Co-drive control double-tuning frequency hopping filter

Abstract

The invention provides a co-drive control double-tuned frequency hopping filter. The co-drive control double-tuned frequency hopping filter comprises a duplexer, a frequency hopping filtering module and a drive module, each frequency hopping filtering module comprises two frequency hopping filters; each of the two frequency hopping filters comprises a main line and N paths of resonance units; each driving module comprises a memory, a frequency hopping filtering power supply circuit and N driving units; the driving module receives the address code; the address codes comprise segment selection codes and intra-segment address codes; the frequency hopping filtering power supply circuit switches on a selected frequency hopping filter to supply power according to the segment selection code; the memory outputs corresponding N data bits according to the segment selection code and the in-segment address code; and the N driving units respectively drive the selected frequency hopping filters according to the data bits. According to the frequency hopping filter, a hardware circuit can be remarkably simplified, the driving control number is reduced, the manufacturing cost and the power consumption are reduced, the equipment size is reduced, the two frequency hopping filters of the same frequency hopping filter module can accurately and cooperatively work, signal interference is avoided, and the operation is reliable.

Description

Technical Field

[0001] The present invention relates to the technical field of frequency hopping filtering, and more specifically, to a co-driven control dual-tuned frequency hopping filter. Background Art

[0002] With the rapid development of wireless communication technology, anti-interference ability has become a key challenge in the design of communication systems. As an efficient spectrum management device, the dual-tuned frequency hopping filter has been widely used in modern communication systems because it can quickly switch between two different frequencies and effectively filter out-of-band interference, especially playing an important role in fields such as satellite communication and cognitive radio.

[0003] Traditional implementation schemes of dual-tuned frequency hopping filters usually adopt two sets of independent frequency hopping filtering modules; each set of frequency hopping filtering modules respectively has two frequency hopping filters for processing different frequency bands, and each frequency hopping filter is respectively equipped with an independent drive control circuit, that is, four sets of drive control circuits are required. This architecture brings obvious technical problems: First, the four sets of independent drive control circuits increase the complexity and hardware cost of the system; second, the coordinated operation between the two frequency hopping filters in the same frequency hopping filtering module depends on complex synchronization control logic, which not only increases the design difficulty but also may lead to switching delay and frequency stability problems; finally, the power consumption and volume of multiple sets of circuits also limit their application in miniaturized and low-power devices. Therefore, how to simplify the control circuit of the dual-tuned frequency hopping filter, improve the system integration and reliability, has become an urgent problem to be solved in the current technical field. Summary of the Invention

[0004] To overcome the disadvantages and deficiencies in the prior art, the object of the present invention is to provide a co-driven control dual-tuned frequency hopping filter; this frequency hopping filter can significantly simplify the hardware circuit, reduce the number of drive controls, reduce the manufacturing cost and power consumption, reduce the volume of the device, enable the two frequency hopping filters in the same frequency hopping filtering module to work precisely in coordination, avoid signal interference, and operate reliably.

[0005] To achieve the above object, the present invention is realized by the following technical solutions: A co-driven control dual-tuned frequency hopping filter includes a duplexer, more than one frequency hopping filtering module, and a number of drive modules equal to the number of frequency hopping filtering modules; Each frequency hopping filtering module includes two frequency hopping filters respectively used for processing radio frequency signals of different frequency bands; the input end of the duplexer is connected to the input antenna; the two output ends of the duplexer are respectively connected to the frequency hopping filters corresponding to the frequency bands; the two frequency hopping filters of each frequency hopping filtering module are connected to the output antenna through a one-to-two switch; In each frequency hopping filter module, the two frequency hopping filters each include a main circuit and N resonance units sequentially connected to the main circuit; each driving module includes a memory, a frequency hopping filter power supply circuit, and N driving units; The driving module receives an address code; the address code includes a selection code for selecting a frequency hopping filter and an M-bit in-segment address code for including the to-be-adjusted center frequency F O information; the frequency hopping filter power supply circuit conducts power supply to the selected frequency hopping filter according to the selection code and shuts off the power supply of the other frequency hopping filter; the memory outputs corresponding N-bit data bits according to the selection code and the in-segment address code, and the N-bit data bits respectively correspond to the N driving units one by one; the N driving units respectively drive the N driving units of the selected frequency hopping filter according to the corresponding data bits.

