CN106059985A - Demodulating device and demodulating method based on vector - Google Patents
Demodulating device and demodulating method based on vector Download PDFInfo
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- CN106059985A CN106059985A CN201610608738.5A CN201610608738A CN106059985A CN 106059985 A CN106059985 A CN 106059985A CN 201610608738 A CN201610608738 A CN 201610608738A CN 106059985 A CN106059985 A CN 106059985A
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- vector
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
- H04L27/38—Demodulator circuits; Receiver circuits
Abstract
The invention discloses a demodulating device and a demodulating method based on a vector. The demodulating device based on the vector comprises a configuration unit and a lookup table unit, wherein the configuration unit is used for receiving configuration information of users so as to map digital signals to corresponding vector signals; and the lookup table unit is used for storing the digital signals, the corresponding vector signals and mapping relationships between the digital signals and the corresponding vector signals in a form of a lookup table and is also used for looking up the lookup table according to the input digital signals and outputting the corresponding vector signals. According to the application, by the configuration unit and the lookup table unit, a signal modulation mode is configurable, and the digital signals are mapped into the vector signals, so that phase and amplitude modulation can be simultaneously implemented, and thus, the modulation mode of the demodulating device and the demodulating method which are disclosed by the application can be compatible to any existing modulation modes including rectangular QAM (Quadrature Amplitude Modulation), heart-shaped QAM, PSK (Phase Shift Keying), ASK (Amplitude Shift Keying) and the like.
Description
Technical field
The present invention relates to modulation technique field, particularly relate to a kind of demodulating equipment based on vector and demodulation method.
Background technology
Demodulation is the process recovering message from the modulated signal carrying message.In the transmission of various information or processing system
In, carrier wave is modulated by the message that transmitting terminal to be transmitted, and produces the signal carrying this message, and receiving terminal must recover
The message transmitted just can be used.Demodulation is the inverse process of modulation.Modulation system is different, and demodulation method is the most different.With
The classification of modulation is corresponding, and demodulation can be divided into the sinusoidal wave mediation impulse wave that solves to demodulate.Sinusoidal wave demodulation also can be further divided into amplitude solution
Tune, frequency demodulation and phase demodulating, in addition with the demodulation of some mutation such as single sideband singal, vestigial sideband (vsb) signal demodulation etc..With
Sample, impulse wave demodulation also can be divided into pulse amplitude demodulation, impulse phase demodulation, the mediation pulse code demodulation of pulse width solution etc..
Multiple Modulation is needed to be equipped with multiple demodulation.Owing to digital baseband signal can only take limited discrete value, so accordingly
Carrier wave parameter also can only take limited discrete value, and modulated signal can be regarded as and be gone to control switch to not by digital baseband signal
The result switched over the carrier wave of parameter, this implementation method is referred to as keying, therefore, generally above-mentioned three kinds of basic numbers
Word modulation system is called ASK (amplitude shift keying), FSK (frequency shift keying), PSK (phase-shift keying (PSK)).In basic digital modulation
On the basis of mode, derive QAM (quadrature amplitude modulation), the hybrid modulation of its substantially ASK and PSK.
In the prior art, regardless of modulation system, the method being mapped to modulation symbol from digital signal is all solid
Fixed, it is not possible to programming, the most also cannot be compatible.Correspondingly, corresponding with modulation system demodulation mode is also cannot
Programming, the most also cannot be compatible.In existing modulation technique, in planisphere, the relative position between constellation point is all fixing
, non-programmable, constellation point can not be chosen at random according to the actual requirements.Correspondingly, in demodulation techniques, constellation in planisphere
Relative position between point is all fixing, non-programmable, can not choose at random constellation point according to the actual requirements.
Summary of the invention
Defect that can not be compatible and non-programmable for demodulation modes various in prior art, the present invention provides a kind of
Demodulating equipment based on vector and demodulation method.
The technical scheme that the present invention proposes with regard to above-mentioned technical problem is as follows:
On the one hand, it is provided that a kind of demodulating equipment based on vector, including:
Look-up table unit, for store in the form of a lookup table the vector signal digital signal corresponding with vector signal and
Its mapping relations；And
Comparing unit, for comparing the vector signal of input with the vector signal being stored in described look-up table unit
Relatively, described look-up table unit exports corresponding digital signal according to the comparative result of described comparing unit.
