Transceiving and combination signal processing circuit and method

Abstract

Disclosed in the present invention are a transceiving and combination signal processing circuit and method. The circuit comprises a radio frequency transceiver, double-pole double-throw switches and antennas. A first double-pole double-throw switch cooperates with a second double-pole double-throw switch to perform signal switching, and signals in different systems and different bands can be received by means of different antennas, such that the design of any CA combination of a low-frequency signal, an intermediate-frequency signal and a high-frequency signal is realized, and the problem of mutual interference of signals and the problem of a large insertion loss of a trace of a PCB, which problems are possibly caused when a 3P3T switch or a 4T4P switch or another multiple-pole multiple-throw switch is used, are avoided. In addition, a signal processing path, antennas and a signal switching apparatus are added, so as to realize a signal-band 4*4Mimo combination and any CA 2*2Mimo combination, such that the present invention is adapted to a more complicated antenna transceiving environment.

Description

A combined signal processing circuit and method for transmitting and receiving Technical Field

[0001] The present invention belongs to the technical field of wireless radio frequency communications and relates to a combined transmitting and receiving signal processing circuit and method. Background Art

[0002] Figure 1 shows a conventional design for a conventional mid- to high-frequency CA or ENDC multi-channel transmission and reception band combination. RF signals are transmitted by the RF transceiver, amplified by amplifier 300 (MMPA), and processed by quadplexer 200 (B1+B3 or B25+B66). Finally, they are transmitted and received via antenna 100. High-frequency signals, such as B40 and B41, are amplified by the MMPA, filtered by filters 500 and 600, switched by single-pole, multi-throw switch 700 (SPxT), and finally transmitted and received via antenna 800. This design allows for CA combinations of B1+B3 and B25+B66, B1+B3 and B25+B66, and B40 and B41. However, these designs are expensive and offer limited performance, significantly impacting projects and designers.

[0003] Figure 2 shows a conventional 5G ENDC 4G+5G dual-connection design. The 4G signal is transmitted via TX1, amplified by MMPA1, filtered by a duplex filter, and ultimately switched to the antenna via a 3P3T or 4P4T switch. The 5G signal is amplified by MMPA2, filtered by a duplex filter, and also switched to the antenna via a 3P3T or 4P4T switch. This ensures the ENDC's dual-transmission capabilities of 4G and 5G signals. This design has several significant drawbacks. Because the isolation of individual 3P3T or 4P4T switches is limited to approximately 30dB, mutual interference between the transmitted signals is highly likely to occur. Once this occurs, it cannot be resolved, resulting in serious problems such as product certification failure and market launch. Another significant drawback of this design is that since all antennas are connected to the 3P3T switch and are distributed across the PCB, the antenna traces are very long, resulting in significant insertion loss and compromised performance.

[0004] Summary of the Invention

[0005] The present invention provides a combined signal processing circuit and method for transmitting and receiving, which reduces the insertion loss of wiring on a PCB board and the possibility of signal winding, and improves the performance of an antenna in transmitting and receiving signals.

[0006] The present invention provides a transceiver combined signal processing circuit, comprising a radio frequency transceiver, a first double-pole double-throw switch, a second double-pole double-throw switch, a first antenna, a second antenna, and a third antenna;

[0007] A first radio frequency signal is received via the first antenna, the second antenna, or the third antenna, and is switched to the first signal processing path for signal processing via the second double-pole double-throw switch and the first double-pole double-throw switch; or is directly switched to the first signal processing path for signal processing via the first double-pole double-throw switch, and then the first radio frequency signal is received and demodulated by the radio frequency transceiver.

[0008] The second RF signal is received through the second antenna or the third antenna, and after being switched to the second signal processing path by the second double-pole double-throw switch for signal processing, the RF transceiver receives and demodulates the first RF signal.

[0009] Furthermore, it includes a third signal processing path, a third double-pole double-throw switch and a fourth antenna;

[0010] The fourth antenna is used to receive the first radio frequency signal or the third radio frequency signal;

[0011] The third double-pole double-throw switch is used to switch the first radio frequency signal or the third radio frequency signal received through the fourth antenna or the first antenna to the first double-pole double-throw switch or the third signal processing path respectively;

[0012] The third signal processing path processes the third radio frequency signal and transmits it to the radio frequency transceiver for reception and demodulation.

[0013] Furthermore, it also includes a first combiner;

[0014] The first combiner divides the third radio frequency signal and the fourth radio frequency signal received by the first antenna into a third signal processing path or the second double-pole double-throw switch respectively;

[0015] After the third signal processing path processes the third radio frequency signal, the third radio frequency signal is transmitted to the radio frequency transceiver for reception and demodulation;

[0016] After the fourth radio frequency signal is switched to the first signal processing path through the second double-pole double-throw switch for signal processing, the fourth radio frequency signal is received and demodulated by the radio frequency transceiver.

