CN114006627B - Isolation estimation system, method and processing circuit - Google Patents
Isolation estimation system, method and processing circuit Download PDFInfo
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- CN114006627B CN114006627B CN202010729299.XA CN202010729299A CN114006627B CN 114006627 B CN114006627 B CN 114006627B CN 202010729299 A CN202010729299 A CN 202010729299A CN 114006627 B CN114006627 B CN 114006627B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/354—Adjacent channel leakage power
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The present disclosure relates to isolation estimation systems, methods, and processing circuits. An isolation estimation system includes a transmitting device, a first receiving device, a second receiving device, and a processing circuit. The transmitting device is used for sending a transmitting signal to the first receiving device. The transmitting means employs a first communication technique. The second receiving device is used for obtaining the leakage signal power spectrum density of the leakage signal corresponding to the transmission signal. The second receiving means employs a second communication technique. The bandwidth of the second communication technology is smaller than the bandwidth of the first communication technology and supports the frequency hopping procedure. The processing circuit is used for calculating the isolation according to the power spectral density of the signal in the air of the emission signal and the power spectral density of the leakage signal. The isolation is used to determine whether to adjust the transmitting device.
Description
Technical Field
The embodiments described in this disclosure relate to an isolation estimation technique. In particular, it relates to an isolation estimation system, method and processing circuit that can estimate isolation.
Background
With the development of technology (such as but not limited to, internet of things), more and more electronic devices need to have different wireless communication technologies for receiving/transmitting signals at the same time to complete their functions.
However, when different wireless communication technologies transmit signals or receive signals simultaneously, interference may occur between signals of the different communication technologies. These disturbances will lead to an increased error rate of reception of the signal, which in turn will affect the user experience or cause other negative effects.
Disclosure of Invention
Some embodiments of the present disclosure relate to an isolation estimation system. The isolation estimation system comprises a transmitting device, a first receiving device, a second receiving device and a processing circuit. The transmitting device is used for sending a transmitting signal to the first receiving device. The transmitting means employs a first communication technique. The second receiving device is used for obtaining the leakage signal power spectrum density of the leakage signal corresponding to the transmission signal. The receiving device employs a second communication technique. The bandwidth of the second communication technology is smaller than the bandwidth of the first communication technology and supports the frequency hopping procedure. The processing circuit is used for calculating the isolation according to the power spectral density of the signal in the air of the emission signal and the power spectral density of the leakage signal. The isolation is used to determine whether to adjust the transmitting device.
Some embodiments of the present disclosure relate to a method of isolation estimation. The isolation estimation method comprises the following steps: transmitting a transmission signal to a first receiving device by means of a transmitting device, wherein the transmitting device uses a first communication technology; the leakage signal power spectral density of the leakage signal corresponding to the transmission signal is obtained by means of a second receiving device, wherein the second receiving device employs a second communication technique. The bandwidth of the second communication technology is smaller than that of the first communication technology and supports a frequency hopping process; and calculating the isolation by means of a processing circuit according to the power spectral density of the signal in the air of the transmitted signal and the power spectral density of the leakage signal. The isolation is used to determine whether to adjust the transmitting device.
Some embodiments of the present disclosure relate to a processing circuit. The processing circuit is used for calculating the isolation according to the power spectral density of the signal in the air of the transmitted signal and the power spectral density of the leakage signal so as to determine whether to adjust the transmitting device according to the isolation. The transmitting device transmits a transmission signal to the first receiving device. The leakage signal power spectral density corresponds to a leakage signal received by the second receiving device, and the leakage signal corresponds to a transmit signal. The transmitting means employs a first communication technique. The second receiving means employs a second communication technique. The second communication technology has a bandwidth smaller than the first communication technology and supports a frequency hopping procedure.
In summary, the isolation estimation system, method and processing circuit of the present disclosure can estimate the isolation between devices of different communication technologies, so as to adjust the related devices or related parameters later.
Drawings
The foregoing and other objects, features, advantages and embodiments of the disclosure will be apparent from the following description of the drawings in which:
FIG. 1 is a schematic diagram of an isolation estimation system according to some embodiments of the present disclosure;
FIG. 2 is a timing diagram illustrating operation of the isolation estimation system of FIG. 1 according to some embodiments of the present disclosure;
FIG. 3 is a schematic diagram of estimated isolation depicted in accordance with some embodiments of the present disclosure; and
FIG. 4 is a flow chart of an isolation estimation method according to some embodiments of the present disclosure.
