CN104065393B - Signal transmission or reception circuit and signal transmission or reception method - Google Patents

Abstract

The present invention relates to a signal transmitting or receiving circuit and a signal transmitting or receiving method, the signal receiving circuit comprising: a receiving path for converting a first analog radio frequency input signal into a digital intermediate frequency input signal, wherein the first analog radio frequency input signal comprises a first signal component and a second signal component which conform to different wireless transmission standards; a first and a second digital down converter for processing the digital intermediate frequency input to obtain a first digital baseband signal and a second digital baseband signal corresponding to the first signal component and the second signal component, respectively; and a first baseband signal processing module and a second baseband signal processing module, which process the first digital baseband signal and the second digital baseband signal according to the different wireless transmission standards, respectively.

Description

Signal transmission or reception circuit and signal transmission or reception method

technical field

The present invention relates to a signal transmission or reception circuit and a signal transmission or reception method, and particularly relates to a signal transmission or reception circuit and a signal transmission or reception method using a single signal transmission and reception circuit to process signals of different wireless transmission standards.

Background technique

In the known technology, signals under different wireless transmission standards are usually processed by an independent signal receiving circuit (signal receiving circuit). For example, a signal conforming to the Wifi standard will be processed by a set of transmitting and receiving circuits, while a signal conforming to the Bluetooth standard will be processed by another set of signal transmitting and receiving circuits. However, using independent signal transmitting and receiving circuits to receive signals of these different standards not only occupies a larger circuit area, but also consumes more power. Moreover, under the trend of thinning electronic devices, the distance between two different signal transmitting and receiving circuits is reduced, and the processed signals are likely to interfere with each other.

Contents of the invention

An object of the present invention is to provide a single set of circuits for processing a signal receiving circuit, a signal transmitting circuit and a signal transmitting and receiving circuit conforming to different wireless transmission standards.

Another object of the present invention is to provide a signal receiving method, a signal transmitting method and a signal transmitting and receiving method that can use a single set of circuits to process different wireless transmission standards.

An embodiment of the present invention discloses a signal receiving circuit, including: a receiving path for converting a first analog radio frequency input signal into a digital intermediate frequency input signal and outputting the digital intermediate frequency input signal, wherein the first analog radio frequency The input signal includes a first signal component and a second signal component, the first signal component complies with a first wireless transmission standard and the second signal component complies with a second wireless transmission standard; a first digital down converter, Receive the digital intermediate frequency input signal, obtain a first digital baseband signal corresponding to the first signal component after processing; a second digital down converter, receive the digital intermediate frequency input signal, obtain the corresponding second digital base frequency signal after processing A second digital baseband signal of the signal component; a first baseband signal processing module, which processes the first digital baseband signal with the first wireless transmission standard; and a second baseband signal processing module, which uses the second The wireless transmission standard processes the second digital baseband signal.

Another embodiment of the present invention discloses a signal transmission circuit, including: a first baseband signal processing module, used to output a first digital baseband signal processed by a first wireless transmission standard; a second baseband signal A frequency signal processing module is used to output a second digital baseband signal processed by a second wireless transmission standard; a first digital up-converter receives the first digital baseband signal to generate a first digital intermediate frequency signal ; a second digital up-converter, receiving the second digital baseband signal, and generating a second digital intermediate frequency signal after processing; and a transmission path, converting the first digital intermediate frequency signal into a first analog radio frequency output signal, Or convert the second digital intermediate frequency signal into a second analog radio frequency output signal, and output the first analog radio frequency output signal or the second analog radio frequency output signal.

Yet another embodiment of the present invention discloses a signal receiving circuit, including: a receiving path for converting a first analog radio frequency input signal into a digital intermediate frequency input signal and outputting the digital intermediate frequency input signal, wherein the first analog radio frequency The input signal includes a plurality of signal components, and the signal components conform to at least one wireless transmission standard; a digital down-conversion module, including M digital down-converters, is used to receive the digital intermediate frequency input signal, and obtain corresponding to these digital intermediate frequency input signals after processing M digital baseband signals of signal components, wherein the M is a positive integer greater than or equal to 2; N baseband signal processing modules process the digital baseband signals with the corresponding wireless transmission standard, wherein the N is greater than or a positive integer equal to 2. The digital down converter is connected to the baseband signal processing module in at least one of the following connection modes: one of the digital down converter is connected to at least one of the baseband signal processing modules; and one of the baseband signal processing modules is connected to at least one a digital down converter.

Yet another embodiment of the present invention discloses a signal transmission circuit, comprising: N baseband signal processing modules, configured to output N digital baseband signals according to at least one wireless transmission standard, wherein N is a positive number greater than or equal to 2 Integer; a digital up-conversion module, including M digital up-converters, used to receive the digital baseband signal, and generate M digital intermediate frequency signals after processing, wherein the M is a positive integer greater than or equal to 2; a transmission path , converting the digital intermediate frequency signals into analog radio frequency output signals respectively, and outputting the analog radio frequency output signals. Wherein the digital up-converter is connected to the baseband signal processing module in at least one of the following connection ways: one of the digital upconverters is connected to at least one of the baseband signal processing modules; and one of the baseband signal processing modules Connect at least one of the digital upconverters.