[0017] Furthermore, it also includes a second combiner and a fourth signal processing path;

[0018] The second combiner divides the second RF signal and the fourth RF signal received by the third antenna into the second double-pole double-throw switch, and divides the third RF signal into the fourth RF signal processing path; the fourth signal processing path transmits the third RF signal to the RF transceiver for reception and demodulation;

[0019] After the second RF signal is switched to the second signal processing path through the second double-pole double-throw switch for signal processing, the second RF signal is received and demodulated by the RF transceiver;

[0020] After the fourth RF signal is switched to the first signal processing path through the second double-pole double-throw switch and the first double-pole double-throw switch for signal processing, the second RF signal is received and demodulated by the RF transceiver.

[0021] Furthermore, a fifth antenna is included;

[0022] After the fifth antenna receives the third radio frequency signal, the third radio frequency signal is processed by the fourth signal processing path, and then the radio frequency transceiver receives and demodulates the third radio frequency signal.

[0023] Further, the second signal processing path, the third signal processing path and the fourth signal processing path include a single-pole multi-throw switch and at least one filter;

[0024] The single-pole multi-throw switch switches the frequency band of the radio frequency signal and transmits the signal of each frequency band to the corresponding filter for filtering. The filter transmits the radio frequency signal to the radio frequency transceiver.

[0025] Furthermore, the first signal processing path includes a duplexer;

[0026] The duplexer is configured to filter the first radio frequency signal and transmit the filtered first radio frequency signal to the radio frequency transceiver.

[0027] Furthermore, it also includes an amplifier;

[0028] The amplifier amplifies the radio frequency signal transmitted by the radio frequency transceiver and transmits the amplified signal to the second signal processing path and the first signal processing path.

[0029] The present invention also provides a method for processing a combined transmitting and receiving signal, using the above-mentioned combined transmitting and receiving signal processing circuit, the method comprising:

[0030] The first RF signal is received via the first antenna, the second antenna, or the third antenna, and is switched to the first signal processing path via the second double-pole double-throw switch and the first double-pole double-throw switch. The first signal processing path processes the first RF signal; or the first RF signal is directly switched to the first signal processing path via the first double-pole double-throw switch for signal processing, and then the first RF signal is received and demodulated by the RF transceiver.

[0031] The second RF signal is received through the second antenna or the third antenna, and after being switched to the second signal processing path by the second double-pole double-throw switch for signal processing, the RF transceiver receives and demodulates the first RF signal.

[0032] Furthermore, the first RF signal is transmitted by the RF transceiver, passes through the amplifier, the first signal processing path, and the first double-pole double-throw switch, and the first double-pole double-throw switch switches the first RF signal to the first antenna or the second antenna for transmission; or is transmitted by the RF transceiver, passes through the amplifier, the first signal processing path, the first double-pole double-throw switch, and the second double-pole double-throw switch, and then switches the first RF signal to the second antenna or the third antenna for transmission;

[0033] The second radio frequency signal is transmitted by the radio frequency transceiver, passes through the amplifier, the second signal processing path and the second double-pole double-throw switch, and is switched to the second antenna or the third antenna for transmission.

[0034] Furthermore, the first antenna or the fourth antenna receives the first RF signal or the third RF signal respectively, and switches to the first double-pole double-throw switch or the third signal processing path respectively via the third double-pole double-throw switch for signal processing. The third signal processing path transmits the third RF signal to the RF transceiver for reception and demodulation.

[0035] Furthermore, a third radio frequency signal is transmitted by the radio frequency transceiver, and after signal processing is performed by a third signal processing path, a third double-pole double-throw switch switches the third radio frequency signal to the first antenna for transmission;

[0036] The first RF signal is transmitted by the RF transceiver, passes through the amplifier and the first signal processing path, and is then switched to a third double-pole double-throw switch via the first double-pole double-throw switch. The third double-pole switch switches the first RF signal to the first antenna or the third antenna for transmission; or is switched to a second double-pole double-throw switch via the first double-pole double-throw switch. The second double-pole switch switches the first RF signal to the second antenna or the fourth antenna for transmission.

[0037] Furthermore, the first combiner diverts the third RF signal and the fourth RF signal received by the first antenna to a third signal processing path or the first double-pole double-throw switch respectively; after the third signal processing path processes the third RF signal, it transmits the fourth RF signal to the RF transceiver for reception and demodulation.

[0038] Furthermore, a third radio frequency signal is transmitted by the radio frequency transceiver, is processed by a third signal processing path, and is then transmitted to the first combiner;

[0039] The fourth radio frequency signal is transmitted by the radio frequency transceiver, passes through the amplifier and the first signal processing path, and is then switched to the first combiner via the first double-pole double-throw switch;

[0040] The first combiner combines the third radio frequency signal and the fourth radio frequency signal to the first antenna for transmission.