Detailed Description
The following examples are set forth in detail in connection with the accompanying drawings, but are not intended to limit the scope of the disclosure, nor are the descriptions of the structure and operation used to limit the order in which they may be performed, any structure in which elements are rearranged to produce a device with equivalent efficiency, nor are they intended to be encompassed by the disclosure. The drawings are for illustration purposes only and are not drawn to scale. For ease of understanding, the same or similar elements will be indicated by the same reference numerals in the following description.
The term "coupled," as used herein, may also refer to "electrically coupled," and the term "connected" may also refer to "electrically connected. "coupled" and "connected" may also mean that two or more elements co-operate or interact with each other.
Reference is made to fig. 1. FIG. 1 is a schematic diagram of an isolation estimation system 100 according to some embodiments of the present disclosure. The isolation estimation system 100 includes a communication device D1 and a communication device D2. Communication device D1 can perform data/signal transmission with communication device D2. For example in fig. 1, the communication device D1 includes a transmitting device TX1, a transmitting device TX2, a receiving device RX1, a receiving device RX2, a processing circuit 120, an antenna A1, and an antenna A2. Communication device D2 includes a transmitting device TX3, a receiving device RX3, and an antenna A3.
The transmitting device TX1, the receiving device RX1, the transmitting device TX3, and the receiving device RX3 employ a first communication technique. The transmitting device TX2 and the receiving device RX2 employ a second communication technique. In some embodiments, the first communication technology is wireless-compatible authentication (Wi-Fi) technology and the second communication technology is Bluetooth (Bluetooth) technology. For example, the transmitting device TX1 may transmit a packet conforming to the wireless-compatible authentication technique through the antenna A1 for the receiving device RX3 to receive through the antenna A3. The transmitting device TX3 may transmit a packet conforming to the wireless-compatible authentication technique through the antenna A3 for the receiving device RX1 to receive through the antenna A1. In addition, the transmitting device TX2 may transmit a packet conforming to the bluetooth technology through the antenna A2. The reception apparatus RX2 may receive the packet conforming to the bluetooth technology through the antenna A2.
In application, wireless-compatible authentication technology and bluetooth technology operate in the same frequency band, such as the industrial scientific medical (Industrial Scientific Medical, ISM) 2.4G band. The bandwidth of the bluetooth technology is smaller than that of the wireless-compliant authentication technology and supports the frequency hopping process. The frequency hopping process is, for example, but not limited to, an adaptive frequency hopping (Adaptive Frequency Hopping, AFH) process.
In some embodiments, the transmitting device TX1 sends a transmitting signal S1 conforming to the wireless-compatible authentication technology to the receiving device RX3 through the antenna A1. The more components in the transmitted signal S1 leak to the receiving device RX2 if the isolation between the antennas A1 and A2 is worse.
When the reception apparatus RX2 receives the leaked leakage signal S1 'through the antenna A2, the reception apparatus RX2 may measure a power spectral density (power spectral density, PSD) of the leakage signal S1' (hereinafter referred to as a leakage signal power spectral density). Next, the processing circuit 120 calculates the isolation between the antenna A1 and the antenna A2 according to the signal power spectral density in the air of the transmission signal S1 and the leakage signal power spectral density of the leakage signal S1'. This isolation represents the degree of interference between devices operating in the same frequency band. The isolation may be used to determine whether to adjust the transmitting device TX1.
In some embodiments, the processing circuit 120 is implemented with a wireless-compatible authentication technology driver (Wi-Fi driver) and is at least operable to control the transmitting device TX1, the receiving device RX1, and the receiving device RX2, but the disclosure is not limited thereto.
In some related arts, the isolation between the antennas A1 and A2 is determined by a network analyzer in combination with an inter-antenna distance estimation method. However, the network analyzer needs to operate on a platform with external contacts, and the antenna placement during measurement may be different from the actual situation, so the measurement result may be misaligned.
