CN106559369A - Sequence estimation device and sequence estimation method - Google Patents
Sequence estimation device and sequence estimation method Download PDFInfo
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- CN106559369A CN106559369A CN201510629733.6A CN201510629733A CN106559369A CN 106559369 A CN106559369 A CN 106559369A CN 201510629733 A CN201510629733 A CN 201510629733A CN 106559369 A CN106559369 A CN 106559369A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L25/03178—Arrangements involving sequence estimation techniques
- H04L25/03331—Arrangements for the joint estimation of multiple sequences
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03878—Line equalisers; line build-out devices
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
The present invention proposes a kind of sequence estimation device, includes a grouped element, for receiving one first many equalizing signals, according to a rule of classification, more than first equalizing signal is grouped into multigroup equalizing signal；One sequence estimation unit, it is coupled to the grouped element, for according to sequence estimation rule, multigroup equalizing signal is processed respectively, to obtain multigroup estimation signal, and an assembled unit respectively, the sequence estimation unit is coupled to, for according to the rule of classification, multigroup estimation signal being ordered as multiple estimation signals.
Description
Technical field
The present invention refers to a kind of apparatus and method of sequence estimation, and espespecially can to reduce error propagation multiple with low for one kind
The sequence estimation device of miscellaneous degree and sequence estimation method.
Background technology
Image broadcast standard includes advanced television system committee (the advanced television in the U.S.
System committee, ATSC), Europe digital video broadcast-terrestrial (digital video
Broadcasting-terrestrial, DVB-T), Japan terrestrial integrated digital broadcast service (integrated
Services digital broadcasting-terrestrial, ISDB-T), and the ground digital multimedia of China
The standards such as broadcast (digital terrestrial multimedia broadcast, DTMB).In digital communication system
In system, when signal is transmitted by wireless channel, multipath attenuation (multi-path fading) can be subject to
Impact, and then produce symbol intersymbol interference (inter-symbol interference, ISI), be difficult to receiving terminal
Correctly recovering signal.In order to eliminate symbol intersymbol interference, receiving terminal would generally arrange balanced device (equalizer)
And sequence estimation device come estimate transmit signal.
Common balanced device includes linear feed-forward balanced device (linear feedforward equalizer, LE)
And decision feedback equalizer (decision feedback equalizer, DFE).However, linear feed-forward is balanced
Utensil has the shortcomings that enhancing noise (noise), and decision feedback equalizer then has error propagation (error
Propagation shortcoming).That is, when decision error, decision feedback equalizer can be according to mistake
Decision-making docking collect mail and number carry out equilibrium, and then reduce the efficiency of balanced device, and produce more erroneous decisions.
On the other hand, sequence estimation device can be according to the sequence group for receiving signal and all possible transmission signal
Close, then select most possible signal combination.However, when symbol intersymbol interference across the more (example of symbol number
As channel length it is longer) or transmission signal modulation current potential (modulation level) it is higher when, sequence is estimated
The computation complexity of counter device can be incremented by with exponential form.Rough says, when transmission signal symbol is M ranks
(M-ary), when modulation and channel length are L, complexity level is ML.For example, in ground digital
In multimedia broadcasting standards, M can be 32, even if L is only 5, the complexity level of sequence estimation device is about
For 325, such complexity can produce sizable power consumption.
Therefore, the complexity for how solving error propagation and reducing sequence estimation device is urgently to be resolved hurrily asking
Topic.
The content of the invention
Therefore, the main object of the present invention is to provide a kind of sequence estimation device and sequence estimation method,
To solve the above problems.
A kind of sequence estimation device of present disclosure, comprising a grouped element, for receiving more than one first
Weighing apparatus signal, according to a rule of classification, more than first equalizing signal is grouped into multigroup equalizing signal；One
Sequence estimation unit, is coupled to the grouped element, for according to sequence estimation rule, processing this respectively many
Group equalizing signal, to obtain multigroup estimation signal, and an assembled unit respectively, is coupled to the sequence estimation
Unit, for according to the rule of classification, multigroup estimation signal being ordered as multiple estimation signals.
The present invention separately discloses a kind of sequence estimation method, and for a sequence estimation device, the method includes to be made
One first many equalizing signals are received with a grouped element, with according to a rule of classification, by this more than first
Equalizing signal is grouped into multigroup equalizing signal；According to sequence estimation rule, come using a sequence estimation unit
Multigroup equalizing signal is processed respectively, to obtain multigroup estimation signal respectively, and according to the rule of classification,
Multigroup estimation signal is ordered as into multiple estimation signals using an assembled unit.
