CN103813374A - Reference signal received power measurement method, device and terminal - Google Patents

Reference signal received power measurement method, device and terminal Download PDF

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Publication number
CN103813374A
CN103813374A CN201210453380.5A CN201210453380A CN103813374A CN 103813374 A CN103813374 A CN 103813374A CN 201210453380 A CN201210453380 A CN 201210453380A CN 103813374 A CN103813374 A CN 103813374A
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sequence
running time
rsrp
data sequence
frequency resource
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辛雨
倪佳
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ZTE Corp
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ZTE Corp
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Abstract

The invention discloses a reference signal received power measurement method, device and terminal and can improve reference signal received power (RSRP) measurement accuracy. The method includes acquiring M data sequences ym(k) containing pilot frequency information; calculating the main power of a reference signal and noise based on the data sequences; conducting N-stage processing on the data sequences; calculating noise power based on the data sequences subjected to the N-stage processing and calculating an RSRP value based on the main power and the noise power. The device comprises a data sequence acquiring unit, a main power calculating unit, a data sequence N-stage processing unit, a noise power calculation unit and an RSRP calculation unit. The method has the advantages of being simple in operation, small in terminal power consumption, high in noise restraining capability and high in RSRP estimation accuracy under the condition that the signal to noise ratio is low.

Description

A kind of reference signal received power measurement method, device and terminal
Technical field
The present invention relates to the communications field, be specifically related to a kind of Reference Signal Received Power method of measurement, device and the terminal of (Reference signalreceived power is called for short RSRP).
Background technology
LTE (Long Term Evolution, Long Term Evolution) is the 4G radio honeycomb communication technology in (Fourth Generation, the 4th generation).In LTE Release-8, terminal need to be measured the signal power of cell reference signals (reference signal also can the be called pilot signal) CRS (Cell-specific reference signal) receiving, then according to the criterion of base station configuration, report base station after meeting criterion.The power of the CRS signal receiving is RSRP, is defined as the mean value of the resource location Linear power that carries CRS signal in Measurement bandwidth.
Base station can be according to the RSRP of the multiple adjacent areas of the surrounding of terminal to report, select the Serving cell of the maximum community of RSRP value as this terminal, and this terminal of instruction is switched in this Serving cell.Therefore, the precision of terminal measurement RSRP will have influence on the selection of Serving cell.
In LTE Release-10 standard, introduce new channel state information reference signals CSI-RS (Channel-State Information Reference Signal).In traditional cellular communications networks, in certain regional extent, the physical I D (being PCI:Physical Cell Identifier) of community is not identical, like this by measuring the signal strength signal intensity of CRS, the signal that just can tell which community is stronger, just can meet the requirement of switching so measure the RSRP of CRS.But along with the development of communication network, in cellular communications networks in the future, there will be multiple communities to share the situation of PCI, the so only measurement result of the RSRP based on CRS, just cannot realize effective switching.And CSI-RS is UE specific (user equipment specific), the received signal strength of the CSI-RS that network side can report according to UE, determines which community which UE need to be switched to.So it is necessary that the RSRP based on CSI-RS measures in communication network in the future.And in Comp afterwards (Coordinated MultiplePoints, collaborative multicast communication) technology, for the management of Comp measurement set (Comp measuring set), also need to measure based on the RSRP of CSI-RS.The RSRP of CSI-RS also can be referred to as CSI-RSRP.
A difference of CSI-RS and CRS is: CRS sends in each subframe, and CSI-RS only periodically sends in some subframe; And the density of CSI-RS in a subframe will be well below the density of CRS.These features of CSI-RS will have influence on the certainty of measurement of CSI-RSRP, and therefore the certainty of measurement of CSI-RSRP is a problem that needs emphasis to consider.
At present, LTE estimates that based on CRS the algorithm of RSRP is generally: first estimate the channel response coefficient of CRS by channel estimation method, then according to channel response coefficient calculations RSRP.The shortcoming of this algorithm comprises that complexity is higher, and amount of calculation is large, can increase the power consumption of terminal, and in low signal-to-noise ratio situation, the ratio of precision of estimation is lower.Estimate if this algorithm is applied to the measurement of CSI-RSRP, the precision of estimating in low signal-to-noise ratio situation so can be lower.
In order to ensure the certainty of measurement of RSRP of CRS, particularly, in order to improve the certainty of measurement of CSI-RSRP, terminal is necessary to design better RSRP algorithm for estimating.Equally, in other communication systems, also exist the problem that improves pilot power certainty of measurement, need constantly to explore new algorithm for estimating.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of reference signal received power measurement method and device, can improve the certainty of measurement of RSRP.
For solving the problems of the technologies described above, the invention provides a kind of Reference Signal Received Power (RSRP) measurement mechanism, comprise data sequence acquiring unit, gross power computing unit, data sequence N rank processing unit, noise power calculation unit and RSRP computing unit, wherein:
Described data sequence acquiring unit, is listed as for obtaining M the data sequence y that contains pilot frequency information m(k), wherein k is 1 to K minteger sequence number, K mfor data sequence y m(k) length; M is 1 to M integer sequence number, the number that M is data sequence;
Described gross power computing unit, for the gross power Power_Total based on described data sequence computing reference signal and noise;
Described data sequence N rank processing unit, for described data sequence is carried out to the processing of N rank, described N is positive integer;
Described noise power calculation unit, for based on N rank data sequence calculating noise after treatment power P ower_Noise;
Described RSRP computing unit, for based on described gross power and noise power calculation RSRP value.
Further, in described M column data sequence, same row y m(k) include the pilot frequency information of same transmitting antenna port.
Further, same row y m(k) include the pilot frequency information of same transmitting antenna port, refer to:
Same row y m(k) process rear acquisition by the information sequence receiving in the pilot tone running time-frequency resource sequence at same transmitting antenna port.
Further, described data sequence acquiring unit obtains M and is listed as the data sequence y that contains pilot frequency information m(k), comprising:
Described data sequence acquiring unit obtains described M and is listed as the data sequence y that contains pilot frequency information in same subframe m(k); Or
Described data sequence acquiring unit obtains described M row and contains pilot frequency information data sequence y in multiple subframes m(k).
Further, described data sequence acquiring unit obtains M and is listed as the data sequence y that contains pilot frequency information m(k), comprising:
Described data sequence acquiring unit, to the information sequence receiving from the pilot tone running time-frequency resource sequence of same transmitting antenna port, is processed all M column datas of rear acquisition sequences y m(k); Or
Described data sequence acquiring unit, to the information sequence receiving from the pilot tone running time-frequency resource sequence of multiple transmitting antenna ports, is processed all M column datas of rear acquisition sequences y m(k).
Further, described data sequence acquiring unit obtains the data sequence y that 1 row contain pilot frequency information in the following ways m(k):
To the information sequence receiving in the pilot tone running time-frequency resource sequence in the same OFDM symbol different sub carrier of same transmitting antenna port, process rear acquisition one and be listed as y m(k).
Further, received information sequence in the pilot tone running time-frequency resource sequence in the same OFDM symbol different sub carrier of same transmitting antenna port, comprising:
On the same OFDM symbol of same transmitting antenna port, receive the information sequence in the pilot tone running time-frequency resource sequence in different sub carrier according to the order from low frequency to high frequency, or receive the information sequence in the pilot tone running time-frequency resource sequence in different sub carrier according to the order from high frequency to low frequency.
Further, described processing comprises:
Be used in the information sequence receiving in the pilot tone running time-frequency resource sequence of same transmitting antenna port and obtain a row y divided by the pilot frequency information sequence of launching in described pilot tone running time-frequency resource sequence m(k); Or
Be used in the conjugation acquisition one row y that the information sequence receiving in the pilot tone running time-frequency resource sequence of same transmitting antenna port is multiplied by the pilot frequency information sequence of launching in described pilot tone running time-frequency resource sequence m(k).
Further, described data sequence acquiring unit obtains the data sequence y that 1 row contain pilot frequency information in the following ways m(k):
To the information sequence receiving in the pilot tone running time-frequency resource sequence in the two adjacent OFDM symbol different sub carrier at same transmitting antenna port, process rear acquisition one and be listed as y m(k).
