CN103248590B - Determine the method and apparatus of the footpath number of the channel estimation length of equilibrium treatment - Google Patents
Determine the method and apparatus of the footpath number of the channel estimation length of equilibrium treatment Download PDFInfo
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Abstract
The embodiment of the present invention relates to communication technical field, in particular to the method and apparatus of footpath number of channel estimation length determining equilibrium treatment, the problem of the waste of footpath number and the increase of equilibrium treatment complexity may to be caused as the method for the footpath number of the channel estimation length for equilibrium treatment in order to solve the fixing footpath number that adopts 3GPP to recommend.The method of what the embodiment of the present invention provided the determine footpath number of the channel estimation length of equilibrium treatment comprises: the result of the equilibrium treatment of carrying out according to the channel estimation length of the footpath number of the channel estimation length for equilibrium treatment to determine for nearest N time respectively, determine bit error rate value, N is positive integer; The snr value corresponding according to the bit error rate value determined, the signal carrying out self terminal be currently received and signal amplitude value, determine this footpath number for the channel estimation length of equilibrium treatment.The embodiment of the present invention achieves reasonable employment footpath number and reduces the complexity of equilibrium treatment.
Description
Technical field
The present invention relates to communication technical field, particularly determine the method and apparatus of the footpath number of the channel estimation length of equilibrium treatment.
Background technology
For up process, base station mainly synchronously processes, equilibrium treatment, the operation such as channel decoding process and tone decoding process.Before equilibrium treatment, need the footpath number of the channel estimation length determining equilibrium treatment, when equilibrium treatment, the footpath number of the channel estimation length determined is used for equilibrium treatment.The fixing footpath number that in prior art, the general 3GPP of employing recommends is as the footpath number of the channel estimation length for equilibrium treatment, and under the scene that interference is less, the channel estimation length that the footpath number adopting footpath number to be less than the channel estimation length of the fixing footpath number that 3GPP recommends carries out effect that equilibrium treatment reaches and the fixing footpath number that adopts 3GPP to recommend carries out the effect that equilibrium treatment reaches and is similar to identical, thus causes the waste of footpath number and the increase of equilibrium treatment complexity.
In sum, the fixing footpath number that current employing 3GPP recommends may cause the waste of footpath number and the increase of equilibrium treatment complexity as the footpath number of the channel estimation length for equilibrium treatment.
Summary of the invention
The embodiment of the present invention provides a kind of method and apparatus determining the footpath number of the channel estimation length of equilibrium treatment, adopt the fixing footpath number of 3GPP recommendation as the footpath number of the channel estimation length for equilibrium treatment in order to solve, the problem of the waste of footpath number and the increase of equilibrium treatment complexity can be caused.
A kind of method determining the footpath number of the channel estimation length of equilibrium treatment provided by the invention, comprising:
The result of the equilibrium treatment of carrying out according to the channel estimation length of the footpath number of the channel estimation length for equilibrium treatment to determine for nearest N time respectively, determine bit error rate value, N is positive integer;
The snr value corresponding according to the bit error rate value determined, the signal carrying out self terminal be currently received and signal amplitude value, determine this footpath number for the channel estimation length of equilibrium treatment.
A kind of equipment determining the footpath number of the channel estimation length of equilibrium treatment provided by the invention, comprising:
Determination module, the result of the equilibrium treatment that the channel estimation length for the footpath number of the channel estimation length for equilibrium treatment determined according to nearest N time respectively carries out, determine bit error rate value, N is positive integer;
Processing module, for according to snr value corresponding to the bit error rate value determined, the signal carrying out self terminal be currently received and signal amplitude value, determines this footpath number for the channel estimation length of equilibrium treatment.
In embodiments of the present invention, the result of the equilibrium treatment of carrying out according to the channel estimation length of the footpath number of the channel estimation length for equilibrium treatment to determine for nearest N time respectively, determine bit error rate value, N is positive integer, and according to the bit error rate value determined, the snr value that the signal carrying out self terminal be currently received is corresponding and signal amplitude value, determine this footpath number for the channel estimation length of equilibrium treatment, due to the physical quantity according to sign channel circumstance quality, such as bit error rate value, the snr value that the signal carrying out self terminal be currently received is corresponding and signal amplitude value, determine this footpath number for the channel estimation length of equilibrium treatment flexibly, thus can realize according to channel circumstance quality, dynamically determine this footpath number for the channel estimation length of equilibrium treatment, thus the complexity of reasonable employment footpath number and reduction equilibrium treatment can be realized, and then improve the performance of communication system.
Accompanying drawing explanation
Fig. 1 is the method flow schematic diagram that the embodiment of the present invention determines the footpath number of the channel estimation length of equilibrium treatment;
Fig. 2 is the method detailed schematic flow sheet that the embodiment of the present invention determines the footpath number of the channel estimation length of equilibrium treatment;
Fig. 3 is embodiment of the present invention burst structure schematic diagram;
Fig. 4 is the device structure schematic diagram that the embodiment of the present invention determines the footpath number of the channel estimation length of equilibrium treatment.
Embodiment
The embodiment of the present invention, the result of the equilibrium treatment of carrying out according to the channel estimation length of the footpath number of the channel estimation length for equilibrium treatment to determine for nearest N time respectively, determine bit error rate value, N is positive integer, and according to the bit error rate value determined, the snr value that the signal carrying out self terminal be currently received is corresponding and signal amplitude value, determine this footpath number for the channel estimation length of equilibrium treatment, due to the physical quantity according to sign channel circumstance quality, such as bit error rate value, the snr value that the signal carrying out self terminal be currently received is corresponding and signal amplitude value, determine this footpath number for the channel estimation length of equilibrium treatment flexibly, thus can realize according to channel circumstance quality, dynamically determine this footpath number for the channel estimation length of equilibrium treatment, thus the complexity of reasonable employment footpath number and reduction equilibrium treatment can be realized, and then improve the performance of communication system.
Below in conjunction with Figure of description, the embodiment of the present invention is described in further detail.
