CN111162809A - Wireless receiver and wireless device - Google Patents
Wireless receiver and wireless device Download PDFInfo
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- CN111162809A CN111162809A CN201911279284.1A CN201911279284A CN111162809A CN 111162809 A CN111162809 A CN 111162809A CN 201911279284 A CN201911279284 A CN 201911279284A CN 111162809 A CN111162809 A CN 111162809A
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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
- H04B1/06—Receivers
- H04B1/16—Circuits
- H04B1/18—Input circuits, e.g. for coupling to an antenna or a transmission line
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
- H03G3/20—Automatic control
- H03G3/30—Automatic control in amplifiers having semiconductor devices
- H03G3/3036—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers
- H03G3/3042—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers in modulators, frequency-changers, transmitters or power amplifiers
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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
- H04B1/06—Receivers
- H04B1/16—Circuits
- H04B1/26—Circuits for superheterodyne receivers
Abstract
The invention provides a wireless receiver and wireless equipment, the wireless receiver includes: a radio frequency front-stage circuit and a radio frequency rear-stage circuit; the radio frequency post-stage circuit comprises a gain processing circuit, the gain processing circuit comprises a plurality of gain channels, and the gains corresponding to the gain channels are different; the radio frequency front stage circuit is used for receiving a first radio frequency signal from the radio frequency antenna and processing the first radio frequency signal to obtain a second radio frequency signal; the radio frequency post-stage circuit is used for processing the second radio frequency signal through one or more gain channels in the gain processing circuit to obtain a third radio frequency signal, so that the strength of a digital signal obtained according to the third radio frequency signal meets a preset condition. Because the gain processing circuit is provided with a plurality of gain channels, the gain corresponding to each gain channel is different, and different gain channels can be adopted for processing aiming at radio frequency signals with different strengths, so that the strength range of the radio frequency signals which can be received and processed by the wireless receiver is enlarged.
Description
Technical Field
The present invention relates to wireless communication technologies, and in particular, to a wireless receiver and a wireless device.
Background
The wireless receiver has wide application in a radio frequency communication circuit, the radio frequency processing scheme of the wireless receiver is mature at present, but with the increase of application scenes, the requirements on the signal quality under different scenes are higher and higher. As such, wireless receivers need to receive and process radio frequency signals of various strengths in different scenarios.
A radio receiver typically includes a radio frequency front-end circuit and a radio frequency back-end circuit. In the prior art, in order to enable a wireless receiver to receive and process a radio frequency signal with lower strength, a low-noise amplifier is usually added in a radio frequency front-stage circuit, and the radio frequency signal is subjected to gain amplification processing through the low-noise amplifier.
However, the strength range of the rf signal that the wireless receiver in the above prior art can receive and process is still limited, so that the wireless receiver cannot be applied to various different scenarios.
Disclosure of Invention
The invention provides a wireless receiver and wireless equipment, which are used for solving the problem that the wireless receiver in the prior art cannot be applied to various different scenes due to the fact that the strength range of a radio frequency signal which can be received and processed by the wireless receiver is limited.
In a first aspect, an embodiment of the present invention provides a wireless receiver, including:
a radio frequency front-stage circuit and a radio frequency rear-stage circuit;
the radio frequency post-stage circuit comprises a gain processing circuit, the gain processing circuit comprises a plurality of gain channels, and the gains corresponding to the gain channels are different;
the radio frequency front stage circuit is used for receiving a first radio frequency signal from a radio frequency antenna and processing the first radio frequency signal to obtain a second radio frequency signal; the radio frequency post-stage circuit is used for processing the second radio frequency signal through one or more gain channels in the gain processing circuit to obtain a third radio frequency signal, so that the strength of a digital signal obtained according to the third radio frequency signal meets a preset condition.
Optionally, each of the gain channels includes a plurality of first low noise amplifiers arranged in cascade, and each of the first low noise amplifiers includes three operation states: a direct-on state, an amplified state, and an attenuated state.
Optionally, the radio frequency pre-stage circuit includes a second low noise amplifier, and the second low noise amplifier includes three operating states: a direct-on state, an amplified state, and an attenuated state.
Optionally, the radio frequency back-stage circuit further includes: the SSBI controller is respectively connected with the gain control circuit, the gain processing circuit and the second low noise amplifier;
the gain control circuit is used for determining a target working state of the second low noise amplifier according to the strength of the digital signal corresponding to the third radio frequency signal output by the gain processing circuit, and controlling the second low noise amplifier to work in the target working state through an SSBI controller.
Optionally, the gain control circuit is further configured to determine a target gain channel of the gain processing circuit according to the strength of the digital signal, determine a target operating state corresponding to each first low noise amplifier in the target gain channel according to a system gain of the target gain channel and a gain corresponding to a target operating state of the second low noise amplifier, and control each first low noise amplifier to operate in the corresponding target operating state.
Optionally, the radio frequency back-stage circuit further includes: the gain processing circuit, the A/D, the DVGA and the gain control circuit are connected in sequence;
the A/D is used for carrying out analog-to-digital conversion on the third radio frequency signal output by the gain processing circuit to obtain a digital signal corresponding to the third radio frequency signal;
the DVGA is used for outputting the strength of the digital signal to the gain control circuit;
the DVGA is further configured to gain amplify the digital signal so that the strength of the gain-amplified digital signal satisfies the preset condition.
Optionally, a mixer is further disposed between the gain processing circuit and the a/D, and the mixer is configured to change a frequency of the third radio frequency signal output by the gain processing circuit.
Optionally, the radio frequency front stage circuit further includes: a first filter disposed at an input of the second low noise amplifier;
the first filter is used for filtering the first radio frequency signal received from the radio frequency antenna.
Optionally, the radio frequency front stage circuit further includes: a second filter disposed at an output of the second low noise amplifier;
the second filter is used for filtering the second radio frequency signal output by the second low noise amplifier.
In a second aspect, an embodiment of the present invention provides a wireless device, including a radio frequency antenna and the wireless receiver according to the first aspect;
the radio frequency front stage circuit is connected with the radio frequency antenna.
