CN103248590A - Method and device for determining path number of channel estimation length used for equilibrium processing - Google Patents
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Abstract
The invention relates to the field of communication technology, particularly to a method for determining a path number of channel estimation length used for equilibrium processing, which aims to solve the problem that the method adopting the fixing path number recommended by 3GPP as the path number of channel estimation length used for equilibrium processing may cause waste of the path number and increase of complexity of equilibrium processing. The method provided by the embodiment of the invention comprises the following steps: determining bit error rate value according to the equilibrium processing results of the path number of channel estimation length used for equilibrium processing performed by the channel estimation length determined recently for n times, wherein n refers to a positive integer; and determining the path number of channel estimation length this time used for equilibrium processing according to the determined bit error rate value, signal-noise ratio and signal amplitude value corresponding to currently received signals from a terminal. The embodiment of the invention realizes the purposes of reasonably using the path number and reducing complexity of equilibrium processing.
Description
Technical field
The present invention relates to communication technical field, particularly be identified for the method and apparatus of footpath number of the channel estimating length of equilibrium treatment.
Background technology
At up process, mainly handle synchronously the base station, equilibrium treatment, channel decoding are handled and operation such as tone decoding processing.Before equilibrium treatment, need be identified for the footpath number of the channel estimating length of equilibrium treatment, when equilibrium treatment, the footpath number of the channel estimating length determined is used for equilibrium treatment.The fixedly footpath number that the general 3GPP of employing recommends in the prior art is as the footpath number of the channel estimating length that is used for equilibrium treatment, and disturbing under the less scene, the footpath number that adopts the footpath number to be less than the channel estimating length of the fixedly footpath number that 3GPP recommends carries out the effect that equilibrium treatment reaches and adopts the channel estimating length of the fixedly footpath number that 3GPP recommends to carry out the effect that equilibrium treatment reaches approximate identical, thereby causes the directly waste of number and the increase of equilibrium treatment complexity.
In sum, the fixedly footpath number of present employing 3GPP recommendation may cause the waste of footpath number and the increase of equilibrium treatment complexity as the footpath number of the channel estimating length that is used for equilibrium treatment.
Summary of the invention
The embodiment of the invention provides a kind of method and apparatus of footpath number of the channel estimating length that is identified for equilibrium treatment, in order to solve to adopt fixedly footpath number that 3GPP recommends as the footpath number of the channel estimating length that is used for equilibrium treatment, can cause the problem of the increase of the waste of footpath number and equilibrium treatment complexity.
The method of the footpath number of a kind of channel estimating length that is identified for equilibrium treatment provided by the invention comprises:
The result of the equilibrium treatment of carrying out according to the channel estimating length of determining for N time recently for the footpath number of the channel estimating length of equilibrium treatment determines the bit error rate value respectively, and N is positive integer;
According to the bit error rate value of determining, snr value and the signal amplitude value of the current signal correspondence of coming self terminal that receives, determine that this is used for the footpath number of the channel estimating length of equilibrium treatment.
The equipment of the footpath number of a kind of channel estimating length that is identified for equilibrium treatment provided by the invention comprises:
Determination module is used for respectively the result of the equilibrium treatment of carrying out according to the channel estimating length of determining for N time recently for the footpath number of the channel estimating length of equilibrium treatment, determines the bit error rate value, and N is positive integer;
Processing module is used for determining that according to the bit error rate value of determining, snr value and the signal amplitude value of the current signal correspondence of coming self terminal that receives this is used for the footpath number of the channel estimating length of equilibrium treatment.
In embodiments of the present invention, the result of the equilibrium treatment of carrying out according to the channel estimating length of determining for N time recently for the footpath number of the channel estimating length of equilibrium treatment determines the bit error rate value respectively, and N is positive integer; And according to the bit error rate value of determining, snr value and the signal amplitude value of the current signal correspondence of coming self terminal that receives, determine that this is used for the footpath number of the channel estimating length of equilibrium treatment, because according to the physical quantity that characterizes the channel circumstance quality, such as the bit error rate value, snr value and the signal amplitude value of the current signal correspondence of coming self terminal that receives, determine that flexibly this is used for the footpath number of the channel estimating length of equilibrium treatment, thereby can realize according to the channel circumstance quality, determine that dynamically this is used for the footpath number of the channel estimating length of equilibrium treatment, thereby can realize rationally using the complexity of footpath number and reduction equilibrium treatment, and then improve the performance of communication system.
Description of drawings
Fig. 1 is identified for the method flow schematic diagram of footpath number of the channel estimating length of equilibrium treatment for the embodiment of the invention;
Fig. 2 is identified for the method detailed schematic flow sheet of footpath number of the channel estimating length of equilibrium treatment for the embodiment of the invention;
Fig. 3 is embodiment of the invention burst structure schematic diagram;
Fig. 4 is identified for the device structure schematic diagram of footpath number of the channel estimating length of equilibrium treatment for the embodiment of the invention.
Embodiment
The embodiment of the invention, the result of the equilibrium treatment of carrying out according to the channel estimating length of determining for N time recently for the footpath number of the channel estimating length of equilibrium treatment determines the bit error rate value respectively, N is positive integer; And according to the bit error rate value of determining, snr value and the signal amplitude value of the current signal correspondence of coming self terminal that receives, determine that this is used for the footpath number of the channel estimating length of equilibrium treatment, because according to the physical quantity that characterizes the channel circumstance quality, such as the bit error rate value, snr value and the signal amplitude value of the current signal correspondence of coming self terminal that receives, determine that flexibly this is used for the footpath number of the channel estimating length of equilibrium treatment, thereby can realize according to the channel circumstance quality, determine that dynamically this is used for the footpath number of the channel estimating length of equilibrium treatment, thereby can realize rationally using the complexity of footpath number and reduction equilibrium treatment, and then improve the performance of communication system.
Below in conjunction with Figure of description the embodiment of the invention is described in further detail.