As shown in Figure 1, the method that the embodiment of the present invention determines the footpath number of the channel estimation length of equilibrium treatment comprises the following steps:
Step 101, the result of equilibrium treatment of carrying out according to the channel estimation length of the footpath number of the channel estimation length for equilibrium treatment to determine for nearest N time respectively, determine bit error rate value, N is positive integer;
Step 102, according to snr value corresponding to the bit error rate value determined, the signal carrying out self terminal be currently received and signal amplitude value, determine this footpath number for the channel estimation length of equilibrium treatment.
Preferably, in a step 101, for the channel estimation length of the footpath number of the channel estimation length for equilibrium treatment determined each time recently, need to carry out an equilibrium treatment.
Preferably, in a step 101, the result of the equilibrium treatment of carrying out according to the channel estimation length of the footpath number of the channel estimation length for equilibrium treatment to determine for nearest N time respectively, determine bit error rate value, comprising:
When N is 1, the result of the equilibrium treatment that the channel estimation length of the footpath number of the channel estimation length for equilibrium treatment determined according to the last time carries out, determine the number of the Bit data of mistake in the training sequence that terminal is corresponding, and according to the number of the Bit data of mistake in training sequence corresponding to terminal, determine bit error rate value;
When N is greater than 1, the result of the equilibrium treatment of carrying out for the channel estimation length of the footpath number of the channel estimation length for equilibrium treatment determined each time recently respectively, determines corresponding reference bit error rate value; The N number of reference bit error rate value determined is added and is averaged, obtain bit error rate value.
Wherein, when N is greater than 1, for the result of the equilibrium treatment that the channel estimation length of the footpath number of the channel estimation length for equilibrium treatment determined each time recently carries out, determine that the execution mode of corresponding reference bit error rate value is with when N is 1, the result of the equilibrium treatment that the channel estimation length of the footpath number of the channel estimation length for equilibrium treatment determined according to the last time carries out, determines that the execution mode of bit error rate value is similar.
Preferably, in a step 101, according to the number of times of this equilibrium treatment, the value of N can be determined.
Preferably, in a step 101, according to the number of times of this equilibrium treatment, determine the value of N, comprising:
When this equilibrium treatment is the equilibrium treatment of carrying out for the first time, N does not exist, and namely there is not the footpath number of the channel estimation length for equilibrium treatment determined recently;
When this equilibrium treatment is the equilibrium treatment of carrying out for the second time, the value of N is 1;
When this equilibrium treatment is the equilibrium treatment of carrying out for i-th time, the value of N can be 1 or 2 ... or (i-1), i >=3 and i ∈ positive integer;
Wherein, when can get multiple value for N, can Stochastic choice one value in multiple value at random, also can select maximum, also can select minimum value, specifically can set as required.
In concrete enforcement, in a step 102, any one determines that the method for the snr value that the signal carrying out self terminal that receives is corresponding is all applicable to the present invention.
Preferably, in a step 102, according to the following step, the snr value that the signal carrying out self terminal that receives is corresponding is determined:
Step S1, footpath number according to the signal carrying out self terminal that receives and reference channel estimated length, determine time domain channel response sequence, according to time domain channel response sequence and training sequence corresponding to terminal, determine signal power value, and the training sequence corresponding according to the signal carrying out self terminal received, time domain channel response sequence and terminal, determine noise power-value;
Step S2, according to signal power value and noise power-value, determine the snr value that terminal is corresponding.
Preferably, in step sl, according to the following step, time domain channel response sequence is determined:
Suppose that the signal that terminal sends is x (i), the signal carrying out self terminal received is y (i), and the footpath number of reference channel estimated length is 4, then there is following relational expression between y (i) and x (i):
y(i)=h
10x(i)+h
11x(i-1)+h
12x(i-2)+h
13x(i-3);
y(i+1)=h
10x(i+1)+h
11x(i)+h
12x(i-1)+h
13x(i-2);
Y (i+2)=h
10x (i+2)+h
11x (i+1)+h
12x (i)+h
13x (i-1); ... ... .. formula one
y(i+3)=h
10x(i+3)+h
11x(i+2)+h
12x(i+1)+h
13x(i);
With matrix representation above formula be:
By matrix form both sides premultiplication X simultaneously
h, then above formula is expressed as:
Due to Y
hthe result of X is square formation, thus to invert battle array to above formula, can draw:
Wherein,
for time domain channel response sequence.
Wherein, the footpath number of reference channel estimated length is the number of h in the equation of y (i) and x (i), the value of the footpath number of reference channel estimated length can set as required, such as be set as the fixing footpath number that 3GPP recommends, the footpath number being used for the channel estimation length of equilibrium treatment also the last time can determined is as the footpath number with reference to channel estimation length.
Preferably, in step sl, according to time domain channel response sequence and training sequence corresponding to terminal, determine signal power value, comprising:
According to the convolution of time domain channel response sequence and training sequence corresponding to terminal, obtain reference signal power value; And according to reference signal power value, determine signal power value.
Preferably, according to following formula determination signal power value:
Wherein, s_power is signal power value, s_es (i) is reference signal power value, L is the natural number that value is less than the number of bits that training sequence corresponding to terminal comprises, m is the positive integer that value is less than the number of bits that training sequence corresponding to terminal comprises, wherein, the value of (m+L) is less than the number of bits that training sequence corresponding to terminal comprises.
Preferably, in step sl, the training sequence corresponding according to the signal carrying out self terminal received, time domain channel response sequence and terminal, determine noise power-value, comprising:
According to the convolution of time domain channel response sequence and training sequence corresponding to terminal, obtain reference signal power value, according to the signal carrying out self terminal received and reference signal power value, determine reference noise performance number, and according to reference noise performance number, determine noise power-value.
Preferably, according to following formula determination reference noise performance number:
N_es (i)=y (i)-s_es (i), i=L+1 ~ L+m.......... formula six
Wherein, n_es (i) is reference noise performance number.
Preferably, according to following formula determination noise power-value:
Wherein, n_power is noise power-value.
Preferably, in step s 2, according to signal power value and noise power-value, determine to comprise the snr value that terminal is corresponding:
According to the ratio of signal power value and noise power-value, determine the snr value that terminal is corresponding.