Combining the aforementioned signal transmission circuit and signal receiving circuit, a signal transmission and reception circuit can be obtained, and the first baseband signal processing module and the second baseband signal processing module in the signal transmission and reception circuit can receive signals or transmit signals from the receiving path to the delivery path. Other components can be derived from the aforementioned circuits, so details will not be repeated here.

According to the aforementioned signal transmission circuit, signal reception circuit and signal transmission and reception circuit, a signal transmission method, a signal reception method and a signal transmission and reception method can be obtained. Since the steps of these methods can be deduced from the aforementioned circuits, they are not repeated here.

According to the foregoing embodiments, the same circuit can be used to transmit signals conforming to different wireless transmission standards, thereby avoiding the problems in the prior art.

Description of drawings

FIG. 1A illustrates a signal receiving circuit according to an embodiment of the invention.

FIG. 1B shows an extension of the embodiment shown in FIG. 1A .

FIG. 2A , FIG. 2B and FIG. 2C are schematic diagrams illustrating the operation of the signal receiving circuit shown in FIG. 1A .

FIG. 3 illustrates a signal receiving circuit according to another embodiment of the present invention.

FIG. 4 illustrates an example of the detailed circuit of the signal receiving circuit shown in FIG. 1A .

FIG. 5A illustrates a signal transmission circuit according to an embodiment of the present invention.

FIG. 5B shows an extension of the embodiment shown in FIG. 5A.

FIG. 6 shows an example of the detailed circuit of the signal transmission circuit shown in FIG. 5A .

FIG. 7A illustrates a signal transmitting and receiving circuit according to an embodiment of the present invention.

FIG. 7B shows an extension of the embodiment shown in FIG. 7A.

FIG. 8 illustrates a signal receiving method according to an embodiment of the present invention.

FIG. 9 illustrates a signal transmission method according to an embodiment of the present invention.

FIG. 10 illustrates a method for signal transmission and reception according to an embodiment of the present invention.

Symbol Description

100, 120, 300 signal receiving circuit

101, 701 receiving path

102, 302, 502 antennas

103, 703 first digital down converter

105, 705 second digital down converter

107, 507, 707 first baseband signal processing module

109, 509, 709 second baseband signal processing module

121 digital down conversion module

304 multiplexer

306 control unit

401, 601 amplifier

403, 409, 413, 603, 613, 617 Mixer

405, 411, 415 downsampling filters

407 Analog to Digital Converter

500, 520 signal transmission circuit

501 delivery path

503, 711 first digital up converter

505, 713 second digital up converter

521 digital up conversion module

605, 611, 615 upsampling filters

607 Digital to Analog Converter

700 signal transmission and reception circuit

715 transmission path

717 carrier generator

719 duplexer

721 sampling conversion module

B ₁ -BN baseband signal processing module

D ₁ -D _M , D ₁ -D _M1 Digital Down Converter

U ₁ -U _M , U ₁ -U _M2 digital up converter

detailed description

FIG. 1A illustrates a signal receiving circuit 100 according to an embodiment of the present invention. As shown in Figure 1A, the signal receiving circuit 100 includes a receiving path 101, a first digital down converter 103, a second digital down converter 105, a first baseband signal processing module 107 and a second baseband Signal processing module 109 . The receiving path 101 is used for converting a first analog radio frequency input signal ARFI ₁ into a digital intermediate frequency input signal DIFI. The first analog radio frequency input signal ARFI ₁ includes a first signal component and a second signal component. The first signal component conforms to a first wireless transmission standard (such as Wifi) and the second signal component conforms to a second wireless transmission standard (such as Bluetooth). The first digital down converter 103 receives the digital IF input signal DIFI and performs filtering and down-sampling operations on the digital IF input signal DIFI to obtain the first signal component as a first digital baseband signal DBFS ₁ . The second digital down-converter 105 receives the digital IF input signal DIFI and performs filtering and down-sampling operations on the digital IF input signal DIFI to obtain a second signal component as a second digital baseband signal DBFS ₂ . The first baseband signal processing module 107 processes the first digital baseband signal DBFS ₁ with the first wireless transmission standard, and the second baseband signal processing module 109 processes the second digital baseband signal DBFS ₂ with the second wireless transmission standard.

Please refer to FIG. 1B , which illustrates an extended example of the embodiment shown in FIG. 1A . As shown in FIG. 1B , the signal receiving circuit 120 also includes a receiving path 101 , and further includes a digital down conversion module 121 and N baseband signal processing modules B ₁ -B _N . The digital down conversion module 121 includes M digital down converters D ₁ - D _M . M and N may be the same positive integer greater than 2, or different positive integers greater than 2. In this example, the first analog radio frequency input signal ARFI ₁ includes a plurality of signal components, and these signal components conform to at least one wireless transmission standard. The first analog radio frequency input signal ARFI ₁ is converted into a digital intermediate frequency input signal DIFI and input to the digital down converters D ₁ -D _M for filtering and down-sampling. It will be sent to at least one of the baseband signal processing modules B ₁ -B _N. The digital down converters D _1- D _M and the baseband signal processing modules B _1- B _N can be in a one-to-one relationship, that is, each digital down converter D _1- D _M is only coupled to the baseband signal processing module at most One of the modules B _1- B _N , and different digital down converters are coupled to different baseband signal processing modules B _1- B _N . The digital down converters D _1- D _M and the baseband signal processing modules B _1- B _N can also be in a many-to-many relationship, that is, each digital down converter D _1- D _M can be coupled to the baseband signal processing Multiple of modules B _1- B _N. Alternatively, each baseband signal processing module B ₁ -B _N may be coupled to a plurality of digital down converters D ₁ -D _M. The baseband signal processing modules B1 _{- BN} can respectively use N different wireless transmission standards, or two baseband signal processing modules can use the same baseband signal processing module. With such a structure, the connection mode of the digital down-converter and the baseband signal processing module can be freely adjusted according to the design requirements, and the wireless transmission standards to be used by the baseband signal processing module can be arbitrarily set. The applicability of the signal receiving circuit. However, please note that although FIG. 1B is described based on FIG. 1A , the embodiment in FIG. 1B can also be used in the embodiments in FIG. 3 , FIG. 4 and FIG. 7A . And the embodiment of FIG. 1B can also use the structure of FIG. 3 and FIG. 4 .