As shown in Figure 1, the embodiment of the invention method of footpath number that is identified for the channel estimating length of equilibrium treatment comprises the following steps:
The result of step 101, the equilibrium treatment of carrying out according to the channel estimating length of determining for N time recently for the footpath number of the channel estimating length of equilibrium treatment respectively determines the bit error rate value, and N is positive integer;
Step 102, the bit error rate value according to definite, snr value and the signal amplitude value of the current signal correspondence of coming self terminal that receives determine that this is used for the footpath number of the channel estimating length of equilibrium treatment.
Preferably, in step 101, at the channel estimating length of the footpath number of the channel estimating length of determining each time recently that is used for equilibrium treatment, need carry out equilibrium treatment one time.
Preferably, in step 101, the result of the equilibrium treatment of carrying out according to the channel estimating length of determining for N time recently for the footpath number of the channel estimating length of equilibrium treatment determines the bit error rate value respectively, comprising:
It is 1 o'clock at N, the result of the equilibrium treatment that the channel estimating length of the footpath number of the channel estimating length of determining according to the last time that is used for equilibrium treatment is carried out, determine the number of Bit data wrong in the training sequence of terminal correspondence, and according to the number of Bit data wrong in the training sequence of terminal correspondence, determine the bit error rate value;
Greater than 1 o'clock, the result of the equilibrium treatment of carrying out at the channel estimating length of the footpath number of the channel estimating length of determining each time recently that is used for equilibrium treatment determined corresponding reference bit error rate value respectively at N; N of determining is averaged with reference to the addition of bit error rate value, obtains the bit error rate value.
Wherein, at N greater than 1 o'clock, the result of the equilibrium treatment of carrying out at the channel estimating length of the footpath number of the channel estimating length of determining each time recently that is used for equilibrium treatment, determine the execution mode of corresponding reference bit error rate value and be 1 o'clock at N, the result of the equilibrium treatment that the channel estimating length of the footpath number of the channel estimating length of determining according to the last time that is used for equilibrium treatment is carried out determines that the execution mode of bit error rate value is similar.
Preferably, in step 101, can determine the value of N according to the number of times of this equilibrium treatment.
Preferably, in step 101, according to the number of times of this equilibrium treatment, determine the value of N, comprising:
When this equilibrium treatment was the equilibrium treatment of carrying out for the first time, N did not exist, and did not namely have the footpath number of the channel estimating length of determining recently that is used for equilibrium treatment;
When this equilibrium treatment was the equilibrium treatment of carrying out for the second time, the value of N was 1;
When this equilibrium treatment was the equilibrium treatment of carrying out for the i time, the value of N can be 1 or 2 ... or (i-1), i 〉=3 and i ∈ positive integer;
Wherein, can get at N under the situation of a plurality of values, can in a plurality of values, select a value at random at random, also can select maximum, also can select minimum value, specifically can set as required.
In concrete the enforcement, in step 102, anyly determine that the method for the snr value of the signal correspondence of coming self terminal that receives all is applicable to the present invention.
Preferably, in step 102, according to the following step, determine the snr value of the signal correspondence of coming self terminal that receives:
The signal that comes self terminal that step S1, basis receive and the footpath number of reference channel estimated length, determine the time domain channel response sequence, training sequence according to time domain channel response sequence and terminal correspondence, determine the signal power value, and according to the training sequence of the signal that comes self terminal that receives, time domain channel response sequence and terminal correspondence, determine noise power-value;
Step S2, according to signal power value and noise power-value, determine the snr value of terminal correspondence.
Preferably, in step S1, according to the following step, determine the time domain channel response sequence:
Suppose that the signal that terminal sends is x (i), the signal that comes self terminal that receives is y (i), and the footpath number of reference channel estimated length is 4, then has following relational expression between y (i) and the 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);
Represent that with matrix form following formula is:
With matrix form both sides while premultiplication X
H, then following formula is expressed as:
Because Y
HThe result of X is square formation, thereby to the following formula battle array of inverting, can draw:
Wherein,
Be the 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 be set as required, such as being set at the fixedly footpath number that 3GPP recommends, also the footpath number of the channel estimating length that is used for equilibrium treatment that the last time can be determined is as the footpath number of reference channel estimating length.
Preferably, in step S1, according to the training sequence of time domain channel response sequence and terminal correspondence, determine the signal power value, comprising:
Convolution according to the training sequence of time domain channel response sequence and terminal correspondence obtains the reference signal power value; And according to the reference signal power value, determine the signal power value.
Preferably, determine the signal power value according to following formula:
Wherein, s_power is the signal power value, s_es (i) is the reference signal power value, the natural number of the L number of bits that to be value comprise less than the training sequence of terminal correspondence, the positive integer of the m number of bits that to be value comprise less than the training sequence of terminal correspondence, wherein, the number of bits that comprises less than the training sequence of terminal correspondence of value (m+L).
Preferably, in step S1, according to the training sequence of the signal that comes self terminal that receives, time domain channel response sequence and terminal correspondence, determine noise power-value, comprising:
Convolution according to the training sequence of time domain channel response sequence and terminal correspondence, obtain the reference signal power value, according to the signal that comes self terminal that receives and reference signal power value, determine the reference noise performance number, and according to the reference noise performance number, determine noise power-value.
Preferably, determine the reference noise performance number according to following formula:
N_es (i)=y (i)-s_es (i), i=L+1～L+m.......... formula six
Wherein, n_es (i) is the reference noise performance number.
Preferably, determine noise power-value according to following formula:
Wherein, n_power is noise power-value.
Preferably, in step S2, according to signal power value and noise power-value, determine the snr value of terminal correspondence, comprising:
According to the ratio of signal power value and noise power-value, determine the snr value of terminal correspondence.
In concrete the enforcement, in step 102, anyly determine that the method for the signal amplitude value of the signal correspondence of coming self terminal that receives all is applicable to the present invention.
