CN110752897B - Multidimensional dynamic interweaving device for multi-antenna scattering communication - Google Patents
Multidimensional dynamic interweaving device for multi-antenna scattering communication Download PDFInfo
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- H04L1/00—Arrangements for detecting or preventing errors in the information received
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- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
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Abstract
The invention discloses a multi-dimensional dynamic interweaving device for multi-antenna scattering communication, and belongs to the technical field of wireless communication and scattering communication. The invention carries out self-adaptive coding modulation, interleaving, space mapping, frequency conversion and amplification at a transmitting end to realize the conversion from a baseband channel to an analog signal; after the receiving end is changed into a baseband signal through frequency mixing, amplification and channel equalization, a multidimensional channel state feedback device is utilized to obtain the proportional relation and the distribution relation of the channel quality and the signal-to-noise ratio of each channel; and then, an interleaving/de-interleaving matrix is obtained by utilizing a dynamic interleaving rule planner, and finally, the interleaving and de-interleaving rules are optimized, so that the error rate can be improved by 2 orders of magnitude, and a good transmission effect is realized. The invention can be used for high-speed information transmission under an over-the-horizon fading channel, and is particularly suitable for a multi-antenna scattering communication system with multi-transmission and multi-reception.
Description
Technical Field
The invention relates to the technical field of wireless communication and scattering communication, in particular to a multi-dimensional dynamic interweaving device for multi-antenna scattering communication, which can be used for a multi-antenna communication system with multiple transmitting antennas and multiple receiving antennas.
Background
The multi-antenna communication system is a communication system using a plurality of transmitting antennas and a plurality of receiving antennas, and is mainly used for enhancing the effect of the communication system, and the value of the multi-antenna communication system has been widely recognized in a wireless communication network.
In a communication system, interleaving is used to scatter data and is used in conjunction with error correction coding to address burst errors during information transmission. In the existing communication system, a fixed interleaving mode is generally adopted, and the interleaving mode can not meet the system requirements already when facing high-speed data transmission under a fading channel. The self-adaptive interleaving rule can disperse error bits to the maximum extent, improve the decoding success rate of the system and improve the performance of the system, but a device adopting the interleaving rule does not exist in the prior art.
Disclosure of Invention
In view of this, the present invention provides a multidimensional dynamic interleaving apparatus for multi-antenna scattering communication, which can implement adaptive optimization of interleaving and de-interleaving rules, and is suitable for high-speed information transmission under an over-the-horizon fading channel.
In order to achieve the purpose, the invention adopts the following technical scheme:
a multidimensional dynamic interleaving device for multi-antenna scattering communication comprises a transmitting antenna, a receiving antenna, an adaptive coding modulator, an interleaver, a spatial mapper, a frequency conversion and amplifier, a dynamic interleaving rule planner, a multidimensional channel state feedback device, an amplification and frequency converter, a channel equalizer, a de-interleaver, a demodulation decoder, a power supply module and a clock unit; the power supply module is used for providing power supply, and the clock unit is used for providing a working clock;
when the signal is transmitted, the adaptive coding modulator carries out adaptive error correction coding and QPSK/QAM modulation mapping on the transmitted information, and the modulated signal is sent to an interleaver; the interleaver reorders the modulation signals according to the interleaving matrix, and sends the reordered modulation signals to the space mapper; the space mapper forms multi-channel signals according to the space mapping rule and outputs the multi-channel signals to frequency conversion and amplifiers of different transmission channels; in the frequency conversion and amplifier of each transmitting channel, the multi-channel signals are respectively subjected to frequency conversion and amplification and then transmitted out through a transmitting antenna;
when receiving signals, the receiving antenna sends the received signals to the amplifying and frequency converter, the signals are subjected to low-noise amplification and down-conversion processing in the amplifying and frequency converter, converted into intermediate-frequency signals and then output to the channel equalizer; the channel equalizer is used for eliminating multipath interference and distortion brought by a channel to obtain a plurality of paths of digital baseband signals, and the plurality of paths of digital baseband signals are sent to the multidimensional channel state feedback device and the deinterleaver; the multidimensional channel state feedback device analyzes the channel quality of the digital baseband signal and outputs the channel quality, signal-to-noise ratio distribution and proportional relation to the dynamic interleaving rule planner; the dynamic interleaving rule planner generates an interleaving/deinterleaving matrix through sorting, weighting and rotating operations according to the channel quality, the signal-to-noise ratio distribution and the proportional relation, sends the interleaving matrix into the interleaver and sends the deinterleaving matrix into the deinterleaver; the de-interleaver de-interleaves the digital baseband signal according to the de-interleaving matrix and outputs the de-interleaved signal to the demodulation decoder; and the demodulation decoder performs QPSK/QAM demodulation mapping and decoding on the deinterleaved signals to obtain received information.