[0041] Furthermore, the second combiner shunts the second RF signal and the fourth RF signal received by the third antenna to the second double-pole double-throw switch, and shunts the third RF signal to the fourth RF signal processing path;

[0042] The fourth signal processing path transmits the third RF signal to the RF transceiver for reception and demodulation;

[0043] After the second RF signal is switched to the second signal processing path through the second double-pole double-throw switch for signal processing, the second RF signal is received and demodulated by the RF transceiver;

[0044] After the fourth RF signal is switched to the first signal processing path through the second double-pole double-throw switch and the first double-pole double-throw switch for signal processing, the second RF signal is received and demodulated by the RF transceiver.

[0045] Furthermore, the third radio frequency signal is transmitted by the radio frequency transceiver, is processed by a fourth signal processing path, and is then transmitted to the second combiner;

[0046] The second radio frequency signal is transmitted by the radio frequency transceiver, passes through the amplifier and the third signal processing path, and is then switched to the second combiner via the second double-pole double-throw switch;

[0047] The fourth RF signal is transmitted by the RF transceiver, passes through the amplifier and the third signal processing path, and is then switched to the second combiner via the second double-pole double-throw switch and the first double-pole double-throw switch;

[0048] The second combiner combines the second RF signal and the third RF signal and transmits them to the third antenna.

[0049] Compared with the prior art, the present invention has at least the following technical effects:

[0050] The present invention switches signals by cooperating with a first double-pole double-throw switch and a second double-pole double-throw switch. Signals of different standards and frequency bands can be received by different antennas, thereby realizing an arbitrary CA combination design for low, medium, and high-frequency signals. The problem of signal mutual winding and high PCB trace insertion loss caused by using 3P3T, 4P4T or other multi-pole multi-throw switches is avoided.

[0051] Furthermore, the present invention also receives four groups of single-band Mimo signals through the first antenna, the second antenna, the third antenna and the fifth antenna respectively, and switches the signals through the double-pole double-throw switch and the first combiner to realize a single-band 4*4 Mimo combination.

[0052] Furthermore, the present invention also receives Mimo signals through the first antenna, the second antenna, and the third antenna, and switches the signals through the double-pole double-throw switch, the first combiner, and the second combiner respectively, to achieve a 2*2 Mimo combination of any CA between high, medium, and low frequency bands. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] FIG1 is a connection method of a radio frequency signal transceiver circuit in the prior art;

[0054] FIG2 is a connection method of a radio frequency signal transceiver circuit in the prior art;

[0055] FIG3 is a schematic structural diagram of a transceiver combined signal processing circuit according to a first embodiment of the present invention;

[0056] FIG4 is a schematic structural diagram of another transceiver combined signal processing circuit in Embodiment 1 of the present invention;

[0057] FIG5 is a diagram showing the position relationship of antennas in a communication device according to a first embodiment of the present invention;

[0058] FIG6 is a schematic structural diagram of another transceiver combined signal processing circuit in Embodiment 1 of the present invention;

[0059] FIG7 is a schematic structural diagram of another transceiver combined signal processing circuit in Embodiment 1 of the present invention;

[0060] FIG8 is a schematic structural diagram of another transceiver combined signal processing circuit in the first embodiment of the present invention. DETAILED DESCRIPTION

[0061] The following description of a combined transceiver signal processing circuit and method of the present invention is provided with reference to schematic diagrams, which illustrate preferred embodiments of the present invention. It should be understood that those skilled in the art may modify the present invention described herein while still achieving the advantageous effects of the present invention. Therefore, the following description should be understood as a general guide for those skilled in the art and is not intended to limit the present invention.

[0062] The following paragraphs describe the present invention in more detail by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the drawings are greatly simplified and not to exact scale, and are provided solely for the purpose of assisting in the description of the embodiments of the present invention.

[0063] Example 1

[0064] This embodiment provides a combined transceiver signal processing circuit, as shown in FIG3 , including: a radio frequency transceiver 11 , a double-pole double-throw switch, and an antenna.

[0065] The first RF signal is received by the first antenna 3, the second antenna 4 or the third antenna 5, and is switched to the first signal processing path for signal processing through the second double-pole double-throw switch 2 and the first double-pole double-throw switch 1; or is directly switched to the first signal processing path for signal processing through the first double-pole double-throw switch 1, and then the first RF signal is received and demodulated by the RF transceiver 11.

[0066] The second RF signal is received by the second antenna 4 or the third antenna 5 , and after the second double-pole double-throw switch 2 switches to the second signal processing path for signal processing, the RF transceiver 11 receives and demodulates the first RF signal.