FIG. 2A , FIG. 2B and FIG. 2C are schematic diagrams illustrating the operation of the signal receiving circuit 100 shown in FIG. 1A . As mentioned above, the first analog RF input signal ARFI ₁ has a first signal component and a second signal component. Therefore, the digital IF input signal DIFI obtained by processing the first analog RF input signal ARFI ₁ has a first signal component S ₁ and a second signal component S ₂ as shown in FIG. 2A . After the digital intermediate frequency input signal DIFI is down-sampled and filtered by the first digital down-converter 103 and the second digital down-converter 105, the first digital baseband signal DBFS ₁ shown in FIG. 2B and FIG. 2C can be obtained respectively. and the second digital baseband signal DBFS ₂ . That is to say, when the signal receiving circuit according to the embodiment of the present invention receives a signal, it will receive signal components conforming to different wireless transmission standards (such as the first signal component S ₁ and the second signal component S of different frequency bands in Fig. 2A ). ₂ ). Then different digital down converters will perform different filtering actions, so the same digital intermediate frequency input signal DIFI can generate signal components that meet a single wireless transmission standard after being processed by different digital down converters, without appearing Signal components under other wireless transmission standards.

FIG. 3 illustrates a signal receiving circuit 300 according to another embodiment of the present invention. In the embodiment of FIG. 1A, the signal receiving circuit 100 only includes a single antenna 102 to receive the first analog radio frequency input signal ARFI ₁ , but the signal receiving circuit 300 also includes another antenna 302 to receive the second analog radio frequency input signal ARFI ₂ , wherein the second analog radio frequency input signal ARFI ₂ also includes a plurality of signal components conforming to different wireless transmission standards. Therefore, the signal receiving circuit 300 may further include a multiplexer 304 to selectively output the first analog RF input signal ARFI ₁ or the second analog RF input signal ARFI ₂ to the receiving path 101 . The multiplexer 304 can be controlled by a control unit 306 but not limited thereto. After the second analog radio frequency input signal ARFI ₂ is input to the receiving path 101 , subsequent actions are the same as after the first analog radio frequency input signal ARFI ₁ is input to the receiving path 101 , so details will not be repeated here. With such a structure, when the analog radio frequency input signals contain signal components conforming to different wireless transmission standards but having similar frequency bands, the analog radio frequency input signals can be received separately to ensure that the signals do not interfere with each other. In one embodiment, at least one of the signal components included in the second analog RF input signal ARFI ₂ is different from the signal components included in the first analog RF input signal ARFI ₁ according to at least one of the wireless transmission standards.

FIG. 4 illustrates an example of the detailed circuit of the signal receiving circuit shown in FIG. 1A . However, please note that the circuit shown in FIG. 4 is only used as an example, and does not mean to limit the present invention. As shown in FIG. 4 , the receiving path 101 includes an amplifier 401 , a mixer 403 , a down-sampling filter 405 and an analog-to-digital converter 407 . The amplifier 401 is used to amplify the first analog radio frequency input signal ARFI ₁ to make it easier to be judged and processed. The mixer 403 is used for receiving a carrier signal Lo ₁ and mixing the analog RF input signal ARFI ₁ with the carrier signal Lo ₁ to generate a mixed RF input signal MRFI. The down-sampling filter 405 is used for filtering and down-sampling the mixed RF input signal MRFI to generate an analog IF input signal RIFI. The analog-to-digital converter 407 is used to convert the analog IF input signal RIFI into a digital IF input signal DIFI.

In this embodiment, the first digital down converter 103 and the second digital down converter 105 include mixers 409 , 413 and downsampling filters 411 , 415 respectively. The mixers 409 and 413 respectively receive the carrier signals Lo ₂ and Lo ₃ to carry the digital intermediate frequency input signal DIFI to different frequencies. The downsampling filters 411 and 415 respectively perform downsampling and different filtering operations on the digital intermediate frequency input signal DIFI to generate a first digital baseband signal DBFS ₁ and a second digital baseband signal DBFS ₂ respectively. However, please note that the carrier Lo ₂ and Lo ₃ are to allow the digital intermediate frequency input signal DIFI to be processed by the down-sampling filters 411 and 415 in an appropriate frequency band, so if the digital intermediate frequency input signal DIFI is already in the appropriate frequency band when it is received , then the mixers 409 and 413 may not be needed. Moreover, the first digital down converter 103 and the second digital down converter 105 can also be implemented by other circuits.

