A high dynamic receiving device based on two-dimensional dynamic reconstruction

Abstract

The application discloses a high dynamic receiving device based on two-dimensional dynamic reconstruction, and belongs to the technical field of high-speed wireless communication. The device is composed of a low-noise amplifier, a frequency converter, an amplification and filtering unit, an A / D sampler, a baseband preprocessor, a synchronization extractor, a high dynamic receiving signal reconstruction unit, a transfer function two-dimensional corrector, a high-efficiency decoding unit and a service interface unit. According to the high dynamic receiving signal reconstruction technology and the time delay-frequency shift domain two-dimensional correction technology, the application improves the anti-interference ability, the anti-frequency offset ability and the anti-multipath time delay ability of the system without increasing the signal bandwidth, and is especially suitable for high-speed communication of wireless channels such as microwave channels and scattering channels.

Description

Technical Field

[0001] This invention discloses a high dynamic range receiving device based on two-dimensional dynamic reconstruction, belonging to the field of high-speed wireless communication technology. Background Technology

[0002] In high-speed wireless communication systems, multipath delays occur due to signals propagating along different paths. When the delay difference approaches the reciprocal of the transmission signal bandwidth, intersymbol interference (ISI) occurs. Adaptive equalization is typically used to remove ISI; however, traditional adaptive equalizers have weak frequency offset resistance and can only address this by reducing the data rate or improving clock source stability. Furthermore, minimizing the impact of external interference during signal transmission is also a problem that needs to be solved. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the above-mentioned background technology and provide a high dynamic receiving device based on two-dimensional dynamic reconstruction. It uses high dynamic receiving signal reconstruction technology to perform interference separation and adaptive high dynamic compensation on the signal; and uses time delay-frequency shift domain two-dimensional correction technology to correct the parameters of the transmission function, thereby improving the system's anti-interference, anti-multipath delay and anti-frequency offset capabilities, and improving the reliability of transmission.

[0004] The objective of this invention is achieved as follows:

[0005] A high dynamic range receiving device based on two-dimensional dynamic reconstruction includes a low noise amplifier 1, a frequency converter 2, an amplification and filtering unit 3, an A / D sampler 4, a baseband preprocessor 5, a synchronization extractor 6, a high efficiency decoding unit 9, a service interface unit 10, and a power supply 11. The device is characterized by further including a high dynamic range received signal reconstruction unit 7 and a two-dimensional transfer function corrector 8.

[0006] Low-noise amplifier 1 amplifies the received small radio frequency signal and filters out out-of-band noise interference, and sends the amplified and filtered signal to inverter 2;

[0007] Inverter 2 shifts the signal from the radio frequency to the intermediate frequency and sends the intermediate frequency signal to the amplification and filtering unit 3;

[0008] The amplification and filtering unit 3 amplifies the intermediate frequency signal and filters out out-of-band spurious signals and interference, and sends the amplified and filtered intermediate frequency signal to the A / D sampler 4;

[0009] A / D sampler 4 performs analog-to-digital conversion and sends the converted digital signal to baseband preprocessor 5;

[0010] The baseband preprocessor 5 performs digital down-conversion and filtering, and sends the signal to the synchronization extractor 6 and the high dynamic range received signal reconstruction unit 7 for processing;

[0011] Synchronization extractor 6 extracts synchronization information and sends the synchronization information to high dynamic range received signal reconstruction unit 7 and transfer function two-dimensional corrector 8 to provide synchronization reference;

[0012] The high dynamic range received signal reconstruction unit 7 reconstructs, de-interferences, and amplifies the baseband preprocessed signal according to the synchronization information, and obtains channel parameters and mode information. The processed signal and the obtained channel parameters and mode information are sent to the two-dimensional transfer function corrector 8, and the mode information is sent to the high efficiency decoding unit 9.

[0013] The two-dimensional transfer function corrector 8 corrects and compensates for channel distortion in the reconstructed and amplified signal based on synchronization information and channel parameters, obtains demodulation soft values, and sends them to the high-efficiency decoding unit 9 for decoding.