Further, the multidimensional channel state feedback device comprises a multi-space flow information correlation analyzer, a multi-channel signal-to-noise ratio estimator, a channel quality analyzer and an interleaving effect estimator;
after receiving the multi-channel digital baseband signals, the multi-space flow information correlation analyzer performs correlation analysis on the multi-channel digital baseband signals, separates out a plurality of independent signals passing through different paths, obtains effective channel dimensions, and outputs each independent signal to a multi-channel signal-to-noise ratio estimator; the multi-channel signal-to-noise ratio estimator estimates the signal-to-noise ratio of a plurality of independent signals to obtain the signal-to-noise ratio of each independent signal, and sends the signal-to-noise ratio to the dynamic interleaving rule planner; the channel quality analyzer analyzes the constellation diagram of each path of signal according to the multi-path digital baseband signal to obtain noise distribution and a channel diversity index, and the noise distribution and the channel diversity index are output to the interleaving effect evaluator; the interleaving effect evaluator compares and analyzes the noise distribution and the channel diversity index according to the interleaving principle to obtain the quantized interleaving effect, and sends the quantized interleaving effect to the dynamic interleaving rule planner.
Further, the dynamic interleaving rule planner comprises a proportional sorter, a distribution sorter, a weighted sorter, a multi-dimensional depth analyzer, a block rotator, a spatial rotator and a de-interleaving matrix generator;
the proportional sorter sorts the signal-to-noise ratios of the multiple paths of independent signals according to a set fourth-order polynomial, and outputs the sorted signal-to-noise ratios to the weighted sorter; the distribution sequencer sorts the quantized interweaving effect according to the exponential distribution and outputs the result to the weighting sequencer; the weighting sequencer carries out comprehensive weighting according to the output results of the proportional sequencer and the distribution sequencer so as to increase the randomness of interweaving and output the information after comprehensive weighting to the multidimensional depth analyzer; the multidimensional depth analyzer generates block rotation parameters and space rotation parameters through the information after comprehensive weighting, and respectively outputs the block rotation parameters and the space rotation parameters to the block rotator and the space rotator; the block rotator performs block rotation on the initially set interleaving matrix or the iterated interleaving matrix information according to the block rotation parameters, and outputs the interleaving matrix information after the block rotation to the space rotator; the space rotator performs space rotation on the interleaving matrix information after the block rotation according to the space rotation parameters, and outputs an interleaving matrix to the de-interleaving matrix generator, the block rotator and the interleaver; the de-interleaving matrix generator performs inverse operation on the interleaving matrix to generate a de-interleaving matrix and outputs the de-interleaving matrix to the de-interleaver.
Compared with the background technology, the invention has the following advantages:
1. the invention provides a novel design idea of a self-adaptive interleaving algorithm, compared with the traditional self-adaptive interleaving device, the method is particularly suitable for a multi-transmission and multi-reception scattering communication system, and the method improves the interleaving effect by utilizing a multi-dimensional channel state feedback device to perform correlation analysis on received signals, separate the signals and obtain effective channel dimensionality and perform weighted interleaving.
2. The invention adopts a dynamic interleaving rule planner to respectively distribute and proportionally order the channel quality and the signal-to-noise ratio and carry out comprehensive weighting, thereby increasing the randomness of interleaving and further improving the interleaving effect.
