CN113872902B

CN113872902B - Signal modulation circuit, method and related product

Info

Publication number: CN113872902B
Application number: CN202010615453.0A
Authority: CN
Inventors: 帅松林; 张健; 蔡华; 王光健
Original assignee: Huawei Technologies Co Ltd; Hangzhou Dianzi University
Current assignee: Huawei Technologies Co Ltd; Hangzhou Dianzi University
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2023-04-07
Anticipated expiration: 2040-06-30
Also published as: WO2022002171A1; CN113872902A

Abstract

The embodiment of the application provides a signal modulation circuit, a method and a related product, wherein the circuit comprises: the first modulation unit is used for receiving a first original carrier signal and a first modulation signal, and performing first modulation on the first original carrier signal according to the first modulation signal to obtain a first carrier signal and/or a second carrier signal; the second modulation unit is used for carrying out second modulation on the first carrier signal or the second carrier signal according to the first modulation signal to obtain a first modulated signal; or performing third modulation on the first carrier signal or the second carrier signal according to the first modulation signal to obtain a second modulated signal. By adopting the embodiment of the application, the direct modulation of millimeter waves can be realized, the transmitter architecture can be greatly simplified, the power consumption of the transmitter is reduced, and the realization of chip is easy.

Description

Signal modulation circuit, method and related product

Technical Field

The present application relates to the field of communications technologies, and in particular, to a signal modulation circuit, a signal modulation method, and a related product.

Background

With the rapid development of technologies such as 5G networks, VR equipment, ultra-high definition videos and intelligent wearable equipment, people put higher requirements on the rate and capacity of information transmission; although the peak rate of 5G access is 1-20 Gbit/s, the requirement of increasing data traffic in future wireless communication cannot be met. Meanwhile, with the continuous development of wireless communication technology, high-frequency and high-speed applications are increasingly demanded, so that the power consumption of a wireless communication system is also increasingly high, and the demand for a low-cost and high-energy-efficiency wireless transceiver is also continuously increased.

A radio transceiver is an important component of a radio communication system, and a typical transmitter includes a code modulation module, a Digital-to-Analog Converter (DAC), a frequency conversion and amplification module, and an antenna radiation module, as shown in fig. 1.

Millimeter wave (mmW) technology can provide richer spectrum resources and higher transmission rate, and brings new vitality and more choices for wireless communication. However, bottlenecks of the current DAC + RF frequency conversion scheme in power consumption, modulation bandwidth, and millimeter wave frequency band are more and more obvious, and direct modulation of millimeter waves cannot be realized, so that application of large-bandwidth millimeter waves is blocked.

Disclosure of Invention

The embodiment of the application discloses a signal modulation circuit, a signal modulation method and a related product, which can realize direct modulation of millimeter waves, greatly simplify the structure of a transmitter, reduce the power consumption of the transmitter and are easy to realize in a chip mode.

A first aspect of an embodiment of the present application discloses a signal modulation circuit, including: the first modulation unit is used for receiving a first original carrier signal and a first modulation signal, and performing first modulation on the first original carrier signal according to the first modulation signal to obtain a first carrier signal and/or a second carrier signal; the second modulation unit is used for carrying out second modulation on the first carrier signal or the second carrier signal according to the first modulation signal to obtain a first modulated signal; or performing third modulation on the first carrier signal or the second carrier signal according to the first modulation signal to obtain a second modulated signal.

It can be seen that, in the signal modulation circuit provided in the embodiment of the present application, after receiving the first original carrier signal and the first modulation signal, the first modulation unit performs first modulation on the first original carrier signal according to the first modulation signal to obtain the first carrier signal and/or the second carrier signal; the second modulation unit carries out second modulation on the first carrier signal or the second carrier signal according to the first modulation signal to obtain a first modulated signal, or carries out third modulation on the first carrier signal or the second carrier signal according to the first modulation signal to obtain a second modulated signal, so that the first modulation signal is directly loaded into the first modulated signal or the second modulated signal; the modulation circuit is simple and efficient, can greatly simplify the transmitter architecture, reduces the power consumption of the transmitter, and is easy to realize in a chip manner.

In some possible examples, the first carrier signal is pi out of phase with the second carrier signal and the first modulated signal is pi/2 out of phase with the second modulated signal.

As can be seen, in this example, the first modulation unit may shift the phase of the first original carrier signal such that the phase difference between the first carrier signal and the second carrier signal is pi; the second modulation unit may shift the phase of the first carrier signal or the second carrier signal so that a phase difference between the first modulated signal and the second modulated signal is pi/2; because the first modulation can carry out phase shift according to 2 phases, and the second modulation can carry out phase shift according to 2 phases, the first original carrier signal can be directly modulated into a modulated signal with 4 phase differences of pi/2.

In some possible examples, the first modulation unit includes: and the first modulation signal receiving module is used for receiving the first modulation signal.

As can be seen, in this example, the first modulation unit receives the first modulation signal through the first modulation signal receiving module, so as to obtain a first modulation signal for signal modulation, and then modulates according to the first modulation signal, so as to implement modulation on the first carrier signal.

In some possible examples, the first modulation unit further comprises: a first balun configured to receive the first original carrier signal and to convert the first original carrier signal into the first carrier signal and/or the second carrier signal.

As can be seen, in this example, after receiving the first original carrier signal, the first balun converts the first original carrier signal into the first carrier signal and the second carrier signal having the phase difference of pi, so as to shift the phase of the first original carrier signal according to 2 phases.

In some possible examples, the first modulation unit includes a fifth switch, a fifth phase shifter, and a sixth phase shifter, a second terminal of the fifth switch is connected to an input terminal of the fifth phase shifter or an input terminal of the sixth phase shifter, and the fifth phase shifter is connected in parallel to the sixth phase shifter; a first end of the fifth switch is configured to receive the first original carrier signal; the fifth phase shifter is configured to convert the first original carrier signal into the first carrier signal; the sixth phase shifter is configured to convert the first original carrier signal into the second carrier signal.

As can be seen, in this example, after the fifth switch receives the first original carrier signal, the fifth phase shifter is selected to shift the phase of the first original carrier signal according to the phase shift phase of 0, so as to obtain the first carrier signal; selecting a sixth phase shifter to shift the phase of the first original carrier signal according to the phase shift phase of pi, so as to obtain a second carrier signal; therefore, the phase of the first original carrier signal is shifted according to 2 phases, and the first carrier signal and the second carrier signal with the phase difference of pi are obtained.

In some possible examples, the second modulation unit comprises a first bridge comprising 2 legs; the first bridge arm of the first bridge is used for performing first phase shift on the first carrier signal or the second carrier signal according to the first modulation signal to obtain a first modulated signal; and the second bridge arm of the first bridge is used for carrying out second phase shift on the first carrier signal or the second carrier signal according to the first modulation signal to obtain a second modulated signal.

As can be seen, in this example, the second modulation unit includes a first bridge having 2 bridge arms, and the first bridge arm of the first bridge selects the first carrier signal or the second carrier signal according to the first modulation signal to perform the first phase shift, so as to obtain a first modulated signal; selecting the first carrier signal or the second carrier signal to carry out second phase shift according to the first modulation signal through a second bridge arm of the first bridge to obtain a second modulated signal; because the phases of the first carrier signal and the second carrier signal are different, the phase of a first modulated signal obtained by performing first phase shifting on the first carrier signal is different from the phase of a first modulated signal obtained by performing first phase shifting on the second carrier signal, that is, the first modulated signal has 2 phase states; similarly, the phase of the second modulated signal obtained by second phase shifting the first carrier signal is different from the phase of the second modulated signal obtained by second phase shifting the second carrier signal, that is, the second modulated signal has 2 phase states, so that the first bridge can directly modulate to obtain a modulated signal with 4 phase states.

In some possible examples, the second modulation unit further comprises a first switch, a first terminal of the first switch being connected to the first output terminal or the second output terminal of the first balun; or the first end of the first switch is connected with the output end of the fifth phase shifter or the output end of the sixth phase shifter; and the second end of the first switch is connected with the first bridge arm or the second bridge arm of the first bridge.

It can be seen that, in this example, a first switch is disposed in the second modulation unit, a first end of the first switch is optionally connected to the first output end or the second output end of the first balun, or a first end of the first switch is connected to the output end of the fifth phase shifter or the output end of the sixth phase shifter, and a second end of the first switch is optionally connected to the first bridge arm or the second bridge arm of the first bridge; the second modulation unit can select the first carrier signal or the second carrier signal to perform second modulation by controlling the first end of the first switch to select a connection object; the second modulation unit can select a connection object by controlling the second end of the first switch to select a first bridge arm or a second bridge arm of the first bridge to shift the phase of the first carrier signal or the second carrier signal; thereby realizing that the first original carrier signal is directly modulated into the modulated signal of 4 phase states.

In some possible examples, the second modulation unit includes a sixth switch, a seventh phase shifter, and an eighth phase shifter, a first end of the sixth switch is connected to an output end of the seventh phase shifter or an output end of the eighth phase shifter, and the seventh phase shifter is connected in parallel to the eighth phase shifter; the seventh phase shifter is configured to perform a first phase shift on the first carrier signal or the second carrier signal according to the first modulation signal to obtain the first modulated signal; the eighth phase shifter is configured to perform a second phase shift on the first carrier signal or the second carrier signal according to the first modulation signal, so as to obtain the second modulated signal.

As can be seen, in this example, the second modulation unit includes a fourth phase shift module having a seventh phase shifter and an eighth phase shifter, and the seventh phase shifter selects the first carrier signal or the second carrier signal according to the first modulation signal to perform the first phase shift, so as to obtain the first modulated signal; selecting the first carrier signal or the second carrier signal to perform second phase shifting according to the first modulation signal through the eighth phase shifter to obtain a second modulation signal; because the phases of the first carrier signal and the second carrier signal are different, the phase of a first modulated signal obtained by performing first phase shifting on the first carrier signal is different from the phase of a first modulated signal obtained by performing first phase shifting on the second carrier signal, that is, the first modulated signal has 2 phase states; similarly, the second modulated signal obtained by second phase shifting the first carrier signal is different from the second modulated signal obtained by second phase shifting the second carrier signal in phase, that is, the second modulated signal has 2 phase states, so that the modulated signal with 4 phase states can be directly modulated.

In some possible examples, the second modulation unit further comprises a first switch, a first terminal of the first switch being connected to the first output terminal or the second output terminal of the first balun; or the first end of the first switch is connected with the output end of the fifth phase shifter or the output end of the sixth phase shifter; a second terminal of the first switch is connected to an input terminal of the seventh phase shifter or an input terminal of the eighth phase shifter.

It can be seen that in this example, a first switch is disposed in the second modulation unit, a first end of the first switch is optionally connected to the first output terminal or the second output terminal of the first balun, or a first end of the first switch is connected to the output terminal of the fifth phase shifter or the output terminal of the sixth phase shifter, and a second end of the first switch is connected to the input terminal of the seventh phase shifter or the input terminal of the eighth phase shifter; the second modulation unit can select a connection object by controlling the first end of the first switch to select the first carrier signal or the second carrier signal to perform second modulation; the second modulation unit can select a connection object by controlling the second end of the first switch to select the seventh phase shifter or the eighth phase shifter to shift the phase of the first carrier signal or the second carrier signal; thereby realizing that the first original carrier signal is directly modulated into the modulated signal of 4 phase states.