[0014] The high-efficiency decoding unit 9 performs high-efficiency decoding based on the demodulation soft value and mode information to obtain the decoded codeword, which is then sent to the service interface unit 10 for service demultiplexing processing to obtain service information.

[0015] The high dynamic range received signal reconstruction unit 7 includes a pattern recognizer 12, a power spectrum feature estimator 13, a high dynamic range feature value analysis unit 14, an interference signal separator 15, an adaptive dynamic gain allocator 16, a signal reconstruction and interference cancellation unit 17, and a filtering unit 18. The baseband signal and synchronization information output by the baseband preprocessor 5 are sent to the pattern recognizer 12 for signal pattern information recognition, and then sent to the adaptive dynamic gain allocator 16, the filtering unit 18, and the high-efficiency decoding unit 9. The power spectrum feature estimator 13 obtains the power spectrum of the baseband signal and estimates its feature values, and sends the obtained power spectrum feature values ​​to the high dynamic range feature value analysis unit. Unit 14 performs high dynamic processing on the feature values, analyzes and purifies the feature values ​​of the useful signal under strong interference and sends them to the adaptive dynamic gain divider 16, and sends the feature values ​​of the interference signal to the interference signal separator 15; the interference signal separator 15 separates the interference in the signal according to the interference feature values; the adaptive dynamic gain divider 16 adaptively and dynamically allocates the gain of the feature values ​​of the useful signal to amplify it to a suitable level; the signal reconstruction and interference cancellation unit 17 reconstructs the received signal according to the feature values ​​of the useful signal from the interference signal separator 15 and the adaptive dynamic gain divider 16, and sends it to the filtering unit 18 to further filter out the interference before sending it to the two-dimensional transfer function corrector 8.

[0016] The two-dimensional transfer function corrector 8 includes a feature signal locator 19, a multi-rate interpolator 20, a transfer function time-domain matcher 21, a transfer function time-domain corrector 22, a transfer function delay-frequency shift estimation and matching canceller 23, a transfer function multi-rate reconstruction and corrector 24, and a superimposed deconvolutioner 25. The feature signal locator 19 locates the feature signals in the reconstructed received signal output by the high dynamic range received signal reconstruction unit 7 based on the synchronization information of the synchronization extractor 6, outputs it to the transfer function time-domain matcher 21, performs matching, and then sends it to the transfer function time-domain corrector 22 for correction and the transfer function delay-frequency shift estimation and matching canceller 23. The transfer function time-domain corrector 22 performs the correction... The signal is then sent to the transfer function time-delay-frequency shift domain estimator and matching canceller 23, where the transfer function is estimated and matching canceller is completed in the time-delay-frequency shift domain; the transfer function multi-sampling rate reconstruction and correction unit 24 performs multi-sampling rate interpolation on the transfer function and sends it to the superimposed deconvolution unit 25; at the same time, the multi-sampling rate interpolator 20 performs multi-sampling rate interpolation on the reconstructed received signal output by the high dynamic range received signal reconstruction unit 7 according to the synchronization information of the synchronization extractor 6, and sends the interpolated reconstructed signal to the superimposed deconvolution unit 25; the superimposed deconvolution unit 25 performs deconvolution processing on the signals from the multi-sampling rate interpolator and the transfer function multi-sampling rate reconstruction and correction unit 24 to obtain the demodulated soft value, and sends the soft value to the high-efficiency decoding unit 9.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] 1. This invention employs a high dynamic range received signal reconstruction unit 7, which uses high dynamic range received signal reconstruction technology to adaptively perform high dynamic compensation on the signal and separate the interference signal by using the characteristic values ​​of the signal and the interference, thereby enhancing the anti-interference capability of the system and improving the reliability of the system.

[0019] 2. This invention employs a two-dimensional transfer function corrector 8, which uses time delay-frequency shift domain two-dimensional correction technology to perform parameter correction processing on the transfer function, thereby enhancing its ability to resist multipath delay. It can resist delays of more than ten symbols and frequency offset dispersion of one-thousandth of the symbol rate.

