Millimeter wave transmitter modulation apparatus and method

Abstract

The application discloses a millimeter wave transmitter modulation device and method. In the millimeter wave transmitter modulation device, a first input end is used for receiving a first wired waveform; a second input end is used for receiving a second wired waveform; a third input end is used for receiving a third wired waveform; an oscillator is electrically connected with the first input end, and is used for generating a frequency modulation waveform by frequency modulation of a millimeter wave carrier according to the first wired waveform; a first amplitude modulator is electrically connected with the oscillator and the second input end respectively, and is used for generating a first composite modulation waveform by amplitude modulation of the frequency modulation waveform based on the second wired waveform; a second amplitude modulator is electrically connected with the oscillator and the third input end respectively, and is used for generating a second composite modulation waveform by amplitude modulation of the frequency modulation waveform based on the third wired waveform; and an antenna module is used for radiating the first composite modulation waveform and the second composite modulation waveform to a signal sink.

Description

Technical Field

[0001] This application relates to the field of wireless communication technology, specifically to a millimeter-wave transmitter modulation device and method. Background Technology

[0002] With the increasing integration and thinner design of electronic products such as mobile terminals, wearable devices, and tablet computers, the connection cables and plug-and-play interfaces of traditional wired high-speed interfaces (such as DP, MIPI D-PHY, USB 3.0, etc.) are gradually becoming unavoidable obstacles. Therefore, the industry urgently needs a wireless architecture that simultaneously meets the requirements of high speed, low power consumption, low latency, and compact structure to replace these wired high-speed interfaces.

[0003] Current short-range wireless alternatives are typically based on low-GHz frequency radio frequency communication or infrared links, such as 2.4GHz and 5GHz Wi-Fi and infrared communication protocols. However, these solutions cannot provide transmission rates comparable to wired interfaces due to their low carrier frequencies and limited bandwidth. In addition, they usually require complex protocol stacks and synchronization mechanisms, resulting in significant system latency, making them unsuitable for real-time transmission interface replacement scenarios, such as display signal transmission.

[0004] In recent years, millimeter-wave communication has become a popular alternative for short-range wireless communication due to its extremely high data rate. However, most existing millimeter-wave point-to-point communication links use a single-channel modulation structure, which makes it difficult to achieve parallel transmission of multiple data streams under conditions of limited system complexity. Summary of the Invention

[0005] This application provides a millimeter-wave transmitter modulation device and method that can achieve parallel transmission of multiple data streams under single-chip conditions.

[0006] In a first aspect, embodiments of this application provide a millimeter-wave transmitter modulation apparatus, comprising:

[0007] The first input terminal is used to receive the first wired waveform;

[0008] The second input terminal is used to receive the second wired waveform;

[0009] The third input terminal is used to receive a third wired waveform, wherein the data rates of the second wired waveform and the third wired waveform are the same and time-synchronized, and the data rate of the first wired waveform is lower than that of the second wired waveform and the third wired waveform;

[0010] An oscillator, electrically connected to the first input terminal, is used to frequency modulate the millimeter-wave carrier according to the first wired waveform to generate a frequency-modulated waveform.

[0011] A first amplitude modulator is electrically connected to the oscillator and the second input terminal, respectively, and is used to perform amplitude modulation on the frequency modulation waveform based on the second wired waveform to generate a first composite modulation waveform.

[0012] The second amplitude modulator is electrically connected to the oscillator and the third input terminal, respectively, and is used to perform amplitude modulation on the frequency modulation waveform based on the third wired waveform to generate a second composite modulation waveform.

[0013] An antenna module is used to radiate the first composite modulation waveform and the second composite modulation waveform to the receiver.

[0014] In the millimeter-wave transmitter modulation device provided in this application embodiment, when the first wired waveform is a digital waveform, the oscillator is a digitally controlled oscillator, and the frequency modulation method is FSK modulation.

[0015] In the millimeter-wave transmitter modulation device provided in this application embodiment, when the first wired waveform is an analog waveform, the oscillator is a voltage-controlled oscillator, and the frequency modulation method is FM modulation.

[0016] In the millimeter-wave transmitter modulation device provided in this application embodiment, when the second wired waveform and the third wired waveform are digital waveforms, the amplitude modulation method is ASK modulation.

[0017] In the millimeter-wave transmitter modulation device provided in this application embodiment, when the second wired waveform and the third wired waveform are bipolar waveforms, the millimeter-wave transmitter modulation device further includes a first waveform encoding module and a second waveform encoding module. The first waveform encoding module is electrically connected between the second input terminal and the first amplitude modulator, and the second waveform encoding module is electrically connected between the third input terminal and the second amplitude modulator.