Further, described processing comprises:
Be used in the information sequence receiving in the pilot tone running time-frequency resource sequence of same transmitting antenna port and obtain a row y divided by the pilot frequency information sequence of launching in described pilot tone running time-frequency resource sequence m(k); Or
Be used in the conjugation acquisition one row y that the information sequence receiving in the pilot tone running time-frequency resource sequence of same transmitting antenna port is multiplied by the pilot frequency information sequence of launching in described pilot tone running time-frequency resource sequence m(k); Or
Be used in the information sequence receiving in the pilot tone running time-frequency resource sequence of same transmitting antenna port divided by the pilot frequency information sequence of launching in described pilot tone running time-frequency resource sequence after again demultiplexing obtain one row y m(k); Or
Be used in after the conjugation that the information sequence receiving in the pilot tone running time-frequency resource sequence of same transmitting antenna port is multiplied by the pilot frequency information sequence of launching in described pilot tone running time-frequency resource sequence demultiplexing again and obtain a row y m(k); Or
After being used in the information sequence demultiplexing receiving in the pilot tone running time-frequency resource sequence of same transmitting antenna port, obtain a row y divided by the pilot frequency information sequence of launching in described pilot tone running time-frequency resource sequence again m(k); Or
Be used in the conjugation that is multiplied by again the pilot frequency information sequence of launching in described pilot tone running time-frequency resource sequence after the information sequence demultiplexing receiving in the pilot tone running time-frequency resource sequence of same transmitting antenna port and obtain a row y m(k).
Further, all M column data sequences y m(k) length is identical.
Further, described device also comprises and reports unit, reports transmitting terminal for the RSRP value that described RSRP computing unit is calculated.
Further, described data sequence N rank processing unit carries out the processing of N rank to described data sequence, comprising:
Adopt following formula to described data sequence y m(k) carry out the every single order processing in the processing of N rank:
y m(k)′＝y m(k)-y m(k+1)
Wherein, y m(k) ' the data sequence for obtaining after the every single order processing in the processing of N rank, y m(k) data sequence obtaining after processing for upper single order, carrying out the first rank while processing, y m(k) data sequence of obtaining for described data sequence acquiring unit, k is 1 to K mthe integer sequence number of-n, K mthe data sequence y obtaining for described data sequence acquiring unit m(k) length, n represents current exponent number, is 1 to N positive integer.
Further, described noise power calculation unit, based on N rank data sequence calculating noise after treatment power P ower_Noise, comprising:
Described noise power calculation unit adopts following formula calculating noise power P ower_Noise according to described N rank data sequence after treatment:
Power _ Noise = 1 M Σ m = 1 M Σ k = 1 K m - N y m ( k ) ′ × y * m ( k ) ′ L × ( K m - N )
Wherein, L = Σ k = 1 n + 1 ( C ( N , k - 1 ) × C ( N , k - 1 ) ) , C (x, y) is permutation and combination function, y m(k) ' the data sequence for obtaining after the processing of N rank, " * " represents conjugation.
Further, described RSRP computing unit, based on described gross power and noise power calculation RSRP value, comprising:
RSRP＝Power_Total-Power_Noise。
Further, described RSRP computing unit, based on described gross power and noise power calculation RSRP value, comprising:
RSRP (n) value of calculating successively the 1st N rank, rank to the, wherein, n is 1 to N integer, selects last RSRP of monotonically increasing (n) to be worth as RSRP value; Or
Calculate successively RSRP (n) value on the 1st N rank, rank to the, wherein, n is 1 to N integer, in the time that " RSRP (n)-RSRP (n-1) " is less than predetermined threshold value, selects RSRP (n-1) or RSRP (n) as RSRP value.
Further, described device also comprises snr computation unit, for calculating signal to noise ratio snr according to described RSRP value: SNR=RSRP/Power_Noise.
For solving the problems of the technologies described above, the terminal that the present invention also provides one to comprise above-mentioned Reference Signal Received Power (RSRP) measurement mechanism.
For solving the problems of the technologies described above, the present invention also provides a kind of Reference Signal Received Power (RSRP) method of measurement, comprising:
Obtain M and be listed as the data sequence y that contains pilot frequency information m(k), wherein k is 1 to K minteger sequence number, K mfor data sequence y m(k) length; M is 1 to M integer sequence number, the number that M is data sequence;
Based on the gross power Power_Total of described data sequence computing reference signal and noise;
Described data sequence is carried out to the processing of N rank, and described N is positive integer;
Based on N rank data sequence calculating noise after treatment power P ower_Noise;
Based on described gross power and noise power calculation RSRP value.
Further, in described M column data sequence, same row y m(k) include the pilot frequency information of same transmitting antenna port.
Further, same row y m(k) include the pilot frequency information of same transmitting antenna port, refer to:
Same row y m(k) process rear acquisition by the information sequence receiving in the pilot tone running time-frequency resource sequence at same transmitting antenna port.
Further, described in, obtain M and be listed as the data sequence y that contains pilot frequency information m(k), comprising:
In same subframe, obtain described M and be listed as the data sequence y that contains pilot frequency information m(k); Or
In multiple subframes, obtain described M row and contain pilot frequency information data sequence y m(k).
Further, described in, obtain M and be listed as the data sequence y that contains pilot frequency information m(k), comprising:
After being processed, the information sequence receiving from the pilot tone running time-frequency resource sequence of same transmitting antenna port obtains all M column data sequences y m(k); Or
After being processed, the information sequence receiving from the pilot tone running time-frequency resource sequence of multiple transmitting antenna ports obtains all M column data sequences y m(k).
Further, obtain in the following ways the data sequence y that 1 row contain pilot frequency information m(k):
To the information sequence receiving in the pilot tone running time-frequency resource sequence in the same OFDM symbol different sub carrier of same transmitting antenna port, process rear acquisition one and be listed as y m(k).
Further, received information sequence in the pilot tone running time-frequency resource sequence in the same OFDM symbol different sub carrier of same transmitting antenna port, comprising:
On the same OFDM symbol of same transmitting antenna port, receive the information sequence in the pilot tone running time-frequency resource sequence in different sub carrier according to the order from low frequency to high frequency, or receive the information sequence in the pilot tone running time-frequency resource sequence in different sub carrier according to the order from high frequency to low frequency.
Further, described processing comprises:
Be used in the information sequence receiving in the pilot tone running time-frequency resource sequence of same transmitting antenna port and obtain a row y divided by the pilot frequency information sequence of launching in described pilot tone running time-frequency resource sequence m(k); Or
Be used in the same row y of conjugation acquisition that the information sequence receiving in the pilot tone running time-frequency resource sequence of same transmitting antenna port is multiplied by the pilot frequency information sequence of launching in described pilot tone running time-frequency resource sequence m(k).
Further, obtain in the following ways the data sequence y that 1 row contain pilot frequency information m(k):
To the information sequence receiving in the pilot tone running time-frequency resource sequence in the two adjacent OFDM symbol different sub carrier at same transmitting antenna port, process rear acquisition one and be listed as y m(k).
Further, described processing comprises:
Be used in the information sequence receiving in the pilot tone running time-frequency resource sequence of same transmitting antenna port and obtain a row y divided by the pilot frequency information sequence of launching in described pilot tone running time-frequency resource sequence m(k); Or
Be used in the same row y of conjugation acquisition that the information sequence receiving in the pilot tone running time-frequency resource sequence of same transmitting antenna port is multiplied by the pilot frequency information sequence of launching in described pilot tone running time-frequency resource sequence m(k); Or
Be used in the information sequence receiving in the pilot tone running time-frequency resource sequence of same transmitting antenna port divided by the pilot frequency information sequence of launching in described pilot tone running time-frequency resource sequence after again demultiplexing obtain one row y m(k); Or
Be used in after the conjugation that the information sequence receiving in the pilot tone running time-frequency resource sequence of same transmitting antenna port is multiplied by the pilot frequency information sequence of launching in described pilot tone running time-frequency resource sequence demultiplexing again and obtain a row y m(k); Or
After being used in the information sequence demultiplexing receiving in the pilot tone running time-frequency resource sequence of same transmitting antenna port, obtain a row y divided by the pilot frequency information sequence of launching in described pilot tone running time-frequency resource sequence again m(k); Or
Be used in the conjugation that is multiplied by again the pilot frequency information sequence of launching in described pilot tone running time-frequency resource sequence after the information sequence demultiplexing receiving in the pilot tone running time-frequency resource sequence of same transmitting antenna port and obtain a row y m(k).
Further, all M column data sequences y m(k) length is identical.
Further, described method also comprises: the RSRP value of calculating is reported to transmitting terminal.
Further, described described data sequence is carried out to the processing of N rank, comprising:
Adopt following formula to described data sequence y m(k) carry out the every single order processing in the processing of N rank:
y m(k)′＝y m(k)-y m(k+1)
Wherein, y m(k) ' the data sequence for obtaining after the every single order processing in the processing of N rank, y m(k) data sequence obtaining after processing for upper single order, carrying out the first rank while processing, y m(k) data sequence of obtaining for described data sequence acquiring unit, k is 1 to K mthe integer sequence number of-n, K mfor the data sequence y obtaining m(k) length, n represents current exponent number, is 1 to N positive integer.
