CN103259572A - A signal processing unit employing diversity combining and a method for operation a receiving device - Google Patents

A signal processing unit employing diversity combining and a method for operation a receiving device Download PDF

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CN103259572A
CN103259572A CN2013100494971A CN201310049497A CN103259572A CN 103259572 A CN103259572 A CN 103259572A CN 2013100494971 A CN2013100494971 A CN 2013100494971A CN 201310049497 A CN201310049497 A CN 201310049497A CN 103259572 A CN103259572 A CN 103259572A
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reception signal
impulse response
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CN103259572B (en
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拉纳·阿梅德·萨利姆
本·艾特尔
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Sony Corp
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Abstract

The invention relates to a signal processing unit employing diversity combining and a method for operation a receiving device. The receiving device receives transmission signals through a plurality of transmission channels, wherein each transmission channel is described through its channel impulse response. An estimator unit (120) estimates the channel impulse response with respect to each transmission channel from a plurality of received signals through use of cross-correlated blind channel estimation algorithm. Cross-correlation is obtained from sampling values of the received signals. A combining unit (130) combines the received signals based on a combining coefficient obtained from the estimated channel impulse response of a pre-selected diversity combining scheme so that combined received signals are obtained. The receiving device employs blind diversity combining of only one demodulator unit (180) required by the combined received signals. The diversity combining requires not demodulated received signals.

Description

Adopt the diversity signal processing unit that merges and the method for operating acceptor device
Technical field
Embodiments of the present invention relate to the signal processing unit that adopts diversity to merge.Other execution modes relate to the method for the acceptor device of operating electronic equipment.
Background technology
Thereby electronic equipment can be provided with a plurality of reception antennas and realize that diversity merge for example EGC(equal gain combining) the MRC(maximum ratio merges) or switch resident merging as SSC() the merging of SC(selecting type) method.Diversity merges the channel condition information that depends on the emission attribute of describing each emission channel.For example, recently obtain the amplitude of each emission channel and/or the understanding of phase information from the demodulated received signal mutually by the training signal that will in receiving signal, comprise and the reference information (for example, reference signal) that can use at receiver-side.
The signal processing unit that the purpose of this invention is to provide the employing diversity merging of cost savings.This purpose realizes by the theme of independent claims.Describe execution mode in addition in the dependent claims in detail.Details of the present invention and advantage will become apparent from the description to execution mode below in conjunction with accompanying drawing.
Summary of the invention
The invention provides a kind of signal processing unit, comprise: estimator, be configured to estimate to launch based on the blind Channel Estimation algorithm that utilizes the cross-correlation between the paired reception signal from a plurality of reception signals the channel impulse response of channel, wherein each reception signal is assigned to another in the emission channel, and merge cells, obtain to merge the reception signal thereby be configured to merge the reception signal based on the merge coefficient that draws from estimated channel impulse response.
The present invention also provides a kind of integrated circuit that comprises above-mentioned signal processing unit.
The present invention also provides a kind of electronic equipment, comprising: above-mentioned signal processing unit; And a plurality of tuner circuits, each tuner circuit is configured to be tuned to carrier frequency and the output analog receiving signal that transmits, and wherein each analog receiving signal is assigned to one that launches in the channel
The present invention also provides a kind of method of operating acceptor device, method comprises: use estimation unit to estimate to launch the channel impulse response of channel based on the blind Channel Estimation algorithm that utilizes the cross-correlation between the paired reception signal from a plurality of reception signals, wherein each receives signal and is assigned in the emission channel another, thereby and uses merge cells to merge based on the merge coefficient that draws from estimated channel impulse response to receive signal and obtain to merge and receive signal.
The present invention also provides a kind of signal processing unit, comprise: estimator means, for the channel impulse response of estimating to launch channel from a plurality of reception signals based on the blind Channel Estimation algorithm that utilizes the cross-correlation between the paired reception signal, wherein each reception signal is assigned to another in the emission channel, and merging device, obtain to merge the reception signal thereby be used for merging the reception signal based on the merge coefficient that draws from estimated channel impulse response, the input that merges device is electrically connected to the output of estimator means.
