A shortwave channel transceiver system based on fiber optic extension

Abstract

This invention relates to the field of shortwave wireless communication technology and discloses a shortwave channel transceiver system based on fiber optic extension. The system divides the shortwave service signal into a calibration segment and a service segment to establish transceiver frames. The carrier frequency is recorded, and the memory span is determined by the calibration segment. The root mean square value of the effective voltage of the service segment is extracted to construct the transmit-side memory intensity and average value. The calibration segment is extended via fiber optic cable to collect voltage, current, and return light intensity at the remote end, obtaining equivalent radiation resistance, safe current, and light intensity statistics. This forms the peak state and memory deviation, and generates an anti-torsion service segment. The optical carrier depth and complex envelope are adaptively obtained. The system is pre-driven at the remote end and safely compressed before transmission, and the receiver performs inverse mapping to recover the signal. This solves problems such as difficulty in load perception, impedance deviation leading to overcurrent, distortion superposition, and saturation or waste due to fixed modulation depth, improving safety and recoverability.

Description

Technical Field

[0001] This invention relates to the field of shortwave wireless communication technology, specifically to a shortwave channel transceiver system based on extended optical fiber. Background Technology

[0002] Shortwave communication, with its ability to achieve beyond-line-of-sight transmission via the ionosphere, has been continuously used in emergency communications, long-distance command and dispatch, maritime communications, and communication support in complex geographical environments. To address the limitations imposed by site constraints, electromagnetic compatibility, and antenna placement conditions on the centralized deployment of high-power shortwave transmitting equipment, existing engineering projects typically transmit baseband or intermediate frequency signals via fiber optic links to a remote radio frequency unit, where power amplification and antenna radiation are then performed, forming a high-power shortwave transmission architecture with extended fiber optic connections. On the receiving side, existing systems generally down-convert the received signal before sending it back to the central station, or perform partial reception processing at the remote end before transmitting it back via fiber optics. This technology can shorten the length of high-power radio frequency feeders, reduce transmission loss, and improve site deployment flexibility, thus becoming one of the important implementation methods for high-power shortwave systems.

[0003] However, existing technologies still have significant shortcomings when applied to high-power shortwave channels. First, shortwave service signals have a high peak-to-average power ratio (PAPR), and the remote power amplification link is prone to peak compression, amplitude and phase distortion, and mismatch distortion caused by changes in the equivalent impedance of the antenna port when operating at high power, leading to deviations between the transmitted waveform and the original service signal. Second, existing compensation methods often focus on static amplitude correction or simple pre-distortion, making it difficult to simultaneously address the memory effect formed by the power amplification unit, antenna loop, and fiber optic remote link, and failing to accurately reflect the impact of energy tails from previous and subsequent moments on the current transmission state. Third, the optical modulation depth in fiber optic remote links is usually set according to fixed rules, lacking a linkage adjustment mechanism with shortwave service segment peak-state changes, remote current safety boundaries, and return light intensity swing states, easily resulting in insufficient or excessive optical modulation, further amplifying nonlinear distortion at the transmitting end. Fourth, existing receiver recovery methods often only perform conventional amplitude normalization or equalization on the received signal, without establishing a consistent inverse mapping relationship with the transmitting end's compression behavior, making it difficult for the receiver to effectively recover compressed and memory-effect-perturbed service information.

[0004] Therefore, this proposal aims to create a shortwave channel transceiver system based on fiber optic extension. First, a calibration segment is used to synchronously collect the equivalent voltage, equivalent current, and return light intensity at the antenna port at the remote end, forming statistics on equivalent radiation resistance, safe current, and return light intensity. Then, based on these observables, two types of deviation characteristics—peak state and memory—are constructed, and corresponding peak state anti-torque and memory anti-torque are generated in reverse. This preprocesses the service segment from the transmitting side. Simultaneously, the preprocessed service segment is mapped to a normalized optical carrier field complex envelope adapted to fiber optic extension, forming a pre-drive at the remote end and superimposed with safe compression fallback to avoid device risks caused by overcurrent and peak overflow. Finally, at the receiving end, inverse mapping recovery is performed by combining the safe compression output peak value and memory span, balancing security and recoverability. Summary of the Invention

[0005] This invention provides a shortwave channel transceiver system based on extended optical fiber, which helps to solve the problems mentioned in the background art.

[0006] This invention provides the following technical solution: a shortwave channel transceiver method based on fiber optic extension, comprising: The shortwave service signal to be transmitted is divided into calibration segment and service segment, a transmit / receive frame is established, the shortwave carrier frequency is recorded, and the memory span is obtained based on the conjugate autocorrelation amplitude of the calibration segment. Extract the root mean square value of the effective voltage of the service segment, combine it with the memory span to construct the transmit-side memory strength, and obtain the transmit-side memory average strength; The calibration segment is directly sent into the fiber optic remote link, and the equivalent voltage, equivalent current and return light intensity of the antenna port are collected synchronously at the remote end. The equivalent radiation resistance, safe current and return light intensity statistics are obtained. Based on the antenna port equivalent voltage, antenna port equivalent current, shortwave carrier frequency, safe current, and return light intensity statistics, peak-state deviation function and memory deviation function are established respectively, and peak-state deviation function value and memory deviation function value are generated. Based on the peak-state deviation function value, the root mean square value of the effective voltage of the service segment, the memory deviation function value, the average strength of the transmitter memory and the strength of the transmitter memory, the peak-state anti-torque, the memory anti-torque, and the anti-torque service segment are constructed. The optical carrier depth is obtained based on the anti-torsion service segment and the backhaul optical intensity statistics, and the normalized optical carrier field complex envelope of the optical fiber remote link is formed. At the far end, the far-end pre-drive voltage, safe compression output voltage and safe compression output peak are formed according to the normalized optical carrier field complex envelope, and high-power shortwave transmission is performed after up-conversion according to the shortwave carrier frequency. At the receiving end, the complex baseband voltage is inversely mapped and recovered based on the secure compressed output peak value, memory span, peak-state anti-torque, and memory anti-torque, thus forming the service segment recovery result.

[0007] Optionally, the step of dividing the shortwave service signal to be transmitted into a calibration segment and a service segment, establishing transmit / receive frames, recording the shortwave carrier frequency, and obtaining the memory span based on the conjugate autocorrelation amplitude of the calibration segment specifically includes: The shortwave service signal to be transmitted is divided into a calibration segment and a service segment, and the duration of the calibration segment, the duration of the service segment, and the shortwave carrier frequency are recorded. For each continuous delay, the effective duration obtained by subtracting the current continuous delay from the duration of the calibration segment is used as the integration interval. Within the integration interval corresponding to the effective duration obtained by subtracting the current continuous delay from the duration of the calibration segment, the complex equivalent baseband voltage of the calibration segment at the current moment is multiplied by the conjugate value of the complex equivalent baseband voltage of the calibration segment after the corresponding continuous delay, and integrated. Then, it is divided by the effective duration obtained by subtracting the current continuous delay from the duration of the calibration segment to form the conjugate autocorrelation amplitude of the calibration segment with respect to the current continuous delay. When the conjugate autocorrelation amplitude of the calibration segment at zero delay is greater than zero, within the range from zero to the duration of the calibration segment, the smallest delay that causes the conjugate autocorrelation amplitude of the calibration segment to first decay to no more than half of the conjugate autocorrelation amplitude at zero delay is selected as the memory span. When the conjugate autocorrelation amplitude of the calibration segment at zero delay is zero, or there is no delay that satisfies the semi-correlation decay condition, the duration of the calibration segment is taken as the memory span. After the memory span is acquired, the memory span will remain unchanged within the current transmit / receive frame.

[0008] Optionally, the step of extracting the root mean square value of the effective voltage of the service segment, constructing the transmit-side memory strength in combination with the memory span, and obtaining the transmit-side memory average strength specifically includes: Integrate the modulus-square voltage at each consecutive time point of the service segment, divide it by the duration of the service segment, and take the square root of the result to form the root mean square value of the effective voltage of the service segment. For each continuous time within a service segment, compare the current continuous time with the memory span, and take the smaller of the two values ​​as the upper limit of the transmitter-side memory integration corresponding to the current continuous time. For each continuous time within the service segment, within the interval from zero to the upper limit of the transmitter-side memory integration corresponding to the current continuous time, the square of the complex-valued equivalent baseband voltage modulus of the service segment at the backtracking time is weighted and integrated according to the weight that decays linearly with the backtracking delay, and then divided by the memory span to form the transmitter-side memory strength corresponding to the current continuous time. The transmit-side memory intensity corresponding to each consecutive time within the service segment is integrated and then divided by the duration of the service segment to form the average transmit-side memory intensity.

[0009] Optionally, the step of directly sending the calibration segment into the fiber optic remote link, synchronously acquiring the antenna port equivalent voltage, antenna port equivalent current, and return light intensity at the remote end, and obtaining the equivalent radiation resistance, safe current, and return light intensity statistics, specifically includes: The calibration segment is sent directly into the fiber optic remote link without applying anti-torsion mapping; Simultaneously collect the equivalent voltage, equivalent current, and remote return light intensity of the remote antenna port within the calibration range; When the integral of the square of the equivalent current at the antenna port within the calibration range is greater than zero, the conjugate values ​​of the equivalent voltage and the equivalent current at the antenna port are multiplied and integrated within the calibration range to obtain the real part of the integral result. The negative values ​​in the real part of the integral result are truncated to zero and then divided by the integral of the square of the equivalent current at the antenna port within the calibration range to form the equivalent radiation resistance. When the integral of the square of the modulus of the equivalent current at the antenna port within the calibration range is zero, the equivalent radiation resistance is recorded as zero. Integrate the equivalent current at the antenna port over the calibration period and divide it by the duration of the calibration period to form the average current of the calibration period. Integrate the square of the magnitude of the difference between the equivalent current at the antenna port and the average current in the calibration section within the calibration section, divide it by the duration of the calibration section, and add it to the average current in the calibration section to form the safety current. Within the calibration range, the maximum and minimum values ​​of the returned light intensity are calculated respectively. The maximum and minimum values ​​of the returned light intensity are added together and then divided by two to form the center value of the returned light intensity.

