digital Logic process, different state instructions can be obtained, to judge the mode of operation of system, signal power and interference strength, thus feed back to base band and carry out controlling or processing.
For reaching above-mentioned and other object, the present invention proposes a kind of radio-frequency (RF) transceiver, comprise receiving path and transmitting path, this radio-frequency (RF) transceiver also comprises RSSI detection module and logic processing module, this RSSI detection module is according to system specific requirement, realize different detection power scopes and intensity, comprise transmitting path RSSI detection module and receiving path RSSI detection module, connect this transmitting path and receiving path respectively, to carry out independently signal strength detection respectively to this transmitting path and receiving path, the output of this transmitting path RSSI detection module and receiving path RSSI detection module all exports logic processing module to, logic processing module is used for carrying out logical process to the signal strength signal intensity that this RSSI detection module detects, obtains the instruction of different state, to judge the mode of operation of system, signal power and interference strength, thus feeds back to base band and carries out controlling or processing.
Further, this transmitting path RSSI detection module is identical with receiving path RSSI detection module structure, all at least comprise multiple limiting amplifier, multiple rectifier, a low pass filter, each limiting amplifier is connected to receiving path or transmitting path after connecting successively, each rectifier connects the output of each limiting amplifier respectively, the output of each rectifier delivers to this low pass filter after suing for peace, and carries out output detections result after low-pass filtering through this low pass filter.
Further, this RSSI detection module also comprises a comparator, this low pass filter of input termination of this comparator and a reference voltage, output output detections result.
Further, the reference voltage level of this comparator input terminal is regulated according to detected amplitude.
Further, this transmitting path RSSI detection module for detecting transmitting path signal strength signal intensity, before the up-conversion mixer that its test point can be arranged in this transmitting path or the arbitrary node of transmitting path.
Further, this receiving path RSSI detection module for detecting receiving path signal strength signal intensity, after the down-conversion mixer that its test point can be arranged in this receiving path or the arbitrary node of receiving path.
Further, the limiting amplifier in this RSSI detection module and rectifier progression are determined by the dynamic range detected and precision.
For achieving the above object, the present invention also provides a kind of signal strength detection processing method of radio-frequency (RF) transceiver, comprises the steps:
Step one, arranges transmitting path RSSI detection module and receiving path RSSI detection module respectively in the transmitting path and receiving path of this radio-frequency (RF) transceiver, to carry out independently signal strength detection respectively to transmitting path and receiving path;
Step 2, logic processing module carries out logical process to the signal strength signal intensity that each RSSI detection module detects, obtains the instruction of different state, to judge the mode of operation of system, signal power and interference strength, thus feeds back to base band and carries out controlling or processing.
Further, the structure of this transmitting path RSSI detection module and receiving path RSSI detection module is identical, all at least comprise multiple limiting amplifier, multiple rectifier and a low pass filter, each limiting amplifier is connected to receiving path or transmitting path after connecting successively, each rectifier connects the output of each limiting amplifier respectively, the output of each rectifier delivers to this low pass filter after suing for peace, and carries out output signal strength testing result after low-pass filtering through this low pass filter.
Further, in step 2, according to the signal strength signal intensity detected, logic processing module judges that system operating mode is in reception or emission state, signal power whether reaches expectation strength and whether interference signal is larger, and according to above judged result, feed back to the following result of baseband system:
During no signal, additional modules can be closed to save power consumption; When having signal, judge signal strength signal intensity, to determine gain control strategies; When having interference, judge interference strength, with adjustment System frequency and Filter specification, optimize frequency spectrum degree of purity.
Compared with prior art, a kind of radio-frequency (RF) transceiver of the present invention and signal strength detection processing method thereof are by being expanded existing RSSI detection and gain control function, respectively signal strength detection is carried out to reception and transmitting chain, by judging to receive, the Real-time intensity of signal on transmitting chain, independently received, transmit signal strength instructed voltage, then by these two instructed voltage by certain Digital Logic process, different state instructions can be obtained, to judge the mode of operation of system, signal power and interference strength, thus feed back to base band and carry out controlling or processing.