An embodiment of the present invention provides a wireless receiver, including: a radio frequency front-stage circuit and a radio frequency rear-stage circuit; the radio frequency post-stage circuit comprises a gain processing circuit, the gain processing circuit comprises a plurality of gain channels, and the gains corresponding to the gain channels are different; the radio frequency front stage circuit is used for receiving a first radio frequency signal from a radio frequency antenna and processing the first radio frequency signal to obtain a second radio frequency signal; the radio frequency post-stage circuit is used for processing the second radio frequency signal through one or more gain channels in the gain processing circuit to obtain a third radio frequency signal, so that the strength of a digital signal obtained according to the third radio frequency signal meets a preset condition. Because the gain processing circuit included in the radio frequency post-stage circuit has a plurality of gain channels, each gain channel corresponds to different gains, when the wireless receiver receives signals with different signal strengths, different gain channels can be selected, so that the strength of the digital signal corresponding to the third signal meets the preset condition, the wireless receiver can receive the signals with different signal strengths, the strength range of the radio frequency signal which can be received and processed by the wireless receiver is enlarged, and the wireless receiver can be applied to various different scenes.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a wireless receiver according to an embodiment of the present invention;
fig. 2A is a schematic structural diagram of a low noise amplifier according to an embodiment of the present invention;
fig. 2B is a schematic structural diagram of another low noise amplifier according to an embodiment of the present invention;
fig. 2C is a schematic structural diagram of another low noise amplifier according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another wireless receiver according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another wireless receiver according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of another wireless receiver according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of another wireless receiver according to an embodiment of the present invention;
FIG. 7 is a schematic diagram illustrating gain switching of a four-stage low noise amplifier according to an embodiment of the present invention;
fig. 8A is a schematic diagram of a gain matching logic according to an embodiment of the present invention;
FIG. 8B is a schematic diagram of another gain matching logic according to an embodiment of the present invention;
FIG. 8C is a schematic diagram of another gain matching logic according to an embodiment of the present invention
Fig. 9A is a state control switching diagram of a finite state machine according to an embodiment of the present invention;
FIG. 9B is a state control switch diagram of another finite state machine according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of a wireless device according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of another wireless device according to an embodiment of the present invention.
Detailed Description
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 only a part of the embodiments of the present invention, and not all of the embodiments. 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.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The technical solution of the present invention will be described in detail below with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.
Fig. 1 is a schematic structural diagram of a wireless receiver according to an embodiment of the present invention, and as shown in fig. 1, the wireless receiver according to the embodiment includes: a radio frequency front-stage circuit and a radio frequency rear-stage circuit.
The radio frequency post-stage circuit comprises a gain processing circuit, the gain processing circuit comprises a plurality of gain channels, and gains corresponding to the gain channels are different. The radio frequency front stage circuit is used for receiving a first radio frequency signal from the radio frequency antenna and processing the first radio frequency signal to obtain a second radio frequency signal; the radio frequency post-stage circuit is used for processing the second radio frequency signal through one or more gain channels in the gain processing circuit to obtain a third radio frequency signal, so that the strength of a digital signal obtained according to the third radio frequency signal meets a preset condition.
In this embodiment, the rf front-stage circuit refers to a circuit located between the rf transceiver (also referred to as the rf back-stage circuit in this embodiment) and the rf antenna. The radio frequency front-stage circuit is used for processing a first radio frequency signal received from the radio frequency antenna and transmitting an obtained second radio frequency signal to the radio frequency transceiver so that the radio frequency transceiver can perform subsequent processing on the second radio frequency signal.
Wherein, the radio frequency front stage circuit can include: filters, Low Noise Amplifiers (LNAs), and the like. Wherein the filter is used for filtering out-of-band noise or system noise. The lna, which may also be referred to as a lna, is a radio frequency device for linearly amplifying a received signal, and its core indexes are an operating frequency band, a Noise Figure (NF), a gain, and a maximum input power (this is to prevent saturation of the amplified signal by the lna, which leads to distortion of the received signal). The low noise amplifier is used for performing gain processing on a first radio frequency signal received from the radio frequency antenna. Fig. 2A and 2B are schematic diagrams of two possible configurations of the low noise amplifier. As shown in fig. 2A, the low noise amplifier is a low noise amplifier without a pass-through function, and an enable terminal controls the low noise amplifier to be in an operating state or an off state; as shown in fig. 2B, the low noise amplifier with bypass function is a low noise amplifier, in which a switch channel is integrated inside a chip, and a control terminal is used to control whether the low noise amplifier is in a signal amplification operating state or a signal bypass operating state. It should be noted that fig. 2A and fig. 2B are only schematic diagrams of two possible structures with low noise amplification, and other structures may also be adopted in practical applications, as shown in fig. 2C, which is not limited in this embodiment.
The radio frequency back stage circuit is a circuit positioned between the radio frequency front stage circuit and the baseband system. The radio frequency back-stage circuit can be a circuit corresponding to the radio frequency transceiver. The radio frequency back stage circuit is used for processing the second radio frequency signal received from the radio frequency front stage circuit to obtain a third radio frequency signal. The processing procedure may include gain amplification processing, frequency mixing processing, and the like, so that the strength of the digital signal corresponding to the obtained third radio frequency signal satisfies a preset condition. The preset condition may be that the strength of the digital signal reaches the strength range of the intermediate frequency signal of the receiver, that is, the signal strength floats within a certain range, thereby avoiding signal disorder.
As shown in fig. 1, the rf post-stage circuit includes a plurality of gain channels, and the gain channels have different gains. For example, when two gain channels are included, the two gain channels may be a high gain channel and a low gain channel, respectively, and the gain corresponding to the high gain channel is greater than the gain corresponding to the low gain channel. When three gain channels are included, the three gain channels may be a high gain channel, a medium gain channel, and a low gain channel, respectively, a gain corresponding to the high gain channel is greater than a gain corresponding to the medium gain channel, and a gain corresponding to the medium gain channel is greater than a gain corresponding to the low gain channel. Of course, a greater number of gain channels may be included, and the number of gain channels is not limited in this embodiment.
It can be understood that when the wireless receiver is applied to different scenarios, or even to the same scenario, the strength of the first radio frequency signal received by the radio frequency antenna of the wireless receiver at different times is different. In this embodiment, after the rf front-end circuit receives the first rf signal from the rf antenna, the rf front-end circuit processes the first rf signal to obtain the second rf signal. Then, the rf post-stage circuit may select, according to the second rf signal, to process the second rf signal by using a different gain channel in the gain processing circuit. For example: when the strength of the second radio frequency signal is low, the second radio frequency signal may be processed by using a high gain channel, and when the strength of the second radio frequency signal is high, the second radio frequency signal may be processed by using a low gain channel. Therefore, different gain channels are adopted for processing according to the strength of the second radio frequency signal, the strength of the obtained third radio frequency signal can be ensured to be within a certain range, and the strength of the digital signal corresponding to the third radio frequency signal can meet the strength range of the intermediate frequency signal of the receiver.
When the rf post-stage circuit processes the second rf signal, one or more gain channels may be selected, which is not limited in this embodiment.
