CN108075839B - Device and method for supporting signal power detection of multiple communication systems - Google Patents
Device and method for supporting signal power detection of multiple communication systems Download PDFInfo
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- CN108075839B CN108075839B CN201611020156.1A CN201611020156A CN108075839B CN 108075839 B CN108075839 B CN 108075839B CN 201611020156 A CN201611020156 A CN 201611020156A CN 108075839 B CN108075839 B CN 108075839B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/101—Monitoring; Testing of transmitters for measurement of specific parameters of the transmitter or components thereof
- H04B17/102—Power radiated at antenna
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
- H04B17/29—Performance testing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
- H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
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Abstract
The invention relates to a device and a method for supporting signal power detection of multiple communication systems, wherein the method comprises the following steps: acquiring power signals of each radio remote unit; judging whether the current service signal access state type is a single service signal or a multi-service signal; and respectively calculating the sampling voltage corresponding to the service signal at the moment according to different service signal access state types, and then calculating the corresponding port actual power value according to the corresponding relation between the voltage and the power generated by the early calibration. The invention can carry out real-time power detection on the input and output ports of multi-standard communication signals. The problem that the power of a mixed signal component formed by combining signals of different systems and different frequency bands of a multi-operator base station is complex and difficult to accurately detect at the output antenna feeder end of communication base station equipment is solved, and the method can be applied to accurate measurement of the power of the mixed signal formed by combining signals of multiple different systems, different frequency bands and different powers.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a device and a method for supporting signal power detection of multiple communication systems.
Background
This section is intended to introduce the reader to various aspects of art that may be related to various aspects of the present invention, and is believed to provide the reader with useful background information to facilitate a better understanding of the various aspects of the present invention. Accordingly, it should be understood that the description in this section is for purposes of illustration and is not an admission of prior art.
With the high-speed development of mobile communication technology, multiple operators coexist with 2G, 3G and 4G base stations, and in order to reasonably utilize base station resources, the multi-system access platform is more and more widely applied. The multi-system access platform utilizes a frequency band combiner and an electric bridge combiner to combine and divide signals of various accessed services (including 2G, 3G, 4G and the like), and introduces the signals after combination and division into an antenna feeder distribution system, thereby achieving the purposes of fully utilizing resources and saving investment. The power detection of the input and output service signals of each port of the multi-system access platform, the cavity temperature monitoring and the like realize the functions of remote communication monitoring of each station, abnormal real-time reporting and alarming and the like.
The power detection of the antenna feeder end of the multi-system access platform faces a huge challenge, the signal of the antenna feeder end is a mixed signal obtained by combining multiple paths of signals with different standards, different frequency bands and different powers, and the communication standards comprise GSM, CDMA, WCDMA, TD-SCDMA, TD-LTE and FDD-LTE. The main problems faced are: time division and frequency division signal systems are different, waveforms of signals after detection are different, and signals of different systems are difficult to separate and calculate power of the signals; when the power of different input port signals at the same time is different, the level signals detected by the mixed signals at the antenna feeder terminal are difficult to distinguish; the signal component of the antenna feeder terminal is complex, and the power detection precision is not high.
In the existing power detection scheme, a detector is mostly adopted to detect a service signal, then a voltage waveform signal is output, an analog-to-digital converter (ADC) is used to perform analog-to-digital conversion on the waveform signal, and then a power mode is calculated. For service signals of frequency division multiplexing systems, such as GSM, CDMA, WCDMA, FDD-LTE, a root-mean-square power detector is used to output a stable voltage signal, the voltage is calculated by ADC sampling, and the power of the service signal is obtained by calculating the corresponding power. For the time division multiplexing signal, a method of accurately searching a downlink pilot time slot DwPTS and then calculating power is adopted, the requirements on the sampling rate of a microprocessor and an analog-to-digital converter (ADC) are high, high-speed processors such as an FPGA (field programmable gate array) and a DSP (digital signal processor) are often adopted, the hardware cost is high, and the circuit is not easy to realize. But it is relatively complex for traffic signals of time division multiplexing system, such as TD-SCDMA, TD-LTE. Because the time division multiplexing service signal needs to distinguish uplink and downlink, the signal detected by the detector is a voltage signal with high and low jump cycles. After the service signals of various systems are combined and mixed, it is difficult to accurately detect the downlink pilot time slot DwPTS, and the software of the method is difficult to implement. In most existing schemes, a single determined time division multiplexing service signal is processed by reading a value of a detector output voltage signal at a time of a Downlink Pilot time slot (DW) as an effective value of Downlink output power in a manner of detecting the DW signal. However, because the cell transmitting signals of the two systems TD-SCDMA and TD-LTE are different, it is difficult to accurately detect the output power when the antenna feeder end signal contains the signals of the two systems. The signal components of the mixed service signals of different systems, different frequency bands and different powers are complex, and the power detection accuracy is not high. Similarly, when the antenna end service signal simultaneously contains a service signal of a time division multiplexing system and a service signal of a frequency division multiplexing system, it is more difficult to accurately detect the output power.
