CN104243367B - The reception device and method of convergence rate are changed in acceleration etc. - Google Patents
The reception device and method of convergence rate are changed in acceleration etc. Download PDFInfo
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- CN104243367B CN104243367B CN201310236626.8A CN201310236626A CN104243367B CN 104243367 B CN104243367 B CN 104243367B CN 201310236626 A CN201310236626 A CN 201310236626A CN 104243367 B CN104243367 B CN 104243367B
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Abstract
The present invention provides the reception device and method that convergence rate is changed in a kind of acceleration etc., and applied to the receiving terminal of a communicator, the communicator includes first device.The reception device includes：One wave filter, it is filtered for a reception signal to reduce its multipath effect, and exports a filtered signal；And a channel estimation device, carry out channel estimation for the reception signal and produce an estimation result according to this, the estimation result is determining that selection one is sent to the eqalizing cricuit from the reception signal and the filtered signal.
Description
Technical field
The present invention is related to a kind of receiver, especially with regard to a kind of reception being pre-filtered according to passage estimated result
Device.
Background technology
In modern communication technology, transmission end and receiving terminal all can be using the communication protocols or standard of both sides' understanding, with profit
The communication of both sides.The signal that transmission end is sent passes through transmission channel or passage (channel), is received by receiving terminal.Due to
Signal may be mixed into many interference or noise, signal is also decayed in the process, therefore receiving terminal in after transmission channel
Mostly all channel estimation (channel can be carried out first with known pilot signal among signal (pilot signal)
estimation).Estimating passage signal caused the influence of what sample and then the signal to being received is carried out etc. changes
(equalization) step, it becomes possible to reduce the primary signal that transmission end is sent as far as possible.
It refer to shown in Fig. 1, it is the model schematic that prior art is propagated passage.What transmission end 110 was sent
Signal is with x (n) as representing, the received signal of receiving terminal 130 is with y (n) as representing.Signal x (n) can pass through passage 120
Distortion and pollution.
In some cases, passage 120 is likely to result in more complicated multipath (multipath) effect.It is so-called more
Footpath effect is due to that signal x (n) arrives at receiving terminal 130 by mulitpath, different in size due to these paths, therefore signal
X (n) can successively arrive at receiving terminal 130.Multipath effect can not only cause signal x (n) strength retrogressions that every paths are transmitted,
Delaying the signal arrived at can more likely interfere to follow-up signal.In Fig. 1, influence of the multipath effect for signal is with h (n)
As expression.
In addition to the signal skew caused by multipath effect h (n), the passage 120 not disturbed especially typically can also
Receive random interference.Commonly referred to as Additive White Gaussian is made an uproar news (AWGN, Additive White Gaussian
Noise), in Fig. 1 with w (n) as representing.
Made an uproar by multipath effect h (n) and Additive White Gaussian after news w (n) distortion and pollution, receiving terminal 130 is connect
The signal of receipts can pass through a channel estimation module 132.Utilize channel impulse response (CIR, Channel Impulse
Response estimation), the channel estimation module can be transmitted to first device 134 next message is estimated, for compensating passage
120 for the distortion and pollution caused by signal.The signal exported after being compensated by the eqalizing cricuit 134It will connect
The signal x (n) that nearly transmission end 110 is spread out of.
Although above-mentioned traditional channel estimation module 132 can deal with multipath effect, for being arrived at by multiple paths
Same intensity signal, generally require the very long time is handled with pulling over, and the compensation of eqalizing cricuit 134 can converge to can be with
The degree used.
It refer to shown in Fig. 2A, it represents to be intended to for a generation for a certain multipath effect.The figure shows the institute of transmission end 110
The signal sent, by the multipath effect h (n) of three paths.The signal passes through after this three paths, due to path length
Difference, identical time order and function can be respectively separated and arrive at receiving terminal 130.And the energy of the signal is fifty-fifty along this three
Propagated, so the energy that each paths are assigned to is about identical.In other words, not one transmission energy highest
Predominating path and other relatively low secondary paths of transmission energy.
It refer to shown in Fig. 2 B, it is an actual amount mapping of Fig. 2A multipath effect.Among Fig. 2 B, there are three projections
Energy peak, propagation time of the representation signal in three different paths.