In some other related art, isolation estimation is performed using a portion of the transmission signal leaked from the transmission circuit TX2 to the reception apparatus RX 1. However, in these other related arts, since the reception apparatus RX1 does not support the frequency hopping process, a correct signal may not be sampled during the measurement process, resulting in an error. To solve the above problem, an additional circuit is required to be provided inside the reception apparatus RX1 that does not support the frequency hopping process. This can lead to higher circuit complexity and increased cost.
In comparison with these related arts described above, the present disclosure makes use of the portion leaked from the transmission circuit TX1 to the reception device RX2 (i.e., the leakage signal S1') for isolation estimation. Because the bandwidth of the receiving device RX2 is small and supports the frequency hopping process, the present disclosure can receive the correct signal to avoid errors. In addition, the present disclosure may not require additional circuitry and only need to learn the operational state of the relevant device and complete subsequent isolation estimation with the addition of two bits of signals inside the circuitry.
Reference is made to fig. 2. FIG. 2 is a timing diagram illustrating operation of the isolation estimation system 100 of FIG. 1 according to some embodiments of the present disclosure.
As described above, the present disclosure can add two-bit signals inside the circuit to know the operation states of the transmitting device TX1 and the receiving device RX 1. In detail, the bit wl_tx_on and the bit wl_rx_on may be added inside the circuit. The two bits form a reporting pattern, and the reporting pattern may represent the operation states of the transmitting device TX1 and the receiving device RX 1. For example, when bit wl_tx_on is 1 and bit wl_rx_on is 0, the reporting pattern is 10. This represents that the transmitting device TX1 is in a transmitting state. When bit wl_tx_on is 0 and bit wl_rx_on is 1, the report pattern is 01. This represents that the reception apparatus RX1 is in the reception state. When bit wl_tx_on is 0 and bit wl_rx_on is 0, the report pattern is 00. This means that the transmitting device TX1 and the receiving device RX1 are not in a transmitting state nor in a receiving state. At this point background noise will be measurable. In addition, between the driving power spectral density command and the stopping driving power spectral density command, the reception apparatus RX2 may be controlled to periodically measure the power spectral density.
How the processing circuit 120 calculates the isolation between the antenna A1 and the antenna A2 will be described in detail below.
Let the signal power spectral density in the air of the transmission signal S1 be X (dBm/MHz), the leakage signal power spectral density of the leakage signal S1' leaking to the reception device RX2 be Z (dBm/MHz), and the background noise power spectral density be Y (dBm/MHz). The processing circuit 120 may calculate the isolation according to the signal power spectral density X, the leakage signal power spectral density Z, and the background noise power spectral density Y in the air.
First, in order to consider the influence of the background noise power spectral density Y, the parameter W (dBm/MHz) is defined as the following formula (1):
after calculating the parameter W, the processing circuit 120 may calculate an average value of the signal power spectral density X in the air and an average value of the parameter W. Next, the processing circuit 120 calculates the isolation using the following equation (2):
wherein IV (dB) is isolation, X AVG In-band (in-band) average value, W, of wireless compatible authentication technology for signal power spectral density, X, in air AVG Is the in-band average value of the wireless compatibility authentication technology of the parameter W.
The following will exemplify the way in which the isolation is estimated in different cases.
If the leakage signal power spectral density Z is greater than the background noise power spectral density Y and the difference between the leakage signal power spectral density Z and the background noise power spectral density Y is greater than a first value (e.g., Z > Y + 10), it is representative that the leakage signal power spectral density Z is much greater than the background noise power spectral density Y. In this case, the background noise power spectral density Y is negligible and the parameter W in equation (1) may be reduced to be equal to the leakage signal power spectral density Z. Accordingly, the isolation IV of equation (2) may instead be equal to the wireless-compatible authentication in-band average of the signal power spectral density X in air minus the wireless-compatible authentication in-band average of the leakage signal power spectral density Z.
If the leakage signal power spectral density Z is greater than the background noise power spectral density Y and the difference between the leakage signal power spectral density Z and the background noise power spectral density Y is less than or equal to the first value and greater than or equal to the second value (e.g., Y+10. Gtoreq.Z.gtoreq.Y+1), then this represents that the leakage signal power spectral density Z is not much greater than the background noise power spectral density Y, although the leakage signal power spectral density Z is greater than the background noise power spectral density Y. In this case, the background noise power spectral density Y is not negligible and the parameter W still corresponds to the above formula (1). Accordingly, the isolation IV of equation (2) may still be equal to the wireless-compliant authentication technology in-band average of the signal power spectral density X in air minus the wireless-compliant authentication technology in-band average of the parameter W.