Description of drawings
Fig. 1 is the schematic block diagram for the acceptor device of discussing the employing diversity merging that can be used for understanding background information of the present invention.
Fig. 2 A is the schematic block diagram according to the electronic equipment that comprises a plurality of tuner circuits of the execution mode that relates to wireless communication system.
Fig. 2 B is the schematic block diagram according to the electronic equipment that comprises a plurality of tuner circuits of the execution mode that relates to wired communication system.
Fig. 3 A is the schematic block diagram according to the acceptor device of the employing diversity merging of the execution mode of the cost function that relates to the time domain guiding.
Fig. 3 B shows the schematic block diagram of details of signal processing unit of the acceptor device of Fig. 3 A.
Fig. 3 C is the flow chart of simplification that uses the method for the acceptor device that diversity merges according to the operation of in addition execution mode.
Embodiment
Embodiments of the present invention have below been described.The execution mode of describing can merge with any method, namely do not exist to the execution mode of some description may not with other restrictions that merges mutually.Spread all over the identical reference number of accompanying drawing and represent same or analogous key element.Under the condition that does not depart from scope of the present invention, can utilize other execution modes and can carry out the change of structure and logic.Following detailed description should not be considered to restriction, and scope of the present invention is defined by claims.
Fig. 1 is used for providing the understanding to the background of present embodiment.Suppose the s emission signal s (t) on 902 modulated carrier signals of broadcasting station and launch the signal of modulation by emitter antenna 904, a plurality of the receive signals modulated of acceptor device 900 in M receiving element 905 of for example antenna that adopt diversity to merge so, wherein each receiving element 905 is connected in M the tuner circuit 908 one.Tuner circuit 908 be tuned to broadcasting station 902 emission s emission signal s (t) via same channel or carrier signal.Each M receiving element and tuner circuit 908 are via dividing other emission channel to receive s emission signal s (t).Each emission channel is all by its channel impulse response h i(t) describe, wherein i=1,2 ... M.Each tuner circuit 908 is assigned to RX path and output analog receiving signal r i(t), each analog receiving signal r wherein i(t) be assigned to M of launching in the channel.N wherein i(t) be illustrated on the corresponding emission channel and the noise in corresponding tuner circuit 908, equation (1) receives signal r with each i(t) be described as for the time become the s emission signal s (t) of emission channel, corresponding channel transfer function h i(t) and corresponding additive channel noise n i(t) function:
（1）r i(t)=s(t)*h i(t)+n i(t)
In each RX path, A/D(mould/number) converter unit 901 sampled analog receive signal ri (t) thereby obtaining numeral (sampling) receives signal r i(nTA).In each RX path, first demodulator 940 receives signal r with corresponding sampling on time and frequency i(nTA) synchronously and extract training signal (pilot tone) thus obtain channel information about corresponding emission channel.For example, each first demodulator 940 recently obtains corresponding channel impulse response h mutually by the training symbol that will extract and the reference symbol that can use at receiver-side i(t) estimation.Receive signal r for each i(t), different launch scenario needs dissimilar DEMA-1, the DEMB-1 of demodulator 940.
Based on to channel impulse response h i(nTA) understanding, diversity merge cells 950 are determined to receive signal r for each sampling i(nTA) merge coefficient Group (vector).Diversity merge cells 950 uses merge coefficient Come weighting or filtering sampling to receive signal r i(nTA) or from this sampling receive the signal that signal draws, thereby and subsequently the reception signal of weighting or filtering is merged each other and obtain expression the merging of the estimation of s emission signal s (t) is received signal y A(nTA), y B(nTA).Different launch scenarios may need dissimilar diversity merge cellses 950.
Provide and to have received signal y with merging A(nTA), y B(nTA) synchronous and demodulation merges reception signal y A(nTA), y B(nTA) at least one second demodulator 980 of pay(useful) load part.For example, second demodulator 980 provides solution mapping and decoding according to the launch scenario that is used by broadcasting station 902 or emission standard.Second demodulator 980 can also comprise the subelement of correcting for bit-errors and the subelement that is exclusively used in broadcasting station 902 applied emission standards.Different launch scenarios may need dissimilar DEMA-2, the DEMB-2 of second demodulator 980.