In this embodiment, the wireless receiver includes: a radio frequency front-stage circuit and a radio frequency rear-stage circuit; the radio frequency post-stage circuit comprises a gain processing circuit, the gain processing circuit comprises a plurality of gain channels, and the gains corresponding to the gain channels are different; the radio frequency front stage circuit is used for receiving a first radio frequency signal from the radio frequency antenna and processing the first radio frequency signal to obtain a second radio frequency signal; the radio frequency post-stage circuit is used for processing the second radio frequency signal through one or more gain channels in the gain processing circuit to obtain a third radio frequency signal, so that the strength of a digital signal obtained according to the third radio frequency signal meets a preset condition. Because the gain processing circuit in the radio frequency rear-stage circuit comprises a plurality of gain channels, the gains corresponding to the gain channels are different, the radio frequency rear-stage circuit can select different gain channels in the gain processing circuit to process the second radio frequency signal according to the intensity of the second radio frequency signal, so that the intensity of the obtained third radio frequency signal can be ensured to be within a certain range, the intensity of the digital signal corresponding to the third radio frequency signal meets the preset condition, the wireless receiver can receive and process the radio frequency signals with different signal intensities, and the wireless receiver can be applied to various different scenes.
Fig. 3 is a schematic structural diagram of another wireless receiver according to an embodiment of the present invention. On the basis of the embodiment shown in fig. 1, the present embodiment will explain in detail possible structures of the gain channel and the rf front-stage circuit.
The wireless receiver includes: a radio frequency front-stage circuit and a radio frequency rear-stage circuit.
The radio frequency post-stage circuit comprises a gain processing circuit, the gain processing circuit comprises a plurality of gain channels, and gains corresponding to the gain channels are different; as shown in fig. 3, each gain channel includes a plurality of first low noise amplifiers arranged in cascade, and each first low noise amplifier includes three operating states: a direct-on state, an amplified state, and an attenuated state.
In this embodiment, the number of the first low noise amplifiers in each gain channel is not limited. Fig. 3 illustrates four stages as an example. As shown in fig. 3, each gain channel includes four first low noise amplifiers arranged in cascade, and each first low noise amplifier includes three operation states: a direct-on state, an amplified state, and an attenuated state. Illustratively, each gain channel may be composed of a cascade of four first low noise amplifiers. In some scenarios, each gain channel may also be cascaded with eight first low noise amplifiers. It can be understood that the range of signal intensity processed by the gain channel composed of four low noise amplifier cascades is relatively small compared with the range of signal intensity processed by the gain channel composed of eight low noise amplifier cascades, and the range of signal intensity processed is wider as the number of the first low noise amplifiers included in the gain channel is larger. Of course, a larger number of first low noise amplifiers may be included, and the number of the first low noise amplifier cascades is not limited in this embodiment.
It can be understood that when the wireless receiver is applied to different scenarios, or even to the same scenario, the strength of the first radio frequency signal received by the radio frequency antenna of the wireless receiver at different times is different. In this embodiment, after the rf front-end circuit receives the first rf signal from the rf antenna, the second low noise amplifier in the rf front-end circuit processes the first rf signal to obtain a second rf signal. Then, the radio frequency subsequent stage circuit can select different gain channels according to the second radio frequency signal, and meanwhile, the first low noise amplifier is enabled to be in different working states. For example: when the strength of the second radio frequency signal is low, a high gain channel can be adopted, one or more of first low noise amplifiers cascaded in the high gain channel are in an amplification state to process the second radio frequency signal, when the strength of the second radio frequency signal is high, a low gain channel can be adopted, one or more of first low noise amplifiers cascaded in the low gain channel are in an attenuation state to process the second radio frequency signal, and when the strength of the second radio frequency signal is moderate, any one gain channel in the high and low gain channels can be selected, and the first low noise amplifiers cascaded in the gain channels are all in a through state to process the second radio frequency signal. Therefore, the first low noise amplifier with different gain channels and different working states can be adopted for processing according to the strength of the second radio frequency signal. Therefore, the intensity of the obtained third radio frequency signal can be ensured to be within a certain range by adopting different gain channels and first low noise amplifiers in different working states for processing according to the intensity of the second radio frequency signal, so that the intensity of the digital signal corresponding to the third radio frequency signal meets the preset condition.
When the rf post-stage circuit processes the second rf signal, one or more gain channels may be selected, which is not limited in this embodiment.
In this embodiment, each gain channel includes a plurality of first low noise amplifiers arranged in cascade, and each first low noise amplifier includes three operating states: the direct-current state, the amplification state and the attenuation state can be processed by adopting different gain channels and first low noise amplifiers in different working states according to the intensity of the second radio frequency signal, the intensity of the obtained third radio frequency signal can be ensured to be within a certain range, and therefore the intensity of the digital signal corresponding to the third radio frequency signal meets the preset condition.
Optionally, the radio frequency front-stage circuit includes a second low noise amplifier, and the second low noise amplifier includes three operating states: a direct-on state, an amplified state, and an attenuated state.
In this embodiment, as shown in fig. 3, the rf front-end stage includes a second low noise amplifier. After receiving the first radio frequency signal from the radio frequency antenna, the radio frequency front-stage circuit processes the first radio frequency signal through the second low noise amplifier to obtain a second radio frequency signal. When the second low noise amplifier processes the first radio frequency signal, the second low noise amplifier may perform signal pass-through processing, signal amplification processing, or signal attenuation processing. For example, the control module may control whether the second low noise amplifier operates in the pass-through state, the amplification state, or the attenuation state by integrating the control module in the second low noise amplifier.
It can be understood that when the wireless receiver is applied to different scenarios, or even to the same scenario, the strength of the first radio frequency signal received by the radio frequency antenna of the wireless receiver at different times is different. In this embodiment, after the rf front-end circuit receives the first rf signal from the rf antenna, the operating state of the second low noise amplifier may be selected according to the strength of the first rf signal. For example, when the strength of the first radio frequency signal is weak, the operating state of the second low noise amplifier may be in an amplification state to obtain the second radio frequency signal, when the strength of the first radio frequency signal is strong, the operating state of the second low noise amplifier may be in an attenuation state to obtain the second radio frequency signal, and when the strength of the first radio frequency signal is moderate, the operating state of the second low noise amplifier may be in a direct-on state to obtain the second radio frequency signal. Therefore, the second low-noise amplifiers in different working states are adopted for processing according to the intensity of the first radio-frequency signal, the intensity range of the third radio-frequency signal obtained after the second radio-frequency signal is processed can be ensured to be within a certain range, and the intensity of the digital signal corresponding to the third radio-frequency signal meets the preset condition.
In this embodiment, since the radio frequency pre-stage circuit further includes the second low noise amplifier, and the second low noise amplifier includes three operating states, i.e., a direct-on state, an amplification state, and an attenuation state, the second low noise amplifier can be in different operating states according to the first radio frequency signal to process the second low noise amplifier, so as to obtain the second radio frequency signal, and enhance the relatively good receiving performance of the radio frequency pre-stage circuit.