If the leakage signal power spectral density Z is equal to or less than the background noise power spectral density Y (e.g., Z ≅ Y or Z < Y), or the difference between the leakage signal power spectral density Z and the background noise power spectral density Y is less than a second value (e.g., Z < y+1), the leakage signal S1' representing leakage to the receiving device RX2 is covered by the background noise. In this case, the parameter W does not conform to the above formula (1) and needs to be corrected to the parameter W'. The parameter W' is equal to the background noise power spectral density Y minus an estimate, as shown in equation (3):
in some embodiments, the estimate a is equal to 6. If the estimated value A is equal to 6, the parameter W' is equal to Y-6. The isolation IV of equation (2) is instead equal to the wireless-compatible authentication in-band average of the signal power spectral density X in air minus the wireless-compatible authentication in-band average of the parameter W'.
In some embodiments, if the calculated isolation is less than a threshold, it represents that there is an excessive component in the transmitted signal S1 leaking to the receiving apparatus RX2. Accordingly, the processing circuit 120 may reduce the transmission power of the transmitting device TX1 to transmit the transmission signal S1 with lower power.
Reference is made to fig. 3. FIG. 3 is a schematic diagram of estimated isolation depicted in accordance with some embodiments of the present disclosure. Fig. 3 is a schematic diagram illustrating parameters used in the above operation process, and fig. 3 is merely an example, which is not limited thereto. For the example of fig. 3, the actual isolation is 15 db, while the estimated isolation is 13.5 db.
Refer to fig. 4. Fig. 4 is a flow chart of an isolation estimation method 400 according to some embodiments of the present disclosure. The isolation estimation method 400 includes operations S410, S420, and S430. In some embodiments, the isolation estimation method 400 of fig. 4 may be applied to the isolation estimation system 100 of fig. 1.
In operation S410, a transmission signal S1 is emitted by means of the transmission device TX1. In some embodiments, the transmitting device TX1 employs a wireless-compatible authentication technique and emits a transmit signal S1 that conforms to the wireless-compatible authentication technique.
In operation S420, a leakage signal power spectral density of the leakage signal S1' corresponding to the transmission signal S1 is obtained by means of the reception device RX2. In some embodiments, the receiving device RX2 employs bluetooth technology. The bandwidth of the bluetooth technology is smaller than that of the wireless compatible authentication technology, and the bluetooth technology supports a frequency hopping process.
In operation S430, the isolation between the antennas A1 and A2 is estimated by the processing circuit 120 according to the power spectral density of the signal in the air of the transmission signal S1 and the power spectral density of the leakage signal S1'. The calculated isolation may be used to determine whether to adjust the transmitting device TX1. In some embodiments, the calculated isolation may be used as a reference for adjusting the transmission power of the transmitting device TX1.
The operations of the isolation estimation method 400 described above are merely examples and are not limited to be performed in the order in this example. The various operations of the isolation estimation method 400 may be added, substituted, omitted, or performed in a different order as appropriate without departing from the manner and scope of operation of the various embodiments of the present disclosure.
In summary, the isolation estimation system, method and processing circuit of the present disclosure can estimate the isolation between devices of different communication technologies, so as to adjust the related devices or related parameters later.
Various functional elements and blocks have been disclosed herein. It will be appreciated by those of ordinary skill in the art that the functional blocks may be implemented by circuits, whether special purpose circuits or general purpose circuits operating under the control of one or more processors and encoded instructions, which generally include transistors or other circuit elements to control the operation of the electrical circuits in accordance with the functions and operations described herein. It is to be further understood that the specific structure and interconnections of the circuit elements in general may be determined by a compiler (e.g., a register transfer language (Register Transfer Language, RTL) compiler). The register transfer language compiler operates on a script (script) that is quite similar to the assembly language code (assembly language code), compiling the script into a form for layout or making the final circuit. Indeed, register transfer languages are known for their role and use in facilitating the design of electronic and digital systems.
