CN103856240A - Signal detection method and device, and receiver - Google Patents
Signal detection method and device, and receiver Download PDFInfo
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- CN103856240A CN103856240A CN201210519387.2A CN201210519387A CN103856240A CN 103856240 A CN103856240 A CN 103856240A CN 201210519387 A CN201210519387 A CN 201210519387A CN 103856240 A CN103856240 A CN 103856240A
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Abstract
The embodiment of the invention provides a signal detection method and device, and a receiver. The method includes the steps of firstly, estimating a channel for transmitting signals to be detected, and obtaining a channel estimation value; secondly, conducting noise detection on the channel, and obtaining channel interference noise; thirdly, obtaining the weight of a balancer for detecting the signals to be detected according to the channel estimation value and the channel interference noise; fourthly, detecting the signals to be detected according to the weight of the balancer, and obtaining the detection result. According to the technical scheme, the influences of the channel interference noises are taken into consideration when the signals are detected, and therefore signal detection performance can be improved.
Description
Technical field
The present invention relates to signal processing technology, relate in particular to a kind of signal detecting method, device and receiver.
Background technology
Along with user is to TD SDMA (Time Division-Synchronous Code DivisionMultiple Access, referred to as TD-SCDMA) increase of system data business demand, its High Speed Uplink Packet access (High Speed Uplink Packet Access, referred to as HSUPA) technology is used widely.For in the more data volume of HSUPA uplink, generally adopting spreading factor (Spread Factor, referred to as SF) is 1 spread spectrum mode, and for up HSUPA business, generally adopts identical networking mode.In order to promote the uplink receiving performance of HSUPA, a kind of effective method is to adopt preferably detection method.
In TD-SCDMA system, the up detection method of HSUPA is to process ZF (Zero Force based on frequency domain at present, referred to as ZF) method for simplifying, be converted into frequency domain data by time domain data, obtain the detected value of transmitted signal at frequency domain, and then the detected value of frequency domain is converted to time domain detected value, although this detection method has reduced the complexity of joint inspection, also reduce joint inspection performance simultaneously.
Summary of the invention
The embodiment of the present invention provides a kind of signal detecting method, device and receiver, in order to improve joint inspection performance.
First aspect provides a kind of signal detecting method, comprising:
The channel that transmits signal to be detected is estimated, obtained channel estimation value;
Described channel is carried out to noise measuring, obtain channel disturbance noise;
According to described channel estimation value and described channel disturbance noise, obtain the equaliser weights that described signal to be detected is detected to use;
According to described equaliser weights, described signal to be detected is carried out to Check processing, obtain testing result.
In the possible implementation of the first of first aspect, described according to described channel estimation value and described channel disturbance noise, obtaining the equaliser weights that described signal to be detected is detected to use comprises: described channel estimation value is carried out to time-frequency conversion, obtain channel estimation in frequency domain value; Described channel disturbance noise is carried out to time-frequency conversion, obtain frequency domain channel interference noise; Use described channel estimation in frequency domain value and described frequency domain channel interference noise to carry out least mean-square error estimation, obtain described equaliser weights.
In conjunction with the possible implementation of the first of first aspect, in the possible implementation of the second of first aspect, the described channel estimation in frequency domain value of described use and described frequency domain channel interference noise carry out least mean-square error estimation, obtain described equaliser weights and comprise:
According to formula
obtain described equaliser weights;
Wherein, W (k) is described equaliser weights;
for described channel estimation in frequency domain value; K=1,2 ..., K, K is the length of described channel estimation in frequency domain value;
for the conjugate transpose of described channel estimation in frequency domain value, σ
2the interference noise power that the described frequency domain channel interference noise of serving as reasons obtains.
In conjunction with the possible implementation of the first of first aspect or first aspect, in the third possible implementation of first aspect, describedly according to described equaliser weights, described signal to be detected is carried out to Check processing, acquisition testing result comprises: described signal to be detected is carried out to time-frequency conversion, obtain frequency domain signal to be detected; According to formula
obtain frequency domain detection result; When described frequency domain detection result is carried out to frequency, conversion, obtains described testing result; Wherein, W (k) is described equaliser weights;
for described frequency domain detection result; Y (k) is described frequency domain signal to be detected.