Preferably, described vector signal is any vector signal in planisphere in any quadrant, and each in planisphere
Differ.
Preferably, in planisphere, it is separate between described vector signal.
Preferably, described look-up table unit is depositor.
On the other hand, additionally provide a kind of demodulation method based on vector, comprise the following steps:
S1, store vector signal, corresponding digital signal and mapping relations thereof in the form of a lookup table；And
S2, the vector signal of input is compared with the vector signal being stored in described look-up table unit, and according to
The digital signal of the comparative result output correspondence of described comparing unit.
Preferably, described vector signal is any vector signal in planisphere in any quadrant, and each in planisphere
Differ.
Preferably, in planisphere, it is separate between described vector signal.
Preferably, described look-up table stores in a register.
Implement the embodiment of the present invention, have the advantages that the application is made by comparing unit and look-up table unit
The compatible any existing demodulation mode of demodulation mode of signal, including rectangle QAM, heart-shaped QAM, PSK and ASK etc..And, this
The demodulation method of application, based on vector, can have the function of amplitude modulation and phase modulation simultaneously.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to
Other accompanying drawing is obtained according to these accompanying drawings.
Fig. 1 is the communication system exemplary block diagram that the embodiment of the present invention provides；
Fig. 2 is the demodulating equipment structural representation shown in Fig. 1；
Fig. 3 is the demodulation method flow chart that the present invention provides；
Fig. 4 a and 4b is the planisphere structural representation that the embodiment of the present invention provides.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on
Embodiment in the present invention, those of ordinary skill in the art obtained on the premise of not making creative work all its
His embodiment, broadly falls into the scope of protection of the invention.
Communication system
Fig. 1 is the exemplary block diagram of the communication system that the embodiment of the present invention provides.This communication system 100 includes: message sink coding
Device 102, channel coding device 104, modulating device 106, channel 108, demodulating equipment 110, channel deciphering device 112 and information source
Code device 114.Source encoder 102 is for receiving information source 151 to be sent.Message sink coding device 102 is for information source 151
Encode, and produce source coded signal 152.Channel coding device 104 is for carrying out channel volume to source coded signal 152
Code, and produce channel encoded signal 153.Modulating device 106 for being modulated into signal 154 to be sent by coding signal 153.
This signal 154 to be sent provides reception signal 155 by channel 108 to receiving terminal.This channel 108 includes but does not limits
In, microwave radio link, satellite channel, fiber optic cables, composite fiber cable system or copper cable.This channel 108 includes propagating matchmaker
It is situated between, interference and distortion can be incorporated in signal 154 to be sent so that receive signal 155 and be different from signal 154 to be sent.Dry
Disturb and include but not limited to noise, decay, phase shift variations etc. with distortion.
Demodulating equipment 110 is for being demodulated to demodulated signal 156 by reception signal 155.Channel decoding device 112 will be for solving
Signal 156 is adjusted to be decoded into channeldecoded signal 157.Source coding device 114 is for decoding channeldecoded signal 157 further
Become echo signal 158.This echo signal 158 is provided to one or more receiver user device.These one or more receptions
Device user's set includes but not limited to personal computer, digital terminal equipment, telephone device, personal digital assistant, software application
Or any other can send or receive the device of data.
Demodulating equipment
Fig. 2 is the demodulating equipment structural representation that the embodiment of the present invention provides.This demodulating equipment 110 includes: comparing unit
202 and look-up table unit 204.Look-up table unit 204 is corresponding with vector signal for storing vector signal in the form of a lookup table
Digital signal and mapping relations.Select storage vector signal and mapping relations in the form of a lookup table, the most permissible
Ensure that vector signal and mapping relations can arbitrarily change.Because mapping relations are stored in form rather than make solidification
Circuit, therefore they can be updated at any time.In the communication system that the present invention provides, it is sent to target in information source 151
Prior to or just when terminal, the digital signal of storage, vector signal and mapping relations thereof in modulating device 106 can be sent to modulation
Device 110, thus modulating device 110 can correspondingly automatically update the content in its look-up table.In one embodiment of the present of invention
In, the mapping relations between digital signal and vector signal are for map one by one.
