CN104869082A  Information processing method and electronic device  Google Patents
Information processing method and electronic device Download PDFInfo
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 CN104869082A CN104869082A CN201410060967.9A CN201410060967A CN104869082A CN 104869082 A CN104869082 A CN 104869082A CN 201410060967 A CN201410060967 A CN 201410060967A CN 104869082 A CN104869082 A CN 104869082A
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Abstract
Description
Technical field
The application relates to wireless communication technology field, particularly a kind of information processing method and electronic equipment.
Background technology
In a wireless communication system, the signal that transmitter sends to receiver is in the process of transmission, send signal owing to being subject to the impact of reflex and refraction effect, the signal that can produce the different path of multiple process arrives receiver, receiver, by carrying out vector superposed to the signal from multiple different path received, obtains Received signal strength.Just because of this Multipath Transmission characteristic of signal in transmitting procedure, make the level of Received signal strength there will be fluctuation, namely occur multipath fading phenomenon.Popular, the signal that transmitter sends, after traffic channel, can add interference and noise signal, or occur distortion phenomenon, cause receiver cannot go out real Received signal strength according to the signal receiving that is disturbed received.
Because channel disturbance affects the correctness of receiver demodulated received signal, therefore, when Signal transmissions, channel estimating is carried out to communication channel, describe out the impact of channel on input signal as far as possible exactly and be very important.
But present inventor is in the process realizing invention technical scheme in the embodiment of the present application, find that abovementioned technology at least exists following technical problem:
In the prior art, for some channel models such as GSM, CDMA, all set corresponding channel estimation method, but for utilizing the communication channel of carrying out Signal transmissions as other procotols such as IEEE802.11ad there is no corresponding channel estimation methods.That is, there is receiver cannot carry out correct demodulation technical problem to the signal of the communication channel from IEEE802.11ad consensus standard received in prior art.
Summary of the invention
The embodiment of the present application is by providing a kind of method and electronic equipment of information processing, the technical problem of correct demodulation cannot be carried out to the signal of the communication channel from IEEE802.11ad consensus standard received in order to solve the receiver existed in prior art, give a kind of communications channel estimation method, make receiver when receiving the signal based on the such as traffic channel of other procotol such as IEEE802.11ad, the transmission characteristic of this channel can be estimated according to the method, and according to the signal that the correctly demodulation of this characteristic of channel receives.
On the one hand, the embodiment of the present application provides a kind of method of information processing, and be applied in the receiver in a communication system, described method comprises:
When determining the first targeting sequencing and second targeting sequencing of the physical layer frame in the first communication standard, containing first by the communication channel receiving package of described communication system and transmitting and the first Received signal strength of noise signal;
Described first Received signal strength and described first targeting sequencing are carried out slip relevant, obtain the first correlated series, and it is relevant that described first Received signal strength and described second targeting sequencing are carried out slip, obtains the second correlated series;
Based on described first correlated series and described second correlated series, obtain the channel time domain response sequence of described communication channel;
Selected part sequence from described channel time domain response sequence, obtains channel frequency response sequence according to described partial sequence, and carries out the first demodulation based on the first Received signal strength described in described channel frequency response sequence pair, obtain the first restituted signal.
Optionally, described that described first Received signal strength and described first targeting sequencing are carried out slip is relevant, obtain the first correlated series, and it is relevant that described first Received signal strength and described second targeting sequencing are carried out slip, obtains the second correlated series, specifically comprise:
Frame format standard based on described physical layer frame carries out frame synchronization to described first Received signal strength, to determine the first estimated sequence for channel estimating from described first Received signal strength;
Described first estimated sequence and described first targeting sequencing are carried out slip relevant, obtain described first correlated series, and it is relevant that described first estimated sequence and described second targeting sequencing are carried out slip, obtains described second correlated series.
Optionally, described based on described first correlated series and described second correlated series, obtain the channel time domain response sequence of described communication channel, specifically comprise:
Based on described first correlated series and described second correlated series, determine the transmission means of described communication channel based on described first communication standard signal transmission;
Based on described transmission means, described first correlated series and described second correlated series, obtain the described channel time domain response sequence of described communication channel.
Optionally, described based on described first correlated series and described second correlated series, determine the transmission means of described communication channel based on described first communication standard signal transmission, specifically comprise:
Obtain the mould of the second sequential value in the mould of the First ray value in described first correlated series and described second correlated series;
Judge the mould of described First ray value square whether to be greater than the mould of described second sequential value square, obtain the first judged result;
When described first judged result is for being, determine that described transmission means is the first transmission means.
Optionally, described based on described transmission means, described first correlated series and described second correlated series, obtain the described channel time domain response sequence of described communication channel, be specially:
Based on the rear N number of value in the top n value in described first correlated series and described second correlated series, obtain the first time domain impulse response sequence of described communication channel, wherein, M value is comprised in described first correlated series, M value is comprised in described second correlated series, M is positive integer, and N is the positive integer being less than or equal to M.
Optionally, described from described channel time domain response sequence selected part sequence, obtain channel frequency response sequence according to described partial sequence, and carry out the first demodulation based on the first Received signal strength described in described channel frequency response sequence pair, obtain the first restituted signal, specifically comprise:
Described partial sequence is chosen from described first time domain impulse response sequence, and obtain described channel frequency response sequence according to described partial sequence, wherein, in described first time domain impulse response sequence, comprise N number of value, comprise P value in described partial sequence, P is the positive integer being less than or equal to N;
Based on described channel frequency response, described first demodulation is carried out to described first Received signal strength, obtain described first restituted signal.
Optionally, described judge the mould of described First ray value square whether to be greater than the mould of described second sequential value square, after obtaining the first judged result, described method also comprises:
When described first judged result is no, determine that described transmission means is second transmission means different from described first transmission means.
Optionally, described based on described transmission means, described first correlated series and described second correlated series, obtain the described channel time domain response sequence of described communication channel, be specially:
Based on the top n value in the rear N number of value in described first correlated series and described second correlated series, obtain the second time domain impulse response sequence of described communication channel, wherein, M value is comprised in described first correlated series, M value is comprised in described second correlated series, M is positive integer, and N is the positive integer being less than or equal to M.