[0018] In the millimeter-wave transmitter modulation device provided in this application embodiment, the first waveform encoding module and the second waveform encoding module include a DC bias and a quantizer; the DC bias is used to apply a DC bias to the second wired waveform or the third wired waveform and convert it into a unipolar waveform; the quantizer is used to quantize the unipolar waveform and output a keying code control word.

[0019] In the millimeter-wave transmitter modulation device provided in this application embodiment, the first waveform encoding module and the second waveform encoding module further include an encoder, which is used to encode the keying code control word to suppress glitches generated during code word switching.

[0020] In the millimeter-wave transmitter modulation device provided in this application embodiment, the ASK modulation is biased ASK modulation.

[0021] In the millimeter-wave transmitter modulation device provided in the embodiments of this application, the antenna module has two separate and remote antenna elements, and the polarization directions of the two antenna elements are orthogonal to each other or a single antenna with an orthogonal dual-polarization feeding structure, so as to achieve channel isolation on the transmitting side.

[0022] Secondly, embodiments of this application provide a millimeter-wave transmitter modulation method applied to the aforementioned millimeter-wave transmitter modulation apparatus, the millimeter-wave transmitter modulation method comprising:

[0023] Receive a first wired waveform, a second wired waveform, and a third wired waveform. The second wired waveform and the third wired waveform have the same data rate and are time-synchronized. The data rate of the first wired waveform is lower than that of the second wired waveform and the third wired waveform.

[0024] The millimeter-wave carrier is frequency modulated according to the first wired waveform to generate a frequency-modulated waveform.

[0025] The frequency modulation waveform is amplitude modulated based on the second wired waveform to generate a first composite modulation waveform.

[0026] The frequency modulation waveform is amplitude modulated based on the third wired waveform to generate a second composite modulation waveform.

[0027] The first composite modulation waveform and the second composite modulation waveform are radiated to the sink.

[0028] In summary, the millimeter-wave transmitter modulation device provided in this application includes a first input terminal, a second input terminal, a third input terminal, an oscillator, a first amplitude modulator, a second amplitude modulator, and an antenna module. The first input terminal receives a first wired waveform; the second input terminal receives a second wired waveform; and the third input terminal receives a third wired waveform. The second and third wired waveforms have the same data rate and are time-synchronized, and the data rate of the first wired waveform is lower than that of the second and third wired waveforms. The oscillator is electrically connected to the first input terminal and is used to frequency modulate the millimeter-wave carrier wave according to the first wired waveform to generate a frequency-modulated waveform. The first amplitude modulator is electrically connected to both the oscillator and the second input terminal and is used to amplitude modulate the frequency-modulated waveform based on the second wired waveform to generate a first composite modulation waveform. The second amplitude modulator is electrically connected to both the oscillator and the third input terminal and is used to amplitude modulate the frequency-modulated waveform based on the third wired waveform to generate a second composite modulation waveform. The antenna module radiates the first and second composite modulation waveforms to the destination. This application embodiment achieves parallel transmission of multiple data streams on a single millimeter-wave link by frequency modulation of a millimeter-wave carrier using a first wired waveform, generating a frequency-modulated waveform, and then amplitude modulation of the frequency-modulated waveform using a second and third wired waveforms respectively. Finally, the data is radiated through an antenna module. In other words, this application embodiment can achieve parallel transmission of multiple data streams under conditions of limited system complexity. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of the millimeter-wave transmitter modulation device provided in the embodiments of this application.

[0031] Figure 2 This is another structural schematic diagram of the millimeter-wave transmitter modulation device provided in the embodiments of this application.

[0032] Figure 3 This is a schematic diagram of the structure of the first waveform encoding module / second waveform encoding module provided in the embodiments of this application.

[0033] Figure 4a This is a schematic diagram of the waveform mapping process of the bipolar waveform provided in the embodiments of this application.

[0034] Figure 4b This is a schematic diagram of another waveform mapping process for bipolar waveforms provided in the embodiments of this application.

[0035] Figure 5 This is another structural schematic diagram of the first waveform encoding module / second waveform encoding module provided in the embodiments of this application.

[0036] Figure 6 This is an application scenario diagram of the millimeter-wave transmitter modulation device provided in the embodiments of this application.

[0037] Figure 7 This is a schematic flowchart of the millimeter-wave transmitter modulation method provided in the embodiments of this application. Detailed Implementation

[0038] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0039] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, components, features, and elements with the same names in different embodiments of this application may have the same meaning or different meanings, the specific meaning of which must be determined by its interpretation in that specific embodiment or further in conjunction with the context of that specific embodiment.