[0006] The present invention can quickly switch between two frequency bands. By controlling the on / off of the power supply of the two frequency hopping filters respectively, the frequency hopping filter corresponding to the corresponding frequency band is selected, and the driving module outputs different driving combinations corresponding to different frequency bands to achieve co-driving, which can significantly simplify the hardware circuit, reduce the number of driving controls, and reduce the volume of the device; it can enable the two frequency hopping filters in the same frequency hopping filter module to adopt a synchronous control logic to achieve precise collaborative work. Only the selected frequency hopping filter in the two frequency hopping filters of the same frequency hopping filter module is powered on and operates, which can avoid signal interference generated by the other frequency hopping filter. The selection code is introduced into the address code to include frequency band information, and the data bits corresponding to different frequency bands and each in-segment address code can be obtained according to the address code, which simplifies the software algorithm and at the same time maintains the flexibility and accuracy of the system; this not only improves the reliability and efficiency of the system, but also reduces the manufacturing cost and power consumption, providing a more optimized solution for the application of the dual-tuned frequency hopping filter.

[0007] When there are multiple frequency hopping filter modules, the number of driving modules is the same as that of the frequency hopping filter modules; each frequency hopping filter module is independent of each other and does not interfere with each other, ensuring the flexibility and reliability of the system.

[0008] Preferably, in the address code, the selection code is set to 0 or 1 to respectively represent the corresponding two frequency hopping filters; The in-segment address code is: ; wherein, F high and F low respectively represent the highest-end frequency and the lowest-end frequency of the frequency hopping filter; HOP step represents the frequency hopping step number; ROUND represents the rounding function; then the in-segment address code is converted into an M-bit binary representation.

[0009] This method uses a unified calculation formula to determine the in-segment address code, simplifies the control algorithm, and improves the consistency of the system.

[0010] Preferably, the frequency-hopping filtering power supply circuit includes a NAND gate for transmitting a selected signal, and two conduction units respectively corresponding to two frequency-hopping filters one by one; Each conduction unit includes a field-effect transistor VQ101, a triode VQ102, a resistor R101, and a capacitor C112; the gate of the field-effect transistor VQ101 is connected to the base of the field-effect transistor and is connected to the output end of the NAND gate to receive the output signal of the NAND gate; the drain of the field-effect transistor VQ101 is connected to the power supply, and the source is connected to the power supply terminals of the respective driving units of the corresponding frequency-hopping filter; the source of the field-effect transistor VQ101 is also connected to the collector of the triode V102; the emitter of the triode V102 is grounded; The NAND gate outputs a signal according to the selection code, making the selected conduction unit conduct and the other conduction unit turn off, thereby conducting the power supply of the selected frequency-hopping filter and turning off the power supply of the other frequency-hopping filter.

[0011] This frequency-hopping filtering power supply circuit can realize the power supply switching of two frequency-hopping filters and effectively supply power to the resonant unit, improving the flexibility and reliability of the device.

[0012] Preferably, the i-th (i = 0, …, N - 1) driving circuit includes a resistor R5i, a resistor R6i, a resistor R7i, a resistor R8i, a triode VQ1i, a triode VQ2i, and a triode VQ3i; The memory data bit output terminal Di is connected to the base of the triode VQ3i through the resistor R7i and is connected to the base of the triode VQ2i through the resistor R8i; the emitters of the triode VQ3i and the triode VQ2i are respectively grounded; the collector of the triode VQ3i is connected to the power supply through the resistor R6i and is connected to the base of the triode VQ1i; the collector of the triode VQ1i is connected to the power supply through the resistor R5i; the emitter of the triode VQ1i is connected to the collector of the triode VQ2i and is respectively connected to the i-th resonant unit control terminal HAi of the two frequency-hopping filters. This driving circuit can effectively drive the resonant unit.