Description of the drawings
It is that the above objects, features and advantages of the present invention can be become apparent, below in conjunction with accompanying drawing to this
Bright specific embodiment elaborates, wherein：
Schematic diagrames of the Fig. 1 for one communication system of the embodiment of the present invention.
Schematic diagrames of the Fig. 2 for one sequence estimation device of the embodiment of the present invention.
Schematic diagrames of the Fig. 3 for one sequence estimation device of the embodiment of the present invention.
Schematic diagrames of the Fig. 4 for one flow process of the embodiment of the present invention.
Component label instructions in figure：
10 communication systems
20th, 30 sequence estimation device
200 grouped elements
202nd, 302 equalizer module
204th, 304 sequence detection module
220 assembled units
240 processing units
300 feed forward equalizers
320 feedback equalizers
340 decision packages
Ffe_out, fbe_out, dec_est_w weighted signal
Seu_1～seu_N sequence estimation units
Sig_in signals
Sig_est, seu_out_1～seu_out_N estimates signal
Dec_in, p_out, gp_sig_1～equalizing signal
gp_sig_N
Dec_est determines signal
40 flow processs
400th, 402,404,406,408 step
Specific embodiment
Refer to Fig. 1, schematic diagrames of the Fig. 1 for one communication system 10 of the embodiment of the present invention.Communication system 10
Can be any use single carrier (single-carrier) technology or OFDM (orthogonal
Frequency-division multiplexing, OFDM) technology communication system, be briefly by a transmission
An end TX and receiving terminal RX is constituted.In FIG, transmission end TX and receiving terminal RX are for illustrating
The framework of communication system 10.For example, communication system 10 can be Asymmetric Digital Subscriber Line
(asymmetric digital subscriber line, ADSL) system and power communication (power line
Communication, PLC) line communication system such as system, or area wireless network (wireless local
Area network, WLAN), digital ground multimedia broadcast (digital terrestrial multimedia
Broadcast, DTMB) system and advanced Long Term Evolution (Long Term Evolution-advanced, LTE-A)
The wireless telecommunication systems such as system.Additionally, transmission end TX and receiving terminal RX may be disposed at mobile phone, pen
In remembering the devices such as this computer, panel computer, e-book and portable computer system, not limited to this.
Refer to Fig. 2, schematic diagrames of the Fig. 2 for one sequence estimation device 20 of the embodiment of the present invention, for Fig. 1
Receiving terminal RX in, for estimate transmit signal.Sequence estimation device 20 includes an equalizer module
202 and a sequence detection module 204.Sequence detection module 204 includes a grouped element 200, Duo Gexu
Row estimation unit seu_1～seu_N and an assembled unit 220.Specifically, grouped element 200 can be used to
Multiple equalizing signal p_out are received, according to a rule of classification, multiple equalizing signal p_out to be grouped into many
Group equalizing signal gp_sig_1～gp_sig_N.Multiple sequence estimation unit seu_1～seu_N, are coupled to point
Group unit 200, can be used to according to a sequence estimation rule, process respectively multigroup equalizing signal gp_sig_1～
Gp_sig_N, to obtain (such as reduce) multigroup estimation signal seu_out_1～seu_out_N respectively.Group
Unit 220 is closed, multiple sequence estimation unit seu_1～seu_N are coupled to, for according to the rule of classification,
Multigroup estimation signal seu_out_1～seu_out_N is ordered as into multiple estimation signal sig_est.More clearly
Say, assembled unit 220 can be according to a rule of combination for corresponding to the rule of classification, by multigroup estimation signal
Seu_out_1～seu_out_N is ordered as multiple estimation signal sig_est.Therefore, receiving terminal RX can basis
Multiple estimation signal sig_est, perform decision-making running, further to obtain transmitted bit signal.
The embodiment of sequence detection module 204 has many kinds.For example, in order to reduce Sequence Detection mould
The complexity of block 204, can include for the rule of classification in grouped element 200 makes multigroup equalizing signal
In each group of equalizing signal of gp_sig_1～gp_sig_N, the index distance of adjacent equalizing signal is all identical.