Optionally, described from described channel time domain response sequence selected part sequence, obtain channel frequency response sequence according to described partial sequence, and carry out the first demodulation based on the first Received signal strength described in described channel frequency response sequence pair, obtain the first restituted signal, specifically comprise:
Described partial sequence is chosen from described second time domain impulse response sequence, and obtain described channel frequency response sequence according to described partial sequence, wherein, in described second time domain impulse response sequence, comprise N number of value, comprise P value in described partial sequence, P is the positive integer being less than or equal to N;
Carry out described first demodulation based on the first Received signal strength described in described channel frequency response sequence pair, obtain described first restituted signal.
Optionally, described based on described first correlated series and described second correlated series, after obtaining the channel time domain response sequence of described communication channel, described method also comprises:
Based on described channel time domain response sequence, the second demodulation is carried out to described first Received signal strength, obtain the second restituted signal.
On the other hand, the embodiment of the present application additionally provides a kind of electronic equipment, and be applied in a communication system, described electronic equipment comprises:
First receiving element, for when determining the first targeting sequencing and second targeting sequencing of the physical layer frame in the first communication standard, containing first by the communication channel receiving package of described communication system and transmitting and the first Received signal strength of noise signal;
First acquiring unit, relevant for described first Received signal strength and described first targeting sequencing are carried out slip, obtain the first correlated series, and it is relevant that described first Received signal strength and described second targeting sequencing are carried out slip, obtains the second correlated series;
Second acquisition unit, for based on described first correlated series and described second correlated series, obtains the channel time domain response sequence of described communication channel;
3rd acquiring unit, for selected part sequence from described channel time domain response sequence, obtain channel frequency response sequence according to described partial sequence, and carry out the first demodulation based on the first Received signal strength described in described channel frequency response sequence pair, obtain the first restituted signal.
Optionally, described first acquiring unit, specifically comprises:
First synchronous subelement, carries out frame synchronization for the frame format standard based on described physical layer frame to described first Received signal strength, to determine the first estimated sequence for channel estimating from described first Received signal strength;
First obtains subelement, it is relevant for described first estimated sequence and described first targeting sequencing are carried out slip, obtain described first correlated series, and it is relevant that described first estimated sequence and described second targeting sequencing are carried out slip, obtains described second correlated series.
Optionally, described second acquisition unit, specifically comprises:
First determines subelement, for based on described first correlated series and described second correlated series, determines the transmission means of described communication channel based on described first communication standard signal transmission;
Second obtains subelement, for based on described transmission means, described first correlated series and described second correlated series, obtains the described channel time domain response sequence of described communication channel.
Optionally, described first determines subelement, specifically comprises:
First acquisition module, for obtaining the mould of the second sequential value in the mould of the First ray value in described first correlated series and described second correlated series;
First judge module, for judge the mould of described First ray value square whether to be greater than the mould of described second sequential value square, obtain the first judged result;
First determination module, for when described first judged result is for being, determines that described transmission means is the first transmission means.
Optionally, described second obtains subelement, is specially:
Based on the rear N number of value in the top n value in described first correlated series and described second correlated series, obtain the first time domain impulse response sequence of described communication channel, wherein, M value is comprised in described first correlated series, M value is comprised in described second correlated series, M is positive integer, and N is the positive integer being less than or equal to M.
Optionally, described 3rd acquiring unit, specifically comprises:
3rd obtains subelement, for choosing described partial sequence from described first time domain impulse response sequence, and obtain described channel frequency response sequence according to described partial sequence, wherein, N number of value is comprised in described first time domain impulse response sequence, comprise P value in described partial sequence, P is the positive integer being less than or equal to N;
4th obtains subelement, for carrying out described first demodulation based on described channel frequency response to described first Received signal strength, obtains described first restituted signal.
Optionally, described first determines that subelement also comprises:
Second determination module, for judge at described first judge module the mould of described First ray value square whether to be greater than the mould of described second sequential value square, after obtaining the first judged result, when described first judged result is no, determine that described transmission means is second transmission means different from described first transmission means.
Optionally, described second obtains subelement, is specially:
Based on the top n value in the rear N number of value in described first correlated series and described second correlated series, obtain the second time domain impulse response sequence of described communication channel, wherein, M value is comprised in described first correlated series, M value is comprised in described second correlated series, M is positive integer, and N is the positive integer being less than or equal to M.
Optionally, described 3rd acquiring unit, specifically comprises:
5th obtains subelement, for choosing described partial sequence from described second time domain impulse response sequence, and obtain described channel frequency response sequence according to described partial sequence, wherein, N number of value is comprised in described second time domain impulse response sequence, comprise P value in described partial sequence, P is the positive integer being less than or equal to N;
6th obtains subelement, for carrying out described first demodulation based on the first Received signal strength described in described channel frequency response sequence pair, obtains described first restituted signal.
Optionally, described electronic equipment also comprises:
4th acquiring unit, for at described second acquisition unit based on described first correlated series and described second correlated series, after obtaining the channel time domain response sequence of described communication channel, based on described channel time domain response sequence, the second demodulation is carried out to described first Received signal strength, obtain the second restituted signal.
The one or more technical schemes provided in the embodiment of the present application, at least have following technique effect or advantage:
(1) due in the embodiment of the present application, when determining the first targeting sequencing and second targeting sequencing of the physical layer frame in the first communication standard, containing first by the communication channel receiving package of described communication system and transmitting and the first Received signal strength of noise signal; Described first Received signal strength and described first targeting sequencing are carried out slip relevant, obtain the first correlated series, and it is relevant that described first Received signal strength and described second targeting sequencing are carried out slip, obtains the second correlated series; Based on described first correlated series and described second correlated series, obtain the channel time domain response sequence of described communication channel; Selected part sequence from described channel time domain response sequence, obtains channel frequency response sequence according to described partial sequence, and carries out the first demodulation based on the first Received signal strength described in described channel frequency response sequence pair, obtain the first restituted signal.Visible, communication channel in communication system is when carrying out Signal transmissions according to the first communication standard, receiver is after receiving the first Received signal strength, by the first Received signal strength respectively to the physical layer frame in described first communication standard leading in the first targeting sequencing and the second targeting sequencing to carry out slip relevant, obtain the first correlated series and the second correlated series, and the channel time domain response sequence of described communication channel is tried to achieve based on two correlated serieses, the channel frequency response sequence that can reflect the characteristic of channel is determined again based on described channel time domain response sequence, and the first demodulation is carried out to the first Received signal strength, obtain the first restituted signal, solve the receiver existed in prior art cannot carry out correct demodulation technical problem to the signal of the communication channel from IEEE802.11ad consensus standard received, achieve by providing a kind of communications channel estimation method, make receiver when receiving the signal based on the such as traffic channel of other procotol such as IEEE802.11ad, the transmission characteristic of this channel can be estimated according to the method, and the technique effect of the signal received according to the correctly demodulation of this characteristic of channel.