In some possible examples, the first modulation signal has a number of bits of n, where n is an integer equal to or greater than 2, and the second modulation unit further includes n-2 phase shift modules connected in series; the first ends of the n-2 phase shift modules connected in series are connected with the second end of the first switch, the second ends of the n-2 phase shift modules connected in series are connected with the first bridge arm or the second bridge arm of the first bridge, or the second ends of the n-2 phase shift modules connected in series are connected with the input end of the seventh phase shifter or the input end of the eighth phase shifter; each phase shifting module comprises 2 phase shifters and 1 switch, and the 2 phase shifters are connected in parallel and then connected in series with the 1 switch; the first end of the switch in each phase shift module is connected with one of the 2 phase shifters in the adjacent phase shift module, and the second end of the switch in each phase shift module is connected with one of the 2 phase shifters in the adjacent phase shift module.

It can be seen that in this example, n-2 phase shift modules connected in series may be disposed between the first switch and the first bridge, where n is the number of bits of the first modulation signal, each phase shift module includes 2 phase shifters and 1 switch, and the 2 phase shifters are connected in parallel and then connected in series with the 1 switch; for each phase shifting module, one of 2 phase shifters can be selected through a switch to shift the phase of the carrier signal, that is, each phase shifting module can shift the phase of 2 phases of the carrier signal, and n-2 phase shifting modules can shift the phase of 2 phases of the carrier signal n-2 timesPhase (1); because the first balun can perform phase shifting of 2 phases on the carrier signal, and the first bridge or the seventh phase shifter and the eighth phase shifter can also perform phase shifting of 2 phases on the carrier signal, the whole circuit can perform n times of phase shifting of 2 phases on the carrier signal; thus, for a first modulated signal with the number of bits n, after n times of 2 phase shifts are performed on the first original carrier signal according to the first modulated signal, 2 can be obtained by modulation ⁿ And (4) seeding the modulated signal.

In some possible examples, n =3, the second modulation unit further comprises a first phase shifting module comprising a first phase shifter, a second phase shifter, and a second switch; a second terminal of the first switch is connected to an input terminal of the first phase shifter or an input terminal of the second phase shifter; a first end of the second switch is connected to an output end of the first phase shifter or an output end of the second phase shifter, a second end of the second switch is connected to the first bridge arm or the second bridge arm of the first bridge, or a second end of the second switch is connected to an input end of the seventh phase shifter or an input end of the eighth phase shifter.

It can be seen that, in this example, for a 3-bit first modulated signal, 1 phase shift module is provided in the signal modulation circuit, so that 8 modulated signals can be obtained by modulating the first original carrier signal.

In some possible examples, the phase-shifted phase of the first phase shifter is 0 and the phase-shifted phase of the second phase shifter is pi/4.

It can be seen that, in this example, for a 3-bit first modulation signal, 1 phase shift module is provided in the signal modulation circuit, and the phase shift phase of the first phase shifter in the phase shift module is 0, and the phase shift phase of the second phase shifter is pi/4, so that the first original carrier signal can be modulated to obtain 8 modulated signals with a phase difference of pi/4.

In some possible examples, n =4, the second modulation unit further comprising a second phase shifting module comprising a third phase shifter, a fourth phase shifter, and a third switch; a second end of the second switch is connected to an input end of the third phase shifter or an input end of the fourth phase shifter; a first end of the third switch is connected to an output end of the third phase shifter or an output end of the fourth phase shifter, a second end of the third switch is connected to the first bridge arm or the second bridge arm of the first bridge, or a second end of the third switch is connected to an input end of the seventh phase shifter or an input end of the eighth phase shifter.

It can be seen that, in this example, for a 4-bit first modulated signal, 2 phase shift modules are provided in the signal modulation circuit, so that 16 modulated signals can be obtained by modulating the first original carrier signal.

In some possible examples, the third phase shifter has a phase shift of 0 and the fourth phase shifter has a phase shift of pi/8.

As can be seen, in this example, for a 4-bit first modulated signal, 2 phase shift modules are arranged in the signal modulation circuit, and the phase shift phase of the first phase shifter in the first phase shift module is 0, the phase shift phase of the second phase shifter is pi/4, the phase shift phase of the third phase shifter in the second phase shift module is 0, and the phase shift phase of the fourth phase shifter is pi/8, so that 16 modulated signals with a phase difference of pi/8 can be obtained by modulating the first original carrier signal.

In some possible examples, the second modulation unit further includes a first power amplifier, a second power amplifier, a third power amplifier, a fourth power amplifier, a first power divider, and a second power divider; the second modulation unit further comprises a first power amplifier, a second power amplifier, a third power amplifier and a fourth power amplifier; the input end of the first power amplifier is connected with the first output end of the first balun, and the output end of the first power amplifier is connected with the first input end of the first power divider; the input end of the second power amplifier is connected with the second output end of the first balun, and the output end of the second power amplifier is connected with the second input end of the first power divider; the output end of the first power divider is connected with the input end of the second power divider; the input end of the third power amplifier is connected with the first output end of the second power divider, and the output end of the third power amplifier is connected with the first bridge arm of the first bridge; the input end of the fourth power amplifier is connected with the second output end of the second power divider, and the output end of the fourth power amplifier is connected with the second bridge arm of the first bridge.

In this example, it can be seen that, in the process of modulating the carrier signal, different phase shift paths are selected by controlling the on or off of the power amplifier, so that the first original carrier signal is directly modulated into the modulated signal in the 4-phase state, and the power amplifier is used to perform saturation amplification on the signal, which can improve the power and efficiency of the modulator.

In some possible examples, the circuit further comprises: and the third power divider is used for receiving an original carrier signal and dividing the original carrier signal into a first original carrier signal and a second original carrier signal, wherein the first original carrier signal and the second original carrier signal have the same phase and different amplitudes.

As can be seen, in this example, before the first carrier signal is modulated, the original carrier signal is subjected to signal distribution by the third power divider to obtain the first original carrier signal and the second original carrier signal, and then the first carrier signal is modulated, so that the signal modulation circuit may directly modulate the input original carrier signal, or modulate the first carrier signal after the original carrier signal is distributed, that is, the signal modulation circuit may be used as an integral circuit or a branch circuit.

In some possible examples, the circuit further comprises: a third modulation unit, configured to receive the second original carrier signal and a second modulation signal, and perform first modulation on the second original carrier signal according to the second modulation signal to obtain a third carrier signal and/or a fourth carrier signal; a fourth modulation unit, configured to perform second modulation on the third carrier signal or the fourth carrier signal according to the second modulation signal to obtain a third modulated signal; or performing third modulation on the third carrier signal or the fourth carrier signal according to the second modulation signal to obtain a fourth modulated signal; a fifth modulation unit configured to synthesize a fifth modulated signal from the first modulated signal or the second modulated signal and the third modulated signal or the fourth modulated signal.

It can be seen that, in this example, an input original carrier signal is divided into two paths of signals, i.e., a first original carrier signal and a second original carrier signal, the first original carrier signal is modulated to generate a first path of Quadrature Phase Shift Keying (QPSK) signal, the second original carrier signal is modulated to generate a second path of QPSK signal, and the first path of QPSK signal and the second path of QPSK signal are synthesized to generate a path of Quadrature Amplitude Modulation (QAM) signal, so that the signal Modulation circuit can implement QAM signal Modulation.

In some possible examples, the third carrier signal is pi out of phase with the fourth carrier signal, the third modulated signal is pi/2 out of phase with the fourth modulated signal, and the first or second modulated signal differs in amplitude from the third or fourth modulated signal by 1/2.

As can be seen, in this example, the first modulation unit may shift the phase of the first original carrier signal such that the phase difference between the first carrier signal and the second carrier signal is pi; the second modulation unit may shift the phase of the first carrier signal or the second carrier signal, so that a phase difference between the first modulated signal and the second modulated signal is pi/2; because the first modulation can carry out phase shift according to 2 phases, and the second modulation can carry out phase shift according to 2 phases, the first original carrier signal can be directly modulated into a first modulated signal or a second modulated signal with 4 phase differences of pi/2; similarly, the second original carrier signal can be directly modulated into a third modulated signal or a fourth modulated signal with 4 phase differences of pi/2; and the amplitude difference between the first modulated signal or the second modulated signal and the third modulated signal or the fourth modulated signal is 1/2, so that the signal modulation circuit can modulate the original carrier signal into a 16QAM signal through two 4-ary phase shift keying (4-PSK).

In some possible examples, the third modulation unit includes: and the second modulation signal receiving module is used for receiving the second modulation signal.

As can be seen, in this example, the third modulation unit receives the second modulation signal through the second modulation signal receiving module, so as to obtain a second modulation signal for signal modulation, and then modulates according to the second modulation signal, so as to implement modulation on the second carrier signal, and further implement modulation of the original carrier signal into the 16QAM signal.

In some possible examples, the third modulation unit further includes: a second balun, configured to receive the second original carrier signal, and convert the second original carrier signal into the third carrier signal and/or the fourth carrier signal.

As can be seen, in this example, after receiving the second original carrier signal, the second balun converts the second original carrier signal into a third carrier signal and a fourth carrier signal having a phase difference of pi, so as to shift the phase of the second original carrier signal according to 2 phases.

In some possible examples, the fourth modulation unit comprises a second bridge comprising 2 legs; the first bridge arm of the second bridge is configured to perform a first phase shift on the third carrier signal or the fourth carrier signal according to the second modulation signal to obtain a third modulated signal; and the second bridge arm of the second bridge is used for carrying out second phase shift on the third carrier signal or the fourth carrier signal according to the second modulation signal to obtain a fourth modulated signal.

As can be seen, in this example, the fourth modulation unit includes a second bridge having 2 bridge arms, and the third carrier signal or the fourth carrier signal is selected by the first bridge arm of the second bridge according to the second modulation signal to perform the first phase shift, so as to obtain a third modulated signal; selecting a third carrier signal or a fourth carrier signal for second phase shift according to a second modulation signal through a second bridge arm of a second bridge to obtain a fourth modulation signal; because the phases of the third carrier signal and the fourth carrier signal are different, the phase of a third modulated signal obtained by performing the first phase shift on the third carrier signal is different from the phase of a third modulated signal obtained by performing the first phase shift on the fourth carrier signal, that is, the third modulated signal has a 2-phase state; similarly, the phase of the fourth modulated signal obtained by performing the second phase shift on the third carrier signal is different from the phase of the fourth modulated signal obtained by performing the second phase shift on the fourth carrier signal, that is, the fourth modulated signal has 2 phase states, so that the second carrier signal is modulated into the modulated signal in the 4 phase states, and the modulation of the original carrier signal into the 16QAM signal can be realized by combining the modulated signal in the 4 phase states obtained by modulating according to the first carrier signal.