[0010] Optionally, the step of establishing a peak-state deviation function and a memory deviation function based on the antenna port equivalent voltage, antenna port equivalent current, shortwave carrier frequency, safe current, and return light intensity statistics, and forming peak-state deviation function values ​​and memory deviation function values, specifically includes: When the safe current is greater than zero and the equivalent radiation resistance is greater than zero, the instantaneous impedance deviation of the antenna port is formed by subtracting the product of the equivalent radiation resistance and the equivalent current of the antenna port from the equivalent voltage of the antenna port. The instantaneous impedance deviation of the antenna port is then divided by the product of the equivalent radiation resistance and the safe current to form the normalized impedance deviation. The square of the magnitude of the normalized impedance deviation is integrated within the calibration segment and divided by the duration of the calibration segment to form the first part of the peak-state deviation function. The portion of the equivalent current of the antenna port that exceeds the safe current is then truncated, the truncated result is divided by the safe current, squared, integrated within the calibration segment, and divided by the duration of the calibration segment to form the second part of the peak-state deviation function. The first part of the peak-state deviation function and the second part of the peak-state deviation function are added together to form the peak-state deviation function value. When the safe current is zero, the peak deviation function value is recorded as zero; When the equivalent radiation resistance is zero and the safe current is greater than zero, the part of the equivalent current at the antenna port that exceeds the safe current is truncated, the truncated result is divided by the safe current and squared, and then integrated within the calibration segment and divided by the duration of the calibration segment to form the peak deviation function value. When the safe current is greater than zero and the center value of the returned light intensity is greater than zero, calculate the first-order rate of change of the equivalent current at the antenna port with respect to continuous time, divide it by twice pi, the product of the shortwave carrier frequency and the safe current, square it, integrate it within the calibration segment, and divide it by the duration of the calibration segment to form the first part of the memory bias function; then, divide the difference between the returned light intensity and the center value of the returned light intensity by the center value of the returned light intensity, square it, integrate it within the calibration segment, and divide it by the duration of the calibration segment to form the second part of the memory bias function; add the first part of the memory bias function to the second part of the memory bias function to form the memory bias function value; When the safe current is greater than zero and the center value of the returned light intensity is equal to zero, only the first part of the memory deviation function based on the first-order rate of change of the equivalent current of the antenna port with respect to continuous time is retained to form the memory deviation function value; when the safe current is equal to zero and the center value of the returned light intensity is greater than zero, only the second part of the memory deviation function based on the swing of the returned light intensity relative to the center value of the returned light intensity is retained to form the memory deviation function value. When the safe current is zero and the center value of the returned light intensity is zero, the memory deviation function value is recorded as zero.

[0011] Optionally, the step of constructing the peak-state anti-torque, memory anti-torque, and anti-torque service segment based on the peak-state deviation function value, the root mean square value of the effective voltage of the service segment, the memory deviation function value, the average strength of the transmitter-side memory, and the strength of the transmitter-side memory specifically includes: When the root mean square value of the effective voltage of the service segment is greater than zero, the peak-state deviation function value is divided by the square of the root mean square value of the effective voltage of the service segment to form the peak-state reverse torque; when the root mean square value of the effective voltage of the service segment is equal to zero, the peak-state reverse torque is recorded as zero. When the average strength of the transmitter-side memory is greater than zero, the memory deviation function value is divided by the average strength of the transmitter-side memory to form the memory anti-torque; when the average strength of the transmitter-side memory is equal to zero, the memory anti-torque is recorded as zero. When the root mean square value of the effective voltage of the service segment is greater than zero, the kurtosis term and the memory term are subtracted from the complex equivalent baseband voltage of the service segment in each continuous time. The kurtosis term is the product of the kurtosis reverse torque, the complex equivalent baseband voltage of the service segment, and the modulus square voltage of the service segment. The memory term is the product of the memory reverse torque, the transmit-side memory intensity of the corresponding continuous time, and the complex equivalent baseband voltage of the service segment. The reverse torque output voltage corresponding to each continuous time is formed, and the reverse torque service segment is composed of the reverse torque output voltage corresponding to each continuous time. When the root mean square value of the effective voltage of the service segment is equal to zero, the reverse torque output voltage corresponding to each continuous time is recorded as zero, and the reverse torque service segment is formed by the reverse torque output voltage corresponding to each continuous time.

[0012] Optionally, the step of obtaining the optical carrier depth based on the anti-torsion service segment and the backhaul optical intensity statistics, and forming the normalized optical carrier field complex envelope of the input fiber remote link, specifically includes: Integrate the square of the magnitude of the reverse torque output voltage within the service segment, divide it by the duration of the service segment, and take the square root of the result to form the root mean square value of the reverse torque output. Calculate the peak value of the reverse torque output voltage within the service segment to form the reverse torque output peak value; When the peak value of the reverse twist output is greater than zero, divide twice the root mean square value of the reverse twist output by the sum of the peak value and the root mean square value of the reverse twist output to form the first proportional term; then divide the center value of the returned light intensity by the peak value of the reverse twist output to form the second proportional term; multiply the first proportional term and the second proportional term to form the optical carrying depth; when the peak value of the reverse twist output is equal to zero, the optical carrying depth is recorded as zero. When the peak value of the reverse torsion output is greater than zero, the reverse torsion output voltage corresponding to each consecutive time is divided by the peak value of the reverse torsion output, multiplied by the optical carrier depth, and one is added to the result to form the normalized optical carrier field complex envelope corresponding to each consecutive time; when the peak value of the reverse torsion output is equal to zero, the normalized optical carrier field complex envelope corresponding to each consecutive time is recorded as one.

[0013] Optionally, the step of forming a remote pre-drive voltage, a safe compressed output voltage, and a safe compressed output peak value based on the normalized optical carrier field complex envelope at the remote end, and then performing high-power shortwave transmission after up-conversion to the shortwave carrier frequency, specifically includes: When the optical carrier depth is greater than zero, the result of subtracting one from the normalized optical carrier field complex envelope is multiplied by the anti-torsion output peak value and then divided by the optical carrier depth to form the far-end pre-drive voltage; when the optical carrier depth is equal to zero, the far-end pre-drive voltage is recorded as zero. When the reverse torque output peak value is greater than zero, the safe current is greater than zero, the equivalent radiation resistance is greater than zero, and the minimum return light intensity is greater than zero, first, the result of subtracting the safe current from the equivalent radiation resistance is taken as a positive value. Then, the reverse torque output peak value is divided by the positive value of subtracting the safe current from the equivalent radiation resistance, and then divided by the product of the safe current and the square of the reverse torque output peak value to form the first part of the safe compression amount. Next, the difference between the maximum return light intensity and the minimum return light intensity is divided by the product of the minimum return light intensity and the square of the reverse torque output peak value to form the second part of the safe compression amount. The first part of the safe compression amount and the second part of the safe compression amount are added together to form the safe compression amount. When the reverse torque output peak value is greater than zero, the safe current is greater than zero, the equivalent radiation resistance is greater than zero, and the minimum returned light intensity is equal to zero, only the first part of the safe compression amount based on the equivalent radiation resistance, safe current, and reverse torque output peak value is retained to form the safe compression amount; when the reverse torque output peak value is greater than zero, the safe current is equal to zero, and the minimum returned light intensity is greater than zero, only the second part of the safe compression amount based on the maximum returned light intensity, minimum returned light intensity, and reverse torque output peak value is retained to form the safe compression amount; when the reverse torque output peak value is greater than zero, the safe current is greater than zero, When the equivalent radiation resistance is zero and the minimum return light intensity is greater than zero, only the second part of the safety compression amount formed by the maximum return light intensity, the minimum return light intensity, and the peak value of the reverse torque output is retained to form the safety compression amount; when the peak value of the reverse torque output is zero, the safety compression amount is recorded as zero; when the peak value of the reverse torque output is greater than zero, the safety current is zero, and the minimum return light intensity is zero, the safety compression amount is recorded as zero; when the peak value of the reverse torque output is greater than zero, the safety current is greater than zero, the equivalent radiation resistance is zero, and the minimum return light intensity is zero, the safety compression amount is recorded as zero. Divide the remote pre-drive voltage by the sum of the products of one and two times the safe compression amount and the square of the modulus of the remote pre-drive voltage to form the safe compression output voltage corresponding to each consecutive time. Calculate the peak value of the safe compression output voltage within the service segment to form the safe compression output peak value; The safe compressed output voltage is used as the final driving quantity for the high-power shortwave transmission at the far end, and after up-conversion according to the shortwave carrier frequency, it is sent to the power amplifier unit and the antenna unit.