[0067] In one specific example, an amplifier (MMPA) is further included to amplify the RF signal transmitted by the RF transceiver and transmit the amplified signal to the second signal processing path and the first signal processing path. The number of amplifiers can be selected based on specific needs. In one specific example, referring to FIG4 , the number of amplifiers is two.

[0068] In this example, the first signal is a low-intermediate frequency signal, and the second signal is a high-frequency signal. For example, the first signal may include LTE and 5G NR signals in frequency bands such as B1 / B2 / B3 / B4 / B5 / B8 / B20 / B28 / B25 / B66, and the second signal may include LTE frequency band signals such as B7 / B40 / B41.

[0069] Existing multi-pole, multi-throw switches, such as a three-pole, three-throw switch (see Table 1), have an average minimum isolation of around 30dB. The isolation of a single switch simply cannot meet the isolation requirements for transmitting and receiving two transmission signals.

[0070] Table 1

[0071] Referring to Table 2, compared to existing technologies, this embodiment utilizes double-pole, double-throw (DPDT) switches, achieving a minimum isolation of approximately 25dB below 2.7G. Two DPDTs connected in series, combined with the PCB pendulum isolation between the devices, achieve a normal isolation of at least 70dB, far exceeding the single-unit isolation of 3P3T / 4P4T switches. This ensures product performance and avoids the signal cross-talk and high PCB trace insertion loss issues that can arise when using 3P3T, 4P4T, or other multi-pole, multi-throw (MPMT) switches. Furthermore, by coordinating signal switching between the first DPDT switch 1 and the second DPDT switch 2, a CA design with arbitrary low, medium, and high-frequency signals is implemented.

[0072] Table 2

[0073] Please refer to Figure 5, which shows the working environment of the first antenna 3, the second antenna 4 and the third antenna 5 on the mobile phone. Compared with the conventional design, the antenna routing is shorter and the loss is smaller, and the component placement is more flexible, which reduces the overall debugging difficulty and improves the signal performance of the terminal.

[0074] Please refer to FIG. 6 , which is based on the circuit of FIG. 3 and further includes a third signal processing path, a third double-pole double-throw switch 15 and a fourth antenna 16 .

[0075] The fourth antenna 16 is configured to receive the first radio frequency signal or the third radio frequency signal.

[0076] The third DPDT switch 15 is used to switch the third RF signal or the first RF signal received via the fourth antenna 16 or the first antenna 3 to the first DPDT switch 1 or the third signal processing path, respectively.

[0077] The third signal processing path processes the third RF signal and transmits it to the RF transceiver 11 for reception and demodulation.

[0078] In this example, the third radio frequency signal is a low, medium, and high frequency full-band signal.

[0079] In addition, the above scheme switches the first RF signal to the third double-pole double-throw switch 15 or the second double-pole double-throw switch 2 through the first double-pole double-throw switch 1, and finally switches to the first antenna 3 / second antenna 4 / third antenna 5 / fourth antenna 16 for transmission, thereby realizing the SRS4 polling work of the frequency band.

[0080] Further, referring to FIG. 7 , based on the circuit of FIG. 3 , a third signal processing path and a first combiner 21 may be further included.

[0081] The first combiner 21 diverts the third RF signal and the fourth RF signal received by the first antenna 3 to the third signal processing path for signal processing or the first double-pole double-throw switch 12 respectively. The third signal processing path transmits the third RF signal to the RF transceiver 11 for reception and demodulation. After the fourth RF signal is switched to the first signal processing path for signal processing through the second double-pole double-throw switch 2, the fourth RF signal is received and demodulated by the RF transceiver 11.

[0082] At this time, the second antenna 4 can be used to receive the fourth radio frequency signal and the second radio frequency signal.

[0083] and a fourth signal processing path and a second combiner 22 .

[0084] The second combiner 22 shunts the second RF signal and the fourth RF signal received by the third antenna 5 to the second double-pole double-throw switch 2 , and shunts the third RF signal to the fourth RF signal processing path.

[0085] The fourth signal processing path transmits the third RF signal to the RF transceiver 11 for reception and subsequent demodulation.

[0086] After the second RF signal is switched to the second signal processing path through the second double-pole double-throw switch 2 for signal processing, the second RF signal is received and demodulated by the RF transceiver 11 .

[0087] After the fourth RF signal is switched to the first signal processing path through the second DPDT switch 2 and the first DPDT switch 1 for signal processing, the second RF signal is received and demodulated by the RF transceiver 11 .

[0088] In this example, the fourth radio frequency signal is a medium-high frequency signal, such as a signal in the B1 / B2 / B3 / B7 / B41 band.

[0089] The Mimo signal is received by the first antenna 3, the second antenna 4, and the third antenna 5, and the signal is switched respectively by the double-pole double-throw switch, the first combiner 21 and the second combiner 22 to realize a 2*2 Mimo combination of any CA between the high, medium and low frequency bands.