That is, multiple equalizing signal p_out can be divided into uniformly and in order multigroup signal.For multiple sequences
Sequence estimation rule in row estimation unit seu_1～seu_N can be maximum-likelihood sequence estimation
(maximum-likelihood sequence estimation, MLSE) rule.Additionally, realizing maximum seemingly
So the method for sequence estimation rule has many kinds.For example, multiple sequence estimation unit seu_1～seu_N
Executable Viterbi (Viterbi) algorithm is regular to realize maximum-likelihood sequence estimation, processes multigroup equal
Weighing apparatus signal gp_sig_1～gp_sig_N, with obtain (such as reduce) multigroup estimation signal seu_out_1～
seu_out_N.Therefore, sequence detection module 204 not only can obtain institute according to multiple estimation signal sig_est
The bit signal of transmission, more can be separated into multiple tools by the sequence estimation unit by with lot of complexity
There is the sequence estimation unit seu_1～seu_N of lower complexity, reduce the effect of complexity.
In addition, in order to mitigate the problem of error propagation (error propagation), sequence detection module
204 can additionally comprise a processing unit 240, be coupled to grouped element 200, for receiving multiple equalizing signals
Dec_in (such as through receiving signal in a balanced way), with according to multiple equalizing signal dec_in and multiple relative
The estimation signal dec_est_w of the weighting answered, produces multiple equalizing signal p_out.That is, sequence inspection
Module 204 is surveyed before equalizing signal is supplied to grouped element, these can be first processed and be changed signal, for dropping
Low error propagation, to avoid error propagation from reducing the efficiency of sequence estimation unit seu_1～seu_N.
Equalizer module 202, is coupled to processing unit 240, can be used to receive multiple signal sig_in (for example
Fundamental frequency receive signal), with by multiple signal sig_in equilibrium as multiple equalizing signal dec_in, and generation
The estimation signal dec_est_w of multiple corresponding weightings.Wherein, multiple signal sig_in can be according to ground
DMB standard come multiple single carriers (single-carrier) signal that transmits, or according to other nothings
The signal transmitted by line communication standard, not limited to this.Additionally, multiple signal sig_in can include frame (frame)
And the frame header (frame header) of next frame.That is, sequence estimation device 20 can be used simultaneously
Header in multiple frames is improving the estimation efficiency of single frame.
Therefore, sequence estimation device 20 error propagation is mitigated and can reduce realizing maximum-likelihood sequence estimation
In the case of the complexity of rule, transmission signal is estimated.If additionally, transmission signal have it is encoded (for example
Error correcting code), sequence estimation device 20 can further provide for estimating that signal, to decoder, is estimated to decode
Meter signal.
Refer to Fig. 3, schematic diagrames of the Fig. 3 for one sequence estimation device 30 of the embodiment of the present invention, for Fig. 1
Receiving terminal RX in, for further illustrating the function mode of Fig. 2.Sequence estimation device 30 includes one
Equalizer module 302 and a sequence detection module 304.The running of sequence estimation device 30 for convenience of description
Mode, equalizer module 302 can be a decision feedback (decision feedback) balance module, but not limit
In this.The function and function mode of sequence detection module 304 refer to the explanation of sequence detection module 204,
Will not be described here.
Specifically, equalizer module 302 includes feed forward equalizer (feedforward equalizer, FFB)
300th, feedback equalizer (feedback equalizer, FBE) 320, decision package (decision device)
340 and adder 360, wherein feed forward equalizer 300 and feedback equalizer 320 include respectively it is multiple before
Feedback equaliser weights and multiple feedback equalizer weights, can be used to balanced its input signal.That is, front
Feedback balanced device 300 can be according to multiple signal sig_in (such as fundamental frequency reception signal) and multiple feed forward equalizers
Weight, produces multiple feedforward weighted signal ffe_out.Feedback equalizer 320 is coupled to decision package 340,
Multiple feedbacks can be produced according to multiple corresponding decision signal dec_est and multiple feedback equalizer weights
Weighted signal fbe_out.Adder 360 is coupled to feed forward equalizer 300 and feedback equalizer 320, can root
According to multiple feedforward weighted signal ffe_out and multiple feedback weight signal fbe_out, multiple equalizing signals are produced
Dec_in (such as dec_in=ffe_out+fbe_out).Decision package 340 is coupled to adder 360, according to
Multiple equalizing signal dec_in produce (such as by solving modulation) multiple corresponding decision signal dec_est.
In one embodiment, adder 360 and the coupling of feed forward equalizer 300 and feedback equalizer 320 are coupled to
In the adder 360 of decision package 340 can be identical adder.