[0014] Optionally, the step of performing inverse mapping recovery on the receiver's complex baseband voltage based on the secure compression output peak value, memory span, peak-mode anti-torque, and memory anti-torque to form the service segment recovery result specifically includes: Obtain the complex baseband voltage at each consecutive time point of the receiver; When the peak value of the secure compression output is greater than zero and the peak value of the complex baseband voltage at the receiving end is greater than zero, the peak value of the secure compression output is divided by the peak value of the complex baseband voltage at the receiving end, and then multiplied by the complex baseband voltage at the receiving end at each consecutive time point to form the equivalent received quantity after amplitude calibration for each consecutive time point; when the peak value of the secure compression output is equal to zero, the equivalent received quantity after amplitude calibration for each consecutive time point is recorded as zero; when the peak value of the complex baseband voltage at the receiving end is equal to zero, the equivalent received quantity after amplitude calibration for each consecutive time point is recorded as zero. Under the condition that the product of the double safety compression and the square of the equivalent received quantity modulus after amplitude calibration is less than one, the equivalent received quantity after amplitude calibration is divided by one and the product of the double safety compression and the square of the equivalent received quantity modulus after amplitude calibration is subtracted to form the compression inverse recovery pre-recovery quantity corresponding to each continuous time. For each continuous time within a service segment, compare the current continuous time with the memory span, and take the smaller of the two values ​​to form the upper limit of the receiver's memory integral corresponding to the current continuous time. For each continuous time within the service segment, within the interval from zero to the upper limit of the receiver memory integration corresponding to the current continuous time, the square of the modulus of the compressed inverse recovery pre-recovery amount at the backtracking time is weighted and integrated according to the weight that decays linearly with the backtracking delay, and then divided by the memory span to form the receiver memory intensity corresponding to the current continuous time. Using the compressed inverse recovery pre-recovery amount as the numerator, and the sum of the product of the first-order reverse torque and the square of the modulus of the compressed inverse recovery pre-recovery amount, and the product of the memory reverse torque and the received memory intensity as the denominator, the calculation is performed for each continuous time of the service segment to form the service segment recovery result.

[0015] A system for implementing the aforementioned shortwave channel transceiver method based on fiber optic extension includes: Transceiver frame establishment and memory span processing module: Divides the shortwave service signal to be transmitted into calibration segment and service segment, records the shortwave carrier frequency, and obtains the memory span based on the conjugate autocorrelation amplitude of the calibration segment; Service segment effective voltage root mean square value and transmitter side memory intensity extraction module: extracts the effective voltage root mean square value of the service segment, constructs the transmitter side memory intensity, and obtains the transmitter side memory average intensity; Remote equivalent state extraction module: Performs fiber optic transmission for calibration section, and collects antenna port equivalent voltage, antenna port equivalent current and return light intensity at the remote end to obtain equivalent radiation resistance, safe current and return light intensity statistics; Peak-to-peak deviation function and memory deviation function establishment module: Based on the antenna port equivalent voltage, antenna port equivalent current, shortwave carrier frequency, safe current and return light intensity statistics, the peak-to-peak deviation function and memory deviation function are established, and the peak-to-peak deviation function value and memory deviation function value are generated; Anti-torsion service segment formation module: Based on the peak deviation function value, memory deviation function value, root mean square value of effective voltage of service segment, average strength of transmitter memory and strength of transmitter memory, the peak anti-torsion amount, memory anti-torsion amount and anti-torsion service segment are obtained; Optical carrier depth and normalized optical carrier field complex envelope formation module: Based on the anti-torsion service segment and backhaul light intensity statistics, the optical carrier depth is obtained and the normalized optical carrier field complex envelope is formed. Remote transmission and secure compression module: Based on the normalized optical carrier field complex envelope, it forms the remote pre-drive voltage, secure compression output voltage and secure compression output peak value, and performs high-power shortwave transmission after up-conversion to the shortwave carrier frequency; Receiver-end inverse mapping recovery module: Based on the secure compression output peak value, memory span, peak-state anti-torque, and memory anti-torque, it performs inverse mapping recovery on the receiver-end complex baseband voltage to form the service segment recovery result.

[0016] The present invention has the following beneficial effects: Based on segmented framing of calibration and service segments, the determination of shortwave carrier frequency recording and memory span is moved to the processing entry point of each frame. The memory span is obtained by using the correlation attenuation characteristics of the calibration segment, thus transforming the time range of the memory effect from an empirical setting to a data-driven quantitative result. Instead of simply using a fixed window or fixed order to describe memory, it uses the correlation attenuation of the calibration segment itself to define the range of negligible and non-negligible historical influences. This ensures that subsequent memory strength construction, memory bias assessment, and memory anti-torsion formation all share the same memory span basis. When changes in channel, power amplifier, or link status cause the memory effect to intensify or weaken, the memory span adapts to the frame, avoiding the common problems in existing technologies where excessively short windows lead to residual memory distortion, while excessively long windows increase computational burden and introduce irrelevant historical noise. Simultaneously, the carrier frequency is uniformly recorded here, providing a consistent reference basis for subsequent characterization of deviations related to the rate of change and the carrier frequency, reducing the risk of inconsistencies in cross-module parameters.

[0017] On the one hand, the root mean square (RMS) value of the effective voltage of the service segment is extracted to establish a unified metric for the energy scale of the service segment. On the other hand, the transmit-side memory intensity, which varies over time, is constructed around the memory span, and the average transmit-side memory intensity is further obtained. The memory effect is transformed from an abstract system with memory into a calculable memory intensity curve that can change over time within the service segment. The average intensity is used to form a statistical quantity that can be used for decision-making across the entire segment, thereby achieving a dual-layer characterization of the impact of local transient memory and the overall memory level of the entire segment. In shortwave service signals with bursty peaks and large envelope fluctuations, memory intensity is sensitive to the accumulation of historical energy and can reflect the hysteresis effects caused by slow variables such as thermal and charge storage of actual devices. Compared with existing technologies that adjust preprocessing parameters based solely on instantaneous amplitude or a single power index, this solution provides an intermediate quantity that is more in line with the actual distortion mechanism, improving the targeting of subsequent memory deviation and memory anti-torsion. At the same time, the RMS metric allows the intensity of different service segments to be normalized and compared, avoiding deviations caused by relying solely on peak or average power.

[0018] The calibration section directly enters the fiber optic remote link without applying anti-torsion mapping. At the remote end, it synchronously collects the equivalent voltage, equivalent current, and return light intensity at the antenna port, and uses this data to form statistics on equivalent radiation resistance, safe current, and return light intensity. Multi-source observable joint calibration: It not only considers the single quantity of remote voltage or current, but also uses the coupling relationship between voltage and current to characterize the equivalent radiation resistance of the antenna port, thus explicitly incorporating antenna port impedance fluctuations into subsequent deviation assessments. Simultaneously, it introduces statistics such as the maximum, minimum, and center values ​​of the return light intensity, allowing the optical side state of the fiber optic remote link to participate in control with quantifiable feedback quantities. In high-power shortwave scenarios, changes in antenna port impedance directly trigger overcurrent risks and efficiency fluctuations. The formation of equivalent radiation resistance allows the system to identify impedance deviation trends within the same frame; the formation of safe current transforms power amplifier protection from passive alarm to a feedforward-constrained threshold input, reducing the probability of overload triggering and waveform collapse.

[0019] Using equivalent radiation resistance, safe current, return light intensity statistics, and shortwave carrier frequency as inputs, peak-state bias and memory bias functions are established, and their corresponding function values ​​are generated. Distortion and risk are decomposed into two complementary bias channels—peak-state bias focuses on characterizing antenna port impedance deviation and peak overflow, while memory bias focuses on characterizing the dynamic and link memory characteristics reflected by the rate of current change and the return light intensity swing. This decomposition allows subsequent compensation to avoid brute-force application of a single error index, instead modeling and constraining peak-type and memory-type problems separately. When the system faces impedance abrupt changes, peak-state bias can promptly reflect the coupling risk of instantaneous impedance deviation and overcurrent overflow; when the system faces historical cumulative effects caused by slow variable drift or envelope dynamics, memory bias can reflect the combined effects of the rate of change and optical swing, thus avoiding misjudgments caused by only considering the electrical side.

[0020] Based on the peak-state deviation function value, memory deviation function value, root mean square value of effective voltage of the service segment, average strength of transmit-side memory, and transmit-side memory strength, peak-state anti-torque and memory anti-torque quantities are constructed, forming an anti-torque service segment. Peak-type nonlinearity and memory-type nonlinearity are transformed into executable reverse adjustment quantities, and the two are normalized and linked with a unified service segment scale quantity and memory strength quantity, so that anti-torque is not an isolated static preprocessing, but is synchronously matched with service segment strength and historical impact. Faced with the reality of high-power shortwave services with dense peaks, large envelope fluctuations, and significant antenna port load changes, simple static predistortion is prone to being effective in some power ranges but ineffective in others; while this scheme focuses peak-state anti-torque on transient distortion caused by peak overflow and impedance deviation, and focuses memory anti-torque on hysteresis distortion caused by historical energy accumulation. The anti-torque service segment formed by the superposition of the two can better cover the dynamics of the entire segment.

[0021] The optical carrier depth is obtained based on the anti-torsion service segment and the return optical intensity statistics, forming a normalized optical carrier field complex envelope for the fiber optic remote link. The mapping parameters on the fiber optic remote side are linked with the remote return optical intensity statistics, making the optical modulation depth no longer a fixed configuration, but a dynamic result matched with the link state and the envelope of the anti-torsion service segment. Simultaneously, normalization processing maps the anti-torsion service segment to an envelope range suitable for fiber optic link transmission, reducing the risk of optical saturation and distortion. In high-power shortwave scenarios, electrical anti-torsion does not necessarily mean optical linearity. If the optical carrier depth is mismatched, clipping or abnormal return swing caused by excessive optical modulation may still occur. This solution incorporates statistics such as the center value of the return optical intensity into the depth formation process, enabling the fiber optic link to maintain a more stable operating range under different optical path losses and device states.