[0013] Preferably, the i-th (i = 0, …, N - 1) resonant unit includes a resistor R1i, a resistor R2i, a resistor R3i, a resistor R4i, a capacitor C1i, a capacitor C2i, a capacitor C3i, a diode VD1i, and a diode VD2i; The i-th resonant unit control terminal HAi is grounded through the resistor R1i, the resistor R2i, the diode VD1i, and the capacitor C1i connected in series in sequence; the connection between the resistor R1i and the resistor R2i is connected to the connection between the diode VD1i and the capacitor C1i; The power supply terminal of the i-th driving unit is grounded through a resistor R3i, a resistor R4i, a diode VD2i, and a capacitor C2i connected in series in sequence; the connection between the resistor R3i and the resistor R4i is connected to the connection between the diode VD2i and the capacitor C2i; The connection between the resistor R2i and the diode VD1i is connected to the connection between the resistor R4i and the diode VD2i, and is connected to the main line through a capacitor C3i.

[0014] Preferably, the two output terminals of the duplexer are respectively connected through hopping filters corresponding to frequency bands of a matching circuit.

[0015] Preferably, the matching circuit includes a capacitor C104, an inductor L105, and a capacitor C105 connected in series in sequence.

[0016] Preferably, there are two or more hopping filter modules; the two hopping filters of each hopping filter module are respectively a hopping filter one and a hopping filter two; the processing frequency bands of all the hopping filters one are the same; the processing frequency bands of all the hopping filters two are the same; and the processing frequency band of the hopping filter one does not overlap with the processing frequency band of the hopping filter two.

[0017] Compared with the prior art, the present invention has the following advantages and beneficial effects: 1. The present invention can quickly switch between two frequency bands. By controlling the power supply of the hopping filter to be turned on and off respectively, the hopping filter corresponding to the selected frequency band is selected, and the driving module outputs different driving combinations corresponding to different frequency bands to achieve co-driving, which can significantly simplify the hardware circuit, reduce the number of driving controls, and reduce the volume of the device; the synchronous control logic can be adopted between the two hopping filters of the same hopping filter module to achieve precise cooperative work; only the selected hopping filter in the two hopping filters of the same hopping filter module is powered on and operates, which can avoid signal interference generated by the other hopping filter; the segment selection code is introduced into the address code to include frequency band information, and the data bits corresponding to different frequency bands and the address codes within each segment can be obtained according to the address code, which simplifies the software algorithm and at the same time maintains the flexibility and precision of the system; this not only improves the reliability and efficiency of the system, but also reduces the manufacturing cost and power consumption, providing a more optimized solution for the application of the dual-tuned hopping filter; 2. In the present invention, when there are multiple hopping filter modules, the number of driving modules is the same as that of the hopping filter modules; each hopping filter module is independent of each other and does not interfere with each other, ensuring the flexibility and reliability of the system; 3. In the present invention, the hopping filter power supply circuit can realize the power supply switching of the two hopping filters and effectively supply power to the resonant unit, improving the flexibility and reliability of the device; 4. In the present invention, a unified calculation formula is adopted to determine the address code within the segment, which simplifies the control algorithm and improves the consistency of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the system block diagram of the co-driven control dual-tuned frequency-hopping filter of the present invention; Figure 2 is the circuit schematic diagram of the duplexer and the frequency-hopping filtering module of the co-driven control dual-tuned frequency-hopping filter of the present invention; Figure 3 is the circuit schematic diagram of a single frequency-hopping filter of the co-driven control dual-tuned frequency-hopping filter of the present invention; Figure 4 is the circuit schematic diagram of the resonant unit of the co-driven control dual-tuned frequency-hopping filter of the present invention; Figure 5 is the circuit schematic diagram of the frequency-hopping filtering power supply circuit of the co-driven control dual-tuned frequency-hopping filter of the present invention; Figure 6 is the schematic diagram of the memory of the co-driven control dual-tuned frequency-hopping filter of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0019] The present invention will be further described in detail below in conjunction with the drawings and the detailed description of the invention.

[0020] Embodiment 1 In this embodiment, a co-driven control dual-tuned frequency-hopping filter, as Figures 1 to 6 shown, includes a duplexer, two frequency-hopping filtering modules, and two driving modules.

[0021] Each frequency-hopping filtering module includes two frequency-hopping filters respectively used for processing radio frequency signals of different frequency bands; the input end of the duplexer is connected to the input antenna; the two output ends of the duplexer are respectively connected to the frequency-hopping filters corresponding to the frequency bands; the two frequency-hopping filters of each frequency-hopping filtering module are connected to the output antenna through a one-for-two switch.