Diversity merge cells 950 is based on corresponding reception signal r i(nT A) determine merge coefficient
Figure BDA00002831158600043
Method depend on concrete folding.For example, for the MRC method, the coefficient of estimation Depend on corresponding SNR(signal to noise ratio).For EGC, receiving signal by before with the identical gain addition, receive signal phase place adjustment.For SC, can be with of receiving in the signal, one that for example has optimum SNR is chosen as expression to the signal of the optimal estimation of s emission signal s (t).For SSC, with the reception signal of before having selected remain optimal estimation up to its SNR be reduced to be lower than predetermined threshold till.
If know channel impulse response h at receiver-side i(t), and hypothesis receive additivity (additive) the white Gaussian noise n that signal is subjected to having zero mean i(t) upset, and n i(t) and n k(t) normally add up independently for i ≠ k, in other words E[n i(t) n k(t)]=E[n i(t)] E[n k(t)]=0, for MRC, merge coefficient
Figure BDA00002831158600051
Can determine according to equation (2a):
（2a） ( MRC ) : c → i = h → i *
Consequent merging receives signal y (t) and is provided by formula (2b).
（2b） ( MRC ) : y ( t ) = Σ i = 1 N ( | h → i | 2 s ( t ) + h → i * n i ( t ) )
For EGC, equation (3a) has provided estimated coefficient
Figure BDA00002831158600054
And equation (3b) has provided and merge to have received signal y (t), wherein in equation (3a)
Figure BDA00002831158600055
Item is vector:
（3a） ( EGC ) : c → i = e - j θ i
（3b） ( EGC ) : y ( t ) = Σ i = 1 N ( | h → i | s ( t ) + e - j θ i n i ( t ) )
Equation (2a) and (3a) show merge coefficient
Figure BDA00002831158600058
Calculating need be to the h of corresponding channel impulse response i(t) understanding, but usually channel impulse response by demodulation at least each part that comprises training symbol that receives signal obtain.Therefore, each receive signal before can merging these signals at least by partly demodulation.
Fig. 2 A relates to about the embodiments of the present invention of wireless communication system and shows be used to the electronic equipment 200 that receives communication data independently (for example, call or for example the broadcasting data of TV programme or radio programs).Electronic equipment 200 can be for example radio devices, television set, set-top box or have broadcast receiver or the static equipment of television receiver capable computer equipment.According to another execution mode, electronic equipment 200 is mobile devices of mobile phone, personal digital assistant, mobile broadcast receiver or mobile television unit for example, and wherein mobile device can be handheld device or be placed on the vehicle/interior equipment.Electronic equipment 200 can comprise that a plurality of antennas that are used for receiving electromagnetic radiation that suitably separate are with as receiving element 205.Antenna can be arranged on the different surfaces or in the different part of electronic equipment 200.Usually in order to ensure receiving signal independently through the emission channel, the distance between two antennas is just enough greater than half of the wavelength that is used for emission.
In described execution mode, each receiving element 205 is connected in a plurality of tuner circuits 208, and wherein tuner circuit 208 is configured to be tuned to simultaneously same broadcast channel, for example is tuned to same carrier frequency.Each tuner circuit 208 outputs receive signal.Thereby signal processing unit 100 is analyzed based on blind channel estimation method and is received signal and estimate channel impulse response, come weighting or filtering signal and the reception signal of weighting or filtering superposeed to obtain to merge to receive signal according to results estimated, and this mergings reception signal can comprise than each independent signal more about the information of original transmitted signal.In addition, signal processing unit 100 can use the information that obtains from blind Channel Estimation that the preequalization that merges the reception signal is provided.Final signal processing unit 100 demodulation reception signal that merge or preequalization.
Therefore, the receiver of execution mode is constructed provides first to merge the reception signal, and just demodulation should merging reception signal heretofore.Though the signal processing unit of Fig. 1 when using different demodulation schemes to handle different emission standards for each RX path and first demodulator unit of a kind of situation need to(for) each emission standard, but for the receiver structure of present embodiment, only needs are just enough for a kind of single situation of the demodulator unit of each emission standard.