In concrete enforcement, in a step 102, any one determines that the method for the signal amplitude value that the signal carrying out self terminal that receives is corresponding is all applicable to the present invention.
Preferably, in a step 102, determine to comprise the signal amplitude value that the signal carrying out self terminal that receives is corresponding:
Determine the reference signal range value that the signal carrying out self terminal that receives is corresponding;
The weighting in fixed window is long of Reference Signal range value is averaged, the signal amplitude value that the signal carrying out self terminal obtaining receiving is corresponding.
Preferably, in step 102, the snr value corresponding according to the bit error rate value determined, the signal carrying out self terminal be currently received and signal amplitude value, determine this footpath number for the channel estimation length of equilibrium treatment, comprising:
Threshold value corresponding with self respectively to bit error rate value, snr value and signal amplitude value to be compared, and according to comparative result, determine this footpath number for the channel estimation length of equilibrium treatment.
Preferably, threshold value corresponding to bit error rate value can be set to one, also can be set to multiple, the threshold value that snr value is corresponding can be set to one, also can be set to multiple, and threshold value corresponding to signal amplitude value can be set to one, also can be set to multiple, wherein, threshold number corresponding to bit error rate value, the threshold number that the threshold number that snr value is corresponding is corresponding with signal amplitude value can be identical, also can be different.
Preferably, because the threshold value that each amount in bit error rate value, snr value and signal amplitude value is corresponding has countless versions possibility, thus according to comparative result, determine that this performance for the footpath number of the channel estimation length of equilibrium treatment also has countless versions.
Conveniently understand, being specifically introduced enumerating several possible situation below, it should be noted that, several possible situation that the embodiment of the present invention is enumerated be the present invention cannot be exhaustive scheme in a part of scheme.
Embodiment one
Suppose that setting bit error rate value, snr value and each self-corresponding threshold value of signal amplitude value are one, a threshold value corresponding to bit error rate value is the first error thresholds, the threshold value that snr value is corresponding is the first fractional threshold, and a threshold value corresponding to signal amplitude value is the first amplitude threshold.
Preferably, threshold value corresponding with self respectively to bit error rate value, snr value and signal amplitude value is compared, according to comparative result, determines this footpath number for the channel estimation length of equilibrium treatment, comprising:
Situation one, bit error rate value be greater than the first error thresholds or snr value be less than the first fractional threshold or signal amplitude value be less than the first amplitude threshold time, within the scope of the first footpath numerical intervals preset, get a value as this footpath number for the channel estimation length of equilibrium treatment;
Situation two, be not more than the first error thresholds in bit error rate value, and snr value is not less than the first fractional threshold, and when signal amplitude value is not less than the first amplitude threshold, within the scope of the second footpath numerical intervals preset, get a value as this footpath number for the channel estimation length of equilibrium treatment.
Preferably, maximum within the scope of second footpath numerical intervals is less than or equal to the minimum value within the scope of the first footpath numerical intervals, or the minimum value (that is, the first footpath numerical intervals scope and the second footpath numerical intervals range section overlap) be greater than within the scope of the first footpath numerical intervals.
Preferably, for getting a value as this execution mode for the footpath number of the channel estimation length of equilibrium treatment within the scope of the first footpath numerical intervals, can random selecting, maximum can be got, minimum value can be got, can median be got, also can according to the size of corresponding with self the respectively threshold difference of bit error rate value, snr value and signal amplitude value, value within the scope of the first footpath numerical intervals.
In concrete enforcement, within the scope of the second footpath numerical intervals, getting a value, within the scope of the first footpath numerical intervals, to get a value as this execution mode for the footpath number of the channel estimation length of equilibrium treatment and the embodiment of the present invention similar as this execution mode for the footpath number of the channel estimation length of equilibrium treatment, do not repeat them here.
Such as, suppose that the first error thresholds is A1=0.5, the first fractional threshold B1=10, the first amplitude threshold C1=5, the first footpath numerical intervals scope is [5,6], and the second footpath numerical intervals scope is [2,4];
If the bit error rate value determined, snr value and signal amplitude value are respectively 0.6,12,10; Then because bit error rate value is greater than the first error thresholds, in the first footpath numerical intervals scope [5,6] get a maximum in as this footpath number for the channel estimation length of equilibrium treatment, namely choosing this footpath number for the channel estimation length of equilibrium treatment is 6;
If the bit error rate value determined, snr value and signal amplitude value are respectively 0.3,12,10; Then because bit error rate value is not more than the first error thresholds, and snr value is not less than the first fractional threshold, and signal amplitude value is not less than the first amplitude threshold, a minimum value is got as this footpath number for the channel estimation length of equilibrium treatment in the second footpath numerical intervals scope [2,4].
Wherein, the first footpath numerical intervals scope and the second footpath numerical intervals scope can partly overlap, and such as, the first footpath numerical intervals scope is [5,6], and the second footpath numerical intervals scope is [2,5].
Embodiment two
Suppose that setting bit error rate value, snr value and each self-corresponding threshold value of signal amplitude value are two, two threshold values corresponding to bit error rate value are respectively first and second error thresholds, two threshold values that snr value is corresponding are first and second fractional threshold, and two threshold values corresponding to signal amplitude value are first and second amplitude threshold.
Preferably, can according to the second error thresholds, the second fractional threshold and the second amplitude threshold, situation two in embodiment one is divided again, mark off two kinds of situations, second footpath numerical intervals scope can be divided into the second left footpath numerical intervals scope and the second right footpath numerical intervals scope, then according to comparative result, determine this footpath number for the channel estimation length of equilibrium treatment, comprising:
Situation one, bit error rate value be greater than the first error thresholds or snr value be less than the first fractional threshold or signal amplitude value be less than the first amplitude threshold time, within the scope of the first footpath numerical intervals, get a value as this footpath number for the channel estimation length of equilibrium treatment;
Situation two, be not more than the first error thresholds in bit error rate value and be less than the second error thresholds, and snr value is not less than the first fractional threshold and is greater than the second fractional threshold, and when signal amplitude value is not less than the first amplitude threshold and is greater than the second amplitude threshold, within the scope of the second right footpath numerical intervals, get a value as this footpath number for the channel estimation length of equilibrium treatment;
Situation three, be not more than the first error thresholds in bit error rate value and be not less than the second error thresholds, or snr value is not less than the first fractional threshold and is not more than the second fractional threshold, or signal amplitude value is when being not less than the first amplitude threshold and being not more than the second amplitude threshold, within the scope of the second left footpath numerical intervals, get a value as this footpath number for the channel estimation length of equilibrium treatment.