Preferably, in step 102, determine the signal amplitude value of the signal correspondence of coming self terminal that receives, comprising:
Determine the signal corresponding reference signal amplitude value of coming self terminal that receives;
The weighting in fixed window is long of reference signal range value is averaged the signal amplitude value of the signal correspondence of coming self terminal that obtains receiving.
Preferably, in the step 102, according to the bit error rate value of determining, snr value and the signal amplitude value of the current signal correspondence of coming self terminal that receives, determine that this is used for the footpath number of the channel estimating length of equilibrium treatment, comprising:
Bit error rate value, snr value and signal amplitude value are compared with self corresponding threshold respectively, and according to comparative result, determine that this is used for the footpath number of the channel estimating length of equilibrium treatment.
Preferably, bit error rate value corresponding threshold can be set to one, also can be set to a plurality of, the snr value corresponding threshold can be set to one, also can be set to a plurality ofly, and signal amplitude value corresponding threshold can be set to one, also can be set to a plurality of, wherein, bit error rate value corresponding threshold number, snr value corresponding threshold number and signal amplitude value corresponding threshold number can be identical, also can be different.
Preferably, because each the amount corresponding threshold in bit error rate value, snr value and the signal amplitude value has the countless versions possibility, thereby according to comparative result, determine that the performance of the footpath number of the channel estimating length that this is used for equilibrium treatment also has countless versions.
Understand for convenience, will enumerate several possible situations below and be specifically introduced, need to prove, several possible situation that the embodiment of the invention is enumerated be the present invention can't be exhaustive scheme in a part of scheme.
Embodiment one
Suppose to set bit error rate value, snr value and signal amplitude value separately corresponding threshold be one, a threshold value of bit error rate value correspondence is first error thresholds, a threshold value of snr value correspondence is the first ratio threshold value, and a threshold value of signal amplitude value correspondence is first amplitude threshold.
Preferably, bit error rate value, snr value and signal amplitude value are compared with self corresponding threshold respectively, according to comparative result, determine that this is used for the footpath number of the channel estimating length of equilibrium treatment, comprising:
Situation one,, in the first default footpath numerical value interval range, get a value and be used for the footpath number of the channel estimating length of equilibrium treatment as this during less than first amplitude threshold less than the first ratio threshold value or signal amplitude value greater than first error thresholds or snr value in the bit error rate value;
Situation two, be not more than first error thresholds in the bit error rate value, and snr value is not less than the first ratio threshold value, and when the signal amplitude value is not less than first amplitude threshold, in the second default footpath numerical value interval range, gets a value and be used for the footpath number of the channel estimating length of equilibrium treatment as this.
Preferably, maximum in the second footpath numerical value interval range is smaller or equal to the minimum value in the first footpath numerical value interval range, perhaps greater than the minimum value in the first footpath numerical value interval range (that is, the first footpath numerical value interval range and the second footpath numerical value interval range are overlapped).
Preferably, at in the first footpath numerical value interval range, getting a value as this execution mode for the footpath number of the channel estimating length of equilibrium treatment, can picked at random, can get maximum, can get minimum value, can get median, also can according to bit error rate value, snr value and signal amplitude value respectively with the size of self corresponding threshold difference, value in the first footpath numerical value interval range.
In concrete the enforcement, getting a value is used for the channel estimating length of equilibrium treatment as this execution mode and the embodiment of the invention of footpath number in the second footpath numerical value interval range, to get a value in the first footpath numerical value interval range similar as this execution mode for the footpath number of the channel estimating length of equilibrium treatment, do not repeat them here.
Such as, suppose that first error thresholds is A1=0.5, the first ratio threshold value B1=10, the first amplitude threshold C1=5, the first footpath numerical value interval range is [5,6], the second footpath numerical value interval range is [2,4];
If bit error rate value, snr value and the signal amplitude value determined are respectively 0.6,12,10; Then since the bit error rate value greater than first error thresholds, at the first footpath numerical value interval range [5,6] get a maximum in as this footpath number that is used for the channel estimating length of equilibrium treatment, namely choosing this footpath number that is used for the channel estimating length of equilibrium treatment is 6;
If bit error rate value, snr value and the signal amplitude value determined are respectively 0.3,12,10; Then because the bit error rate value is not more than first error thresholds, and snr value is not less than the first ratio threshold value, and the signal amplitude value is not less than first amplitude threshold, in the second footpath numerical value interval range [2,4], get a minimum value and be used for the footpath number of the channel estimating length of equilibrium treatment as this.
Wherein, the first footpath numerical value interval range and the second footpath numerical value interval range can be overlapped, such as, the first footpath numerical value interval range is [5,6], the second footpath numerical value interval range is [2,5].
Embodiment two
Suppose to set bit error rate value, snr value and signal amplitude value separately corresponding threshold be two, two threshold values of bit error rate value correspondence are respectively first and second error thresholds, two threshold values of snr value correspondence are first and second ratio threshold value, and two threshold values of signal amplitude value correspondence are first and second amplitude threshold.
Preferably, can be according to second error thresholds, the second ratio threshold value and second amplitude threshold, situation two among the embodiment one is divided again, mark off two kinds of situations, the second footpath numerical value interval range can be divided into second left side footpath numerical value interval range and the second right footpath numerical value interval range, then according to comparative result, determine that this is used for the footpath number of the channel estimating length of equilibrium treatment, comprising:
Situation one,, in the first footpath numerical value interval range, get a value and be used for the footpath number of the channel estimating length of equilibrium treatment as this during less than first amplitude threshold less than the first ratio threshold value or signal amplitude value greater than first error thresholds or snr value in the bit error rate value;
Situation two, be not more than first error thresholds and less than second error thresholds in the bit error rate value, and snr value is not less than the first ratio threshold value and greater than the second ratio threshold value, and the signal amplitude value is not less than first amplitude threshold and during greater than second amplitude threshold, get a value and be used for the footpath number of the channel estimating length of equilibrium treatment as this in the second right footpath numerical value interval range;
Situation three, be not more than first error thresholds and be not less than second error thresholds in the bit error rate value, or snr value is not less than the first ratio threshold value and is not more than the second ratio threshold value, or the signal amplitude value is got a value and is used for the footpath number of the channel estimating length of equilibrium treatment as this when being not less than first amplitude threshold and being not more than second amplitude threshold in the numerical value interval range of footpath, second left side.