[0040] It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0041] In the following description, the use of suffixes such as "module," "part," or "unit" to denote elements is solely for the purpose of illustrative purposes and has no specific meaning in itself. Therefore, "module," "part," or "unit" may be used interchangeably.

[0042] In the description of this application, it should be noted that the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In addition, terms such as "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0043] Current short-range wireless alternatives are typically based on low-GHz frequency radio frequency communication or infrared links, such as 2.4GHz and 5GHz Wi-Fi and infrared communication protocols. However, these solutions, due to their low carrier frequencies and limited bandwidth, cannot provide transmission rates comparable to wired interfaces. Furthermore, they usually require complex protocol stacks and synchronization mechanisms, resulting in significant system latency, making them unsuitable for real-time transmission interface replacement scenarios, such as display signal transmission.

[0044] In recent years, millimeter-wave communication has become a popular alternative for short-range wireless communication due to its extremely high data rate. However, most existing millimeter-wave point-to-point communication links use a single-channel modulation structure. If a multi-lane wired interface needs to be replaced, either multiple chips need to be used for parallel transmission (such as STMicroelectronics' ST60A2 chip for multi-lane DP replacement) or a specially defined protocol stack is required (such as the DK1668 chip for LED displays). This is unacceptable for products with limited system space and complexity, such as mobile terminals like mobile phones and wearable electronics.

[0045] Based on this, this application provides a millimeter-wave transmitter modulation apparatus and method. The technical solutions shown in this application will be described in detail below through specific embodiments. It should be noted that the order of description of the following embodiments is not intended to limit the priority of the embodiments.

[0046] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of a millimeter-wave transmitter modulation device provided in an embodiment of this application. The millimeter-wave transmitter modulation device may include a first input terminal IN1, a second input terminal IN2, a third input terminal IN3, an oscillator 100, a first amplitude modulator 110, a second amplitude modulator 120, and an antenna module 130.

[0047] The first input terminal IN1, the second input terminal IN2, and the third input terminal IN3 are used to receive the first wired waveform, the second wired waveform, and the third wired waveform, respectively. The first wired waveform is a low-speed control signal, while the second and third wired waveforms are high-speed data signals. Specifically, it should be noted that the second and third wired waveforms have the same data rate and are time-synchronized. The data rate of the first wired waveform is lower than that of the second and third wired waveforms, and there is no time synchronization constraint between the first wired waveform and the second and third wired waveforms.

[0048] The oscillator 100 is electrically connected to the first input terminal IN1 and is used to frequency modulate the millimeter-wave carrier according to the first wired waveform to generate a frequency-modulated waveform. Specifically, the first wired waveform can be applied as a control signal to the control terminal of the oscillator 100 to frequency modulate the millimeter-wave carrier of the oscillator 100, so that the oscillator 100 outputs a frequency-modulated waveform that varies with the first wired waveform.

[0049] The first amplitude modulator 110 is electrically connected to the oscillator 100 and the second input terminal IN2, respectively, and is used to perform amplitude modulation on the frequency modulation waveform based on the second wired waveform to generate the first composite modulation waveform. The second amplitude modulator 120 is electrically connected to the oscillator 100 and the third input terminal IN3, respectively, and is used to perform amplitude modulation on the frequency modulation waveform based on the third wired waveform to generate the second composite modulation waveform.

[0050] The antenna module 130 is used to radiate the first composite modulation waveform and the second composite modulation waveform to the sink.

[0051] In specific implementation, when the first wired waveform is a digital waveform, the oscillator 100 can be a digital-controlled oscillator (DCO) with frequency-shift keying (FSK) modulation. When the first wired waveform is an analog waveform, the oscillator 100 is a voltage-controlled oscillator (VCO) with frequency modulation (FM).

[0052] When the second and third wired waveforms are digital waveforms, the amplitude modulation method is Amplitude Shift Keying (ASK) modulation, and the first amplitude modulator 110 and the second amplitude modulator 120 are ASK modulators. When the second and third wired waveforms are analog waveforms, the amplitude modulation method is Amplitude Modulation (AM) modulation.

[0053] For example, such as Figure 2 As shown, Figure 2 Another schematic diagram of a millimeter-wave transmitter modulation device is shown. In this embodiment, the first wired waveform, the second wired waveform, and the third wired waveform are all digital waveforms. However, in actual implementation, it is not excluded that only the second wired waveform and the third wired waveform are digital waveforms.