Disclosure of Invention
The technical problem to be solved is how to provide a device and a method for supporting signal power detection of multiple communication systems.
Aiming at the defects in the prior art, the invention provides a device and a method for supporting the power detection of signals in various communication modes, which can be applied to the accurate power measurement of mixed signals after the combination of multiple paths of signals in different modes, different frequency bands and different power signals.
In a first aspect, an embodiment of the present invention provides an apparatus for supporting signal power detection in multiple communication systems, including:
the signal acquisition device is used for acquiring a low-power signal coupled out from the high-power service signal;
signal conversion means for converting the low power signal to a voltage signal;
and the data processing device is used for converting the voltage signals into digital signals and then respectively calculating and processing the digital signals according to different service signal access state types to obtain corresponding signal power.
Optionally, the signal acquisition device is a coupler for coupling a part of the low power signal from the high power traffic signal at the antenna feed or signal input.
Optionally, the signal conversion apparatus includes: a multiplexer and a rms response power detector;
and after the multiplexer selects and switches the low-power signal, the root-mean-square response power detector is adopted to detect and convert the radio-frequency signal into a voltage signal.
Optionally, the data processing apparatus includes: low-pass filter and analog-to-digital converter
The low-pass filter is used for filtering high-frequency harmonics of the voltage signal and converting the voltage signal into a digital signal through the analog-to-digital converter.
Optionally, the data processing apparatus further includes:
a service signal access state type judging unit, configured to judge whether a current service signal access state type is a single service signal or a multi-service signal;
and the calculating unit is used for calculating the sampling voltage corresponding to the service signal at the moment according to different service signal access state types, and then calculating the corresponding port actual power value according to the corresponding relation between the voltage and the power generated by the early calibration.
In another aspect, an embodiment of the present invention provides a method for supporting signal power detection in multiple communication systems, including:
acquiring power signals of each radio remote unit;
judging whether the current service signal access state type is a single service signal or a multi-service signal;
and respectively calculating the sampling voltage corresponding to the service signal at the moment according to different service signal access state types, and then calculating the corresponding port actual power value according to the corresponding relation between the voltage and the power generated by the early calibration.
Optionally, the calculating the sampling voltage corresponding to the service signal at this time according to the different service signal access state types respectively includes:
if the previous service signal access status type is a single service signal:
s11: sampling the power signal according to a preset period T within a preset time T to obtain m voltage data;
s12: filtering the sampled n voltage data to obtain n filtered voltage data;
s13: averaging the n voltage data after filtering processing;
s14: finding out N voltage data which are larger than the average value X;
s15: if the number N of the voltage data larger than the average value X is larger than a first threshold value s, calculating an average value X2 of the voltage data larger than the first threshold value s as the voltage data finally participating in power calculation;
s16: if the number N of voltage data greater than the average value X is not greater than the first threshold value S, the average value X is subtracted by a second threshold value Δ S, and the process returns to S14 until the number N of voltage data greater than the average value X is found to be greater than the first threshold value S, and an average value X2 of voltage data greater than the first threshold value S is calculated.
Optionally, the calculating the sampling voltage corresponding to the service signal at this time according to the different service signal access state types respectively includes:
if the previous service signal access status type is a multi-service signal:
s21: sampling the power signal according to a preset period R within a preset time R to obtain p data;
s22: filtering the sampled p voltage data to obtain q voltage data after filtering;
s23: finding out data which is not smaller than a third threshold value delta r in the q voltage data after filtering processing;
s24: averaging Y voltage data not less than a third threshold value delta r;
s25: repeating the steps of S21 to S24 a predetermined number of times, and then averaging the voltage data of the last time to obtain Y2 as the voltage data finally participating in the power calculation.
Optionally, the respective port voltage-to-power correspondence is calculated according to the following formula:
y＝ax^4+bx^3+cx^2+dx+e
wherein a, b, c, d and e are constants, x is voltage data, and y is corresponding power value.