In some possible examples, the fourth modulation unit further includes a fourth switch, a first terminal of the fourth switch is connected to the first output terminal or the second output terminal of the second balun, and a second terminal of the fourth switch is connected to the first leg or the second leg of the second bridge.

It can be seen that in this example, a fourth switch is disposed between the second balun and the second bridge, a first end of the fourth switch is optionally connected to the first output end or the second output end of the second balun, and a second end of the fourth switch is optionally connected to the first leg or the second leg of the second bridge; the third modulation unit can select a connection object by controlling the first end of the fourth switch to select the third carrier signal or the fourth carrier signal to perform second modulation; the fourth modulation unit can select a connection object by controlling the second end of the fourth switch to select the first bridge arm or the second bridge arm of the second bridge to shift the phase of the third carrier signal or the fourth carrier signal, so that the second original carrier signal is directly modulated into a modulated signal in a 4-phase state, and the modulation of the original carrier signal into a 16QAM signal can be realized by combining the modulated signal in the 4-phase state obtained by modulation according to the first carrier signal.

A second aspect of the embodiments of the present application discloses a signal modulation method, including: receiving a first original carrier signal and a first modulation signal, and performing first modulation on the first original carrier signal according to the first modulation signal to obtain a first carrier signal and/or a second carrier signal; performing second modulation on the first carrier signal or the second carrier signal according to the first modulation signal to obtain a first modulated signal; or performing third modulation on the first carrier signal or the second carrier signal according to the first modulation signal to obtain a second modulated signal.

In some possible examples, the second modulating the first carrier signal or the second carrier signal according to the first modulation signal to obtain a first modulated signal includes: and carrying out first phase shift on the first carrier signal or the second carrier signal according to the first modulation signal to obtain the first modulation signal.

In some possible examples, the third modulating the first carrier signal or the second carrier signal according to the first modulating signal to obtain a second modulated signal includes: and carrying out second phase shift on the first carrier signal or the second carrier signal according to the first modulation signal to obtain a second modulation signal.

In some possible examples, the method further comprises: receiving an original carrier signal, and dividing the original carrier signal into a first original carrier signal and a second original carrier signal, wherein the first original carrier signal and the second original carrier signal have the same phase and different amplitudes.

In some possible examples, the method further comprises: receiving the second original carrier signal and a second modulation signal, and performing first modulation on the second original carrier signal according to the second modulation signal to obtain a third carrier signal and/or a fourth carrier signal; performing second modulation on the third carrier signal or the fourth carrier signal according to the second modulation signal to obtain a third modulated signal; or performing third modulation on the third carrier signal or the fourth carrier signal according to the second modulation signal to obtain a fourth modulated signal; synthesizing a fifth modulated signal from the first or second modulated signal and the third or fourth modulated signal.

In some possible examples, the second modulating the third carrier signal or the fourth carrier signal according to the second modulating signal to obtain a third modulated signal includes: and carrying out first phase shift on the third carrier signal or the fourth carrier signal according to the second modulation signal to obtain a third modulation signal.

In some possible examples, the third modulating the third carrier signal or the fourth carrier signal according to the second modulation signal to obtain a fourth modulated signal includes: and carrying out second phase shift on the third carrier signal or the fourth carrier signal according to the second modulation signal to obtain a fourth modulation signal.

A third aspect of the embodiments of the present application discloses a signal modulation apparatus, including: the first modulation unit is used for receiving a first original carrier signal and a first modulation signal, and performing first modulation on the first original carrier signal according to the first modulation signal to obtain a first carrier signal and/or a second carrier signal; the second modulation unit is used for carrying out second modulation on the first carrier signal or the second carrier signal according to the first modulation signal to obtain a first modulated signal; or performing third modulation on the first carrier signal or the second carrier signal according to the first modulation signal to obtain a second modulated signal.

An embodiment of the present application discloses, in a fourth aspect, a transmitter, where the transmitter includes the signal modulation circuit of any one of the first aspect.

A fifth aspect of embodiments herein discloses a transmitter comprising a processor, a memory, a communication interface, and one or more programs stored in the memory and configured to be executed by the processor, the programs including instructions for performing the steps of the method of any of the second aspects above.

A sixth aspect of the present embodiment discloses a chip, which includes: a processor for calling and running a computer program from a memory so that a device in which the chip is installed performs the method according to any one of the second aspects.

A seventh aspect of embodiments of the present application discloses a computer-readable storage medium, which is characterized by storing a computer program for electronic data exchange, wherein the computer program causes a computer to execute the method according to any one of the second aspects.

An eighth aspect of the present application discloses a computer program product, which causes a computer to execute the method according to any one of the above second aspects.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a transmitter provided in an embodiment of the present application;

fig. 2 is a schematic structural diagram of another transmitter provided in the embodiment of the present application;

fig. 3 is a schematic structural diagram of a signal modulation circuit according to an embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of a 4-PSK circuit according to an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of an 8-PSK circuit according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a 16-PSK circuit according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of another 4-PSK circuit provided in an embodiment of the present application;

fig. 8 is a schematic structural diagram of a 16QAM circuit according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of another 4-PSK circuit provided in an embodiment of the present application;

fig. 10 is a schematic structural diagram of another 8-PSK circuit provided in an embodiment of the present application;

fig. 11 is a schematic structural diagram of another 16-PSK circuit provided in an embodiment of the present application;

fig. 12 is a schematic flowchart of a signal modulation method according to an embodiment of the present application;

fig. 13 is a schematic structural diagram of a signal modulation apparatus according to an embodiment of the present application;

fig. 14 is a schematic structural diagram of another transmitter according to an embodiment of the present application.

Detailed Description

In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms "first," "second," and the like in the description and claims of the present application and in the foregoing drawings are used for distinguishing between different objects and not for describing a particular sequential order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described in this specification can be combined with other embodiments.

Referring to fig. 2, fig. 2 is a schematic structural diagram of another transmitter according to an embodiment of the present application, where the transmitter includes a direct modulation apparatus and an antenna, the direct modulation apparatus receives a carrier signal and a modulation signal or a radio frequency signal, directly modulates the carrier signal according to the modulation signal or the radio frequency signal to obtain a modulated signal, and transmits the modulated signal to the antenna; the antenna radiates the modulated signal.

The transmitter can be used for directly modulating and transmitting millimeter waves, specifically, the transmitter receives digital signals and millimeter wave signals, directly modulates the millimeter wave signals according to the digital signals, generates modulated millimeter wave signals, and radiates the modulated millimeter wave signals through an antenna to realize the transmission of wireless signals. The working principle of the direct millimeter wave modulation is as follows: by selecting different phase paths, the modulation of input signals is realized, modulated signals are output, and the direct modulation from digital signals to millimeter wave signals is realized. Specifically, the direct modulation device selects different phase shift paths according to the received n-bit digital signal, and then selects different phase shift paths according to the phase shift pathsThe phase shift is carried out on the input millimeter wave signal, and finally 2 can be realized ⁿ And outputting the phase-state modulated signal.

The transmitter eliminates a DAC and a traditional frequency conversion circuit, greatly simplifies the transmitter architecture, reduces the transmitter power consumption and is easy to realize in a chip manner; and the broadband modulation signal with the bandwidth larger than 10GHz is easy to realize, and the method is suitable for large-bandwidth millimeter wave application. In addition, the transmitter is suitable for a millimeter wave short-distance high-speed communication system and a millimeter wave indoor communication system, the communication system has higher and higher requirements on power consumption, bandwidth and integration of a transceiver along with the continuous improvement of signal frequency and data throughput, and the transmitter capable of realizing millimeter wave direct modulation has obvious advantages in the application because of simple structure, low power consumption and high efficiency.

The technical solutions provided in the present application are described in detail below with reference to specific embodiments.

Referring to fig. 3, fig. 3 is a schematic structural diagram of a signal modulation circuit according to an embodiment of the present application, where the signal modulation circuit includes: the first modulation unit is used for receiving a first original carrier signal and a first modulation signal, and performing first modulation on the first original carrier signal according to the first modulation signal to obtain a first carrier signal and/or a second carrier signal; the second modulation unit is used for carrying out second modulation on the first carrier signal or the second carrier signal according to the first modulation signal to obtain a first modulated signal; or performing third modulation on the first carrier signal or the second carrier signal according to the first modulation signal to obtain a second modulated signal.

Wherein the first original carrier signal comprises a millimeter wave signal and the first modulated signal comprises a digital signal.

Wherein the first modulation, the second modulation, and the third modulation comprise phase shift modulation. Specifically, the first modulation includes phase shifting according to 2 phases to obtain 2-level carrier signals with different phase states, that is, the phases of the first carrier signal and the second carrier signal are different; the phase shift of the second modulation is different from that of the third modulation, that is, the phases of the first modulated signal and the second modulated signal are different, so that modulation of 4 phase states can be realized altogether.

For example, when the first original carrier signal is a millimeter wave signal and the first modulation signal is a digital signal with a bit number of 2, the first modulation unit converts the millimeter wave signal into a first carrier signal and/or a second carrier signal, the second modulation unit selects the first carrier signal or the second carrier signal according to the first bit signal state of the digital signal, and then selects the second modulation scheme according to the second bit signal state of the digital signal to modulate the first carrier signal or the second carrier signal to obtain a second modulated signal, or selects the third modulation scheme according to the second bit signal state of the digital signal to modulate the first carrier signal or the second carrier signal to obtain a third modulated signal, thereby implementing direct modulation of the millimeter wave signal.

It can be seen that, in the signal modulation circuit provided in the embodiment of the present application, after receiving the first original carrier signal and the first modulation signal, the first modulation unit performs first modulation on the first original carrier signal according to the first modulation signal to obtain the first carrier signal and/or the second carrier signal; the second modulation unit carries out second modulation on the first carrier signal or the second carrier signal according to the first modulation signal to obtain a first modulated signal, or carries out third modulation on the first carrier signal or the second carrier signal according to the first modulation signal to obtain a second modulated signal, so that the first modulation signal is directly loaded into the first modulated signal or the second modulated signal; the modulation circuit is simple and efficient, can greatly simplify the transmitter architecture, reduces the power consumption of the transmitter, and is easy to realize in a chip mode.

In some possible examples, the first carrier signal is pi out of phase with the second carrier signal, and the first modulated signal is pi/2 out of phase with the second modulated signal.

Specifically, the first modulation unit performs phase shifting (first modulation) on the first original carrier signal according to a phase shifting phase of 0 to obtain a first carrier signal, and the first modulation unit performs phase shifting (first modulation) on the first original carrier signal according to a phase shifting phase of pi to obtain a second carrier signal; the second modulation unit performs phase shifting (second modulation) on the first carrier signal or the second carrier signal according to the phase shifting phase of 0 to obtain a first modulated signal, and the second modulation unit performs phase shifting (third modulation) on the first carrier signal or the second carrier signal according to the phase shifting phase of pi/2 to obtain a second modulated signal.

When the modulated signal is a digital signal, the signal modulation condition is shown in table 1.

TABLE 1 Signal modulation example

The following is a detailed description with reference to specific examples.

Example 1, please refer to fig. 4, and fig. 4 is a schematic structural diagram of a 4-PSK circuit according to an embodiment of the present disclosure.