[0054] In some embodiments, when the second and third wired waveforms are binary digital waveforms, ASK is preferably used as the amplitude modulation method. For binary ASK, if no DC bias is applied (i.e., the minimum amplitude is 0), the binary ASK is equivalent to on-off keying modulation (OOK), and such unbiased binary ASK can be implemented by a switching modulation circuit, which is suitable for direct keying of binary level digital waveforms such as NRZ in eDP.

[0055] In the embodiments of this application, biased ASK modulation (hereinafter referred to as "biased ASK") is preferred. The difference between biased ASK and standard (unbiased) ASK is that a non-zero bias level is superimposed on the amplitude reference.

[0056] Taking the binary case as an example, the output amplitude of the standard binary ASK is {0, V}. h The output amplitude of the bias binary ASK is {V}. offset V offset +V h}, where V offset For bias level, V h For keying amplitude. Introduce V. offset This avoids zero-level modulation envelope, thereby reducing the negative impact of amplitude variations on oscillator 100 frequency / phase estimation and FM / FSK demodulation performance.

[0057] However, when the system link budget allows (e.g., the data rate of the first wired waveform is significantly lower than that of the second and third wired waveforms—generally understood to be at least two orders of magnitude lower), and the receiver has sufficient tolerance for the degradation in FM / FSK demodulation performance caused by zero amplitude, then an unbiased binary ASK (i.e., OOK) or a switching modulation circuit can be used instead of a biased implementation. The biased ASK given in the embodiments of this application is a preferred embodiment and not a limiting requirement; whether to use bias and the bias level V are specific to this application. offset The size can be selected and adjusted within the scope disclosed in this application, based on specific link budget, transmit power, antenna isolation, and allowable bit error rate, and other engineering indicators.

[0058] Since ASK modulation supports unipolar waveforms, when the second wired waveform and the third wired waveform are bipolar waveforms, waveform mapping processing is required before sending the second wired waveform and the third wired waveform to the first amplitude modulator 110 and the second amplitude modulator 120, respectively.

[0059] Specifically, such as Figure 2 As shown, when the second wired waveform and the third wired waveform are bipolar waveforms, the millimeter-wave transmitter modulation device further includes a first waveform encoding module 140 and a second waveform encoding module 150. The first waveform encoding module 140 is electrically connected between the second input terminal IN2 and the first amplitude modulator 110, and the second waveform encoding module 150 is electrically connected between the third input terminal IN3 and the second amplitude modulator 120.

[0060] like Figure 3 As shown, the first waveform encoding module 140 and the second waveform encoding module 150 include a DC bias 160 and a quantizer 170.

[0061] The DC bias unit 160 is located between the second input terminal IN2 / the third input terminal IN3 and the quantizer 170. The DC bias unit 160 applies a DC bias to the second or third wired waveform, converting it into a unipolar waveform (i.e., the waveform contains only positive levels or only levels above a non-zero reference). The bias level of the DC bias unit 160 can be set according to the tolerance of the first amplitude modulator 110, the second amplitude modulator 120, and the receiver demodulator.

[0062] The quantizer 170 is used to quantize the unipolar waveform and output a keying control word. Specifically, the quantizer 170 can quantize the unipolar waveform according to several preset thresholds, mapping continuous / distorted levels to discrete quantized levels. The output of the quantizer 170 constitutes the keying control word and serves as the modulation control signal for the first amplitude modulator 110 and the second amplitude modulator 120. It should be noted that the quantization thresholds can be fixed or adjusted by an adaptive algorithm during factory calibration or operation to compensate for transmission distortion.

[0063] Figure 4(a) illustrates the waveform mapping process using the common PAM3 bipolar waveform in USB4 V2 as an example: Due to ultra-short-distance transmission links and line distortion, the original discrete levels may appear as a continuous distribution upon reaching the transmitter. A unipolar waveform is obtained by applying a DC bias to this continuous level, and then quantized through two preset thresholds, resulting in three quantized levels (first quantization level (q0), second quantization level (q1), and third quantization level (q2)). This third-order quantized output is used as a keying code control word and fed into the first amplitude modulator 110 or the second amplitude modulator 120 for ASK modulation to generate a third-order ASK signal (3-ASK or equivalent PAM3-ASK). In a sense, the quantization process can "repair" the level ambiguity caused by transmission distortion and map the continuous distorted level into a discrete control word that can be recognized by the ASK modulator, thereby ensuring the robustness of subsequent modulation and decision-making.