Comparing unit 202 is for by the vector signal 155 of input and the vector signal being stored in look-up table unit 204
251 compare, and look-up table unit 204 exports the digital signal 156 of correspondence according to the comparative result 252 of comparing unit 202.
In one embodiment of the invention, look-up table unit 204 can use multiple data search method thus quick
Find the vector signal 251 mated with input vector signal 155 to be input in comparing unit 202.In this manner it is possible to greatly
Ground reduces the number of times that comparing unit 202 compares, and improves operating rate and reduces power consumption.The data that look-up table unit 202 is used
Lookup method includes: sequential search method, binary chop, binary tree etc..In an embodiment of the present invention, if look-up table unit
There is not vector signal identical with input vector signal 155 in 204, then select and input number signal 155 apart from
Near vector signal is as the vector signal of input, and is made by the digital signal 156 corresponding to this closest vector signal
Output for look-up table unit 204.
In one embodiment of the invention, as shown in Figs. 4a and 4b, vector signal A1～A8 can be any in planisphere
Any vector signal in quadrant, and different in planisphere.As shown in fig. 4 a, vector signal A1～A8 is selected from constellation
The same quadrant of figure.As shown in Figure 4 b, vector signal A1～A8 is also selected from the different quadrants of planisphere.But whether be from
Same quadrant is still from different quadrants, and vector signal A1～A8 is different in planisphere, thus can ensure numeral
Mapping relations between signal and vector signal are for map one by one.
In another embodiment that the present invention provides, as shown in Figs. 4a and 4b, it is permissible between vector signal A1～A8
Separate, there is no any dependence between vector signal.User can select each vector signal targetedly.
Should be understood that user can be separately configured each vector signal to there is certain between them specific according to actual needs
Incidence relation.So, when the compatible existing modulation system of needs, vector signal can be configured to meet existing modulation
Mode.
In the embodiment that the present invention provides, look-up table unit 204 is depositor.The digital signal 153 of input can
Thinking the address signal of depositor, the vector signal 154 corresponding with digital signal 154 is storable in depositor.Work as input
During a certain concrete address signal 153, depositor 204 exports the vector signal 154 stored in this address the most automatically.Address is believed
Number and vector signal between corresponding relation can be configured by dispensing unit 202.
The application makes the compatible any existing demodulation of demodulation mode of signal by comparing unit and look-up table unit
Mode, including rectangle QAM, heart-shaped QAM, PSK and ASK etc..And, the demodulation method of the application, can be based on vector simultaneously
There is the function of amplitude modulation and phase modulation.
Demodulation method
Present embodiments provide a kind of demodulation method based on vector, can as it is shown on figure 3, be somebody's turn to do demodulation method based on vector
Being applied in demodulating equipment as described above, the method can comprise the following steps that
S1, store vector signal, corresponding digital signal and mapping relations thereof in the form of a lookup table；And
S2, the vector signal of input is compared with the vector signal being stored in described look-up table unit, and according to
The digital signal of the comparative result output correspondence of described comparing unit.
In one embodiment of the invention, as shown in Figs. 4a and 4b, vector signal A1～A8 can be any in planisphere
Any vector signal in quadrant, and different in planisphere.As shown in fig. 4 a, vector signal A1～A8 is selected from constellation
The same quadrant of figure.As shown in Figure 4 b, vector signal A1～A8 is also selected from the different quadrants of planisphere.But whether be from
Same quadrant is still from different quadrants, and vector signal A1～A8 is different in planisphere, thus can ensure numeral
Mapping relations between signal and vector signal are for map one by one.
In another embodiment that the present invention provides, as shown in Figs. 4a and 4b, it is permissible between vector signal A1～A8
Separate, there is no any dependence between vector signal.User can select each vector signal targetedly.
Should be understood that user can be separately configured each vector signal to there is certain between them specific according to actual needs
Incidence relation.So, when the compatible existing modulation system of needs, vector signal can be configured to meet existing modulation
Mode.