(2) due in the embodiment of the present application, when acquisition first correlated series and the second correlated series, first the frame format standard based on described physical layer frame carries out frame synchronization to described first Received signal strength, to determine the first estimated sequence for channel estimating from described first Received signal strength; Described first estimated sequence and described first targeting sequencing are carried out slip relevant, obtain described first correlated series, and it is relevant that described first estimated sequence and described second targeting sequencing are carried out slip, obtain described second correlated series, the frame format standard achieving physically based deformation layer frame determines the first estimated sequence (i.e. partial sequence in the preamble sequence of the first Received signal strength) from the first Received signal strength, thus can to make full use of in the first communication protocol standard physical layer frame form to carry out the technique effect of channel estimating.
(3) due in the embodiment of the present application, based on described first correlated series and described second correlated series, obtain in the process of channel time domain response sequence of described communication channel, first based on described first correlated series and described second correlated series, the transmission means of described communication channel based on described first communication standard signal transmission is determined; Then, based on described transmission means, described first correlated series and described second correlated series, obtain the described channel time domain response sequence of described communication channel, achieve based on the first correlated series and the second relevant retrieval communication channel signal transmission means, and carry out the technique effect of communications channel estimation in conjunction with transmission means.
(4) due in the embodiment of the present application, when obtaining the channel time domain response sequence of communication channel based on traffic channel mode, the first correlated series and the second correlated series, the time domain impulse response sequence of communication channel can be obtained based on the first correlated series and the second correlated series, that is, when estimating channel time domain response, the communication characteristic in each footpath near the front and back having estimated the footpath at synchronous place in communication channel, makes channel equalization comparatively accurate.
(5) due in the embodiment of the present application, in selected part sequence from described channel time domain response sequence, channel frequency response sequence is obtained according to described partial sequence, and carry out the first demodulation based on the first Received signal strength described in described channel frequency response sequence pair, obtain in the process of the first restituted signal, can from described channel time domain response sequence selected part sequence as main reference sequences, thus acquisition channel frequency response sequence (when transmission means is the first transmission means, obtains from the first time domain impulse response sequence; When transmission means is the second transmission means, obtain from the second time domain impulse response sequence), the characteristic of channel that receiver can be reflected according to channel frequency response sequence correctly carries out the first demodulation to received signal, that is, when calculating channel frequency response, according to the characteristic of channel, remove and be disturbed larger channel time domain response, and selected part is interferencefree or be disturbed less channel time domain response transform to frequency domain, thus reduce the impact of Noise and Interference on channel frequency response, make channel frequency response more accurate.
(6) due in the embodiment of the present application, after the channel time domain response sequence of acquisition of communication channels, receiver can carry out the second demodulation based on described channel time domain response sequence to described first Received signal strength, obtain the second restituted signal, that is, receiver both carried out signal receiving by the timedomain response sequence of channel, and the frequency response sequence also by channel carries out demodulation, achieves the variation of demodulation mode.
Accompanying drawing explanation
The method flow diagram of a kind of information processing that Fig. 1 provides for the embodiment of the present application;
The structural representation of the frame preamble sequence of two kinds of frame transmission meanss that Fig. 2 AFig. 2 B provides for the embodiment of the present application;
The structured flowchart of a kind of electronic equipment that Fig. 3 provides for the embodiment of the present application.
Embodiment
The embodiment of the present application is by providing a kind of method and electronic equipment of information processing, solve the receiver existed in prior art cannot carry out correct demodulation technical problem to the signal of the communication channel from IEEE802.11ad consensus standard received, give a kind of communications channel estimation method, make receiver when receiving the signal based on the such as traffic channel of other procotol such as IEEE802.11ad, the transmission characteristic of this channel can be estimated according to the method, and according to the signal that the correctly demodulation of this characteristic of channel receives.
Technical scheme in the embodiment of the present application is for solving the problem, and general thought is as follows:
The embodiment of the present application provides a kind of method of information processing, be applied in the receiver in a communication system, described method comprises: when determining the first leading targeting sequencing and second targeting sequencing of the physical layer frame in the first communication standard, contains first transmit and the first Received signal strength of noise signal by the communication channel receiving package of described communication system; Described first Received signal strength and described first targeting sequencing are carried out slip relevant, obtain the first correlated series, and it is relevant that described first Received signal strength and described second targeting sequencing are carried out slip, obtains the second correlated series; Based on described first correlated series and described second correlated series, obtain the impulse response sequence of described communication channel; Selected part sequence from described impulse response sequence, obtains channel frequency response sequence according to described partial sequence, and carries out the first demodulation based on the first Received signal strength described in described channel frequency response sequence pair, obtain the first restituted signal.
Visible, in the embodiment of the present application, when determining the first leading targeting sequencing and second targeting sequencing of the physical layer frame in the first communication standard, containing first by the communication channel receiving package of described communication system and transmitting and the first Received signal strength of noise signal; Described first Received signal strength and described first targeting sequencing are carried out slip relevant, obtain the first correlated series, and it is relevant that described first Received signal strength and described second targeting sequencing are carried out slip, obtains the second correlated series; Based on described first correlated series and described second correlated series, obtain the impulse response sequence of described communication channel; Selected part sequence from described impulse response sequence, obtains channel frequency response sequence according to described partial sequence, and carries out the first demodulation based on the first Received signal strength described in described channel frequency response sequence pair, obtain the first restituted signal.Visible, communication channel in communication system is when carrying out Signal transmissions according to the first communication standard, receiver is after receiving the first Received signal strength, by the first Received signal strength respectively to the physical layer frame in described first communication standard leading in the first targeting sequencing and the second targeting sequencing to carry out slip relevant, obtain the first correlated series and the second correlated series, and the impulse response sequence of described communication channel is tried to achieve based on two correlated serieses, the channel frequency response sequence that can reflect the characteristic of channel is determined again based on described impulse response sequence, and the first demodulation is carried out to the first Received signal strength, obtain the first restituted signal, solve the receiver existed in prior art cannot carry out correct demodulation technical problem to the signal of the communication channel from IEEE802.11ad consensus standard received, achieve by providing a kind of communications channel estimation method, make receiver when receiving the signal based on the such as traffic channel of other procotol such as IEEE802.11ad, the transmission characteristic of this channel can be estimated according to the method, and the technique effect of the signal received according to the correctly demodulation of this characteristic of channel.