[0064] Figure 4(b) illustrates the binary level case (e.g., NRZ in eDP): quantizer 170 requires only one preset threshold and outputs two quantization levels (first quantization level (q0) and second quantization level (q1)), in which case the ASK modulator degenerates into an OOK modulator. It should be noted that in the unbiased case of binary ASK (i.e., quantization level q0 = 0), this unbiased binary ASK is equivalent to on-off keyed modulation (OOK) and can be implemented by a switching modulation circuit; this case is suitable for implementations where the link budget allows for 0 levels and the degradation effect of FM / FSK demodulation is tolerable. Conversely, if biased ASK is used, quantizer 170 should be configured with DC bias 160 to output the minimum non-zero quantization level (e.g., quantization level {V... offset V offset +V h To avoid envelope levels that are completely zero, thus reducing the negative impact on oscillator 100 frequency / phase estimation and FM / FSK demodulation performance.

[0065] like Figure 5 As shown, the first waveform encoding module 140 and the second waveform encoding module 150 may further include an encoder 180, which is used to encode the keying code control word to suppress glitches (brief intermediate states) generated during code word switching, and then send the encoded keying code control word to the modulation control port of the first amplitude modulator 110 and the second amplitude modulator 120.

[0066] In some embodiments, third-order ASK modulators require multiple control lines to express control words in parallel (e.g., two lines are used to encode three valid codewords: 00, 01, and 10 represent the first, second, and third codewords, respectively, and 11 can be an invalid / reserved codeword). When there is a transmission delay between the parallel control lines or different rise / fall times of the drivers / connections, a brief intermediate bit combination C (i.e., a glitch) may occur during the transition from one codeword A to another codeword B. If this intermediate combination is sampled or driven by the ASK modulator, it will generate a short-term anomaly in the output envelope, expanding the bandwidth and interfering with adjacent channels or affecting downstream decisions. Therefore, it needs to be suppressed at the transmitting end.

[0067] The encoder 180 restricts the number of bit flips or the flip order between adjacent valid codewords by implementing constrained codeword mapping or additional conversion logic on the output of the quantizer 170, thereby significantly reducing the probability and duration of intermediate combinations caused by inter-line delay.

[0068] For example, Gray code mapping can be used to ensure that only one bit flips between any two adjacent codewords, or a constrained finite state machine (FSM) can be used to insert controlled transition codewords when necessary, or a sequential / handshake update mechanism can be used to ensure that multiple lines are stable simultaneously before output. It should be noted that the encoder can be implemented using combinational logic, trigger registers, FPGA logic, or dedicated ASIC circuits. Synchronous clocks, register isolation, short-pulse filtering circuits, or software / hardware level glitches can also be combined to further enhance glitch resistance.

[0069] In this embodiment, the antenna module 130 has two separated antenna elements with orthogonal polarization directions or a single antenna with an orthogonal dual-polarization feed structure, to achieve channel isolation on the transmitting side. Specifically, to ensure that the first composite modulation waveform and the second composite modulation waveform are reliably distinguished and correctly demodulated at the sink, this application preferably uses an antenna module 130 with high channel isolation on the transmitting and receiving sides. Figure 6 This illustration shows the schematic relationship between cross-interference and antenna isolation in the embodiments of this application. "Cross-interference" refers to two scenarios: the output energy of the first transmitting antenna is received by the second receiving antenna (i.e., first transmitting antenna → second receiving antenna), and the output energy of the second transmitting antenna is received by the first receiving antenna (i.e., second transmitting antenna → first receiving antenna). To suppress the aforementioned cross-interference and improve the link reliability of the system, this application preferentially adopts a polarization-based isolation scheme. This involves arranging two spatially separated antenna elements on the transmitting side, ensuring that the polarization directions of the two antennas are orthogonal (e.g., one is vertically polarized and the other is horizontally polarized), or using a single antenna with an orthogonal dual-polarization feed structure. Isolation between channels is achieved through polarization orthogonality and spatial distance.

[0070] This application also provides a millimeter-wave receiving device for receiving a first composite modulation waveform and a second composite modulation waveform emitted by the transmitter in the above embodiments, and recovering them into corresponding first wired waveforms, second wired waveforms, and third wired waveforms. The millimeter-wave receiving device includes at least two antenna input units, a separation / polarization selection module, two low-noise amplifiers and a linear amplification link, two AM / ASK demodulators, and an FM / FSK demodulator.