[0022] In this embodiment, the two frequency-hopping filters of each frequency-hopping filtering module are respectively a frequency-hopping filter one and a frequency-hopping filter two; the processing frequency bands of the frequency-hopping filter one are the same, which is 108 - 174 MHz; the processing frequency bands of all the frequency-hopping filter twos are the same, which is 225 - 512 MHz. In actual applications, other frequency bands can also be used, but the processing frequency bands of the frequency-hopping filter one and the frequency-hopping filter two do not overlap.

[0023] The two output ends of the duplexer are preferably respectively connected to the frequency-hopping filters corresponding to the frequency bands through a matching circuit. The matching circuit includes a capacitor C104, an inductor L105, and a capacitor C105 connected in series in sequence.

[0024] In each frequency hopping filter module, the two frequency hopping filters each include a main circuit and N resonance units connected to the main circuit in sequence; each drive module includes a memory, a frequency hopping filter power supply circuit, and N drive units.

[0025] In this embodiment, the number N of resonance units and drive units is taken as ten for illustration respectively.

[0026] The i-th (i = 0, …, 9) resonance unit includes a resistor R1i, a resistor R2i, a resistor R3i, a resistor R4i, a capacitor C1i, a capacitor C2i, a capacitor C3i, a diode VD1i, and a diode VD2i; the control terminal HAi of the i-th resonance unit is grounded through the resistor R1i, the resistor R2i, the diode VD1i, and the capacitor C1i connected in series in sequence; the connection between the resistor R1i and the resistor R2i is connected to the connection between the diode VD1i and the capacitor C1i; the power supply terminal of the i-th drive unit is grounded through the resistor R3i, the resistor R4i, the diode VD2i, and the capacitor C2i connected in series in sequence; the connection between the resistor R3i and the resistor R4i is connected to the connection between the diode VD2i and the capacitor C2i; the connection between the resistor R2i and the diode VD1i is connected to the connection between the resistor R4i and the diode VD2i, and is connected to the main circuit through the capacitor C3i.

[0027] The i-th (i = 0, …, 9) drive circuit includes a resistor R5i, a resistor R6i, a resistor R7i, a resistor R8i, a triode VQ1i, a triode VQ2i, and a triode VQ3i; the data bit output terminal Di of the memory is connected to the base of the triode VQ3i through the resistor R7i, and is connected to the base of the triode VQ2i through the resistor R8i; the emitters of the triode VQ3i and the triode VQ2i are grounded respectively; the collector of the triode VQ3i is connected to the power supply through the resistor R6i and is connected to the base of the triode VQ1i; the collector of the triode VQ1i is connected to the power supply through the resistor R5i; the emitter of the triode VQ1i is connected to the collector of the triode VQ2i, and is respectively connected to the control terminal HAi of the i-th resonance unit of the two frequency hopping filters. This drive circuit can effectively drive the resonance unit.

[0028] The drive module receives an address code; the address code includes a selection code for selecting a frequency hopping filter and an M-bit segment internal address code for including the to-be-adjusted center frequency F O information.

[0029] In the address code, the selection code (A8) is set to 0 or 1 to respectively represent the corresponding two frequency hopping filters; The segment internal address code (A0 - A7) is: ; wherein, F high and F lowrespectively represent the highest and lowest frequencies of the frequency hopping filter; HOP step represents the frequency hopping step number; ROUND represents the rounding function; then the in-segment address code is converted into an M-bit binary representation.

[0030] For example, the frequency band of frequency hopping filter one is 108 - 174 MHz, A8 = 0; In-segment address code (A0 - A7) = (F O - 108) / (174 - 108) × 250; when F O = 174 MHz, the in-segment address code = 250 = 11111010; The frequency band of frequency hopping filter two is 225 - 512 MHz, A8 = 0; In-segment address code (A0 - A7) = (F O - 225) / (512 - 225) × 250; when F O = 512 MHz, the in-segment address code = 250 = 11111010.

[0031] This method uses a unified calculation formula to determine the in-segment address code, simplifies the control algorithm, and improves the consistency of the system.

[0032] The frequency hopping filter power supply circuit conducts the power supply of the selected frequency hopping filter according to the selected segment code, and shuts off the power supply of the other frequency hopping filter.