[0022] At the remote end, a pre-driving voltage is formed based on the normalized optical carrier field complex envelope, and a safe compression mechanism is constructed to output a safe compressed output voltage and its peak value. Then, high-power shortwave transmission is performed by up-conversion according to the shortwave carrier frequency. On the one hand, there are often impedance changes, antenna mismatch, and current fluctuations caused by environmental changes between the remote power amplifier and the antenna port environment. Simply relying on hardware overcurrent protection will lead to frequent disconnection or severe clipping. Safe compression achieves gradual fallback and controlled compression through calculable compression amounts, suppressing overcurrent and abnormal peaks while preserving as much recoverable information structure as possible. On the other hand, the formation of the pre-driving voltage enables the normalized representation on the fiber side to be converted into a quantity that can directly drive the power amplifier at the remote end, reducing arbitrary scaling in intermediate links.

[0023] The receiver does not treat the received waveform as a black-box output for direct judgment. Instead, it uses key control quantities generated and transmittable by the transmitter (safe compression output peak value, memory span, peak-state anti-torque, and memory anti-torque) to perform inverse mapping recovery on the receiver's complex-valued baseband voltage, forming the service segment recovery result. This improves end-to-end recoverability: safe compression is a nonlinear transformation. If the receiver does not know the compression degree and calibration reference, recovery often relies on blind equalization or empirical inverse transformation, which can easily introduce amplitude mismatch and residual distortion in high-power, large dynamic range scenarios. This solution uses the safe compression output peak value as the key basis for amplitude calibration and inverse compression recovery, enabling the receiver to complete amplitude consistency before performing inverse transformation, reducing recovery uncertainty. At the same time, the logic for constructing memory span and memory correlation strength enables the receiver to perform consistent inverse processing on time-varying distortion caused by memory effects, avoiding the trailing residue caused by relying solely on the inverse transformation of instantaneous amplitude. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the process of the present invention.

[0025] Figure 2 This is a schematic diagram of the process for determining the memory span in this invention.

[0026] Figure 3 This is a schematic diagram of the process for constructing and averaging the transmitter-side memory intensity according to the present invention.

[0027] Figure 4 This is a schematic diagram of the process for extracting the remote equivalent state and transmitting back light intensity statistics according to the present invention.

[0028] Figure 5 This is a schematic diagram of the reverse mapping recovery process at the receiving end of the present invention. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Example, refer to Figure 1 A shortwave channel transceiver method based on fiber optic extension includes: The shortwave service signal to be transmitted is divided into calibration segment and service segment, a transmit / receive frame is established, the shortwave carrier frequency is recorded, and the memory span is obtained based on the conjugate autocorrelation amplitude of the calibration segment. Extract the root mean square value of the effective voltage of the service segment, combine it with the memory span to construct the transmit-side memory strength, and obtain the transmit-side memory average strength; The calibration segment is directly sent into the fiber optic remote link, and the equivalent voltage, equivalent current and return light intensity of the antenna port are collected synchronously at the remote end. The equivalent radiation resistance, safe current and return light intensity statistics are obtained. Based on the antenna port equivalent voltage, antenna port equivalent current, shortwave carrier frequency, safe current, and return light intensity statistics, peak-state deviation function and memory deviation function are established respectively, and peak-state deviation function value and memory deviation function value are generated. Based on the peak-state deviation function value, the root mean square value of the effective voltage of the service segment, the memory deviation function value, the average strength of the transmitter memory and the strength of the transmitter memory, the peak-state anti-torque, the memory anti-torque, and the anti-torque service segment are constructed. The optical carrier depth is obtained based on the anti-torsion service segment and the backhaul optical intensity statistics, and the normalized optical carrier field complex envelope of the optical fiber remote link is formed. At the far end, the far-end pre-drive voltage, safe compression output voltage and safe compression output peak are formed according to the normalized optical carrier field complex envelope, and high-power shortwave transmission is performed after up-conversion according to the shortwave carrier frequency. At the receiving end, the complex baseband voltage is inversely mapped and recovered based on the secure compressed output peak value, memory span, peak-state anti-torque, and memory anti-torque, thus forming the service segment recovery result.

[0031] The shortwave service signal is first divided into a calibration segment and a service segment. The carrier frequency is recorded within the same transmit / receive frame, and the memory span is extracted from the calibration segment. Then, the root mean square value of the effective voltage is extracted from the service segment, and the transmit-side memory intensity and its average value are constructed. Subsequently, the calibration segment is directly sent to the fiber optic remote link, and the equivalent voltage, equivalent current, and return light intensity of the antenna port are synchronously collected at the remote end. The equivalent radiation resistance, safe current, and return light intensity statistics are further obtained. Based on this, peak-state deviation and memory deviation are established and corresponding deviation values ​​are formed. Then, peak-state anti-torsion and memory anti-torsion are constructed based on these values, and an anti-torsion service segment is formed. Then, the optical carrier depth is obtained based on the anti-torsion service segment and the return light intensity statistics, and a normalized optical carrier field complex envelope is formed. At the remote end, the pre-driving voltage is formed by the complex envelope and safe compression is performed. After obtaining the safe compression output voltage and its peak value, the high-power shortwave transmission with up-conversion is completed. Finally, the receiver uses the safe compression output peak value, memory span, and two types of anti-torsion to perform inverse mapping recovery on the receiver complex baseband voltage to form the service segment recovery result. This comprehensive process addresses several key challenges in fiber optic deployment scenarios. These include difficulties in real-time monitoring of remote load status, potential impedance deviations and overcurrent risks at power amplifier and antenna ports, reduced recoverability due to the combined effects of peak distortion and memory effects in the service segment, and wasted dynamic range or saturation distortion caused by fixed fiber modulation depth configurations. By establishing a closed-loop system linking calibration sensing, deviation quantization, preprocessing compensation, adaptive modulation depth, secure compression protection, and receiver inverse transformation recovery, compensation and protection are no longer isolated. This reduces the probability of abnormal peak values ​​and overcurrent triggers while improving the recoverability and consistency of the service segment after high-power transmission at the remote end. Compared to common practices that only use fixed threshold limiting or single-point predistortion and lack joint driving from remote electrical parameters and return optical intensity, this solution completes state extraction and parameter updates within the same frame, reducing long-term mismatch caused by environmental changes and load drift.

[0032] Reference Figure 2 The process of dividing the shortwave service signal to be transmitted into a calibration segment and a service segment, establishing transmit / receive frames, recording the shortwave carrier frequency, and obtaining the memory span based on the conjugate autocorrelation amplitude of the calibration segment specifically includes: The shortwave service signal to be transmitted is divided into a calibration segment and a service segment, and the duration of the calibration segment, the duration of the service segment, and the shortwave carrier frequency are recorded. For each continuous delay, the effective duration obtained by subtracting the current continuous delay from the duration of the calibration segment is used as the integration interval. Within the integration interval corresponding to the effective duration obtained by subtracting the current continuous delay from the duration of the calibration segment, the complex equivalent baseband voltage of the calibration segment at the current moment is multiplied by the conjugate value of the complex equivalent baseband voltage of the calibration segment after the corresponding continuous delay, and integrated. Then, it is divided by the effective duration obtained by subtracting the current continuous delay from the duration of the calibration segment to form the conjugate autocorrelation amplitude of the calibration segment with respect to the current continuous delay. When the conjugate autocorrelation amplitude of the calibration segment at zero delay is greater than zero, within the range from zero to the duration of the calibration segment, the smallest delay that causes the conjugate autocorrelation amplitude of the calibration segment to first decay to no more than half of the conjugate autocorrelation amplitude at zero delay is selected as the memory span. When the conjugate autocorrelation amplitude of the calibration segment at zero delay is zero, or there is no delay that satisfies the semi-correlation decay condition, the duration of the calibration segment is taken as the memory span. After the memory span is acquired, the memory span will remain unchanged within the current transmit / receive frame.

[0033] The shortwave service signal to be transmitted is divided into calibration segments. With business segment The duration of the calibration segment is recorded as The duration of the business segment is recorded as The shortwave carrier frequency is denoted as ;in, For calibration segment at time The complex-valued equivalent baseband voltage; For the business segment at time The complex-valued equivalent baseband voltage; For continuous time points; The duration of the calibration segment; Duration of the business segment; It is a shortwave carrier frequency; Constructing a calibration segment regarding latency conjugate autocorrelation magnitude function Specifically: , ;in, For continuous time delay variables; For the calibration segment, the complex-valued equivalent baseband voltage at time... The conjugate value; when When, take the minimum that satisfies of As a span of memory Specifically: ;in, The autocorrelation amplitude of the calibration segment at zero delay; For memory span; Given the infimum function, under the current bounded closure criterion, select the minimum delay that satisfies the semi-correlation decay condition; when season ; When the conditions are met When it does not exist, let ; When memory span Once fixed, it will not change within the current frame.

[0034] Reference Figure 3 The extraction of the root mean square value of the effective voltage of the service segment, combined with the memory span to construct the transmit-side memory strength, and obtaining the transmit-side memory average strength specifically includes: Integrate the modulus-square voltage at each consecutive time point of the service segment, divide it by the duration of the service segment, and take the square root of the result to form the root mean square value of the effective voltage of the service segment. For each continuous time within a service segment, compare the current continuous time with the memory span, and take the smaller of the two values ​​as the upper limit of the transmitter-side memory integration corresponding to the current continuous time. For each continuous time within the service segment, within the interval from zero to the upper limit of the transmitter-side memory integration corresponding to the current continuous time, the square of the complex-valued equivalent baseband voltage modulus of the service segment at the backtracking time is weighted and integrated according to the weight that decays linearly with the backtracking delay, and then divided by the memory span to form the transmitter-side memory strength corresponding to the current continuous time. The transmit-side memory intensity corresponding to each consecutive time within the service segment is integrated and then divided by the duration of the service segment to form the average transmit-side memory intensity.