General traditional eqalizing cricuit 134 designs, such as decision feedback equalizer (DFE, Decision Feedback
Equalizer the processing of pulling over that received signal carries out feedback signal can) be directed to.If what is received is such as Fig. 2A and Fig. 2 B
Such multipath effect h (n), due to having no idea to judge which paths is the most predominating path of energy, therefore eqalizing cricuit
Convergence time required for 134 adjusting parameters is quite long.
It refer to shown in Fig. 3, it is signal to noise ratio and time of the eqalizing cricuit 134 under multipath effect shown in Fig. 2A and Fig. 2 B
Figure.Since the signal for receiving the first paths, eqalizing cricuit just proceeds by calculating of pulling over.Which but have no idea that bar judged
Path is the most predominating path of energy, so the time that eqalizing cricuit must take more than one second just can carry the signal to noise ratio of output signal
Be raised to can later use degree.
For modern high-speed communications systems, if had under multipath effect by so long convergence time
It can complete etc. to change step, tangible is difficult to make us receiving.Therefore, it is necessary to which one kind can overcome multipath effect and allow eqalizing cricuit rapidly
134 apparatus and method of the output with high s/n ratio, in order to make the soon reception signal of receiving terminal 130.
The content of the invention
According to an embodiment, the present invention provides a kind of reception device, applied to the receiving terminal of a communicator, communication dress
Put and include first device.The reception device includes：One wave filter, it is filtered for a reception signal to reduce its multipath effect
Should, and export a filtered signal；And a channel estimation device, carry out channel estimation for the reception signal and produce one according to this
Estimate result, the estimation result to determine from the reception signal and the filtered signal select one be sent to suchization
Device.
According to another embodiment, the present invention provides a kind of method of reseptance, applied to the receiving terminal of a communicator, the communication
Device includes first device, and the method for reseptance comprises the steps of：A filtering is carried out for a reception signal to reduce its multichannel
Footpath effect, and export a filtered signal；Channel estimation is carried out for the reception signal and produces an estimation result according to this；And
Determine to select one to be sent to the eqalizing cricuit from the reception signal and the filtered signal according to the estimation result.
More preferably understand to have to the above-mentioned and other aspect of the present invention, special embodiment below, and coordinate accompanying drawing, make
Describe in detail as follows：
Brief description of the drawings
Fig. 1 is the model schematic that prior art is propagated passage.
Fig. 2A is that a generation for a certain multipath effect represents to be intended to.
Fig. 2 B are an actual amount mapping of Fig. 2A multipath effect.
Fig. 3 is the schematic diagram of signal to noise ratio of the eqalizing cricuit under multipath effect shown in Fig. 2A and Fig. 2 B.
Fig. 4 A are the block schematic diagram according to the receiving terminal of one embodiment of the invention.
Fig. 4 B are the block schematic diagram according to the receiving terminal of another embodiment of the present invention.
Fig. 4 C are the block schematic diagram according to the receiving terminal of another embodiment of the present invention.
Fig. 5 A are the block schematic diagram according to the receiving terminal of another embodiment of the present invention.
Fig. 5 B are the block schematic diagram according to the receiving terminal of another embodiment of the present invention.
Fig. 5 C are a block schematic diagram of the receiving terminal of another embodiment of the present invention.
Fig. 6 A are the block schematic diagram according to the more receiving terminal of an embodiment of the invention.
Fig. 6 B are the block schematic diagram according to the more receiving terminal of an embodiment of the invention.
Fig. 7 is the block schematic diagram according to the receiving terminal of another embodiment of the present invention.
Fig. 8 A are the effect diagram according to the wave filter of one embodiment of the invention.
Fig. 8 B are another effect simulation figure according to the wave filter of one embodiment of the invention.
Fig. 9 is the simulation schematic diagram according to the signal to noise ratio of the eqalizing cricuit of one embodiment of the invention.
Figure 10 is the schematic flow sheet according to a method of reseptance of one embodiment of the invention.
Figure 11 is the schematic flow sheet according to a method of reseptance of another embodiment of the present invention.
Figure 12 is the schematic flow sheet according to a method of reseptance of a more embodiment of the invention.