Signal processing unit 100 comprises estimator.Estimator uses the blind Channel Estimation algorithm to estimate channel impulse response and obtain estimated channel impulse response based on the reception signal for all samplings of each RX path
Figure BDA00002831158600061
Before the demodulation that receives signal, use blind Channel Estimation.
According to execution mode, calculate the impulse response of each estimation based on the sampled value of time domain situation of the reception signal of sampling and the cost function that in time domain, defines
Figure BDA00002831158600071
According to another execution mode, calculate the impulse response of each estimation based on the cost function that in frequency domain, defines
Figure BDA00002831158600072
Signal processing unit 100 also comprises the estimated impulse response that obtains based on by blind Channel Estimation
Figure BDA00002831158600073
Merge the merge cells that receives signal.According to execution mode, estimated impulse response Be used for configuration for the matched filter of each RX path, wherein each matched filter is complementary with the emission channel that is dispensed to corresponding RX path.The signal that merge cells may or may not come preequalization to merge based on the information that obtains by blind Channel Estimation.For example, merge cells for example can comprise by being combined the signal application equalization filter and comes the unit of the balanced distortion that is caused by the merging of for example MRC at least in part.It will represent the reception signal of the combination of the estimation of s emission signal s (t) or preequalization is forwarded to demodulator unit.Demodulator unit can comprise another equalizer unit that can utilize the information that comprises to eliminate the distortion of being introduced by emission channel and combiner unit in the transmitting of for example training symbol or signaling data.That is, the complete equilibrium of combined signal realizes based on the information that the demodulation from binding signal obtains.Signal processing unit 100 can export the signal of demodulation to control unit 290.
Control unit 290 can be controlled output equipment 294 and come the information of output encoder in the signal of demodulation.For example, input unit 294 can be the screen of the TV programme of code displaying in s emission signal s (t).According to another execution mode, the audio-frequency information of output unit 294 output encoders in s emission signal s (t).Electronic equipment 200 can also comprise the keyboard that for example is applied to output unit 294 or sensor array be used for allow the user to control the input unit 296 of electronic equipment 200.
Fig. 2 B relates to for for example DSL(Digital Subscriber Line of using single many outputs of input (SIMO) or multiple-input and multiple-output (MIMO) method) or the PLC(power line communication) the execution mode of electronic equipment 200 of wired communication system.Receiving element 205 can be to receive for example terminal of the connector block of, two or three live wire, the neutral line and/or ground wire of power line network.Tuner circuit 208 can be tuned to same carrier frequency and will receive signal r i(t) provide to signal processing unit 100.Signal processing unit 100 carries out for the blind Channel Estimation that obtains channel information.Signal processing unit 100 can be used diversity based on the result of blind Channel Estimation and merge to obtain to the "ball-park" estimate that transmits, possibility or may be not do not come the signal of signal, demodulation merging or preequalization that preequalization merges and export the signal of demodulation to control unit 290 based on the information that obtains by blind Channel Estimation.Control unit 290 can be handled signal and the interface unit 298 of demodulation can export the signal of processing.
Fig. 3 A shows the signal processing unit 100 in the acceptor device (for example television receiver) that is combined in electronic equipment 200.Acceptor device comprises receiving element 205 and tuning circuit 208.Signal processing unit 100 can comprise a plurality of A/D converters unit 110, and wherein each A/D converter unit 110 is with predetermined sample rate 1/T ACorresponding analog receiving signal r samples i(t).Reception signal r from sampling i(nT A) in, estimator 120 draws the reception signal r for each sampling i(nT A) the impulse response of estimation
Figure BDA00002831158600081
Merge cells 130 is based on the impulse response from estimating
Figure BDA00002831158600082
The merge coefficient that draws merges the reception signal r of sampling i(nT AThereby) or the signal that from this signal, draws obtain one and merge to receive signal, this reception signal is to the estimation via the s emission signal s (t) of a plurality of emission channels transmit.