Preferably, the maximum within the scope of the second left footpath numerical intervals is less than or equal to the minimum value within the scope of the first footpath numerical intervals, or is greater than the minimum value within the scope of the first footpath numerical intervals; Maximum within the scope of second right footpath numerical intervals equals the minimum value within the scope of the first footpath numerical intervals.
Preferably, the second error thresholds is less than the first error thresholds, and the second fractional threshold is greater than the first fractional threshold; Second amplitude threshold is greater than the first amplitude threshold.
In concrete enforcement, within the scope of the numerical intervals of footpath, getting a value in embodiment two similar as this execution mode for the footpath number of the channel estimation length of equilibrium treatment as getting a value in this execution mode for the footpath number of the channel estimation length of equilibrium treatment and embodiment one within the scope of the numerical intervals of footpath, not repeating them here.
It should be noted that, can to set threshold value corresponding to bit error rate value is two, snr value is corresponding threshold value be three and threshold value corresponding to signal amplitude value is one, also the execution mode of threshold value corresponding to bit error rate value, snr value and signal amplitude value can be set as other situations, can not be exhaustive at this.
Preferably, the execution mode for threshold value corresponding to setting bit error rate value, snr value and signal amplitude value is different situations, the situation two in embodiment one can be marked off different situations.
For different situations, can be set within the scope of the numerical intervals of footpath and get a value as this footpath number for the channel estimation length of equilibrium treatment, also can for different situations, directly set a value as this footpath number for the channel estimation length of equilibrium treatment, detailed in Example three.
Embodiment three
Suppose that setting bit error rate value, snr value and each self-corresponding threshold value of signal amplitude value are two, two threshold values of bit error rate value (BER) correspondence are respectively B1 and B2(B1>B2), two threshold values that snr value (SNR) is corresponding are respectively S1 and S2(S1>S2), two threshold values of signal amplitude value (Range) correspondence are respectively R1 and R2(R1>R2).
Situation one, when BER>B1 or SNR<S2 or Range<R2, this footpath number for the channel estimation length of equilibrium treatment is A+Y;
Situation two, at BER<B2 and SNR>S1 and Range>R1 time, this footpath number for the channel estimation length of equilibrium treatment is A;
Situation three, when situation one and situation two do not meet, this footpath number for the channel estimation length of equilibrium treatment is A+X;
Wherein, X<Y.
When channel circumstance the poorest (situation one meets), the channel estimation length of the longest footpath number (A+Y) is adopted to be used for equilibrium treatment, when channel circumstance general (situation three meets), the channel estimation length of general long footpath number (A+X) is adopted to be used for equilibrium treatment, when channel circumstance best (situation two meets), the channel estimation length of the shortest footpath number (A) is adopted to be used for equilibrium treatment.
Preferably, for the footpath number of channel estimation length determining equilibrium treatment for the first time, owing to there is not the footpath number of the channel estimation length for equilibrium treatment determined recently, the method that thus embodiment of the present invention determines the footpath number of the channel estimation length of equilibrium treatment also comprises:
When determining the footpath number of channel estimation length of equilibrium treatment for the first time, determine the snr value that the signal carrying out self terminal that is currently received is corresponding and signal amplitude value, and according to the snr value determined and signal amplitude value, determine this footpath number for the channel estimation length of equilibrium treatment.
In concrete enforcement, determine that the execution mode of the snr value that the execution mode of the snr value that the signal carrying out self terminal that receives is corresponding and signal amplitude value is corresponding with the signal carrying out self terminal determining in step 102 to receive and signal amplitude value is similar, do not repeat them here.
Preferably, according to the snr value determined and signal amplitude value, determine this footpath number for the channel estimation length of equilibrium treatment, comprising:
Snr value and corresponding with self the respectively threshold value of signal amplitude value to be compared, and according to comparative result, determine this footpath number for the channel estimation length of equilibrium treatment.
Preferably, the threshold value that snr value is corresponding can be set to one, also can be set to multiple, threshold value corresponding to signal amplitude value can be set to one, also can be set to multiple, wherein, the threshold number that the threshold number that snr value is corresponding is corresponding with signal amplitude value can be identical, also can be different.
Preferably, because the threshold value that each amount in snr value and signal amplitude value is corresponding has countless versions possibility, thus according to comparative result, determine that this performance for the footpath number of the channel estimation length of equilibrium treatment also has countless versions.
Conveniently understand, being specifically introduced enumerating several possible situation below, it should be noted that, several possible situation that the embodiment of the present invention is enumerated be the present invention cannot be exhaustive scheme in a part of scheme.
Execution mode one
Suppose that setting snr value and each self-corresponding threshold value of signal amplitude value are one, the threshold value that snr value is corresponding is the first fractional threshold, and a threshold value corresponding to signal amplitude value is the first amplitude threshold.
Preferably, according to comparative result, determine this footpath number for the channel estimation length of equilibrium treatment, comprising:
Situation one, when snr value is less than the first fractional threshold or signal amplitude value is less than the first amplitude threshold, within the scope of the first footpath numerical intervals preset, get a value as this footpath number for the channel estimation length of equilibrium treatment;
Situation two, when snr value is not less than the first fractional threshold and signal amplitude value is not less than the first amplitude threshold, within the scope of the second footpath numerical intervals preset, get a value as this footpath number for the channel estimation length of equilibrium treatment.
Preferably, the maximum within the scope of the second footpath numerical intervals is less than or equal to the minimum value within the scope of the first footpath numerical intervals, or is greater than the minimum value within the scope of the first footpath numerical intervals.