Optionally, the correspondence between the voltage and the power of each port is obtained as follows:
for a single standard frequency band signal interface, a radio frequency signal generator is used for sending single-tone signals corresponding to the central frequency points of the frequency band, the signals are amplified through a power amplifier, and the signals are injected into a radio frequency signal input interface of system equipment according to the step of 0-50dBm by 1 dBm;
collecting and storing voltage values corresponding to 0-50dBm by using the method;
and performing least square curve fitting according to the acquired voltage data and the standard signal power number sent by the signal source to fit the corresponding relation between the voltage and the power.
According to the technical scheme, the device and the method for supporting the power detection of the signals of the multiple communication systems provided by the embodiment of the invention can be used for carrying out real-time power detection on the input and output ports of the communication signals of the multiple communication systems. The invention supports the power detection of signals after any one or two or more than two systems of communication system GSM, CDMA, WCDMA, TD-SCDMA, TD-LTE and FDD-LTE are combined and mixed, can monitor the signal power input by a single port of a multi-system access platform, can also monitor the signal power output after multiple signals of the multi-system access platform are mixed, can be applied to the accurate measurement of the power of mixed signals after the combination of multiple paths of signals with different systems, different frequency bands and different powers, has the measurement error of +/-2 dBm and the measurement range of 0dBm to 50 dBm.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description will be given below of the drawings required for the description of the embodiments or the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an apparatus for supporting signal power detection of multiple communication systems according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an apparatus for supporting signal power detection of multiple communication systems according to another embodiment of the present invention;
fig. 3 is a schematic flow chart of a method for supporting signal power detection of multiple communication systems according to an embodiment of the present invention;
fig. 4 is a flowchart illustrating a method for supporting signal power detection of multiple communication systems according to another embodiment of the present invention;
FIG. 5 is a flow chart illustrating a method for calculating power of a single service signal according to an embodiment of the present invention;
fig. 6 is a flow chart illustrating a method for calculating power of a multi-service signal according to an embodiment of the present invention;
FIG. 7 is a schematic flow chart illustrating a method for generating a relationship curve between voltage and power of each channel according to an embodiment of the present invention;
fig. 8 is a schematic diagram of curve fitting of calibration test data of a multi-system access platform according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the present invention provides an apparatus for supporting signal power detection of multiple communication systems, including: the signal acquisition device is used for acquiring a low-power signal coupled out from the high-power service signal; signal conversion means for converting the low power signal into a voltage signal; and the data processing device is used for converting the voltage signals into digital signals and then respectively calculating and processing the digital signals according to different service signal access state types to obtain corresponding signal power. The following will explain the device supporting signal power detection of multiple communication systems provided by the present invention in detail.
In order to solve the problem that the power detection is difficult to carry out after the combination and mixing of the service signals of various different systems at the antenna feed end, the invention uses a hardware scheme with lower cost in the aspect of hardware. Specifically, as shown in fig. 2, the signal acquisition device is a coupler for coupling a portion of the low power signal from the high power traffic signal at the antenna feed or signal input. A coupler is arranged on system hardware, and a part of low-power signals are coupled out from high-power service signals through the coupler at an antenna feed end or a signal input end.
As shown in fig. 2, the signal conversion apparatus includes: a multiplexer and a rms response power detector; the multiplexer switches the low-power signal selection and then adopts a root-mean-square response power detector to detect and convert the radio-frequency signal into a voltage signal. Specifically, the coupled low-power signal is selectively switched by a multichannel multiplexer, and then a root mean square response power detector is adopted to detect and convert a radio-frequency signal into a voltage signal. In the invention, the RMS response power detector can be an AD8362 RMS response power detection chip of ADI company.
As shown in fig. 2, the data processing apparatus includes: a low pass filter and an analog-to-digital converter; the low-pass filter is used for filtering the high-frequency harmonic wave of the voltage signal and then converting the voltage signal into a digital signal through the analog-to-digital converter. Specifically, the voltage signal is filtered by a low-pass filter to remove high-frequency harmonic waves, the signal is sent to an ADC unit to be subjected to analog-to-digital conversion, and finally the microcontroller is used for carrying out digital processing on the signal to finish final power calculation. The data processing device can select a low-cost MCU chip STM32F103 with an ADC analog-to-digital conversion function module, so that the cost of independently using the ADC analog-to-digital conversion chip is saved. The data processing apparatus further includes: a service signal access state type judging unit, configured to judge whether a current service signal access state type is a single service signal or a multi-service signal; and the calculating unit is used for calculating the sampling voltage corresponding to the service signal at the moment according to different service signal access state types, and then calculating the corresponding port actual power value according to the corresponding relation between the voltage and the power generated by the early calibration. The specific calculation method of the calculation unit is as follows.