[0090] Furthermore, referring to FIG. 8 , based on the circuit of FIG. 3 , a third signal processing path and a first combiner 21 may be further included.

[0091] The first combiner 21 diverts the third RF signal and the fourth RF signal received by the first antenna 3 to the third signal processing path for signal processing or the first double-pole double-throw switch 1 respectively; the third signal processing path transmits the third RF signal to the RF transceiver 11 for reception and demodulation.

[0092] At this time, the second antenna 4 and the third antenna 5 are used to receive the fourth RF signal and the second RF signal.

[0093] and, a fourth signal processing path and a fifth antenna 20 .

[0094] After the fifth antenna 20 receives the third RF signal, the fourth signal processing path performs signal processing on the third RF signal, and then the RF transceiver 11 receives and demodulates the third RF signal.

[0095] Four groups of single-band Mimo signals are received respectively by the first antenna 3, the second antenna 4, the third antenna 5 and the fifth antenna 20, and the signals are switched through the double-pole double-throw switch and the first combiner 21 to realize a single-band 4*4 Mimo combination.

[0096] Specifically, the second signal processing path, the third signal processing path and the fourth signal processing path include a single-pole multi-throw switch and at least one filter;

[0097] In a specific example, the second signal processing circuit includes a first single-pole multi-throw switch 10, a first filter 8, and a second filter 9, capable of filtering high-frequency signals. The third signal processing path includes a second single-pole multi-throw switch 14, a third filter 12, and a fourth filter 13, capable of filtering signals of all frequency bands. The fourth signal processing path includes a third single-pole multi-throw switch 19, a fifth filter 17, and a sixth filter 18, capable of filtering signals of all frequency bands.

[0098] The SPMT switch switches the frequency band of the RF signal and transmits the signal of each frequency band to the corresponding filter for filtering. The filter transmits the RF signal to the RF transceiver 11. It is understood that the number of active ends of the switch and the number of filters are set according to the number of receiving frequency bands.

[0099] The first signal processing path includes a duplexer, which in this example includes a first duplexer 6 and a second duplexer 7 .

[0100] The duplexer is used to filter the first RF signal. In a specific example, the duplexer can filter medium and high frequency signals, such as B1 / B2 / B3 / B7 / B41. Alternatively, a duplexer that can filter low and medium frequency signals can be selected and transmit the filtered first RF signal to the RF transceiver 11. It is understood that the number and type of duplexers are set according to the number and type of receive frequency bands.

[0101] In the prior art, a quadplexer is generally used to filter the signal. However, the quadplexer has high loss, significantly affecting signal transmission and reception performance, and is expensive. In this embodiment, a duplexer is used to filter the first RF signal, thus avoiding the above-mentioned drawbacks.

[0102] In addition, in this example, the filter and the duplexer are both connected to the receiving end of the RF transceiver 11 .

[0103] Example 2

[0104] This embodiment provides a method for processing a combined transceiver signal, using the combined transceiver signal processing circuit of the first embodiment. The method includes the following steps:

[0105] When the combined transceiver signal processing circuit shown in Figure 3 is used:

[0106] The first RF signal is received through the first antenna 3, the second antenna 4 or the third antenna 5, and is switched to the first signal processing path through the second double-pole double-throw switch 2 and the first double-pole double-throw switch 1. The first signal processing path processes the first RF signal; or the first RF signal is directly switched to the first signal processing path through the first double-pole double-throw switch 1 for signal processing, and then the first RF signal is received and demodulated by the RF transceiver 11.

[0107] The second RF signal is received by the second antenna 4 or the third antenna 5 , and after the second double-pole double-throw switch 2 switches to the second signal processing path for signal processing, the RF transceiver 11 receives and demodulates the first RF signal.

[0108] Furthermore, the first RF signal is transmitted by the RF transceiver 11, passes through the amplifier, the first signal processing path and the first double-pole double-throw switch 1, and the first double-pole double-throw switch 1 switches the first RF signal to the first antenna 3 or the second antenna 4 for transmission; or passes through the amplifier, the first signal processing path, the first double-pole double-throw switch 1 and the second double-pole double-throw switch 2 and then switches to the second antenna 4 or the third antenna 5 for transmission.

[0109] The second RF signal is transmitted by the RF transceiver 11 , passes through the amplifier, the second signal processing path and the second double-pole double-throw switch 2 , and is then switched to the second antenna 4 or the third antenna 5 for transmission.

[0110] Furthermore, when the transceiver combined signal processing circuit shown in FIG6 is used:

[0111] The first antenna 3 or the fourth antenna 16 receives the first radio frequency signal or the third radio frequency signal respectively, and switches to the first double-pole double-throw switch 1 or the third signal processing path respectively via the third double-pole double-throw switch 15 .