Further, described based on N rank data sequence calculating noise after treatment power P ower_Noise, comprising:
Adopt following formula calculating noise power P ower_Noise according to described N rank data sequence after treatment:
Power _ Noise = 1 M Σ m = 1 M Σ k = 1 K m - N y m ( k ) ′ × y * m ( k ) ′ L × ( K m - N )
Wherein, L = Σ k = 1 n + 1 ( C ( N , k - 1 ) × C ( N , k - 1 ) ) , C (x, y) is permutation and combination function, y m(k) ' the data sequence for obtaining after the processing of N rank, " * " represents conjugation.
Further, described based on gross power and noise power calculation RSRP value, comprising:
RSRP＝Power_Total-Power_Noise。
Further, described based on gross power and noise power calculation RSRP value, comprising:
RSRP (n) value of calculating successively the 1st N rank, rank to the, wherein, n is 1 to N integer, selects last RSRP of monotonically increasing (n) to be worth as RSRP value; Or
Calculate successively RSRP (n) value on the 1st N rank, rank to the, wherein, n is 1 to N integer, in the time that " RSRP (n)-RSRP (n-1) " is less than predetermined threshold value, selects RSRP (n-1) or RSRP (n) as RSRP value.
Further, described method also comprises: calculate signal to noise ratio snr according to described RSRP value: SNR=RSRP/Power_Noise.
The application's RSRP method of measurement, device and terminal, have that computing is simple, power consumption of terminal is little, to suppress noise ability strong, the high advantage of RSRP estimated accuracy in low signal-to-noise ratio situation.And can between estimated accuracy and computational complexity, carry out Balancing selection.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for specification, is used from explanation the present invention with the specific embodiment of the present invention one, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is embodiment 1 apparatus structure schematic diagram;
Fig. 2 is embodiment 2 schematic flow sheets;
Fig. 3 is the CRS running time-frequency resource figure of LTE downlink transmission mode.
Fig. 4 is the CSI-RS running time-frequency resource figure of LTE downlink transmission mode, and wherein, Fig. 4 a is the CSI-RS running time-frequency resource figure that antenna port 15 is launched, and Fig. 4 b is the CSI-RS running time-frequency resource figure that antenna port 16 is launched.
Embodiment
For making the object, technical solutions and advantages of the present invention clearer, hereinafter in connection with accompanying drawing, embodiments of the invention are elaborated.It should be noted that, in the situation that not conflicting, the combination in any mutually of the feature in embodiment and embodiment in the application.
Embodiment 1
The present embodiment is introduced the measurement mechanism of Reference Signal Received Power (RSRP), as shown in Figure 1, comprise data sequence acquiring unit 101, gross power computing unit 102, data sequence N rank processing unit 103, noise power calculation unit 104 and RSRP computing unit 105, wherein:
This data sequence acquiring unit 101, is listed as for obtaining M the data sequence y that contains pilot frequency information m(k), wherein k is 1 to K minteger sequence number, K mfor data sequence y m(k) length; M is 1 to M integer sequence number, the number that M is data sequence;
This gross power computing unit 102, for the gross power Power_Total based on described data sequence computing reference signal and noise;
Described data sequence N rank processing unit 103, for described data sequence is carried out to the processing of N rank, described N is positive integer;
Described noise power calculation unit 104, for based on N rank data sequence calculating noise after treatment power P ower_Noise;
Described RSRP computing unit 105, for based on described gross power and noise power calculation RSRP value.
Preferably, in M column data sequence, same row y m(k) include the pilot frequency information of same transmitting antenna port.
An above-mentioned transmitting antenna port comprises the port of a transmit antennas composition, or the port of many transmit antennas composition.Preferably, above-mentioned all M column data sequences y m(k) length is identical, that is to say, for different m values, K mall identical.
In above-mentioned M column data sequence, same row y m(k) include the pilot frequency information of same transmitting antenna port, different y m(k) sequence can comprise the pilot frequency information of different transmitting antenna ports.Same row y m(k) include the pilot frequency information of same transmitting antenna port, specifically refer to: same row y m(k) process rear acquisition by the information sequence receiving in the pilot tone running time-frequency resource sequence at same transmitting antenna port.Different y m(k) sequence can comprise the pilot frequency information of different transmitting antenna ports, refers to: different y mm (k) sequence obtains after can being processed by the information sequence receiving in the pilot tone running time-frequency resource sequence of different transmitting antenna ports.Particularly, M is listed as the data sequence y that contains pilot frequency information m(k) can be by data sequence acquiring unit 101 to the information sequence receiving from the pilot tone running time-frequency resource sequence of same transmitting antenna port, process rear acquisition, i.e. all M column data sequences y m(k) include the pilot frequency information of same transmitting antenna port; Or, to the information sequence receiving from the pilot tone running time-frequency resource sequence of multiple transmitting antenna ports (two or more transmitting antenna ports), process rear acquisition by data sequence acquiring unit 101, i.e. all M column data sequences y m(k) include the pilot frequency information of multiple transmitting antenna ports.
Data sequence acquiring unit 101 obtains data sequence y m(k), time, can in same subframe, obtain this M and be listed as the data sequence y that contains pilot frequency information m(k); Or in multiple subframes (two or more subframes), obtain these M row and contain pilot frequency information data sequence y m(k).
This data sequence acquiring unit 101 can adopt following either type to obtain the data sequence y that 1 row contain pilot frequency information m(k):
Mode one: this data sequence acquiring unit 101, to the information sequence receiving in the pilot tone running time-frequency resource sequence in the same OFDM symbol different sub carrier of same transmitting antenna port, is processed rear acquisition one and is listed as y m(k).Preferably: on the same OFDM symbol of same transmitting antenna port, can receive the information sequence in the pilot tone running time-frequency resource sequence in different sub carrier according to the order from low frequency to high frequency, or, also can receive the information sequence in the pilot tone running time-frequency resource sequence in different sub carrier according to the order from high frequency to low frequency.
Now, the processing of information sequence is comprised: be used in the information sequence receiving in the pilot tone running time-frequency resource sequence of same transmitting antenna port and obtain a row y divided by the pilot frequency information sequence of launching in described pilot tone running time-frequency resource sequence m(k); Or, be used in the information sequence receiving in the pilot tone running time-frequency resource sequence of same transmitting antenna port be multiplied by the pilot frequency information sequence of launching in described pilot tone running time-frequency resource sequence conjugation obtain one row y m(k).
Mode two: this data sequence acquiring unit 101, to the information sequence receiving in the pilot tone running time-frequency resource sequence in the two adjacent OFDM symbol different sub carrier at same transmitting antenna port, is processed rear acquisition one and is listed as y m(k).
Now, the processing of information sequence is comprised:
Be used in the information sequence receiving in the pilot tone running time-frequency resource sequence of same transmitting antenna port and obtain a row y divided by the pilot frequency information sequence of launching in described pilot tone running time-frequency resource sequence m(k); Or
Be used in the conjugation acquisition one row y that the information sequence receiving in the pilot tone running time-frequency resource sequence of same transmitting antenna port is multiplied by the pilot frequency information sequence of launching in described pilot tone running time-frequency resource sequence m(k); Or
Be used in the information sequence receiving in the pilot tone running time-frequency resource sequence of same transmitting antenna port divided by the pilot frequency information sequence of launching in described pilot tone running time-frequency resource sequence after again demultiplexing obtain one row y m(k); Or
Be used in after the conjugation that the information sequence receiving in the pilot tone running time-frequency resource sequence of same transmitting antenna port is multiplied by the pilot frequency information sequence of launching in described pilot tone running time-frequency resource sequence demultiplexing again and obtain a row y m(k); Or
After being used in the information sequence demultiplexing receiving in the pilot tone running time-frequency resource sequence of same transmitting antenna port, obtain a row y divided by the pilot frequency information sequence of launching in described pilot tone running time-frequency resource sequence again m(k); Or
Be used in the conjugation that is multiplied by again the pilot frequency information sequence of launching in described pilot tone running time-frequency resource sequence after the information sequence demultiplexing receiving in the pilot tone running time-frequency resource sequence of same transmitting antenna port and obtain a row y m(k).
In a preferred embodiment, said apparatus also can comprise and reports unit 106, reports transmitting terminal for the RSRP value that RSRP computing unit 105 is calculated.
In a preferred embodiment, data sequence N rank processing unit 103 can be in the following ways to data sequences y m(k) carry out the every single order processing in the processing of N rank:
y m(k)′＝y m(k)-y m(k+1)
Wherein, y m(k) ' the data sequence for obtaining after the every single order processing in the processing of N rank, y m(k) data sequence obtaining after processing for upper single order, carrying out the first rank while processing, y m(k) data sequence of obtaining for described data sequence acquiring unit, k is 1 to K mthe integer sequence number of-n, K mthe data sequence y obtaining for described data sequence acquiring unit m(k) length, n represents current exponent number, is 1 to N positive integer.