In concrete enforcement, the execution mode of execution mode one central diameter numerical intervals scope, and within the scope of the numerical intervals of footpath, get the execution mode of a value as this execution mode for the footpath number of the channel estimation length of equilibrium treatment and embodiment one central diameter numerical intervals scope, and it is similar as this execution mode for the footpath number of the channel estimation length of equilibrium treatment to get a value within the scope of the numerical intervals of footpath, does not repeat them here.
Execution mode two
Suppose that setting snr value and each self-corresponding threshold value of signal amplitude value are two, two threshold values that snr value is corresponding are first and second fractional threshold, and two threshold values corresponding to signal amplitude value are first and second amplitude threshold.
For the situation two in execution mode one, can according to the second fractional threshold and the second amplitude threshold, divide again, mark off two kinds of situations, second footpath numerical intervals scope can be divided into the second left footpath numerical intervals scope and the second right footpath numerical intervals scope, then according to comparative result, determine this footpath number for the channel estimation length of equilibrium treatment, comprising:
Situation one, when snr value is less than the first fractional threshold or signal amplitude value is less than the first amplitude threshold, within the scope of the first footpath numerical intervals, get a value as this footpath number for the channel estimation length of equilibrium treatment;
Situation two, be not less than the first fractional threshold at snr value and be greater than the second fractional threshold, and when signal amplitude value is not less than the first amplitude threshold and is greater than the second amplitude threshold, within the scope of the second right footpath numerical intervals, get a value as this footpath number for the channel estimation length of equilibrium treatment;
Situation three, be not less than the first fractional threshold at snr value and be not more than the second fractional threshold, or signal amplitude value is when being not less than the first amplitude threshold and being not more than the second amplitude threshold, within the scope of the second left footpath numerical intervals, get a value as this footpath number for the channel estimation length of equilibrium treatment.
Preferably, the maximum within the scope of the second left footpath numerical intervals is less than or equal to the minimum value within the scope of the first footpath numerical intervals, or is greater than the minimum value within the scope of the first footpath numerical intervals; Maximum within the scope of second right footpath numerical intervals equals the minimum value within the scope of the first footpath numerical intervals.
Preferably, the second fractional threshold is greater than the first fractional threshold; Second amplitude threshold is greater than the first amplitude threshold.
In concrete enforcement, the execution mode of execution mode two central diameter numerical intervals scope, and within the scope of the numerical intervals of footpath, get the execution mode of a value as this execution mode for the footpath number of the channel estimation length of equilibrium treatment and embodiment two central diameter numerical intervals scope, and it is similar as this execution mode for the footpath number of the channel estimation length of equilibrium treatment to get a value within the scope of the numerical intervals of footpath, does not repeat them here.
It should be noted that, can to set threshold value corresponding to snr value be three and threshold value corresponding to signal amplitude value is one, also can set the execution mode of snr value and threshold value corresponding to signal amplitude value as other situations, can not be exhaustive at this.
Preferably, the execution mode for setting snr value and threshold value corresponding to signal amplitude value is different situations, the situation two in execution mode one can be marked off different situations.
For different situations, can be set within the scope of the numerical intervals of footpath and get a value as this footpath number for the channel estimation length of equilibrium treatment, also can for different situations, directly set a value as this footpath number for the channel estimation length of equilibrium treatment, refer to execution mode three.
Execution mode three
Suppose that setting snr value and each self-corresponding threshold value of signal amplitude value are two, two threshold values that snr value (SNR) is corresponding are respectively S1 and S2(S1>S2), two threshold values of signal amplitude value (Range) correspondence are respectively R1 and R2(R1>R2).
Situation one, when SNR<S2 or Range<R2, this footpath number for the channel estimation length of equilibrium treatment is A+Y;
Situation two, at SNR>S1 and Range>R1 time, this footpath number for the channel estimation length of equilibrium treatment is A;
Situation three, when situation one and situation two do not meet, this footpath number for the channel estimation length of equilibrium treatment is A+X;
Wherein, X<Y.
When channel circumstance the poorest (situation one meets), the channel estimation length of the longest footpath number (A+Y) is adopted to be used for equilibrium treatment, when channel circumstance general (situation three meets), the channel estimation length of general long footpath number (A+X) is adopted to be used for equilibrium treatment, when channel circumstance best (situation two meets), the channel estimation length of the shortest footpath number (A) is adopted to be used for equilibrium treatment.
Preferably, the embodiment of the present invention determines the main body of the footpath number of the channel estimation length of equilibrium treatment can be base station, O & M(operation and maintenance) entity or a brand-new equipment.
Determine the method for the footpath number of the channel estimation length of equilibrium treatment to describe the embodiment of the present invention in detail, below for the main body determining the footpath number of the channel estimation length of equilibrium treatment for the base station of GSM standard is introduced.
As shown in Figure 2, the method detailed that the embodiment of the present invention determines the footpath number of the channel estimation length of equilibrium treatment comprises the following steps:
Step 201, for first upward signal carrying out self terminal received, the snr value S1 that first upward signal receiving is corresponding and signal amplitude value R1 is determined in base station;
Step 202, base station, according to S1 and R1 determined, are determined for the first time for the footpath number n1 of the channel estimation length of equilibrium treatment;
The result of the equilibrium treatment that the channel estimation length that step 203, base station are n1 according to the footpath number that nearest 1 time is determined carries out, determine the number of the Bit data of mistake in the training sequence that terminal is corresponding, according to the number of the Bit data of mistake in the training sequence that terminal is corresponding, determine bit error rate value B1;
Wherein, base station is the training sequence that each terminal distribution one comprises 26 Bit datas.
Such as, as shown in Figure 3, TSC represents the training sequence that terminal is corresponding to burst structure corresponding to the base station of GSM standard, comprises 26 Bit datas, and 26 Bit datas that TSC comprises are known data, and the data that block of information comprises are unknown data; The number of the Bit data of mistake in the training sequence that terminal is corresponding according to the result of equilibrium treatment, can be determined in base station, supposes that the number of the Bit data of mistake in the training sequence that terminal is corresponding is 10; Then base station can comprise the Bit data of 10 mistakes according to 26 Bit datas, determines bit error rate value.
