CN203119935U - An underwater communication blind equalizer suitable for a non-constant-modulus signal - Google Patents
An underwater communication blind equalizer suitable for a non-constant-modulus signal Download PDFInfo
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- CN203119935U CN203119935U CN 201320031430 CN201320031430U CN203119935U CN 203119935 U CN203119935 U CN 203119935U CN 201320031430 CN201320031430 CN 201320031430 CN 201320031430 U CN201320031430 U CN 201320031430U CN 203119935 U CN203119935 U CN 203119935U
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Abstract
The utility model relates to an underwater communication blind equalizer suitable for a non-constant-modulus signal. The underwater communication blind equalizer comprises a signal receiving part suitable for receiving the non-constant-modulus signal. The signal receiving part comprises an A/D converting module, a synchronization and channel detecting module connected with the A/D converting module, a Doppler processing module connected with the synchronization and channel detecting module, a MC-PSK demodulation module connected with the Doppler processing module, a amplitude mode value converting module connected with the MC-PSK demodulation module, and a blind equalizer connected with the amplitude mode value converting module. The amplitude mode value converting module is suitable for converting the multiple amplitude mode values of the non-constant-modulus signal into a single amplitude mode value. After the amplitude mode value of a transmitted signal is converted alike by the amplitude mode value converting module, a new amplitude mode value is equal to a new statistic mode value. Therefore, the blind equalizer has zero steady-state error when equalizing the non-constant-modulus signal.
Description
Technical field
This practicality relates to a kind of subsurface communication blind equalizer that is applicable to non-norm signal.
Background technology
Compare with airwave communication, and the intersymbol interference that exists in the underwater acoustic communication (Inter-Symbol Interference, ISI) even more serious, cause the high bit-error that receives data.In order to eliminate ISI, normal sampling strong robustness and the constant mould blind equalizer that is easy to realize, constant mould blind equalizer has the superior function of zero steady-state error for the norm signal, but non-vanishing for non-norm signal steady-state error, cause the application of constant mould blind equalizer in underwater sound communication system to be had a strong impact on.Therefore, constant mould blind equalizer being improved, is the technical barrier of this area thereby make it also have zero steady-state error performance adaptation subsurface communication environment for non-norm signal.
The utility model content
The technical problems to be solved in the utility model provides a kind of subsurface communication blind equalizer that is applicable to non-norm signal that is suitable for eliminating non-norm signal steady-state error.
In order to solve the problems of the technologies described above, the utility model provides a kind of subsurface communication blind equalizer that is applicable to non-norm signal, comprising: be suitable for receiving the signal receive section of non-norm signal,
Described signal receive section comprises: the A/D modular converter, synchronous and the Channel Detection module that links to each other with this A/D modular converter, reach Doppler's processing module that the Channel Detection module links to each other synchronously with this, the MC-PSK demodulation module that links to each other with this Doppler's processing module, the amplitude mould value transform module that is suitable for several degree mould values of non-norm signal are converted to single amplitude mould value that links to each other with this MC-PSK demodulation module, the blind equalizer that links to each other with this amplitude mould value transform module.
Further, described subsurface communication blind equalizer also comprises: be suitable for sending the signal emission part of non-norm signal, the transmitting transducer that links to each other with described signal emission part; Described signal emission part comprises: the sending module of non-norm signal, the channel coding module that links to each other with this sending module, the MC-PSK modulation module that links to each other with this channel coding module, the D/A modular converter that links to each other with this MC-PSK modulation module; Described D/A modular converter links to each other with transmitting transducer.
Technique scheme of the present utility model has the following advantages compared to existing technology: the non-norm signal after transmit through underwater acoustic channel (1), send into signal receive section by receiving transducer.Through signal synchronously and after the Channel Detection, non-norm signal carries out estimation and the Doppler effect correction of Doppler frequency, with the influence of counteracting Doppler frequency shift to non-norm input in signal receive section; (2) after the non-norm signal amplitude mould value of transmission was done identical conversion through amplitude mould value transform module, its new amplitude mould value equated with new statistics mould value, is zero thereby make blind equalizer steady-state error when non-norm signal is carried out equilibrium.
Description of drawings
Content of the present utility model is easier clearly to be understood in order to make, below the specific embodiment and by reference to the accompanying drawings of basis, the utility model is described in further detail, wherein
Fig. 1 is the structural representation of subsurface communication blind equalizer of the present utility model;
Fig. 2 is the structural representation of the signal emission part of subsurface communication blind equalizer of the present utility model.