Dissimilar DEMA, DEMB ... more than one demodulator unit 180 can receive signal y (nT by merging A) multiply each other reception signal y (nT synchronous and that demodulation is combined with the analytic signal with demodulator frequency A).More than one demodulator unit 180 can use the merging in time domain to receive signal y (nT A).According to execution mode, at least one demodulator unit 180 is used to merge and is received signal y (nT A) frequency domain representation.Converter unit 170 can be arranged on merge cells 130 and use in the signal path between the demodulator unit 180 of frequency domain representation then.Converter unit 170 can be combined and receive signal application DFT(discrete Fourier transform) obtain to merge the reception signal in the corresponding description of frequency domain.More than one demodulator unit 180 can be configured to the analog tv broadcast signal that different television broadcasting standards is followed in demodulation, and other demodulator unit 180 goes for demodulation digital TV broadcast signal, digital radio receiver broadcast singal or simulation broadcast receiver broadcast singal.According to execution mode, at least one demodulator unit 180 can comprise quadrature demodulator or OFDM(OFDM) demodulator.More than one demodulator unit 180 can also use the information that is coded in the reception signal to revise the demodulated received signal.Demodulator unit can comprise the bit-errors correction unit that uses bit-errors detection and correcting method to be corrected in the bit-errors in the numerical data stream.
About estimator 120, concept is to draw for the merge coefficient that receives signal ri (t) from the blind Channel Estimation for corresponding channel impulse response h i (t)
Figure BDA00002831158600091
Blind diversity combining method.Apparently, although the blind Channel Estimation algorithm comprises scalar fuzzy (scalar ambiguity) at least in their estimation, still can advantageously use but diversity merges: can illustrate as the inventor, it can be sane that diversity merges (even MRC) fuzzy with respect to the sort of scalar by the introducing of blind Channel Estimation algorithm.
Although the signal that merges is owing to union operation even more distortion, blind diversity merges still improves quality of signals, less deep fade for example takes place and/or improve SNR.It seems that on average the signal of merging comprises the information on more transmitting and should cause the better estimation to transmitting in subsequent step (for example using traditional equalization step of the training symbol that comprises in for example transmitting) usually about this extra information that transmits.
With channel impulse response determine to depend on very doughtily about to the understanding of the structure that transmits (for example, whether be ofdm signal etc. about transmitting, and/or about the training information in transmitting); And need extraction time usually, frequency and synchronous with reference to preceding clock; Or training symbol can be identified and the difference that is used for the conventional method of channel estimating, and the blind passage of Ti Chuing is passed merging herein neither needs the sampling clock that frequency need be before combining step yet synchronous.But blind diversity merges the cross-correlation statistics of utilizing between the reception signal and the situation of using the not demodulation that receives signal.Blind diversity merges can be based on the statistics cross-correlation of high-order.According to execution mode, blind diversity merges uses the second-order statistics cross-correlation.According to execution mode in addition, blind diversity merges the understanding of the type that does not rely on the required demodulation of corresponding type in order to the modulation that obtains to transmit and demodulated received signal.
Under the conventional method of considering the independent channel transfer function needed illustration to adopt for each RX path to separate to be in harmonious proportion the situation of synchronous demodulator unit, blind Channel Estimation received demodulator unit that signal only needs this part once for merging.Comprise in system under the situation of several demodulators of all being devoted to another communication system technology, communication standard or modulation technique, blind diversity merges and only allows respectively illustration for one of each communication system and communication standard independent demodulator.Therefore, at the MIMO(multiple-input and multiple-output) or the many outputs of the single input of SIMO() in the communication system, blind diversity merges and reduced the cost that is used for the classification receiver significantly.
Fig. 3 B shows according to the estimator 120 of the signal processor unit 100 of the execution mode of using blind Channel Estimation in time domain based on the cost function that defines of being combined with MRC and the details of merge cells 130.Estimator 120 receives the reception signal r of sampling i(nT A).According to execution mode, estimator 120 is used MCLMS(multichannel lowest mean square) method.