Second aspect provides a kind of signal supervisory instrument, comprising:
Channel estimating unit, for the channel that transmits signal to be detected is estimated, obtains channel estimation value;
Noise detection unit, for described channel is carried out to noise measuring, obtains channel disturbance noise;
Weight obtains unit, for according to described channel estimation value and described channel disturbance noise, obtains the equaliser weights that described signal to be detected is detected to use;
Detecting unit, for according to described equaliser weights, described signal to be detected being carried out to Check processing, obtains testing result.
In the possible implementation of the first of second aspect, described weight obtains unit and comprises: the first time-frequency modular converter, for described channel estimation value is carried out to time-frequency conversion, obtain channel estimation in frequency domain value, and described channel disturbance noise is carried out to time-frequency conversion, obtain frequency domain channel interference noise; Weight obtains module, for using described channel estimation in frequency domain value and described frequency domain channel interference noise to carry out least mean-square error estimation, obtains described equaliser weights.
In conjunction with the possible implementation of the first of second aspect, in the possible implementation of the second of second aspect, described weight obtains module specifically for according to formula
obtain described equaliser weights;
Wherein, W (k) is described equaliser weights;
for described channel estimation in frequency domain value; K=1,2 ..., K, K is the length of described channel estimation in frequency domain value;
for the conjugate transpose of described channel estimation in frequency domain value, σ
2the interference noise power that the described frequency domain channel interference noise of serving as reasons obtains.
In conjunction with the possible implementation of the first of second aspect or second aspect, in the third possible implementation of second aspect, described detecting unit comprises: the second time-frequency modular converter, for described signal to be detected is carried out to time-frequency conversion, obtains frequency domain signal to be detected; Result obtains module, for according to formula
obtain frequency domain detection result; Frequently modular converter time, changes when described frequency domain detection result is carried out to frequency, obtains described testing result; Wherein, W (k) is described equaliser weights;
for described frequency domain detection result; Y (k) is described frequency domain signal to be detected.
The third aspect provides a kind of signal supervisory instrument, comprising:
Memory, for depositing program;
Processor, be used for carrying out described program, for the channel that transmits signal to be detected is estimated, obtain channel estimation value, described channel is carried out to noise measuring, obtain channel disturbance noise, according to described channel estimation value and described channel disturbance noise, obtain the equaliser weights that described signal to be detected is detected to use, according to described equaliser weights, described signal to be detected is carried out to Check processing, obtain testing result.
Fourth aspect provides a kind of receiver, comprises arbitrary signal supervisory instrument that second aspect provides.
From above-mentioned, the embodiment of the present invention is by estimating the channel that transmits signal to be detected, obtain channel estimation value, and this signal is carried out to noise measuring, obtain channel disturbance noise, then use channel estimation value and channel disturbance noise, the equaliser weights of use is treated detection signal and is detected in acquisition, using this equaliser weights to treat detection signal detects, thereby acquisition testing result, owing to having taken into full account the impact of interference noise in this process, therefore, can suppress interference noise as far as possible, therefore, can improve the detection performance for the treatment of detection signal, in addition, this testing process is relatively simple, complexity is lower.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The flow chart of a kind of signal detecting method that Fig. 1 provides for the embodiment of the present invention;
Fig. 2 is TD-SCDMA ascending time slot structural representation;
The structural representation of a kind of signal supervisory instrument that Fig. 3 provides for the embodiment of the present invention;
The structural representation of the another kind of signal supervisory instrument that Fig. 4 provides for the embodiment of the present invention;
The structural representation of another signal supervisory instrument that Fig. 5 provides for the embodiment of the present invention.
Embodiment
For making object, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
The flow chart of a kind of signal detecting method that Fig. 1 provides for the embodiment of the present invention.The executive agent of the present embodiment can be Channel Detection device, and this signal supervisory instrument can be arranged in receiver and realize.As shown in Figure 1, the method for the present embodiment comprises:
In the present embodiment, transmitting terminal sends a signal to receiving terminal, the signal that the receiver meeting receiving end/sending end of receiving terminal sends, and this signal is the signal to be detected in the present embodiment.Fig. 2 is TD-SCDMA ascending time slot structural representation.As shown in Figure 2, an ascending time slot of TD-SCDMA is divided into three parts, i.e. the first data division (Data1), pilot tone (Midamble) and the second data division (Data2).Signal to be detected in the present embodiment can be 352 data of the first data division before TD-SCDMA ascending pilot frequency, can be also 352 data of the second data division after TD-SCDMA ascending pilot frequency.In addition, the signal to be detected of the present embodiment can also be the part or all of data in the structure of time slot under other standards.