FIG. 5A illustrates a signal transmission circuit 500 according to an embodiment of the present invention. As shown in Figure 5A, the signal transmission circuit 500 includes a transmission path 501, a first digital up-converter 503, a second up-converter 505, a first baseband signal processing module 507 and a second baseband signal Processing module 509 . The first baseband signal processing module 507 is used to output a first digital baseband signal DBFS ₁ processed by a first wireless transmission standard (such as Wifi), and the second baseband signal processing module 509 is used to output a second baseband signal A second digital baseband signal DBFS ₂ processed by a wireless transmission standard (such as Bluetooth). The first digital up-converter 503 receives the first digital baseband signal DBFS ₁ and performs filtering and upsampling operations (such as interpolation operations) on the first digital baseband signal DBFS ₁ to obtain a first digital intermediate frequency signal DIFS ₁ . The second digital up-converter 505 receives the second digital baseband signal DBFS ₂ and performs filtering and upsampling operations on the second digital baseband signal DBFS ₂ to obtain a second digital intermediate frequency signal DIFS ₂ . The transmission path 501 converts the first digital intermediate frequency signal DIFS ₁ into a first analog radio frequency output signal ARFO ₁ or converts the second digital intermediate frequency signal DIFS ₂ into a second analog radio frequency output signal ARFO ₁ , and outputs the first analog radio frequency output signal ARFO ₁ or the second analog radio frequency output signal ARFO ₂ (in this example, to the antenna 502).

FIG. 5B shows an extension of the embodiment shown in FIG. 5A. As shown in FIG. 5B , the signal receiving circuit 520 also includes a receiving path 501 , and also includes a digital up-conversion module 521 and N baseband signal processing modules B ₁ -B _N . The digital up conversion module 521 includes M digital up converters U ₁ - U _M . M and N may be the same positive integer greater than 2, or different positive integers greater than 2. After the digital up-converter U _1- U _M receives the digital baseband signal DBFS ₁ -DBFS _N from the baseband signal processing module B _1- B _N , it performs filtering and up-sampling operations to obtain the digital intermediate frequency signal DIFS ₁ -DIFS _M . The digital up-converter U _1- U _M and the baseband signal processing module B _1- B _N can be in a one-to-one relationship, that is, each digital up-converter U _1- U _M is only coupled to the baseband signal processing module at most One of the modules B _1- B _N , and different digital up-converters are coupled to different baseband signal processing modules B _1- B _N . The digital up-converter U _1- U _M and the baseband signal processing module B _1- B _N can also be a many-to-many relationship, that is, each digital up-converter U _1- U _M can be coupled to the baseband signal processing module Multiple of modules B _1- B _N. Alternatively, each baseband signal processing module B ₁ -B _N may be coupled to a plurality of digital up-converters U _{1 -UM} . The baseband signal processing modules B1 _{- BN} can respectively use N different wireless transmission standards, or two baseband signal processing modules can use the same baseband signal processing module. With such a structure, the connection mode of the digital up-converter and the baseband signal processing module can be freely adjusted according to the design requirements, and the wireless transmission standards to be used by the baseband signal processing module can be arbitrarily set. The applicability of the signal receiving circuit. However, please note that although FIG. 5B is described based on FIG. 5A , the embodiment in FIG. 5B can also be used in both the embodiments in FIG. 6 and FIG. 7A . And the embodiment of FIG. 5B can also use the structure of FIG. 6 .

FIG. 6 shows an example of the detailed circuit of the signal transmission circuit 500 shown in FIG. 5A . However, please note that the circuit shown in FIG. 6 is only for example, and does not mean to limit the present invention. The first digital up-converter 503 and the second digital up-converter 505 respectively include mixers 613 , 617 and upsampling filters 611 , 615 . The upsampling filters 611 and 615 respectively perform upsampling and different filtering operations on the first digital baseband signal DBFS ₁ and the _second digital baseband signal DBFS2. The mixers 613 and 617 respectively receive the carrier signals Lo ₂ and Lo ₃ to load the outputs of the upsampling filters 611 and 615 to different frequencies to form a first digital intermediate frequency signal DIFS ₁ and a second digital intermediate frequency signal DIFS ₂ . However, please note that the carriers Lo ₂ and Lo ₃ are for the first digital intermediate frequency signal DIFS ₁ and the second digital intermediate frequency signal DIFS ₂ to be processed by the transmission path 501 in an appropriate frequency band, so if the first digital base frequency signal DBFS ₁ and the second digital intermediate frequency signal DBFS 1 The second digital baseband signal DBFS ₂ is already in a proper frequency band when it is received by the transmission path 501 , so the mixers 613 and 617 may not be needed. Moreover, the first digital up-converter 503 and the second digital up-converter 505 can also be implemented by other circuits.