Additionally, equalizer module 302 can be according to the feedback equalizer of the maximum in multiple feedback equalizer weights
Weight fbe_w_max and multiple corresponding decision signal dec_est, produce multiple corresponding weightings
Estimate signal dec_est_w (such as dec_est_w=fbe_w_max*dec_est).Equalizer module 302
Further according to multiple equalizing signal dec_in and multiple corresponding decision signal dec_est can produce one and miss
Difference.The error amount can be used to adjust (and amendment) the plurality of feed forward equalizer weight and the plurality of feedback is equal
Weighing apparatus weight, will not be described here.
In accordance with the above, an embodiment is provided further below, for clearly stating between signal and weight
Relation.Equalizer module 302 is first according to multiple signal yn(such as the sig_in in Fig. 3), produces many
Individual equalizing signal zn(such as the dec_in in Fig. 3) and the estimation signal of multiple corresponding weightings
(such as the dec_est_w in Fig. 3), whereinIt is corresponding decision signal (such as in Fig. 3
Dec_est), bk'For feedback equalizer weight, k ' is time index for the index and n of feedback equalizer weight.
Feedback equalizer weight can include b1、b2、...、bn-1、bn, wherein h is exponent number (tap).It is false
If bkFor all feedback equalizer weights b1、b2、...、bn-1、bnThe feedback equalizer of middle maximum intensity
Weight, k are its index.In order to mitigate the problem of the error propagation that balance module may be produced, sequence inspection
The processing unit 240 surveyed in module 304 can be according to multiple equalizing signal znAnd multiple corresponding weightings are estimated
Meter signalProduce multiple equalizing signal rn(such as the p_out in Fig. 3).Produce multiple equilibriums
Signal rnMethod have many kinds, for example, can be according to equationTo produce rn,
But not limited to this.Multiple equalizing signal rnR can be included0、r1、r2、...、rk、rk+1、rk+2、...。
To multiple equalizing signal rnBefore being estimated, in order to reduce the complexity of sequence detection module 304,
Grouped element 200 can be according to rule of classification, by multiple equalizing signal rnIt is divided into k group equalizing signals (for example to scheme
Gp_sig_1～gp_sig_k in 3).For example, grouped element 200 can be according to corresponding to the anti-of maximum
The index k of feedback equaliser weights, by equalizing signal rnIt is divided into k groups, and makes each group after packet balanced letter
In number, the index distance of adjacent equalizing signal is all k.Specifically, the 1st group of equalizing signal be (for example
Gp_sig_1 equalizing signal r can be included)0、rk、r2k、r3k..., the 2nd group of equalizing signal is (for example
Gp_sig_2 equalizing signal r can be included)1、rk+1、r2k+1、r3k+1..., by that analogy, kth group is equal
Weighing apparatus signal (such as gp_sig_k) can include equalizing signal rk-1、r2k-1、r3k-1、r4k-1、....In
In one embodiment, grouped element 200 can include a buffer storage and a Memory Controller, and multiple equal
Weighing apparatus signal rnSequentially it is stored in the buffer storage, and Memory Controller can be according to each equalizing signal
rnThe address deposited, assert the index of each equalizing signal, and then by equalizing signal
r0、rk、r2k、r3k... divide to the 1st group of equalizing signal (such as gp_sig_1), by equalizing signal
r1、rk+1、r2k+1、r3k+1... point to the 2nd group of equalizing signal (such as gp_sig_2), by that analogy.
Then, multiple sequence estimation unit seu_1～seu_k (for example can lead to according to sequence estimation rule respectively
Cross and realize Viterbi algorithm), the k group equalizing signals after packet are estimated, to obtain (for example also
It is former) the corresponding estimation signal of k groups(such as seu_out_1～seu_out_k in Fig. 3).Come in detail
Say, sequence estimation unit seu_1 can process the 1st group of equalizing signal r0、rk、r2k、r3k..., to obtain
(for example reducing) the 1st group of corresponding estimation signal(such as in Fig. 3
seu_out_1).Sequence estimation unit seu_2 can process the 2nd group of equalizing signal
r1、rk+1、r2k+1、r3k+1..., to obtain (such as reduce) the 2nd group of corresponding estimation signal(such as seu_out_2 in Fig. 3), by that analogy, sequence estimation
Unit seu_k can process kth group equalizing signal rk-1、r2k-1、r3k-1、r4k-1..., to obtain (example
As reduced) the corresponding estimation signal of kth group(such as Fig. 3
Middle seu_out_k).In another embodiment, multiple sequence estimation unit seu_1～seu_k are in practice
Can be realized by the single Digital Logical Circuits for realizing Viterbi algorithm, the single Digital Logical Circuits
The k group equalizing signals are processed sequentially respectively at the different periods, sequentially to obtain (such as reduce) the k groups
Corresponding estimation signal.