In order to better understand technique scheme, below in conjunction with Figure of description and concrete execution mode, technique scheme is described in detail, the specific features being to be understood that in the embodiment of the present application and embodiment is the detailed description to technical scheme, instead of the restriction to technical scheme, when not conflicting, the technical characteristic in the embodiment of the present application and embodiment can combine mutually.
Embodiment one
Please refer to Fig. 1, the embodiment of the present application provides a kind of method of information processing, and be mainly used in the receiver in a wireless communication system, described method comprises the steps:
S101: when determining the first targeting sequencing and second targeting sequencing of the physical layer frame in the first communication standard, contains first by the communication channel receiving package of described communication system and transmits and the first Received signal strength of noise signal;
S102: described first Received signal strength and described first targeting sequencing are carried out slip relevant, obtain the first correlated series, and it is relevant that described first Received signal strength and described second targeting sequencing are carried out slip, obtains the second correlated series;
S103: based on described first correlated series and described second correlated series, obtain the channel time domain response sequence of described communication channel;
S104: selected part sequence from described channel time domain response sequence, obtains channel frequency response sequence according to described partial sequence, and carries out the first demodulation based on the first Received signal strength described in described channel frequency response sequence pair, obtain the first restituted signal.
Concrete, for the first communication standard for IEEE802.11ad consensus standard, the leading of IEEE802.11ad physical layer frame comprises STF(Short Training Field) and CEF(Channel EstimationField), STF and CEF is by Ga _{128},Ga _{128}, Gb _{128},Gb _{128}sequence composition.Wherein, Ga _{128}and Gb _{128}it is the Golay sequence of a pair complementation.
IEEE802.11ad consensus standard supports different physical layer type for different application scenarioss, it supports multiple physical layers type, comprises and controls physical layer (Control PHY), single carrier physical layer (SCPHY), lowpower consumption single carrier physical layer (Low Power SC PHY) and OFDM physical layer (OFDM PHY).Control PHY designs for low signaltonoise ratio operation, and force to adopt single carrier model, data rate is 27.5Mbit/s to the maximum.SC PHY allows the transceiver of lowpower consumption, low complex degree, and the maximum data rate of support can reach 4.6Gbit/s.Low Power SC PHY reduces the processing power of transceiver by coded system and the shorter symbolic construction simplified, and the maximum data rate of support is 2.6Gbit/s.OFDM PHY can realize better performance in frequencyselective channel.SC PHY has the different scopes of application from OFDM PHY: OFDM PHY is suitable in long propagation distance, greatly expands transmission under case propagation delays, can process multipathpropagated signal; SC PHY generally obtains lower power consumption, is suitable for smallsized, lowpower handheld device uses.
Wherein, as shown in Figure 2 A, the leading structure of OFDM PHY as shown in Figure 2 B for the leading structure of Control PHY, SC PHY and Low Power SC PHY.From Fig. 2 A, Fig. 2 B, Gu _{512}sequence is by Golay the sequence (Gb of 4 128 length _{128},Ga _{128}, Gb _{128},Ga _{128}) composition, Gv _{512}sequence is by Golay the sequence (Gb of 4 128 length _{128}, Ga _{128},Gb _{128},Ga _{128}) composition.In the embodiment of the present application, when the first communication standard is IEEE802.11ad, leading first of its physical layer frame is leadingly specifically as follows Gu _{512}sequence, second is leadingly specifically as follows Gv _{512}sequence.
In specific implementation process, due in a wireless communication system, what transmitter was launched first transmits after traffic channel, can add noise signal, and the signal that receiver is obtained is include first to transmit and the first Received signal strength of noise signal.In the embodiment of the present application, when carrying out channel estimating, receiver is first by the first Received signal strength and Gu _{512}sequence is carried out slip and is correlated with, and obtains the first correlated series, and by the first Received signal strength and Gv _{512}sequence is carried out slip and is correlated with, and obtains the second correlated series.
Concrete, in the process of acquisition first correlated series and the second correlated series, in order to the frame format standard of physically based deformation layer frame the first estimated sequence (i.e. partial sequence in the preamble sequence of the first Received signal strength) can be determined from the first Received signal strength, thus physical layer frame form can be made full use of in the first communication protocol standard to carry out channel estimating, step S102: described first Received signal strength and described first targeting sequencing are carried out slip relevant, obtain the first correlated series, and it is relevant that described first Received signal strength and described second targeting sequencing are carried out slip, obtain the second correlated series, specifically comprise:
Frame format standard based on described physical layer frame carries out frame synchronization to described first Received signal strength, to determine the first estimated sequence for channel estimating from described first Received signal strength;
Described first estimated sequence and described first targeting sequencing are carried out slip relevant, obtain described first correlated series, and it is relevant that described first estimated sequence and described second targeting sequencing are carried out slip, obtains described second correlated series.
That is, the receiving terminal of communication system is after getting the first Received signal strength, first physically based deformation layer frame format standard can carry out frame synchronization to received signal, obtain the first estimated sequence for channel estimating, define the first estimated sequence here and comprise the lastGa of STF _{128}sequence and whole CEF sequence.Composition graphs 2A and Fig. 2 B is known, and the first estimated sequence length is 1280, namely comprises 1280 numbers, if note the first estimated sequence is r(n), so wherein n value is the integer (comprising 0 and 1279) between 0 ~ 1279.
Further, if the first correlated series is Cu (k), so can obtain the first correlated series through but not limited to formula (a), formula (a) is expressed as follows:
Wherein, 0≤n=i+k≤1279,0≤i≤511, known, k=0,1 ..., 768
If the second correlated series is Cv (k), so can obtain the second correlated series through but not limited to formula (b), formula (b) is expressed as follows:
Wherein, 0≤n=i+k≤1279,0≤i≤511, known, k=0,1 ..., 768
Further, in order to can based on the first correlated series and the second relevant retrieval communication channel signal transmission means, and carry out communications channel estimation in conjunction with transmission means, step S103: based on described first correlated series and described second correlated series, obtain the channel time domain response sequence of described communication channel, specifically comprise step:
Based on described first correlated series and described second correlated series, determine the transmission means of described communication channel based on described first communication standard signal transmission;
Based on described transmission means, described first correlated series and described second correlated series, obtain the described channel time domain response sequence of described communication channel.