Fig. 4 is a schematic structural diagram of another wireless receiver according to an embodiment of the present invention, and based on the embodiment shown in fig. 3, this embodiment describes in detail possible structures of an rf post-stage circuit and an rf pre-stage circuit.
The wireless receiver comprises a radio frequency front-stage circuit and a radio frequency rear-stage circuit. The radio frequency post-stage circuit comprises an analog-to-Digital converter (A/D converter for short) and a Digital Variable Gain Amplifier (DVGA for short) besides the Gain processing circuit, and the Gain processing circuit, the A/D converter, the DVGA and the Gain control circuit are connected in sequence.
The A/D converter is used for carrying out analog-to-digital conversion on the third radio frequency signal output by the gain processing circuit to obtain a digital signal corresponding to the third radio frequency signal; the DVGA is used for outputting the intensity of the digital signal to the gain control circuit; the DVGA is further configured to gain amplify the digital signal so that the strength of the gain-amplified digital signal satisfies a preset condition.
In this embodiment, the gain processing circuit, the a/D converter, the DVGA, and the gain control circuit in the rf post-stage circuit are connected in sequence. The A/D converter in the radio frequency post-stage circuit receives the third radio frequency signal processed by the gain processing circuit, performs processing of converting an analog signal into a digital signal to obtain a digital signal corresponding to the third radio frequency signal, and the DVGA receives the digital signal and performs further gain amplification processing to enable the strength of the gain-amplified digital signal to meet a preset condition and outputs the strength of the digital signal to the gain control circuit.
Optionally, a mixer is further disposed between the gain processing circuit and the a/D converter.
The mixer is used for changing the frequency of the third radio frequency signal output by the gain processing circuit.
In this embodiment, the gain processing circuit, the mixer, the a/D converter, the DVGA, and the gain control circuit in the rf post-stage circuit are connected in sequence. The A/D converter in the radio frequency post-stage circuit receives the third radio frequency signal processed by the gain processing circuit, carries out analog signal conversion processing on the third radio frequency signal to obtain a digital signal corresponding to the third radio frequency signal, the mixer carries out frequency conversion processing on the digital signal to obtain an intermediate frequency digital signal, the DVGA receives the intermediate frequency digital signal and carries out further gain amplification processing on the intermediate frequency digital signal so that the strength of the gain-amplified digital signal meets a preset condition, and the strength of the digital signal is output to the gain control circuit.
Optionally, the radio frequency front stage circuit further includes: and the first filter is arranged at the input end of the second low-noise amplifier.
The first filter is used for filtering a first radio frequency signal received from the radio frequency antenna.
In this embodiment, the first filter and the second low noise amplifier in the rf front stage circuit are connected in sequence. The first filter of the radio frequency front-stage circuit filters out-of-band noise of a first radio frequency signal received from the radio frequency antenna, and the first radio frequency signal with the out-of-band noise filtered out is subjected to gain processing of the second low noise amplifier to obtain a second radio frequency signal. When the second low noise amplifier processes the first radio frequency signal, the second low noise amplifier may perform signal pass-through processing, signal amplification processing, or signal attenuation processing.
Optionally, the radio frequency front stage circuit further includes: and the second filter is arranged at the output end of the second low-noise amplifier.
The second filter is used for filtering the second radio frequency signal output by the second low noise amplifier.
In this embodiment, the first filter, the second low noise amplifier, and the second filter in the rf front stage circuit are connected in sequence. The first filter of the radio frequency front stage circuit filters out-of-band noise of a first radio frequency signal received from the radio frequency antenna, the first radio frequency signal with the out-of-band noise filtered out is subjected to gain processing of the second low noise amplifier to obtain a second radio frequency signal, and the second radio frequency signal is input into the radio frequency rear stage circuit after being subjected to processing of the second filter to filter system noise.
In this embodiment, the radio frequency front stage circuit includes a first filter, a second low noise amplifier, and a second low noise amplifier, where the first filter, the second low noise amplifier, and the second low noise amplifier are connected in sequence; the radio frequency post-stage circuit comprises a gain processing circuit, a mixer, an A/D converter, a DVGA and a gain control circuit, wherein the gain processing circuit, the mixer, the A/D converter, the DVGA and the gain control circuit are sequentially connected, a first filter of the radio frequency pre-stage circuit is used for filtering out-of-band noise of a first radio frequency signal received from a radio frequency antenna, the first radio frequency signal with the out-of-band noise filtered out is subjected to gain processing by a second low noise amplifier to obtain a second radio frequency signal, the second radio frequency signal is subjected to processing of filtering system noise by a second filter and then input into the gain processing circuit of the radio frequency post-stage circuit, the gain processing circuit of the radio frequency post-stage circuit is used for processing the second radio frequency signal to obtain a third radio frequency signal, the obtained third radio frequency signal is subjected to frequency conversion by the mixer, an analog signal of the A/D converter is converted into a digital signal, and then a digital signal corresponding to the third radio frequency signal, and after the gain amplification processing is carried out on the digital signal through the DVGA, outputting the digital signal to the gain control circuit so as to enable the strength of the gain-amplified digital signal to meet the preset condition, and sending the digital signal meeting the preset condition to the gain control circuit to obtain the strength of the digital signal. Thus, the strength of the digital signal after the processing is constant (kept within a certain range), and excellent processing of receiving radio frequency signals is realized.
Fig. 5 is a schematic structural diagram of another wireless receiver according to an embodiment of the present invention, and based on the embodiment shown in fig. 4, this embodiment describes in detail a possible structure of a radio frequency subsequent stage circuit.
The radio frequency back stage circuit further comprises: a gain control circuit and a Serial bus interface (SSBI) controller.
Wherein, the SSBI controller is respectively connected with the gain control circuit and the second low noise amplifier. The gain control circuit is used for determining the target working state of the second low noise amplifier according to the strength of the digital signal corresponding to the third radio frequency signal output by the gain processing circuit, and controlling the second low noise amplifier to work in the target working state through the SSBI controller.
One possible implementation manner, as shown in fig. 6, the gain control circuit includes: the device comprises a received signal estimation module, a gain finite state machine, a radio frequency NV parameter and an automatic control compensation control module. The received signal estimation module determines a corresponding RSSI value according to the strength of a digital signal corresponding to a third radio frequency signal output by the gain processing circuit, the gain finite state machine determines a target working state of the second low noise amplifier according to the strength of the digital signal corresponding to the third radio frequency signal output by the gain processing circuit, and controls the SSBI controller through a state word, so that the SSBI controller controls the second low noise amplifier to work in a working state corresponding to the current RSSI value, namely a target working state (a direct-connection state or an amplification state or an attenuation state) according to the control word. Illustratively, RSSI < -100dBm, then the second low noise amplifier is in the amplified state.