In a preferred embodiment, noise power calculation unit 104 adopts following formula calculating noise power P ower_Noise according to N rank data sequence after treatment:
Power _ Noise = 1 M Σ m = 1 M Σ k = 1 K m - N y m ( k ) ′ × y * m ( k ) ′ L × ( K m - N )
Wherein, L = Σ k = 1 n + 1 ( C ( N , k - 1 ) × C ( N , k - 1 ) ) , C (x, y) is permutation and combination function, y m(k) ' the data sequence for obtaining after the processing of N rank, " * " represents conjugation.
In a preferred embodiment, the noise power that the gross power that RSRP computing unit 105 calculates based on gross power computing unit 102 and noise power calculation unit 104 calculate is calculated RSRP value:
RSRP＝Power_Total-Power_Noise。
In a preferred embodiment, RSRP computing unit 105, based on described gross power and noise power calculation RSRP value, comprising:
RSRP (n) value of calculating successively the 1st N rank, rank to the, wherein, n is 1 to N integer, selects last RSRP of monotonically increasing (n) to be worth as RSRP value; Or
Calculate successively RSRP (n) value on the 1st N rank, rank to the, wherein, n is 1 to N integer, in the time that " RSRP (n)-RSRP (n-1) " is less than predetermined threshold value, selects RSRP (n-1) or RSRP (n) as RSRP value.
A kind of specific implementation is: data sequence N rank processing unit 103 often carries out single order processing, noise power calculation unit 104 calculates a noise power Power_Noise according to data sequence after treatment, and RSRP computing unit 105 is based on gross power and the current RSRP value of current noise power calculation; Another kind of implementation is: data sequence N rank processing unit 103 carries out multistage calculating, calculate N data sequence after treatment, noise power calculation unit 104 calculates N noise power Power_Noise according to data sequence after treatment, and RSRP computing unit 105 goes out N RSRP value based on gross power and current noise power calculation.No matter adopt above-mentioned which kind of mode, finally obtain final RSRP value one of all can be in the following ways any: when the RSRP value calculating is for the last time less than last time RSRP value, select last time RSRP value as final RSRP value; Or the RSRP value that ought calculate for the last time and the last time difference of RSRP value are less than default thresholding, the RSRP value that selection calculates for the last time or last time RSRP value are as final RSRP value.
In a preferred embodiment, said apparatus also can comprise snr computation unit 107, for calculating signal to noise ratio snr according to RSRP value:
SNR＝RSRP/Power_Noise。
Embodiment 2
The present embodiment is introduced a kind of RSRP method of measurement, as shown in Figure 2, comprising:
Step 201, obtains M and is listed as the data sequence y that contains pilot frequency information m(k), wherein k is 1 to K minteger sequence number, K mfor data sequence y m(k) length; M is 1 to M integer sequence number, the number that M is data sequence;
Preferably, in M column data sequence, same row y m(k) include the pilot frequency information of same transmitting antenna port;
Same row y m(k) include the pilot frequency information of same transmitting antenna port, refer to: same row y m(k) process rear acquisition by the information sequence receiving in the pilot tone running time-frequency resource sequence at same transmitting antenna port.
Obtain M and be listed as the data sequence y that contains pilot frequency information m(k), comprising: in same subframe, obtain M and be listed as the data sequence y that contains pilot frequency information m(k); Or, in multiple subframes, obtain M row and contain pilot frequency information data sequence y m(k).
Be listed as the data sequence y that contains pilot frequency information obtaining M m(k), time, can be to obtain all M column data sequences y after information sequence to receiving from the pilot tone running time-frequency resource sequence of same transmitting antenna port is processed m(k); Also can be to obtain all M column data sequences y after information sequence to receiving from the pilot tone running time-frequency resource sequence of multiple transmitting antenna ports is processed m(k).
Obtain the data sequence y that 1 row contain pilot frequency information m(k) method and respective handling can, referring to embodiment 1 mode one and mode two, repeat no more herein.
Preferably, M column data sequences y m(k) length is identical.
Step 202, based on the gross power Power_Total of described data sequence computing reference signal and noise;
Step 203, carries out the processing of N rank to described data sequence, and described N is positive integer;
Particularly, can adopt following formula to data sequences y m(k) carry out the every single order processing in the processing of N rank:
y m(k)′＝y m(k)-y m(k+1)
Wherein, y m(k) ' the data sequence for obtaining after the every single order processing in the processing of N rank, y m(k) data sequence obtaining after processing for upper single order, carrying out the first rank while processing, y m(k) data sequence of obtaining for described data sequence acquiring unit, k is 1 to K mthe integer sequence number of-n, K mfor the data sequence y obtaining m(k) length, n represents current exponent number, is 1 to N positive integer.
Step 204, based on N rank data sequence calculating noise after treatment power P ower_Noise;
Particularly, can adopt following formula calculating noise power P ower_Noise according to N rank data sequence after treatment:
Power _ Noise = 1 M Σ m = 1 M Σ k = 1 K m - N y m ( k ) ′ × y * m ( k ) ′ L × ( K m - N )
Wherein, L = Σ k = 1 n + 1 ( C ( N , k - 1 ) × C ( N , k - 1 ) ) , C (x, y) is permutation and combination function, y m(k) ' the data sequence for obtaining after the processing of N rank, " * " represents conjugation.
Step 205, based on described gross power and noise power calculation RSRP value.
Adopt particularly following formula to calculate:
RSRP＝Power_Total-Power_Noise。
In the time calculating RSRP value, in order to obtain more accurate RSRP value, can adopt following methods to obtain RSRP:
RSRP (n) value of calculating successively the 1st N rank, rank to the, wherein, n is 1 to N integer, selects last RSRP of monotonically increasing (n) to be worth as RSRP value; Or, RSRP (n) value of calculating successively the 1st N rank, rank to the, wherein, n is 1 to N integer, in the time that " RSRP (n)-RSRP (n-1) " is less than predetermined threshold value, select RSRP (n-1) or RSRP (n) as RSRP value.
Specific implementation can, referring to describing in embodiment 1, repeat no more herein.
After above-mentioned steps 205, also can comprise step 206: the RSRP value of calculating is reported to transmitting terminal.In addition, after step 205, also can comprise step 207: calculate signal to noise ratio snr according to described RSRP value: SNR=RSRP/Power_Noise.Step 206 can realize respectively from 207 in different embodiment, also can in same embodiment, realize.While realization in same embodiment, execution sequence is not limit.
Below by application example, said method is specifically described.Receiving terminal hereinafter or measurement mechanism mainly refer to terminal, but also can be base station.Illustrate as an example of LTE downlink transmission mode example below, take receiving terminal as terminal as example describes.
Application example 1
Fig. 3 is the CRS running time-frequency resource figure of LTE downlink transmission mode, abscissa direction is time-domain direction, the length of each lattice has represented the length of an OFDM symbol, has only shown the length (subframe includes 14 OFDM symbols) of a subframe in figure; Ordinate direction is frequency domain direction, and the length of each lattice has represented the length of a subcarrier, has only shown the length (PRB includes 12 subcarriers) of a PRB in figure; Each grid represents a RE running time-frequency resource.
In Fig. 3, be marked with " R 0" running time-frequency resource be that port numbers is the position at the pilot frequency information place of the antenna transmission of " 0 ", this running time-frequency resource is referred to as pilot tone running time-frequency resource.Herein, pilot tone running time-frequency resource just refers to that transmitting has the running time-frequency resource of pilot frequency information.Pilot signal is also referred to as reference signal, and therefore pilot tone running time-frequency resource also can be called with reference to running time-frequency resource.The pilot tone running time-frequency resource showing in Fig. 3 is CRS pilot tone running time-frequency resource.
In Fig. 3, in time-domain direction, the pilot tone running time-frequency resource of antenna port 0 is in being numbered of the interior OFDM symbol of a subframe: 0, on 4,7,11; On frequency domain direction, it is the pilot tone running time-frequency resource that just has an antenna port 0 at interval of 6 subcarriers, it in Fig. 3, is the subcarrier that has only shown 1 PRB length, if the situation that is 10MHz for LTE system bandwidth, on frequency domain, just there are 50 PRB, namely there are 600 subcarriers, also include 100 pilot tone running time-frequency resources.