[0020] 3. The circuit components of this invention are made using large-scale field-programmable devices, so the operating parameters can be flexibly modified by configuring different programs, which greatly simplifies the structure of the equipment and significantly reduces the cost. Attached Figure Description

[0021] Figure 1 This is a block diagram of the electrical principle of a high dynamic receiving device based on two-dimensional dynamic reconstruction according to the present invention.

[0022] Figure 2 This is an electrical schematic diagram of an embodiment of the high dynamic range received signal reconstruction unit 7 of the present invention.

[0023] Figure 3 This is the electrical schematic diagram of an 8th embodiment of the two-dimensional transfer function corrector of the present invention. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings.

[0025] Reference Figures 1 to 3 The present invention comprises a low-noise amplifier 1, a frequency converter 2, an amplification and filtering unit 3, an A / D sampler 4, a baseband preprocessor 5, a synchronization extractor 6, a high dynamic range received signal reconstruction unit 7, a two-dimensional transfer function corrector 8, a high-efficiency decoding unit 9, a service interface unit 10, and a power supply 11. Figure 1 This is a block diagram of the electrical principle of a high dynamic range receiving device based on two-dimensional dynamic reconstruction according to the present invention. The embodiments are as follows: Figure 1 Connecting lines.

[0026] External signal A is amplified and filtered out for out-of-band noise interference by low-noise amplifier 1, and then sent to inverter 2. Inverter 2 shifts the signal from radio frequency to intermediate frequency (IF), and sends the IF signal to amplification and filtering unit 3. Amplification and filtering unit 3 amplifies the IF signal and filters out out-of-band spurious signals and interference, and then sends the amplified and filtered IF signal to A / D sampler 4. A / D sampler 4 performs analog-to-digital conversion and sends the converted digital signal to baseband preprocessor 5. Baseband preprocessor 5 performs digital down-conversion and filtering, and then sends the signal to synchronization extractor 6 and high dynamic range receiver signal reconstruction unit 7 for processing. Synchronization extractor 6 extracts synchronization information and sends the synchronization information to high dynamic range receiver signal reconstruction unit 7. The 7 and 8 two-dimensional transfer function correctors provide a synchronization reference; the high dynamic range received signal reconstruction unit 7 processes the baseband preprocessed signal according to the synchronization information to obtain channel parameters and mode information, and sends the processed signal and the obtained channel parameters and mode information to the 8 two-dimensional transfer function corrector, while sending the mode information to the high-efficiency decoding unit 9; the 8 two-dimensional transfer function corrector corrects and compensates for channel distortion of the reconstructed and amplified signal according to the synchronization information and channel parameters, obtains demodulation soft values, and sends them to the high-efficiency decoding unit 9 for decoding; the high-efficiency decoding unit 9 performs high-efficiency decoding according to the demodulation soft values ​​and mode information to obtain the decoded codewords, which are sent to the service interface unit 10 for service demultiplexing processing, and the obtained service information is sent to the output port B. In this embodiment, the low-noise amplifier 1 is made using the SG44050CN1R2BD12 from Nanjing SEG Microelectronics Co., Ltd., the frequency converter 2 is made using the TSFHTRC-C from Shijiazhuang Aodong Electronics Technology Co., Ltd., and the amplification and filtering unit 3 is made using the commercially available XN402 integrated amplifier. The A / D sampling 4 is made using the AD9434 integrated chip produced by A / D Corporation of the United States. The baseband preprocessor (5), synchronous extractor (6), high-efficiency decoding unit (9), and service interface unit (10) are all made using K7 series FPGA chips manufactured by Xlinx Corporation of the United States.