The radio frequency NV parameter is a non-volatile memory, which is a related radio frequency non-loss parameter used for controlling radio frequency power or radio frequency received signal strength, and includes a system gain of a target gain channel corresponding to a current RSSI, which is obtained by adding a current system gain of the target gain channel and a current gain corresponding to a target operating state of the second low noise amplifier.
Optionally, the gain control circuit is further configured to determine a target gain channel of the gain processing circuit according to the strength of the digital signal, determine a target operating state corresponding to each first low noise amplifier in the target gain channel according to a system gain of the target gain channel and a gain corresponding to a target operating state of the second low noise amplifier, and control each first low noise amplifier to operate in the corresponding target operating state.
According to a possible implementation manner, a received signal estimation module in the gain control circuit determines a corresponding RSSI value according to the strength of a digital signal corresponding to a third radio frequency signal output by the gain processing circuit, and the gain finite state machine further determines a target gain channel of the gain processing circuit according to the RSSI value corresponding to the strength of the digital signal. Illustratively, the gain finite state machine determines the target gain channel of the gain processing circuit according to the corresponding relationship between the RSSI value and the target gain channel in table 1 or table 2. After the target gain channel is determined, the target working state corresponding to each first low noise amplifier in the target gain channel is determined according to the four-stage low noise amplifier gain switching diagram shown in fig. 7, and the radio frequency NV parameter is controlled and called to enable each first low noise amplifier to work in the corresponding working state. And meanwhile, the control compensation control module controls the DVGA to perform gain compensation on the digital signal, so that the automatic control of the system gain is completed.
The selection of the target gain channel and the determination of the target operating states of the first and second low noise amplifiers in the above embodiments are explained by way of example below.
For example, for a signal strength scenario, such as the signal scenario in table 1, the high gain channel and the low gain channel are enabled simultaneously. Table 1 shows the mapping relationship between the target gain channel and the second lna for different signal scenarios. As shown in table 1, the system can perform gain adaptive adjustment according to the table, that is, according to the signal strength state monitored in real time, the state control and switching of the first low noise amplifier and the second low noise amplifier are performed in real time, and the specific value of the RSSI of the signal scene in the table can be adjusted according to the working state of the actual system. For example: RSSI < -100dBm, the working state of the second low noise amplifier is known to be a gain state according to the table 1, and the target gain channel is a high gain channel. And then, determining the respective target working states of the first low-noise amplifiers in the target gain channel according to the four-stage low-noise amplifier gain switching diagram shown in fig. 7, and controlling and calling the radio frequency NV parameter to enable the first low-noise amplifiers to work in the respective corresponding working states, thereby completing automatic control of the system gain. For example, the RSSI gradually increases from less than-100 dBm to-75 dBm, and the operation state of each first lna of the target gain channel is switched from a four-stage amplification state to a three-stage amplification state.
TABLE 1
For another signal strength scenario, such as the signal scenario shown in table 2, only one of the high gain channel or the low gain channel is enabled. Table 2 shows the mapping relationship between the target gain channel and the second lna for a different signal scenario. As shown in table 2, the system can perform adaptive gain adjustment according to the table, and the specific RSSI value of the signal scene in the table can be adjusted according to the working state of the actual system. For example: RSSI < -85dBm, the working state of the second low noise amplifier can be known to be a gain state according to the table 2, and the target gain channel can be any one of a high gain channel or a low gain channel. And then, determining the respective target working states of the first low-noise amplifiers in the target gain channel according to the four-stage low-noise amplifier gain switching diagram shown in fig. 7, and controlling and calling the radio frequency NV parameter to enable the first low-noise amplifiers to work in the respective corresponding working states, thereby completing automatic control of the system gain. For example, the RSSI gradually increases from less than-85 dBm to-75 dBm, and the operation state of each first lna of the target gain channel switches from a four-stage gain state to a three-stage gain state.
TABLE 2
Further, the selection of the target gain channel and the calculation of the gain value of the target gain channel included in the rf NV parameters are described in detail by the following examples.
In order to ensure the smoothness of the gain switching of the whole system, an effective method is to adjust the gains of the second low noise amplifier and the target gain channel, and ensure that the total gain of the system is matched with the gain of the target gain channel, and some errors can be allowed, where g represents a gain error, and generally g is 5dB, that is, the gain error does not bring a large influence on the whole received signal processing within a range of 5dB, that is, the system gain of the target gain channel and the gain corresponding to the target working state of the second low noise amplifier are added, the system gain of the target gain channel corresponding to the current RSSI is calculated, and the calculated system gain of the target gain channel corresponding to the current RSSI is stored in the radio frequency NV parameter for direct calling when the gain is adaptively adjusted.
Fig. 8A is a schematic diagram of a gain matching logic according to an embodiment of the present invention; FIG. 8B is a schematic diagram of another gain matching logic according to an embodiment of the present invention; FIG. 8C is a schematic logic diagram illustrating another gain matching scheme according to an embodiment of the present invention; fig. 9A is a state control switching diagram of a finite state machine according to an embodiment of the present invention; fig. 9B is a state control switching diagram of another finite state machine according to an embodiment of the present invention.
One possible implementation is: the target gain channel is a low gain channel as shown in fig. 8A, or the target gain channel is a high gain channel as shown in fig. 8B. In both cases, the overall gain of the system is formulated as either equation 1 or equation 2 below.
Low gain channel gain:
GSLi’＝∑ai*ALi+bi*KLi+ci*GLi＝GSLi±g≈GSLi(formula 1)
Wherein, i represents the ith-stage first low noise amplifier, and the value can be 1, 2, 3 or 4. ai, bi and ci represent the ith stage, and the values can be 0,1, where 0 represents that the operating state of the first low noise amplifier is in a direct-on state, and 1 represents that the operating state of the first low noise amplifier is in an amplification state or an attenuation state. ALi represents the gain value of the i-th stage first low noise amplifier in the attenuation state in the low gain channel, KLi represents the gain value of the i-th stage first low noise amplifier in the direct-on state in the low gain channel, and GLi represents the gain value of the i-th stage first low noise amplifier in the amplification state in the low gain channel. The gain error for g for a system is 5 by default.
High gain channel gain:
GSHi’＝∑ai*AHi+bi*KHi+ci*GHi＝GSHi±g≈GSLi(formula 2)
Wherein, i represents the ith-stage first low noise amplifier, and the value can be 1, 2, 3 or 4. a isi,bi,ciThe state of the ith stage is shown, the value can be 0,1, 0 represents that the working state of the first low noise amplifier is in a direct-on state, and 1 represents that the working state of the first low noise amplifier is in an amplification state or an attenuation state. AH (advanced Shell preparation)iThe gain value KH of the i-th low noise amplifier in the high gain channeliIndicating the gain value, GH, of the i-th stage of the first low noise amplifier in the high gain path in the on stateiAnd the gain value of the ith stage of the first low noise amplifier in the high gain channel in the amplifying state is shown. The gain error for g for a system is 5 by default.