Signal supervisory instrument is estimated the channel that transmits signal to be detected, obtains channel estimation value, for the signal to be detected receiving is detected to use.Wherein, signal supervisory instrument estimates that to signal the method that obtains channel estimation value can, referring to prior art, not repeat them here.
In the present embodiment, in order to improve the detection performance for the treatment of detection signal, the impact of the noise in the channel of this signal to be detected of consideration transmission, for this reason, signal supervisory instrument also can carry out noise measuring to the channel that transmits signal to be detected, obtains channel disturbance noise.
Obtaining channel estimation value and channel disturbance noise, and receiving after signal to be detected, signal supervisory instrument is processed the channel estimation value and the channel disturbance noise that obtain, obtains the equaliser weights for the treatment of detection signal and detect use; Then, use this equaliser weights to treat detection signal and carry out Check processing, obtain testing result.The testing result is here actually the time domain detected value of the signal that transmitting terminal is sent.
Owing to having taken into full account the impact of interference noise in above-mentioned testing process, therefore, can suppress interference noise as far as possible, therefore can improve the detection performance for the treatment of detection signal; In addition, above-mentioned testing process is relatively simple, is easy to realize, and complexity is lower.
In an optional execution mode, in order further to reduce the complexity of carrying out input, adopt the processing method based on frequency domain.Based on this, a kind of execution mode of step 103 comprises:
Step 1031, channel estimation value is carried out to time-frequency conversion, obtain channel estimation in frequency domain value.
Wherein, signal supervisory instrument estimates the channel that transmits signal to be detected, and the channel estimation value of acquisition belongs to time-domain signal, for example, be n (n).In order to process at frequency domain, signal supervisory instrument carries out time-frequency conversion to the channel estimation value of time domain, and for example N (k)=FFT (n (n)) obtains channel estimation in frequency domain value, wherein, oeprator FFT () represents Fourier transform.Wherein the signal length of n (n) is identical with the signal length of signal to be detected, and the length K of N (k) can be determined according to the signal length of n (n).For example, if signal to be detected is 352 data of the first data division before TD-SCDMA ascending pilot frequency, n=1,2 ..., 312; Accordingly, the length of N (k) can be 512, k=1, and 2 ..., 512, i.e. K=512.
Step 1032, channel disturbance noise is carried out to time-frequency conversion, obtain frequency domain channel interference noise.
Wherein, signal supervisory instrument carries out noise measuring to the channel that transmits signal to be detected, and the channel disturbance noise of acquisition belongs to time-domain signal, for example, be h (n).In order to process at frequency domain, signal supervisory instrument carries out time-frequency conversion to the channel disturbance noise of time domain, and for example H (k)=FFT (h (n)) obtains frequency domain channel interference noise.Wherein the signal length of h (n) is identical with the signal length of signal to be detected, and the length K of H (k) can be determined according to the signal length of h (n).For example, if signal to be detected is 352 data of the first data division before TD-SCDMA ascending pilot frequency, n=1,2 ..., 312; Accordingly, the length of H (k) can be 512, k=1, and 2 ..., 512, i.e. K=512.
Step 1033, the channel estimation in frequency domain value that uses acquisition and frequency domain channel interference noise carry out least mean-square error (Minimum Mean Square Error, referred to as MMSE) to be estimated, obtains equaliser weights.
Optionally, signal supervisory instrument uses the channel estimation in frequency domain value and the frequency domain channel interference noise that obtain to carry out MMSE estimation, can obtain the formula of equaliser weights, i.e. formula (1) below.
Wherein, W (k) is equaliser weights;
for channel estimation in frequency domain value; K=1,2 ..., K, K is the length of channel estimation in frequency domain value, for example, can be 512;
for the conjugate transpose of channel estimation in frequency domain value, σ
2for the interference noise power being obtained by frequency domain channel interference noise.
Based on above-mentioned, signal supervisory instrument specifically can use formula (1), and acquisition is treated detection signal and detected the equaliser weights using.