While the present disclosure has been disclosed in terms of embodiments, it is not intended to limit the disclosure, and various changes and modifications may be made by one of ordinary skill in the art without departing from the spirit and scope of the disclosure, and therefore the scope of the disclosure should be assessed accordingly to that of the appended claims.
[ symbolic description ]
100: communication system
120: processing circuit
400: isolation estimation method
D1: communication device
D2: communication device
A1: antenna
A2: antenna
A3: antenna
TX1: transmitting device
TX2: transmitting device
TX3: transmitting device
RX1: receiving device
RX2: receiving device
RX3: receiving device
S1: transmitting a signal
S1': leakage signal
Wl_tx_on: bit position
Wl_rx_on: bit position
S410: operation of
S420: operation of
S430: and (3) operating.
Claims (9)
1. An isolation estimation system, comprising:
a transmitting device, which adopts a first communication technology;
a first receiving device, wherein the transmitting device is used for transmitting a transmitting signal to the first receiving device;
a second receiving device for obtaining a leakage signal power spectrum density of a leakage signal corresponding to the transmission signal, wherein the second receiving device adopts a second communication technology, wherein a bandwidth of the second communication technology is smaller than a bandwidth of the first communication technology and supports a frequency hopping process; and
the processing circuit is used for calculating the isolation according to the power spectrum density of the signal in the air of the emission signal, the power spectrum density of the leakage signal and the power spectrum density of the background noise,
wherein the isolation is used to determine whether to adjust the transmitting device.
2. The isolation estimation system of claim 1 wherein the first communication technology is wireless-compatible authentication (Wi-Fi) technology and the second communication technology is Bluetooth (Bluetooth) technology.
3. The isolation estimation system of claim 1, wherein the frequency hopping process is Adaptive frequency hopping (Adaptive FrequencyHopping, AFH).
4. The isolation estimation system of claim 1 wherein the processing circuit calculates the isolation based on the in-air signal power spectral density and the leakage signal power spectral density if the leakage signal power spectral density is greater than the background noise power spectral density and a difference between the leakage signal power spectral density and the background noise power spectral density is greater than a first value.
5. The isolation estimation system of claim 1, wherein if the leakage signal power spectral density is greater than the background noise power spectral density and a difference between the leakage signal power spectral density and the background noise power spectral density is less than or equal to a first value and greater than or equal to a second value, the processing circuit calculates the isolation based on the in-air signal power spectral density, the background noise power spectral density, and the leakage signal power spectral density.
6. The isolation estimation system of claim 1 wherein the processing circuit calculates the isolation based on the in-air signal power spectral density, the background noise power spectral density, and an estimate if the leakage signal power spectral density is equal to or less than the background noise power spectral density, or if the leakage signal power spectral density is less than the background noise power spectral density and a difference between the leakage signal power spectral density and the background noise power spectral density is less than a second value.
7. The isolation estimation system of claim 1 wherein the processing circuit turns down the transmit power of the transmitting device if the calculated isolation is less than a threshold.
8. An isolation estimation method, comprising:
transmitting a transmission signal to a first receiving device by means of a transmitting device, wherein the transmitting device employs a first communication technology;
obtaining a leakage signal power spectral density of a leakage signal corresponding to the transmission signal by means of a second receiving device, wherein the second receiving device employs a second communication technology, wherein a bandwidth of the second communication technology is smaller than a bandwidth of the first communication technology and supports a frequency hopping procedure; and
calculating the isolation by means of a processing circuit based on the in-air signal power spectral density of the transmitted signal, the leakage signal power spectral density and the background noise power spectral density,
wherein the isolation is used to determine whether to adjust the transmitting device.
9. A processing circuit for calculating isolation according to signal power spectral density, leakage signal power spectral density and background noise power spectral density in the air of the transmitted signal to determine whether to adjust the transmitting device according to the isolation,
wherein the transmitting means transmits a transmit signal to the first receiving means, wherein the leakage signal power spectral density corresponds to a leakage signal received by the second receiving means, and the leakage signal corresponds to the transmit signal,
wherein the transmitting device employs a first communication technology, wherein the second receiving device employs a second communication technology, wherein the second communication technology has a bandwidth that is smaller than the first communication technology and supports a frequency hopping procedure.
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