In order to further embody the advantages of the apparatus supporting signal power detection of multiple communication systems provided by the present invention, the present invention provides a method for supporting signal power detection of multiple communication systems, which is applied to the apparatus, specifically, as shown in fig. 3, the method includes: acquiring power signals of each radio remote unit; judging whether the current service signal access state type is a single service signal or a multi-service signal; and respectively calculating the sampling voltage corresponding to the service signal at the moment according to different service signal access state types, and then calculating the corresponding port actual power value according to the corresponding relation between the voltage and the power generated by the early calibration. The following is a detailed description of the present invention and the method for supporting signal power detection of multiple communication systems.
As shown in fig. 4, the signal component at the antenna feed end can be divided into two cases, namely, a service signal with only a single communication system and a service signal with a combination of multiple communication systems. The invention can judge whether the power calculation of the antenna feeder end after combination uses a single service signal power calculation method or a multi-service signal mixed power calculation method according to whether the current service signal access state of each Radio Remote Unit (RRU) at the input end of the system is a service signal of a single communication system or a service signal mixed by combining of multiple communication systems. And calculating the sampling voltage corresponding to the service signal at the moment according to the calculation methods under the two conditions, and then calculating the corresponding port actual power value according to the corresponding relation between the voltage and the power generated by the early calibration.
As shown in fig. 5, the method for calculating the power of a single service signal includes:
if the previous service signal access status type is a single service signal:
s11: sampling the power signal according to a preset period T within a preset time T to obtain m voltage data; in the present invention t may be 10ms and n may be 1000.
S12: filtering the sampled n voltage data to obtain n filtered voltage data; the step can filter out large deviation sampling values contained in the signals and generated at the moment of pilot frequency up and down of the signals.
S13: and averaging the n voltage data after filtering processing by X.
S14: and finding out N voltage data which are larger than the average value X.
S15: if the number N of voltage data larger than the average value X is larger than the first threshold value s, calculating the average value X2 of the voltage data larger than the first threshold value s as the voltage data finally participating in the power calculation; the first threshold s may alternatively be 300.
S16: if the number N of voltage data greater than the average value X is not greater than the first threshold value S, the average value X is subtracted by the second threshold value Δ S, and the process returns to S14 until the number N of voltage data greater than the average value X is found to be greater than the first threshold value S, and the average value X2 of the voltage data greater than the first threshold value S is calculated. In this step, Δ s may be 60mV, which is a voltage value corresponding to 1dBm after detection by the detector, and this value is related to each channel coupler and each channel hardware of the system, and can be generally measured through experiments.
The single-service signal power calculation method can be suitable for power detection of single-service signals in communication systems GSM, CDMA, WCDMA, TD-SCDMA, TD-LTE and FDD-LTE.
As shown in fig. 6, the method for calculating the power of the multi-service signal includes:
if the previous service signal access status type is a multi-service signal:
s21: sampling the power signal according to a preset period R within a preset time R to obtain p data; in the present invention r may be chosen to be 10ms and p may be chosen to be 1000.
S22: and filtering the sampled p voltage data to obtain q voltage data after filtering.
S23: finding out data which is not smaller than a third threshold value delta r in the q voltage data after filtering processing; the size of the delta r in the step is determined according to the actual hardware condition, wherein the influence of background noise and uplink signals on the calculation of the output power is mainly eliminated, and the delta r can be 300mV in the invention.
S24: the voltage data not less than the third threshold value Δ r is averaged Y.
S25: repeating S21 to S24 for a preset number of times, and then averaging the voltage data of the last time to obtain Y2 as the voltage data finally participating in power calculation. In the embodiment of the present invention, the predetermined number of times may be selected as 5 times, and the power value obtained more than five times is more accurate but the efficiency may be decreased.
The method for calculating the mixed power of the multiple service signals can be suitable for power detection of signals after combination and mixing of any two or more than two types of services in communication systems GSM, CDMA, WCDMA, TD-SCDMA, TD-LTE and FDD-LTE.