As shown in fig. 4, the first modulation unit further includes a first modulation signal receiving module, where the first modulation signal receiving module receives a first modulation signal, and the first modulation signal is a digital signal (b 1b 0) with a bit number of 2.

The balun is also called a balance-unbalance transformer (balun) and can convert a single-ended input signal into two output signals, and the phase difference of the two output signals is pi.

As shown in fig. 4, the first modulation unit includes a first balun B, and the first balun B phase-shifts the first original carrier signal I1 according to a phase-shifted phase being 0 to obtain a first carrier signal through a first original carrier signal I1 input by an input end of the first balun B, and outputs the first carrier signal through a first output end a; the first balun B performs phase shifting on the first original carrier signal I1 according to the phase shifting phase pi to obtain a second carrier signal, and outputs the second carrier signal through a second output end B, so that the first original carrier signal I1 is divided into a first carrier signal and a second carrier signal which have phase differences pi.

The first bridge is a 90-degree bridge, the function of the first bridge is similar to that of a balun, and the difference is that the phase difference between two paths of output signals is pi/2.

As shown in fig. 4, the phase-shifted phase of the first leg e of the first bridge Q is 0, and when the carrier signal is output through the first leg e, the phase does not change; the phase shift phase of the second bridge arm f of the first bridge Q is pi/2, and the phase shift is pi/2 when the carrier signal is output through the second bridge arm f.

Wherein 50 Ω in fig. 4 represents a 50-ohm load, which is responsible for port matching.

As can be seen, in this example, the second modulation unit includes a first bridge having 2 bridge arms, and the first bridge arm of the first bridge selects the first carrier signal or the second carrier signal according to the first modulation signal to perform the first phase shift, so as to obtain a first modulated signal; selecting the first carrier signal or the second carrier signal to carry out second phase shifting according to the first modulation signal through a second bridge arm of the first bridge to obtain a second modulation signal; because the phases of the first carrier signal and the second carrier signal are different, the phase of a first modulated signal obtained by performing first phase shifting on the first carrier signal is different from the phase of a first modulated signal obtained by performing first phase shifting on the second carrier signal, that is, the first modulated signal has 2 phase states; similarly, the second modulated signal obtained by second phase shifting the first carrier signal is different from the second modulated signal obtained by second phase shifting the second carrier signal in phase, that is, the second modulated signal has 2 phase states, so that the first bridge can directly modulate to obtain a modulated signal with 4 phase states.

In some possible examples, the second modulation unit further includes a first switch, a first end of the first switch is connected to the first output end or the second output end of the first balun, and a second end of the first switch is connected to the first leg or the second leg of the first bridge.

Wherein, different state modulation of the input signal can be realized by selecting different phase shift paths by using a switch.

As shown in fig. 4, when the first terminal c of the first switch K1 is connected to the first output terminal a of the first balun B, the first carrier signal is selected; when the first end c of the first switch K1 is connected to the first output end B of the first balun B, the second carrier signal is selected. When the second end d of the first switch K1 is connected with the first bridge arm e of the first bridge Q, the phase of the first carrier signal or the second carrier signal is shifted according to the phase shift phase of 0, and then the first modulated signal is output from the output end g of the first bridge Q; when the second end d of the first switch K1 is connected with the second bridge arm f of the first bridge Q, the phase of the first carrier signal or the second carrier signal is shifted according to the phase shift phase pi/2, and then the second modulated signal is output from the output end g of the first bridge Q.

Specifically, the second modulation unit selects different phase shift paths according to the input digital signal information to implement 4-phase state modulation, and obtains a modulated signal with 4 phase states, where the modulated signal may be represented as:

s(t)＝A0sin[ωt+b0×(π/2)+b1×π] (1)

where A0 is amplitude, b1b0 is a digital signal, b1 and b0 can both be in two states, 0 and 1, and sin (ω t) is a first original carrier signal. The signal modulation for 4-PSK is shown in table 2.

TABLE 2 PSK example

It can be known from table 2 that 4 different phase shift paths are selected according to the received 2-bit digital signal, the phase of the first original carrier signal is shifted, and finally 4-PSK modulated signal output including 4 modulated signal states is realized, wherein the 4-PSK phase-shifts the carrier signal by pi/2 phase steps.

In this example, a first switch is disposed between the first balun and the first bridge, a first end of the first switch is optionally connected to the first output end or the second output end of the first balun, and a second end of the first switch is optionally connected to the first leg or the second leg of the first bridge; the second modulation unit can select a connection object by controlling the first end of the first switch to select the first carrier signal or the second carrier signal to perform second modulation; the second modulation unit can select a connection object by controlling the second end of the first switch to select a first bridge arm or a second bridge arm of the first bridge to shift the phase of the first carrier signal or the second carrier signal; thereby realizing that the first original carrier signal is directly modulated into a modulated signal with 4 phase states.

In some possible examples, the first modulation signal has a number of bits of n, where n is an integer equal to or greater than 2, and the second modulation unit further includes n-2 phase shift modules connected in series; the first ends of the n-2 phase-shifting modules connected in series are connected with the second end of the first switch, and the second ends of the n-2 phase-shifting modules connected in series are connected with the first bridge arm or the second bridge arm of the first bridge; each phase shifting module comprises 2 phase shifters and 1 switch, and the 2 phase shifters are connected in parallel and then connected in series with the 1 switch; the first end of the switch in each phase shift module is connected with one of the 2 phase shifters in the phase shift module, and the second end of the switch in each phase shift module is connected with one of the 2 phase shifters in the adjacent phase shift module.

The phase shifter is used for shifting the phase of the carrier signal according to the set phase shifting phase.

Specifically, for an input n-bit digital signal, on the basis of a first balun B and a first bridge Q, n-2 phase shift modules are arranged for selecting different signal phase shift paths according to the n-bit digital signal, and phase shifting is performed on a first carrier signal or a second carrier signal according to the different phase shift paths, so that modulated signals in different phase states are generated, and 2 digital signals can be output in total ⁿ Modulated signals of different phase states. Wherein, the phase shift phase of one of the 2 phase shifters of each phase shift module is 0, and the relationship between the digital signal bit number and the number of the phase shift modules and the phase shift phase of one of the phase shifters of each phase shift module is shown in table 3.

TABLE 3 phase Shift Module example

Number of bits of digital signal	Number of phase-shift modules	The phase shift of one phase shifter of each phase shift module
			3	1	π/4
4	2	π/4，π/8
			5	3	π/4，π/8，π/16
…	…	…
			n	n-2	π/4，π/8，π/16，…，π/2 ^n-1

It can be seen that in this example, n-2 phase shift modules connected in series may be disposed between the first switch and the first bridge, where n is the number of bits of the first modulation signal, each phase shift module includes 2 phase shifters and 1 switch, and the 2 phase shifters are connected in parallel and then connected in series with the 1 switch; for each phase shifting module, a switch can be passed therethroughOne of the 2 phase shifters is selected to shift the phase of the carrier signal, that is, each phase shift module can shift the phase of 2 phases of the carrier signal, and the n-2 phase shift modules can shift the phase of 2 phases of the carrier signal for n-2 times; because the first balun can perform 2-phase shifting on the carrier signal, and the first bridge can also perform 2-phase shifting on the carrier signal, the whole circuit can perform n-time 2-phase shifting on the carrier signal; thus, for a first modulated signal with the number of bits n, after n times of 2 phase shifts are performed on the first original carrier signal according to the first modulated signal, 2 can be obtained by modulation ⁿ A modulated signal is seeded.

As can be seen from the above description, for a digital signal bit number of 2, 4PSK is adopted to realize modulation according to the stepping pi/2; for the digital signal with the digit of 3, 8PSK is adopted to realize modulation according to the step pi/4; for the digital signal bit number of 4, 16PSK is adopted to realize modulation according to the step pi/8 stepping, and the higher-order M-PSK modulation is realized by analogy.

Fig. 5 is a schematic structural diagram of an 8-PSK circuit according to an embodiment of the present application. The 8-PSK circuit shown in fig. 5 is improved by adding 1 phase shift module on the basis of the 4-PSK circuit shown in fig. 4.

In some possible examples, n =3, the second modulation unit further comprises a first phase shifting module comprising a first phase shifter, a second phase shifter, and a second switch; a second terminal of the first switch is connected to an input terminal of the first phase shifter or an input terminal of the second phase shifter; and a first end of the second switch is connected with an output end of the first phase shifter or an output end of the second phase shifter, and a second end of the second switch is connected with a first bridge arm or a second bridge arm of the first bridge.

As shown in fig. 5, the input first modulation signal is a digital signal (b 2b1b 0) with a bit number of 3, a first phase shift module is arranged between the first switch K1 and the first bridge Q, and the first phase shift module includes a first phase shifter Y1, a second phase shifter Y2, and a second switch K2; a second end d of the first switch K1 is connected to an input h of the first phase shifter Y1 or an input i of the second phase shifter Y2; a first end l of the second switch K2 is connected to an output end j of the first phase shifter Y1 or an output end K of the second phase shifter Y2, and a second end m of the second switch K2 is connected to the first arm e or the second arm f of the first bridge Q.

As shown in FIG. 5, the phase shift phase of the first phase shifter Y1 is 0, and the phase shift phase of the second phase shifter Y2 is π/4.

Specifically, the second modulation unit selects different phase shift paths according to the input digital signal information to implement 8-phase state modulation, and obtains a modulated signal of 8-phase state, where the modulated signal may be represented as:

s(t)＝A0sin[ωt+b0×(π/4)+b1×(π/2)+b2×π] (2)

where A0 is amplitude, b2b1b0 is a digital signal, b2, b1, and b0 can be both 0 and 1, and sin (ω t) is the first original carrier signal. The signal modulation for 8-PSK is shown in table 4.

TABLE 4-PSK example

As can be seen from table 4, 8 different phase shift paths are selected according to the received 3-bit digital signal to shift the phase of the first original carrier signal, and finally 8-PSK modulated signal output including 8 modulated signal states is realized, where 8-PSK shifts the phase of the carrier signal in steps of pi/4 phase.

As can be seen, in this example, for a 3-bit first modulation signal, 1 phase shift module is provided in the signal modulation circuit, and the phase shift phase of the first phase shifter in the phase shift module is 0, and the phase shift phase of the second phase shifter is pi/4, so that the first original carrier signal can be modulated to obtain 8 modulated signals with a phase difference of pi/4.

Example 3, please refer to fig. 6, fig. 6 is a schematic structural diagram of a 16-PSK circuit according to an embodiment of the present application. The 16-PSK circuit shown in fig. 6 is improved by adding 2 phase shift modules on the basis of the 4-PSK circuit shown in fig. 4; that is, the 16-PSK circuit shown in fig. 6 is improved by adding 1 phase shift module on the basis of the 8-PSK circuit shown in fig. 5.

In some possible examples, n =4, the second modulation unit further comprising a second phase shifting module comprising a third phase shifter, a fourth phase shifter, and a third switch; a second end of the second switch is connected to an input end of the third phase shifter or an input end of the fourth phase shifter; and a first end of the third switch is connected with an output end of the third phase shifter or an output end of the fourth phase shifter, and a second end of the third switch is connected with the first bridge arm or the second bridge arm of the first bridge.