[0071] Specifically, the antenna input units are used to receive the first and second composite modulation waveforms emitted by the transmitter. The antenna input units can be paired with the transmitter, i.e., two separate antenna elements (with orthogonal polarization directions) or a single antenna with an orthogonal dual-polarization feed structure. The antenna bandwidth and gain are determined based on the selected operating frequency band and link budget. To reduce receiver link noise, the antenna front-end should be matched to the input impedance of a low-noise amplifier (LNA) and equipped with appropriate filters to suppress out-of-band interference.

[0072] The separation / polarization selection module is used to separate the two arriving composite modulation waveforms as much as possible in terms of space or polarization, so as to reduce cross-interference between channels.

[0073] Each signal output from the separation / polarization selection module enters its corresponding low-noise amplifier and subsequent linear amplification link. This low-noise amplifier should balance low noise with high linearity (e.g., a high OIP3) to ensure the integrity of the carrier's phase / frequency information even under amplitude modulation (AM / ASK) envelope variations, thus facilitating subsequent FM / FSK demodulation. The linear amplification link typically includes the following modules: a bandpass filter (selectively filtering adjacent channel interference), gain control (AGC), a driver amplifier, and optional limiting / linearization circuitry.

[0074] Two AM / ASK demodulators are configured after each linear amplification link to perform amplitude demodulation on the two composite modulated waveforms, recovering the high-speed data signals carried by the second and third wired waveforms. The AM / ASK demodulators can be implemented using envelope detectors, coherent detection (baseband / difference frequency), or hybrid analog / digital demodulation schemes.

[0075] Among them, the FM / FSK demodulator can use the carrier signal restored by the carrier bypass of the AM / ASK demodulator or the local reference for frequency detection, thereby recovering low-speed control data without compromising high-speed data recovery.

[0076] Figure 6 This illustrates a specific application scenario: wirelessly projecting the screen of a tablet computer (transmitter) onto a wireless display that magnetically attaches to it (receiver). For example... Figure 6 As shown, the left side is a tablet computer and the right side is a wireless display; the two are tightly attached by a magnetic structure, and the tablet computer casing and the display casing form a mechanical separation between the transmitting antenna and the receiving antenna.

[0077] The tablet PC houses a parallel ultra-short-range millimeter-wave transmitter (hereinafter referred to as the "transmitter"), while the wireless display houses a parallel ultra-short-range millimeter-wave receiver (hereinafter referred to as the "receiver"). The tablet PC's GPU outputs screen data via a dual-channel eDP#1 interface. The two Tx lanes of eDP#1 are respectively sent to the transmitter as the second and third wired waveforms (high-speed parallel data signals). If there are control commands such as brightness / contrast, the control information is sent to the transmitter as the first wired waveform (low-speed single-wire protocol, such as UART or SBUS). The transmitter modulates the three wired waveforms and transmits them through the antenna module 130. The receiver is responsible for restoring the two high-speed channels and outputting them to the eDP#2 receiver inside the display, while simultaneously restoring the low-speed control channel and sending it to the single-wire protocol receiver inside the display to execute the corresponding control commands.

[0078] The signal processing and transmission process at the transmitting end is as follows:

[0079] (1) High-speed channel processing: The two Tx lanes (second wired waveform and third wired waveform) of eDP#1 enter the bias / quantization / encoding module of the transmitter (when the Tx lane is a bipolar waveform), converting the bipolar level into a unipolar quantization control word; then the quantization output passes through an optional encoder to suppress codeword switching glitches, and finally serves as the ASK / AM modulation control word to drive the first amplitude modulator 110 and the second amplitude modulator 120, respectively, to perform amplitude keying on the frequency modulation waveform (FM or FSK) generated by the oscillator 100 and controlled by the first wired waveform, generating two composite modulation waveforms. If the link budget allows and the design adopts a biasless scheme, the binary ASK can be degenerated into OOK and implemented using a switching modulation circuit.

[0080] (2) Low-speed channel processing: The single-wire control protocol on the tablet computer is connected to the control terminal (VCO or DCO) of the oscillator 100 as the first wired waveform to perform frequency modulation (continuous FM or discrete FSK) on the millimeter wave carrier, thereby carrying low-speed control information at the instantaneous frequency of the carrier.

[0081] (3) Antenna transmission: The composite waveform after amplitude modulation of the two routes is fed into two separate antenna elements and transmitted in mutually intersecting polarization directions (for example, one antenna is vertically polarized and the other is horizontally polarized). The polarization directions of the transmitting antenna and the receiving antenna are matched to improve the received energy of the desired channel and reduce cross interference.