Step 204, for second upward signal carrying out self terminal received, the snr value S2 that second upward signal receiving is corresponding and signal amplitude value R2 is determined in base station;
Step 205, base station, according to the B1 determined, S2 and R2 that second upward signal being currently received is corresponding, determine the footpath number n2 of the channel estimation length of equilibrium treatment;
The result of the equilibrium treatment that the channel estimation length that step 206, base station are respectively n1 and n2 according to the footpath number that nearest 2 times are determined carries out, determines bit error rate value B2;
Step 207, for the 3rd upward signal carrying out self terminal received, the snr value S3 that the 3rd upward signal receiving is corresponding and signal amplitude value R3 is determined in base station;
Step 208, base station, according to the B2 determined, the 3rd S3 and R3 that upward signal is corresponding being currently received, determine the footpath number n3 of the channel estimation length of equilibrium treatment;
The result of the equilibrium treatment that the channel estimation length that step 209, base station are respectively n2 and n3 according to the footpath number that nearest 2 times are determined carries out, determines bit error rate value B3;
Preferably, the result of the equilibrium treatment that the channel estimation length that the footpath number that base station also can be determined according to nearest 3 times is respectively n1, n2 and n3 carries out, determines bit error rate value B3.
Step 210, for the 4th upward signal carrying out self terminal received, the snr value S4 that the 4th upward signal receiving is corresponding and signal amplitude value R4 is determined in base station;
Step 211, base station, according to the B3 determined, the 3rd S4 and R4 that upward signal is corresponding being currently received, determine the footpath number n4 of the channel estimation length of equilibrium treatment.
Based on same inventive concept, a kind of equipment determining the footpath number of the channel estimation length of equilibrium treatment is additionally provided in the embodiment of the present invention, the principle of dealing with problems due to this equipment is similar to the method for the embodiment of the present invention, therefore the enforcement of this equipment see the enforcement of method, can repeat part and repeats no more.
Fig. 4 is the device structure schematic diagram that the embodiment of the present invention determines the footpath number of the channel estimation length of equilibrium treatment, and as shown in the figure, the equipment that the embodiment of the present invention determines the footpath number of the channel estimation length of equilibrium treatment comprises:
Determination module 401, the result of the equilibrium treatment that the channel estimation length for the footpath number of the channel estimation length for equilibrium treatment determined according to nearest N time respectively carries out, determine bit error rate value, N is positive integer;
Processing module 402, for according to snr value corresponding to the bit error rate value determined, the signal carrying out self terminal be currently received and signal amplitude value, determines this footpath number for the channel estimation length of equilibrium treatment.
Preferably, processing module 402, specifically for threshold value corresponding with self respectively to bit error rate value, snr value and signal amplitude value being compared, and according to comparative result, determines this footpath number for the channel estimation length of equilibrium treatment.
Preferably, processing module 402, specifically for be greater than in bit error rate value the first error thresholds or snr value be less than the first fractional threshold or signal amplitude value be less than the first amplitude threshold time, within the scope of the first footpath numerical intervals preset, get a value as this footpath number for the channel estimation length of equilibrium treatment.
Preferably, processing module 402, specifically for being not more than the first error thresholds in bit error rate value, and snr value is not less than the first fractional threshold, and when signal amplitude value is not less than the first amplitude threshold, within the scope of the second footpath numerical intervals preset, get a value as this footpath number for the channel estimation length of equilibrium treatment.
Preferably, the maximum within the scope of the second footpath numerical intervals is less than or equal to the minimum value within the scope of the first footpath numerical intervals, or is greater than the minimum value within the scope of the first footpath numerical intervals.
Preferably, the second footpath numerical intervals scope is divided into the second left footpath numerical intervals scope and the second right footpath numerical intervals scope; Processing module 402, specifically for being less than the second error thresholds in bit error rate value, and snr value is greater than the second fractional threshold, and when signal amplitude value is greater than the second amplitude threshold, within the scope of the second right footpath numerical intervals, get a value as this footpath number for the channel estimation length of equilibrium treatment; Bit error rate value be not less than the second error thresholds or snr value be not more than the second fractional threshold or signal amplitude value be not more than the second amplitude threshold time, within the scope of the second left footpath numerical intervals, get a value as this footpath number for the channel estimation length of equilibrium treatment.
Preferably, the maximum within the scope of the second left footpath numerical intervals is less than or equal to the minimum value within the scope of the first footpath numerical intervals, or is greater than the minimum value within the scope of the first footpath numerical intervals; Maximum within the scope of second right footpath numerical intervals equals the minimum value within the scope of the first footpath numerical intervals.
Preferably, the second error thresholds is less than the first error thresholds, and the second fractional threshold is greater than the first fractional threshold; Second amplitude threshold is greater than the first amplitude threshold.
Preferably, processing module 402, specifically for when determining the footpath number of channel estimation length of equilibrium treatment for the first time, determine the snr value that the signal carrying out self terminal that is currently received is corresponding and signal amplitude value, and according to the snr value determined and signal amplitude value, determine this footpath number for the channel estimation length of equilibrium treatment.
Preferably, processing module 402, specifically for snr value and corresponding with self the respectively threshold value of signal amplitude value being compared, and according to comparative result, determines this footpath number for the channel estimation length of equilibrium treatment.
Preferably, processing module 402, specifically for be less than at snr value the first fractional threshold or signal amplitude value be less than the first amplitude threshold time, within the scope of the first footpath numerical intervals preset, get a value as this footpath number for the channel estimation length of equilibrium treatment.
Preferably, processing module 402, specifically for be not less than the first fractional threshold at snr value and signal amplitude value is not less than the first amplitude threshold time, within the scope of the second footpath numerical intervals preset, get a value as this footpath number for the channel estimation length of equilibrium treatment.
Preferably, the maximum within the scope of the second footpath numerical intervals is less than or equal to the minimum value within the scope of the first footpath numerical intervals, or is greater than the minimum value within the scope of the first footpath numerical intervals.