Symbol description
110 transmission ends
120 passages
130 receiving terminals
132 channel estimation modules
134 eqalizing cricuits
430 receiving terminals
432 channel estimation modules
434 eqalizing cricuits
436 channel estimation modules
438 wave filters
440 selectors
538 tunable filters
638-1~638-m wave filters
738-1~738-2 wave filters
1010~1050 steps
1130~1150 steps
1230~1270 steps
Embodiment
It is as follows that the present invention will be described in some embodiments.However, in addition to disclosed embodiment, the present invention can also
Other embodiments are widely used in implement.The scope of the present invention is simultaneously not limited to the examples restriction, is with Shen thereafter
Please the scope of the claims be defined.And it is even if that the invention that clearer description one of ordinary skill in the art is understood that the present invention is provided
Content, it is illustrated that interior each several part does not have the size relative according to its and ratio and drawn, some sizes and other scale dependents
Ratio regular meeting highlighted and the exaggeration that seems, and incoherent detail section is not also drawn completely, in the hope of diagram it is succinct easily
Understand.
In the model shown in Fig. 1, the digital signal that eqalizing cricuit 134 is received receives the influence of multipath effect, so
It is difficult to the higher degree of signal to noise ratio is converged in a short time.Therefore, one of feature of the invention, it is to the institute of eqalizing cricuit 134
The digital signal of reception is first filtered.First it is filtered in particular according to channel estimation result, is connect with reducing eqalizing cricuit 134
The influence of the multipath effect in digital signal is received, so the can of eqalizing cricuit 134 reduces the time of convergence signal to noise ratio.Through above-mentioned
Inventive features, required convergence time can significantly reduces.The narration of several embodiments is will transmit through below, in explanation
The inventive features stated.
It refer to shown in Fig. 4 A, it is a block schematic diagram of the receiving terminal 430 of one embodiment of the invention.With showing for Fig. 1
Intention is compared, and the embodiment shown in Fig. 4 A equally has a channel estimation module 432 and first device 434.With Fig. 1 previous skill
Unlike art, there is a channel estimation module 436, a wave filter 438 and a selector 440 before eqalizing cricuit 434.Its
In the selector 440 can include two input signals, that is, the received signal y (n) of receiving terminal 430 and wave filter 438
Output signal z (n).The selector 440 can be according to the channel estimation module 436 to receiving terminal received signal y (n) institutes
The channel estimation result done, from two above-mentioned input signal y (n) and z (n), one of them is selected to be input to eqalizing cricuit 434
With channel estimation module 432.The estimation result that the channel estimation module 436 is exported is related to the degree of multipath effect.
The influence of the wave filter 438 to signal is designated as p (n).In one embodiment, the effect of the wave filter is to widen
Capacity volume variance in the reception signal between a first path signal and one second path signal.Therefore, when receiving terminal 430 is received
Signal y (n) can be by after above-mentioned wave filter 438, being influenceed on the integral passage of eqalizing cricuit 434WhereinThat represent is linear convolution (linear convolution).In one embodiment, when logical
When the channel estimation result of road estimating module 436 indicates multipath effect, selector 440 will select input signal z (n), and will
It is exported.In other words, signal y (n) device 438 after filtering, when turning into the signal z (n) after filtering and being sent to eqalizing cricuit 434, multipath
The situation of effect will be enhanced.For example there is the higher predominating path of a peak value so that the convergence rate of eqalizing cricuit 434 adds
It is fast many.
However, be not that every subchannel 120 multipath effect h (n) can all occur, or multipath effect is not so bright
It is aobvious.In another embodiment, when the channel estimation result of channel estimation module 436 represents not having multipath effect, or multipath
When the degree of effect is less than a threshold value, selector 440 will select input signal y (n), and be sent to eqalizing cricuit 434.More one
In embodiment, for example, if only two paths, via signal of the signal energy that predominating path is transmitted than secondary path
Energy is much higher, then eqalizing cricuit 434 can also soon restrain its signal to noise ratio.In the case of above-mentioned, when channel estimation mould
The channel estimation result of block 436 represents and does not need the filtering of wave filter 438, and selector 440 will also select input signal y (n),
And it is sent to eqalizing cricuit 434.
In other words, the channel estimation module 436 that Fig. 4 A receiving terminal 430 is included is responsible for what receiving terminal 430 was received
Signal y (n) enters the estimation of row of channels.When the channel estimation module 436 thinks that multipath effect h (n) reaches the above to a certain degree,
Make received signal y (n) be modified through wave filter 438, eqalizing cricuit 434 is entered back into after obtaining signal z (n).Otherwise, institute is made
Reception signal y (n) skips wave filter 438 and is directly entered eqalizing cricuit 434.