For example, table 3 is a mapping table of eight-level gain level switching provided in the embodiment of the present invention. It can be seen from table 3 that the target gain channel is a high gain channel, that is, the target gain channel is switched to the high gain channel by the adaptive gain adjustment, and the gain level of each first low noise amplifier is: GH1, GH2, GH4, GH5, GH6, GH7, GH6 and GH 6. Meanwhile, as can be seen from table 3, the gain level of the second lna is: g2, G2, G2, G2, G2, G2, G1, G0. The operating state of each second low noise amplifier is state 0: attenuation state, attenuation-4 dB; state 1: a direct-on state, attenuation of 0 dB; state 2: gain state, gain 13 dB.
TABLE 3
The second low noise amplifiers are all in amplification mode in the first six stages, the seventh stage in pass-through mode and the eighth stage in attenuation mode. Therefore, the second low-noise amplifier is always in an amplification state under the scene from weak signals to strong signals, the working noise coefficient of the whole system is the minimum according to the cascade theory of the noise coefficient, and the receiving sensitivity is excellent; under a stronger signal scene, the second low noise amplifier is in a direct-through mode, so that the receiver is ensured not to be saturated under strong signal input; under an extremely strong signal scene, the second low noise amplifier is in an attenuation mode, and the maximum dynamic range of the receiver is improved.
By combining the gain states of the second low noise amplifier and the gain states of the high gain path, a final gain library is achieved, and the state switching of fig. 9A can be achieved as long as the obedient gain linearly increases from low to high according to the signal strength, while the gain error of the recombined system gain and the system gain after expansion remains within the range of gdB.
Another possible implementation: as shown in fig. 8C, the target gain channels are a high gain channel and a low gain channel, and in this case, the gain formula of the system is as follows in formula 3.
GSi’＝∑(ai*ALi+bi*KLi+ci*GLi)+∑(si*AHi+ti*KHi+ri*GHi)＝GSi±g≈GSi
(formula 3)
Wherein, i represents the ith-stage first low noise amplifier, and the value can be 1, 2, 3 or 4. a isi,bi,ci,si,ti,riThe state of the ith stage is shown, the value can be 0,1, 0 represents that the working state of the first low noise amplifier is in a direct-on state, and 1 represents that the working state of the first low noise amplifier is in an amplification state or an attenuation state. ALiIndicating the ith stage in the low gain pathGain value, KL, of the first low noise amplifier in the attenuated stateiIndicating the gain value, GL, of the i-th stage of the first low noise amplifier in the low gain path in the on stateiThe gain value of the ith stage of the first low noise amplifier in the low gain channel in the amplifying state is represented; AH (advanced Shell preparation)iThe gain value KH of the i-th low noise amplifier in the high gain channeliIndicating the gain value, GH, of the i-th stage of the first low noise amplifier in the high gain path in the on stateiAnd the gain value of the ith stage of the first low noise amplifier in the high gain channel in the amplifying state is shown. The gain error for g for a system is 5 by default.
For example, table 4 is a mapping table for another eight-level gain level switching according to the embodiment of the present invention. As can be seen from table 4, the target gain channel is a high gain channel and a low gain channel, that is, the gain is adaptively adjusted so that the target gain channel is switched to the high gain channel and the low gain channel, and the gain state of each second lna is state 0: attenuation state, attenuation-4 dB; state 1: a direct-on state, attenuation of 0 dB; state 2: gain state, gain 13 dB.
TABLE 4
By combining the gain state of the second low noise amplifier and the gain states of the high and low gain channels, a final gain library is realized, and the state switching of fig. 9B can be realized as long as the obedient gain linearly increases from low to high according to the signal strength, while the gain error of the recombined system gain and the system gain after expansion remains within the range of gdB.
In this embodiment, the wireless receiver includes a radio frequency front stage circuit and a radio frequency back stage circuit. The radio frequency front-stage circuit comprises a first filter, a second low-noise amplifier and a second low-noise amplifier, wherein the first filter, the second low-noise amplifier and the second low-noise amplifier are sequentially connected; the radio frequency post-stage circuit comprises a gain processing circuit, a mixer, an A/D converter, a DVGA and a gain control circuit, wherein the gain processing circuit, the mixer, the A/D converter, the DVGA and the gain control circuit are connected in sequence. A received signal estimation module in the gain control circuit evaluates the strength of a digital signal to obtain an RSSI value, a gain finite state machine is controlled to determine a target working state of the second low-noise amplifier according to the RSSI value, and an SSBI controller is controlled through a state word and controls the second low-noise amplifier to work in a working state corresponding to the current strength of the digital signal, namely a target working state (a direct-connection state or an amplification state or an attenuation state) according to the control word. The gain finite state machine also determines a target gain channel of the gain processing circuit according to the RSSI value, controls and calls a radio frequency NV parameter to control the gain processing circuit to be in the target gain channel, and enables each first low noise amplifier to be in a target working state (a direct-on state, an amplification state or an attenuation state), so that the wireless receiver can continuously and automatically adjust the gain control of the system according to the strength of the digital signal, the whole process of the gain automatic control of the wireless receiver is realized, the wireless receiver can receive and process radio frequency signals with different signal strengths, and the wireless receiver can be applied to various different scenes.
Fig. 10 is a wireless device according to an embodiment of the present invention, where as shown in fig. 10, the wireless device includes a radio frequency antenna and a wireless receiver according to any of the embodiments.
The radio frequency front-stage circuit is connected with the radio frequency antenna, and the radio frequency back-stage circuit may be disposed on the radio frequency chip or not, which is not limited in the embodiments of the present application.
It should be noted that the wireless device of this embodiment may be any wireless device having a radio frequency receiving function, and fig. 10 only illustrates a mobile phone as an example.
In this embodiment, a possible structure diagram is shown in fig. 11, where the radio frequency front-stage circuit includes a first filter, a second low noise amplifier, and a second filter, the first filter is disposed at an input end of the second low noise amplifier (near a side of the radio frequency antenna), the second filter is disposed at an output end of the second low noise amplifier, and an output end of the second filter is connected to an input end of the radio frequency rear-stage circuit (the second filter may be disposed near the radio frequency rear-stage circuit).
The wireless receiver can be used in different wireless communication products, and according to different application products, the wireless receiver of the embodiment can meet the requirements of different scenes through automatic gain control.