As shown in fig. 6, the input first modulation signal is a digital signal (b 3b2b1b 0) with a bit number of 4, a second phase shifting module is arranged between the first phase shifting module and the first bridge Q, and the second phase shifting module includes a third phase shifter Y3, a fourth phase shifter Y4 and a third switch K3; a second end m of the second switch K2 is connected to an input end n of the third phase shifter Y3 or an input end o of the fourth phase shifter Y4; a first end r of the third switch K3 is connected to an output end p of the third phase shifter Y3 or an output end Q of the fourth phase shifter Y4, and a second end s of the third switch K3 is connected to the first arm e or the second arm f of the first bridge Q.

In some possible examples, the third phase shifter has a phase shift of 0 and the fourth phase shifter has a phase shift of π/8.

As shown in FIG. 6, the phase shift phase of the third phase shifter Y3 is 0, and the phase shift phase of the fourth phase shifter Y4 is π/8.

Specifically, the second modulation unit selects different phase shift paths according to the input digital signal information to implement 16 phase state modulation, so as to obtain a modulated signal with 16 phase states, where the modulated signal may be represented as:

s(t)＝A0sin[ωt+b0×(π/8)+b1×(π/4)+b2×(π/2)+b3×π] (3)

where A0 is amplitude, b3b2b1b0 is digital signal, b3, b2, b1, and b0 can be both 0 and 1, and sin (ω t) is first original carrier signal. The signal modulation for 16-PSK is shown in table 5.

TABLE 5 PSK examples

As can be seen from table 5, 16 different phase shift paths are selected according to the received 4-bit digital signal, so as to shift the phase of the first original carrier signal, and finally, a 16-PSK modulated signal output including 16 modulated signal states is realized, where 16-PSK shifts the phase of the carrier signal in steps of pi/8 phase.

Example 4, please refer to fig. 7, and fig. 7 is a schematic structural diagram of another 4-PSK circuit provided in an embodiment of the present application. The 4-PSK circuit shown in fig. 7 is obtained by modifying the 4-PSK circuit shown in fig. 4 with a power amplifier instead of a switch.

In some possible examples, the second modulation unit further comprises a first power amplifier, a second power amplifier, a third power amplifier, a fourth power amplifier, a first power divider, and a second power divider; the input end of the first power amplifier is connected with the first output end of the first balun, and the output end of the first power amplifier is connected with the first input end of the first power divider; the input end of the second power amplifier is connected with the second output end of the first balun, and the output end of the second power amplifier is connected with the second input end of the first power divider; the output end of the first power divider is connected with the input end of the second power divider; the input end of the third power amplifier is connected with the first output end of the second power divider, and the output end of the third power amplifier is connected with the first bridge arm of the first bridge; the input end of the fourth power amplifier is connected with the second output end of the second power divider, and the output end of the fourth power amplifier is connected with the second bridge arm of the first bridge.

The different phase shift paths can be selected by controlling the power amplifier to be switched on or switched off so as to realize the modulation of different states of the input signal.

The power divider is used for combining two input signals into one signal to be output or dividing one signal into two signals to be output.

As shown in fig. 7, a first power amplifier G1 is disposed between the first output end a of the first balun B and the first input end v1 of the first power divider F1, a second power amplifier G2 is disposed between the second output end B of the first balun B and the second input end v2 of the first power divider F1, a third power amplifier G3 is disposed between the first output end w2 of the second power divider F2 and the first bridge arm e of the first bridge Q, and a fourth power amplifier G4 is disposed between the second output end w3 of the second power divider F2 and the second bridge arm F of the first bridge Q; an input end t1 of the first power amplifier G1 is connected with a first output end a of the first balun B, and an output end t2 of the first power amplifier G1 is connected with a first input end v1 of the first power divider F1; an input end u1 of the second power amplifier G2 is connected with a second output end B of the first balun B, and an output end u2 of the second power amplifier G2 is connected with a second input end v2 of the first power divider F1; the output end v3 of the first power divider F1 is connected with the input end w1 of the second power divider F2; an input end x1 of a third power amplifier G3 is connected with a first output end w2 of the second power divider F2, and an output end x2 of the third power amplifier G3 is connected with a first bridge arm e of the first bridge Q; the input end y1 of the fourth power amplifier G4 is connected to the second output end w3 of the second power divider F2, and the output end y2 of the fourth power amplifier G4 is connected to the second leg F of the first bridge Q.

The first modulated signal is a digital signal (b 1b 0) having a bit number of 2, and the signal modulation conditions based on 4-PSK in the power amplifier are shown in table 6.

TABLE 6 4-PSK examples based on Power Amplifier

As can be seen from table 6, 4 different phase shift paths are selected according to the received 2-bit digital signal to shift the phase of the first original carrier signal, and finally 4-PSK modulated signal output including 4 modulated signal states is realized, where the 4-PSK phase-shifts the carrier signal in steps of pi/2 phase.

The signal modulation circuit shown in fig. 7 uses the power amplifier to be turned on or off to select different phase shift paths to implement different state modulation on the input signal; the power divider and the balun have no selection function, the balun and the 90-degree bridge have a phase shifting function, and the power divider is used for connecting 4 power amplifiers.

The power amplifier is used for replacing a switching device, so that the signal is subjected to saturation amplification while being modulated, and the efficiency of the modulator is close to the saturation output efficiency of the last stage of power amplifier. When higher power output is considered, the latter-stage power amplifier can be replaced by a vacuum tube device, and millimeter wave signal output with extremely high efficiency is realized.

The key point of this example is that a power amplifier is used instead of a switch, the selection of different phase shift paths is realized by turning on/off the power amplifier, a gain modulator can be realized by using the power amplifier, and the power and efficiency of the modulator can be greatly improved by adopting a saturation mode.

As can be seen, in this example, power amplifiers are respectively disposed between the first input end of the first power amplifier and the first output end of the first balun, between the second input end of the first power amplifier and the second output end of the first balun, between the first output end of the second power divider and the first bridge arm of the first bridge, and between the second output end of the second power divider and the second bridge arm of the first bridge, and in the process of modulating the carrier signal, different phase shift paths are selected by controlling the on or off of the power amplifiers, so that the first original carrier signal is directly modulated into a modulated signal in a 4-phase state, and the signal is saturated and amplified by using the power amplifier, which can improve the power and efficiency of the modulator.

Fig. 8 is a schematic structural diagram of a 16QAM circuit according to an embodiment of the present application, please refer to fig. 8. The 16QAM circuit shown in fig. 8 is obtained by adding 1-channel 4-PSK circuit to the 4-PSK circuit shown in fig. 4.

Specifically, the first original carrier signal and the second original carrier signal have the same phase and the difference of 1/2 of the amplitude.

As shown in fig. 8, the third power divider F3 is used to divide one input signal into two output signals, and the phases of the two output signals are the same; an original carrier signal I is input to an input terminal z1 of the third power divider F3, the original carrier signal is directly output to a first output terminal z2 of the third power divider F3 to output a first original carrier signal I1, the original carrier signal is attenuated by 6dB at a second output terminal z3 of the third power divider F3 and then output to output a second original carrier signal I2, and the phases of the first original carrier signal I1 and the second original carrier signal I2 are the same.

In some possible examples, the circuit further comprises: a third modulation unit, configured to receive the second original carrier signal and a second modulation signal, and perform first modulation on the second original carrier signal according to the second modulation signal to obtain a third carrier signal and/or a fourth carrier signal; a fourth modulation unit, configured to perform second modulation on the third carrier signal or the fourth carrier signal according to the second modulation signal to obtain a third modulated signal; or performing third modulation on the third carrier signal or the fourth carrier signal according to the second modulation signal to obtain a fourth modulated signal; a fifth modulation unit configured to synthesize a fifth modulated signal according to the first modulated signal or the second modulated signal and the third modulated signal or the fourth modulated signal.

Specifically, the input millimeter wave signal is divided into two paths of signals, wherein one path of signal adopts millimeter wave direct modulation to generate one path of QPSK signal Q1, the other path of signal adopts millimeter wave direct modulation to generate the other path of QPSK signal Q2 after 6dB of attenuation, the amplitude of Q2 is half of Q1, and the 16QAM signal can be generated by synthesizing Q1 and Q2.

Specifically, the third modulation unit shifts the phase of the second original carrier signal according to the phase-shifting phase of 0 to obtain a third carrier signal, and the third modulation unit shifts the phase of the second original carrier signal according to the phase-shifting phase of pi to obtain a second carrier signal; the fourth modulation unit shifts the phase of the third carrier signal or the fourth carrier signal according to the phase shift phase of 0 to obtain a third modulated signal, and the fourth modulation unit shifts the phase of the third carrier signal or the fourth carrier signal according to the phase shift phase of pi/2 to obtain a fourth modulated signal.

As shown in fig. 8, the third modulation unit further includes a second modulation signal receiving module, where the second modulation signal receiving module receives a second modulation signal, and the second modulation signal is a digital signal (b 3b 2) with a bit number of 2 at this time.

In some possible examples, the third modulation unit further includes: a second balun configured to receive the second original carrier signal and convert the second original carrier signal into the third carrier signal and/or the fourth carrier signal.

As shown in fig. 8, the first modulation unit includes a second balun B ', a second original carrier signal I2 input through an input end of the second balun B', and the second balun B 'performs phase shifting on the second original carrier signal I2 according to a phase-shifting phase of 0 to obtain a third carrier signal, and outputs the third carrier signal through a first output end a'; the second balun B 'performs phase shifting on the second original carrier signal I2 according to the phase shifting phase of pi to obtain a fourth carrier signal, and outputs the fourth carrier signal through a second output end B', so that the second original carrier signal I2 is divided into a third carrier signal and a fourth carrier signal which have phase differences of pi.

In some possible examples, the fourth modulation unit comprises a second bridge comprising 2 legs; the first bridge arm of the second bridge is configured to perform a first phase shift on the third carrier signal or the fourth carrier signal according to the second modulation signal to obtain a third modulated signal; and the second bridge arm of the second bridge is used for carrying out second phase shift on the third carrier signal or the fourth carrier signal according to the second modulation signal to obtain the fourth modulated signal.

As shown in fig. 8, the phase-shifted phase of the first bridge arm e ' of the second bridge Q ' is 0, and when the carrier signal is output through the first bridge arm e ', the phase does not change; the phase shift phase of the second bridge arm f ' of the first bridge Q ' is pi/2, and the phase shift is pi/2 when the carrier signal is output through the second bridge arm f '.