It refer to shown in Fig. 4 B, it is a block schematic diagram of the receiving terminal 430 of one embodiment of the invention.With Fig. 4 A phases
Than the position of selector 440 changes to before wave filter 438.According to the estimation result of channel estimation module 436, selector 440
Input signal y (n) is selectively output to eqalizing cricuit 434 or wave filter 438.Assuming that estimation result thinks that eqalizing cricuit 434 needs
Want the help of wave filter 438, then input signal y (n) can be output to wave filter 438 by selector 440, then eqalizing cricuit 434 with
Channel estimation module 432 will receive filtered signal z (n).Assuming that estimation result thinks that the degree of multipath effect is not tight
Input signal y (n) is directly output to eqalizing cricuit 434 and channel estimation module 432, closed in fact by weight, the then meeting of selector 440
Wave filter 438.
It refer to shown in Fig. 4 C, it is a block schematic diagram of the receiving terminal 430 of one embodiment of the invention.With Fig. 4 A and figure
4B is compared, and the receiving terminal 430 shown in Fig. 4 C can not include above-mentioned selector 440.Channel estimation module 436 estimates its passage
Survey result and be sent to wave filter 438.The wave filter 438 directly according to channel estimation result export non-filtered signal y (n) or
It is signal z (n) after filtering to eqalizing cricuit 434 and another channel estimation module 432.In another example, the wave filter 438
Its filter effect can also be adjusted to without filter from p (n) according to the channel estimation result that channel estimation module 436 is exported
Ripple.In other words, the result that the wave filter 438 is exported may be non-filtered signal y (n) or signal z after filtering
(n)。
Channel estimation module 432 is then that 438 filtered signal z (n) of wave filter is estimated, or directly to institute
Reception signal y (n) is estimated.The purposes of this channel estimation module 432 then property with the channel estimation module 132 shown in Fig. 1
Matter is suitable with effect, therefore is not added with being described in detail herein.
It refer to shown in Fig. 8 A, it is the effect diagram according to the wave filter of one embodiment of the invention.Work as in Fig. 8 A
In, the multipath effect h (n) for multipath effect h (n) and Fig. 2A that passage 120 has is suitable.Signal is through three different paths logical
Propagated among road 120, signal is all suitable in the propagation energy of every paths.
In this embodiment, the filter effect p (n) of wave filter 438 is set as maintaining the peak value of previous moment, and weakens
The peak value of later moment in time.In other words, its filter effect is received at first by for keeping among the digital signal with multipath effect
The digital signal of the first via arrived, and weaken the digital signal of the non-first via.Or the it can be said that effect of wave filter 438
In the capacity volume variance in widening the reception signal between a first path signal and one second path signal.Therefore, signal y (n)
In the signal that arrives first at will maintain its energy, the signal energy in two later arrived at path will weaken.Transmission end is passed
For the signal x (n) sent, by multipath effect h (n) and filter effect p (n) influence, it would be equivalent to by integral passage
Influence q (n), finally as signal z (n).Compared with without filtering p (n) primary signal y (n), although signal z (n)
It is that there are three paths, but can have separated a predominating path and two secondary paths.
It refer to shown in Fig. 8 B, it is another effect simulation figure according to the wave filter of one embodiment of the invention.Please simultaneously
Pass through multipath effect h (n) and filter effect p (n) influence with reference to figure 8A, signal x (n), be equal to by integral passage
Influence q (n), thus its it is filtered after signal as shown in Figure 8 B, show a higher predominating path of peak value and two be secondary
Want path.
Refer again to shown in Fig. 9, its be according to the signal to noise ratio of the output signal of the eqalizing cricuit 434 of one embodiment of the invention and
Time diagram.Compared with the signal to noise ratio and time diagram of the output signal of the eqalizing cricuit 134 of Fig. 3 prior arts, it will be apparent that can see
Go out eqalizing cricuit 434 and just restrain its signal to noise ratio in a short period of time.Accordingly, the energy of receiving terminal 430 according to an embodiment of the invention
It is enough soon to obtain the signal for possessing enough high s/n ratios, and carry out follow-up interpretation work.