The following are exemplified:
scene 1: when the radio frequency rear-stage circuit is very close to the antenna end (for example, less than 15mm), the second low-noise amplifier can be in a through state through the control of the gain control circuit, and the radio frequency rear-stage circuit can meet the requirement by selecting a channel with the lowest gain.
Scene 2: when some distance (for example, 20-40mm) exists between the radio frequency rear-stage circuit and the antenna, the second low-noise amplifier can be in a through state under the control of the gain control circuit, and the radio frequency rear-stage circuit can meet the requirement by selecting a highest gain channel.
Scene 3: when a longer distance (for example, 50-60mm) exists between the radio frequency rear-stage circuit and the antenna, the second low-noise amplifier can be in an amplification state through the control of the gain control circuit, the radio frequency rear-stage circuit selects a low-gain channel, and the requirement can be met through the remapping of the gain.
Scene 4: when a long distance (for example, greater than 70mm) exists between the radio frequency rear-stage circuit and the antenna, the second low-noise amplifier can be in an amplification state under the control of the gain control circuit, and the radio frequency rear-stage circuit selects a high-gain channel and can meet the requirement through gain remapping.
The above scenarios 1 to 4 are only a few possible scenarios, and other more scenarios may exist in practical application, which is not limited in the embodiment of the present invention.
In this embodiment, the wireless device is configured to implement the automatic gain control process in any one of the above embodiments, and automatically adjust the gains of the radio frequency front-stage circuit and the radio frequency rear-stage circuit according to the strength of the signal received by the radio frequency antenna, so as to ensure that the wireless device can perform adaptive state switching according to a practical application scenario, that is, the wireless device under a weak signal has excellent receiving sensitivity, and the wireless device under a strong signal does not easily enter a saturation region, and finally, the wireless device can receive and process a wider range of signals, and is suitable for various different scenarios.
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; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A wireless receiver, comprising: a radio frequency front-stage circuit and a radio frequency rear-stage circuit;
the radio frequency post-stage circuit comprises a gain processing circuit, the gain processing circuit comprises a plurality of gain channels, and the gains corresponding to the gain channels are different;
the radio frequency front stage circuit is used for receiving a first radio frequency signal from a radio frequency antenna and processing the first radio frequency signal to obtain a second radio frequency signal; the radio frequency post-stage circuit is used for processing the second radio frequency signal through one or more gain channels in the gain processing circuit to obtain a third radio frequency signal, so that the strength of a digital signal obtained according to the third radio frequency signal meets a preset condition.
2. The wireless receiver of claim 1, wherein each of the gain channels comprises a plurality of first low noise amplifiers arranged in cascade, each of the first low noise amplifiers comprising three operating states: a direct-on state, an amplified state, and an attenuated state.
3. The wireless receiver of claim 2, wherein the rf pre-stage circuit includes a second low noise amplifier, the second low noise amplifier including three operating states: a direct-on state, an amplified state, and an attenuated state.
4. The wireless receiver of claim 3, wherein the radio frequency back-stage circuit further comprises: the SSBI controller is respectively connected with the gain control circuit, the gain processing circuit and the second low noise amplifier;
the gain control circuit is used for determining a target working state of the second low noise amplifier according to the strength of the digital signal corresponding to the third radio frequency signal output by the gain processing circuit, and controlling the second low noise amplifier to work in the target working state through an SSBI controller.
5. The wireless receiver of claim 4,
the gain control circuit is further configured to determine a target gain channel of the gain processing circuit according to the strength of the digital signal, determine a target operating state corresponding to each first low noise amplifier in the target gain channel according to a system gain of the target gain channel and a gain corresponding to a target operating state of the second low noise amplifier, and control each first low noise amplifier to operate in the corresponding target operating state.
6. The wireless receiver of claim 5, wherein the radio frequency back-stage circuit further comprises: the gain processing circuit, the A/D, the DVGA and the gain control circuit are connected in sequence;
the A/D is used for carrying out analog-to-digital conversion on the third radio frequency signal output by the gain processing circuit to obtain a digital signal corresponding to the third radio frequency signal;
the DVGA is used for outputting the strength of the digital signal to the gain control circuit;
the DVGA is further configured to gain amplify the digital signal so that the strength of the gain-amplified digital signal satisfies the preset condition.
7. The wireless receiver of claim 6, wherein a mixer is further disposed between the gain processing circuit and the A/D, and the mixer is configured to change the frequency of the third RF signal output by the gain processing circuit.
8. The wireless receiver of any of claims 3 to 7, wherein the RF front-end stage further comprises: a first filter disposed at an input of the second low noise amplifier;
the first filter is used for filtering the first radio frequency signal received from the radio frequency antenna.
9. The wireless receiver of claim 8, wherein the rf pre-stage circuit further comprises: a second filter disposed at an output of the second low noise amplifier;
the second filter is used for filtering the second radio frequency signal output by the second low noise amplifier.