In this example, the fourth modulation unit includes a second bridge having 2 bridge arms, and the first bridge arm of the second bridge selects the third carrier signal or the fourth carrier signal according to the second modulation signal to perform the first phase shift, so as to obtain a third modulated signal; selecting a third carrier signal or a fourth carrier signal for second phase shifting according to a second modulation signal through a second bridge arm of a second bridge to obtain a fourth modulation signal; because the third carrier signal and the fourth carrier signal have different phases, the phase of the third modulated signal obtained by first phase-shifting the third carrier signal is different from the phase of the third modulated signal obtained by first phase-shifting the fourth carrier signal, that is, the third modulated signal has a phase state of 2; similarly, the phase of the fourth modulated signal obtained by performing the second phase shift on the third carrier signal is different from the phase of the fourth modulated signal obtained by performing the second phase shift on the fourth carrier signal, that is, the fourth modulated signal has 2 phase states, so that the second carrier signal is modulated into the modulated signal in the 4 phase states, and the modulation of the original carrier signal into the 16QAM signal can be realized by combining the modulated signal in the 4 phase states obtained by modulating according to the first carrier signal.

As shown in fig. 8, when the first terminal c ' of the fourth switch K4 is connected to the first output terminal a ' of the second balun B ', the third carrier signal is selected; when the first end c ' of the fourth switch K4 is connected to the first output end B ' of the second balun B ', the fourth carrier signal is selected. When the second end d ' of the fourth switch K4 is connected with the first bridge arm e ' of the second bridge Q ', a third carrier signal or a fourth carrier signal is phase-shifted according to a phase-shift phase of 0, and then a third modulated signal is output from the output end g ' of the second bridge Q '; when the second end d ' of the fourth switch K4 is connected to the second bridge arm f ' of the second bridge Q ', the third carrier signal or the fourth carrier signal is phase-shifted by pi/2, and then the fourth modulated signal is output from the output end g ' of the second bridge Q '.

The 16QAM signal can be obtained by combining the first modulated signal or the second modulated signal output from the output terminal g of the first bridge Q ' and the third modulated signal or the fourth modulated signal output from the output terminal g ' of the second bridge Q '.

In this example, a fourth switch is disposed between the second balun and the second bridge, a first end of the fourth switch is optionally connected to the first output end or the second output end of the second balun, and a second end of the fourth switch is optionally connected to the first leg or the second leg of the second bridge; the third modulation unit can select a connection object by controlling the first end of the fourth switch to select the third carrier signal or the fourth carrier signal to perform second modulation; the fourth modulation unit can select a connection object by controlling the second end of the fourth switch to select the first bridge arm or the second bridge arm of the second bridge to shift the phase of the third carrier signal or the fourth carrier signal, so that the second original carrier signal is directly modulated into a modulated signal in a 4-phase state, and the modulation of the original carrier signal into a 16QAM signal can be realized by combining the modulated signal in the 4-phase state obtained by modulation according to the first carrier signal.

Example 6, please refer to fig. 9, fig. 9 is a schematic structural diagram of another 4-PSK circuit according to an embodiment of the present application.

As shown in fig. 9, the first modulation unit further includes a first modulation signal receiving module, where the first modulation signal receiving module receives a first modulation signal, and the first modulation signal is a digital signal (b 1b 0) with a bit number of 2 at this time.

As shown in fig. 9, the first modulation unit includes a fifth switch K5, a fifth phase shifter Y5 and a sixth phase shifter Y6, a second terminal h2 of the fifth switch K5 is connected to an input terminal a1 of the fifth phase shifter Y5 or an input terminal b1 of the sixth phase shifter, and the fifth phase shifter Y5 is connected in parallel to the sixth phase shifter Y6; a first end h1 of the fifth switch K5 is configured to receive the first original carrier signal; the fifth phase shifter Y5 is configured to shift the phase of the first original carrier signal by a phase shift phase of 0, and convert the first original carrier signal into a first carrier signal; and a sixth phase shifter Y6, configured to shift the phase of the first original carrier signal by a phase shift phase pi, and convert the first original carrier signal into a second carrier signal.

As can be seen, in this example, after the fifth switch receives the first original carrier signal, the fifth phase shifter is selected to shift the phase of the first original carrier signal according to the phase shift phase being 0, so as to obtain the first carrier signal; selecting a sixth phase shifter to shift the phase of the first original carrier signal according to the phase shift phase of pi, so as to obtain a second carrier signal; therefore, the phase of the first original carrier signal is shifted according to 2 phases, and a first carrier signal and a second carrier signal with the phase difference of pi are obtained.

In some possible examples, the second modulation unit includes a sixth switch, a seventh phase shifter, and an eighth phase shifter, a first terminal of the sixth switch is connected to an output terminal of the seventh phase shifter or an output terminal of the eighth phase shifter, and the seventh phase shifter is connected in parallel to the eighth phase shifter; the seventh phase shifter is configured to perform a first phase shift on the first carrier signal or the second carrier signal according to the first modulation signal to obtain the first modulated signal; the eighth phase shifter is configured to perform a second phase shift on the first carrier signal or the second carrier signal according to the first modulation signal, so as to obtain the second modulated signal.

As shown in fig. 9, the second modulation unit includes a sixth switch K6, a seventh phase shifter Y7, and an eighth phase shifter Y8, a first end g1 of the sixth switch K6 is connected to an output end e2 of the seventh phase shifter Y7 or an output end f2 of the eighth phase shifter Y8, and the seventh phase shifter Y7 is connected to the eighth phase shifter Y8 in parallel; a seventh phase shifter Y7, configured to shift the phase of the first carrier signal or the second carrier signal according to the first modulation signal, where the phase shift phase is 0, to obtain a first modulated signal; and the eighth phase shifter Y8 is used for carrying out second phase shifting on the first carrier signal or the second carrier signal according to the first modulation signal and the phase shifting phase of pi/2 to obtain a second modulated signal.

In this example, the second modulation unit includes a fourth phase shift module having a seventh phase shifter and an eighth phase shifter, and the seventh phase shifter selects the first carrier signal or the second carrier signal according to the first modulation signal to perform the first phase shift, so as to obtain the first modulated signal; selecting the first carrier signal or the second carrier signal to carry out second phase shifting according to the first modulation signal through the eighth phase shifter to obtain a second modulated signal; because the phases of the first carrier signal and the second carrier signal are different, the phase of a first modulated signal obtained by performing first phase shifting on the first carrier signal is different from the phase of a first modulated signal obtained by performing first phase shifting on the second carrier signal, that is, the first modulated signal has 2 phase states; similarly, the second modulated signal obtained by second phase shifting the first carrier signal is different from the second modulated signal obtained by second phase shifting the second carrier signal in phase, that is, the second modulated signal has 2 phase states, so that the modulated signal with 4 phase states can be directly modulated.

In some possible examples, the second modulation unit further comprises a first switch, a first terminal of the first switch being connected to the output terminal of the fifth phase shifter or the output terminal of the sixth phase shifter; a second terminal of the first switch is connected to an input terminal of the seventh phase shifter or an input terminal of the eighth phase shifter.

As shown in fig. 9, the second modulation unit further includes a first switch K1, and a first terminal c of the first switch K1 is connected to the output terminal a2 of the fifth phase shifter Y5 or the output terminal b2 of the sixth phase shifter Y6; the second terminal d of the first switch K1 is connected to the input e1 of the seventh phase shifter Y7 or the input f1 of the eighth phase shifter Y8.

Specifically, the second modulation unit selects different phase shift paths to implement 4-phase state modulation through the first switch K1 and the fifth switch K5 according to the input digital signal information, so as to obtain a modulated signal with 4 phase states, where the modulated signal may be represented as:

s(t)＝A0sin[ωt+b0×(π/2)+b1×π] (1)

where A0 is amplitude, b1b0 is a digital signal, b1 and b0 can be both 0 and 1, and sin (ω t) is the first original carrier signal. Yet another signal modulation scenario for 4-PSK is shown in table 7.

TABLE 7-PSK examples

As can be seen from table 7, 4 different phase shift paths are selected according to the received 2-bit digital signal to shift the phase of the first original carrier signal, and finally 4-PSK modulated signal output including 4 modulated signal states is realized, where the 4-PSK phase-shifts the carrier signal in steps of pi/2 phase.

In this example, a first switch is disposed in the second modulation unit, a first end of the first switch is connected to the output end of the fifth phase shifter or the output end of the sixth phase shifter, and a second end of the first switch is connected to the input end of the seventh phase shifter or the input end of the eighth phase shifter; the second modulation unit can select a connection object by controlling the first end of the first switch to select the first carrier signal or the second carrier signal to perform second modulation; the second modulation unit can select a connection object by controlling the second end of the first switch to select the seventh phase shifter or the eighth phase shifter to shift the phase of the first carrier signal or the second carrier signal; thereby realizing that the first original carrier signal is directly modulated into a modulated signal with 4 phase states.

Example 7, please refer to fig. 10, and fig. 10 is a schematic structural diagram of another 8-PSK circuit provided in an embodiment of the present application. The 8-PSK circuit shown in fig. 10 is improved by adding 1 phase shift module on the basis of the 4-PSK circuit shown in fig. 7.

In some possible examples, n =3, the second modulation unit further comprises a first phase shifting module comprising a first phase shifter, a second phase shifter, and a second switch; a second terminal of the first switch is connected to an input terminal of the first phase shifter or an input terminal of the second phase shifter; a first end of the second switch is connected to an output end of the first phase shifter or an output end of the second phase shifter, and a second end of the second switch is connected to an input end of the seventh phase shifter or an input end of the eighth phase shifter.

As shown in fig. 10, the input first modulation signal is a digital signal (b 2b1b 0) with a bit number of 3, a first phase shift module is disposed between the first switch K1 and the first bridge Q, and the first phase shift module includes a first phase shifter Y1, a second phase shifter Y2, and a second switch K2; a second end d of the first switch K1 is connected to an input h of the first phase shifter Y1 or an input i of the second phase shifter Y2; a first terminal l of the second switch K2 is connected to the output terminal j of the first phase shifter Y1 or the output terminal K of the second phase shifter Y2, and a second terminal m of the second switch K2 is connected to the input terminal e1 of the seventh phase shifter Y7 or the input terminal f1 of the eighth phase shifter.

As shown in FIG. 10, the phase shift phase of the first phase shifter Y1 is 0, and the phase shift phase of the second phase shifter Y2 is π/4.

Specifically, the second modulation unit selects different phase shift paths according to input digital signal information to implement 8-phase state modulation, and obtains a modulated signal in 8-phase state, where the modulated signal may be represented as:

s(t)＝A0sin[ωt+b0×(π/4)+b1×(π/2)+b2×π] (2)

where A0 is amplitude, b2b1b0 is a digital signal, b2, b1, and b0 can be both 0 and 1, and sin (ω t) is the first original carrier signal. Another signal modulation case for 8-PSK is shown in table 8.

TABLE 8-PSK example

As can be seen from table 8, 8 different phase shift paths are selected according to the received 3-bit digital signal, so as to shift the phase of the first original carrier signal, and finally, an 8-PSK modulated signal output including 8 modulated signal states is achieved, where the 8-PSK phase-shifts the carrier signal by pi/4 phase steps.

Example 8, please refer to fig. 11, where fig. 11 is a schematic structural diagram of another 16-PSK circuit according to an embodiment of the present application. Wherein, the 16-PSK circuit shown in fig. 11 is improved by adding 2 phase shift modules on the basis of the 4-PSK circuit shown in fig. 9; that is, the 16-PSK circuit shown in fig. 11 is improved by adding 1 phase shift module to the 8-PSK circuit shown in fig. 10.