[0033] Specifically, the frequency hopping filter power supply circuit includes a NAND gate for sending a selected signal, and two conduction units respectively corresponding to the two frequency hopping filters one by one; Each conduction unit includes a field effect transistor VQ101, a triode VQ102, a resistor R101, and a capacitor C112; the gate of the field effect transistor VQ101 is connected to the base of the field effect transistor and is connected to the output terminal of the NAND gate to receive the output signal of the NAND gate; the drain of the field effect transistor VQ101 is connected to the power supply, and the source is connected to the power supply terminals of the respective driving units of the corresponding frequency hopping filter; the source of the field effect transistor VQ101 is also connected to the collector of the triode V102; the emitter of the triode V102 is grounded; The NAND gate outputs a signal according to the selected segment code, making the selected conduction unit conduct and the other conduction unit turn off, thereby conducting the power supply of the selected frequency hopping filter and shutting off the power supply of the other frequency hopping filter. This frequency hopping filter power supply circuit can realize the power supply switching of two frequency hopping filters, improving the flexibility and reliability of the device.

[0034] The memory outputs the corresponding N-bit data bits according to the selected segment code and the in-segment address code, and the N-bit data bits respectively correspond to the N driving units one by one; the N driving units respectively drive the N driving units of the selected frequency hopping filter according to the corresponding data bits.

[0035] According to the correspondence information between the address code and the frequency, the frequency-hopping filter data (D0-D9) is stored in the memory in advance. The external interface issues the address code, and the memory outputs data bits to control the drive unit to select the corresponding frequency points.

[0036] The present invention can quickly switch between two frequency bands. By controlling the power supply on and off of two frequency-hopping filters respectively, the frequency-hopping filter corresponding to the selected frequency band is selected, and the drive module outputs drive combinations corresponding to different frequency bands to achieve co-driving, which can significantly simplify the hardware circuit, reduce the number of drive controls, and reduce the volume of the device. Only the selected frequency-hopping filter in the two frequency-hopping filters is powered on and operates, which can avoid signal interference generated by the other frequency-hopping filter. A segment selection code is introduced into the address code to include frequency band information. The data bits corresponding to different frequency bands and the address codes within each segment can be obtained according to the address code, which simplifies the software algorithm and at the same time maintains the flexibility and accuracy of the system; this not only improves the reliability and efficiency of the system, but also reduces the manufacturing cost and power consumption, providing a more optimized solution for the application of the dual-tuned frequency-hopping filter.

[0037] When there are multiple frequency-hopping filter modules, the number of drive modules is the same as that of the frequency-hopping filter modules; each frequency-hopping filter module is independent of each other and does not interfere with each other, ensuring the flexibility and reliability of the system.

[0038] Embodiment 2 A co-drive control dual-tuned frequency-hopping filter in this embodiment is different from that in Embodiment 1 in that: in this embodiment, the number of frequency-hopping filter modules and drive modules is one respectively, or more than three, such as three, four, or even more. The rest of the structure of this embodiment is the same as that of Embodiment 1.

[0039] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention shall be equivalent replacement methods and shall be included in the protection scope of the present invention.

Claims

1. A co-driven control dual-tuned frequency hopping filter, characterized in that: It includes a duplexer, more than one frequency hopping filter module, and a number of drive modules equal to the number of frequency hopping filter modules; Each frequency hopping filter module includes two frequency hopping filters respectively used for processing radio frequency signals of different frequency bands; the input end of the duplexer is connected to the input antenna; the two output ends of the duplexer are respectively connected to the frequency hopping filters corresponding to the frequency bands; the two frequency hopping filters of each frequency hopping filter module are connected to the output antenna through a two-way switch; In each frequency hopping filter module, both of the two frequency hopping filters include a main line and N resonance units connected to the main line in sequence; each drive module includes a memory, a frequency hopping filter power supply circuit, and N drive units; The driving module receives an address code; the address code includes a selection code for selecting a frequency-hopping filter and an in-segment address code for including the center frequency F to be adjusted O in the M-bit segment of the information; the frequency-hopping filter power supply circuit conducts the power supply of the selected frequency-hopping filter according to the selection code and turns off the power supply of the other frequency-hopping filter; the memory outputs corresponding N-bit data bits according to the selection code and the in-segment address code, and the N-bit data bits correspond to N driving units one by one; the N driving units respectively drive the N driving units of the selected frequency-hopping filter according to the corresponding data bits.