It will be understood by those skilled in the art that arrive, although the multipath effect h (n) that the present invention enumerates is with three phases
When the path of energy is as example, but the form of multipath effect only one kind, there is very more changes.For example, two
The suitable path of energy or the path of four suitable energy, belong to multipath effect.
One of ordinary skill in the art is it will also be appreciated that the filter effect p (n) for the wave filter 438 that the present invention enumerates
There was only one kind among Fig. 8 A.For example, can also be in 2us place in addition to weakening signal peak in 1us place
Weaken signal peak.Or be to weaken signal peak in 0us place, maintain signal peak in 1us place.
Because the change of multipath effect is infinite, the change of filter filtering effect and infinite, therefore both phases
Change after multiplying is also infinite.For miscellaneous multipath effect, receiving terminal 430 can use the filtering of a variety of kenels
Device 438 is dealt with.
It refer to shown in Fig. 5 A, it is a block schematic diagram of a receiving terminal 430 of another embodiment of the present invention.With Fig. 4 A
Receiving terminal 430 compare, difference is that original wave filter 438 with fixed filter effect has changed variable filter effect into
Tunable filter 538.After estimations of the received signal y (n) of receiving terminal 430 by channel estimation module 436, adjustable filter
Ripple device 538 is according to the result of estimation, that is, the degree of multipath effect, accordingly adjusts filter effect p (n).As noted previously, as
The change of multipath effect and filter effect is all infinite, and the change of filter effect is not the emphasis of the present invention, therefore not
Add detailed description.
It refer to shown in Fig. 5 B, it is a block schematic diagram of a receiving terminal 430 of another embodiment of the present invention.With Fig. 5 A
Receiving terminal 430 compare, difference is that the position of selector 440 changes after tunable filter 538 to adjustable filtering
Before device 538.Compared with Fig. 4 B receiving terminal 430, difference is that original wave filter 438 with fixed filter effect changes
Into the tunable filter 538 of variable filter effect.According to the estimation result of channel estimation module 436, selector 440 will input
Signal y (n) is selectively output to eqalizing cricuit 434 or wave filter 538.Assuming that to think that eqalizing cricuit 434 needs adjustable for estimation result
Input signal y (n) is output to tunable filter 538 by the help of wave filter 538, the then meeting of selector 440, then eqalizing cricuit 434
Filtered signal z (n) will be received with channel estimation module 432.Assuming that estimation result thinks the degree of multipath effect not
Seriously, then input signal y (n) can be directly output to eqalizing cricuit 434 and channel estimation module 432 by selector 440, be closed in fact
Tunable filter 538 is closed.Tunable filter 538 is according to the result of estimation, that is, the degree of multipath effect, accordingly adjustment filter
Ripple effect p (n).
It refer to shown in Fig. 5 C, it is a block schematic diagram of a receiving terminal 430 of another embodiment of the present invention.With Fig. 4 C
Receiving terminal 430 compare, difference is that original wave filter 438 with fixed filter effect has changed variable filter effect into
Tunable filter 538.After estimations of the received signal y (n) of receiving terminal 430 by channel estimation module 436, adjustable filter
Ripple device 538 accordingly adjusts filter effect p (n) according to the result of estimation.And the wave filter 438 shown in Fig. 4 B only filters effect
Two kinds of fruit p (n) and zero filter effect, in addition to both, the filter effect p (n) of tunable filter 538 is adjustable.
It refer to shown in Fig. 6 A, it is a block schematic diagram of a receiving terminal 430 of a more embodiment of the invention.In Fig. 5 A
Embodiment among, although tunable filter 538 can deal with the multipath effect of more kenel, tunable filter 538 is set
Meter may be excessively complicated, is not necessarily applied on each application.Therefore, among Fig. 6 A illustrated embodiments, using more
Individual (such as m) wave filter 638-1~638-m is connected in parallel to the receiving end signal y (n) of receiver 430.These wave filters
638-1~638-m output end can be connected to the input of a selector 440.In the present embodiment, first wave filter 638-
1 output signal is z1 (n), second wave filter 638-2 output signal is z2 (n).The rest may be inferred, m-th of wave filter
638-m output signal is zm (n).