The transmission path 501 includes an amplifier 601 , a mixer 603 , an upsampling filter 605 and a digital-to-analog converter 607 . The DAC 607 converts the first digital IF signal DIFS ₁ into a first analog IF signal AIFS ₁ , or converts the second digital baseband signal DIFS ₂ into a second analog IF signal AIFS ₂ . The up-sampling filter 605 is used for filtering and up-sampling the first analog IF signal AIFS ₁ or the second analog IF signal AIFS ₂ to generate a first analog RF signal ARFS ₁ or a second analog RF signal ARFS ₂ respectively. The mixer 603 is used to receive a carrier signal Lo ₁ , and mix the first analog radio frequency signal ARFS ₁ with the carrier signal Lo ₁ to generate the first analog radio frequency output signal ARFO ₁ , or mix the second analog radio frequency signal ARFS ₂ with the Carrier signal Lo ₁ to generate a second analog RF output signal ARFO ₂ . The first analog radio frequency output signal ARFO ₁ and the second analog radio frequency output signal ARFO ₂ are the same as the mixed radio frequency input signal MRFI ₁ in FIG. 4 , which are mixed signals after the signals are loaded on a carrier. The amplifier 601 is used to amplify the first analog radio frequency output signal ARFO ₁ or the second analog radio frequency output signal ARFO ₂ so that the other receiving end can receive a clearer signal.

FIG. 7A illustrates a signal transmitting and receiving circuit 700 according to an embodiment of the present invention, which combines the signal receiving circuit 100 of FIG. 1A and the signal transmitting circuit 500 of FIG. 5A . As shown in Figure 7A, the signal transmitting and receiving circuit 700 includes a receiving path 701, a first digital down converter 703, a second digital down converter 705, a first baseband signal processing module 707, a second baseband A frequency signal processing module 709 , a first digital up-converter 711 , a second digital up-converter 713 and a transmission path 715 . The elements shown in FIG. 7A can all use the structures shown in FIGS. 4 and 6 . The actions of the receiving path 701, the first digital down-converter 703, the second digital down-converter 705, the first baseband signal processing module 707 and the second baseband signal processing module 709 are the same as those of the signal receiving circuit 100 shown in FIG. 1A The same, and the first baseband signal processing module 707, the second baseband signal processing module 709, the first digital up-converter 711, the second digital up-converter 713 and the transmission path 715 and the signal transmission circuit 500 shown in FIG. 5A The same, so it will not be repeated here. Please note that the embodiment of FIG. 7A can also include the multiplexer 304 of FIG. 3 .

In addition, when the receiving path 701 and the transmitting path 715 use the structure of FIG. 4 and FIG. 6, the signal transmitting and receiving circuit 700 may also include a carrier wave generator 717 for generating a carrier signal to the receiving path 701 and the transmitting path 715. mixer. In one embodiment, the carrier generator 717 generates the same carrier to the mixers in the receive path 701 and the transmit path 715 . That is to say, the signal received by the receiving path 701 and the signal transmitted by the transmitting path 715 can be carried at the same frequency. In addition, in one embodiment, the signal transmitting and receiving circuit 700 may further include a duplexer 719, and the function of the duplexer 719 is to transmit the signal to a desired path. For example, when the signal transmitting and receiving circuit 700 receives a signal, the signal received through the antenna 702 is only transmitted to the receiving path 701 and not transmitted to the transmitting path 715 . On the contrary, when the signal transmitting and receiving circuit 700 transmits a signal, the output signal of the transmitting path 715 is only transmitted to the antenna 702 and not transmitted to the receiving path 701 .

However, please note that although the foregoing embodiments are described with two digital down-converters, two digital up-converters and two baseband signal processing modules, it does not represent the signal transmission circuit and signal receiving circuit provided by the present invention. And the signal transmitting and receiving circuit can only use two digital down converters or two digital up converters, and it can also use more than two digital down converters, digital up converters and baseband signal processing modules. Moreover, in the aforementioned embodiments, filters can be appropriately added to the output ends of each component, and the gain of each component can also be adjusted corresponding to the difference in wireless transmission standards covered by the received signal.

FIG. 7B shows an extension of the embodiment shown in FIG. 7A. The signal transmitting and receiving circuit 720 in FIG. 7B also includes the receiving path 701 , the transmitting path 715 and the carrier generator 717 in FIG. 7A , but these elements are not limited to be present. In addition, the signal transmitting and receiving circuit 720 also includes a sampling conversion module 721 and N baseband signal processing modules. The sampling conversion module 721 includes M ₁ digital down converters D ₁ -D _M and M ₂ digital up converters U ₁ -U _M2 . M ₁ and M ₂ can be the same positive integer or different positive integers. The connection and operation mode between M ₁ digital down converters D ₁ -D _M and N baseband signal processing modules have been described in the embodiment of Fig. 1B, and M ₂ digital up converters U ₁ -U _M2 and The connections and operation modes among the N baseband signal processing modules have been described in the embodiment of FIG. 5B , so details are not repeated here. In addition, the embodiment shown in FIG. 7B can also use the structure shown in FIG. 6 .

According to the foregoing embodiments, a signal receiving method can be obtained. In one embodiment, it is applied in the embodiment shown in FIG. 1A , but not limited thereto. This signal receiving method includes the steps shown in Figure 8:

Step 801

A first analog radio frequency input signal ARFI ₁ is converted into a digital intermediate frequency input signal DIFI by a receiving path. Wherein the first analog radio frequency input signal packet ARFI ₁ contains a first signal component and a second signal component, the first signal component conforms to a first wireless transmission standard (such as Wifi) and the second signal component conforms to a second signal component Wireless transmission standards (such as Bluetooth), but these signal components are not limited to Wifi and Bluetooth.