Accompanying drawing explanation
Fig. 1 is the system construction drawing of a kind of radio-frequency (RF) transceiver of the present invention;
Fig. 2 is the structural representation of RSSI detection module in present pre-ferred embodiments;
Fig. 3 is the flow chart of steps of the signal strength detection processing method of a kind of radio-frequency (RF) transceiver of the present invention.
Embodiment
Below by way of specific instantiation and accompanying drawings embodiments of the present invention, those skilled in the art can understand other advantage of the present invention and effect easily by content disclosed in the present specification.The present invention is also implemented by other different instantiation or is applied, and the every details in this specification also can based on different viewpoints and application, carries out various modification and change not deviating under spirit of the present invention.
Fig. 1 is the system construction drawing of a kind of radio-frequency (RF) transceiver of the present invention.As shown in Figure 1, a kind of radio-frequency (RF) transceiver of the present invention, comprising: receiving path 10, transmitting path 20, RSSI detection module 30 and logic processing module 40.
Wherein, receiving path 10 comprises one or more radio frequency low-noise amplifier (LNA), down-conversion mixer (DownMixer), a filter (Filter) and an one or more intermediate frequency amplifier (IFVGA) or buffer (Buffer), and the modules in receiving path can be all fixed gain or adjustable gain, transmission path 20 comprises intermediate frequency amplifier (IFVGA), up-conversion mixer (UpMixer), one or more radio frequency amplifier (RFVGA) and a power amplifier (PA), and the modules in transmitting path can be all fixed gain or adjustable gain, RSSI detection module 30 is according to system specific requirement, realize different detection power scopes and intensity, it comprises transmitting path RSSI detection module 301 and receiving path RSSI detection module 302, connect transmitting path 20 and receiving path 10 respectively, to carry out independently signal strength detection respectively to transmitting path and receiving path, transmitting path RSSI detection module 301 all exports logic processing module 40 to the output of receiving path RSSI detection module 302, receiving path RSSI detection module 302 is for detecting receiving path signal strength signal intensity, the down-conversion mixer (DownMixer) that test point can be arranged in receiving path 10 below or the arbitrary node of receiving path, transmitting path RSSI detection module 301 is for detecting transmitting path signal strength signal intensity, the up-conversion mixer (UpMixer) that test point can be arranged in transmitting path above or the arbitrary node of transmitting path, logic processing module 40 comprises multiple gate and buffer, its specific implementation can need to be configured according to embody rule, its signal strength signal intensity be mainly used in RSSI detection module 30 detects carries out logical process, obtain different state instructions, to judge the mode of operation of system, signal power and interference strength, thus feed back to base band and carry out controlling or processing.Certainly, finish the work better for ease of system, the radio-frequency (RF) transceiver of the present invention also comprises phase-locked loop frequency integrator (PLL), band gap reference (Bandgap), serial control interface (SPI) etc., and these are conventional design, do not repeat them here.
Fig. 2 is the structural representation of RSSI detection module in present pre-ferred embodiments.As shown in Figure 2, in the present invention, transmitting path RSSI detection module 301 in RSSI detection module and the structure of receiving path RSSI detection module 302 identical, all comprise as follows: multiple limiting amplifier (Limitter), multiple rectifier (Rectify), a low pass filter (LPF) and a comparator (Comparator), each limiting amplifier is connected to receiving path or transmitting path after connecting successively, each rectifier connects the output of each limiting amplifier respectively, the output of each rectifier delivers to low pass filter after suing for peace, carry out delivering to comparator after low-pass filtering through low pass filter, output detections result after itself and reference voltage Vref compare and process by comparator, in the present invention, limiting amplifier in RSSI detection module and rectifier progression are determined by the dynamic range detected and precision, the reference voltage level Vref of comparator can be regulated according to detected amplitude.
The present invention is in the receiving path and transmitting path of radio-frequency (RF) transceiver, utilize transmitting path RSSI detection module and receiving path RSSI detection module to carry out independently signal strength detection respectively, receiving path and transmitting path can be various general radio frequency transceiver architectures; Test point can be selected flexibly, if be placed on radio frequency part, need the signal frequency that process is higher, be improved, if be placed on intermediate-frequency section, reduce RSSI design difficulty to RSSI design difficulty, but it be larger to detect time delay.