Based on above-mentioned, a kind of execution mode of step 104 comprises: signal supervisory instrument can be treated detection signal and carry out time-frequency conversion, obtains frequency domain signal to be detected.Concrete, the signal to be detected that signal supervisory instrument directly receives from channel belongs to time-domain signal, for example, be y (n).In order to process at frequency domain, signal supervisory instrument carries out time-frequency conversion to the signal to be detected of time domain, for example Y (k)=FFT (y (n)), obtains frequency domain signal to be detected, and Y (k) is described frequency domain signal to be detected.Then, signal supervisory instrument, according to following formula (2), obtains frequency domain detection result.Obtaining after frequency domain detection result conversion when signal supervisory instrument carries out frequency to frequency domain detection result, the testing result of acquisition time domain.
Wherein,
for frequency domain detection result.Have formula (2) known, signal supervisory instrument directly multiplies each other signal to be detected frequency domain and equaliser weights can obtain frequency domain detection result.
Wherein, conversion when signal supervisory instrument carries out frequency to frequency domain detection result, the testing result that obtains time domain specifically can adopt formula
wherein, oeprator IFFT () represents inverse Fourier transform,
represent the testing result of time domain.
From above-mentioned, the present embodiment utilizes the result of channel estimating and the result that interchannel noise detects, according to MMSE criterion, carry out MMSE estimation, acquisition is treated detection signal and is detected the equaliser weights using, then treat detection signal and detect the signal after output detections, owing to calculating at frequency domain, much smaller the time domain calculating relative to complexity of its amount of calculation, detection efficiency is higher, and take into full account the impact of channel disturbance noise based on MMSE criterion, realize the inhibition to interference noise, therefore, the detection performance of carrying out at frequency domain is unlike the detection poor performance of carrying out in time domain.As can be seen here, the method for the present embodiment, compared with the ZF method based on frequency domain in prior art, has the higher advantage of the performance of detection.
The structural representation of a kind of signal supervisory instrument that Fig. 3 provides for the embodiment of the present invention.As shown in Figure 3, the device of the present embodiment comprises: channel estimating unit 31, noise detection unit 32, weight obtain unit 33 and detecting unit 34.
Weight obtains unit 33, be connected with channel estimating unit 31 and noise detection unit 32, the channel disturbance noise obtaining for the channel estimation value that obtains according to channel estimating unit 31 and noise detection unit 32, obtains the equaliser weights for the treatment of detection signal and detect use.
Detecting unit 34, obtains unit 33 with weight and is connected, and treats detection signal carry out Check processing for the equaliser weights obtaining according to weight acquisition unit 33, obtains testing result.
In an optional execution mode, as shown in Figure 4, a kind of implementation structure that weight obtains unit 33 comprises: the first time-frequency modular converter 331 and weight obtain module 332.
The first time-frequency modular converter 331, be connected with channel estimating unit 31 and noise detection unit 32, carry out time-frequency conversion for the channel estimation value that channel estimating unit 31 is obtained, obtain channel estimation in frequency domain value, and the channel disturbance noise that noise detection unit 32 is obtained carries out time-frequency conversion, acquisition frequency domain channel interference noise.
Weight obtains module 332, is connected with the first time-frequency modular converter 331, for using channel estimation in frequency domain value and the frequency domain channel interference noise that the first time-frequency modular converter 331 obtains to carry out MMSE estimation, obtains equaliser weights.
Optionally, weight obtains module 332 and specifically can be used for according to formula (1), obtains equaliser weights.Description about formula (1) can, referring to embodiment of the method, not repeat them here.
Based on above-mentioned, a kind of implementation structure of detecting unit 34 comprises: modular converter 343 when the second time-frequency modular converter 341, result obtain module 342 and frequency.
The second time-frequency modular converter 341, carries out time-frequency conversion for treating detection signal, obtains frequency domain signal to be detected.
Result obtains module 342, is connected with weight acquisition module 332 and the second time-frequency modular converter 341, for according to formula (2), obtains frequency domain detection result.Description about formula (2) can, referring to embodiment of the method, not repeat them here.
Frequently modular converter 343 time, obtains module 342 with result and is connected, conversion while carrying out frequency for the frequency domain detection result that result acquisition module 342 is obtained, the testing result of acquisition time domain.
Each functional unit of the signal supervisory instrument that the present embodiment provides or module can be used for carrying out the flow process of above-mentioned signal detecting method embodiment, and its specific works principle repeats no more, and refers to the description of embodiment of the method.