In Fig. 3, on OFDM symbol 0, receiving terminal can be along subcarrier order (i.e. order from low frequency to high frequency from the bottom up.Can certainly be along order from top to bottom, i.e. order from high frequency to low frequency), receive data sequence Y from pilot tone running time-frequency resource sequence 1(k), wherein k is 1 to K 1integer sequence number, K 1for data sequence Y 1length (k) (be also the number that receives the pilot tone running time-frequency resource of data on frequency domain, if the situation that is 10MHz for LTE system bandwidth, K 1<=100).Y 1(k) detailed expression formula is as follows:
Y 1(k)＝h 1(k)×R 1(k)+n 1(k) (1)
In above formula, h 1(k) represent the channel response coefficient on pilot tone running time-frequency resource sequence location, R 1(k) represent the pilot frequency information sequence of launching in pilot tone running time-frequency resource sequence, comprise the sequence of pilot frequency information, n 1(k) represent interference and the noise that the receiving terminal on pilot tone running time-frequency resource sequence location receives.Simple in order to describe, interference and noise are referred to as to noise herein.Therefore described noise herein, except referring to noise, also can comprise and disturb or do not comprise interference.
Initial data sequence is carried out to following processing:
To data sequence Y 1(k) divided by obtaining data sequence y after pilot frequency information sequence 1(k) as follows:
y 1(k)＝Y 1(k)/R 1(k)＝h 1(k)+n 1(k)/R 1(k) (2)
Generally, pilot frequency information data meet R 1(k) × R * 1(k)=1, " * " represents plural conjugation.Therefore to data sequence Y 1(k) be similar to data sequence Y divided by obtaining data sequence after pilot frequency information sequence 1(k) obtain data sequence after being multiplied by pilot frequency information sequence conjugation.
Therefore to the processing of initial data sequence can also be:
To data sequence Y 1(k) obtain data sequence y after being multiplied by pilot frequency information sequence conjugation 1(k) as follows:
y 1(k)＝Y 1(k)×R * 1(k)＝h 1(k)×R 1(k)×R * 1(k)+n 1(k)×R * 1(k) (3)
Therefore, data sequence y after treatment 1(k) include the pilot frequency information of same transmitting antenna port, i.e. R * 1or other forms (k).
In like manner, in Fig. 3, on OFDM symbol 4, receiving terminal can, along subcarrier order (also can be along order from top to bottom, i.e. order from high frequency to low frequency) from the bottom up, receive second data sequence Y from pilot tone running time-frequency resource sequence 2(k), wherein k is 1 to K 2integer sequence number, K 2for data sequence Y 2length (k) (be also the number that receives the pilot tone running time-frequency resource of data on frequency domain, if the situation that is 10MHz for LTE system bandwidth, K 2<=100), K 1with K 2can be unequal.Y 2(k) detailed expression formula is as follows:
Y 2(k)＝h 2(k)×R 2(k)+n 2(k) (4)
To data sequence Y 2(k) obtain data sequence y divided by pilot frequency information sequence or the conjugation that is multiplied by pilot frequency information sequence 2(k).
Therefore, data sequence y 2(k) include the pilot frequency information sequence R of same transmitting antenna port * 2(k).
In like manner, on the OFDM symbol 7 and 11 in Fig. 3, can obtain data sequence y 3and y (k) 4(k).
So just have 4 (M=4) column data sequences y m(k), wherein k is 1 to K minteger sequence number, K mfor data sequence y m(k) length, the K of different m mcan be unequal; M is 1 to M integer sequence number, the number that M is data sequence, M=4 in this example.M also can equal 1, represents only to obtain a column data sequence, also these 4 column data head and the tail can be coupled together and becomes a column data sequence.M also can be greater than 4, obtains M column data sequence in multiple subframes, is in a subframe, to obtain this 4 column data sequence in this example.
In this example, this M (M=4) column data sequences y m(k) be all that receiving terminal received information sequence in the pilot tone running time-frequency resource sequence of same transmitting antenna port obtains after certain processing.Certainly M column data sequences y, m(k) can be also that receiving terminal received information sequence in the pilot tone running time-frequency resource sequence of multiple transmitting antenna ports obtains after certain processing.Therefore, this M (M=4) column data sequences y m(k) can include the pilot frequency information of same transmitting antenna port, also can include the pilot frequency information of multiple transmitting antenna ports.
According to this M column data sequences y m(k), can calculate Reference Signal Received Power RSRP (being N=1 order algorithm).
In order to make the more accurate of RSRP calculating, can adopt the computational algorithm on N rank.Adopt N order algorithm computing reference signal received power to comprise following process:
Process 1: based on the gross power Power_Total of data sequence computing reference signal and noise;
Process 2: data sequence is carried out, after the processing of N rank, obtaining new data sequence y m(k).Wherein, N is positive integer;
Process 3: the data sequence calculating noise power P ower_Noise based on new;
Process 4: based on gross power and noise power, calculate RSRP value.That is: RSRP=Power_Total-Power_Noise.
In 4 processes, generally need to successively operate according to order above above.
Above in process 1, be the gross power of calculating reference signal and noise on a running time-frequency resource, therefore need in running time-frequency resource sequence, average.Preferred computing formula is:
Power _ Noise = 1 M &Sigma; m = 1 M &Sigma; k = 1 K m - N y m ( k ) &prime; &times; y * m ( k ) &prime; L &times; ( K m - N ) - - - ( 5 )
In process 2, data sequence is carried out, after the processing of N rank, obtaining new data sequence above, preferred processing method is:
for(n＝1：1：N)
for(k＝1：1：(K m-n))
y m(k)＝y m(k)-y m(k+1)；
end
end
Wherein, for () is circular flow function.
In process 3, be the noise power of calculating on a running time-frequency resource above, therefore need in running time-frequency resource sequence, average.Preferred computing formula is:
Power _ Noise = 1 M &Sigma; m = 1 M &Sigma; k = 1 K m - N y m ( k ) &prime; &times; y * m ( k ) &prime; L &times; ( K m - N ) - - - ( 6 )
Wherein, L = &Sigma; k = 1 n + 1 ( C ( N , k - 1 ) &times; C ( N , k - 1 ) ) , C (x, y) is the permutation and combination function in mathematics, supposes C (N, 0)=C (N, N)=1, the y in formula in mathematics m(k) data sequence for obtaining after the processing of N rank.
The benefit that adopts N order algorithm is that the RSRP calculating is more accurate, the larger RSRP of N is higher (supplementary notes: under the very high scene of SNR accurately, algorithm above can make the RSRP value of calculating less than normal than desirable RSRP value, therefore the larger RSRP of N is accurately higher also can be presented as N more computation RSRP value is out larger), shortcoming is the complexity that increases receiving terminal computing, and N is larger, and complexity is larger.Therefore further optimization method is: receiving terminal can be between merits and demerits Balancing selection.The method of Balancing selection can be carried out according to two kinds of modes are below one of any:
(1) receiving terminal calculate successively the 1st rank, the 2nd rank ..., RSRP (n) value on N rank, select last RSRP value of monotonic increase data as the RSRP value of calculating.That is to say, generally, N is larger, and RSRP value is larger.In computational process successively, in the time occurring that N becomes large RSRP value and diminishes on the contrary, just no longer down calculate, and abandoned this RSRP value, choose the RSRP value that a RSRP value conduct calculates.
For example, often carrying out after single order processing, calculate a noise power Power_Noise according to data sequence after treatment, based on gross power and the current RSRP value of current noise power calculation, when the RSRP value calculating is for the last time less than last time RSRP value, select last time RSRP value as final RSRP value;
(2) receiving terminal calculate successively the 1st rank, the 2nd rank ..., RSRP (n) value on N rank, in the time that " RSRP (n)-RSRP (n-1) " is less than a certain threshold value, select RSRP (n-1) as the RSRP value of calculating.Because N is larger, complexity is larger, if the RSRP therefore calculating along with the increase of N increases unconspicuous words, during balance is considered between merits and demerits, just no longer down calculate, directly selected RSRP (n-1) or RSRP (n) as the RSRP value of calculating.
For example, often carrying out after single order processing, calculate a noise power Power_Noise according to data sequence after treatment, based on gross power and the current RSRP value of current noise power calculation, when the RSRP value calculating for the last time and the difference of RSRP value are last time less than predetermined threshold value, the RSRP value that selection calculates for the last time or last time RSRP value are as final RSRP value.
N can preset, and maximum also can be set.
Receiving terminal can report transmitting terminal as required by calculating the RSRP obtaining.Report the mode can be according to the mode of periodic report, the mode that also can report according to triggering be carried out.
Receiving terminal can also, according to the RSRP calculating, calculate the signal to noise ratio of receiving terminal.Receiving terminal calculates signal to noise ratio formula:
SNR＝RSRP/Power_Noise (7)
According to the estimation procedure of the RSRP of this enforcement, can find out, this example does not need to obtain by complicated channel estimation process the channel response coefficient of concrete each pilot tone running time-frequency resource, but directly just can be calculated and estimate RSRP after above-mentioned algorithm process by the data sequence of obtaining.And, due to the noise sequence n comprising in data sequence m(k) be separate, adopt this exemplary algorithm channel response coefficient information strong correlation can be removed as much as possible as formula 6 algorithms, noise so just noise power can be estimated well, so after above-mentioned algorithm process, can well be suppressed.