After completing packet signal and estimating, assembled unit 220 can sort the corresponding estimation signal of k groups,
To obtain corresponding to multiple signal ynEstimation signal(such as in Fig. 3
sig_est).In an embodiment, assembled unit 220 can be controlled with a memory comprising a buffer storage
Device, and multiple signal ynEstimation signal sequentially deposited into the buffer storage, more particularly, deposit
Memory controller can demarcate the address for estimating that signal is deposited according to each index for estimating signal, and then will
Estimate signalIt is stored in this
In buffer storage in the corresponding address of sequential, last assembled unit 220 will estimate signal againSequentially export.
Therefore, by grouped element 200, sequence estimation unit seu_1～seu_k and assembled unit 220
Operate, sequence detection module 304 will be separated into k groups with high complicated estimation computing and have low complex degree
Estimate computing, can reach reduces the effect of complexity.
It is noted that the implementation of the above grouped element, sequence estimation unit and assembled unit can
There are many kinds.In one embodiment, multiple sequence estimation units can be integrated into unique sequence estimation unit, by
The sequence estimation unit processes multigroup equalizing signal respectively in different periods.Additionally, grouped element, sequence are estimated
Meter unit and assembled unit can be with ASIC (Application-Specific Integrated
Circuit, ASIC) realizing, i.e., grouped element, sequence estimation unit and assembled unit can be implemented respectively
For packet circuit, sequence estimation circuit and combinational circuit.
The running of foregoing sequences detection module (such as sequence detection module 204 and sequence detection module 304)
Mode, can further be summarized as a flow process 40, as shown in Figure 4.Flow process 40 is comprised the steps of：
Step 400：Start.
Step 402：Multiple equalizing signals are received using a grouped element, according to a rule of classification, to incite somebody to action
The plurality of equalizing signal is grouped into multigroup equalizing signal.
Step 404：According to sequence estimation rule, this is processed respectively using a sequence estimation unit multigroup
Equalizing signal, to obtain multigroup estimation signal respectively.
Step 406：According to the rule of classification, using an assembled unit, multigroup estimation signal is ordered as
Multiple estimation signals.
Step 408：Terminate.
In flow process 40, sequence detection module can receive multiple equalizing signals using a grouped element, with
According to a rule of classification, multiple equalizing signals are grouped into into multigroup equalizing signal, and according to a sequence estimation
Rule, processes multigroup equalizing signal respectively using a sequence estimation unit, to obtain respectively (such as reduce)
Multigroup estimation signal.Then, sequence detection module can will many using an assembled unit according to the rule of classification
Group estimates that signal is ordered as multiple estimation signals.
Flow process 40 is the function mode for illustrating sequence detection module, describes in detail and changes before referring to
State, do not repeat in this.
In sum, the present invention provides a kind of sequence estimation device and method, for estimating to transmit signal.Sequence
Row estimation unit includes equalizer module and sequence estimation module, can be in low error propagation and low complex degree
In the case of, obtain and estimate signal.
Although the present invention is disclosed as above with preferred embodiment, so which is not limited to the present invention, Ren Heben
Art personnel, without departing from the spirit and scope of the present invention, when a little modification and perfect can be made,
Therefore protection scope of the present invention is when by being defined that claims are defined.
Claims (16)
1. a kind of sequence estimation device, includes：
One grouped element, for receiving one first many equalizing signals, with according to a rule of classification, by this
More than one equalizing signal is grouped into multigroup equalizing signal；
One sequence estimation unit, is coupled to the grouped element, for according to sequence estimation rule, locating respectively
Multigroup equalizing signal is managed, to obtain multigroup estimation signal respectively, and
One assembled unit, is coupled to the sequence estimation unit, for according to the rule of classification, this multigroup is estimated
Meter signal is ordered as multiple estimation signals.
2. sequence estimation device as claimed in claim 1, it is characterised in that the rule of classification includes to be made
In each group of equalizing signal of multigroup equalizing signal, the index distance of adjacent equalizing signal is all identical.