Preferably, the maximum in the numerical value interval range of footpath, second left side is smaller or equal to the minimum value in the first footpath numerical value interval range, perhaps greater than the minimum value in the first footpath numerical value interval range; Maximum in the second right footpath numerical value interval range equals the minimum value in the first footpath numerical value interval range.
Preferably, second error thresholds is less than first error thresholds, and the second ratio threshold value is greater than the first ratio threshold value; Second amplitude threshold is greater than first amplitude threshold.
In concrete the enforcement, getting a value among the embodiment two in the numerical value interval range of footpath, to get a value as this execution mode and embodiment one of footpath number that is used for the channel estimating length of equilibrium treatment in the numerical value interval range of footpath similar as this execution mode for the footpath number of the channel estimating length of equilibrium treatment, do not repeat them here.
Need to prove, can set bit error rate value corresponding threshold and be two, snr value corresponding threshold and be three and signal amplitude value corresponding threshold is one, the execution mode that also can set bit error rate value, snr value and signal amplitude value corresponding threshold is other situations, can not be exhaustive at this.
Preferably, be different situations at the execution mode of setting bit error rate value, snr value and signal amplitude value corresponding threshold, the situation two among the embodiment one can be marked off different situations.
At different situations, can be set in and get a value in the numerical value interval range of footpath as this footpath number for the channel estimating length of equilibrium treatment, also can directly set a value as this footpath number that is used for the channel estimating length of equilibrium treatment at different situations, see embodiment three for details.
Embodiment three
Suppose to set bit error rate value, snr value and signal amplitude value separately corresponding threshold be two, two corresponding threshold values of bit error rate value (BER) are respectively B1 and B2(B1〉B2), two threshold values that snr value (SNR) is corresponding are respectively S1 and S2(S1〉S2), two corresponding threshold values of signal amplitude value (Range) are respectively R1 and R2(R1〉and R2).
Situation one, at BER when B1 or SNR＜S2 or Range＜R2, this footpath number that is used for the channel estimating length of equilibrium treatment is A+Y;
Situation two, at BER＜B2 and SNR S1 and Range during R1, this footpath number that is used for the channel estimating length of equilibrium treatment is A;
Situation three, when situation one and situation two do not satisfy, this footpath number that is used for the channel estimating length of equilibrium treatment is A+X;
Wherein, X＜Y.
When channel circumstance the poorest (situation one satisfies), adopt the channel estimating length of the longest footpath number (A+Y) to be used for equilibrium treatment, when channel circumstance general (situation three satisfies), adopt the channel estimating length of the footpath number (A+X) of general length to be used for equilibrium treatment, when channel circumstance best (situation two satisfies), adopt the channel estimating length of the shortest footpath number (A) to be used for equilibrium treatment.
Preferably, footpath number at the channel estimating length that is identified for equilibrium treatment for the first time, owing to there is not the footpath number of the channel estimating length of determining recently that is used for equilibrium treatment, thereby the method for footpath number that the embodiment of the invention is identified for the channel estimating length of equilibrium treatment also comprises:
When count in the footpath that is identified for the channel estimating length of equilibrium treatment for the first time, determine snr value and the signal amplitude value of the current signal correspondence of coming self terminal that receives, and according to snr value and the signal amplitude value determined, determine that this is used for the footpath number of the channel estimating length of equilibrium treatment.
In concrete the enforcement, the execution mode of determining snr value that the signal that comes self terminal that receives is corresponding and signal amplitude value in the execution mode of determining the snr value of the signal correspondence of coming self terminal that receives and signal amplitude value and the step 102 is similar, does not repeat them here.
Preferably, according to snr value and the signal amplitude value determined, determine that this is used for the footpath number of the channel estimating length of equilibrium treatment, comprising:
Snr value and signal amplitude value are compared with self corresponding threshold respectively, and according to comparative result, determine that this is used for the footpath number of the channel estimating length of equilibrium treatment.
Preferably, the snr value corresponding threshold can be set to one, also can be set to a plurality of, signal amplitude value corresponding threshold can be set to one, also can be set to a plurality of, wherein, snr value corresponding threshold number can be identical with signal amplitude value corresponding threshold number, also can be different.
Preferably, because each the amount corresponding threshold in snr value and the signal amplitude value has the countless versions possibility, thereby according to comparative result, determine that the performance of the footpath number of the channel estimating length that this is used for equilibrium treatment also has countless versions.
Understand for convenience, will enumerate several possible situations below and be specifically introduced, need to prove, several possible situation that the embodiment of the invention is enumerated be the present invention can't be exhaustive scheme in a part of scheme.
Execution mode one
Suppose to set snr value and signal amplitude value separately corresponding threshold be one, a threshold value of snr value correspondence is the first ratio threshold value, a threshold value of signal amplitude value correspondence is first amplitude threshold.
Preferably, according to comparative result, determine that this is used for the footpath number of the channel estimating length of equilibrium treatment, comprising:
Situation one, during less than first amplitude threshold, in the first default footpath numerical value interval range, get a value and be used for the footpath number of the channel estimating length of equilibrium treatment as this less than the first ratio threshold value or signal amplitude value at snr value;
Situation two, when snr value is not less than the first ratio threshold value and signal amplitude value and is not less than first amplitude threshold, in the second default footpath numerical value interval range, get a value and be used for the footpath number of the channel estimating length of equilibrium treatment as this.
Preferably, the maximum in the second footpath numerical value interval range is smaller or equal to the minimum value in the first footpath numerical value interval range, perhaps greater than the minimum value in the first footpath numerical value interval range.