Application example 2
Fig. 4 is the CSI-RS running time-frequency resource figure of LTE downlink transmission mode, abscissa direction is time-domain direction, the length of each lattice has represented the length of an OFDM symbol, has only shown the length (subframe includes 14 OFDM symbols) of a subframe in figure; Ordinate direction is frequency domain direction, and the length of each lattice has represented the length of a subcarrier, has only shown the length (PRB includes 12 subcarriers) of a PRB in figure; Each grid represents a RE running time-frequency resource.
In Fig. 4 a, be marked with " R 15" running time-frequency resource be that port numbers is the position at the pilot frequency information place of the antenna transmission of " 15 "; In Fig. 4 b, be marked with " R 16" running time-frequency resource be that port numbers is the position at the pilot frequency information place of the antenna transmission of " 16 ", these pilot tone running time-frequency resources that show in Fig. 4 are CSI-RS pilot tone running time-frequency resource.
In Fig. 4 a, in time-domain direction, the pilot tone running time-frequency resource of antenna port 15 is in being numbered of the interior OFDM symbol of a subframe: 5, on 6; On frequency domain direction, it is the pilot tone running time-frequency resource that just has an antenna port 15 at interval of 12 subcarriers, it in Fig. 4 a, is the subcarrier that has only shown 1 PRB length, if the situation that is 10MHz for LTE system bandwidth, on frequency domain, just there are 50 PRB, namely there are 600 subcarriers, also include 50 pilot tone running time-frequency resources.
In Fig. 4 b, in time-domain direction, the pilot tone running time-frequency resource of antenna port 16 is in being numbered of the interior OFDM symbol of a subframe: 5, on 6; On frequency domain direction, it is the pilot tone running time-frequency resource that just has an antenna port 16 at interval of 12 subcarriers, it in Fig. 4 b, is the subcarrier that has only shown 1 PRB length, if the situation that is 10MHz for LTE system bandwidth, on frequency domain, just there are 50 PRB, namely there are 600 subcarriers, also include 50 pilot tone running time-frequency resources.
As can be seen from Figure 4, the CSI-RS pilot tone running time-frequency resource of antenna port 15 and 16 is on identical running time-frequency resource position, and they are to adopt the mode of code division multiplexing to share identical running time-frequency resource.
In Fig. 4, on OFDM symbol 5, receiving terminal can, along subcarrier order (i.e. order from low frequency to high frequency) from the bottom up, receive data sequence Y from pilot tone running time-frequency resource sequence 1(k), wherein k is 1 to K 1integer sequence number, K 1for data sequence Y 1length (k) (be also the number that receives the pilot tone running time-frequency resource of data on frequency domain, if the situation that is 10MHz for LTE system bandwidth, K 1<=50).Y 1(k) detailed expression formula is as follows:
Y 1(k)＝h 11(k)×R 1(k)+h 12(k)×R 1(k)+n 1(k) (8)
In above formula, h 11(k) the channel response coefficient of the pilot frequency information sequence of expression antenna port 15 on running time-frequency resource sequence location, first R 1(k) represent the pilot frequency information sequence that antenna port 15 is launched in pilot tone running time-frequency resource sequence, h 12(k) the channel response coefficient of the pilot frequency information sequence of expression antenna port 16 on running time-frequency resource sequence location, second R 1(k) represent the pilot frequency information sequence that antenna port 16 is launched in pilot tone running time-frequency resource sequence, n 1(k) represent interference and the noise that the receiving terminal on pilot tone running time-frequency resource sequence location receives.
In this exemplary scene, on identical running time-frequency resource, the pilot frequency information that antenna port 15 and 16 sends is identical, therefore all uses R 1(k) represent.Use identical variable.If the pilot frequency information difference on different antennae port in other embodiments, need to adopt the Deplexing method different from this example (such as, may need first demultiplexing, and then divided by the operation of pilot frequency information sequence), obtaining after data sequence, still can adopt example 1 method to obtain RSRP value.
To initial data sequence Y 1(k) process:
To data sequence Y 1(k) divided by obtaining data sequence y after pilot frequency information sequence 1(k) as follows:
y 1(k)＝Y 1(k)/R 1(k)＝h 11(k)+h 12(k)+n 1(k)/R 1(k) (9)
Generally, pilot frequency information data meet R 1(k) × R * 1(k)=1, " * " represents plural conjugation.Therefore to data sequence Y 1(k) be similar to data sequence Y divided by obtaining data sequence after pilot frequency information sequence 1(k) obtain data sequence after being multiplied by the conjugation of pilot frequency information sequence.
Therefore to the processing of initial data sequence can also be:
To data sequence Y 1(k) obtain data sequence y after being multiplied by the conjugation of pilot frequency information sequence 1(k) as follows:
y 1(k)＝Y 1(k)×R * 1(k)＝h 11(k)×R 1(k)×R * 1(k)+h 12(k)×R 1(k)×R * 1(k)+n 1(k)×R * 1(k) (10)
In like manner, in Fig. 4, on OFDM symbol 6, receiving terminal also must, along subcarrier order (because needing sequence alignment solution code division multiplexing) from the bottom up, receive second data sequence Y from pilot tone running time-frequency resource sequence 2(k), wherein k is 1 to K 2integer sequence number, K 2for data sequence Y 2length (k) (be also the number that receives the pilot tone running time-frequency resource of data on frequency domain, if the situation that is 10MHz for LTE system bandwidth, K 2<=50), K at this moment 1with K 2must equate (because needing sequence alignment solution code division multiplexing).Y 2(k) detailed expression formula is as follows:
Y 2(k)＝h 21(k)×R 2(k)-h 22(k)×R 2(k)+n 2(k) (11)
To data sequence Y 2(k) obtain data sequence y divided by pilot frequency information sequence or after being multiplied by pilot frequency information sequence conjugation 2(k).
y 2(k)＝Y 2(k)/R 2(k)＝h 21(k)-h 22(k)+n 2(k)/R 2(k) (12)
Because the CSI-RS pilot tone running time-frequency resource on OFDM symbol 5 and 6 is adjacent, what can be similar to thinks channel response coefficient h 21(k)=h 11(k), h 22(k)=h 12(k).Therefore, above formula (12) can be transformed to:
y 2(k)＝Y 2(k)/R 2(k)＝h 11(k)-h 12(k)+n 2(k)/R 2(k) (13)
Obtaining after formula (9) and formula (13), both phase adductions are divided by the new sequences y of 2 rear acquisition 1(k):
y 1(k)’＝(y 1(k)+y 2(k))/2＝h 11(k)+n 1(k)/2R 1(k)+n 2(k)/2R 2(k) (14)
Obtaining after formula (9) and formula (13), both subtract each other and divided by the new sequences y of 2 rear acquisition 2(k):
y 2(k)’＝(y 1(k)-y 2(k))/2＝h 12(k)+n 1(k)/2R 1(k)-n 2(k)/2R 2(k) (15)
The operation of these " both phase adductions are divided by 2 " and " both subtract each other and divided by 2 " is above exactly to separate code division multiplexing operation.In this application example, due to CSI-RS data transmission mode, so be by " solution code division multiplexing " operation be placed on " divided by pilot frequency information sequence " operation after.Certain example application for other, according to the feature of pilot data transmission (such as the pilot frequency information sequence of two antenna ports is unequal), also can be first to initial data sequence demultiplexing, then carry out divided by pilot frequency information sequence or the processing of being multiplied by the conjugation of pilot frequency information sequence.In addition, in other example application, according to the feature of pilot data transmission (launching pilot frequency information such as two antenna ports do not adopt the mode of code division multiplexing), also can there is no the operation of demultiplexing, is directly divided by pilot frequency information sequence or the processing (processing of this method is just similar with example 1) of being multiplied by the conjugation of pilot frequency information sequence.
So just have 2 (M=2) column data sequences y m(k): y 1' and y (k) 2(k) ', wherein k is 1 to K minteger sequence number, K mfor data sequence y m(k) length; M is 1 to M integer sequence number, the number that M is data sequence, M=2 in this example.M also can equal 1, represents only to obtain a column data sequence.M also can be greater than 2, can in multiple subframes, obtain M column data sequence, is in a subframe, to obtain this 2 column data sequence in this example.Also can in a subframe, only obtain 1 column data sequence, in multiple subframes, obtain multi-column data sequence.