In the embodiment that the present invention provides, look-up table stores in a register.As shown in table 1 below, in look-up table 1
Contain vector signal A1～A8 of input, (assume address signal with vector signal digital signaling zero 00～111 one to one
It is 3 bits) in.Should be understood that the number of bits of address signal is 3 simply citings in the present embodiment, be not for limiting
The figure place of address signal processed, the figure place of address signal can be designed to meet any modulation system as required.In conjunction with Fig. 2 institute
Show, when inputting a certain concrete vector signal 155, look-up table unit 204 according to certain lookup method by look-up table
One or several input of vector signal A1～A8 kind compares with vector signal 155 to comparator 202, then according to than
The digital signal 156 that the output of relatively result is corresponding.Such as, when vector signal 155 and the vector signal A2 phase in look-up table of input
Meanwhile, comparative result 252 is fed back to look-up table unit 204 by comparing unit 202, and then look-up table unit 204 exports and vector
Digital signaling zero 00 corresponding for signal A2.The most such as, as vector signal 155 and vector signal A1～A8 in look-up table of input
It is different from, but during with A5 closest, comparative result is fed back to look-up table unit 204, Jin Ercha by comparing unit 252
Look for the digital signal 110 that table unit 204 output is corresponding with vector signal A5.
Table 1 look-up table
| Vector signal | Digital signal |
| A1 | 000 |
| A2 | 001 |
| A3 | 011 |
| A4 | 010 |
| A5 | 110 |
| A6 | 111 |
| A7 | 101 |
| A8 | 100 |
The application makes the compatible any existing demodulation of demodulation mode of signal by comparing unit and look-up table unit
Mode, including rectangle QAM, heart-shaped QAM, PSK and ASK etc..And, the demodulation method of the application, can be based on vector simultaneously
There is the function of amplitude modulation and phase modulation.
Should be understood that digital signal uses Gray code in above-mentioned look-up table 1, to reduce the bit error rate.The present invention's
In other embodiments, it would however also be possible to employ other binary codes.
Above disclosed it is only one preferred embodiment of the present invention, certainly can not limit the power of the present invention with this
Profit scope, one of ordinary skill in the art will appreciate that all or part of flow process realizing above-described embodiment, and weighs according to the present invention
Profit requires the equivalent variations made, and still falls within the scope that invention is contained.
Claims (8)
1. a demodulating equipment based on vector, it is characterised in that including:
Look-up table unit, for storing the vector signal digital signal corresponding with vector signal in the form of a lookup table and reflecting
Penetrate relation；And
Comparing unit, for the vector signal of input is compared with the vector signal being stored in described look-up table unit,
Described look-up table unit exports corresponding digital signal according to the comparative result of described comparing unit.
Demodulating equipment based on vector the most according to claim 1, it is characterised in that described vector signal is in planisphere
The arbitrarily any vector signal in quadrant, and different in planisphere.
Demodulating equipment based on vector the most according to claim 2, it is characterised in that in planisphere, described vector is believed
It is separate between number.
Demodulating equipment the most according to claim 1, it is characterised in that described look-up table unit is depositor.
5. a demodulation method based on vector, it is characterised in that comprise the following steps:
S1, store vector signal, corresponding digital signal and mapping relations thereof in the form of a lookup table；And
S2, the vector signal of input is compared with the vector signal being stored in described look-up table unit, and according to described
The digital signal of the comparative result output correspondence of comparing unit.
Demodulation method based on vector the most according to claim 5, it is characterised in that described vector signal is in planisphere
The arbitrarily any vector signal in quadrant, and different in planisphere.
Demodulation method based on vector the most according to claim 6, it is characterised in that in planisphere, described vector is believed
It is separate between number.
Demodulation method based on vector the most according to claim 5, it is characterised in that described look-up table is stored in depositor
In.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018018579A1 (en) * | 2016-07-29 | 2018-02-01 | 武汉芯泰科技有限公司 | Vector-based demodulation apparatus and demodulation method |
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| CN103179079A (en) * | 2011-12-21 | 2013-06-26 | 北京普源精电科技有限公司 | Method and device for generating quadrature amplitude modulation signals and digital signal generator |
| US20140270014A1 (en) * | 2013-03-15 | 2014-09-18 | Samsung Electronics Co., Ltd. | Method and apparatus for performing soft demapping in rotated quadrature amplitude modulation (qam) based communication system |
| CN105471804A (en) * | 2014-09-11 | 2016-04-06 | 北京计算机技术及应用研究所 | Millimeter wave NOLS (Non line of Sight) communication system and method |
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Application publication date: 20161026 |