[0112] The first double-pole double-throw switch 1 switches the first radio frequency signal and transmits it to the first signal processing path. The first signal processing path processes the first radio frequency signal and transmits it to the radio frequency transceiver 11 for reception and demodulation.

[0113] The third signal processing path transmits the third RF signal to the RF transceiver 11 for reception and demodulation.

[0114] The second RF signal is received by the second antenna 4 or the third antenna 5 , and after the second double-pole double-throw switch 2 switches to the second signal processing path for signal processing, the RF transceiver 11 receives and demodulates the first RF signal.

[0115] When the RF signal needs to be transmitted, the third RF signal is transmitted by the RF transceiver 11 . After signal processing by the third signal processing path, the third double-pole double-throw switch 15 switches the third RF signal to the first antenna 3 for transmission.

[0116] The first RF signal is transmitted by the RF transceiver 11, passes through the amplifier and the first signal processing path, and is switched to the third DPDT switch 15 via the first DPDT switch 1. The third DPDT switch switches the first RF signal to the first antenna 3 or the third antenna 5 for transmission; or is switched to the second DPDT switch 2 via the first DPDT switch 1. The second DPDT switch 2 switches the first RF signal to the second antenna 4 or the fourth antenna 16 for transmission.

[0117] The second radio frequency signal is transmitted by the radio frequency transceiver 11, passes through the amplifier, the second signal processing path and the second double-pole double-throw switch 2, and is then switched to the second antenna 4 or the third antenna 5 for transmission.

[0118] At this time, the first RF signal and the third RF signal can be transmitted to the first antenna 3 and the fourth antenna 16 respectively at the same time, thereby realizing the combined reception of the first RF signal and the third RF signal, and performing various CA combinations with the second RF signal.

[0119] Furthermore, the first RF signal can be switched to the third double-pole double-throw switch 15 or the second double-pole double-throw switch 2 through the first double-pole double-throw switch 1, and finally switched to the first antenna 3 / second antenna 4 / third antenna 5 / fourth antenna 16 for transmission, thereby realizing the SRS4 polling operation of the frequency band.

[0120] In a specific example, when using the connection form shown in FIG7 ,

[0121] The first combiner 21 diverts the third RF signal and the fourth RF signal received by the first antenna 3 to a third signal processing path for signal processing or the first double-pole double-throw switch 1 respectively; the third signal processing path transmits the third RF signal to the RF transceiver 11 for reception and demodulation.

[0122] The second combiner 22 diverts the second RF signal and the fourth RF signal received by the third antenna 5 to the second double-pole double-throw switch 2 or the fourth signal processing path for signal processing, respectively. The fourth signal processing path then transmits the third RF signal to the RF transceiver 11 for reception and demodulation. After the second RF signal is switched to the second signal processing path via the second double-pole double-throw switch 2 for signal processing, the RF transceiver 11 receives and demodulates the second RF signal. After the fourth RF signal is switched to the first signal processing path via the second double-pole double-throw switch 2 and the first double-pole double-throw switch 1 for signal processing, the RF transceiver 11 receives and demodulates the second RF signal.

[0123] When a signal needs to be transmitted, the third RF signal is transmitted by the RF transceiver 11, processed by the third signal processing path, and then transmitted to the first combiner 21; the fourth RF signal is transmitted by the RF transceiver 11, passes through the amplifier and the first signal processing path, and is switched to the first combiner 21 via the first double-pole double-throw switch 1; the first combiner 21 combines the first RF signal and the third RF signal to the first antenna 3 for transmission.

[0124] The third RF signal is transmitted by the RF transceiver 11, and is transmitted to the second combiner 22 after signal processing through the fourth signal processing path; the third RF signal is transmitted by the RF transceiver 11, passes through the amplifier and the third signal processing path, and is switched to the second combiner 22 via the second double-pole double-throw switch 2; the second combiner 22 combines the second RF signal and the fourth RF signal to the third antenna 5 for transmission.

[0125] At this time, the third RF signal and the fourth RF signal can be combined and received through the first antenna 3 at the same time, and the second RF signal and the third RF signal can be combined and received through the third antenna 5 at the same time to achieve a 2*2 Mimo combination of any CA in the high, medium and low frequency bands.

[0126] In addition, in this example, the first radio frequency signal can also be transmitted and received through the second antenna 4 and the third antenna 5 , and the second radio frequency signal can also be transmitted and received through the second antenna 4 .

[0127] In another specific example, when using the connection form shown in Figure 8, the fourth RF signal is transmitted and received by the fifth antenna 20, the first RF signal can be transmitted and received through the first antenna 3, the third RF signal can be transmitted and received through the second antenna 4, and the second RF signal can be transmitted and received through the third antenna 5, thereby realizing simultaneous reception of 4 Mimo channels.