In specific implementation process, in order to when the first communication standard has multiple frame transmission means, determine the first transmission means, described based on described first correlated series and described second correlated series, determine the transmission means of described communication channel based on described first communication standard signal transmission, specifically comprise:
Obtain the First ray value in described first correlated series and the second sequential value in described second correlated series; Wherein, First ray value and the second sequential value are the value of k when getting 128, and the first correlated series is Cu (k), and First ray value is Cu (128), and the second correlated series is Cv (k), and First ray value is Cv (128);
Judge the mould of described First ray value square whether to be greater than the mould of described second sequential value square, obtain the first judged result;
When described first judged result is for being, determine that described transmission means is the first transmission means;
When described first judged result is no, determine that described transmission means is second transmission means different from described first transmission means.
Concrete, obtain transmission means under IEEE802.11ad consensus standard and comprise: Control PHY transmission means, SC PHY transmission means, Low Power SC PHY transmission means and OFDM PHY transmission means.First, by compare the mould of the Cu (128) in the first relevant sequence C u (k) square  Cu (128)  ^{2}with the mould of the Cv (128) in the second relevant sequence C v (k) square  Cv (128)  ^{2}.When  Cu (128)  ^{2}be greater than  Cv (128)  ^{2}time, then judge that the transmission means of this frame is Control PHY transmission means or SC PHY transmission means or LowPower SC PHY transmission means; Otherwise, judge that the transmission means of this frame is OFDM PHY transmission means.
Further, when judging to learn that the transmission means of this frame is the first transmission means (Control PHY transmission means or SC PHY transmission means or Low Power SC PHY transmission means), in order to when estimating channel time domain response, the communication characteristic in each footpath near the front and back having estimated the footpath at synchronous place in communication channel, make channel equalization comparatively accurate, described based on described transmission means, described first correlated series and described second correlated series, obtain the described channel time domain response sequence of described communication channel, be specially:
Based on the rear N number of value in the top n value in described first correlated series and described second correlated series, obtain the first time domain impulse response sequence of described communication channel, wherein, M value is comprised in described first correlated series, M value is comprised in described second correlated series, M is positive integer, and N is the positive integer being less than or equal to M.Specifically, the relevant sequence C v (k) of first relevant sequence C u (k) and second comprises 769 numerical value (i.e. M=769) respectively, front 257(and N=257 by the first relevant sequence C u (k)) individual value (Cu (k), k=0,1,256) latter 257 of sequence C v (k) relevant to second are worth (Cv (512+k), k=0,1 ..., 256) corresponding to be added again divided by 512, be averaged again afterwards (namely divided by 2), obtain the first time domain impulse response sequences h of communication channel _{1}(k), computing formula is such as formula shown in (c):
Wherein, k=0,1 ..., 256.
Further, in order to when calculating channel frequency response, according to the characteristic of channel, remove and be disturbed larger channel time domain response, and selected part is interferencefree or be disturbed less channel time domain response transform to frequency domain, thus reduce the impact of Noise and Interference on channel frequency response, make channel frequency response more accurate, step S104: selected part sequence from described channel time domain response sequence, channel frequency response sequence is obtained according to described partial sequence, and carry out the first demodulation based on the first Received signal strength described in described channel frequency response sequence pair, obtain the first restituted signal, specifically comprise:
Described partial sequence is chosen from described first time domain impulse response sequence, and obtain described channel frequency response sequence according to described partial sequence, wherein, in described first time domain impulse response sequence, comprise N number of value, comprise P value in described partial sequence, P is the positive integer being less than or equal to N;
Based on described channel frequency response, the first demodulation is carried out to described first Received signal strength, obtain described first restituted signal.
Specifically, the first time domain impulse response sequences h is chosen _{1}a part of sequence { h of (k) _{1}(128L _{2}) ..., h _{1}(127), h _{1}(128), h _{1}(129) ..., h _{1}(128+L _{1}), transform to frequency domain, obtain the frequency response of communication channel, wherein, L _{1}and L _{2}be be greater than 0 and be less than or equal to 128 integer.Obviously, the first time domain impulse response sequences h _{1}257 numbers are comprised, described partial sequence { h in (k) _{1}(128L _{2}) ..., h _{1}(127), h _{1}(128), h _{1}(129) ..., h _{1}(128+L _{1}) in number number be less than or equal to 257.
Due to h _{1}and h (0) _{1}(256) impact that the channel time domain response near is subject to multipath jamming is larger and inaccurate, when calculating channel frequency response by h _{1}and h (0) _{1}(256) harmful effect that can reduce multipath jamming and bring transmission is given up in the channel time domain response near.Meanwhile, away from h _{1}(128) real channel time domain response amplitude can be very little, then the channel time domain response estimated contains larger noise relatively, therefore, when calculating channel frequency response, by h _{1}and h (0) _{1}(256) interference that can reduce noise and bring is given up in the channel time domain response near.On the other hand, if L _{1}and L _{2}value excessive, then the channel time domain response of losing can too much, and channel frequency response can become inaccurate.Therefore, L _{1}and L _{2}value should determine according to the characteristic of channel, guarantee first time domain impulse response sequences h _{1}k the described partial sequence in () comprises enough channel time domain responses.
Calculate channel frequency response need the demand according to frequency equalizing algorithm and determine, a kind of typical method is:
First, to described partial sequence { h _{1}(128L _{2}) ..., h _{1}(127), h _{1}(128), h _{1}(129) ..., h _{1}(128+L _{1}) carry out zero padding, thus the partial sequence after the length adjustment obtained , the principle of zero padding is for making length meet channel frequency response length needed for channel frequency equilibrium. expression such as formula shown in (d):
Wherein, l=0,1 ..., the length of X1, the X channel frequency response needed for frequency domain equalization, for IEEE802.11ad consensus standard, X should be decided to be 512.According to calculate channel frequency response signal H _{1}m the method for () can adopt but be not limited to the discrete fourier transform algorithm DFT that following formula (e) states:
Wherein, 0≤m≤X1, and m is integer.