[0027] The high dynamic range received signal reconstruction unit 7 of this invention reconstructs, de-interferences, and amplifies the pre-processed baseband signal based on synchronization information, while simultaneously obtaining channel parameters and mode information. The processed signal, along with the acquired channel parameters and mode information, is then fed into the two-dimensional transfer function corrector 8, and the mode information is fed into the high-efficiency decoding unit 9. It consists of a pattern recognizer 12, a power spectrum feature estimator 13, a high dynamic range eigenvalue analysis unit 14, an interference signal separator 15, an adaptive dynamic gain allocator 16, a signal reconstruction and interference cancellation unit 17, and a filtering unit 18. Figure 2 This is the electrical schematic diagram of the high dynamic range received signal reconstruction unit 7 of the present invention. The embodiment is as follows: Figure 2The baseband signal and synchronization information output by the baseband preprocessor 5 are sent to the pattern recognizer 12 for signal pattern recognition. After the pattern recognition is completed, the signal is sent to the adaptive dynamic gain divider 16, the filtering unit 18, and the high-efficiency decoding unit 9. The power spectrum feature estimator 13 obtains the power spectrum of the baseband signal and estimates its feature values. The obtained power spectrum feature values ​​are sent to the high dynamic feature value analysis unit 14 for high dynamic processing. The feature values ​​of the useful signal under strong interference are analyzed and purified and sent to the adaptive dynamic gain divider 16. The feature values ​​of the interference signal are sent to the interference signal separator 15. The interference signal separator 15 separates the interference in the signal according to the interference feature values. The adaptive dynamic gain divider 16 adaptively and dynamically allocates the feature value gain of the useful signal to amplify it to a suitable level. The signal reconstruction and interference cancellation unit 17 reconstructs the received signal according to the feature values ​​of the useful signal from the interference signal separator 15 and the adaptive dynamic gain divider 16. The signal is then sent to the filtering unit 18 for further filtering of interference and then sent to the two-dimensional transfer function corrector 8. The pattern recognizer 12, power spectrum feature estimator 13, high dynamic eigenvalue analysis unit 14, interference signal separator 15, adaptive dynamic gain allocator 16, signal reconstruction and interference cancellation unit 17, and filter unit 18 are all made using K7 series FPGA chips manufactured by Xlinx Corporation of the United States.

[0028] The function of the two-dimensional transfer function corrector 8 in this invention is to correct and compensate for channel distortion in the reconstructed and amplified signal based on synchronization information and channel parameters, obtain the demodulation soft value, and send it to the high-efficiency decoding unit 9 for decoding. It consists of a feature signal locator 19, a multi-sampling rate interpolator 20, a transfer function time-domain matcher 21, a transfer function time-domain corrector 22, a transfer function time delay-frequency shift domain estimate and matching canceller 23, a transfer function multi-sampling rate reconstruction and corrector 24, and a superimposed deconvolutioner 25. Figure 3 This is the electrical schematic diagram of the two-dimensional transfer function corrector 8 of the present invention. The embodiment is as follows: Figure 3Connection lines. The feature signal locator 19 locates the feature signals in the reconstructed received signal output by the high dynamic range receiving signal reconstruction unit 7 based on the synchronization information of the synchronization extractor 6, and outputs it to the transfer function time-domain matcher 21. Time-domain matching is performed using the feature signals, and the signals are then fed into the transfer function time-domain corrector 22 and the transfer function time-delay-frequency shift estimation and matching canceller 23. After the transfer function time-domain corrector 22 corrects the transfer function in the time domain, the transfer function time-delay-frequency shift estimation and matching canceller 23 estimates the transfer function in the time-delay-frequency shift domain and completes the matching cancellation. The transfer function multi-rate reconstruction and correction unit 24 performs multi-rate interpolation on the transfer function and sends it to the superimposed deconvolution unit 25. Simultaneously, the multi-rate interpolator 20 performs multi-rate interpolation on the reconstructed received signal output from the high dynamic range received signal reconstruction unit 7 based on the synchronization information from the synchronization extractor 6, and sends the interpolated reconstructed signal to the superimposed deconvolution unit 25. The superimposed deconvolution unit 25 deconvolves the signals from the multi-rate interpolator and the transfer function multi-rate reconstruction and correction unit 24 to obtain the demodulated soft value, and sends the soft value to the high-efficiency decoding unit 9. The feature signal locator 19, multi-rate interpolator 20, transfer function time-domain matcher 21, transfer function time-domain corrector 22, transfer function time delay-frequency shift estimation and matching canceller 23, transfer function multi-rate reconstruction and correction unit 24, and superimposed deconvolution unit 25 are all fabricated using K7 series FPGA chips manufactured by Xlinx Corporation.