In concrete the enforcement, the execution mode of footpath numerical value interval range in the execution mode one, and in the numerical value interval range of footpath, get a value and be used for execution mode and embodiment one execution mode of numerical value interval range directly of footpath number of the channel estimating length of equilibrium treatment as this, and it is similar as execution mode of footpath number of channel estimating length that this is used for equilibrium treatment to get a value in the numerical value interval range of footpath, does not repeat them here.
Execution mode two
Suppose to set snr value and signal amplitude value separately corresponding threshold be two, two threshold values of snr value correspondence are first and second ratio threshold value, two threshold values of signal amplitude value correspondence are first and second amplitude threshold.
At the situation two in the execution mode one, can be according to the second ratio threshold value and second amplitude threshold, divide again, mark off two kinds of situations, the second footpath numerical value interval range can be divided into second left side footpath numerical value interval range and the second right footpath numerical value interval range, then according to comparative result, determine that this is used for the footpath number of the channel estimating length of equilibrium treatment, comprising:
Situation one, during less than first amplitude threshold, in the first footpath numerical value interval range, get a value and be used for the footpath number of the channel estimating length of equilibrium treatment as this less than the first ratio threshold value or signal amplitude value at snr value;
Situation two, be not less than the first ratio threshold value and greater than the second ratio threshold value at snr value, and the signal amplitude value is not less than first amplitude threshold and during greater than second amplitude threshold, get a value and be used for the footpath number of the channel estimating length of equilibrium treatment as this in the second right footpath numerical value interval range;
Situation three, be not less than the first ratio threshold value and be not more than the second ratio threshold value at snr value, or the signal amplitude value is got a value and is used for the footpath number of the channel estimating length of equilibrium treatment as this when being not less than first amplitude threshold and being not more than second amplitude threshold in the numerical value interval range of footpath, second left side.
Preferably, the maximum in the numerical value interval range of footpath, second left side is smaller or equal to the minimum value in the first footpath numerical value interval range, perhaps greater than the minimum value in the first footpath numerical value interval range; Maximum in the second right footpath numerical value interval range equals the minimum value in the first footpath numerical value interval range.
Preferably, the second ratio threshold value is greater than the first ratio threshold value; Second amplitude threshold is greater than first amplitude threshold.
In concrete the enforcement, the execution mode of footpath numerical value interval range in the execution mode two, and in the numerical value interval range of footpath, get a value and be used for execution mode and embodiment two execution mode of numerical value interval ranges directly of footpath number of the channel estimating length of equilibrium treatment as this, and it is similar as execution mode of footpath number of channel estimating length that this is used for equilibrium treatment to get a value in the numerical value interval range of footpath, does not repeat them here.
Need to prove that can set the snr value corresponding threshold being three is one with signal amplitude value corresponding threshold, the execution mode that also can set snr value and signal amplitude value corresponding threshold is other situations, can not be exhaustive at this.
Preferably, be different situations at the execution mode of setting snr value and signal amplitude value corresponding threshold, the situation two in the execution mode one can be marked off different situations.
At different situations, can be set in and get a value in the numerical value interval range of footpath as this footpath number for the channel estimating length of equilibrium treatment, also can directly set a value as this footpath number that is used for the channel estimating length of equilibrium treatment at different situations, see execution mode three for details.
Execution mode three
Suppose to set snr value and signal amplitude value separately corresponding threshold be two, two threshold values that snr value (SNR) is corresponding are respectively S1 and S2(S1〉S2), two corresponding threshold values of signal amplitude value (Range) are respectively R1 and R2(R1〉R2).
Situation one, when SNR＜S2 or Range＜R2, this footpath number that is used for the channel estimating length of equilibrium treatment is A+Y;
Situation two, at SNR S1 and Range during R1, this footpath number that is used for the channel estimating length of equilibrium treatment is A;
Situation three, when situation one and situation two do not satisfy, this footpath number that is used for the channel estimating length of equilibrium treatment is A+X;
Wherein, X＜Y.
When channel circumstance the poorest (situation one satisfies), adopt the channel estimating length of the longest footpath number (A+Y) to be used for equilibrium treatment, when channel circumstance general (situation three satisfies), adopt the channel estimating length of the footpath number (A+X) of general length to be used for equilibrium treatment, when channel circumstance best (situation two satisfies), adopt the channel estimating length of the shortest footpath number (A) to be used for equilibrium treatment.
Preferably, to be identified for the main body of footpath number of the channel estimating length of equilibrium treatment can be base station, O﹠amp to the embodiment of the invention; M(operation and maintenance) entity or a brand-new equipment.
In order to describe the method for footpath number that the embodiment of the invention is identified for the channel estimating length of equilibrium treatment in detail, be that the base station of GSM standard is that example is introduced with the main body of the footpath number of the channel estimating length that is identified for equilibrium treatment below.
As shown in Figure 2, the embodiment of the invention method detailed of footpath number that is identified for the channel estimating length of equilibrium treatment comprises the following steps:
The result of the equilibrium treatment that the channel estimating length that step 203, base station are n1 according to nearest 1 definite footpath number is carried out, determine the number of Bit data wrong in the training sequence of terminal correspondence, according to the number of Bit data wrong in the training sequence of terminal correspondence, determine bit error rate value B1;
Wherein, the base station is training sequence that comprises 26 Bit datas of each terminal distribution.
Such as, the burst structure of the base station correspondence of GSM standard as shown in Figure 3, TSC represents the training sequence of terminal correspondence, 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 Bit data wrong in the training sequence of terminal correspondence can be determined according to the result of equilibrium treatment in the base station, supposes that the number of Bit data wrong in the training sequence of terminal correspondence is 10; Then the base station can comprise the Bit data of 10 mistakes according to 26 Bit datas, determines the bit error rate value.
The result of the equilibrium treatment that the channel estimating length that step 206, base station are respectively n1 and n2 according to nearest 2 definite footpath numbers is carried out determines bit error rate value B2;
The result of the equilibrium treatment that the channel estimating length that step 209, base station are respectively n2 and n3 according to nearest 2 definite footpath numbers is carried out determines bit error rate value B3;
Preferably, the result of the equilibrium treatment that the base station also can be carried out according to the channel estimating length that nearest 3 definite footpath numbers are respectively n1, n2 and n3 determines bit error rate value B3.