The MCLMS method depends on each observation to received signal that is not having under the situation of noise equation (4) to be supported:
（4）r i(t)*h j(t)=r j(t)*h i(t)
The deviation apart from this hypothesis that observes is considered to represent about in the error signal that receives the cross-correlation between signal i and the j.Reception signal r from all paired samplings i(nT A) definitions for error signals cost function.Cost function comprises the cross-correlation matrix that comprises about the information of the cross-correlation between all paired reception signals.Be used for estimating channel impulse response h i(nT A) alternative manner based on the value h of previous acquisition i((a) T A), the cross-correlation matrix of the error signal upgraded and the renewal value h that obtains to upgrade i((a) T A).According to another execution mode, MCN(multichannel newton) algorithm can be used for the convergence of accelerating algorithm.According to execution mode in addition, a plurality of different blind Channel Estimation algorithms of estimator 120 illustrations and can select signal sell select current blind Channel algorithm according to internal state or in response to first.Estimator 120 is continuously to control unit 132 output results estimated (for example, estimated channel impulse responses ).
Based on the impulse response of estimating
Figure BDA00002831158600102
With the Merge Scenarios of predefine or current selection, control unit 132 can continuous updating be arranged on the filter factor of the filter cell 134 in the signal path of reception signal of sampling.Control unit 132 can be programmable and can switch between MRC, EC and SC according to the second selection signal sel2 that is fit to or in response to the change of internal state.According to the execution mode that SC is provided, control unit 132 will be configured in estimative impulse response Be identified as least interference and receive filter cell 134 in the signal path of reception signal of signal and be configured to make least interference to receive signal to pass through, and other all filter cells 134 all are configured to stop other reception signal.
According to the execution mode of using MRC, control unit 132 draws the merge coefficient that filter cell 134 is configured to represent the matched filter that the emission channel with corresponding estimation mates respectively.Each filter cell 134 will receive signal and corresponding matched filter convolution of functions accordingly.
Thereby superpositing unit 136 produces the merging reception signal y (nT that represents the estimation that transmits with reception signal plus filtering or weighting or stack A).
Signal processing unit 130 can also comprise the signal z (nT that exports preequalization A) pre equalizer unit 138.Pre equalizer unit 138 can use the information that obtains from the blind Channel Estimation algorithm.According to execution mode, pre equalizer unit 138 for example comes the balanced distortion that is caused by MRC at least in part by being combined the signal application equalization filter.It should be noted that this is not fully balanced and partial-equilibrium just.
For example, merge the length that the reception signal can approximately have the twice of the longest channel impulse response.This will directly be increased in the needed exponent number of effective equalizer in the later demodulator stage.Protection can take place in ofdm system violates at interval.According to another execution mode, pre equalizer unit 138 is designed to alleviate the quick time-varying channel influence such as inter-carrier interference in ofdm demodulator afterwards.Before merging the reception signal, demodulation carries out preequalization.Can will merge receive the signal Fourier transform to the frequency domain before or after carry out preequalization.
Can see that blind diversity merging is independent of applied emission standard and can be applied to different emission systems and standard.Blind diversity merges single carrier and multi-carrier signal both is worked and do not needed to redesign existing demodulator.
According to Fig. 3 C, each filter cell 134 can comprise be used to providing and postponed T ACorresponding reception signal r doubly i(r, nT A) the delay cell 134a of delay situation.The reception signal r that configurable weighted units 134b is assigned to each delay situation and will be concerned about i(r, nT A) corresponding example and corresponding one the combination and coefficient c i(r, nT A) multiply each other.Thereby the output signal of weighted units 134b comes addition or stack to produce the signal y of filtering by using sum unit 134c i(r, nT A).
The signal processing unit 100 of above-mentioned execution mode and its each subelement can be implemented as hardware, software or their combination.For example, the subelement of some or all of signal processing unit 100 can be combined in for example IC(integrated circuit), the ASIC(application-specific integrated circuit (ASIC)) or the DSP(digital signal processor) encapsulation commonly used in.