[0035] For business segment The root mean square value of the effective voltage is calculated as follows: ;in, This represents the root mean square value of the effective voltage of the service segment. For the business segment at time The square voltage of the modulus; By memory span Construct the upper limit function for integration, specifically as follows: , ;in, For the launch side at time The corresponding upper limit of memory integration; Construct a memory strength function on the business segment, specifically as follows: , ;in, For the launch side at time The strength of memory; For the business segment at time The complex-valued equivalent baseband voltage; The squared modulus voltage at the retrospective moment; The average memory strength is obtained by taking the average value of the business segments of the memory strength function, specifically as follows: ;in, This represents the average intensity of the transmitter-side memory.

[0036] Reference Figure 4 The process of directly sending the calibration segment into the fiber optic remote link, synchronously collecting the equivalent voltage, equivalent current, and return light intensity at the remote end, and obtaining the equivalent radiation resistance, safe current, and return light intensity statistics, specifically includes: The calibration segment is sent directly into the fiber optic remote link without applying anti-torsion mapping; Simultaneously collect the equivalent voltage, equivalent current, and remote return light intensity of the remote antenna port within the calibration range; When the integral of the square of the equivalent current at the antenna port within the calibration range is greater than zero, the conjugate values ​​of the equivalent voltage and the equivalent current at the antenna port are multiplied and integrated within the calibration range to obtain the real part of the integral result. The negative values ​​in the real part of the integral result are truncated to zero and then divided by the integral of the square of the equivalent current at the antenna port within the calibration range to form the equivalent radiation resistance. When the integral of the square of the modulus of the equivalent current at the antenna port within the calibration range is zero, the equivalent radiation resistance is recorded as zero. Integrate the equivalent current at the antenna port over the calibration period and divide it by the duration of the calibration period to form the average current of the calibration period. Integrate the square of the magnitude of the difference between the equivalent current at the antenna port and the average current in the calibration section within the calibration section, divide it by the duration of the calibration section, and add it to the average current in the calibration section to form the safety current. Within the calibration range, the maximum and minimum values ​​of the returned light intensity are calculated respectively. The maximum and minimum values ​​of the returned light intensity are added together and then divided by two to form the center value of the returned light intensity.

[0037] calibration segment Feeding into fiber optic remote links without applying anti-torsion mapping; The calibration segment is directly used as the calibration input without applying anti-torsion mapping. The equivalent voltage at the antenna port is synchronously acquired at the remote end within the calibration range. Antenna port equivalent current and backlight intensity ;in, For the remote antenna port at time The equivalent complex voltage sample value; For the remote antenna port at time The equivalent complex current sampling value; For remote backhaul optical path at time The non-negative real-valued light intensity sampled value; when At that time, the equivalent radiation resistance is calculated using the remote sampling results: ;in, Equivalent radiation resistance; The equivalent current of the antenna port at time t The conjugate value; To take the real part of the function; For positive part operations, the negative real part is truncated to zero; when season ; The average current of the calibration section is calculated as follows: ; Construct a safe current for ; The maximum return light intensity of the calibration section is calculated as follows: ; The minimum return light intensity of the calibration section is calculated to be [value missing]. ; The center value of the returned light intensity in the calibration section is calculated. .

[0038] Based on the antenna port equivalent voltage, antenna port equivalent current, shortwave carrier frequency, safe current, and return light intensity statistics, a peak-state deviation function and a memory deviation function are established respectively, and peak-state deviation function values ​​and memory deviation function values ​​are generated, specifically including: When the safe current is greater than zero and the equivalent radiation resistance is greater than zero, the instantaneous impedance deviation of the antenna port is formed by subtracting the product of the equivalent radiation resistance and the equivalent current of the antenna port from the equivalent voltage of the antenna port. The instantaneous impedance deviation of the antenna port is then divided by the product of the equivalent radiation resistance and the safe current to form the normalized impedance deviation. The square of the magnitude of the normalized impedance deviation is integrated within the calibration segment and divided by the duration of the calibration segment to form the first part of the peak-state deviation function. The portion of the equivalent current of the antenna port that exceeds the safe current is then truncated, the truncated result is divided by the safe current, squared, integrated within the calibration segment, and divided by the duration of the calibration segment to form the second part of the peak-state deviation function. The first part of the peak-state deviation function and the second part of the peak-state deviation function are added together to form the peak-state deviation function value. When the safe current is zero, the peak deviation function value is recorded as zero; When the equivalent radiation resistance is zero and the safe current is greater than zero, the part of the equivalent current at the antenna port that exceeds the safe current is truncated, the truncated result is divided by the safe current and squared, and then integrated within the calibration segment and divided by the duration of the calibration segment to form the peak deviation function value. When the safe current is greater than zero and the center value of the returned light intensity is greater than zero, calculate the first-order rate of change of the equivalent current at the antenna port with respect to continuous time, divide it by twice pi, the product of the shortwave carrier frequency and the safe current, square it, integrate it within the calibration segment, and divide it by the duration of the calibration segment to form the first part of the memory bias function; then, divide the difference between the returned light intensity and the center value of the returned light intensity by the center value of the returned light intensity, square it, integrate it within the calibration segment, and divide it by the duration of the calibration segment to form the second part of the memory bias function; add the first part of the memory bias function to the second part of the memory bias function to form the memory bias function value; When the safe current is greater than zero and the center value of the returned light intensity is equal to zero, only the first part of the memory deviation function based on the first-order rate of change of the equivalent current of the antenna port with respect to continuous time is retained to form the memory deviation function value; when the safe current is equal to zero and the center value of the returned light intensity is greater than zero, only the second part of the memory deviation function based on the swing of the returned light intensity relative to the center value of the returned light intensity is retained to form the memory deviation function value. When the safe current is zero and the center value of the returned light intensity is zero, the memory deviation function value is recorded as zero.

[0039] when and At that time, the peak-state deviation function is constructed using the impedance deviation of the far-end antenna port and the peak overflow, specifically as follows: ;in, This represents the peak deviation function value. This is a dimensionless normalized expression for the instantaneous impedance deviation at the antenna port; This refers to the relative overflow amount exceeding the safe current. when season ; when and season ; Execute steps S401 to S404 to construct a memory deviation function using the rate of change of the far-end current and the swing of the returned light intensity, specifically as follows: S401, when , season: ;in, This is the value of the memory bias function; The equivalent current at the antenna port with respect to continuous time The first derivative; This refers to the swing deviation of the returned light intensity relative to the center value; S402, when , season: ; S403, when , season: ; S404, when , season: .

[0040] The process of constructing peak-state anti-torque, memory anti-torque, and anti-torque service segment based on the peak-state deviation function value, the root mean square value of the effective voltage of the service segment, the memory deviation function value, the average strength of the transmitter-side memory, and the strength of the transmitter-side memory specifically includes: When the root mean square value of the effective voltage of the service segment is greater than zero, the peak-state deviation function value is divided by the square of the root mean square value of the effective voltage of the service segment to form the peak-state reverse torque; when the root mean square value of the effective voltage of the service segment is equal to zero, the peak-state reverse torque is recorded as zero. When the average strength of the transmitter-side memory is greater than zero, the memory deviation function value is divided by the average strength of the transmitter-side memory to form the memory anti-torque; when the average strength of the transmitter-side memory is equal to zero, the memory anti-torque is recorded as zero. When the root mean square value of the effective voltage of the service segment is greater than zero, the kurtosis term and the memory term are subtracted from the complex equivalent baseband voltage of the service segment in each continuous time. The kurtosis term is the product of the kurtosis reverse torque, the complex equivalent baseband voltage of the service segment, and the modulus square voltage of the service segment. The memory term is the product of the memory reverse torque, the transmit-side memory intensity of the corresponding continuous time, and the complex equivalent baseband voltage of the service segment. The reverse torque output voltage corresponding to each continuous time is formed, and the reverse torque service segment is composed of the reverse torque output voltage corresponding to each continuous time. When the root mean square value of the effective voltage of the service segment is equal to zero, the reverse torque output voltage corresponding to each continuous time is recorded as zero, and the reverse torque service segment is formed by the reverse torque output voltage corresponding to each continuous time.

[0041] when When using the kurtosis deviation function Energy scale of the service segment Determine the peak-state reverse torque Specifically: ; when season ; when At that time, the memory bias function is used. Average strength of memory in business segments Determine the memory reverse torque Specifically: ; when season ; Will , Substituting into the peak-state anti-torsion emission function, we obtain the service segment anti-torsion output, specifically: , ;in, For the business segment at time The reverse torque output voltage; when At that time, reverse torque output is taken .

[0042] The process of obtaining the optical carrier depth based on the anti-torsion service segment and backhaul optical intensity statistics, and forming the normalized optical carrier field complex envelope of the fiber optic remote link, specifically includes: Integrate the square of the magnitude of the reverse torque output voltage within the service segment, divide it by the duration of the service segment, and take the square root of the result to form the root mean square value of the reverse torque output. Calculate the peak value of the reverse torque output voltage within the service segment to form the reverse torque output peak value; When the peak value of the reverse twist output is greater than zero, divide twice the root mean square value of the reverse twist output by the sum of the peak value and the root mean square value of the reverse twist output to form the first proportional term; then divide the center value of the returned light intensity by the peak value of the reverse twist output to form the second proportional term; multiply the first proportional term and the second proportional term to form the optical carrying depth; when the peak value of the reverse twist output is equal to zero, the optical carrying depth is recorded as zero. When the peak value of the reverse torsion output is greater than zero, the reverse torsion output voltage corresponding to each consecutive time is divided by the peak value of the reverse torsion output, multiplied by the optical carrier depth, and one is added to the result to form the normalized optical carrier field complex envelope corresponding to each consecutive time; when the peak value of the reverse torsion output is equal to zero, the normalized optical carrier field complex envelope corresponding to each consecutive time is recorded as one.