[0029] The power supply 11 of this invention provides the DC operating voltage for the entire receiving device. In this embodiment, it is made using a commercially available general-purpose integrated regulated DC power supply module, and its output +V voltage is +5V.

[0030] The brief working principle of the high dynamic range receiving device based on two-dimensional dynamic reconstruction of the present invention is as follows:

[0031] Low-noise amplifier 1 amplifies and filters the input signal from input port A before sending it to frequency converter 2. Frequency converter 2 performs spectrum shifting on the signal before sending it to amplification and filtering unit 3 for further amplification and filtering, and then sends it to A / D sampler 4. The converted digital signal is sent to baseband preprocessor 5 for digital down-conversion and then to synchronization extractor 6 and high dynamic range received signal reconstruction unit 7 for processing. Synchronization extractor 6 extracts synchronization information and sends it to high dynamic range received signal reconstruction unit 7 and transfer function two-dimensional corrector 8 to provide synchronization reference. High dynamic range received signal reconstruction unit 7 processes the signal according to the synchronization information to obtain channel parameters and mode information, and sends the processed signal and information to transfer function two-dimensional corrector 8. At the same time, the mode information is sent to high efficiency decoding unit 9. The transfer function two-dimensional corrector 8 corrects channel distortion and compensates for the signal, and sends the obtained demodulation soft value to high efficiency decoding unit 9 for decoding. High efficiency decoding unit 9 performs high efficiency decoding according to demodulation soft value and mode information and sends it to service interface unit 10 for service demultiplexing processing before sending it to output port B.

[0032] The installation structure of this invention is as follows:

[0033] The installation structure of this invention is as follows: [The following text appears to be a separate, unrelated section:] ... Figure 1 The low-noise amplifier 1 is mounted on a printed circuit board with dimensions of 280×140mm. Figure 1 The intermediate amplification and filtering unit 3, A / D sampling unit 4, baseband and processing unit 5, high-efficiency decoding unit 9, and service unit 10 are mounted on a printed circuit board with dimensions of 280×140mm. Figure 2 , Figure 3 All circuit components are mounted on two printed circuit boards with dimensions of 280×140mm. Then, the four printed circuit boards are mounted in four shielded box plug-ins with dimensions of 290×150×30mm. The shielded box plug-ins and the frequency converter 2 are installed in the receiver chassis. The front panel of the shielded box plug-ins is equipped with cable sockets for connecting to external ports A and B, and the rear panel is equipped with a power input socket, thus assembling the present invention.

Claims

1. A high dynamic range receiving device based on two-dimensional dynamic reconstruction, comprising a low-noise amplifier (1), a frequency converter (2), an amplification and filtering unit (3), an A / D sampler (4), a baseband preprocessor (5), a synchronization extractor (6), a high-efficiency decoding unit (9), a service interface unit (10), and a power supply (11), characterized in that: It also includes a high dynamic range received signal reconstruction unit (7) and a two-dimensional transfer function corrector (8); The low-noise amplifier (1) amplifies the received small radio frequency signal and filters out out-of-band noise interference, and sends the amplified and filtered signal to the inverter (2); The inverter (2) shifts the signal from the radio frequency to the intermediate frequency and sends the intermediate frequency signal to the amplification and filtering unit (3); The amplification and filtering unit (3) amplifies the intermediate frequency signal and filters out out-of-band spurious signals and interference, and sends the amplified and filtered intermediate frequency signal to the A / D sampler (4); The A / D sampler (4) performs analog-to-digital conversion and sends the converted digital signal to the baseband preprocessor (5); The baseband preprocessor (5) performs digital down-conversion and filtering, and sends the signal to the synchronization extractor (6) and the high dynamic range receiver signal reconstruction unit (7) for processing; Synchronization extractor (6) extracts synchronization information and sends the synchronization information to high dynamic range received signal reconstruction unit (7) and transfer function two-dimensional corrector (8) to provide synchronization reference; The high dynamic receiving signal reconstruction unit (7) reconstructs, de-interferences, and amplifies the baseband preprocessed signal according to the synchronization information, and obtains channel parameters and mode information at the same time. The processed signal and the obtained channel parameters and mode information are sent to the two-dimensional transfer function corrector (8), and the mode information is sent to the high-efficiency decoding unit (9). The two-dimensional transfer function corrector (8) corrects and compensates for channel distortion of the reconstructed and amplified signal according to the synchronization information and channel parameters, obtains the demodulation soft value, and sends it to the high-efficiency decoding unit (9) for decoding. The high-efficiency decoding unit (9) performs high-efficiency decoding based on the demodulation soft value and mode information to obtain the decoded codeword, which is then sent to the service interface unit (10). The business interface unit (10) performs business sub-connection processing to obtain business information.