Based on same inventive concept, a kind of equipment of footpath number of the channel estimating length that is identified for equilibrium treatment also is provided in the embodiment of the invention, because the principle that this equipment is dealt with problems is similar to the method for the embodiment of the invention, therefore the enforcement of this equipment can repeat part and repeat no more referring to the enforcement of method.
Fig. 4 is identified for the device structure schematic diagram of footpath number of the channel estimating length of equilibrium treatment for the embodiment of the invention, as shown in the figure, the equipment of footpath number that the embodiment of the invention is identified for the channel estimating length of equilibrium treatment comprises:
Determination module 401 is used for respectively the result of the equilibrium treatment of carrying out according to the channel estimating length of determining for N time recently for the footpath number of the channel estimating length of equilibrium treatment, determines the bit error rate value, and N is positive integer;
Processing module 402 is used for determining that according to the bit error rate value of determining, snr value and the signal amplitude value of the current signal correspondence of coming self terminal that receives this is used for the footpath number of the channel estimating length of equilibrium treatment.
Preferably, processing module 402, concrete being used for compares bit error rate value, snr value and signal amplitude value respectively with self corresponding threshold, and according to comparative result, determines that this is used for the footpath number of the channel estimating length of equilibrium treatment.
Preferably, processing module 402, concrete being used for, gets a value and is used for the footpath number of the channel estimating length of equilibrium treatment as this during less than first amplitude threshold less than the first ratio threshold value or signal amplitude value greater than first error thresholds or snr value in the bit error rate value in the first default footpath numerical value interval range.
Preferably, processing module 402, concrete being used for is not more than first error thresholds in the bit error rate value, and snr value is not less than the first ratio threshold value, and when the signal amplitude value is not less than first amplitude threshold, in the second default footpath numerical value interval range, gets a value and be used for the footpath number of the channel estimating length of equilibrium treatment as this.
Preferably, the maximum in the second footpath numerical value interval range is smaller or equal to the minimum value in the first footpath numerical value interval range, perhaps greater than the minimum value in the first footpath numerical value interval range.
Preferably, the second footpath numerical value interval range is divided into second left side footpath numerical value interval range and the second right footpath numerical value interval range; Processing module 402, concrete being used in the bit error rate value less than second error thresholds, and snr value is greater than the second ratio threshold value, and the signal amplitude value is got a value and is used for the footpath number of the channel estimating length of equilibrium treatment as this during greater than second amplitude threshold in the second right footpath numerical value interval range; When the bit error rate value is not less than second error thresholds or snr value and is not more than the second ratio threshold value or signal amplitude value and is not more than second amplitude threshold, in the numerical value interval range of footpath, second left side, get a value and be used for the footpath number of the channel estimating length of equilibrium treatment as this.
Preferably, the maximum in the numerical value interval range of footpath, second left side is smaller or equal to the minimum value in the first footpath numerical value interval range, perhaps greater than the minimum value in the first footpath numerical value interval range; Maximum in the second right footpath numerical value interval range equals the minimum value in the first footpath numerical value interval range.
Preferably, second error thresholds is less than first error thresholds, and the second ratio threshold value is greater than the first ratio threshold value; Second amplitude threshold is greater than first amplitude threshold.
Preferably, processing module 402, concrete when being used for counting in the footpath that is identified for the channel estimating length of equilibrium treatment for the first time, determine snr value and the signal amplitude value of the current signal correspondence of coming self terminal that receives, and according to snr value and the signal amplitude value determined, determine that this is used for the footpath number of the channel estimating length of equilibrium treatment.
Preferably, processing module 402, concrete being used for compares snr value and signal amplitude value respectively with self corresponding threshold, and according to comparative result, determines that this is used for the footpath number of the channel estimating length of equilibrium treatment.
Preferably, processing module 402, concrete being used for during less than first amplitude threshold, gets a value and is used for the footpath number of the channel estimating length of equilibrium treatment as this less than the first ratio threshold value or signal amplitude value at snr value in the first default footpath numerical value interval range.
Preferably, processing module 402, concrete being used for gets a value and is used for the footpath number of the channel estimating length of equilibrium treatment as this when snr value is not less than the first ratio threshold value and signal amplitude value and is not less than first amplitude threshold in the second default footpath numerical value interval range.
Preferably, the maximum in the second footpath numerical value interval range is smaller or equal to the minimum value in the first footpath numerical value interval range, perhaps greater than the minimum value in the first footpath numerical value interval range.
Preferably, the second footpath numerical value interval range is divided into second left side footpath numerical value interval range and the second right footpath numerical value interval range; Processing module 402, concrete being used at snr value greater than the second ratio threshold value, and the signal amplitude value is got a value and is used for the footpath number of the channel estimating length of equilibrium treatment as this during greater than second amplitude threshold in the second right footpath numerical value interval range; When snr value is not more than the second ratio threshold value or signal amplitude value and is not more than second amplitude threshold, in the numerical value interval range of footpath, second left side, get a value and be used for the footpath number of the channel estimating length of equilibrium treatment as this.
Preferably, the maximum in the numerical value interval range of footpath, second left side is smaller or equal to the minimum value in the first footpath numerical value interval range, perhaps greater than the minimum value in the first footpath numerical value interval range; Maximum in the second right footpath numerical value interval range equals the minimum value in the first footpath numerical value interval range.
Preferably, the second ratio threshold value is greater than the first ratio threshold value; Second amplitude threshold is greater than first amplitude threshold.
Preferably, processing module 402, concrete being used for according to the signal that comes self terminal that receives and the footpath number of reference channel estimated length, determine the time domain channel response sequence, training sequence according to time domain channel response sequence and terminal correspondence, determine the signal power value, according to the training sequence of the signal that comes self terminal that receives, time domain channel response sequence and terminal correspondence, determine noise power-value; And according to signal power value and noise power-value, determine the snr value of terminal correspondence.