In some possible examples, n =4, the second modulation unit further comprising a second phase shifting module comprising a third phase shifter, a fourth phase shifter, and a third switch; a second terminal of the second switch is connected to an input terminal of the third phase shifter or an input terminal of the fourth phase shifter; a first end of the third switch is connected to an output end of the third phase shifter or an output end of the fourth phase shifter, and a second end of the third switch is connected to an input end of the seventh phase shifter or an input end of the eighth phase shifter.

As shown in fig. 11, the input first modulation signal is a digital signal (b 3b2b1b 0) with a bit number of 4, a second phase shift module is disposed between the first phase shift module and the first bridge Q, and the second phase shift module includes a third phase shifter Y3, a fourth phase shifter Y4, and a third switch K3; a second end m of the second switch K2 is connected to an input end n of the third phase shifter Y3 or an input end o of the fourth phase shifter Y4; a first terminal r of the third switch K3 is connected to the output terminal p of the third phase shifter Y3 or the output terminal q of the fourth phase shifter Y4, and a second terminal s of the third switch K3 is connected to the input terminal e1 of the seventh phase shifter Y7 or the input terminal f1 of the eighth phase shifter.

As shown in FIG. 11, the phase shift phase of the third phase shifter Y3 is 0, and the phase shift phase of the fourth phase shifter Y4 is π/8.

s(t)＝A0sin[ωt+b0×(π/8)+b1×(π/4)+b2×(π/2)+b3×π] (3)

where A0 is amplitude, b3b2b1b0 is digital signal, b3, b2, b1, and b0 can be both 0 and 1, and sin (ω t) is first original carrier signal. Another 16-PSK signal modulation is shown in table 9.

TABLE 9 PSK example

As can be seen from table 9, 16 different phase shift paths are selected according to the received 4-bit digital signal, so as to shift the phase of the first original carrier signal, and finally, a 16-PSK modulated signal output including 16 modulated signal states is realized, where 16-PSK shifts the phase of the carrier signal in steps of pi/8 phase.

Known by the above examples, the direct digital modulation transmitter architecture of the application directly uses the data stream to modulate the radio frequency signal, and does not need a digital-to-analog conversion module and a frequency conversion module, thereby greatly simplifying the transmitter link while breaking through the bottleneck of a high-speed broadband DAC, reducing the design difficulty of the transmitter, saving the design cost, improving the energy efficiency of the transmitter, and being beneficial to realizing the design of a chip-level system. The method is suitable for the transceiver systems with low power consumption, ultra-wide bandwidth and low cost requirements, such as millimeter wave ultra-wideband communication systems and short-range communication systems.

Referring to fig. 12, fig. 12 is a signal modulation method according to an embodiment of the present application, the method includes, but is not limited to, the following steps:

step 1201, receiving a first original carrier signal and a first modulation signal, and performing first modulation on the first original carrier signal according to the first modulation signal to obtain a first carrier signal and/or a second carrier signal.

Step 1202, performing second modulation on the first carrier signal or the second carrier signal according to the first modulation signal to obtain a first modulated signal; or performing third modulation on the first carrier signal or the second carrier signal according to the first modulation signal to obtain a second modulated signal.

In some possible examples, the second modulating the first carrier signal or the second carrier signal according to the first modulation signal to obtain a first modulated signal includes: and carrying out first phase shifting on the first carrier signal or the second carrier signal according to the first modulation signal to obtain the first modulation signal.

In some possible examples, the third modulating the first carrier signal or the second carrier signal according to the first modulation signal to obtain a second modulated signal includes: and carrying out second phase shifting on the first carrier signal or the second carrier signal according to the first modulation signal to obtain a second modulation signal.

In some possible examples, the method further comprises: receiving the second original carrier signal and a second modulation signal, and performing first modulation on the second original carrier signal according to the second modulation signal to obtain a third carrier signal and/or a fourth carrier signal; performing second modulation on the third carrier signal or the fourth carrier signal according to the second modulation signal to obtain a third modulated signal; or performing third modulation on the third carrier signal or the fourth carrier signal according to the second modulation signal to obtain a fourth modulated signal; combining a fifth modulated signal according to the first or second modulated signal and the third or fourth modulated signal.

In some possible examples, the second modulating the third carrier signal or the fourth carrier signal according to the second modulating signal to obtain a third modulated signal includes: and performing first phase shifting on the third carrier signal or the fourth carrier signal according to the second modulation signal to obtain the third modulation signal.

In some possible examples, the third modulating the third carrier signal or the fourth carrier signal according to the second modulation signal to obtain a fourth modulated signal includes: and performing second phase shifting on the third carrier signal or the fourth carrier signal according to the second modulation signal to obtain the fourth modulation signal.

It should be noted that, the implementation of the embodiments of the method of the present application may also correspondingly refer to the corresponding description in the foregoing circuit embodiments.

In the signal modulation method depicted in fig. 12, after receiving the first original carrier signal and the first modulation signal, the first original carrier signal is first modulated according to the first modulation signal to obtain a first carrier signal and/or a second carrier signal; performing second modulation on the first carrier signal or the second carrier signal according to the first modulation signal to obtain a first modulated signal, or performing third modulation on the first carrier signal or the second carrier signal according to the first modulation signal to obtain a second modulated signal, so that the first modulation signal is directly loaded into the first modulated signal or the second modulated signal; the signal modulation method is simple and efficient, can greatly simplify the transmitter architecture, reduces the power consumption of the transmitter, and is easy to realize in a chip mode.

Referring to fig. 13, fig. 13 is a schematic structural diagram of a signal modulation apparatus provided in an embodiment of the present application, where the signal modulation apparatus 1300 may include a first modulation unit 1301 and a second modulation unit 1302, and the signal modulation apparatus 1300 is applied to a transmitter, where details of each unit are described below.

A first modulation unit 1301, configured to receive a first original carrier signal and a first modulation signal, and perform first modulation on the first original carrier signal according to the first modulation signal to obtain a first carrier signal and/or a second carrier signal;

a second modulation unit 1302, configured to perform second modulation on the first carrier signal or the second carrier signal according to the first modulation signal to obtain a first modulated signal; or performing third modulation on the first carrier signal or the second carrier signal according to the first modulation signal to obtain a second modulated signal.

Of course, the signal modulation apparatus 1300 provided in the embodiment of the present application includes, but is not limited to, the above unit modules, for example: the signal modulation apparatus 1300 may further include a storage unit 1303. The memory unit 1303 may be used to store program codes and data of the signal modulation apparatus 1300.

It should be noted that the implementation of each unit may also correspond to the corresponding description in the method embodiment shown in fig. 12.

In the signal modulation apparatus 1300 depicted in fig. 13, after receiving the first original carrier signal and the first modulation signal, the first modulation unit 1301 performs first modulation on the first original carrier signal according to the first modulation signal to obtain a first carrier signal and/or a second carrier signal; the second modulation unit 1302 performs second modulation on the first carrier signal or the second carrier signal according to the first modulation signal to obtain a first modulated signal, or performs third modulation on the first carrier signal or the second carrier signal according to the first modulation signal to obtain a second modulated signal, so that the first modulation signal is directly loaded into the first modulated signal or the second modulated signal; the modulation circuit is simple and efficient, can greatly simplify the transmitter architecture, reduces the power consumption of the transmitter, and is easy to realize in a chip mode.

Referring to fig. 14, fig. 14 is a schematic structural diagram of a transmitter 1410 according to an embodiment of the present disclosure, and as shown in fig. 14, the transmitter 1410 includes a communication interface 1411, a processor 1412, a memory 1413, and at least one communication bus 1414 for connecting the communication interface 1411, the processor 1412, and the memory 1413.

The memory 1413 includes, but is not limited to, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), or a portable read-only memory (CD-ROM), and the memory 1413 is used for related instructions and data.

The communication interface 1411 is used to receive and transmit data.

The processor 1412 may be one or more Central Processing Units (CPUs), and in the case that the processor 1412 is one CPU, the CPU may be a single-core CPU or a multi-core CPU.

A processor 1412 in the transmitter 1410 is configured to read one or more program codes stored in the memory 1413 and perform the following operations: receiving a first original carrier signal and a first modulation signal, and performing first modulation on the first original carrier signal according to the first modulation signal to obtain a first carrier signal and/or a second carrier signal; performing second modulation on the first carrier signal or the second carrier signal according to the first modulation signal to obtain a first modulated signal; or performing third modulation on the first carrier signal or the second carrier signal according to the first modulation signal to obtain a second modulated signal.

It should be noted that, the implementation of each operation may also correspond to the corresponding description in the method embodiment described with reference to fig. 12.

In the transmitter 1410 depicted in fig. 14, after receiving the first original carrier signal and the first modulation signal, the first original carrier signal is first modulated according to the first modulation signal to obtain a first carrier signal and/or a second carrier signal; carrying out second modulation on the first carrier signal or the second carrier signal according to the first modulation signal to obtain a first modulated signal, or carrying out third modulation on the first carrier signal or the second carrier signal according to the first modulation signal to obtain a second modulated signal, so that the first modulation signal is directly loaded into the first modulated signal or the second modulated signal; the signal modulation method is simple and efficient, can greatly simplify the transmitter architecture, reduces the power consumption of the transmitter, and is easy to realize in a chip mode.

The embodiment of the present application further provides a transmitter, where the transmitter includes the signal modulation circuit in the above circuit embodiment.

The embodiment of the present application further provides a chip, where the chip includes at least one processor, a memory and an interface circuit, where the memory, the transceiver and the at least one processor are interconnected by a line, and the at least one memory stores a computer program; the method flows shown in the above method embodiments are implemented when the computer program is executed by the processor.

Embodiments of the present application further provide a computer-readable storage medium, in which a computer program is stored, and when the computer program runs on a computer, the method flows shown in the above method embodiments are implemented.

The embodiments of the present application further provide a computer program product, where when the computer program product runs on a computer, the method flows shown in the above method embodiments are implemented.

It should be understood that the Processor mentioned in the embodiments of the present Application may be a Central Processing Unit (CPU), and may also be other general purpose processors, digital Signal Processors (DSP), application Specific Integrated Circuits (ASIC), field Programmable Gate Arrays (FPGA) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components, and the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It will also be appreciated that the memory referred to in the embodiments herein may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. The volatile Memory may be a Random Access Memory (RAM) which serves as an external cache. By way of example, but not limitation, many forms of RAM are available, such as Static random access memory (Static RAM, SRAM), dynamic Random Access Memory (DRAM), synchronous Dynamic random access memory (Synchronous DRAM, SDRAM), double Data Rate Synchronous Dynamic random access memory (DDR SDRAM), enhanced Synchronous SDRAM (ESDRAM), synchronous link SDRAM (SLDRAM), and Direct Rambus RAM (DR RAM).

It should be noted that when the processor is a general-purpose processor, a DSP, an ASIC, an FPGA or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, the memory (memory module) is integrated in the processor.