3. The invention adopts self-adaptive coding modulation at the transmitting end, thereby ensuring high-efficiency bandwidth utilization rate; and a multi-dimensional channel state feedback device is utilized at a receiving end to obtain respective channel quality, signal-to-noise ratio distribution and proportional relation of multiple channels, and then a dynamic interleaving rule planner is utilized to adjust an interleaving/de-interleaving matrix according to the distribution and proportional relation of the channel quality and the signal-to-noise ratio, so that the self-adaptive optimization of interleaving and de-interleaving rules is realized, the packet loss rate can be improved by 2 quantity levels, and a good transmission effect is realized.
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FIG. 1 is an electrical schematic block diagram of a multi-dimensional dynamic interleaving arrangement in an embodiment of the present invention;
FIG. 2 is an electrical schematic block diagram of the multi-dimensional channel state feedback of FIG. 1;
fig. 3 is an electrical schematic block diagram of the dynamic interleaving rules planner of fig. 1.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
FIG. 1 is an electrical schematic block diagram of a multi-dimensional dynamic interleaving apparatus for multi-antenna scattering communication, which includes an adaptive code modulator, an interleaver, a spatial mapper, a frequency converter and amplifier, a dynamic interleaving rule planner, a multi-dimensional channel state feedback, an amplifier and frequency converter, a channel equalizer, a deinterleaver, a demodulation decoder, a power supply, and a clock unit; wherein the content of the first and second substances,
sending information into a self-adaptive coding modulator, completing self-adaptive error correction coding and QPSK or QAM modulation mapping, and sending a modulation signal into an interleaver; the interleaver finishes reordering to the modulating signal according to the interleaving matrix, the reordered modulating signal enters the space mapper; the space mapper forms a plurality of paths of signals according to the space mapping rule and outputs the signals to different transmission channels; the multi-path signals are respectively subjected to frequency conversion and amplification and are transmitted;
after receiving signals, the receiving antenna is subjected to low-noise amplification, down-conversion and other processing in an amplification and frequency converter, converted into intermediate frequency signals and then output to a channel equalizer; the system utilizes a channel equalizer to eliminate multipath interference and distortion brought by a channel to obtain digital baseband signals, and the digital baseband signals are respectively sent to a multidimensional channel state feedback device and a deinterleaver; the multidimensional channel state feedback device analyzes the channel quality of the digital baseband signal and outputs the distribution and proportion relation of the channel quality and the signal-to-noise ratio to the dynamic interleaving rule planner; according to the channel quality, the signal-to-noise ratio distribution and the proportional relation, the dynamic interleaving rule planner generates an interleaving/de-interleaving matrix by sequencing, weighting and rotating, and simultaneously sends the interleaving matrix into the interleaver and sends the de-interleaving matrix into the de-interleaver; the de-interleaver de-interleaves the digital baseband signal according to the de-interleaving matrix and outputs the de-interleaved signal to the demodulation decoder; and the demodulation decoder performs QPSK/QAM demodulation mapping and decoding on the deinterleaved signals to finally obtain received information.
In the device, a power supply supplies power to all other modules in the device, and a clock unit supplies working clocks to other modules in the device.
In the device, the self-adaptive coding modulator, the interleaver, the space mapper, the demodulation decoder, the de-interleaver and the channel equalizer can be realized by FPGA; the frequency conversion and amplifier comprises a two-stage numerical control attenuator, a multi-stage amplifier, a filter and the like; the amplifying and frequency converter comprises a variable amplifier, an intermediate frequency filter, a mixer and the like. The implementation of these parts is common general knowledge and will not be described in detail here.
Fig. 2 is an electrical schematic diagram of a multidimensional channel state feedback device in the apparatus, wherein the multidimensional channel state feedback device comprises a multi-spatial stream information correlation analyzer, a multi-channel signal-to-noise ratio estimator, a channel quality analyzer and an interleaving effect estimator; after receiving the baseband signals, the multi-space flow information correlation analyzer performs correlation analysis on the multi-channel baseband signals, separates out a plurality of independent signals passing through different paths, obtains effective channel dimensions, and outputs the effective channel dimensions to a multi-channel signal-to-noise ratio estimator; the multi-channel signal-to-noise ratio estimator estimates the signal-to-noise ratio of a plurality of independent signals to obtain the signal-to-noise ratio of each independent signal, and sends the signal-to-noise ratio of each independent signal to the dynamic interleaving rule planner; the channel quality analyzer analyzes each path of signal constellation diagram according to the digital baseband signal to obtain noise distribution and a channel diversity index, and outputs the noise distribution and the channel diversity index to the interleaving effect evaluator; the interleaving effect evaluator compares and analyzes the noise distribution and the channel diversity index according to the interleaving principle to obtain the quantized interleaving effect, and sends the quantized interleaving effect to the dynamic interleaving rule planner.