Each wave filter 638-1~638-m filtering performance is different from, when channel estimation module 436 is to receiving terminal
Signal y (n) is estimated, and can estimate the multipath effect h (n) among passage 120.According to estimate come result, can be with
Make selector 440 select one of wave filter 638-1~638-m filtering output or reception signal to eqalizing cricuit 434 with
Another channel estimation module 432.
Among Fig. 6 A embodiment, these have wave filter 638-1~638-m of fixed filtering performance for different shaped
The multipath effect of state has preferable filter effect respectively.Its output signal is enabled to make eqalizing cricuit 434 soon converge to letter
Make an uproar than available state.
It refer to shown in Fig. 6 B, it is a block schematic diagram of a receiving terminal 430 of a more embodiment of the invention.With Fig. 6 A
Shown embodiment difference is that the position of selector 440 changes after multiple wave filter 638-1~638-m to more
Before individual wave filter 638-1~638-m.According to channel estimation result, selector 440 can be with multiple wave filter 638-1~638-m
The most suitable wave filter of central selection, the most suitable wave filter is sent to by received signal y (n).Either it will directly be connect
Collection of letters y (n) is sent to eqalizing cricuit 434 and channel estimation module 432.
It refer to shown in Fig. 7, it is a block schematic diagram of the receiving terminal 430 that it is another embodiment of the present invention.With
Fig. 6 parallel connection is compared, and multiple wave filter 738-1~738-2 of Fig. 7 embodiments use the mode concatenated.These wave filters
738-1~738-2 filtering performance can differ, can also be identical.Wave filter 738-1 output is connected to selector 440
An input, and another wave filter 738-2 input.And wave filter 738-2 output is connected to the another of selector 440
One input.
In other words, three inputs of selector 440 are the received signal y (n) of receiving terminal 430, wave filter respectively
738-1 filter result z1 (n) and the wave filter 738-1 and filter result z2 (n) after wave filter 738-2 linear convolutions.
It is identical with Fig. 6, when channel estimation module 436 is estimated receiving end signal y (n), can estimate more among passage 120
Footpath effect h (n).According to estimate come result, selector 440 can be made to select one of input to be output to eqalizing cricuit
434 with another channel estimation module 432.Although only showing the wave filter 738-1 and 738-2 of two concatenations in the figure 7, this
Invention does not limit the wave filter quantity of concatenation.
Complex chart 5A to Fig. 7 embodiment, receiving terminal 430 can use the wave filter of single fixed filter effect,
The wave filter of single individual adjustable filter effect can be used or use multiple wave filters.When receiving terminal 430 uses multiple filtering
During device, these wave filters can be abreast reception signal y (n), or reception signal y (n) after concatenation, press down or be parallel
And concatenation ground reception signal y (n).The selector of the multiple wave filter outputs of receipt of subsequent, then estimated according to channel estimation module 436
The situation of the tunnel condition of survey, particularly multipath effect h (n), appropriate wave filter is selected, with the follow-up eqalizing cricuit 434 of profit very
The signal to noise ratio of its output is restrained soon to available degree.
It will be understood by those skilled in the art that arrive, these embodiments can support the present invention key character it
One.The digital signal namely received to eqalizing cricuit is first filtered.First it is filtered in particular according to channel estimation result,
So that to receive the influence of the multipath effect in digital signal so big unlike script digital signal for eqalizing cricuit, so eqalizing cricuit
Can reduces the time of its signal to noise ratio exported of convergence.Through above-mentioned inventive features, required convergence time can is big
Reduce to amplitude.
It refer to shown in Figure 10, it is the schematic flow sheet according to a method of reseptance of one embodiment of the invention.This figure institute
The method of reseptance of announcement, goes for receiving terminal.One of ordinary skill in the art is referred to the embodiment shown in Fig. 4 A.
First in step 1010, a digital signal is received.Digital signal referred herein, can be the signal y (n) shown in Fig. 4 A.Connect
, among step 1020, channel estimation is carried out to the digital signal received, whether estimation has in the channel imitates by multipath
The distortion answered.
Then according to step 1020 estimate come result, among judgment step 1030, judge whether the passage full
Foot first estimates situation.First estimation situation referred herein, what is referred to can be the multipath effect of a certain type.If step
1030 judge that passage meets the first estimation situation really, then method of reseptance proceeds to step 1040.Among the step 1040, root
The first filter step is carried out to the digital signal received according to the first estimation situation.It is defeated after the first filter step has been carried out
Go out, can then carry out etc. changing step 1050.Accordingly, grade step 1050 can restrain the higher output letter of signal to noise ratio quickly
Number.Assuming that step 1030 judges that the passage is unsatisfactory for the first estimation situation, then method of reseptance, which proceeds to etc., changes step 1050.Allow this
Step 1050 directly carries out etc. changing to the digital signal received.