It should be noted that the memory described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not imply any order of execution, and the order of execution of the processes should be determined by their functions and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It can be clearly understood by those skilled in the art that, for convenience and simplicity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The steps in the method of the embodiment of the application can be sequentially adjusted, combined and deleted according to actual needs.

The modules in the device can be merged, divided and deleted according to actual needs.

The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A signal modulation circuit, comprising:

a first modulation unit, configured to receive a first original carrier signal and a first modulation signal, where the first modulation signal includes a digital signal with at least two bits, and perform first modulation on the first original carrier signal according to the first modulation signal to obtain a first carrier signal and a second carrier signal;

a second modulation unit, configured to select the first carrier signal or the second carrier signal according to a state of a first bit of the digital signal, and determine to perform second modulation or third modulation on the selected carrier signal according to a state of a second bit of the digital signal, where the second modulation obtains a first modulated signal; the third modulation results in a second modulated signal.

2. The circuit of claim 1, wherein the first carrier signal is pi out of phase with the second carrier signal and the first modulated signal is pi/2 out of phase with the second modulated signal.

3. The circuit of claim 2, wherein the first modulation unit comprises:

and the first modulation signal receiving module is used for receiving the first modulation signal.

4. The circuit of claim 3, wherein the first modulation unit further comprises:

a first balun configured to receive the first original carrier signal and to convert the first original carrier signal into the first carrier signal and/or the second carrier signal.

5. The circuit of claim 3, wherein the first modulation unit comprises a fifth switch, a fifth phase shifter, and a sixth phase shifter, wherein a second terminal of the fifth switch is connected to an input terminal of the fifth phase shifter or an input terminal of the sixth phase shifter, and wherein the fifth phase shifter is connected in parallel to the sixth phase shifter;

a first end of the fifth switch is configured to receive the first original carrier signal;

the fifth phase shifter is configured to convert the first original carrier signal into the first carrier signal;

the sixth phase shifter is configured to convert the first original carrier signal into the second carrier signal.

6. The circuit according to claim 4 or 5, wherein the second modulation unit comprises a first bridge comprising 2 legs;

the first bridge arm of the first bridge is used for performing first phase shift on the first carrier signal or the second carrier signal according to the first modulation signal to obtain a first modulated signal;

and the second bridge arm of the first bridge is used for carrying out second phase shift on the first carrier signal or the second carrier signal according to the first modulation signal to obtain a second modulated signal.

7. The circuit of claim 6, wherein the second modulation unit further comprises a first switch, a first terminal of the first switch being connected to the first output terminal or the second output terminal of the first balun;

or the first end of the first switch is connected with the output end of the fifth phase shifter or the output end of the sixth phase shifter;

and the second end of the first switch is connected with the first bridge arm or the second bridge arm of the first bridge.

8. The circuit according to claim 4 or 5, wherein the second modulation unit comprises a sixth switch, a seventh phase shifter and an eighth phase shifter, wherein a first terminal of the sixth switch is connected to an output terminal of the seventh phase shifter or an output terminal of the eighth phase shifter, and wherein the seventh phase shifter is connected in parallel to the eighth phase shifter;

the seventh phase shifter is configured to perform a first phase shift on the first carrier signal or the second carrier signal according to the first modulation signal to obtain the first modulated signal;

the eighth phase shifter is configured to perform a second phase shift on the first carrier signal or the second carrier signal according to the first modulation signal, so as to obtain the second modulated signal.

9. The circuit of claim 8, wherein the second modulation unit further comprises a first switch, and a first terminal of the first switch is connected to the first output terminal or the second output terminal of the first balun;

a second terminal of the first switch is connected to an input terminal of the seventh phase shifter or an input terminal of the eighth phase shifter.

10. The circuit according to claim 7 or 9, wherein the first modulation signal has a number of bits of n, where n is an integer equal to or greater than 2, and the second modulation unit further comprises n-2 phase shift modules connected in series;

the first ends of the n-2 phase-shifting modules connected in series are connected with the second end of the first switch, the second ends of the n-2 phase-shifting modules connected in series are connected with the first bridge arm or the second bridge arm of the first bridge, or the second ends of the n-2 phase-shifting modules connected in series are connected with the input end of the seventh phase shifter or the input end of the eighth phase shifter;

each phase shifting module comprises 2 phase shifters and 1 switch, and the 2 phase shifters are connected in parallel and then connected in series with the 1 switch;

the first end of the switch in each phase shift module is connected with one of the 2 phase shifters in the phase shift module, and the second end of the switch in each phase shift module is connected with one of the 2 phase shifters in the adjacent phase shift module.

11. The circuit of claim 10, wherein n =3, the second modulation unit further comprising a first phase shifting module comprising a first phase shifter, a second phase shifter, and a second switch;

a second terminal of the first switch is connected to an input terminal of the first phase shifter or an input terminal of the second phase shifter;

a first end of the second switch is connected to an output end of the first phase shifter or an output end of the second phase shifter, a second end of the second switch is connected to the first bridge arm or the second bridge arm of the first bridge, or a second end of the second switch is connected to an input end of the seventh phase shifter or an input end of the eighth phase shifter.

12. The circuit of claim 11, wherein the phase-shifted phase of the first phase shifter is 0 and the phase-shifted phase of the second phase shifter is pi/4.

13. The circuit of claim 12, wherein n =4, wherein the second modulation unit further comprises a second phase shifting module comprising a third phase shifter, a fourth phase shifter, and a third switch;

a second end of the second switch is connected to an input end of the third phase shifter or an input end of the fourth phase shifter;

a first end of the third switch is connected to an output end of the third phase shifter or an output end of the fourth phase shifter, a second end of the third switch is connected to the first bridge arm or the second bridge arm of the first bridge, or a second end of the third switch is connected to an input end of the seventh phase shifter or an input end of the eighth phase shifter.

14. The circuit of claim 13, wherein the phase-shifted phase of the third phase shifter is 0 and the phase-shifted phase of the fourth phase shifter is pi/8.

15. The circuit of claim 6, wherein the second modulation unit further comprises a first power amplifier, a second power amplifier, a third power amplifier, a fourth power amplifier, a first power divider, and a second power divider;

the input end of the first power amplifier is connected with the first output end of the first balun, and the output end of the first power amplifier is connected with the first input end of the first power divider;

the input end of the second power amplifier is connected with the second output end of the first balun, and the output end of the second power amplifier is connected with the second input end of the first power divider;

the output end of the first power divider is connected with the input end of the second power divider;

the input end of the third power amplifier is connected with the first output end of the second power divider, and the output end of the third power amplifier is connected with the first bridge arm of the first bridge;

the input end of the fourth power amplifier is connected with the second output end of the second power divider, and the output end of the fourth power amplifier is connected with the second bridge arm of the first bridge.

16. The circuit of any of claims 1-5 or 7 or 9, further comprising:

a third power divider, configured to receive an original carrier signal and divide the original carrier signal into the first original carrier signal and a second original carrier signal, where the first original carrier signal and the second original carrier signal have the same phase and different amplitudes.

17. The circuit of claim 16, further comprising:

a third modulation unit, configured to receive the second original carrier signal and a second modulation signal, and perform first modulation on the second original carrier signal according to the second modulation signal to obtain a third carrier signal and/or a fourth carrier signal;

a fourth modulation unit, configured to perform second modulation on the third carrier signal or the fourth carrier signal according to the second modulation signal to obtain a third modulated signal; or performing third modulation on the third carrier signal or the fourth carrier signal according to the second modulation signal to obtain a fourth modulated signal;

a fifth modulation unit configured to synthesize a fifth modulated signal from the first modulated signal or the second modulated signal and the third modulated signal or the fourth modulated signal.

18. The circuit of claim 17, wherein the third carrier signal is out of phase with the fourth carrier signal by pi, wherein the third modulated signal is out of phase with the fourth modulated signal by pi/2, and wherein the amplitude of the first or second modulated signal differs by 1/2 from the amplitude of the third or fourth modulated signal.

19. The circuit of claim 18, wherein the third modulation unit comprises:

and the second modulation signal receiving module is used for receiving the second modulation signal.

20. The circuit of claim 19, wherein the third modulation unit further comprises:

a second balun configured to receive the second original carrier signal and convert the second original carrier signal into the third carrier signal and/or the fourth carrier signal.

21. The circuit of claim 20, wherein the fourth modulation unit comprises a second bridge comprising 2 legs;

the first bridge arm of the second bridge is configured to perform a first phase shift on the third carrier signal or the fourth carrier signal according to the second modulation signal to obtain a third modulated signal;

and the second bridge arm of the second bridge is used for carrying out second phase shift on the third carrier signal or the fourth carrier signal according to the second modulation signal to obtain the fourth modulated signal.

22. The circuit of claim 21, wherein the fourth modulation unit further comprises a fourth switch, a first terminal of the fourth switch is connected to the first output terminal or the second output terminal of the second balun, and a second terminal of the fourth switch is connected to the first leg or the second leg of the second bridge.

23. A method of signal modulation, comprising:

receiving a first original carrier signal and a first modulation signal, wherein the first modulation signal comprises at least two bit digital signals, and performing first modulation on the first original carrier signal according to the first modulation signal to obtain a first carrier signal and a second carrier signal;

selecting the first carrier signal or the second carrier signal according to the state of a first bit of the digital signal, and determining to perform second modulation or third modulation on the selected carrier signal according to the state of a second bit of the digital signal, wherein the second modulation is performed to obtain a first modulated signal; the third modulation results in a second modulated signal.

24. The method of claim 23, wherein the first carrier signal is pi out of phase with the second carrier signal, and wherein the first modulated signal is pi/2 out of phase with the second modulated signal.

25. The method according to claim 23 or 24, further comprising:

receiving an original carrier signal, and dividing the original carrier signal into a first original carrier signal and a second original carrier signal, wherein the first original carrier signal and the second original carrier signal have the same phase and different amplitudes.

26. The method of claim 25, further comprising:

receiving the second original carrier signal and a second modulation signal, and performing first modulation on the second original carrier signal according to the second modulation signal to obtain a third carrier signal and/or a fourth carrier signal;

performing second modulation on the third carrier signal or the fourth carrier signal according to the second modulation signal to obtain a third modulated signal; or performing third modulation on the third carrier signal or the fourth carrier signal according to the second modulation signal to obtain a fourth modulated signal;

synthesizing a fifth modulated signal from the first or second modulated signal and the third or fourth modulated signal.

27. The method of claim 26, wherein the third carrier signal is pi out of phase with the fourth carrier signal, wherein the third modulated signal is pi/2 out of phase with the fourth modulated signal, and wherein the amplitude of the first or second modulated signal differs by 1/2 from the amplitude of the third or fourth modulated signal.

28. A transmitter, characterized in that the transmitter comprises a signal modulation circuit according to any one of claims 1-22.

29. A transmitter comprising a processor, a memory, a communication interface, and one or more programs stored in the memory and configured to be executed by the processor, the programs comprising instructions for performing the steps in the method of any of claims 23-27.

30. A chip, comprising: a processor for calling and running a computer program from a memory so that a device on which the chip is installed performs the method of any one of claims 23-27.