Embodiment
The present invention is described in detail below in conjunction with drawings and Examples:
See Fig. 1, a kind of subsurface communication blind equalizer that is applicable to non-norm signal comprises: be suitable for receiving the signal receive section of non-norm signal, the receiving transducer that links to each other with described signal receive section;
Described signal receive section comprises: the A/D modular converter that links to each other with described receiving transducer, synchronous and the Channel Detection module that links to each other with this A/D modular converter, reach Doppler's processing module that the Channel Detection module links to each other synchronously with this, the MC-PSK demodulation module that links to each other with this Doppler's processing module, the amplitude mould value transform module that is suitable for several degree mould values of non-norm signal are converted to single amplitude mould value that links to each other with this MC-PSK demodulation module, with the blind equalizer that this amplitude mould value transform module links to each other, the channel decoding module that links to each other with described blind equalizer.
See Fig. 2, described subsurface communication blind equalizer also comprises: be suitable for sending the signal emission part of non-norm signal, the transmitting transducer that links to each other with described signal emission part; Described signal emission part comprises: the sending module of non-norm signal, the channel coding module that links to each other with this information sending module, the MC-PSK modulation module that links to each other with this channel coding module, the D/A modular converter that links to each other with this MC-PSK modulation module; Described D/A modular converter links to each other with transmitting transducer.
The course of work of described subsurface communication blind equalizer is as follows:
Signal emission part: the non-norm signal of transmission at first enters channel encoder, in order to carry out error control, improves the reliability of system.Chnnel coding comprises error correction coding and interweaves.Code signal is carrying out multicarrier-phase shift keying (MC-PSK) modulation.Digital signal after the modulation is sent into underwater acoustic channel through transmitting transducer after the D/A conversion.
Signal receive section: through the non-norm signal after the underwater acoustic channel transmission, send into signal receive section by receiving transducer.Through signal synchronously and after the Channel Detection, non-norm signal carries out estimation and the Doppler effect correction of Doppler frequency, with the influence of counteracting Doppler frequency shift to input in signal receive section.Signal after the compensation at first to the Frequency Estimation of multicarrier, is carrying out the MC-PSK demodulation with the frequency of estimating to non-norm signal through the MC-PSK demodulation.In order to offset channel multi-path transmission and phase fluctuation to the influence of coherent detection, signal also must convert several degree mould values of non-norm signal to single amplitude mould value by amplitude mould value transform module after the MC-PSK demodulation, passing through blind equalizer and embedded digital phase-locked loop then, carry out the associating best estimate of equalizing coefficient and signal phase, namely according to this amplitude mould value transform mode constant mould blind equalizer cost function is revised.Signal after the judgement recovers former emission information through deinterleaving, error-correcting decoding.Signal amplitude mould value is through after the identical conversion, and its new amplitude mould value equates with new statistics mould value, is zero thereby make blind equalizer steady-state error when non-norm signal is carried out equilibrium.
Obviously, above-described embodiment only is for the utility model example clearly is described, and is not to be restriction to execution mode of the present utility model.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give all execution modes exhaustive.And these belong to apparent variation or the change that spirit of the present utility model extended out and still are among the protection range of the present utility model.
Claims (2)
1. subsurface communication blind equalizer that is applicable to non-norm signal, it is characterized in that comprising: the signal receive section that is suitable for receiving non-norm signal, this signal receive section comprises: the A/D modular converter, synchronous and the Channel Detection module that links to each other with this A/D modular converter, reach Doppler's processing module that the Channel Detection module links to each other synchronously with this, the MC-PSK demodulation module that links to each other with this Doppler's processing module, the amplitude mould value transform module that is suitable for several degree mould values of non-norm signal are converted to single amplitude mould value that links to each other with this MC-PSK demodulation module, the blind equalizer that links to each other with this amplitude mould value transform module.
2. the subsurface communication blind equalizer that is applicable to non-norm signal according to claim 1, it is characterized in that, described subsurface communication blind equalizer also comprises: be suitable for sending the signal emission part of non-norm signal, the transmitting transducer that links to each other with described signal emission part;
Described signal emission part comprises: the sending module of non-norm signal, the channel coding module that links to each other with this sending module, the MC-PSK modulation module that links to each other with this channel coding module, the D/A modular converter that links to each other with this MC-PSK modulation module; Described D/A modular converter links to each other with transmitting transducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320031430 CN203119935U (en) | 2013-01-22 | 2013-01-22 | An underwater communication blind equalizer suitable for a non-constant-modulus signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320031430 CN203119935U (en) | 2013-01-22 | 2013-01-22 | An underwater communication blind equalizer suitable for a non-constant-modulus signal |
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| Publication Number | Publication Date |
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| CN203119935U true CN203119935U (en) | 2013-08-07 |
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| CN 201320031430 Expired - Fee Related CN203119935U (en) | 2013-01-22 | 2013-01-22 | An underwater communication blind equalizer suitable for a non-constant-modulus signal |
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| CN (1) | CN203119935U (en) |
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- 2013-01-22 CN CN 201320031430 patent/CN203119935U/en not_active Expired - Fee Related
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130807 Termination date: 20140122 |