In the one of the present embodiment implements example, the above-mentioned first estimation situation is not singly to refer to the multipath effect of a certain type
Situation is answered, refers to certain form of multipath effect situation.When step 1020 estimates the multipath effect that passage is these types
Situation, then step 1040 using the first filter step of adjustable effect come the multipath effect situation of these corresponding classifications.This area
Those of ordinary skill be referred to embodiment shown in Fig. 5.
It refer to shown in Figure 11, it is the schematic flow sheet of a method of reseptance of another embodiment of the present invention.This area
Those of ordinary skill is referred to the embodiment shown in Fig. 6 A.Compared with the embodiment shown in Figure 10, when step 1020 is to logical
After road is estimated, step 1130 is proceeded to.Judge which kind of estimation situation the passage meets.Assuming that meet the first estimation feelings
Border, then method of reseptance proceed to step 1140, for received signal carry out the first filter step.Assuming that the passage meets the
Two estimate situations, then method of reseptance proceeds to step 1150.The second filter step is carried out for received signal.
It will be understood by those skilled in the art that arrive, among the embodiment shown in Figure 11, step 1140 and step
1150 filter effect is different, and it corresponds to different estimation situations.In addition, step 1140 can also be same with step 1150
Shi Jinhang, a certain step 1140 or 1150 filtering output is then selected to carry out etc. changing in step 1050.Similarly, it is assumed that step
Rapid 1130 judge that passage is unsatisfactory for first and second estimation situation, then can be general with the embodiment shown in Figure 10, and grade walks
Rapid 1050 directly carry out etc. changing to the digital signal received.
It refer to shown in Figure 12, it is the schematic flow sheet of a method of reseptance of another embodiment of the present invention.This area
Those of ordinary skill is referred to the embodiment shown in Fig. 7.Compared with the method for reseptance shown in Figure 11, embodiment illustrated in fig. 12
Difference is in except carrying out the first filter step 1240 under meeting the first estimation situation, meeting to enter under the second estimation situation
Outside the second filter step of row 1250.Assuming that passage meets under the 3rd estimation situation, then the 3rd filter step can be first carried out
1260.Then, the 4th filter step 1270 exports the filtering carried out again for the 3rd filter step 1260 again.By two
Output signal after secondary filtering, which is then sent through etc., to be changed step 1050 and carries out etc. changing.
In the embodiment shown in fig. 12, the 3rd filter step 1260 can be equal to the first filter step 1240, the 4th filter
Ripple step 1270 can be equal to the second filter step 1250, in other words, can utilize the filter step of two filter effects, meet
Three kinds of different estimation situations.Assuming that having filter step A, B, C of three kinds of different filter effects, then channel estimation can be corresponded to
A situations, b situations, c situations, ab situations, bc situations, ac situations and the abc situations gone out.Those of ordinary skill in the art can be with
Deduce easily, using various filter effects filter step it is parallel with concatenating, cope with many different channel estimation feelings
Border.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not limited to the claim of the present invention.
All other are to meet the equivalent change or modification completed under disclosed spirit, should be included in claims
Within the scope of the profit of application.
Claims (17)
- A kind of 1. reception device for being used for acceleration etc. and changing convergence rate, applied to the receiving terminal of a communicator, the communicator Comprising first device, the reception device includes：One wave filter, it is filtered for a reception signal to reduce its multipath effect, and exports a filtered signal；AndOne channel estimation device, carry out channel estimation for the reception signal of non-filtered processing and produce an estimation according to this to tie Fruit, the estimation result to determine from the reception signal and the filtered signal select one be sent to the eqalizing cricuit.
- 2. reception device as claimed in claim 1, it is characterised in that the filtered signal makes the eqalizing cricuit carry out equalization process Speed accelerate.
- 3. reception device as claimed in claim 1, it is characterised in that the filtering parameter of the wave filter enters according to the estimation result Row adjustment.