[0082] The specific processing and data recovery at the receiving end are as follows:

[0083] The receiver receives signals through two receiving antennas corresponding to the transmitter, and the separation / polarization selection module separates the two composite waveforms as much as possible. Each signal is then passed through a low-noise amplifier and a linear amplification link before entering an AM / ASK demodulator to recover the two Tx lane waveforms of the eDP (the second wired waveform and the third wired waveform). The recovered two lane waveforms are sent to the eDP#2 receiver inside the display for image decoding and to drive the display unit. At the same time, the receiver performs FM / FSK demodulation from the carrier or the carrier bypass signal retained in parallel by the AM / ASK demodulation path to recover the first wired waveform (low-speed control signal). The recovered control data is then parsed by the single-wire protocol receiver inside the display to implement control commands such as brightness and contrast.

[0084] Understandably, the transmitting and receiving antennas are separated by the tablet's casing and the display casing, with spatial isolation combined with polarization orthogonality achieving channel separation and isolation. If structural / size limitations prevent sufficient antenna spacing, a high-isolation antenna element with orthogonal dual-polarization feed can be used as a compromise. However, the impact of increased cross-coupling on the bit error rate must be considered in the link budget, and the transmitting power, receiving sensitivity, or a stronger equalization and error correction strategy should be adopted accordingly.

[0085] In summary, the millimeter-wave transmitter modulation device provided in this application includes a first input terminal IN1, a second input terminal IN2, a third input terminal IN3, an oscillator 100, a first amplitude modulator 110, a second amplitude modulator 120, and an antenna module 130. The first input terminal IN1 is used to receive a first wired waveform; the second input terminal IN2 is used to receive a second wired waveform; and the third input terminal IN3 is used to receive a third wired waveform. The second and third wired waveforms have the same data rate and are time-synchronized. The data rate of the first wired waveform is lower than that of the second and third wired waveforms. The oscillator 100 and... The first input terminal IN1 is electrically connected and used to frequency modulate the millimeter-wave carrier according to the first wired waveform to generate a frequency-modulated waveform. The first amplitude modulator 110 is electrically connected to the oscillator 100 and the second input terminal IN2, respectively, and is used to amplitude modulate the frequency-modulated waveform according to the second wired waveform to generate a first composite modulation waveform. The second amplitude modulator 120 is electrically connected to the oscillator 100 and the third input terminal IN3, respectively, and is used to amplitude modulate the frequency-modulated waveform according to the third wired waveform to generate a second composite modulation waveform. The antenna module 130 is used to radiate the first and second composite modulation waveforms to the destination. This embodiment of the application successfully achieves parallel transmission of multiple data streams on a single millimeter-wave link by using the first wired waveform to frequency modulate the millimeter-wave carrier to generate a frequency-modulated waveform, and then using the second and third wired waveforms to amplitude modulate the frequency-modulated waveform, respectively, and finally radiating it through the antenna module 130, while meeting the requirements of high speed, low power consumption, low latency and compact structure.

[0086] like Figure 7 As shown in the figure, this application embodiment also provides a millimeter-wave transmitter modulation method, which is applied to the above-mentioned millimeter-wave transmitter modulation device. The specific process of the millimeter-wave transmitter modulation method can be as follows:

[0087] 101. Receive the first wired waveform, the second wired waveform, and the third wired waveform. The second wired waveform and the third wired waveform have the same data rate and are time-synchronized. The data rate of the first wired waveform is lower than that of the second wired waveform and the third wired waveform.

[0088] 102. Frequency modulate the millimeter-wave carrier wave according to the first wired waveform to generate a frequency-modulated waveform;

[0089] 103. Amplitude modulation is performed on the frequency modulation waveform based on the second wired waveform to generate the first composite modulation waveform;

[0090] 104. Amplitude modulation is applied to the frequency modulation waveform based on the third wired waveform to generate a second composite modulation waveform;

[0091] 105. Radiation of the first composite modulation waveform and the second composite modulation waveform to the receiver.

[0092] For specific implementation methods of each of the above steps, please refer to the embodiments of the millimeter-wave transmitter modulation device described above, which will not be repeated here.