[0043] Reverse torque output The root mean square value is calculated as follows: ;in, The output is the root mean square value for reverse twisting; Calculate the peak value of the reverse torque output as ; when and At that time, calculate the optical carrying depth. Specifically: ; when season ; when season ; when At that time, optical carrying depth was adopted. The normalized optical field complex envelope formed by the input fiber remote link is as follows: , ;in, For a moment Normalized optical field complex envelope; when season .

[0044] The process of forming a remote pre-drive voltage, a safe compressed output voltage, and a safe compressed output peak value based on the normalized optical carrier field complex envelope at the remote end, and then performing high-power shortwave transmission after up-conversion to the shortwave carrier frequency, specifically includes: When the optical carrier depth is greater than zero, the result of subtracting one from the normalized optical carrier field complex envelope is multiplied by the anti-torsion output peak value and then divided by the optical carrier depth to form the far-end pre-drive voltage; when the optical carrier depth is equal to zero, the far-end pre-drive voltage is recorded as zero. When the reverse torque output peak value is greater than zero, the safe current is greater than zero, the equivalent radiation resistance is greater than zero, and the minimum return light intensity is greater than zero, first, the result of subtracting the safe current from the equivalent radiation resistance is taken as a positive value. Then, the reverse torque output peak value is divided by the positive value of subtracting the safe current from the equivalent radiation resistance, and then divided by the product of the safe current and the square of the reverse torque output peak value to form the first part of the safe compression amount. Next, the difference between the maximum return light intensity and the minimum return light intensity is divided by the product of the minimum return light intensity and the square of the reverse torque output peak value to form the second part of the safe compression amount. The first part of the safe compression amount and the second part of the safe compression amount are added together to form the safe compression amount. When the reverse torque output peak value is greater than zero, the safe current is greater than zero, the equivalent radiation resistance is greater than zero, and the minimum returned light intensity is equal to zero, only the first part of the safe compression amount based on the equivalent radiation resistance, safe current, and reverse torque output peak value is retained to form the safe compression amount; when the reverse torque output peak value is greater than zero, the safe current is equal to zero, and the minimum returned light intensity is greater than zero, only the second part of the safe compression amount based on the maximum returned light intensity, minimum returned light intensity, and reverse torque output peak value is retained to form the safe compression amount; when the reverse torque output peak value is greater than zero, the safe current is greater than zero, When the equivalent radiation resistance is zero and the minimum return light intensity is greater than zero, only the second part of the safety compression amount formed by the maximum return light intensity, the minimum return light intensity, and the peak value of the reverse torque output is retained to form the safety compression amount; when the peak value of the reverse torque output is zero, the safety compression amount is recorded as zero; when the peak value of the reverse torque output is greater than zero, the safety current is zero, and the minimum return light intensity is zero, the safety compression amount is recorded as zero; when the peak value of the reverse torque output is greater than zero, the safety current is greater than zero, the equivalent radiation resistance is zero, and the minimum return light intensity is zero, the safety compression amount is recorded as zero. Divide the remote pre-drive voltage by the sum of the products of one and two times the safe compression amount and the square of the modulus of the remote pre-drive voltage to form the safe compression output voltage corresponding to each consecutive time. Calculate the peak value of the safe compression output voltage within the service segment to form the safe compression output peak value; The safe compressed output voltage is used as the final driving quantity for the high-power shortwave transmission at the far end, and after up-conversion according to the shortwave carrier frequency, it is sent to the power amplifier unit and the antenna unit.

[0045] when At this time, a remote pre-drive voltage is formed, specifically as follows: , ;in, For remote time The pre-driving voltage; when season ; Perform steps S701 to S707 to construct a secure compression volume. Specifically: S701, when , , , season: ; S702, when , , , season: ; S703, when , , season: ; S704, when , , , season: ; S705, when season ; S706, when , , season: ; S707, when , , , season: ; Safety compression amount Substituting into the secure compression function, we obtain the compressed output before actual launch, specifically: , ;in, For remote time Safe compression output voltage; Calculate the peak value of safe compression output. ; by As the final driving force for high-power shortwave transmission at the far end, and according to the carrier frequency After up-conversion, the signal is fed into the power amplifier unit and the antenna unit.

[0046] Reference Figure 5 The step of performing inverse mapping recovery on the receiver's complex baseband voltage based on the secure compression output peak value, memory span, peak-state anti-torque, and memory anti-torque to form the service segment recovery result specifically includes: Obtain the complex baseband voltage at each consecutive time point of the receiver; When the peak value of the secure compression output is greater than zero and the peak value of the complex baseband voltage at the receiving end is greater than zero, the peak value of the secure compression output is divided by the peak value of the complex baseband voltage at the receiving end, and then multiplied by the complex baseband voltage at the receiving end at each consecutive time point to form the equivalent received quantity after amplitude calibration for each consecutive time point; when the peak value of the secure compression output is equal to zero, the equivalent received quantity after amplitude calibration for each consecutive time point is recorded as zero; when the peak value of the complex baseband voltage at the receiving end is equal to zero, the equivalent received quantity after amplitude calibration for each consecutive time point is recorded as zero. Under the condition that the product of the double safety compression and the square of the equivalent received quantity modulus after amplitude calibration is less than one, the equivalent received quantity after amplitude calibration is divided by one and the product of the double safety compression and the square of the equivalent received quantity modulus after amplitude calibration is subtracted to form the compression inverse recovery pre-recovery quantity corresponding to each continuous time. For each continuous time within a service segment, compare the current continuous time with the memory span, and take the smaller of the two values ​​to form the upper limit of the receiver's memory integral corresponding to the current continuous time. For each continuous time within the service segment, within the interval from zero to the upper limit of the receiver memory integration corresponding to the current continuous time, the square of the modulus of the compressed inverse recovery pre-recovery amount at the backtracking time is weighted and integrated according to the weight that decays linearly with the backtracking delay, and then divided by the memory span to form the receiver memory intensity corresponding to the current continuous time. Using the compressed inverse recovery pre-recovery amount as the numerator, and the sum of the product of the first-order reverse torque and the square of the modulus of the compressed inverse recovery pre-recovery amount, and the product of the memory reverse torque and the received memory intensity as the denominator, the calculation is performed for each continuous time of the service segment to form the service segment recovery result.

[0047] The receiving end at time The obtained complex baseband voltage is denoted as ; when and At that time, the equivalent received quantity after amplitude calibration is calculated as follows: , ;in, For the receiving end at time The equivalent received amount after amplitude calibration; when season ; when season ; when At that time, the pre-recovery amount is calculated according to the safe compression inverse recovery function, specifically as follows: , ;in, For the receiving end at time The compression inverse recovery pre-recovery amount; The upper limit function for the receiver integration is constructed as follows: , ;in, For the receiving side at time The upper limit of memory integration; Construct a receive memory strength function on the pre-recovery quantity, specifically as follows: , ;in, For the receiving side at time The strength of memory; use , The business recovery was performed, and the recovery result was as follows: , ;in, For the business segment at time The recovery results.

[0048] This embodiment also provides a system for a shortwave channel transceiver method based on fiber optic extension, including: Transceiver frame establishment and memory span processing module: Divides the shortwave service signal to be transmitted into calibration segment and service segment, records the shortwave carrier frequency, and obtains the memory span based on the conjugate autocorrelation amplitude of the calibration segment; Service segment effective voltage root mean square value and transmitter side memory intensity extraction module: extracts the effective voltage root mean square value of the service segment, constructs the transmitter side memory intensity, and obtains the transmitter side memory average intensity; Remote equivalent state extraction module: Performs fiber optic transmission for calibration section, and collects antenna port equivalent voltage, antenna port equivalent current and return light intensity at the remote end to obtain equivalent radiation resistance, safe current and return light intensity statistics; Peak-to-peak deviation function and memory deviation function establishment module: Based on the antenna port equivalent voltage, antenna port equivalent current, shortwave carrier frequency, safe current and return light intensity statistics, the peak-to-peak deviation function and memory deviation function are established, and the peak-to-peak deviation function value and memory deviation function value are generated; Anti-torsion service segment formation module: Based on the peak deviation function value, memory deviation function value, root mean square value of effective voltage of service segment, average strength of transmitter memory and strength of transmitter memory, the peak anti-torsion amount, memory anti-torsion amount and anti-torsion service segment are obtained; Optical carrier depth and normalized optical carrier field complex envelope formation module: Based on the anti-torsion service segment and backhaul light intensity statistics, the optical carrier depth is obtained and the normalized optical carrier field complex envelope is formed. Remote transmission and secure compression module: Based on the normalized optical carrier field complex envelope, it forms the remote pre-drive voltage, secure compression output voltage and secure compression output peak value, and performs high-power shortwave transmission after up-conversion to the shortwave carrier frequency; Receiver-end inverse mapping recovery module: Based on the secure compression output peak value, memory span, peak-state anti-torque, and memory anti-torque, it performs inverse mapping recovery on the receiver-end complex baseband voltage to form the service segment recovery result.