2. The co-driven control dual-tuned frequency hopping filter according to claim 1, wherein: In the address code, the segment selection code is set to 0 or 1 to respectively represent the corresponding two frequency hopping filters; The in-segment address code is: ； Among them, F high and F low represent the highest frequency and the lowest frequency of the frequency hopping filter respectively; HOP step represents the frequency hopping step number; ROUND represents the rounding function; then the in-segment address code is converted into an M-bit binary representation.

3. The co-driven control dual-tuned frequency hopping filter according to claim 1, wherein: The frequency hopping filter power supply circuit includes a NAND gate for sending a selected signal, and two conduction units respectively corresponding to the two frequency hopping filters one by one; Each conduction unit includes a field effect transistor VQ101, a triode VQ102, a resistor R101, and a capacitor C112; the gate of the field effect transistor VQ101 is connected to the base of the field effect transistor and is connected to the output end of the NAND gate to receive the output signal of the NAND gate; the drain of the field effect transistor VQ101 is connected to the power supply, and the source is connected to the power supply terminals of the respective drive units of the corresponding frequency hopping filter; the source of the field effect transistor VQ101 is also connected to the collector of the triode V102; the emitter of the triode V102 is grounded; The NAND gate outputs a signal according to the segment selection code, making the selected conduction unit conduct and the other conduction unit turn off, thereby conducting the power supply of the selected frequency hopping filter and turning off the power supply of the other frequency hopping filter.

4. The co-driven control dual-tuned frequency hopping filter according to claim 3, wherein: The i-th (i = 0, …, N - 1) drive circuit includes a resistor R5i, a resistor R6i, a resistor R7i, a resistor R8i, a triode VQ1i, a triode VQ2i, and a triode VQ3i; The data bit output terminal Di of the memory is connected to the base of the triode VQ3i through the resistor R7i and is connected to the base of the triode VQ2i through the resistor R8i; the emitters of the triode VQ3i and the triode VQ2i are respectively grounded; the collector of the triode VQ3i is connected to the power supply through the resistor R6i and is connected to the base of the triode VQ1i; the collector of the triode VQ1i is connected to the power supply through the resistor R5i; the emitter of the triode VQ1i is connected to the collector of the triode VQ2i and is respectively connected to the control terminal HAi of the i-th resonance unit of the two frequency hopping filters.

5. The co-driven control dual-tuned frequency hopping filter according to claim 4, wherein: The i-th (i = 0, …, N - 1) resonance unit includes a resistor R1i, a resistor R2i, a resistor R3i, a resistor R4i, a capacitor C1i, a capacitor C2i, a capacitor C3i, a diode VD1i, and a diode VD2i; The control terminal HAi of the i-th resonance unit is grounded through the resistor R1i, the resistor R2i, the diode VD1i, and the capacitor C1i connected in series in sequence; the connection between the resistor R1i and the resistor R2i is connected to the connection between the diode VD1i and the capacitor C1i; The power supply terminal of the i-th driving unit is grounded through a resistor R3i, a resistor R4i, a diode VD2i, and a capacitor C2i connected in series in sequence; the connection between the resistor R3i and the resistor R4i is connected to the connection between the diode VD2i and the capacitor C2i; The connection between the resistor R2i and the diode VD1i is connected to the connection between the resistor R4i and the diode VD2i, and is connected to the main line through a capacitor C3i.

6. The co-driven control dual-tuned frequency hopping filter according to claim 1, wherein: The two output terminals of the duplexer are respectively connected through the hopping filters corresponding to the frequency bands of the matching circuit.

7. The co-driven control dual-tuned frequency hopping filter according to claim 6, characterized in that: The matching circuit includes a capacitor C104, an inductor L105, and a capacitor C105 connected in series in sequence.

8. The co-driven control dual-tuned frequency hopping filter according to claim 1, wherein: There are two or more hopping filter modules; the two hopping filters of each hopping filter module are respectively a hopping filter one and a hopping filter two; the processing frequency bands of all the hopping filters one are the same; the processing frequency bands of all the hopping filters two are the same; and the processing frequency band of the hopping filter one does not overlap with the processing frequency band of the hopping filter two.

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