The signal supervisory instrument that the present embodiment provides has taken into full account the impact of interference noise on the testing process of signal, therefore, can suppress interference noise as far as possible, therefore can improve the detection performance for the treatment of detection signal; In addition, relatively simple to the testing process of signal, be easy to realize, complexity is lower.Further, the signal supervisory instrument that the present embodiment provides utilizes the result of channel estimating and the result that interchannel noise detects, according to MMSE criterion, carry out MMSE estimation, acquisition is treated detection signal and is detected the equaliser weights using, then treat detection signal and detect the signal after output detections, owing to calculating at frequency domain, much smaller the time domain calculating relative to complexity of its amount of calculation, detection efficiency is higher, and take into full account the impact of channel disturbance noise based on MMSE criterion, realize the inhibition to interference noise, therefore, the detection performance of carrying out at frequency domain is unlike the detection poor performance of carrying out in time domain.
The structural representation of another signal supervisory instrument that Fig. 5 provides for the embodiment of the present invention.As shown in Figure 5, the signal supervisory instrument of the present embodiment comprises: memory 51 and processor 52.
Further, the signal supervisory instrument of the present embodiment also comprises: receiver 53 and transmitter 54.Wherein, receiver 53 is for receiving various signals, the signal to be detected of for example the present embodiment.Transmitter 54 for outwards sending various signals, for example, sends to the signal of terminal equipment etc.Conventionally, transmitter 54 is connected with antenna, by antenna, signal is sent.
In realization, if receiver 53, transmitter 54, memory 51 and the independent realization of processor 52 can interconnect and complete mutual communication by bus.Described bus can be industry standard architecture (Industry Standard Architecture, referred to as ISA) bus, peripheral component interconnect (Peripheral Component, referred to as PCI) bus or extended industry-standard architecture (ExtendedIndustry Standard Architecture, referred to as EISA) bus etc.Described bus can be divided into address bus, data/address bus, control bus etc.For ease of representing, in Fig. 5, only represent with a thick line, but do not represent only to have the bus of a bus or a type.
Optionally, if receiver 53, transmitter 54, memory 51 and processor 52 are integrated on chip piece realize, can complete mutual communication by internal interface.
The signal supervisory instrument that the present embodiment provides can be used for carrying out the flow process of above-mentioned signal detecting method embodiment, and its specific works principle repeats no more, and refers to the description of embodiment of the method.
The signal supervisory instrument that the present embodiment provides has taken into full account the impact of interference noise on the testing process of signal, therefore, can suppress interference noise as far as possible, therefore can improve the detection performance for the treatment of detection signal; In addition, relatively simple to the testing process of signal, be easy to realize, complexity is lower.Further, the signal supervisory instrument that the present embodiment provides utilizes the result of channel estimating and the result that interchannel noise detects, according to MMSE criterion, carry out MMSE estimation, acquisition is treated detection signal and is detected the equaliser weights using, then treat detection signal and detect the signal after output detections, owing to calculating at frequency domain, much smaller the time domain calculating relative to complexity of its amount of calculation, detection efficiency is higher, and take into full account the impact of channel disturbance noise based on MMSE criterion, realize the inhibition to interference noise, therefore, the detection performance of carrying out at frequency domain is unlike the detection poor performance of carrying out in time domain.
The embodiment of the present invention provides a kind of receiver, and this receiver comprises the signal supervisory instrument that the above embodiment of the present invention provides, for achieve a butt joint collect mail number detection.Except signal supervisory instrument, the receiver of the present embodiment can also comprise the devices such as antenna.
The receiver of the present embodiment can be used for carrying out the flow process of above-mentioned signal detecting method embodiment equally, same owing to having taken into full account the impact of interference noise on the testing process of signal, therefore, can suppress interference noise as far as possible, therefore can improve the detection performance for the treatment of detection signal; In addition, relatively simple to the testing process of signal, be easy to realize, complexity is lower.
One of ordinary skill in the art will appreciate that: all or part of step that realizes above-mentioned each embodiment of the method can complete by the relevant hardware of program command.Aforesaid program can be stored in a computer read/write memory medium.This program, in the time carrying out, is carried out the step that comprises above-mentioned each embodiment of the method; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CDs.
Finally it should be noted that: above each embodiment, only in order to technical scheme of the present invention to be described, is not intended to limit; Although the present invention is had been described in detail with reference to aforementioned each embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or some or all of technical characterictic is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (10)
1. a signal detecting method, is characterized in that, comprising:
The channel that transmits signal to be detected is estimated, obtained channel estimation value;
Described channel is carried out to noise measuring, obtain channel disturbance noise;
According to described channel estimation value and described channel disturbance noise, obtain the equaliser weights that described signal to be detected is detected to use;
According to described equaliser weights, described signal to be detected is carried out to Check processing, obtain testing result.