3. sequence estimation device as claimed in claim 1, it is characterised in that the sequence estimation rule is
Maximum-likelihood sequence estimation (maximum-likelihood sequence estimation, MLSE) rule.
4. sequence estimation device as claimed in claim 3, it is characterised in that every in the sequence estimation unit
One sequence estimation unit performs a Viterbi (Viterbi) algorithm, with according to the maximum-likelihood sequence estimation
Rule, processes multigroup equalizing signal respectively, to obtain multigroup estimation signal respectively.
5. sequence estimation device as claimed in claim 1, also includes：
One processing unit, is coupled to the grouped element, for receiving one second many equalizing signals, with basis
More than second equalizing signal and the estimation signal of multiple corresponding weightings, produce this more than first balanced letters
Number；And
One equalizer module, is coupled to the processing unit, for receiving multiple signals, by the plurality of signal
Balanced is more than second equalizing signal, and the estimation signal for producing the plurality of corresponding weighting.
6. sequence estimation device as claimed in claim 5, it is characterised in that the plurality ofization device module is included
There is a feedback equalizer, which includes multiple feedback equalizer weights, and the plurality ofization device module according to this
The feedback equalizer weight of a maximum and multiple corresponding decision signals in multiple feedback equalizer weights, produce
The estimation signal of the plurality of corresponding weighting of life.
7. sequence estimation device as claimed in claim 5, it is characterised in that the plurality of signal is according to
T-DMB (digital terrestrial multimedia broadcast, DTMB) standard is come
Multiple single carriers (single-carrier) signal of transmission.
8. sequence estimation device as claimed in claim 5, it is characterised in that the plurality of signal includes
One frame header of frame and a next frame.
9. a kind of sequence estimation method, for a sequence estimation device, the method is included：
One first many equalizing signals are received using a grouped element, with according to a rule of classification, by this
More than one equalizing signal is grouped into multigroup equalizing signal；
According to sequence estimation rule, multigroup equalizing signal is processed using a sequence estimation unit respectively,
To obtain multigroup estimation signal respectively, and
According to the rule of classification, multigroup estimation signal is ordered as into multiple estimation letters using an assembled unit
Number.
10. method as claimed in claim 9, it is characterised in that the rule of classification includes makes this multigroup
In each group of equalizing signal of weighing apparatus signal, the index distance of adjacent equalizing signal is all identical.
11. methods as claimed in claim 9, it is characterised in that the sequence estimation rule is a maximum likelihood
Sequence estimation (maximum-likelihood sequence estimation, MLSE) rule.
12. methods as claimed in claim 11, it is characterised in that according to the sequence estimation rule, use
The sequence estimation unit processing multigroup equalizing signal respectively, to obtain multigroup step for estimating signal respectively
Suddenly, include：
A Viterbi (Viterbi) algorithm is performed, with according to the maximum-likelihood sequence estimation rule, difference
Multigroup equalizing signal is processed, to obtain multigroup estimation signal respectively.
13. methods as claimed in claim 9, also include：
One second many equalizing signals are received using a processing unit, with according to more than second equalizing signal
And the estimation signal of multiple corresponding weightings, produce more than first equalizing signal；And
Multiple signals are received using an equalizer module, with by the plurality of signal equalization as this more than second
Weighing apparatus signal, and the estimation signal for producing the plurality of corresponding weighting.
14. methods as claimed in claim 13, it is characterised in that received using the plurality ofization device module
The plurality of signal, and produces the plurality of phase with by the plurality of signal equalization as more than second equalizing signal
The step of estimation signal of corresponding weighting, include：
According to the feedback equalizer weight of a maximum in multiple feedback equalizer weights and it is multiple it is corresponding certainly
Determine signal, produce the estimation signal of the plurality of corresponding weighting.
15. methods as claimed in claim 13, it is characterised in that the plurality of signal is according to a ground number
Word multimedia broadcasting (digital terrestrial multimedia broadcast, DTMB) standard is transmitting
Multiple single carrier (single-carrier) signals.
16. methods as claimed in claim 13, it is characterised in that the plurality of signal includes a frame and one
One frame header of next frame.
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| CN110166061A (en) * | 2019-06-03 | 2019-08-23 | 天津大学 | A kind of selective protection method based on Viterbi decoder |
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| CN110166061B (en) * | 2019-06-03 | 2021-06-08 | 天津大学 | Selective protection method based on Viterbi decoder |
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