Step 803

Filtering and down-sampling are performed on the digital intermediate frequency input signal DIFI to obtain the first signal component as a first digital baseband signal DBFS ₁ .

Step 805

Filtering and down-sampling are performed on the digital intermediate frequency input signal DIFI to obtain the second signal component as a second digital baseband signal DBFS ₂ .

Step 807

Process the first digital baseband signal DBFS ₁ with the first wireless transmission standard.

Step 807

Process the second digital baseband signal DBFS ₂ with the second wireless transmission standard.

According to the foregoing embodiments, a signal transmission method can be obtained. In one embodiment, it is applied in the embodiment shown in FIG. 5A , but not limited thereto. This signaling method consists of the steps shown in Figure 9:

Step 901

Outputting a first digital baseband signal DBFS ₁ processed by a first wireless transmission standard.

Step 903

and outputting a second digital baseband signal DBFS ₂ processed by a second wireless transmission standard.

Step 905

Filtering and up-sampling operations are respectively performed on the first digital baseband signal _DBFS1 and the _second digital baseband signal DBFS2 to generate a first digital intermediate frequency signal _DIFS1 and a second digital intermediate frequency signal _DIFS2 .

Step 907

Convert the first digital intermediate frequency signal DIFS ₁ into a first analog radio frequency output signal ARFO ₁ , or convert the second digital intermediate frequency signal DIFS ₂ into a second analog radio frequency output signal ARFO ₂ , and output the first analog radio frequency output signal ARFO ₁ Or the second analog radio frequency output signal ARFO ₂ .

According to the foregoing embodiments, a signal transmission and reception method can be obtained, which is applied in the embodiment shown in FIG. 7A in one embodiment, but is not limited thereto. This signaling method includes the steps shown in Figure 10:

Step 1001

Use a receiving path 701 to convert a first analog radio frequency input signal ARFI ₁ into a digital intermediate frequency input signal DIFI and output a digital intermediate frequency input signal DIFI, wherein the first analog radio frequency input signal ARFI ₁ includes a first signal component and a second Signal components The first signal component complies with a first wireless transmission standard and the second signal component complies with a second wireless transmission standard.

Step 1003

Filtering and down-sampling are performed on the digital intermediate frequency input signal DIFI to obtain the first signal component as a first digital baseband signal DBFS ₁ .

Step 1005

Filtering and down-sampling are performed on the digital intermediate frequency input signal DIFI to obtain a second signal component as a second digital baseband signal DBFS ₂ .

Step 1007

Use a first baseband signal processing module 707 to process the first digital baseband signal DBFS ₁ with the first wireless transmission standard, or make the first baseband signal processing module 707 output a third digital baseband conforming to the first wireless transmission standard Signal DBFS ₃ .

Step 1009

Use a second baseband signal processing module 709 to process the _second digital baseband signal DBFS2 with the first wireless transmission standard, or make the second baseband signal processing module 709 output a fourth digital baseband that meets the second wireless transmission standard Signal DBFS ₄ .

Step 1011

Filtering and up-sampling operations are respectively performed on the third digital baseband signal DBFS ₃ and the fourth digital baseband signal DBFS ₄ to generate a third digital intermediate frequency signal DIFS ₃ and a fourth digital intermediate frequency signal DIFS ₄ .

Step 1013

Convert the third digital intermediate frequency signal DIFS ₃ into a third analog radio frequency output signal ARFO ₃ , or convert the fourth digital intermediate frequency signal DIFS ₄ into a second analog radio frequency output signal ARFO ₄ , and output the first analog radio frequency output signal ARFO ₃ or The second analog radio frequency output signal ARFO ₄ .

The detailed steps of the methods shown in FIG. 8 , FIG. 9 and FIG. 10 can be deduced from the foregoing embodiments, so details are not repeated here.

According to the foregoing embodiments, the same circuit can be used to transmit signals conforming to different wireless transmission standards, thereby avoiding the problems in the prior art.

The above descriptions are only preferred embodiments of the present invention, and all equivalent changes and modifications made according to the scope of the patent application of the present invention shall fall within the scope of the present invention.

Claims (17)