10. A wireless device comprising a radio frequency antenna and a wireless receiver according to any one of claims 1 to 9;
the radio frequency front stage circuit is connected with the radio frequency antenna.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021115453A1 (en) * | 2019-12-13 | 2021-06-17 | 上海摩软通讯技术有限公司 | Wireless receiver and wireless device |
| WO2022089358A1 (en) * | 2020-10-30 | 2022-05-05 | 展讯通信(天津)有限公司 | Adjustment method and system for receiving link gain, and intelligent terminal |
| CN116073847A (en) * | 2021-10-29 | 2023-05-05 | 寰宇智芯科技(成都)有限公司 | Controller with wireless transmission interface |
| CN117220699A (en) * | 2023-11-09 | 2023-12-12 | 荣耀终端有限公司 | Signal enhancement circuit, electronic equipment, system and method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113890642B (en) * | 2021-10-09 | 2023-12-05 | 中信科移动通信技术股份有限公司 | Method and device for checking communication system receiver |
Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0701332A1 (en) * | 1994-09-09 | 1996-03-13 | Kabushiki Kaisha Toshiba | Variable gain circuit and radio apparatus using the same |
| CN1389986A (en) * | 1995-08-31 | 2003-01-08 | 索尼公司 | Transmitting/receiving apparatus of regulating gain of transmitting/receiving signal, and method thereof |
| CN103208971A (en) * | 2012-01-13 | 2013-07-17 | 上海创远仪器技术股份有限公司 | Controllable gain circuit |
| CN103516379A (en) * | 2012-06-28 | 2014-01-15 | 国基电子（上海）有限公司 | Wireless communication module |
| CN103580704A (en) * | 2012-07-25 | 2014-02-12 | 中国科学院微电子研究所 | Receiver device adopting automatic gain control and method for controlling receiver by means of automatic gain |
| US20140197886A1 (en) * | 2013-01-17 | 2014-07-17 | Qualcomm Incorporated | Amplifier with switchable common gate gain buffer |
| CN204044354U (en) * | 2014-06-19 | 2014-12-24 | 成都九洲迪飞科技有限责任公司 | High receiving sensitivity broadband receiver |
| CN105024769A (en) * | 2015-06-25 | 2015-11-04 | 大唐移动通信设备有限公司 | Monitoring device |
| CN105120512A (en) * | 2015-07-03 | 2015-12-02 | 广州飞米电子科技有限公司 | Signal reception method and apparatus |
| CN105490648A (en) * | 2016-01-08 | 2016-04-13 | 合肥雷诚微电子有限公司 | Multi-mode power amplifier and application thereof |
| CN106341145A (en) * | 2015-07-07 | 2017-01-18 | 中兴通讯股份有限公司 | Signal receiving method and device |
| CN108111184A (en) * | 2016-11-23 | 2018-06-01 | 北京遥感设备研究所 | A kind of ultra wide band compact radio frequency component |
| CN108303587A (en) * | 2017-01-12 | 2018-07-20 | 北京普源精电科技有限公司 | Improve the spectrum analyzer that bottom is made an uproar |
| CN109088604A (en) * | 2018-08-06 | 2018-12-25 | 上海华虹宏力半导体制造有限公司 | A kind of variable gain low-noise amplifier |
| CN109167609A (en) * | 2018-10-17 | 2019-01-08 | 北京遥感设备研究所 | A kind of miniature ultra wide band receiving unit based on multifunction chip |
| CN110113060A (en) * | 2019-04-22 | 2019-08-09 | (株)韩国一诺仪器株式会社 | A kind of frequency spectrum receiving unit |
| CN110224770A (en) * | 2019-06-15 | 2019-09-10 | 南京巴乌克智能科技有限公司 | A kind of method and apparatus improving wireless device receiving sensitivity |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7098733B1 (en) * | 2004-07-21 | 2006-08-29 | Linear Technology Corporation | Methods and circuits for selectable gain amplification by subtracting gains |
| US9748993B2 (en) * | 2015-09-08 | 2017-08-29 | Mediatek Inc. | Radio frequency receiver front-end with gain control capability as well as improved impedance matching control capability |
| CN108983134B (en) * | 2018-05-31 | 2020-07-03 | 上海东软医疗科技有限公司 | Signal receiving channel calibration method and magnetic resonance calibration system |
| CN111162809B (en) * | 2019-12-13 | 2022-04-15 | 西安易朴通讯技术有限公司 | Wireless receiver and wireless device |
-
2019
- 2019-12-13 CN CN201911279284.1A patent/CN111162809B/en active Active
-
2020
- 2020-12-11 WO PCT/CN2020/135917 patent/WO2021115453A1/en active Application Filing
Patent Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0701332A1 (en) * | 1994-09-09 | 1996-03-13 | Kabushiki Kaisha Toshiba | Variable gain circuit and radio apparatus using the same |
| CN1389986A (en) * | 1995-08-31 | 2003-01-08 | 索尼公司 | Transmitting/receiving apparatus of regulating gain of transmitting/receiving signal, and method thereof |
| CN103208971A (en) * | 2012-01-13 | 2013-07-17 | 上海创远仪器技术股份有限公司 | Controllable gain circuit |
| CN103516379A (en) * | 2012-06-28 | 2014-01-15 | 国基电子（上海）有限公司 | Wireless communication module |
| CN103580704A (en) * | 2012-07-25 | 2014-02-12 | 中国科学院微电子研究所 | Receiver device adopting automatic gain control and method for controlling receiver by means of automatic gain |
| US20140197886A1 (en) * | 2013-01-17 | 2014-07-17 | Qualcomm Incorporated | Amplifier with switchable common gate gain buffer |
| CN204044354U (en) * | 2014-06-19 | 2014-12-24 | 成都九洲迪飞科技有限责任公司 | High receiving sensitivity broadband receiver |
| CN105024769A (en) * | 2015-06-25 | 2015-11-04 | 大唐移动通信设备有限公司 | Monitoring device |
| CN105120512A (en) * | 2015-07-03 | 2015-12-02 | 广州飞米电子科技有限公司 | Signal reception method and apparatus |
| CN106341145A (en) * | 2015-07-07 | 2017-01-18 | 中兴通讯股份有限公司 | Signal receiving method and device |
| CN105490648A (en) * | 2016-01-08 | 2016-04-13 | 合肥雷诚微电子有限公司 | Multi-mode power amplifier and application thereof |
| CN108111184A (en) * | 2016-11-23 | 2018-06-01 | 北京遥感设备研究所 | A kind of ultra wide band compact radio frequency component |
| CN108303587A (en) * | 2017-01-12 | 2018-07-20 | 北京普源精电科技有限公司 | Improve the spectrum analyzer that bottom is made an uproar |
| CN109088604A (en) * | 2018-08-06 | 2018-12-25 | 上海华虹宏力半导体制造有限公司 | A kind of variable gain low-noise amplifier |
| CN109167609A (en) * | 2018-10-17 | 2019-01-08 | 北京遥感设备研究所 | A kind of miniature ultra wide band receiving unit based on multifunction chip |
| CN110113060A (en) * | 2019-04-22 | 2019-08-09 | (株)韩国一诺仪器株式会社 | A kind of frequency spectrum receiving unit |
| CN110224770A (en) * | 2019-06-15 | 2019-09-10 | 南京巴乌克智能科技有限公司 | A kind of method and apparatus improving wireless device receiving sensitivity |
Non-Patent Citations (1)
| Title |
|---|
| 白春风: "短距离无线接收机中自动增益控制电路的研究与实现", 《中国博士学位论文全文数据库信息科技辑》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021115453A1 (en) * | 2019-12-13 | 2021-06-17 | 上海摩软通讯技术有限公司 | Wireless receiver and wireless device |
| WO2022089358A1 (en) * | 2020-10-30 | 2022-05-05 | 展讯通信(天津)有限公司 | Adjustment method and system for receiving link gain, and intelligent terminal |
| CN116073847A (en) * | 2021-10-29 | 2023-05-05 | 寰宇智芯科技(成都)有限公司 | Controller with wireless transmission interface |
| CN117220699A (en) * | 2023-11-09 | 2023-12-12 | 荣耀终端有限公司 | Signal enhancement circuit, electronic equipment, system and method |
| CN117220699B (en) * | 2023-11-09 | 2024-04-02 | 荣耀终端有限公司 | Signal enhancement circuit, electronic equipment, system and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111162809B (en) | 2022-04-15 |
| WO2021115453A1 (en) | 2021-06-17 |
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