FIG. 3 is an electrical schematic diagram of a dynamic interleaving rule planner in the above apparatus, the dynamic interleaving rule planner includes a proportional sorter, a distribution sorter, a weighted sorter, a multi-dimensional depth analyzer, a block rotator, a spatial rotator, and a de-interleaving matrix generator; the proportional sorter sorts the signal-to-noise ratios of the multiple paths of independent signals according to a set fourth-order polynomial, and outputs the sorted signal-to-noise ratios to the weighted sorter; the distribution sequencer sorts the quantized interweaving effect according to the exponential distribution and outputs the result to the weighting sequencer; the weighting sequencer carries out comprehensive weighting according to the output results of the proportional sequencer and the distribution sequencer so as to increase the randomness of interweaving and output the information after comprehensive weighting to the multidimensional depth analyzer; the multidimensional depth analyzer generates block rotation parameters and space rotation parameters through the information after comprehensive weighting, and respectively outputs the block rotation parameters and the space rotation parameters to the block rotator and the space rotator; the block rotator performs block rotation on the initially set interleaving matrix or the iterated interleaving matrix information according to the block rotation parameters, and outputs the interleaving matrix information after the block rotation to the space rotator; the space rotator performs space rotation on the interleaving matrix information after the block rotation according to the space rotation parameters, and outputs an interleaving matrix to the de-interleaving matrix generator, the block rotator and the interleaver; the de-interleaving matrix generator performs inverse operation on the interleaving matrix to generate a de-interleaving matrix and outputs the de-interleaving matrix to the de-interleaver.
The device has the following brief principle:
the device adopts multidimensional space correlation analysis and signal-to-noise ratio estimation of a plurality of independent channels to obtain effective channel dimension and provide signal-to-noise ratio information for an interleaving rule; according to the channel noise distribution, the channel quality and the signal-to-noise ratio are respectively distributed and proportionally sorted, and comprehensive weighting is carried out, so that the randomness of interleaving is increased; and an interleaving/de-interleaving matrix is obtained by adopting multi-dimensional depth analysis and block/space rotation, so that the multi-channel interleaving effect is optimal.
In a word, the invention adopts self-adaptive coding modulation at the transmitting end, thereby ensuring high-efficiency bandwidth utilization rate; and a multi-dimensional channel state feedback device is utilized at a receiving end to obtain respective channel quality, signal-to-noise ratio distribution and proportional relation of multiple channels, and then a dynamic interleaving rule planner is utilized to adjust an interleaving/de-interleaving matrix according to the distribution and proportional relation of the channel quality and the signal-to-noise ratio, so that the self-adaptive optimization of interleaving and de-interleaving rules is realized, the packet loss rate can be improved by 2 quantity levels, and a good transmission effect is realized. The invention can be used for high-speed information transmission under an over-the-horizon fading channel, and is particularly suitable for a multi-antenna scattering communication system with multi-transmission and multi-reception.