- 4. reception device as claimed in claim 1, it is characterised in that also include：One selector, one is selected to be sent to suchization from the reception signal and the filtered signal according to the estimation result Device.
- 5. reception device as claimed in claim 1, it is characterised in that also include：Another wave filter, it is filtered for the reception signal to reduce its multipath effect, and exports another filtered signal, The wherein filtering parameter of another wave filter and the filtering parameter of the wave filter is different；AndOne selector, selected according to the estimation result from the filtered signal, another filtered signal and the reception signal Select one and be sent to the eqalizing cricuit.
- 6. reception device as claimed in claim 1, it is characterised in that also include：Another wave filter, it is filtered for the filtered signal to reduce its multipath effect.
- 7. reception device as claimed in claim 1, it is characterised in that the estimation result is related to the degree of a multipath effect.
- 8. reception device as claimed in claim 7, it is characterised in that when the estimation result represents that the degree of the multipath effect is small When a threshold value, the channel estimation device makes the reception signal be sent to before the eqalizing cricuit without filtering process.
- 9. reception device as claimed in claim 1, it is characterised in that the wave filter is widening one first in the reception signal Capacity volume variance between path signal and one second path signal.
- A kind of 10. method of reseptance for being used for acceleration etc. and changing convergence rate, applied to the receiving terminal of a communicator, the communicator Comprising first device, the method for reseptance includes：A filtering is carried out to reduce its multipath effect for a reception signal, and exports a filtered signal；Channel estimation is carried out for the reception signal of non-filtered processing and produces an estimation result according to this；AndDetermine to select one to be sent to the eqalizing cricuit from the reception signal and the filtered signal according to the estimation result.
- 11. method of reseptance as claimed in claim 10, it is characterised in that the filtered signal makes the eqalizing cricuit carry out etc. at change The speed of reason is accelerated.
- 12. method of reseptance as claimed in claim 10, it is characterised in that carry out a filtering for a reception signal to reduce it The step of multipath effect, it carries out the filtering parameter of the filtering and is adjusted according to the estimation result.
- 13. method of reseptance as claimed in claim 10, it is characterised in that also include：Another filtering is carried out to reduce its multipath effect for the reception signal, and exports another filtered signal, wherein should Filtering is different from the filtering parameter of another filtering；AndOne is selected to transmit from the filtered signal, another filtered signal and the reception signal according to the estimation result To the eqalizing cricuit.
- 14. method of reseptance as claimed in claim 10, it is characterised in that also include：Another filtering is carried out for the filtered signal to reduce its multipath effect.
- 15. method of reseptance as claimed in claim 10, it is characterised in that the estimation result is related to the journey of a multipath effect Degree.
- 16. method of reseptance as claimed in claim 15, it is characterised in that when the estimation result represents the degree of the multipath effect During less than a threshold value, the reception signal is made to be sent to before the eqalizing cricuit without filtering process.
- 17. method of reseptance as claimed in claim 10, it is characterised in that the filtering is widening one first in the reception signal Capacity volume variance between path signal and one second path signal.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101116299A (en) * | 2005-02-11 | 2008-01-30 | Ttpcom有限公司 | Conditioning equaliser input |
| CN101359926A (en) * | 2007-07-31 | 2009-02-04 | 华为技术有限公司 | Receiver, channel estimation method and apparatus |
| CN102299873A (en) * | 2010-06-24 | 2011-12-28 | 创锐讯通讯技术（上海）有限公司 | Physical layer chip in EOC (Ethernet Over Coax) network and realization method thereof |
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| KR20040019499A (en) * | 2002-08-28 | 2004-03-06 | 삼성전자주식회사 | Single carrier receiver having an equalizer capable of improving velocity of equalizing and a method equalizing thereof |
| JP4457657B2 (en) * | 2003-12-10 | 2010-04-28 | 日本電気株式会社 | Equalizer |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101116299A (en) * | 2005-02-11 | 2008-01-30 | Ttpcom有限公司 | Conditioning equaliser input |
| CN101359926A (en) * | 2007-07-31 | 2009-02-04 | 华为技术有限公司 | Receiver, channel estimation method and apparatus |
| CN102299873A (en) * | 2010-06-24 | 2011-12-28 | 创锐讯通讯技术（上海）有限公司 | Physical layer chip in EOC (Ethernet Over Coax) network and realization method thereof |
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