In the invention, as shown in FIG. 7, the corresponding relationship between the voltage and the power of each port can be obtained by using a radio frequency signal generator to send out a single-tone signal corresponding to the central frequency point of the frequency band for a single standard frequency band signal interface, amplifying the signal by a power amplifier, and injecting the signal into a radio frequency signal input interface of system equipment according to the step of 0-50dBm by 1dBm of power. When the radio frequency signal generator is used for sending single-tone signals of the center frequency points of the corresponding frequency bands, other interfaces are not connected with the signals. Voltage values corresponding to 0-50dBm were collected and stored using the claims. As shown in fig. 8, a least squares curve fitting is performed according to the collected voltage data and the standard signal power number sent by the signal source, and a corresponding relationship between the voltage and the power is fitted.
The correspondence of each port voltage to power is calculated as follows (1):
y＝ax^4+bx^3+cx^2+dx+e (1)
and a, b, c, d and e are constants, the values of the a, b, c, d and e after fitting are stored in the microcontroller, x is voltage data, and y is a corresponding power value. During actual power calculation, a voltage of one port is measured to be x through a single service signal power calculation strategy or a multi-service signal mixed power calculation strategy, and then the voltage is substituted into a fitting curve formula 1 of a corresponding channel, so that a corresponding power value y can be calculated.
The curve corresponding to calibration test data (shown in table 1) of a multi-system access platform TD-LTE (F band 1905MHz) is described in detail below for the curve corresponding to each port voltage and power by way of example:
TABLE 1 Multi-System Access platform TD-LTE (F band 1905MHz) calibration test data sheet
| Power (dBm) | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| Voltage (V) | 0.18 | 0.24 | 0.29 | 0.35 | 0.40 | 0.46 | 0.52 | 0.59 | 0.65 | 0.71 |
| Power (dBm) | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 |
| Voltage (V) | 0.77 | 0.83 | 0.90 | 0.96 | 1.02 | 1.09 | 1.16 | 1.23 | 1.32 | 1.38 |
| Power (dBm) | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 |
| Voltage (a)V) | 1.44 | 1.48 | 1.56 | 1.63 | 1.70 | 1.76 | 1.83 | 1.89 | 1.94 | 2.00 |
| Power (dBm) | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 |
| Voltage (V) | 2.06 | 2.11 | 2.16 | 2.22 | 2.27 | 2.31 | 2.37 | 2.41 | 2.46 | 2.51 |
| Power (dBm) | 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 50 |
| Voltage (V) | 2.57 | 2.64 | 2.68 | 2.75 | 2.82 | 2.87 | 2.94 | 3.01 | 3.08 | 3.14 |
The results of fitting the curve were performed using the least squares method according to the data in table 1 above:
y＝-0.8552x4+5.8229x3-12.5907x2+25.6425x-3.5602
wherein, x is a voltage value which is calculated by using a single service signal power calculation method or a multi-service signal mixed power calculation method, the value range is 0 to 3.3V, and the corresponding power value y can be calculated by substituting the measured voltage value x into the formula (1).
In summary, the apparatus and method for supporting power detection of signals of multiple communication systems according to the embodiments of the present invention can perform real-time power detection on input and output ports of communication signals of multiple communication systems. The invention supports the power detection of signals after any one or two or more than two systems of communication system GSM, CDMA, WCDMA, TD-SCDMA, TD-LTE and FDD-LTE are combined and mixed, can monitor the signal power input by a single port of a multi-system access platform, can also monitor the signal power output after multiple signals of the multi-system access platform are mixed, can be applied to the accurate measurement of the power of mixed signals after the combination of multiple paths of signals with different systems, different frequency bands and different powers, has the measurement error of +/-2 dBm and the measurement range of 0dBm to 50 dBm.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element. The terms "upper", "lower", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description. Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be interpreted as reflecting an intention that: that the invention as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention is not limited to any single aspect, nor is it limited to any single embodiment, nor is it limited to any combination and/or permutation of these aspects and/or embodiments. Moreover, each aspect and/or embodiment of the present invention may be utilized alone or in combination with one or more other aspects and/or embodiments thereof.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (8)
1. An apparatus for supporting signal power detection of multiple communication systems, comprising:
the signal acquisition device is used for acquiring a low-power signal coupled out from the high-power service signal;
signal conversion means for converting the low power signal to a voltage signal;
the data processing device is used for converting the voltage signals into digital signals and then respectively calculating and processing the digital signals according to different service signal access state types to obtain the power of corresponding signals;
the data processing apparatus further includes:
a service signal access state type judging unit, configured to judge whether a current service signal access state type is a single service signal or a multi-service signal;
the calculation unit is used for calculating the sampling voltage corresponding to the service signal at the moment according to different service signal access state types, and then calculating the corresponding port actual power value according to the corresponding relation between the voltage and the power generated by the early calibration;
wherein, the calculating the sampling voltage corresponding to the service signal at the time according to the different service signal access state types comprises:
if the previous service signal access status type is a single service signal:
s11: sampling power signals of each radio remote unit within a preset time T according to a preset period T to obtain m voltage data;
s12: filtering the sampled n voltage data to obtain n filtered voltage data;
s13: averaging the n voltage data after filtering processing;
s14: finding out N voltage data which are larger than the average value X;
s15: if the number N of the voltage data larger than the average value X is larger than a first threshold value s, calculating an average value X2 of the voltage data larger than the first threshold value s as the voltage data finally participating in power calculation;
s16: if the number N of voltage data greater than the average value X is not greater than the first threshold value S, the average value X is subtracted by a second threshold value Δ S, and the process returns to S14 until the number N of voltage data greater than the average value X is found to be greater than the first threshold value S, and an average value X2 of voltage data greater than the first threshold value S is calculated.