In addition, when judging to learn that the transmission means of this frame is the second transmission means (OFDM PHY transmission means), in order to when estimating channel time domain response, the communication characteristic in each footpath near the front and back having estimated the footpath at synchronous place in communication channel, make channel equalization comparatively accurate, described based on described transmission means, described first correlated series and described second correlated series, obtain the described channel time domain response sequence of described communication channel, be specially:
Based on the top n value in the rear N number of value in described first correlated series and described second correlated series, obtain the second time domain impulse response sequence of described communication channel, wherein, M value is comprised in described first correlated series, M value is comprised in described second correlated series, M is positive integer, and N is the positive integer being less than or equal to M.Specifically, the relevant sequence C v (k) of first relevant sequence C u (k) and second comprises 769 numerical value (i.e. M=769) respectively, rear 257(and N=257 by the first relevant sequence C u (k)) individual value (Cu (512+k), k=0,1, ..., 256) first 257 of sequence C v (k) relevant to second are worth (Cv (k), k=0,1 ..., 256) corresponding to be added again divided by 512, be averaged again afterwards (namely divided by 2), obtain the second time domain impulse response sequences h of communication channel _{2}(k), computing formula is such as formula shown in (f):
Wherein, k=0,1 ..., 256.
Further, in order to when calculating channel frequency response, according to the characteristic of channel, remove and be disturbed larger channel time domain response, and selected part is interferencefree or be disturbed less channel time domain response transform to frequency domain, thus reduce the impact of Noise and Interference on channel frequency response, make channel frequency response more accurate, step S104: selected part sequence from described channel time domain response sequence, channel frequency response sequence is obtained according to described partial sequence, and carry out the first demodulation based on the first Received signal strength described in described channel frequency response sequence pair, obtain the first restituted signal, specifically comprise:
Described partial sequence is chosen from described second time domain impulse response sequence, and obtain described channel frequency response sequence according to described partial sequence, wherein, in described second time domain impulse response sequence, comprise N number of value, comprise P value in described partial sequence, P is the positive integer being less than or equal to N;
Carry out the first demodulation based on the first Received signal strength described in described channel frequency response sequence pair, obtain described first restituted signal.
In specific implementation process, when frame transmission means is the second transmission means, it is by the second time domain impulse response retrieval channel frequency response sequence, and determine channel frequency response sequence, further the specific implementation method that the first demodulation obtains the first restituted signal is carried out to the first Received signal strength, with the specific implementation method that abovementioned frame transmission means is the first transmission means, repeat no longer one by one here.
In addition, in specific implementation process, both signal receiving was carried out by the timedomain response sequence of channel in order to make receiver, frequency response sequence also by channel carries out demodulation, achieve the variation of demodulation mode, in step S103: based on described first correlated series and described second correlated series, after obtaining the channel time domain response sequence of described communication channel, described method also comprises:
Based on described channel time domain response sequence, the second demodulation is carried out to described first Received signal strength, obtain the second restituted signal.
Embodiment two
Based on same inventive concept, the embodiment of the present application additionally provides a kind of electronic equipment, please refer to Fig. 3, and be applied in a communication system, described electronic equipment comprises:
First receiving element 301, for when determining the first leading targeting sequencing and second targeting sequencing of the physical layer frame in the first communication standard, containing first by the communication channel receiving package of described communication system and transmitting and the first Received signal strength of noise signal;
First acquiring unit 302, relevant for described first Received signal strength and described first targeting sequencing are carried out slip, obtain the first correlated series, and it is relevant that described first Received signal strength and described second targeting sequencing are carried out slip, obtains the second correlated series;
Second acquisition unit 303, for based on described first correlated series and described second correlated series, obtains the channel time domain response sequence of described communication channel;
3rd acquiring unit 304, for selected part sequence from described channel time domain response sequence, obtain channel frequency response sequence according to described partial sequence, and carry out the first demodulation based on the first Received signal strength described in described channel frequency response sequence pair, obtain the first restituted signal.
Concrete, in order to the frame format standard of physically based deformation layer frame the first estimated sequence (i.e. partial sequence in the preamble sequence of the first Received signal strength) can be determined from the first Received signal strength, thus physical layer frame form can be made full use of in the first communication protocol standard to carry out channel estimating, described first acquiring unit 302, specifically comprises:
First synchronous subelement, carries out frame synchronization for the frame format standard based on described physical layer frame to described first Received signal strength, to determine the first estimated sequence for channel estimating from described first Received signal strength;
First obtains subelement, it is relevant for described first estimated sequence and described first targeting sequencing are carried out slip, obtain described first correlated series, and it is relevant that described first estimated sequence and described second targeting sequencing are carried out slip, obtains described second correlated series.
Further, in order to based on the first correlated series and the second relevant retrieval communication channel signal transmission means, and carry out communications channel estimation in conjunction with transmission means, described second acquisition unit 303, specifically comprises:
First determines subelement, for based on described first correlated series and described second correlated series, determines the transmission means of described communication channel based on described first communication standard signal transmission;
Second obtains subelement, for based on described transmission means, described first correlated series and described second correlated series, obtains the described channel time domain response sequence of described communication channel.
Concrete, in order to when the first communication standard has multiple frame transmission means, determine the first transmission means, described first determines subelement, specifically comprises:
First acquisition module, for obtaining the mould of the second sequential value in the mould of the First ray value in described first correlated series and described second correlated series;
First judge module, for judge the mould of described First ray value square whether to be greater than the mould of described second sequential value square, obtain the first judged result;
First determination module, for when described first judged result is for being, determines that described transmission means is the first transmission means.
Further, in order to when frame transmission means is the first transmission means, can when estimating channel time domain response, the communication characteristic in each footpath near the front and back having estimated the footpath at synchronous place in communication channel, make channel equalization comparatively accurate, described second obtains subelement, is specially:
Based on the rear N number of value in the top n value in described first correlated series and described second correlated series, obtain the first time domain impulse response sequence of described communication channel, wherein, M value is comprised in described first correlated series, M value is comprised in described second correlated series, M is positive integer, and N is the positive integer being less than or equal to M.
Further, in order to when frame transmission means is the first transmission means, can when calculating channel frequency response, according to the characteristic of channel, remove and be disturbed larger channel time domain response, and selected part be interferencefree or be disturbed less channel time domain response transform to frequency domain, thus reducing the impact of Noise and Interference on channel frequency response, described 3rd acquiring unit 304, specifically comprises:
3rd obtains subelement, for choosing described partial sequence from described first time domain impulse response sequence, and obtain described channel frequency response sequence according to described partial sequence, wherein, N number of value is comprised in described first time domain impulse response sequence, comprise P value in described partial sequence, P is the positive integer being less than or equal to N;
4th obtains subelement, for carrying out the first demodulation based on described channel frequency response to described first Received signal strength, obtains described first restituted signal.