Based on to the part understanding of channel transfer function and therefore need receive under the situation of the illustrative demodulator stage of signal for each before merge cells, the execution mode of explaining has realized that the blind diversity before demodulation merges in the diversity folding of prior art level.The merging of " blind " diversity has utilized enough advantageously uses the fact that diversity merges to the understanding of the cross-correlation of interchannel.This method can be applied to the communication system of wide scope.Can significantly reduce the cost for diversity receiver.
Fig. 4 relates to the method that operation can be included in the acceptor device in the electronic equipment.Estimator estimates to launch for each impulse response of channel from a plurality of reception signals
Figure BDA00002831158600121
The impulse response of each estimation wherein
Figure BDA00002831158600122
Draw from the blind Channel Estimation of utilizing the cross-correlation between a pair of reception signal (402).Each receives signal and is assigned to be used to another emission channel that transmits.Merge cells is based on the impulse response from estimating
Figure BDA00002831158600123
The merge coefficient that draws merge receive signal and consider to select or predefined diversity Merge Scenarios obtain to merge and receive signal, this mergings receives signal indication to by launching the estimation that transmits (404) of channels transmit.

Claims (26)

1. signal processing unit comprises:
Estimator (120), be configured to estimate to launch based on the blind Channel Estimation algorithm that utilizes the cross-correlation between the paired reception signal from a plurality of reception signals the channel impulse response of channel, wherein each reception signal is assigned to another in the described emission channel, and
Merge cells (130) obtains to merge the reception signal thereby be configured to merge described reception signal based on the merge coefficient that draws from estimated channel impulse response.
2. signal processing unit according to claim 1, wherein,
Described estimator (120) is configured to estimate one group of estimated coefficient based on the multichannel least mean square algorithm.
3. according to each the described signal processing unit in claim 1 or 2, wherein,
Described estimator (120) is configured to estimate described channel impulse response based on the iterative algorithm that minimizes cost function, wherein said cost function is based on the error signal from all paired reception signals, each error signal comes from the deviation between the convolution results of the impulse response of the described first emission channel of the convolution results of the impulse response of the second emission channel of the reception signal that receives by the first emission channel and estimation and the reception signal that receives by the described second emission channel and estimation, and the unit of the cross-correlation matrix that iterative algorithm uses comprises the mathematical expectation for the described cross-correlation of paired reception signal.
4. according to each the described signal processing unit in the claim 1 to 3, also comprise:
Filter cell (134), each filter cell (134) are configured in one the signal path in the described reception signal and the reception signal of output filtering; And
Control unit (132) is configured to draw merge coefficient from described estimated channel impulse response according to preselected diversity Merge Scenarios, and wherein said merge coefficient is used for control described filter cell (134).
5. signal processing unit according to claim 4, wherein,
Described control unit (132) is configured to use maximum ratio by the filter factor that is identified for matched filter from estimated channel impulse response and merges, and one estimated impulse response in each matched filter and the described emission channel is complementary.
6. according to each the described signal processing unit in claim 4 or 5, wherein,
Described control unit (132) is configured to by determining least interference reception signal from estimated channel impulse response and merging by coming application choice only to allow described least interference receive signal by the described filter cell of control (134).
7. according to each the described signal processing unit in the claim 4 to 6, also comprise:
Superpositing unit (136), the reception signal of the institute's filtering that is configured to superpose obtains described merging and receives signal.
8. according to the described signal processing unit of aforesaid arbitrary claim, also comprise:
Pre equalizer unit (138) is configured to use the filter factor that draws from the information by described estimator (120) output to come partly balanced described merging reception signal.
9. according to the described signal processing unit of aforesaid arbitrary claim, also comprise:
Converter unit (170) is configured to the derivative of described merging reception signal or described merging reception signal is converted in the frequency domain, thereby obtains the frequency representation that described merging receives the derivative of signal or described merging reception signal.
10. according to each the described signal processing unit in the claim 1 to 9, also comprise:
Demodulator unit (180) is configured to derivative or corresponding frequency representation that the described merging of demodulation receives signal or described merging reception signal.
11. signal processing unit according to claim 10 also comprises:
Balanced unit is configured to come balanced described merging fully to receive derivative or the corresponding frequency representation of signal or described merging reception signal based on the information that obtains by the demodulation of being undertaken by described demodulator unit (180).