2. signal detecting method according to claim 1, is characterized in that, described according to described channel estimation value and described channel disturbance noise, obtains the equaliser weights that described signal to be detected is detected to use and comprises:
Described channel estimation value is carried out to time-frequency conversion, obtain channel estimation in frequency domain value;
Described channel disturbance noise is carried out to time-frequency conversion, obtain frequency domain channel interference noise;
Use described channel estimation in frequency domain value and described frequency domain channel interference noise to carry out least mean-square error estimation, obtain described equaliser weights.
3. signal detecting method according to claim 2, is characterized in that, the described channel estimation in frequency domain value of described use and described frequency domain channel interference noise carry out least mean-square error estimation, obtain described equaliser weights and comprise:
According to formula
obtain described equaliser weights;
Wherein, W (k) is described equaliser weights;
for described channel estimation in frequency domain value; K=1,2 ..., K, K is the length of described channel estimation in frequency domain value;
for the conjugate transpose of described channel estimation in frequency domain value, σ
2the interference noise power that the described frequency domain channel interference noise of serving as reasons obtains.
4. signal detecting method according to claim 1 and 2, is characterized in that, describedly according to described equaliser weights, described signal to be detected is carried out to Check processing, obtains testing result and comprises:
Described signal to be detected is carried out to time-frequency conversion, obtain frequency domain signal to be detected;
According to formula
obtain frequency domain detection result;
When described frequency domain detection result is carried out to frequency, conversion, obtains described testing result;
Wherein, W (k) is described equaliser weights;
for described frequency domain detection result; Y (k) is described frequency domain signal to be detected.
5. a signal supervisory instrument, is characterized in that, comprising:
Channel estimating unit, for the channel that transmits signal to be detected is estimated, obtains channel estimation value;
Noise detection unit, for described channel is carried out to noise measuring, obtains channel disturbance noise;
Weight obtains unit, for according to described channel estimation value and described channel disturbance noise, obtains the equaliser weights that described signal to be detected is detected to use;
Detecting unit, for according to described equaliser weights, described signal to be detected being carried out to Check processing, obtains testing result.
6. signal supervisory instrument according to claim 5, is characterized in that, described weight obtains unit and comprises:
The first time-frequency modular converter, for described channel estimation value is carried out to time-frequency conversion, obtains channel estimation in frequency domain value, and described channel disturbance noise is carried out to time-frequency conversion, obtains frequency domain channel interference noise;
Weight obtains module, for using described channel estimation in frequency domain value and described frequency domain channel interference noise to carry out least mean-square error estimation, obtains described equaliser weights.
7. signal supervisory instrument according to claim 6, is characterized in that,
Described weight obtains module specifically for according to formula
obtain described equaliser weights;
Wherein, W (k) is described equaliser weights;
for described channel estimation in frequency domain value; K=1,2 ..., K, K is the length of described channel estimation in frequency domain value;
for the conjugate transpose of described channel estimation in frequency domain value, σ
2the interference noise power that the described frequency domain channel interference noise of serving as reasons obtains.
8. according to the signal supervisory instrument described in claim 5 or 6, it is characterized in that, described detecting unit comprises:
The second time-frequency modular converter, for described signal to be detected is carried out to time-frequency conversion, obtains frequency domain signal to be detected;
Result obtains module, for according to formula
obtain frequency domain detection result;
Frequently modular converter time, changes when described frequency domain detection result is carried out to frequency, obtains described testing result;
Wherein, W (k) is described equaliser weights;
for described frequency domain detection result; Y (k) is described frequency domain signal to be detected.
9. a signal supervisory instrument, is characterized in that, comprising:
Memory, for depositing program;
Processor, be used for carrying out described program, for the channel that transmits signal to be detected is estimated, obtain channel estimation value, described channel is carried out to noise measuring, obtain channel disturbance noise, according to described channel estimation value and described channel disturbance noise, obtain the equaliser weights that described signal to be detected is detected to use, according to described equaliser weights, described signal to be detected is carried out to Check processing, obtain testing result.
10. a receiver, is characterized in that, comprises the signal supervisory instrument described in claim 5-8 any one.
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Application publication date: 20140611 |