In this example, this M (M=2) column data sequences y m(k) be all that receiving terminal received information sequence in the pilot tone running time-frequency resource sequence of 2 transmitting antenna ports obtains after demultiplexing is processed.Certainly M column data sequences y, m(k) can be also that receiving terminal received information sequence in the pilot tone running time-frequency resource sequence of multiple transmitting antenna ports obtains after processing through demultiplexing respectively.
Method by this M column data sequence computing reference signal received power is identical with example 1 subsequently, here with regard to repeated description not.And can carry out the processing of N order algorithm to this M column data sequence and carry out computing reference signal received power, this is also identical with example 1, here repeated description not just.
One of ordinary skill in the art will appreciate that all or part of step in said method can carry out instruction related hardware by program and complete, described program can be stored in computer-readable recording medium, as read-only memory, disk or CD etc., described program can also be stored in terminal.Alternatively, all or part of step of above-described embodiment also can realize with one or more integrated circuits.Correspondingly, the each module/unit in above-described embodiment can adopt the form of hardware to realize, and also can adopt the form of software function module to realize.The present invention is not restricted to the combination of the hardware and software of any particular form.
Certainly; the present invention also can have other various embodiments; in the situation that not deviating from spirit of the present invention and essence thereof; those of ordinary skill in the art are when making according to the present invention various corresponding changes and distortion, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.

Claims (35)

1. Reference Signal Received Power (RSRP) measurement mechanism, comprises data sequence acquiring unit, gross power computing unit, data sequence N rank processing unit, noise power calculation unit and RSRP computing unit, wherein:
Described data sequence acquiring unit, is listed as for obtaining M the data sequence y that contains pilot frequency information m(k), wherein k is 1 to K minteger sequence number, K mfor data sequence y m(k) length; M is 1 to M integer sequence number, the number that M is data sequence;
Described gross power computing unit, for the gross power Power_Total based on described data sequence computing reference signal and noise;
Described data sequence N rank processing unit, for described data sequence is carried out to the processing of N rank, described N is positive integer;
Described noise power calculation unit, for based on N rank data sequence calculating noise after treatment power P ower_Noise;
Described RSRP computing unit, for based on described gross power and noise power calculation RSRP value.
2. device as claimed in claim 1, is characterized in that,
In described M column data sequence, same row y m(k) include the pilot frequency information of same transmitting antenna port.
3. device as claimed in claim 2, is characterized in that,
Same row y m(k) include the pilot frequency information of same transmitting antenna port, refer to:
Same row y m(k) process rear acquisition by the information sequence receiving in the pilot tone running time-frequency resource sequence at same transmitting antenna port.
4. device as claimed in claim 1, is characterized in that,
Described data sequence acquiring unit obtains M and is listed as the data sequence y that contains pilot frequency information m(k), comprising:
Described data sequence acquiring unit obtains described M and is listed as the data sequence y that contains pilot frequency information in same subframe m(k); Or
Described data sequence acquiring unit obtains described M row and contains pilot frequency information data sequence y in multiple subframes m(k).
5. device as claimed in claim 1, is characterized in that,
Described data sequence acquiring unit obtains M and is listed as the data sequence y that contains pilot frequency information m(k), comprising:
Described data sequence acquiring unit, to the information sequence receiving from the pilot tone running time-frequency resource sequence of same transmitting antenna port, is processed all M column datas of rear acquisition sequences y m(k); Or
Described data sequence acquiring unit, to the information sequence receiving from the pilot tone running time-frequency resource sequence of multiple transmitting antenna ports, is processed all M column datas of rear acquisition sequences y m(k).
6. the device as described in arbitrary claim in claim 1-5, is characterized in that,
Described data sequence acquiring unit obtains the data sequence y that 1 row contain pilot frequency information in the following ways m(k):
To the information sequence receiving in the pilot tone running time-frequency resource sequence in the same OFDM symbol different sub carrier of same transmitting antenna port, process rear acquisition one and be listed as y m(k).
7. device as claimed in claim 6, is characterized in that,
Received information sequence in pilot tone running time-frequency resource sequence in the same OFDM symbol different sub carrier of same transmitting antenna port, comprising:
On the same OFDM symbol of same transmitting antenna port, receive the information sequence in the pilot tone running time-frequency resource sequence in different sub carrier according to the order from low frequency to high frequency, or receive the information sequence in the pilot tone running time-frequency resource sequence in different sub carrier according to the order from high frequency to low frequency.
8. the device as described in arbitrary claim in claim 1-5, is characterized in that,
Described data sequence acquiring unit obtains the data sequence y that 1 row contain pilot frequency information in the following ways m(k):
To the information sequence receiving in the pilot tone running time-frequency resource sequence in the two adjacent OFDM symbol different sub carrier at same transmitting antenna port, process rear acquisition one and be listed as y m(k).
9. device as claimed in claim 6, is characterized in that,
Described processing comprises:
Be used in the information sequence receiving in the pilot tone running time-frequency resource sequence of same transmitting antenna port and obtain a row y divided by the pilot frequency information sequence of launching in described pilot tone running time-frequency resource sequence m(k); Or
Be used in the conjugation acquisition one row y that the information sequence receiving in the pilot tone running time-frequency resource sequence of same transmitting antenna port is multiplied by the pilot frequency information sequence of launching in described pilot tone running time-frequency resource sequence m(k).
10. device as claimed in claim 8, is characterized in that,
Described processing comprises:
Be used in the information sequence receiving in the pilot tone running time-frequency resource sequence of same transmitting antenna port and obtain a row y divided by the pilot frequency information sequence of launching in described pilot tone running time-frequency resource sequence m(k); Or
Be used in the conjugation acquisition one row y that the information sequence receiving in the pilot tone running time-frequency resource sequence of same transmitting antenna port is multiplied by the pilot frequency information sequence of launching in described pilot tone running time-frequency resource sequence m(k); Or
Be used in the information sequence receiving in the pilot tone running time-frequency resource sequence of same transmitting antenna port divided by the pilot frequency information sequence of launching in described pilot tone running time-frequency resource sequence after again demultiplexing obtain one row y m(k); Or
Be used in after the conjugation that the information sequence receiving in the pilot tone running time-frequency resource sequence of same transmitting antenna port is multiplied by the pilot frequency information sequence of launching in described pilot tone running time-frequency resource sequence demultiplexing again and obtain a row y m(k); Or
After being used in the information sequence demultiplexing receiving in the pilot tone running time-frequency resource sequence of same transmitting antenna port, obtain a row y divided by the pilot frequency information sequence of launching in described pilot tone running time-frequency resource sequence again m(k); Or
Be used in the conjugation that is multiplied by again the pilot frequency information sequence of launching in described pilot tone running time-frequency resource sequence after the information sequence demultiplexing receiving in the pilot tone running time-frequency resource sequence of same transmitting antenna port and obtain a row y m(k).
11. devices as described in arbitrary claim in claim 1-5, is characterized in that,
All M column data sequences y m(k) length is identical.
12. devices as described in arbitrary claim in claim 1-5, is characterized in that,
Described device also comprises and reports unit, reports transmitting terminal for the RSRP value that described RSRP computing unit is calculated.
13. devices as described in arbitrary claim in claim 1-5, is characterized in that,
Described data sequence N rank processing unit carries out the processing of N rank to described data sequence, comprising:
Adopt following formula to described data sequence y m(k) carry out the every single order processing in the processing of N rank:
y m(k)′＝y m(k)-y m(k+1)
Wherein, y m(k) ' the data sequence for obtaining after the every single order processing in the processing of N rank, y m(k) data sequence obtaining after processing for upper single order, carrying out the first rank while processing, y m(k) data sequence of obtaining for described data sequence acquiring unit, k is 1 to K mthe integer sequence number of-n, K mthe data sequence y obtaining for described data sequence acquiring unit m(k) length, n represents current exponent number, is 1 to N positive integer.
14. devices as claimed in claim 13, is characterized in that,
Described noise power calculation unit, based on N rank data sequence calculating noise after treatment power P ower_Noise, comprising:
Described noise power calculation unit adopts following formula calculating noise power P ower_Noise according to described N rank data sequence after treatment:
Power _ Noise = 1 M &Sigma; m = 1 M &Sigma; k = 1 K m - N y m ( k ) &prime; &times; y * m ( k ) &prime; L &times; ( K m - N )
Wherein, L = &Sigma; k = 1 n + 1 ( C ( N , k - 1 ) &times; C ( N , k - 1 ) ) , C (x, y) is permutation and combination function, y m(k) ' the data sequence for obtaining after the processing of N rank, " * " represents conjugation.