Preferably, the second footpath numerical intervals scope is divided into the second left footpath numerical intervals scope and the second right footpath numerical intervals scope; Processing module 402, specifically for being greater than the second fractional threshold at snr value, and when signal amplitude value is greater than the second amplitude threshold, gets a value as this footpath number for the channel estimation length of equilibrium treatment within the scope of the second right footpath numerical intervals; When snr value is not more than the second fractional threshold or signal amplitude value is not more than the second amplitude threshold, within the scope of the second left footpath numerical intervals, get a value as this footpath number for the channel estimation length of equilibrium treatment.
Preferably, the maximum within the scope of the second left footpath numerical intervals is less than or equal to the minimum value within the scope of the first footpath numerical intervals, or is greater than the minimum value within the scope of the first footpath numerical intervals; Maximum within the scope of second right footpath numerical intervals equals the minimum value within the scope of the first footpath numerical intervals.
Preferably, the second fractional threshold is greater than the first fractional threshold; Second amplitude threshold is greater than the first amplitude threshold.
Preferably, processing module 402, specifically for the footpath number according to the signal carrying out self terminal received and reference channel estimated length, determine time domain channel response sequence, according to time domain channel response sequence and training sequence corresponding to terminal, determine signal power value, the training sequence corresponding according to the signal carrying out self terminal received, time domain channel response sequence and terminal, determines noise power-value; And according to signal power value and noise power-value, determine the snr value that terminal is corresponding.
Preferably, determination module 401, specifically for when N is 1, the result of the equilibrium treatment that the channel estimation length of the footpath number of the channel estimation length for equilibrium treatment determined according to the last time carries out, determine the number of the Bit data of mistake in the training sequence that terminal is corresponding, and according to the number of the Bit data of mistake in training sequence corresponding to terminal, determine bit error rate value; When N is greater than 1, the result of the equilibrium treatment of carrying out for the channel estimation length of the footpath number of the channel estimation length for equilibrium treatment determined each time recently respectively, determines corresponding reference bit error rate value; And the N number of reference bit error rate value addition determined is averaged, obtain bit error rate value.
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 computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, 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 all-purpose computer, special-purpose 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 computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable 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.
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.
Claims (18)
1. determine a method for the footpath number of the channel estimation length of equilibrium treatment, it is characterized in that, the method comprises:
The result of the equilibrium treatment of carrying out according to the channel estimation length of the footpath number of the channel estimation length for equilibrium treatment to determine for nearest N time respectively, determine bit error rate value, N is positive integer;
The snr value corresponding according to the described bit error rate value determined, the signal carrying out self terminal be currently received and signal amplitude value, determine this footpath number for the channel estimation length of equilibrium treatment.
2. the method for claim 1, it is characterized in that, the snr value corresponding according to the described bit error rate value determined, the signal carrying out self terminal be currently received and signal amplitude value, determine this footpath number for the channel estimation length of equilibrium treatment, comprising:
Threshold value corresponding with self respectively to described bit error rate value, snr value and signal amplitude value to be compared, and according to comparative result, determine this footpath number for the channel estimation length of equilibrium treatment.
3. method as claimed in claim 2, is characterized in that, described according to comparative result, determines this footpath number for the channel estimation length of equilibrium treatment, comprising:
Described bit error rate value be greater than the first error thresholds or described snr value be less than the first fractional threshold or signal amplitude value be less than the first amplitude threshold time, within the scope of the first footpath numerical intervals preset, get a value as this footpath number for the channel estimation length of equilibrium treatment.
4. method as claimed in claim 3, is characterized in that, described according to comparative result, determines this footpath number for the channel estimation length of equilibrium treatment, comprising:
The first error thresholds is not more than in described bit error rate value, and described snr value is not less than the first fractional threshold, and when signal amplitude value is not less than the first amplitude threshold, within the scope of the second footpath numerical intervals preset, get a value as this footpath number for the channel estimation length of equilibrium treatment;
Wherein, the maximum within the scope of the second footpath numerical intervals is less than or equal to the minimum value within the scope of the first footpath numerical intervals, or is greater than the minimum value within the scope of the first footpath numerical intervals.
5. method as claimed in claim 4, it is characterized in that, the second footpath numerical intervals scope is divided into the second left footpath numerical intervals scope and the second right footpath numerical intervals scope; Describedly within the scope of the second footpath numerical intervals, get a value as this footpath number for the channel estimation length of equilibrium treatment, comprising:
The second error thresholds is less than in described bit error rate value, and described snr value is greater than the second fractional threshold, and when signal amplitude value is greater than the second amplitude threshold, within the scope of the second right footpath numerical intervals, get a value as this footpath number for the channel estimation length of equilibrium treatment;
Described bit error rate value be not less than the second error thresholds or described snr value be not more than the second fractional threshold or signal amplitude value be not more than the second amplitude threshold time, within the scope of the second left footpath numerical intervals, get a value as this footpath number for the channel estimation length of equilibrium treatment;
Wherein, the second error thresholds is less than the first error thresholds, and the second fractional threshold is greater than the first fractional threshold; Second amplitude threshold is greater than the first amplitude threshold.
6. the method for claim 1, is characterized in that, the method also comprises:
When determining the footpath number of channel estimation length of equilibrium treatment for the first time, determine the snr value that the signal carrying out self terminal that is currently received is corresponding and signal amplitude value, and according to the described snr value determined and signal amplitude value, determine this footpath number for the channel estimation length of equilibrium treatment.
7. method as claimed in claim 6, is characterized in that, according to the described snr value determined and signal amplitude value, determines this footpath number for the channel estimation length of equilibrium treatment, comprising:
Described snr value and corresponding with self the respectively threshold value of signal amplitude value to be compared, and according to comparative result, determine this footpath number for the channel estimation length of equilibrium treatment.
8. method as claimed in claim 7, is characterized in that, described according to comparative result, determines this footpath number for the channel estimation length of equilibrium treatment, comprising:
When described snr value is less than the first fractional threshold or described signal amplitude value is less than the first amplitude threshold, within the scope of the first footpath numerical intervals preset, get a value as this footpath number for the channel estimation length of equilibrium treatment.