12. each the described signal processing unit according in the claim 1 to 10 also comprises:
A plurality of demodulator unit (180), each demodulator unit (180) is configured to derivative or the corresponding frequency representation that the described merging of demodulation receives signal or described merging reception signal, and described demodulator unit (180) is applicable to different launch scenarios and/or emission standard.
13. according to the described signal processing unit of aforesaid arbitrary claim, wherein,
Described estimator (120) is configured to estimate described channel impulse response in described transmitting under the condition of not using about the information of the training symbol that comprises.
14. according to the described signal processing unit of aforesaid arbitrary claim, wherein,
Described reception signal does not comprise the training symbol for channel estimating.
15. according to the described signal processing unit of aforesaid arbitrary claim, wherein,
Described estimator (120) is configured to estimate described channel impulse response exclusively based on the situation of the not demodulation of described reception signal and/or the predefine information that is not included in the described reception signal.
16. according to the described signal processing unit of aforesaid arbitrary claim, wherein,
Described estimator (120) is configured to estimate described channel impulse response under the condition of the type of the type of not knowing to obtain the described applied modulation that transmits and the needed demodulation of the described reception signal of demodulation.
17. one kind comprises the integrated circuit according to the described signal processing unit of aforesaid arbitrary claim.
18. an electronic equipment comprises:
According to each the described signal processing unit in the claim 1 to 16; And
A plurality of tuner circuits (208), each tuner circuit (208) are configured to be tuned to the carrier frequency that transmits and output analog receiving signal, and wherein each analog receiving signal is assigned in the described emission channel one.
19. a method of operating acceptor device, described method comprises:
Use estimation unit (120) to estimate to launch the channel impulse response of channel based on the blind Channel Estimation algorithm that utilizes the cross-correlation between the paired reception signal from a plurality of reception signals, wherein each reception signal is assigned to another in the described emission channel, and
Use merge cells (130) thus merging described reception signal based on the merge coefficient that draws from estimated channel impulse response obtains to merge and receives signal.
20. method according to claim 19 wherein, estimates that described channel impulse response comprises:
Application makes the iterative algorithm of cost function minimum, wherein said cost function is based on the total error signal of considering all fractional error signals between paired reception signal, the various piece error signal comes from the convolution results of the reception signal that receives by the first emission channel and the impulse response of the second emission channel of estimation and deviation between the convolution results of impulse response of channel is launched in the reception signal that receives by the described second emission channel and described first of estimation, and the unit of the cross-correlation matrix of described iterative algorithm use comprises for the mathematical expectation of the cross-correlation of paired reception signal and the generation of the described iterative algorithm estimation for described channel impulse response.
21. each the described method according in the claim 19 to 20 also comprises:
Use converter unit (170) thus described merging is received derivative that signal or described merging receive signal to be converted into and to obtain described merging in the frequency domain and receive the frequency representation that signal or described merging receive the derivative of signal.
22. each the described method according in the claim 19 to 21 also comprises:
Use demodulator unit (180) to come the described merging of demodulation to receive derivative or the corresponding frequency representation of signal or described merging reception signal.
23. according to each the described method in the claim 19 to 22, wherein,
Estimate one group of coefficient of estimating and do not use the training symbol that comprises about in described transmitting.
24. according to each the described method in the claim 19 to 23, wherein,
Described reception signal does not comprise the training symbol for channel estimating.
25. according to each the described method in the claim 19 to 24, wherein,
Estimate described one group of coefficient of estimating exclusively based on described reception signal and predefine information.
26. a signal processing unit comprises:
Estimator means is used for estimating to launch the channel impulse response of channel from a plurality of reception signals based on the blind Channel Estimation algorithm that utilizes the cross-correlation between the paired reception signal, and wherein each receives signal and is assigned in the emission channel another, and
Merge device, obtain to merge the reception signal thereby be used for merging described reception signal based on the merge coefficient that draws from estimated channel impulse response, the input of described merging device is electrically connected to the output of described estimator means.
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