RSSI detection module of the present invention according to system specific requirement, can realize different detection power scopes and intensity.Simultaneously, RSSI detection module can adopt different frameworks to realize, but general purpose obtains one and output voltage corresponding to detection signal power, and this voltage directly by low pass filter modulating output, or can export low and high level by comparator with after reference voltage.
RSSI detection limit can be useful signal or unwanted signal (interference), only needs in the detection power and frequency range of RSSI.
To RSSI carry out logical process logic processing module can according to system specifically need improved realization, its be mainly used in into:
Do you judge that system operating mode is in reception or emission state? does signal power reach expectation strength? whether interference signal larger? according to above judged result, below baseband system result can be fed back to:
During no signal, additional modules can be closed to save power consumption; When having signal, judge signal strength signal intensity, to determine gain control strategies; When having interference, judge interference strength, with adjustment System frequency and Filter specification, optimize frequency spectrum degree of purity.
Fig. 3 is the flow chart of steps of the signal strength detection processing method of a kind of radio-frequency (RF) transceiver of the present invention.As shown in Figure 3, the signal strength detection processing method of a kind of radio-frequency (RF) transceiver of the present invention, comprises the steps:
Step 301, arranges transmitting path RSSI detection module and receiving path RSSI detection module respectively in the transmitting path and receiving path of this radio-frequency (RF) transceiver, to carry out independently signal strength detection respectively to transmitting path and receiving path.
Wherein, the structure of transmitting path RSSI detection module and receiving path RSSI detection module is identical, all comprise: multiple limiting amplifier (Limitter), multiple rectifier (Rectify), a low pass filter (LPF) and a comparator (Comparator), each limiting amplifier is connected to receiving path or transmitting path after connecting successively, each rectifier connects the output of each limiting amplifier respectively, the output of each rectifier delivers to low pass filter LP after suing for peace, carry out delivering to comparator after low-pass filtering through low pass filter LP, output detections result after itself and reference voltage Vref compare and process by comparator, in the present invention, limiting amplifier in each RSSI detection module and rectifier progression are determined by the dynamic range detected and precision, the reference voltage level Vref of comparator can be regulated according to detected amplitude.It should be noted that, the testing result of RSSI detection module directly by low pass filter modulating output, or also can export low and high level by comparator with after reference voltage.
Step 302, logic processing module carries out logical process to the signal strength signal intensity that each RSSI detection module detects, obtains the instruction of different state, to judge the mode of operation of system, signal power and interference strength, thus feeds back to base band and carries out controlling or processing.
Specifically, does according to the signal strength signal intensity detected, logic processing module judge that system operating mode is in reception or emission state? does signal power reach expectation strength? whether interference signal larger? according to above judged result, feed back to the following result of baseband system: during no signal, additional modules can be closed to save power consumption; When having signal, judge signal strength signal intensity, to determine gain control strategies; When having interference, judge interference strength, with adjustment System frequency and Filter specification, optimize frequency spectrum degree of purity.
In sum, a kind of radio-frequency (RF) transceiver of the present invention and signal strength detection processing method thereof are by being expanded existing RSSI detection and gain control function, respectively signal strength detection is carried out to reception and transmitting chain, by judging to receive, the Real-time intensity of signal on transmitting chain, independently received, transmit signal strength instructed voltage, then by these two instructed voltage by certain Digital Logic process, different state instructions can be obtained, to judge the mode of operation of system, signal power and interference strength, thus feed back to base band and carry out controlling or processing.
Above-described embodiment is illustrative principle of the present invention and effect thereof only, but not for limiting the present invention.Any those skilled in the art all without prejudice under spirit of the present invention and category, can carry out modifying to above-described embodiment and change.Therefore, the scope of the present invention, should listed by claims.