9. method as claimed in claim 8, is characterized in that, described according to comparative result, determines this footpath number for the channel estimation length of equilibrium treatment, comprising:
When described snr value is not less than the first fractional threshold and described signal amplitude value is not less than the first amplitude threshold, within the scope of the second footpath numerical intervals preset, get a value as this footpath number for the channel estimation length of equilibrium treatment;
Wherein, the maximum within the scope of the second footpath numerical intervals is less than or equal to the minimum value within the scope of the first footpath numerical intervals, or is greater than the minimum value within the scope of the first footpath numerical intervals.
10. method as claimed in claim 9, it is characterized in that, the second footpath numerical intervals scope is divided into the second left footpath numerical intervals scope and the second right footpath numerical intervals scope; Describedly within the scope of the second footpath numerical intervals, get a value as this footpath number for the channel estimation length of equilibrium treatment, comprising:
Be greater than the second fractional threshold at described snr value, and when signal amplitude value is greater than the second amplitude threshold, within the scope of the second right footpath numerical intervals, get a value as this footpath number for the channel estimation length of equilibrium treatment;
When described snr value is not more than the second fractional threshold or signal amplitude value is not more than the second amplitude threshold, within the scope of the second left footpath numerical intervals, get a value as this footpath number for the channel estimation length of equilibrium treatment;
Wherein, the second fractional threshold is greater than the first fractional threshold; Second amplitude threshold is greater than the first amplitude threshold.
11. as arbitrary in claim 1 ~ 10 as described in method, it is characterized in that, determine to comprise the snr value that the signal carrying out self terminal that receives is corresponding:
According to the footpath number of the signal carrying out self terminal received and reference channel estimated length, determine time domain channel response sequence;
According to time domain channel response sequence and training sequence corresponding to described terminal, determine signal power value; And
The training sequence corresponding according to the described signal carrying out self terminal, time domain channel response sequence and the described terminal received, determines noise power-value;
According to described signal power value and noise power-value, determine the snr value that terminal is corresponding.
12. as arbitrary in claim 1 ~ 10 as described in method, it is characterized in that the result of the equilibrium treatment of carrying out according to the channel estimation length of the footpath number of the channel estimation length for equilibrium treatment to determine for nearest N time is respectively determined bit error rate value, being comprised:
Described N is 1, the result of the equilibrium treatment that the channel estimation length of the footpath number of the channel estimation length for equilibrium treatment determined according to the last time carries out, determine the number of the Bit data of mistake in the training sequence that described terminal is corresponding, and according to the number of the Bit data of mistake in training sequence corresponding to described terminal, determine bit error rate value;
Described N is greater than 1, the result of the equilibrium treatment of carrying out for the channel estimation length of the footpath number of the channel estimation length for equilibrium treatment determined each time recently respectively, determines corresponding reference bit error rate value; The N number of reference bit error rate value determined is added and is averaged, obtain bit error rate value.
13. 1 kinds of equipment determining the footpath number of the channel estimation length of equilibrium treatment, it is characterized in that, this equipment comprises:
Determination module, the result of the equilibrium treatment that the channel estimation length for the footpath number of the channel estimation length for equilibrium treatment determined according to nearest N time respectively carries out, determine bit error rate value, N is positive integer;
Processing module, for according to snr value corresponding to the described bit error rate value determined, the signal carrying out self terminal be currently received and signal amplitude value, determines this footpath number for the channel estimation length of equilibrium treatment.
14. equipment as claimed in claim 13, it is characterized in that, described processing module, specifically for threshold value corresponding with self respectively to described bit error rate value, snr value and signal amplitude value is compared, and according to comparative result, determine this footpath number for the channel estimation length of equilibrium treatment.
15. equipment as claimed in claim 13, it is characterized in that, described processing module, specifically for when determining the footpath number of channel estimation length of equilibrium treatment for the first time, determine the snr value that the signal carrying out self terminal that is currently received is corresponding and signal amplitude value, and according to the described snr value determined and signal amplitude value, determine this footpath number for the channel estimation length of equilibrium treatment.
16. equipment as claimed in claim 15, it is characterized in that, described processing module, specifically for described snr value and corresponding with self the respectively threshold value of signal amplitude value are compared, and according to comparative result, determine this footpath number for the channel estimation length of equilibrium treatment.
17. as arbitrary in claim 13 ~ 16 as described in equipment, it is characterized in that, described processing module, specifically for the footpath number according to the signal carrying out self terminal received and reference channel estimated length, determine time domain channel response sequence, according to time domain channel response sequence and training sequence corresponding to described terminal, determine signal power value, the training sequence corresponding according to the described signal carrying out self terminal, time domain channel response sequence and the described terminal received, determines noise power-value; And according to described signal power value and noise power-value, determine the snr value that terminal is corresponding.
18. as arbitrary in claim 13 ~ 16 as described in equipment, it is characterized in that, described determination module, specifically for when described N is 1, the result of the equilibrium treatment that the channel estimation length of the footpath number of the channel estimation length for equilibrium treatment determined according to the last time carries out, to determine in the training sequence that described terminal is corresponding the number of the Bit data of mistake, and according to the number of the Bit data of mistake in training sequence corresponding to described terminal, determine bit error rate value; When described N is greater than 1, the result of the equilibrium treatment of carrying out for the channel estimation length of the footpath number of the channel estimation length for equilibrium treatment determined each time recently respectively, determines corresponding reference bit error rate value; And the N number of reference bit error rate value addition determined is averaged, obtain bit error rate value.
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| CN102457450A (en) * | 2011-10-21 | 2012-05-16 | 上海金陵表面贴装有限公司 | Method and device for post-treatment of TD-SCDMA (Time Division-Synchronous Code Division Multiple Access) channel estimation |
| JP5023006B2 (en) * | 2008-07-09 | 2012-09-12 | 日本放送協会 | OFDM signal receiving apparatus and relay apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP5023006B2 (en) * | 2008-07-09 | 2012-09-12 | 日本放送協会 | OFDM signal receiving apparatus and relay apparatus |
| CN102457450A (en) * | 2011-10-21 | 2012-05-16 | 上海金陵表面贴装有限公司 | Method and device for post-treatment of TD-SCDMA (Time Division-Synchronous Code Division Multiple Access) channel estimation |
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