[0128] It is understandable that, depending on actual conditions, the combined reception of the first RF signal and the third RF signal can be achieved through the first combiner 21. The first RF signal can also be transmitted and received through the third antenna 5.

[0129] The combined transceiver modes of the radio frequency signals are not limited to those summarized in the above specific embodiments, and different selections need to be made according to actual conditions.

[0130] In summary, the present invention utilizes a first double-pole double-throw switch 1 and a second double-pole double-throw switch 2 to perform signal switching. Signals of different standards and frequency bands can be received through different antennas, achieving an arbitrary CA combination design for low, medium, and high-frequency signals. This avoids the signal inter-winding issues and high PCB trace insertion loss that may result from using 3P3T, 4P4T, or other multi-pole multi-throw switches. Furthermore, by adding signal processing pathways, antennas, and signal switching devices, a single-band 4*4 Mimo combination and an arbitrary CA 2*2 Mimo combination are achieved, adapting to more complex antenna transceiver environments.

Claims

1. A combined signal processing circuit for transmitting and receiving, characterized in that: including a radio frequency transceiver, a first double-pole double-throw switch, a second double-pole double-throw switch, a first antenna, a second antenna and a third antenna; The first radio frequency signal is received through the first antenna, the second antenna or the third antenna, and is switched to the first signal processing path through the second double-pole double-throw switch and the first double-pole double-throw switch for signal processing; or is directly switched to the first signal processing path through the first double-pole double-throw switch for signal processing, and then the first radio frequency signal is received and demodulated by the radio frequency transceiver; The second RF signal is received through the second antenna or the third antenna, and after being switched to the second signal processing path by the second double-pole double-throw switch for signal processing, the RF transceiver receives and demodulates the first RF signal.

2. The transmit-receive combined signal processing circuit according to claim 1, characterized in that: Also included is a third signal processing path, a third double-pole double-throw switch, and a fourth antenna; The fourth antenna is used to receive the first radio frequency signal or the third radio frequency signal; The third double-pole double-throw switch is used to switch the first radio frequency signal or the third radio frequency signal received through the fourth antenna or the first antenna to the first double-pole double-throw switch or the third signal processing path respectively; The third signal processing path processes the third radio frequency signal and transmits it to the radio frequency transceiver for reception and demodulation.

3. The transmit-receive combined signal processing circuit according to claim 1, characterized in that: Also included is a first combiner; The first combiner divides the third radio frequency signal and the fourth radio frequency signal received by the first antenna into a third signal processing path or the second double-pole double-throw switch respectively; After the third signal processing path processes the third radio frequency signal, the third radio frequency signal is transmitted to the radio frequency transceiver for post-reception demodulation; After the fourth radio frequency signal is switched to the first signal processing path through the second double-pole double-throw switch for signal processing, the fourth radio frequency signal is received and demodulated by the radio frequency transceiver.

4. The transmit-receive combined signal processing circuit according to claim 3, characterized in that: Also includes a second combiner and a fourth signal processing path; The second combiner shunts the second RF signal and the fourth RF signal received by the third antenna to the second double-pole double-throw switch, and shunts the third RF signal to the fourth RF signal processing path; the fourth signal processing path transmits the third RF signal to the RF transceiver for post-reception demodulation; After the second RF signal is switched to the second signal processing path through the second double-pole double-throw switch for signal processing, the second RF signal is received and demodulated by the RF transceiver; After the fourth radio frequency signal is switched to the first signal processing path through the second double-pole double-throw switch and the first double-pole double-throw switch for signal processing, the second radio frequency signal is received and demodulated by the radio frequency transceiver.

5. The transmit-receive combined signal processing circuit according to claim 3, characterized in that: Also included is a fifth antenna; After the fifth antenna receives the third radio frequency signal, the third radio frequency signal is processed by the fourth signal processing path, and then the radio frequency transceiver receives and demodulates the third radio frequency signal.

6. The combined signal processing circuit for transmitting and receiving signals according to claim 2, 3 or 4, characterized in that: The second signal processing path, the third signal processing path, and the fourth signal processing path include a single-pole multi-throw switch and at least one filter; The single-pole multi-throw switch switches the frequency band of the radio frequency signal, and transmits the signal of each frequency band to the corresponding filter for filtering, and the filter transmits the radio frequency signal to the radio frequency transceiver.

7. The transmit-receive combined signal processing circuit according to claim 1, characterized in that: The first signal processing path includes a duplexer; The duplexer is used to filter the first radio frequency signal and transmit the filtered first radio frequency signal to the The frequency signal is transmitted to the radio frequency transceiver.

8. The transmitting and receiving combined signal processing circuit according to claim 7, characterized in that: Also included is an amplifier; The amplifier amplifies the radio frequency signal transmitted by the radio frequency transceiver and transmits the amplified signal to the second signal processing path and the first signal processing path.