Claims (1)
1. A multidimensional dynamic interweaving device for multi-antenna scatter communication is characterized in that: the system comprises a transmitting antenna, a receiving antenna, an adaptive coding modulator, an interleaver, a space mapper, a frequency conversion and amplifier, a dynamic interleaving rule planner, a multi-dimensional channel state feedback device, an amplification and frequency conversion device, a channel equalizer, a de-interleaver, a demodulation decoder, a power supply module and a clock unit; the power supply module is used for providing power supply, and the clock unit is used for providing a working clock;
when the signal is transmitted, the adaptive coding modulator carries out adaptive error correction coding and QPSK/QAM modulation mapping on the transmitted information, and the modulated signal is sent to an interleaver; the interleaver reorders the modulation signals according to the interleaving matrix, and sends the reordered modulation signals to the space mapper; the space mapper forms multi-channel signals according to the space mapping rule and outputs the multi-channel signals to frequency conversion and amplifiers of different transmission channels; in the frequency conversion and amplifier of each transmitting channel, the multi-channel signals are respectively subjected to frequency conversion and amplification and then transmitted out through a transmitting antenna;
when receiving signals, the receiving antenna sends the received signals to the amplifying and frequency converter, the signals are subjected to low-noise amplification and down-conversion processing in the amplifying and frequency converter, converted into intermediate-frequency signals and then output to the channel equalizer; the channel equalizer is used for eliminating multipath interference and distortion brought by a channel to obtain a plurality of paths of digital baseband signals, and the plurality of paths of digital baseband signals are sent to the multidimensional channel state feedback device and the deinterleaver; the multidimensional channel state feedback device analyzes the channel quality of the digital baseband signal and outputs the channel quality, signal-to-noise ratio distribution and proportional relation to the dynamic interleaving rule planner; the dynamic interleaving rule planner generates an interleaving/deinterleaving matrix through sorting, weighting and rotating operations according to the channel quality, the signal-to-noise ratio distribution and the proportional relation, sends the interleaving matrix into the interleaver and sends the deinterleaving matrix into the deinterleaver; the de-interleaver de-interleaves the digital baseband signal according to the de-interleaving matrix and outputs the de-interleaved signal to the demodulation decoder; the demodulation decoder carries out QPSK/QAM demodulation mapping and decoding on the de-interleaved signal to obtain received information;
the multi-dimensional channel state feedback device comprises a multi-space flow information correlation analyzer, a multi-channel signal-to-noise ratio estimator, a channel quality analyzer and an interleaving effect estimator;
after receiving the multi-channel digital baseband signals, the multi-space flow information correlation analyzer performs correlation analysis on the multi-channel digital baseband signals, separates out a plurality of independent signals passing through different paths, obtains effective channel dimensions, and outputs each independent signal to a multi-channel signal-to-noise ratio estimator; the multi-channel signal-to-noise ratio estimator estimates the signal-to-noise ratio of a plurality of independent signals to obtain the signal-to-noise ratio of each independent signal, and sends the signal-to-noise ratio to the dynamic interleaving rule planner; the channel quality analyzer analyzes the constellation diagram of each path of signal according to the multi-path digital baseband signal to obtain noise distribution and a channel diversity index, and the noise distribution and the channel diversity index are output to the interleaving effect evaluator; the interleaving effect evaluator compares and analyzes the noise distribution and the channel diversity index according to an interleaving principle to obtain a quantized interleaving effect, and sends the quantized interleaving effect to the dynamic interleaving rule planner;
the dynamic interleaving rule planner comprises a proportional sequencer, a distribution sequencer, a weighted sequencer, a multi-dimensional depth analyzer, a block rotator, a space rotator and an de-interleaving matrix generator;
the proportional sorter sorts the signal-to-noise ratios of the multiple paths of independent signals according to a set fourth-order polynomial, and outputs the sorted signal-to-noise ratios to the weighted sorter; the distribution sequencer sorts the quantized interweaving effect according to the exponential distribution and outputs the result to the weighting sequencer; the weighting sequencer carries out comprehensive weighting according to the output results of the proportional sequencer and the distribution sequencer so as to increase the randomness of interweaving and output the information after comprehensive weighting to the multidimensional depth analyzer; the multidimensional depth analyzer generates block rotation parameters and space rotation parameters through the information after comprehensive weighting, and respectively outputs the block rotation parameters and the space rotation parameters to the block rotator and the space rotator; the block rotator performs block rotation on the initially set interleaving matrix or the iterated interleaving matrix information according to the block rotation parameters, and outputs the interleaving matrix information after the block rotation to the space rotator; the space rotator performs space rotation on the interleaving matrix information after the block rotation according to the space rotation parameters, and outputs an interleaving matrix to the de-interleaving matrix generator, the block rotator and the interleaver; the de-interleaving matrix generator performs inverse operation on the interleaving matrix to generate a de-interleaving matrix and outputs the de-interleaving matrix to the de-interleaver.
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