[0093] In summary, the millimeter-wave transmitter modulation method provided in this application includes receiving a first wired waveform, a second wired waveform, and a third wired waveform. The second and third wired waveforms have the same data rate and are time-synchronized, while the data rate of the first wired waveform is lower than that of the second and third wired waveforms. The method involves frequency modulation of a millimeter-wave carrier based on the first wired waveform to generate a frequency-modulated waveform; amplitude modulation of the frequency-modulated waveform based on the second wired waveform to generate a first composite modulation waveform; amplitude modulation of the frequency-modulated waveform based on the third wired waveform to generate a second composite modulation waveform; and radiating the first and second composite modulation waveforms to the destination. This application successfully achieves parallel transmission of multiple data streams on a single millimeter-wave link by using the first wired waveform to frequency-modulate a millimeter-wave carrier, generating a frequency-modulated waveform, and then using the second and third wired waveforms to amplitude-modulate the frequency-modulated waveform, respectively, before finally radiating it through an antenna module. In other words, this application can achieve parallel transmission of multiple data streams under conditions of limited system complexity.

[0094] The above provides a detailed description of the millimeter-wave transmitter modulation device and method provided in this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the core ideas of this application. At the same time, those skilled in the art will recognize that there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A millimeter-wave transmitter modulation device, characterized in that, include: The first input terminal is used to receive the first wired waveform; The second input terminal is used to receive the second wired waveform; The third input terminal is used to receive a third wired waveform, wherein the data rates of the second wired waveform and the third wired waveform are the same and time-synchronized, and the data rate of the first wired waveform is lower than that of the second wired waveform and the third wired waveform; An oscillator, electrically connected to the first input terminal, is used to frequency modulate the millimeter-wave carrier according to the first wired waveform to generate a frequency-modulated waveform. A first amplitude modulator is electrically connected to the oscillator and the second input terminal, respectively, and is used to perform amplitude modulation on the frequency modulation waveform based on the second wired waveform to generate a first composite modulation waveform. The second amplitude modulator is electrically connected to the oscillator and the third input terminal, respectively, and is used to perform amplitude modulation on the frequency modulation waveform based on the third wired waveform to generate a second composite modulation waveform. An antenna module is used to radiate the first composite modulation waveform and the second composite modulation waveform to the receiver.

2. The millimeter-wave transmitter modulation device as described in claim 1, characterized in that, When the first wired waveform is a digital waveform, the oscillator is a digitally controlled oscillator, and the frequency modulation method is FSK modulation.

3. The millimeter-wave transmitter modulation device as described in claim 1, characterized in that, When the first wired waveform is an analog waveform, the oscillator is a voltage-controlled oscillator, and the frequency modulation method is FM modulation.

4. The millimeter-wave transmitter modulation device as described in claim 1, characterized in that, When the second wired waveform and the third wired waveform are digital waveforms, the amplitude modulation method is ASK modulation.

5. The millimeter-wave transmitter modulation device as described in claim 4, characterized in that, When the second wired waveform and the third wired waveform are bipolar waveforms, the millimeter-wave transmitter modulation device further includes a first waveform encoding module and a second waveform encoding module. The first waveform encoding module is electrically connected between the second input terminal and the first amplitude modulator, and the second waveform encoding module is electrically connected between the third input terminal and the second amplitude modulator.

6. The millimeter-wave transmitter modulation device as described in claim 5, characterized in that, The first waveform encoding module and the second waveform encoding module include a DC bias and a quantizer; the DC bias is used to apply a DC bias to the second wired waveform or the third wired waveform and convert it into a unipolar waveform; the quantizer is used to quantize the unipolar waveform and output a keying code control word.

7. The millimeter-wave transmitter modulation device as described in claim 6, characterized in that, The first waveform encoding module and the second waveform encoding module further include an encoder, which is used to encode the keying control word to suppress glitches generated during code word switching.

8. The millimeter-wave transmitter modulation device as described in claim 4, characterized in that, The ASK modulation is biased ASK modulation.

9. The millimeter-wave transmitter modulation device as described in claim 1, characterized in that, The antenna module has two separated antenna elements with orthogonal polarization directions or a single antenna with an orthogonal dual-polarization feed structure to achieve channel isolation on the transmitting side.

10. A millimeter-wave transmitter modulation method, applied to the millimeter-wave transmitter modulation apparatus as described in any one of claims 1-9, characterized in that, The millimeter-wave transmitter modulation method includes: Receive a first wired waveform, a second wired waveform, and a third wired waveform. The second wired waveform and the third wired waveform have the same data rate and are time-synchronized. The data rate of the first wired waveform is lower than that of the second wired waveform and the third wired waveform. The millimeter-wave carrier is frequency modulated according to the first wired waveform to generate a frequency-modulated waveform. The frequency modulation waveform is amplitude modulated based on the second wired waveform to generate a first composite modulation waveform. The frequency modulation waveform is amplitude modulated based on the third wired waveform to generate a second composite modulation waveform. The first composite modulation waveform and the second composite modulation waveform are radiated to the sink.

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