Preferably, determination module 401, concrete being used at N is 1 o'clock, the result of the equilibrium treatment that the channel estimating length of the footpath number of the channel estimating length of determining according to the last time that is used for equilibrium treatment is carried out, determine the number of Bit data wrong in the training sequence of terminal correspondence, and according to the number of Bit data wrong in the training sequence of terminal correspondence, determine the bit error rate value; Greater than 1 o'clock, the result of the equilibrium treatment of carrying out at the channel estimating length of the footpath number of the channel estimating length of determining each time recently that is used for equilibrium treatment determined corresponding reference bit error rate value respectively at N; And N of determining be averaged with reference to the addition of bit error rate value, obtain the bit error rate value.
Those skilled in the art should understand that embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt complete hardware embodiment, complete software embodiment or in conjunction with the form of the embodiment of software and hardware aspect.And the present invention can adopt the form of the computer program of implementing in one or more computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) that wherein include computer usable program code.
The present invention is that reference is described according to flow chart and/or the block diagram of method, equipment (system) and the computer program of the embodiment of the invention.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or the block diagram and/or square frame and flow chart and/or the block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, make the instruction of carrying out by the processor of computer or other programmable data processing device produce to be used for the device of the function that is implemented in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame appointments.
These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, make the instruction that is stored in this computer-readable memory produce the manufacture that comprises command device, this command device is implemented in the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
These computer program instructions also can be loaded on computer or other programmable data processing device, make and carry out the sequence of operations step producing computer implemented processing at computer or other programmable devices, thereby be provided for being implemented in the step of the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame in the instruction that computer or other programmable devices are carried out.
Although described the preferred embodiments of the present invention, in a single day those skilled in the art get the basic creative concept of cicada, then can make other change and modification to these embodiment.So claims are intended to all changes and the modification that are interpreted as comprising preferred embodiment and fall into the scope of the invention.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (18)
1. the method for the footpath number of a channel estimating length that is identified for equilibrium treatment is characterized in that this method comprises:
The result of the equilibrium treatment of carrying out according to the channel estimating length of determining for N time recently for the footpath number of the channel estimating length of equilibrium treatment determines the bit error rate value respectively, and N is positive integer;
According to the described bit error rate value of determining, snr value and the signal amplitude value of the current signal correspondence of coming self terminal that receives, determine that this is used for the footpath number of the channel estimating length of equilibrium treatment.
2. the method for claim 1, it is characterized in that, according to the described bit error rate value of determining, snr value and the signal amplitude value of the current signal correspondence of coming self terminal that receives, determine that this is used for the footpath number of the channel estimating length of equilibrium treatment, comprising:
Described bit error rate value, snr value and signal amplitude value are compared with self corresponding threshold respectively, and according to comparative result, determine that this is used for the footpath number of the channel estimating length of equilibrium treatment.
3. method as claimed in claim 2 is characterized in that, and is described according to comparative result, determines that this is used for the footpath number of the channel estimating length of equilibrium treatment, comprising:
, in the first default footpath numerical value interval range, get a value and be used for the footpath number of the channel estimating length of equilibrium treatment as this during less than first amplitude threshold less than the first ratio threshold value or signal amplitude value greater than first error thresholds or described snr value in described bit error rate value.
4. method as claimed in claim 3 is characterized in that, and is described according to comparative result, determines that this is used for the footpath number of the channel estimating length of equilibrium treatment, comprising:
Be not more than first error thresholds in described bit error rate value, and described snr value is not less than the first ratio threshold value, and when the signal amplitude value is not less than first amplitude threshold, in the second default footpath numerical value interval range, gets a value and be used for the footpath number of the channel estimating length of equilibrium treatment as this;
Wherein, the maximum in the second footpath numerical value interval range is smaller or equal to the minimum value in the first footpath numerical value interval range, perhaps greater than the minimum value in the first footpath numerical value interval range.
5. method as claimed in claim 4 is characterized in that, the second footpath numerical value interval range is divided into second left side footpath numerical value interval range and the second right footpath numerical value interval range; Describedly in the second footpath numerical value interval range, get a value as this footpath number that is used for the channel estimating length of equilibrium treatment, comprising:
In described bit error rate value less than second error thresholds, and described snr value is greater than the second ratio threshold value, and the signal amplitude value is got a value and is used for the footpath number of the channel estimating length of equilibrium treatment as this during greater than second amplitude threshold in the second right footpath numerical value interval range;
When described bit error rate value is not less than second error thresholds or described snr value and is not more than the second ratio threshold value or signal amplitude value and is not more than second amplitude threshold, in the numerical value interval range of footpath, second left side, get a value and be used for the footpath number of the channel estimating length of equilibrium treatment as this;
Wherein, second error thresholds is less than first error thresholds, and the second ratio threshold value is greater than the first ratio threshold value; Second amplitude threshold is greater than first amplitude threshold.
6. the method for claim 1 is characterized in that, this method also comprises:
When count in the footpath that is identified for the channel estimating length of equilibrium treatment for the first time, determine snr value and the signal amplitude value of the current signal correspondence of coming self terminal that receives, and according to described snr value and the signal amplitude value determined, determine that this is used for the footpath number of the channel estimating length of equilibrium treatment.
7. method as claimed in claim 6 is characterized in that, according to described snr value and the signal amplitude value determined, determines that this is used for the footpath number of the channel estimating length of equilibrium treatment, comprising:
Described snr value and signal amplitude value are compared with self corresponding threshold respectively, and according to comparative result, determine that this is used for the footpath number of the channel estimating length of equilibrium treatment.
8. method as claimed in claim 7 is characterized in that, and is described according to comparative result, determines that this is used for the footpath number of the channel estimating length of equilibrium treatment, comprising:
During less than first amplitude threshold, in the first default footpath numerical value interval range, get a value and be used for the footpath number of the channel estimating length of equilibrium treatment as this less than the first ratio threshold value or described signal amplitude value at described snr value.