2. The apparatus of claim 1, wherein the signal acquisition device is a coupler for coupling a portion of the low power signal from the high power traffic signal at the antenna feed or signal input.
3. The apparatus of claim 1, wherein the signal conversion means comprises: a multiplexer and a rms response power detector;
and after the multiplexer selects and switches the low-power signal, the root-mean-square response power detector is adopted to detect and convert the radio-frequency signal into a voltage signal.
4. The apparatus of claim 1, wherein the data processing apparatus comprises: low-pass filter and analog-to-digital converter
The low-pass filter is used for filtering high-frequency harmonics of the voltage signal and converting the voltage signal into a digital signal through the analog-to-digital converter.
5. A method for supporting signal power detection of multiple communication systems is characterized by comprising the following steps:
acquiring power signals of each radio remote unit;
judging whether the current service signal access state type is a single service signal or a multi-service signal;
respectively calculating sampling voltage corresponding to the service signal at the moment according to different service signal access state types, and then calculating corresponding port actual power value according to the corresponding relation between voltage and power generated by early calibration;
wherein, the calculating the sampling voltage corresponding to the service signal at the time according to the different service signal access state types respectively comprises:
if the previous service signal access status type is a single service signal:
s11: sampling the power signal according to a preset period T within a preset time T to obtain m voltage data;
s12: filtering the sampled n voltage data to obtain n filtered voltage data;
s13: averaging the n voltage data after filtering processing;
s14: finding out N voltage data which are larger than the average value X;
s15: if the number N of the voltage data larger than the average value X is larger than a first threshold value s, calculating an average value X2 of the voltage data larger than the first threshold value s as the voltage data finally participating in power calculation;
s16: if the number N of voltage data greater than the average value X is not greater than the first threshold value S, the average value X is subtracted by a second threshold value Δ S, and the process returns to S14 until the number N of voltage data greater than the average value X is found to be greater than the first threshold value S, and an average value X2 of voltage data greater than the first threshold value S is calculated.
6. The method of claim 5, wherein the calculating the sampling voltage corresponding to the service signal at the time according to the different service signal access status types respectively comprises:
if the previous service signal access status type is a multi-service signal:
s21: sampling the power signal according to a preset period R within a preset time R to obtain p data;
s22: filtering the sampled p voltage data to obtain q voltage data after filtering;
s23: finding out data which is not smaller than a third threshold value delta r in the q voltage data after filtering processing;
s24: averaging Y voltage data not less than a third threshold value delta r;
s25: repeating the steps of S21 to S24 a predetermined number of times, and then averaging the voltage data of the last time to obtain Y2 as the voltage data finally participating in the power calculation.
7. The method of claim 5, wherein the respective port voltage to power correspondence is calculated as:
y＝ax^4+bx^3+cx^2+dx+e
wherein a, b, c, d and e are constants, x is voltage data, and y is corresponding power value.
8. The method of claim 7, wherein the respective port voltage to power correspondence is obtained by:
for a single standard frequency band signal interface, a radio frequency signal generator is used for sending single-tone signals corresponding to the central frequency points of the frequency band, the signals are amplified through a power amplifier, and the signals are injected into a radio frequency signal input interface of system equipment according to the step of 0-50dBm by 1 dBm;
acquiring and storing a voltage value corresponding to 0-50dBm by using a single service signal calculation mode;
and performing least square curve fitting according to the acquired voltage data and the standard signal power number sent by the signal source to fit the corresponding relation between the voltage and the power.
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