In addition, in order to when the first communication standard has multiple frame transmission means, determine second transmission means different from the first transmission means, described first determines that subelement also comprises:
Second determination module, for judge at described first judge module the mould of described First ray value square whether to be greater than the mould of described second sequential value square, after obtaining the first judged result, when described first judged result is no, determine that described transmission means is second transmission means different from described first transmission means.
Further, in order to when frame transmission means is the second transmission means, can when estimating channel time domain response, the communication characteristic in each footpath near the front and back having estimated the footpath at synchronous place in communication channel, make channel equalization comparatively accurate, described second obtains subelement, is specially:
Based on the top n value in the rear N number of value in described first correlated series and described second correlated series, obtain the second time domain impulse response sequence of described communication channel, wherein, M value is comprised in described first correlated series, M value is comprised in described second correlated series, M is positive integer, and N is the positive integer being less than or equal to M.
Further, in order to when frame transmission means is the second transmission means, can when calculating channel frequency response, according to the characteristic of channel, remove and be disturbed larger channel time domain response, and selected part be interferencefree or be disturbed less channel time domain response transform to frequency domain, thus reducing the impact of Noise and Interference on channel frequency response, described 3rd acquiring unit 304, specifically comprises:
5th obtains subelement, for choosing described partial sequence from described second time domain impulse response sequence, and obtain described channel frequency response sequence according to described partial sequence, wherein, N number of value is comprised in described second time domain impulse response sequence, comprise P value in described partial sequence, P is the positive integer being less than or equal to N;
6th obtains subelement, for carrying out described first demodulation based on the first Received signal strength described in described channel frequency response sequence pair, obtains described first restituted signal.
In specific implementation process, in order to make receiver both carry out signal receiving by the timedomain response sequence of channel, the frequency response sequence also by channel carries out demodulation, achieves the variation of demodulation mode, and described electronic equipment also comprises:
4th acquiring unit, for at described second acquisition unit based on described first correlated series and described second correlated series, after obtaining the channel time domain response sequence of described communication channel, based on described channel time domain response sequence, the second demodulation is carried out to described first Received signal strength, obtain the second restituted signal.
According to description above, abovementioned electronic equipment is used for realizing abovementioned information processing method, so the course of work of this electronic equipment is consistent with one or more embodiments of said method, has just repeated no longer one by one at this.
The one or more technical schemes provided in the embodiment of the present application, at least have following technique effect or advantage:
(1) due in the embodiment of the present application, when determining the first targeting sequencing and second targeting sequencing of the physical layer frame in the first communication standard, containing first by the communication channel receiving package of described communication system and transmitting and the first Received signal strength of noise signal; Described first Received signal strength and described first targeting sequencing are carried out slip relevant, obtain the first correlated series, and it is relevant that described first Received signal strength and described second targeting sequencing are carried out slip, obtains the second correlated series; Based on described first correlated series and described second correlated series, obtain the channel time domain response sequence of described communication channel; Selected part sequence from described channel time domain response sequence, obtains channel frequency response sequence according to described partial sequence, and carries out the first demodulation based on the first Received signal strength described in described channel frequency response sequence pair, obtain the first restituted signal.Visible, communication channel in communication system is when carrying out Signal transmissions according to the first communication standard, receiver is after receiving the first Received signal strength, by the first Received signal strength respectively to the physical layer frame in described first communication standard leading in the first targeting sequencing and the second targeting sequencing to carry out slip relevant, obtain the first correlated series and the second correlated series, and the channel time domain response sequence of described communication channel is tried to achieve based on two correlated serieses, the channel frequency response sequence that can reflect the characteristic of channel is determined again based on described channel time domain response sequence, and the first demodulation is carried out to the first Received signal strength, obtain the first restituted signal, solve the receiver existed in prior art cannot carry out correct demodulation technical problem to the signal of the communication channel from IEEE802.11ad consensus standard received, achieve by providing a kind of communications channel estimation method, make receiver when receiving the signal based on the such as traffic channel of other procotol such as IEEE802.11ad, the transmission characteristic of this channel can be estimated according to the method, and the technique effect of the signal received according to the correctly demodulation of this characteristic of channel.
(2) due in the embodiment of the present application, when acquisition first correlated series and the second correlated series, first the frame format standard based on described physical layer frame carries out frame synchronization to described first Received signal strength, to determine the first estimated sequence for channel estimating from described first Received signal strength; Described first estimated sequence and described first targeting sequencing are carried out slip relevant, obtain described first correlated series, and it is relevant that described first estimated sequence and described second targeting sequencing are carried out slip, obtain described second correlated series, the frame format standard achieving physically based deformation layer frame determines the first estimated sequence (i.e. partial sequence in the preamble sequence of the first Received signal strength) from the first Received signal strength, thus can to make full use of in the first communication protocol standard physical layer frame form to carry out the technique effect of channel estimating.
(3) due in the embodiment of the present application, based on described first correlated series and described second correlated series, obtain in the process of channel time domain response sequence of described communication channel, first based on described first correlated series and described second correlated series, the transmission means of described communication channel based on described first communication standard signal transmission is determined; Then, based on described transmission means, described first correlated series and described second correlated series, obtain the described channel time domain response sequence of described communication channel, achieve based on the first correlated series and the second relevant retrieval communication channel signal transmission means, and carry out the technique effect of communications channel estimation in conjunction with transmission means.
(4) due in the embodiment of the present application, when obtaining the channel time domain response sequence of communication channel based on traffic channel mode, the first correlated series and the second correlated series, the time domain impulse response sequence of communication channel can be obtained based on the first correlated series and the second correlated series, that is, when estimating channel time domain response, the communication characteristic in each footpath near the front and back having estimated the footpath at synchronous place in communication channel, makes channel equalization comparatively accurate.
(5) due in the embodiment of the present application, in selected part sequence from described channel time domain response sequence, channel frequency response sequence is obtained according to described partial sequence, and carry out the first demodulation based on the first Received signal strength described in described channel frequency response sequence pair, obtain in the process of the first restituted signal, can from described channel time domain response sequence selected part sequence as main reference sequences, thus acquisition channel frequency response sequence (when transmission means is the first transmission means, obtains from the first time domain impulse response sequence; When transmission means is the second transmission means, obtain from the second time domain impulse response sequence), the characteristic of channel that receiver can be reflected according to channel frequency response sequence correctly carries out the first demodulation to received signal, that is, when calculating channel frequency response, according to the characteristic of channel, remove and be disturbed larger channel time domain response, and selected part is interferencefree or be disturbed less channel time domain response transform to frequency domain, thus reduce the impact of Noise and Interference on channel frequency response, make channel frequency response more accurate.