9. method as claimed in claim 8 is characterized in that, and is described according to comparative result, determines that this is used for the footpath number of the channel estimating length of equilibrium treatment, comprising:
When described snr value is not less than the first ratio threshold value and described signal amplitude value and is not less than first amplitude threshold, in the second default footpath numerical value interval range, get a value and be used for the footpath number of the channel estimating length of equilibrium treatment as this;
Wherein, the maximum in the second footpath numerical value interval range is smaller or equal to the minimum value in the first footpath numerical value interval range, perhaps greater than the minimum value in the first footpath numerical value interval range.
10. method as claimed in claim 9 is characterized in that, the second footpath numerical value interval range is divided into second left side footpath numerical value interval range and the second right footpath numerical value interval range; Describedly in the second footpath numerical value interval range, get a value as this footpath number that is used for the channel estimating length of equilibrium treatment, comprising:
Greater than the second ratio threshold value, and the signal amplitude value is got a value and is used for the footpath number of the channel estimating length of equilibrium treatment as this during greater than second amplitude threshold in the second right footpath numerical value interval range at described snr value;
When described snr value is not more than the second ratio threshold value or signal amplitude value and is not more than second amplitude threshold, in the numerical value interval range of footpath, second left side, get a value and be used for the footpath number of the channel estimating length of equilibrium treatment as this;
Wherein, the second ratio threshold value is greater than the first ratio threshold value; Second amplitude threshold is greater than first amplitude threshold.
11. as the arbitrary described method of claim 1～10, it is characterized in that, determine the snr value of the signal correspondence of coming self terminal that receives, comprising:
According to the footpath number of the signal that comes self terminal that receives and reference channel estimated length, determine the time domain channel response sequence;
According to the training sequence of time domain channel response sequence and described terminal correspondence, determine the signal power value; And
According to the training sequence of the described signal that comes self terminal that receives, time domain channel response sequence and described terminal correspondence, determine noise power-value;
According to described signal power value and noise power-value, determine the snr value of terminal correspondence.
12., it is characterized in that the result of the equilibrium treatment of carrying out according to the channel estimating length of determining for N time recently for the footpath number of the channel estimating length of equilibrium treatment determines the bit error rate value respectively, comprising as the arbitrary described method of claim 1～10:
Described N is 1, the result of the equilibrium treatment that the channel estimating length of the footpath number of the channel estimating length of determining according to the last time that is used for equilibrium treatment is carried out, determine the number of Bit data wrong in the training sequence of described terminal correspondence, and according to the number of Bit data wrong in the training sequence of described terminal correspondence, determine the bit error rate value;
Described N is greater than 1, and the result of the equilibrium treatment of carrying out at the channel estimating length of the footpath number of the channel estimating length of determining each time recently that is used for equilibrium treatment determines corresponding reference bit error rate value respectively; N of determining is averaged with reference to the addition of bit error rate value, obtains the bit error rate value.
13. the equipment of the footpath number of a channel estimating length that is identified for equilibrium treatment is characterized in that this equipment comprises:
Determination module is used for respectively the result of the equilibrium treatment of carrying out according to the channel estimating length of determining for N time recently for the footpath number of the channel estimating length of equilibrium treatment, determines the bit error rate value, and N is positive integer;
Processing module is used for determining that according to the described bit error rate value of determining, snr value and the signal amplitude value of the current signal correspondence of coming self terminal that receives this is used for the footpath number of the channel estimating length of equilibrium treatment.
14. equipment as claimed in claim 13, it is characterized in that, described processing module, concrete being used for compares described bit error rate value, snr value and signal amplitude value respectively with self corresponding threshold, and according to comparative result, determine that this is used for the footpath number of the channel estimating length of equilibrium treatment.
15. equipment as claimed in claim 13, it is characterized in that, described processing module, concrete when being used for counting in the footpath that is identified for the channel estimating length of equilibrium treatment for the first time, determine snr value and the signal amplitude value of the current signal correspondence of coming self terminal that receives, and according to described snr value and the signal amplitude value determined, determine that this is used for the footpath number of the channel estimating length of equilibrium treatment.
16. equipment as claimed in claim 15, it is characterized in that, described processing module, concrete being used for compares described snr value and signal amplitude value respectively with self corresponding threshold, and according to comparative result, determine that this is used for the footpath number of the channel estimating length of equilibrium treatment.
17. as the arbitrary described equipment of claim 13～16, it is characterized in that, described processing module, concrete being used for according to the signal that comes self terminal that receives and the footpath number of reference channel estimated length, determine the time domain channel response sequence, according to the training sequence of time domain channel response sequence and described terminal correspondence, determine the signal power value, according to the training sequence of the described signal that comes self terminal that receives, time domain channel response sequence and described terminal correspondence, determine noise power-value; And according to described signal power value and noise power-value, determine the snr value of terminal correspondence.
18. as the arbitrary described equipment of claim 13～16, it is characterized in that, described determination module, concrete being used at described N is 1 o'clock, the result of the equilibrium treatment that the channel estimating length of the footpath number of the channel estimating length of determining according to the last time that is used for equilibrium treatment is carried out, determine the number of Bit data wrong in the training sequence of described terminal correspondence, and according to the number of Bit data wrong in the training sequence of described terminal correspondence, determine the bit error rate value; Greater than 1 o'clock, the result of the equilibrium treatment of carrying out at the channel estimating length of the footpath number of the channel estimating length of determining each time recently that is used for equilibrium treatment determined corresponding reference bit error rate value respectively at described N; And N of determining be averaged with reference to the addition of bit error rate value, obtain the bit error rate value.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20050111538A1 (en) * | 2003-11-11 | 2005-05-26 | Stmicroelectronics N.V. | Method and apparatus for improving the quality of channel estimation algorithms using training sequences |
| 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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| US20050111538A1 (en) * | 2003-11-11 | 2005-05-26 | Stmicroelectronics N.V. | Method and apparatus for improving the quality of channel estimation algorithms using training sequences |
| 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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