2. The high dynamic range receiving device based on two-dimensional dynamic reconstruction according to claim 1, characterized in that, The high dynamic received signal reconstruction unit (7) includes a pattern recognizer (12), a power spectrum feature estimator (13), a high dynamic eigenvalue analysis unit (14), an interference signal separator (15), an adaptive dynamic gain divider (16), a signal reconstruction and interference cancellation unit (17), and a filtering unit (18). The pattern recognizer (12) is used to identify the signal pattern information of the input baseband signal and synchronization information, and sends the identified signal pattern information to the adaptive dynamic gain divider (16), the filtering unit (18) and the high-efficiency decoding unit (9). The power spectrum feature estimator (13) is used to obtain the power spectrum of the baseband signal and estimate its feature values, and then sends the obtained power spectrum feature values ​​to the high dynamic feature value analysis unit (14). The high dynamic eigenvalue analysis unit (14) is used to perform high dynamic processing on the eigenvalues, analyze and purify the useful signal eigenvalues ​​under strong interference and send them to the adaptive dynamic gain divider (16), while sending the interference signal eigenvalues ​​to the interference signal separator (15). The interference signal separator (15) separates the interference in the signal according to the interference characteristic value and sends the processed signal to the signal reconstruction and interference cancellation device (17); The adaptive dynamic gain divider (16) is used to adaptively and dynamically allocate the eigenvalue gain of the useful signal, amplify it to a suitable level, and send the eigenvalue to the signal reconstruction and interference cancellation unit (17). The signal reconstruction and interference canceller (17) is used to reconstruct the received signal based on the useful signal characteristic value and send it to the filtering unit (18); The filter unit (18) further filters out interference and then sends it to the two-dimensional transfer function corrector (8).

3. The high dynamic range receiving device based on two-dimensional dynamic reconstruction according to claim 1, characterized in that, The two-dimensional transfer function corrector (8) includes a feature signal locator (19), a multi-rate interpolator (20), a transfer function time-domain matcher (21), a transfer function time-domain corrector (22), a transfer function time delay-frequency shift domain estimator and matching canceller (23), a transfer function multi-rate reconstruction and corrector (24), and a superimposed deconvolutioner (25). The feature signal locator (19) is used to locate the feature signal in the reconstructed received signal according to the synchronization information and output it to the transfer function time domain matcher (21); The transfer function time-domain matcher (21) uses the characteristic signal to perform time-domain matching to obtain the transfer function, which is then fed into the transfer function time-domain corrector (22) for correction and the transfer function time delay-frequency shift domain estimation and matching canceller (23); The transfer function time-domain corrector (22) is used to correct the transfer function in the time domain and send the corrected signal to the transfer function time delay-frequency shift domain estimate and matching canceller (23); The transfer function time delay-frequency shift domain estimator and matched canceller (23) is used to estimate the transfer function in the time delay-frequency shift domain and complete the matched cancellation, and then send the result to the transfer function multi-sampling rate reconstructor and corrector (24); The transfer function multi-rate reconstruction and corrector (24) is used to perform multi-rate interpolation on the transfer function, and the interpolated data is sent to the superimposed deconvolutioner (25). The multi-rate interpolator (20) is used to perform multi-rate interpolation on the reconstructed received signal according to the synchronization information, and then sends the interpolated reconstructed received signal to the superimposed deconvolutioner (25). The superimposed deconvolutioner (25) deconvolves the signals from the multi-rate interpolator (20) and the transfer function multi-rate reconstruction and correction unit (24) to obtain the demodulated soft value, and sends the soft value to the high-efficiency decoding unit (9).

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