9. A method for processing a combined transceiver signal, using the combined transceiver signal processing circuit of any one of claims 1 to 8, characterized in that: The method comprises: The first radio frequency signal is received through the first antenna, the second antenna or the third antenna, and is switched to the first signal processing path through the second double-pole double-throw switch and the first double-pole double-throw switch, and the first signal processing path processes the first radio frequency signal; or the first radio frequency signal is directly switched to the first signal processing path through the first double-pole double-throw switch for signal processing, and then the first radio frequency signal is received and demodulated by the radio frequency transceiver; The second RF signal is received through the second antenna or the third antenna, and after being switched to the second signal processing path by the second double-pole double-throw switch for signal processing, the RF transceiver receives and demodulates the first RF signal.

10. The method for processing a combined transmitting and receiving signal according to claim 9, wherein: The first RF signal is transmitted by the RF transceiver, passes through an amplifier, the first signal processing path, and the first double-pole double-throw switch, and the first double-pole double-throw switch switches the first RF signal to the first antenna or the second antenna for transmission; or is transmitted by the RF transceiver, passes through an amplifier, the first signal processing path, the first double-pole double-throw switch, and the second double-pole double-throw switch, and then switches to the second antenna or the third antenna for transmission; The second radio frequency signal is transmitted by the radio frequency transceiver, and is switched to the second antenna or the third antenna for transmission after passing through the amplifier, the second signal processing path and the second double-pole double-throw switch.

11. The method for processing a combined transmitting and receiving signal according to claim 9 or 10, characterized in that: The first antenna or the fourth antenna receives the first radio frequency signal or the third radio frequency signal respectively, and switches the first radio frequency signal or the third radio frequency signal to the first double-pole double-throw switch respectively via the third double-pole double-throw switch. The double-throw switch or the third signal processing path performs signal processing, and the third signal processing path transmits the third radio frequency signal to the radio frequency transceiver for post-reception demodulation.

12. The method for processing a combined transmitting and receiving signal according to claim 11, wherein: The third radio frequency signal is transmitted by the radio frequency transceiver, and after being processed by the third signal processing path, the third double-pole double-throw switch switches the third radio frequency signal to the first antenna for transmission; The first RF signal is transmitted by the RF transceiver, passes through the amplifier and the first signal processing path, and is switched to the third double-pole double-throw switch via the first double-pole double-throw switch, and the third double-pole switch switches the first RF signal to the first antenna or the third antenna for transmission; or is switched to the second double-pole double-throw switch via the first double-pole double-throw switch, and the second double-pole switch switches the first RF signal to the second antenna or the fourth antenna for transmission.

13. The method for processing a combined transmitting and receiving signal according to claim 9 or 10, characterized in that: The first combiner diverts the third RF signal and the fourth RF signal received by the first antenna to the third signal processing path or the first double-pole double-throw switch respectively; after the third signal processing path processes the third RF signal, the fourth RF signal is transmitted to the RF transceiver for post-reception demodulation.

14. The method for processing a combined transmitting and receiving signal according to claim 13, wherein: The third RF signal is transmitted by the RF transceiver, and is transmitted to the first combiner after being processed by a third signal processing path; The fourth radio frequency signal is transmitted by the radio frequency transceiver, passes through the amplifier and the first signal processing path, and is switched to the first combiner via the first double-pole double-throw switch; The first combiner combines the third radio frequency signal and the fourth radio frequency signal to the first antenna for transmission.

15. The method for processing a combined transmitting and receiving signal according to claim 13, wherein: The second combiner divides the second RF signal and the fourth RF signal received by the third antenna to the second double-pole double-throw switch, and divides the third RF signal to the fourth RF signal processing path; The fourth signal processing path transmits the third RF signal to the RF transceiver for post-reception demodulation; After the second RF signal is switched to the second signal processing path through the second double-pole double-throw switch for signal processing, the second RF signal is received and demodulated by the RF transceiver; After the fourth radio frequency signal is switched to the first signal processing path through the second double-pole double-throw switch and the first double-pole double-throw switch for signal processing, the second radio frequency signal is received and demodulated by the radio frequency transceiver.

16. The method for processing a combined transmitting and receiving signal according to claim 13, wherein: The third radio frequency signal is transmitted by the radio frequency transceiver, and is transmitted to the second combiner after being processed by a fourth signal processing path; The second radio frequency signal is transmitted by the radio frequency transceiver, passes through the amplifier and the third signal processing path, and is switched to the second combiner via the second double-pole double-throw switch; The fourth radio frequency signal is transmitted by the radio frequency transceiver, passes through the amplifier and the third signal processing path, and is then switched to the second combiner via the second double-pole double-throw switch and the first double-pole double-throw switch; The second combiner combines the second RF signal and the third RF signal to the third antenna for transmission.

Images