15. devices as claimed in claim 14, is characterized in that,
Described RSRP computing unit, based on described gross power and noise power calculation RSRP value, comprising:
RSRP＝Power_Total-Power_Noise。
16. devices as claimed in claim 15, is characterized in that,
Described RSRP computing unit, based on described gross power and noise power calculation RSRP value, comprising:
RSRP (n) value of calculating successively the 1st N rank, rank to the, wherein, n is 1 to N integer, selects last RSRP of monotonically increasing (n) to be worth as RSRP value; Or
Calculate successively RSRP (n) value on the 1st N rank, rank to the, wherein, n is 1 to N integer, in the time that " RSRP (n)-RSRP (n-1) " is less than predetermined threshold value, selects RSRP (n-1) or RSRP (n) as RSRP value.
17. devices as described in arbitrary claim in claim 1-5, is characterized in that,
Described device also comprises snr computation unit, for calculating signal to noise ratio snr according to described RSRP value:
SNR＝RSRP/Power_Noise。
18. 1 kinds of Reference Signal Received Power (RSRP) method of measurement, comprising:
Obtain M and be listed as the data sequence y that contains pilot frequency information m(k), wherein k is 1 to K minteger sequence number, K mfor data sequence y m(k) length; M is 1 to M integer sequence number, the number that M is data sequence;
Based on the gross power Power_Total of described data sequence computing reference signal and noise;
Described data sequence is carried out to the processing of N rank, and described N is positive integer;
Based on N rank data sequence calculating noise after treatment power P ower_Noise;
Based on described gross power and noise power calculation RSRP value.
19. methods as claimed in claim 18, is characterized in that,
In described M column data sequence, same row y m(k) include the pilot frequency information of same transmitting antenna port.
20. methods as claimed in claim 19, is characterized in that,
Same row y m(k) include the pilot frequency information of same transmitting antenna port, refer to:
Same row y m(k) process rear acquisition by the information sequence receiving in the pilot tone running time-frequency resource sequence at same transmitting antenna port.
21. methods as claimed in claim 18, is characterized in that,
The described M of obtaining is listed as the data sequence y that contains pilot frequency information m(k), comprising:
In same subframe, obtain described M and be listed as the data sequence y that contains pilot frequency information m(k); Or
In multiple subframes, obtain described M row and contain pilot frequency information data sequence y m(k).
22. methods as claimed in claim 18, is characterized in that,
The described M of obtaining is listed as the data sequence y that contains pilot frequency information m(k), comprising:
After being processed, the information sequence receiving from the pilot tone running time-frequency resource sequence of same transmitting antenna port obtains all M column data sequences y m(k); Or
After being processed, the information sequence receiving from the pilot tone running time-frequency resource sequence of multiple transmitting antenna ports obtains all M column data sequences y m(k).
23. methods as described in arbitrary claim in claim 18-22, is characterized in that,
Obtain in the following ways the data sequence y that 1 row contain pilot frequency information m(k):
To the information sequence receiving in the pilot tone running time-frequency resource sequence in the same OFDM symbol different sub carrier of same transmitting antenna port, process rear acquisition one and be listed as y m(k).
24. methods as claimed in claim 23, is characterized in that,
Received information sequence in pilot tone running time-frequency resource sequence in the same OFDM symbol different sub carrier of same transmitting antenna port, comprising:
On the same OFDM symbol of same transmitting antenna port, receive the information sequence in the pilot tone running time-frequency resource sequence in different sub carrier according to the order from low frequency to high frequency, or receive the information sequence in the pilot tone running time-frequency resource sequence in different sub carrier according to the order from high frequency to low frequency.
25. methods as described in arbitrary claim in claim 18-22, is characterized in that,
Obtain in the following ways the data sequence y that 1 row contain pilot frequency information m(k):
To the information sequence receiving in the pilot tone running time-frequency resource sequence in the two adjacent OFDM symbol different sub carrier at same transmitting antenna port, process rear acquisition one and be listed as y m(k).
26. methods as claimed in claim 23, is characterized in that,
Described processing comprises:
Be used in the information sequence receiving in the pilot tone running time-frequency resource sequence of same transmitting antenna port and obtain a row y divided by the pilot frequency information sequence of launching in described pilot tone running time-frequency resource sequence m(k); Or
Be used in the same row y of conjugation acquisition that the information sequence receiving in the pilot tone running time-frequency resource sequence of same transmitting antenna port is multiplied by the pilot frequency information sequence of launching in described pilot tone running time-frequency resource sequence m(k).
27. methods as claimed in claim 25, is characterized in that,
Described processing comprises:
Be used in the information sequence receiving in the pilot tone running time-frequency resource sequence of same transmitting antenna port and obtain a row y divided by the pilot frequency information sequence of launching in described pilot tone running time-frequency resource sequence m(k); Or
Be used in the same row y of conjugation acquisition that the information sequence receiving in the pilot tone running time-frequency resource sequence of same transmitting antenna port is multiplied by the pilot frequency information sequence of launching in described pilot tone running time-frequency resource sequence m(k); Or
Be used in the information sequence receiving in the pilot tone running time-frequency resource sequence of same transmitting antenna port divided by the pilot frequency information sequence of launching in described pilot tone running time-frequency resource sequence after again demultiplexing obtain one row y m(k); Or
Be used in after the conjugation that the information sequence receiving in the pilot tone running time-frequency resource sequence of same transmitting antenna port is multiplied by the pilot frequency information sequence of launching in described pilot tone running time-frequency resource sequence demultiplexing again and obtain a row y m(k); Or
After being used in the information sequence demultiplexing receiving in the pilot tone running time-frequency resource sequence of same transmitting antenna port, obtain a row y divided by the pilot frequency information sequence of launching in described pilot tone running time-frequency resource sequence again m(k); Or
Be used in the conjugation that is multiplied by again the pilot frequency information sequence of launching in described pilot tone running time-frequency resource sequence after the information sequence demultiplexing receiving in the pilot tone running time-frequency resource sequence of same transmitting antenna port and obtain a row y m(k).
28. methods as described in arbitrary claim in claim 18-22, is characterized in that,
All M column data sequences y m(k) length is identical.
29. methods as described in arbitrary claim in claim 18-22, is characterized in that,
Described method also comprises: the RSRP value of calculating is reported to transmitting terminal.
30. methods as described in arbitrary claim in claim 18-22, is characterized in that,
Described described data sequence is carried out to the processing of N rank, comprising:
Adopt following formula to described data sequence y m(k) carry out the every single order processing in the processing of N rank:
y m(k)′＝y m(k)-y m(k+1)
Wherein, y m(k) ' the data sequence for obtaining after the every single order processing in the processing of N rank, y m(k) data sequence obtaining after processing for upper single order, carrying out the first rank while processing, y m(k) data sequence of obtaining for described data sequence acquiring unit, k is 1 to K mthe integer sequence number of-n, K mfor the data sequence y obtaining m(k) length, n represents current exponent number, is 1 to N positive integer.
31. methods as claimed in claim 30, is characterized in that,
Described based on N rank data sequence calculating noise after treatment power P ower_Noise, comprising:
Adopt following formula calculating noise power P ower_Noise according to described N rank data sequence after treatment:
Power _ Noise = 1 M &Sigma; m = 1 M &Sigma; k = 1 K m - N y m ( k ) &prime; &times; y * m ( k ) &prime; L &times; ( K m - N )
Wherein, L = &Sigma; k = 1 n + 1 ( C ( N , k - 1 ) &times; C ( N , k - 1 ) ) , C (x, y) is permutation and combination function, y m(k) ' the data sequence for obtaining after the processing of N rank, " * " represents conjugation.
32. devices as claimed in claim 31, is characterized in that,
Described based on gross power and noise power calculation RSRP value, comprising:
RSRP＝Power_Total-Power_Noise。
33. methods as claimed in claim 32, is characterized in that,
Described based on gross power and noise power calculation RSRP value, comprising:
RSRP (n) value of calculating successively the 1st N rank, rank to the, wherein, n is 1 to N integer, selects last RSRP of monotonically increasing (n) to be worth as RSRP value; Or
Calculate successively RSRP (n) value on the 1st N rank, rank to the, wherein, n is 1 to N integer, in the time that " RSRP (n)-RSRP (n-1) " is less than predetermined threshold value, selects RSRP (n-1) or RSRP (n) as RSRP value.
34. methods as described in arbitrary claim in claim 18-22, is characterized in that,
Described method also comprises: calculate signal to noise ratio snr according to described RSRP value:
SNR＝RSRP/Power_Noise。
35. 1 kinds of terminals, is characterized in that, comprise Reference Signal Received Power (RSRP) measurement mechanism as described in any one in claim 1-17.
CN201210453380.5A 2012-11-13 2012-11-13 Reference signal received power measurement method, device and terminal Pending CN103813374A (en)

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Application publication date: 20140521