1. A signal receiving circuit, comprising: a receiving path for converting a first analog radio frequency input signal into a digital intermediate frequency input signal and outputting the digital intermediate frequency input signal, wherein the first analog radio frequency input signal includes a first signal component and a second signal component, The first signal component complies with a first wireless transmission standard and the second signal component complies with a second wireless transmission standard; A first digital down converter, receiving the digital intermediate frequency input signal, and obtaining a first digital baseband signal corresponding to the first signal component after processing; A second digital down converter receives the digital intermediate frequency input signal, and obtains a second digital baseband signal corresponding to the second signal component after processing; a first baseband signal processing module, processing the first digital baseband signal with the first wireless transmission standard; a second baseband signal processing module, processing the second digital baseband signal with the second wireless transmission standard; and A multiplexer selectively outputs the first analog radio frequency input signal or a second analog radio frequency input signal to the receiving path, wherein the second analog radio frequency input signal includes a third signal component and a fourth signal component , wherein at least one of the third signal component and the fourth signal component complies with different wireless transmission standards from the first signal component and the second signal component. 2. The signal receiving circuit according to claim 1, wherein the receiving path comprises: a mixer for receiving a carrier signal and mixing the first analog radio frequency input signal with the carrier signal to generate a mixed radio frequency input signal; a downsampling filter for filtering and downsampling the mixed RF input signal to generate an analog IF input signal; and An analog-to-digital converter is used to convert the analog intermediate frequency input signal into the digital intermediate frequency input signal. 3. A signal transmission and reception circuit, comprising: a receiving path for converting a first analog radio frequency input signal into a digital intermediate frequency input signal and outputting the digital intermediate frequency input signal, wherein the first analog radio frequency input signal includes a first signal component and a second signal component, The first signal component complies with a first wireless transmission standard and the second signal component complies with a second wireless transmission standard; A first digital down converter, receiving the digital intermediate frequency input signal, and obtaining a first digital baseband signal corresponding to the first signal component after processing; A second digital down converter receives the digital intermediate frequency input signal, and obtains a second digital baseband signal corresponding to the second signal component after processing; A first baseband signal processing module, processing the first digital baseband signal according to the first wireless transmission standard, or outputting a third digital baseband signal conforming to the first wireless transmission standard; A second baseband signal processing module, processing the second digital baseband signal according to the second wireless transmission standard, or outputting a fourth digital baseband signal conforming to the second wireless transmission standard; A first digital up-converter, receiving the third digital baseband signal and performing filtering and upsampling operations on the third digital baseband signal to obtain a third digital intermediate frequency signal; A second digital up-converter, receiving the fourth digital baseband signal and performing filtering and upsampling operations on the fourth digital baseband signal to obtain a fourth digital intermediate frequency signal; A transmission path, converting the third digital intermediate frequency signal into a third analog radio frequency output signal, or converting the fourth digital intermediate frequency signal into a fourth analog radio frequency output signal, and outputting the third analog radio frequency output signal or the fourth analog radio frequency output signal Analog RF output signal; and A multiplexer selectively outputs the first analog radio frequency input signal or a second analog radio frequency input signal to the receiving path, wherein the second analog radio frequency input signal includes a third signal component and a fourth signal component , wherein at least one of the third signal component and the fourth signal component complies with different wireless transmission standards from the first signal component and the second signal component. 4. The signal transmitting and receiving circuit according to claim 3, further comprising a carrier generator for generating a carrier signal: The receive path includes: A first mixer for receiving the carrier signal and generating a mixed radio frequency input signal after processing; a downsampling filter for processing the mixed RF input signal to generate an analog IF input signal; and an analog-to-digital converter, used to convert the analog intermediate frequency input signal into the analog intermediate frequency input signal; The delivery path includes: A digital-to-analog converter, used to convert the third digital intermediate frequency signal into a third analog intermediate frequency signal, or to convert the fourth digital intermediate frequency signal into a fourth analog intermediate frequency signal; an upsampling filter for processing the third analog IF signal or the fourth analog IF signal to generate a third analog radio frequency signal or a fourth analog radio frequency signal; and a second mixer for receiving the carrier signal, and mixing the carrier signal with the third analog radio frequency signal to generate the third analog radio frequency output signal, or mixing the carrier signal with the fourth analog radio frequency signal to generate the The fourth analog radio frequency output signal. 5. A signal receiving method, comprising: Converting a first analog radio frequency input signal into a digital intermediate frequency input signal with a receiving path and outputting the digital intermediate frequency input signal, wherein the first analog radio frequency input signal includes a first signal component and a second signal component, the first a signal component complies with a first wireless transmission standard and the second signal component complies with a second wireless transmission standard; processing the digital intermediate frequency input signal to obtain a first digital baseband signal corresponding to the first signal component; processing the digital intermediate frequency input signal to obtain a second digital baseband signal corresponding to the second signal component; process the first digital baseband signal with the first wireless transmission standard; process the second digital baseband signal with the second wireless transmission standard; and selectively output the first analog radio frequency input signal or a second analog radio frequency input signal to the receiving path, wherein the second analog radio frequency input signal includes a third signal component and a fourth signal component, wherein the third At least one of the signal component and the fourth signal component complies with different wireless transmission standards from the first signal component and the second signal component. 6. The signal receiving method according to claim 5, wherein the step of converting a first analog radio frequency input signal into a digital intermediate frequency input signal comprises: mixing the analog radio frequency input signal with a carrier signal to generate a mixed radio frequency input signal; processing the mixed RF input signal to generate an analog IF input signal; and converting the analog IF input signal into the digital IF input signal. 