[0049] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, 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 process, method, article, or apparatus.

[0050] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A shortwave channel transceiver method based on extended optical fiber, characterized in that, include: The shortwave service signal to be transmitted is divided into calibration segment and service segment, a transmit / receive frame is established, the shortwave carrier frequency is recorded, and the memory span is obtained based on the conjugate autocorrelation amplitude of the calibration segment. Extract the root mean square value of the effective voltage of the service segment, combine it with the memory span to construct the transmit-side memory strength, and obtain the transmit-side memory average strength; The calibration segment is directly sent into the fiber optic remote link, and the equivalent voltage, equivalent current and return light intensity of the antenna port are collected synchronously at the remote end. The equivalent radiation resistance, safe current and return light intensity statistics are obtained. Based on the antenna port equivalent voltage, antenna port equivalent current, shortwave carrier frequency, safe current, and return light intensity statistics, peak-state deviation function and memory deviation function are established respectively, and peak-state deviation function value and memory deviation function value are generated. Based on the peak-state deviation function value, the root mean square value of the effective voltage of the service segment, the memory deviation function value, the average strength of the transmitter memory and the strength of the transmitter memory, the peak-state anti-torque, the memory anti-torque, and the anti-torque service segment are constructed. The optical carrier depth is obtained based on the anti-torsion service segment and the backhaul optical intensity statistics, and the normalized optical carrier field complex envelope of the optical fiber remote link is formed. At the far end, the far-end pre-drive voltage, safe compression output voltage and safe compression output peak are formed according to the normalized optical carrier field complex envelope, and high-power shortwave transmission is performed after up-conversion according to the shortwave carrier frequency. At the receiving end, the complex baseband voltage is inversely mapped and recovered based on the secure compressed output peak value, memory span, peak-state anti-torque, and memory anti-torque, thus forming the service segment recovery result.

2. The method for shortwave channel transceiver based on fiber optic extension according to claim 1, characterized in that, The process of dividing the shortwave service signal to be transmitted into a calibration segment and a service segment, establishing transmit / receive frames, recording the shortwave carrier frequency, and obtaining the memory span based on the conjugate autocorrelation amplitude of the calibration segment specifically includes: The shortwave service signal to be transmitted is divided into a calibration segment and a service segment, and the duration of the calibration segment, the duration of the service segment, and the shortwave carrier frequency are recorded. For each continuous delay, the effective duration obtained by subtracting the current continuous delay from the duration of the calibration segment is used as the integration interval. Within the integration interval corresponding to the effective duration obtained by subtracting the current continuous delay from the duration of the calibration segment, the complex equivalent baseband voltage of the calibration segment at the current moment is multiplied by the conjugate value of the complex equivalent baseband voltage of the calibration segment after the corresponding continuous delay, and integrated. Then, it is divided by the effective duration obtained by subtracting the current continuous delay from the duration of the calibration segment to form the conjugate autocorrelation amplitude of the calibration segment with respect to the current continuous delay. When the conjugate autocorrelation amplitude of the calibration segment at zero delay is greater than zero, within the range from zero to the duration of the calibration segment, the smallest delay that causes the conjugate autocorrelation amplitude of the calibration segment to first decay to no more than half of the conjugate autocorrelation amplitude at zero delay is selected as the memory span. When the conjugate autocorrelation amplitude of the calibration segment at zero delay is zero, or there is no delay that satisfies the semi-correlation decay condition, the duration of the calibration segment is taken as the memory span. After the memory span is acquired, the memory span will remain unchanged within the current transmit / receive frame.

3. The method for shortwave channel transceiver based on fiber optic extension according to claim 2, characterized in that, The extraction of the root mean square value of the effective voltage of the service segment, combined with the memory span to construct the transmit-side memory strength, and obtaining the transmit-side memory average strength, specifically includes: Integrate the modulus-square voltage at each consecutive time point of the service segment, divide it by the duration of the service segment, and take the square root of the result to form the root mean square value of the effective voltage of the service segment. For each continuous time within a service segment, compare the current continuous time with the memory span, and take the smaller of the two values ​​as the upper limit of the transmitter-side memory integration corresponding to the current continuous time. For each continuous time within the service segment, within the interval from zero to the upper limit of the transmitter-side memory integration corresponding to the current continuous time, the square of the complex-valued equivalent baseband voltage modulus of the service segment at the backtracking time is weighted and integrated according to the weight that decays linearly with the backtracking delay, and then divided by the memory span to form the transmitter-side memory strength corresponding to the current continuous time. The transmit-side memory intensity corresponding to each consecutive time within the service segment is integrated and then divided by the duration of the service segment to form the average transmit-side memory intensity.

4. The method for shortwave channel transceiver based on fiber optic extension according to claim 3, characterized in that, The calibration segment is directly fed into the fiber optic remote link, and the equivalent voltage, equivalent current, and return light intensity of the antenna port are synchronously collected at the remote end. The equivalent radiation resistance, safe current, and return light intensity statistics are obtained, specifically including: The calibration segment is sent directly into the fiber optic remote link without applying anti-torsion mapping; Simultaneously collect the equivalent voltage, equivalent current, and remote return light intensity of the remote antenna port within the calibration range; When the integral of the square of the equivalent current at the antenna port within the calibration range is greater than zero, the conjugate values ​​of the equivalent voltage and the equivalent current at the antenna port are multiplied and integrated within the calibration range to obtain the real part of the integral result. The negative values ​​in the real part of the integral result are truncated to zero and then divided by the integral of the square of the equivalent current at the antenna port within the calibration range to form the equivalent radiation resistance. When the integral of the square of the modulus of the equivalent current at the antenna port within the calibration range is zero, the equivalent radiation resistance is recorded as zero. Integrate the equivalent current at the antenna port over the calibration period and divide it by the duration of the calibration period to form the average current of the calibration period. Integrate the square of the magnitude of the difference between the equivalent current at the antenna port and the average current in the calibration section within the calibration section, divide it by the duration of the calibration section, and add it to the average current in the calibration section to form the safety current. Within the calibration range, the maximum and minimum values ​​of the returned light intensity are calculated respectively. The maximum and minimum values ​​of the returned light intensity are added together and then divided by two to form the center value of the returned light intensity.

5. A shortwave channel transceiver method based on fiber optic extension according to claim 4, characterized in that, Based on the antenna port equivalent voltage, antenna port equivalent current, shortwave carrier frequency, safe current, and return light intensity statistics, a peak-state deviation function and a memory deviation function are established respectively, and peak-state deviation function values ​​and memory deviation function values ​​are generated, specifically including: When the safe current is greater than zero and the equivalent radiation resistance is greater than zero, the instantaneous impedance deviation of the antenna port is formed by subtracting the product of the equivalent radiation resistance and the equivalent current of the antenna port from the equivalent voltage of the antenna port. The instantaneous impedance deviation of the antenna port is then divided by the product of the equivalent radiation resistance and the safe current to form the normalized impedance deviation. The square of the magnitude of the normalized impedance deviation is integrated within the calibration segment and divided by the duration of the calibration segment to form the first part of the peak-state deviation function. The portion of the equivalent current of the antenna port that exceeds the safe current is then truncated, the truncated result is divided by the safe current, squared, integrated within the calibration segment, and divided by the duration of the calibration segment to form the second part of the peak-state deviation function. The first part of the peak-state deviation function and the second part of the peak-state deviation function are added together to form the peak-state deviation function value. When the safe current is zero, the peak deviation function value is recorded as zero; When the equivalent radiation resistance is zero and the safe current is greater than zero, the part of the equivalent current at the antenna port that exceeds the safe current is truncated, the truncated result is divided by the safe current and squared, and then integrated within the calibration segment and divided by the duration of the calibration segment to form the peak deviation function value. When the safe current is greater than zero and the center value of the returned light intensity is greater than zero, calculate the first-order rate of change of the equivalent current at the antenna port with respect to continuous time, divide it by twice pi, the product of the shortwave carrier frequency and the safe current, square it, integrate it within the calibration segment, and divide it by the duration of the calibration segment to form the first part of the memory bias function; then, divide the difference between the returned light intensity and the center value of the returned light intensity by the center value of the returned light intensity, square it, integrate it within the calibration segment, and divide it by the duration of the calibration segment to form the second part of the memory bias function; add the first part of the memory bias function to the second part of the memory bias function to form the memory bias function value; When the safe current is greater than zero and the center value of the returned light intensity is equal to zero, only the first part of the memory deviation function based on the first-order rate of change of the equivalent current of the antenna port with respect to continuous time is retained to form the memory deviation function value; when the safe current is equal to zero and the center value of the returned light intensity is greater than zero, only the second part of the memory deviation function based on the swing of the returned light intensity relative to the center value of the returned light intensity is retained to form the memory deviation function value. When the safe current is zero and the center value of the returned light intensity is zero, the memory deviation function value is recorded as zero.