Claims (10)
1. a radio-frequency (RF) transceiver, comprise receiving path and transmitting path, it is characterized in that: this radio-frequency (RF) transceiver also comprises RSSI detection module and logic processing module, this RSSI detection module is according to system specific requirement, realize different detection power scopes and intensity, comprise transmitting path RSSI detection module and receiving path RSSI detection module, connect this transmitting path and receiving path respectively, to carry out independently signal strength detection respectively to this transmitting path and receiving path, the output of this transmitting path RSSI detection module and receiving path RSSI detection module all exports logic processing module to, logic processing module is used for carrying out logical process to the signal strength signal intensity that this RSSI detection module detects, obtains the instruction of different state, to judge the mode of operation of system, signal power and interference strength, thus feeds back to base band and carries out controlling or processing.
2. radio-frequency (RF) transceiver as claimed in claim 1, it is characterized in that, this transmitting path RSSI detection module is identical with receiving path RSSI detection module structure, all at least comprise multiple limiting amplifier, multiple rectifier, a low pass filter, each limiting amplifier is connected to receiving path or transmitting path after connecting successively, each rectifier connects the output of each limiting amplifier respectively, the output of each rectifier delivers to this low pass filter after suing for peace, and carries out output detections result after low-pass filtering through this low pass filter.
3. radio-frequency (RF) transceiver as claimed in claim 2, is characterized in that: this RSSI detection module also comprises a comparator, this low pass filter of input termination of this comparator and a reference voltage, output output detections result.
4. radio-frequency (RF) transceiver as claimed in claim 3, is characterized in that: the reference voltage level of this comparator input terminal is regulated according to detected amplitude.
5. radio-frequency (RF) transceiver as claimed in claim 3, is characterized in that: this transmitting path RSSI detection module for detecting transmitting path signal strength signal intensity, before the up-conversion mixer that its test point can be arranged in this transmitting path or the arbitrary node of transmitting path.
6. radio-frequency (RF) transceiver as claimed in claim 3, is characterized in that: this receiving path RSSI detection module for detecting receiving path signal strength signal intensity, after the down-conversion mixer that its test point can be arranged in this receiving path or the arbitrary node of receiving path.
7. radio-frequency (RF) transceiver as claimed in claim 3, is characterized in that: the limiting amplifier in this RSSI detection module and rectifier progression are determined by the dynamic range detected and precision.
8. a signal strength detection processing method for radio-frequency (RF) transceiver, comprises the steps:
Step one, arranges transmitting path RSSI detection module and receiving path RSSI detection module respectively in the transmitting path and receiving path of this radio-frequency (RF) transceiver, to carry out independently signal strength detection respectively to transmitting path and receiving path;
Step 2, logic processing module carries out logical process to the signal strength signal intensity that each RSSI detection module detects, obtains the instruction of different state, to judge the mode of operation of system, signal power and interference strength, thus feeds back to base band and carries out controlling or processing.
9. the signal strength detection processing method of a kind of radio-frequency (RF) transceiver as claimed in claim 8, it is characterized in that: the structure of this transmitting path RSSI detection module and receiving path RSSI detection module is identical, all at least comprise multiple limiting amplifier, multiple rectifier and a low pass filter, each limiting amplifier is connected to receiving path or transmitting path after connecting successively, each rectifier connects the output of each limiting amplifier respectively, the output of each rectifier delivers to this low pass filter after suing for peace, output signal strength testing result after low-pass filtering is carried out through this low pass filter.
10. the signal strength detection processing method of a kind of radio-frequency (RF) transceiver as claimed in claim 8, it is characterized in that: in step 2, according to the signal strength signal intensity detected, logic processing module judges that system operating mode is in reception or emission state, signal power whether reaches expectation strength and whether interference signal is larger, and according to above judged result, feed back to the following result of baseband system:
During no signal, additional modules can be closed to save power consumption; When having signal, judge signal strength signal intensity, to determine gain control strategies; When having interference, judge interference strength, with adjustment System frequency and Filter specification, optimize frequency spectrum degree of purity.
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| CN107769812A (en) * | 2017-10-31 | 2018-03-06 | 乐普医学电子仪器股份有限公司 | A kind of wireless telecommunication system for implantable medical devices |
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