(6) due in the embodiment of the present application, after the channel time domain response sequence of acquisition of communication channels, receiver can carry out the second demodulation based on described channel time domain response sequence to described first Received signal strength, obtain the second restituted signal, that is, receiver both carried out signal receiving by the timedomain response sequence of channel, and the frequency response sequence also by channel carries out demodulation, achieves the variation of demodulation mode.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the present invention can adopt in one or more form wherein including the upper computer program implemented of computerusable storage medium (including but not limited to magnetic disc store, CDROM, optical memory etc.) of computer usable program code.
The present invention describes with reference to according to the flow chart of the method for the embodiment of the present invention, equipment (system) and computer program and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can being provided to the processor of allpurpose computer, specialpurpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computer or other programmable data processing device produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be stored in can in the computerreadable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computerreadable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
Specifically, the computer program instructions that information processing method in the embodiment of the present application is corresponding can be stored in CD, hard disk, on the storage mediums such as USB flash disk, when the computer program instructions corresponding with this information processing method in storage medium is read by an electronic equipment or be performed, comprise the steps:
When determining the first targeting sequencing and second targeting sequencing of the physical layer frame in the first communication standard, containing first by the communication channel receiving package of described communication system and transmitting and the first Received signal strength of noise signal;
Described first Received signal strength and described first targeting sequencing are carried out slip relevant, obtain the first correlated series, and it is relevant that described first Received signal strength and described second targeting sequencing are carried out slip, obtains the second correlated series;
Based on described first correlated series and described second correlated series, obtain the channel time domain response sequence of described communication channel;
Selected part sequence from described channel time domain response sequence, obtains channel frequency response sequence according to described partial sequence, and carries out the first demodulation based on the first Received signal strength described in described channel frequency response sequence pair, obtain the first restituted signal.
Optionally, store in described storage medium that described first Received signal strength and described first targeting sequencing are carried out slip is relevant to step, obtain the first correlated series, and it is relevant that described first Received signal strength and described second targeting sequencing are carried out slip, obtain the second correlated series, corresponding computer instruction, being specifically performed in process, specifically comprises the steps:
Frame format standard based on described physical layer frame carries out frame synchronization to described first Received signal strength, to determine the first estimated sequence for channel estimating from described first Received signal strength;
Described first estimated sequence and described first targeting sequencing are carried out slip relevant, obtain described first correlated series, and it is relevant that described first estimated sequence and described second targeting sequencing are carried out slip, obtains described second correlated series.
Optionally, store in described storage medium with step based on described first correlated series and described second correlated series, obtain the channel time domain response sequence of described communication channel, corresponding computer instruction, being specifically performed in process, specifically comprises the steps:
Based on described first correlated series and described second correlated series, determine the transmission means of described communication channel based on described first communication standard signal transmission;
Based on described transmission means, described first correlated series and described second correlated series, obtain the described channel time domain response sequence of described communication channel.
Optionally, store in described storage medium with step based on described first correlated series and described second correlated series, determine the transmission means of described communication channel based on described first communication standard signal transmission, corresponding computer instruction, being specifically performed in process, specifically comprises the steps:
Obtain the mould of the second sequential value in the mould of the First ray value in described first correlated series and described second correlated series;
Judge the mould of described First ray value square whether to be greater than the mould of described second sequential value square, obtain the first judged result;
When described first judged result is for being, determine that described transmission means is the first transmission means.
Optionally, store in described storage medium with step based on described transmission means, described first correlated series and described second correlated series, obtain the described channel time domain response sequence of described communication channel, corresponding computer instruction is specifically being performed in process, is specially following steps:
Based on the rear N number of value in the top n value in described first correlated series and described second correlated series, obtain the first time domain impulse response sequence of described communication channel, wherein, M value is comprised in described first correlated series, M value is comprised in described second correlated series, M is positive integer, and N is the positive integer being less than or equal to M.
Optionally, store in described storage medium with step selected part sequence from described channel time domain response sequence, channel frequency response sequence is obtained according to described partial sequence, and carry out the first demodulation based on the first Received signal strength described in described channel frequency response sequence pair, obtain the first restituted signal, corresponding computer instruction, being specifically performed in process, specifically comprises the steps:
Described partial sequence is chosen from described first time domain impulse response sequence, and obtain described channel frequency response sequence according to described partial sequence, wherein, in described first time domain impulse response sequence, comprise N number of value, comprise P value in described partial sequence, P is the positive integer being less than or equal to N;
Based on described channel frequency response, described first demodulation is carried out to described first Received signal strength, obtain described first restituted signal.
Optionally, other computer instruction is also stored in described storage medium, these computer instructions with step: described judge the mould of described First ray value square whether to be greater than the mould of described second sequential value square, obtaining after computer instruction corresponding to the first judged result is performed and be performed, comprising the steps: when being performed
When described first judged result is no, determine that described transmission means is second transmission means different from described first transmission means.
Optionally, store in described storage medium with step based on described transmission means, described first correlated series and described second correlated series, obtain the described channel time domain response sequence of described communication channel, corresponding computer instruction is specifically being performed in process, is specially following steps:
Based on the top n value in the rear N number of value in described first correlated series and described second correlated series, obtain the second time domain impulse response sequence of described communication channel, wherein, M value is comprised in described first correlated series, M value is comprised in described second correlated series, M is positive integer, and N is the positive integer being less than or equal to M.
Optionally, store in described storage medium with step selected part sequence from described channel time domain response sequence, channel frequency response sequence is obtained according to described partial sequence, and carry out the first demodulation based on the first Received signal strength described in described channel frequency response sequence pair, obtain the first restituted signal, corresponding computer instruction, being specifically performed in process, specifically comprises the steps:
Described partial sequence is chosen from described second time domain impulse response sequence, and obtain described channel frequency response sequence according to described partial sequence, wherein, in described second time domain impulse response sequence, comprise N number of value, comprise P value in described partial sequence, P is the positive integer being less than or equal to N;
Carry out the first demodulation based on the first Received signal strength described in described channel frequency response sequence pair, obtain described first restituted signal.
Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
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