6. A shortwave channel transceiver method based on fiber optic extension according to claim 5, characterized in that, The process of constructing peak-state anti-torque, memory anti-torque, and anti-torque service segment based on the peak-state deviation function value, the root mean square value of the effective voltage of the service segment, the memory deviation function value, the average strength of the transmitter-side memory, and the strength of the transmitter-side memory specifically includes: When the root mean square value of the effective voltage of the service segment is greater than zero, the peak-state deviation function value is divided by the square of the root mean square value of the effective voltage of the service segment to form the peak-state reverse torque; when the root mean square value of the effective voltage of the service segment is equal to zero, the peak-state reverse torque is recorded as zero. When the average strength of the transmitter-side memory is greater than zero, the memory deviation function value is divided by the average strength of the transmitter-side memory to form the memory anti-torque; when the average strength of the transmitter-side memory is equal to zero, the memory anti-torque is recorded as zero. When the root mean square value of the effective voltage of the service segment is greater than zero, the kurtosis term and the memory term are subtracted from the complex equivalent baseband voltage of the service segment in each continuous time. The kurtosis term is the product of the kurtosis reverse torque, the complex equivalent baseband voltage of the service segment, and the modulus square voltage of the service segment. The memory term is the product of the memory reverse torque, the transmit-side memory intensity of the corresponding continuous time, and the complex equivalent baseband voltage of the service segment. The reverse torque output voltage corresponding to each continuous time is formed, and the reverse torque service segment is composed of the reverse torque output voltage corresponding to each continuous time. When the root mean square value of the effective voltage of the service segment is equal to zero, the reverse torque output voltage corresponding to each continuous time is recorded as zero, and the reverse torque service segment is formed by the reverse torque output voltage corresponding to each continuous time.

7. A shortwave channel transceiver method based on fiber optic extension according to claim 6, characterized in that, The process of obtaining the optical carrier depth based on the anti-torsion service segment and backhaul optical intensity statistics, and forming the normalized optical carrier field complex envelope of the fiber optic remote link, specifically includes: Integrate the square of the magnitude of the reverse torque output voltage within the service segment, divide it by the duration of the service segment, and take the square root of the result to form the root mean square value of the reverse torque output. Calculate the peak value of the reverse torque output voltage within the service segment to form the reverse torque output peak value; When the peak value of the reverse twist output is greater than zero, divide twice the root mean square value of the reverse twist output by the sum of the peak value and the root mean square value of the reverse twist output to form the first proportional term; then divide the center value of the returned light intensity by the peak value of the reverse twist output to form the second proportional term; multiply the first proportional term and the second proportional term to form the optical carrying depth; when the peak value of the reverse twist output is equal to zero, the optical carrying depth is recorded as zero. When the peak value of the reverse torsion output is greater than zero, the reverse torsion output voltage corresponding to each consecutive time is divided by the peak value of the reverse torsion output, multiplied by the optical carrier depth, and one is added to the result to form the normalized optical carrier field complex envelope corresponding to each consecutive time; when the peak value of the reverse torsion output is equal to zero, the normalized optical carrier field complex envelope corresponding to each consecutive time is recorded as one.

8. A shortwave channel transceiver method based on fiber optic extension according to claim 7, characterized in that, The process of forming a remote pre-drive voltage, a safe compressed output voltage, and a safe compressed output peak value based on the normalized optical carrier field complex envelope at the remote end, and then performing high-power shortwave transmission after up-conversion to the shortwave carrier frequency, specifically includes: When the optical carrier depth is greater than zero, the result of subtracting one from the normalized optical carrier field complex envelope is multiplied by the anti-torsion output peak value and then divided by the optical carrier depth to form the far-end pre-drive voltage; when the optical carrier depth is equal to zero, the far-end pre-drive voltage is recorded as zero. When the reverse torque output peak value is greater than zero, the safe current is greater than zero, the equivalent radiation resistance is greater than zero, and the minimum return light intensity is greater than zero, first, the result of subtracting the safe current from the equivalent radiation resistance is taken as a positive value. Then, the reverse torque output peak value is divided by the positive value of subtracting the safe current from the equivalent radiation resistance, and then divided by the product of the safe current and the square of the reverse torque output peak value to form the first part of the safe compression amount. Next, the difference between the maximum return light intensity and the minimum return light intensity is divided by the product of the minimum return light intensity and the square of the reverse torque output peak value to form the second part of the safe compression amount. The first part of the safe compression amount and the second part of the safe compression amount are added together to form the safe compression amount. When the reverse torque output peak value is greater than zero, the safe current is greater than zero, the equivalent radiation resistance is greater than zero, and the minimum returned light intensity is equal to zero, only the first part of the safe compression amount based on the equivalent radiation resistance, safe current, and reverse torque output peak value is retained to form the safe compression amount; when the reverse torque output peak value is greater than zero, the safe current is equal to zero, and the minimum returned light intensity is greater than zero, only the second part of the safe compression amount based on the maximum returned light intensity, minimum returned light intensity, and reverse torque output peak value is retained to form the safe compression amount; when the reverse torque output peak value is greater than zero, the safe current is greater than zero, When the equivalent radiation resistance is zero and the minimum return light intensity is greater than zero, only the second part of the safety compression amount formed by the maximum return light intensity, the minimum return light intensity, and the peak value of the reverse torque output is retained to form the safety compression amount; when the peak value of the reverse torque output is zero, the safety compression amount is recorded as zero; when the peak value of the reverse torque output is greater than zero, the safety current is zero, and the minimum return light intensity is zero, the safety compression amount is recorded as zero; when the peak value of the reverse torque output is greater than zero, the safety current is greater than zero, the equivalent radiation resistance is zero, and the minimum return light intensity is zero, the safety compression amount is recorded as zero. Divide the remote pre-drive voltage by the sum of the products of one and two times the safe compression amount and the square of the modulus of the remote pre-drive voltage to form the safe compression output voltage corresponding to each consecutive time. Calculate the peak value of the safe compression output voltage within the service segment to form the safe compression output peak value; The safe compressed output voltage is used as the final driving quantity for the high-power shortwave transmission at the far end, and after up-conversion according to the shortwave carrier frequency, it is sent to the power amplifier unit and the antenna unit.

9. A shortwave channel transceiver method based on fiber optic extension according to claim 8, characterized in that, The process of performing inverse mapping recovery on the receiver's complex baseband voltage based on the secure compression output peak value, memory span, peak-state anti-torque, and memory anti-torque to form the service segment recovery result specifically includes: Obtain the complex baseband voltage at each consecutive time point of the receiver; When the peak value of the secure compression output is greater than zero and the peak value of the complex baseband voltage at the receiving end is greater than zero, the peak value of the secure compression output is divided by the peak value of the complex baseband voltage at the receiving end, and then multiplied by the complex baseband voltage at the receiving end at each consecutive time point to form the equivalent received quantity after amplitude calibration for each consecutive time point; when the peak value of the secure compression output is equal to zero, the equivalent received quantity after amplitude calibration for each consecutive time point is recorded as zero; when the peak value of the complex baseband voltage at the receiving end is equal to zero, the equivalent received quantity after amplitude calibration for each consecutive time point is recorded as zero. Under the condition that the product of the double safety compression and the square of the equivalent received quantity modulus after amplitude calibration is less than one, the equivalent received quantity after amplitude calibration is divided by one and the product of the double safety compression and the square of the equivalent received quantity modulus after amplitude calibration is subtracted to form the compression inverse recovery pre-recovery quantity corresponding to each continuous time. For each continuous time within a service segment, compare the current continuous time with the memory span, and take the smaller of the two values ​​to form the upper limit of the receiver's memory integral corresponding to the current continuous time. For each continuous time within the service segment, within the interval from zero to the upper limit of the receiver memory integration corresponding to the current continuous time, the square of the modulus of the compressed inverse recovery pre-recovery amount at the backtracking time is weighted and integrated according to the weight that decays linearly with the backtracking delay, and then divided by the memory span to form the receiver memory intensity corresponding to the current continuous time. Using the compressed inverse recovery pre-recovery amount as the numerator, and the sum of the product of the first-order reverse torque and the square of the modulus of the compressed inverse recovery pre-recovery amount, and the product of the memory reverse torque and the received memory intensity as the denominator, the calculation is performed for each continuous time of the service segment to form the service segment recovery result.

10. A system employing the shortwave channel transceiver method based on fiber optic extension as described in claim 9, characterized in that, include: Transceiver frame establishment and memory span processing module: Divides the shortwave service signal to be transmitted into calibration segment and service segment, records the shortwave carrier frequency, and obtains the memory span based on the conjugate autocorrelation amplitude of the calibration segment; Service segment effective voltage root mean square value and transmitter side memory intensity extraction module: extracts the effective voltage root mean square value of the service segment, constructs the transmitter side memory intensity, and obtains the transmitter side memory average intensity; Remote equivalent state extraction module: Performs fiber optic transmission for calibration section, and collects antenna port equivalent voltage, antenna port equivalent current and return light intensity at the remote end to obtain equivalent radiation resistance, safe current and return light intensity statistics; Peak-to-peak deviation function and memory deviation function establishment module: Based on the antenna port equivalent voltage, antenna port equivalent current, shortwave carrier frequency, safe current and return light intensity statistics, the peak-to-peak deviation function and memory deviation function are established, and the peak-to-peak deviation function value and memory deviation function value are generated; Anti-torsion service segment formation module: Based on the peak deviation function value, memory deviation function value, root mean square value of effective voltage of service segment, average strength of transmitter memory and strength of transmitter memory, the peak anti-torsion amount, memory anti-torsion amount and anti-torsion service segment are obtained; Optical carrier depth and normalized optical carrier field complex envelope formation module: Based on the anti-torsion service segment and backhaul light intensity statistics, the optical carrier depth is obtained and the normalized optical carrier field complex envelope is formed. Remote transmission and secure compression module: Based on the normalized optical carrier field complex envelope, it forms the remote pre-drive voltage, secure compression output voltage and secure compression output peak value, and performs high-power shortwave transmission after up-conversion to the shortwave carrier frequency; Receiver-end inverse mapping recovery module: Based on the secure compression output peak value, memory span, peak-state anti-torque, and memory anti-torque, it performs inverse mapping recovery on the receiver-end complex baseband voltage to form the service segment recovery result.

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