7. A signal transmission and reception method, comprising: Using a receiving path to convert a first analog radio frequency input signal into a digital intermediate frequency input signal and output the digital intermediate frequency input signal, wherein the first analog radio frequency input signal includes a first signal component and a second signal component, and the first analog radio frequency input signal includes a first signal component and a second signal component. a signal component complies with a first wireless transmission standard and the second signal component complies with a second wireless transmission standard; processing the digital intermediate frequency input signal to obtain a first digital baseband signal corresponding to the first signal component; processing the digital intermediate frequency input signal to obtain a second digital baseband signal corresponding to the second signal component; Use a first baseband signal processing module to process the first digital baseband signal with the first wireless transmission standard, or make the first baseband signal processing module output a third digital baseband conforming to the first wireless transmission standard Signal; Use a second baseband signal processing module to process the second digital baseband signal with the second wireless transmission standard, or make the second baseband signal processing module output a fourth digital baseband conforming to the second wireless transmission standard Signal; receiving the third digital baseband signal and performing filtering and up-sampling operations on the third digital baseband signal to obtain a third digital intermediate frequency signal; receiving the fourth digital baseband signal and performing filtering and up-sampling operations on the fourth digital baseband signal to obtain a fourth digital intermediate frequency signal; Converting the third digital intermediate frequency signal into a third analog radio frequency output signal, or converting the fourth digital intermediate frequency signal into a fourth analog radio frequency output signal, and outputting the third analog radio frequency output signal or the fourth analog radio frequency output signal ;as well as selectively output the first analog radio frequency input signal or a second analog radio frequency input signal to the receiving path, wherein the second analog radio frequency input signal includes a third signal component and a fourth signal component, wherein the third At least one of the signal component and the fourth signal component complies with different wireless transmission standards from the first signal component and the second signal component. 8. A signal receiving circuit, comprising: A receiving path is used to convert a first analog radio frequency input signal into a digital intermediate frequency input signal and output the digital intermediate frequency input signal, wherein the first analog radio frequency input signal includes a plurality of signal components, and the signal components conform to at least one wireless transmission standard; A digital down-conversion module, including M digital down-converters, used to receive the digital intermediate frequency input signal, and obtain M digital baseband signals corresponding to the signal components after processing, wherein the M is greater than or equal to 2 positive integer; N baseband signal processing modules process the digital baseband signal with the corresponding wireless transmission standard, wherein the N is a positive integer greater than or equal to 2, and the values of M and N are different; and A multiplexer selectively outputs the first analog radio frequency input signal or a second analog radio frequency input signal to the receiving path, wherein the second analog radio frequency input signal includes a third signal component and a fourth signal component , wherein at least one of the third signal component and the fourth signal component complies with different wireless transmission standards from the plurality of signal components included in the first analog RF input signal, Wherein the digital down converter is connected to the baseband signal processing module in at least one of the following connection ways: One of the digital down converters is connected to at least one baseband signal processing module; and One of the baseband signal processing modules is connected to at least one digital down converter. 9. The signal receiving circuit according to claim 8, wherein the baseband signal processing modules respectively use different wireless transmission standards. 10. The signal receiving circuit according to claim 8, wherein at least one of the baseband signal processing modules uses the same wireless transmission standard. 11. A signal transmission circuit, comprising: N baseband signal processing modules, configured to output N digital baseband signals according to at least one wireless transmission standard, where N is a positive integer greater than or equal to 2; A digital up-conversion module, including M digital up-converters, used to receive the digital baseband signal, and generate M digital intermediate frequency signals after processing, wherein the M is a positive integer greater than or equal to 2, and the M and the N The values are different; A transmission path, respectively converting the digital intermediate frequency signal into an analog radio frequency output signal, and outputting the analog radio frequency output signal; Wherein the digital up-converter is connected to the baseband signal processing module in at least one of the following connection ways: One of the digital up-converters is connected to at least one of the baseband signal processing modules; and One of the baseband signal processing modules is connected to at least one digital up-converter. 12. The signal transmission circuit according to claim 11, wherein the baseband signal processing modules respectively use different wireless transmission standards. 13. The signal transmission circuit as claimed in claim 11, wherein at least one of the baseband signal processing modules uses the same wireless transmission standard. 14. A signal transmission and reception circuit, comprising: A receiving path for converting a first analog radio frequency input signal into a digital intermediate frequency input signal and outputting the digital intermediate frequency input signal, wherein the first analog radio frequency input signal includes a plurality of signal components, and the signal components conform to at least one Wireless transmission standard; _A digital down-conversion module, including M1 digital down-converters, used to receive the digital intermediate frequency input signal, and obtain M1 digital baseband signals corresponding to the signal components after processing, wherein the M1 is greater _than or equal to ₂ a positive integer; N baseband signal processing modules process the digital baseband signal corresponding to the wireless transmission standard or output the digital baseband signal conforming to the wireless transmission standard, wherein the N is a positive integer greater than or equal to 2, and the M ₁ is different from the value of N; A digital up-conversion module, including _M2 digital up-converters, used to receive the digital baseband signals output by the baseband signal processing module, and generate _M2 digital intermediate frequency signals after processing, wherein the _M2 is greater than or a positive integer equal to 2, the value of the M ₂ is different from the value of the N; A transmission path, converting these digital intermediate frequency signals into analog radio frequency output signals, and outputting the analog radio frequency output signals; Wherein the digital down converters are connected to the baseband signal processing modules in at least one of the following connection modes: One of the digital down converters is connected to at least one baseband signal processing module; and One of the baseband signal processing modules is connected to at least one of the digital down converters; Wherein the digital up-converters are connected to the baseband signal processing modules in at least one of the following connection ways: One of the digital up-converters is connected to at least one of the baseband signal processing modules; and One of the baseband signal processing modules is connected to at least one digital up-converter. 15. The signal transmitting and receiving circuit according to claim 14, wherein the baseband signal processing modules respectively use different wireless transmission standards. 16. The signal transmitting and receiving circuit according to claim 14, wherein at least one of the baseband signal processing modules uses the same wireless transmission standard. 17. The signal transmitting and receiving circuit as claimed in claim 14, wherein the M ₁ is the same as the M ₂ .