WO2003090372A1 - Dispositif et procede de mesure de rapport signal/brouillage - Google Patents
Dispositif et procede de mesure de rapport signal/brouillage Download PDFInfo
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- WO2003090372A1 WO2003090372A1 PCT/JP2003/005029 JP0305029W WO03090372A1 WO 2003090372 A1 WO2003090372 A1 WO 2003090372A1 JP 0305029 W JP0305029 W JP 0305029W WO 03090372 A1 WO03090372 A1 WO 03090372A1
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- midamble
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
- H04B1/7097—Interference-related aspects
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
- H04B1/7097—Interference-related aspects
- H04B1/711—Interference-related aspects the interference being multi-path interference
- H04B1/7113—Determination of path profile
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
- H04B1/7097—Interference-related aspects
- H04B1/711—Interference-related aspects the interference being multi-path interference
- H04B1/7115—Constructive combining of multi-path signals, i.e. RAKE receivers
- H04B1/7117—Selection, re-selection, allocation or re-allocation of paths to fingers, e.g. timing offset control of allocated fingers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
- H04B1/7097—Interference-related aspects
- H04B1/711—Interference-related aspects the interference being multi-path interference
- H04B1/7115—Constructive combining of multi-path signals, i.e. RAKE receivers
- H04B1/712—Weighting of fingers for combining, e.g. amplitude control or phase rotation using an inner loop
Definitions
- the present invention relates to an SIR measurement device and method. Background art
- TCP Transmit Power Control
- JD Joint Detection
- a matrix system matrix
- the conventional SIR measurement method measures SIR from the data part after JD demodulation.
- An object of the present invention is to provide an SIR measurement apparatus and method capable of measuring SIR after interference removal without receiving JD demodulation with high accuracy in a short time after reception.
- the gist of the present invention is to obtain a SIR after interference cancellation without performing JD demodulation by creating a delay profile using the midamble portion and measuring the SIR using this delay profile and the estimated path position. That is.
- the transmission power control (TPC) bit can be calculated immediately after the reception of the downlink slot, and the calculation of the TPC bit can be adjusted in time for the transmission of the next uplink time slot.
- the SIR measurement device includes: a creation unit that creates a delay profile using a known signal included in a received signal; and a selection unit that selects an existing path using the created delay profile.
- an SIR measurement method includes: a creating step of creating a delay profile using a known signal included in a received signal; and a selection step of selecting an existing path using the created delay port file. Step, RAKE combining step for RAKE combining the received signal, and S after interference cancellation using the created delay profile, selected path position, and received power after RAKE combining Measuring the IR.
- FIG. 1 is a block diagram showing a configuration of an SIR measurement device according to Embodiment 1 of the present invention
- FIG. 2 is a block diagram showing an example of the configuration of the SIR measurement unit in FIG. 1,
- FIG. 3 is a diagram showing an example of the time slot of the common midamble
- Fig. 4 is a diagram showing an example of the time slot of the deflecting amble
- Fig. 5 is a diagram of the time slot of the UE-specific midamble.
- FIG. 6 is a diagram showing an example
- FIG. 6 is a diagram showing an example of a delay profile of a common midamble
- FIG. 7 is a diagram showing an example of simulation conditions
- FIG. 8 is a diagram showing an example of basic SIR measurement characteristics as a result of SIR measurement simulation.
- FIG. 9 is a diagram for explaining interference between paths
- FIG. 10 is a diagram showing an example of SIR measurement characteristics after correction, which is the result of SIR measurement simulation
- FIG. 11 is a diagram to explain the effect of the roll-off filter
- Figure 12 is a diagram showing the impulse response waveform of the filter
- Figure 13 shows the ratio of the power in the same path to the total power (the power ratio in the same path range) for the number of chips in the range considered as the same path.
- FIG. 14 is a diagram showing an example of the SIR measurement characteristics after performing the correction of the roll-off filter, which is the result of the SIR measurement simulation,
- Figure 15 is a diagram showing an example of SIR measurement characteristics (dynamic characteristic case 1) due to differences in propagation path characteristics, which are the results of SIR measurement simulations.
- Figure 16 is a diagram showing an example of SIR measurement characteristics (dynamic characteristic case 2) due to differences in propagation path characteristics, which are the results of SIR measurement simulations.
- Figure 17 shows the difference in propagation path characteristics, which is the result of SIR measurement simulation.
- Fig. 18 shows an example of SIR measurement characteristics (dynamic characteristic case 3)
- Fig. 18 shows the propagation path characteristics of each case 1 to 3 in Figs. 15 to 17, and
- Fig. 19 shows the interference power measurement. Common honey when the range is expanded
- FIG. 20 is a diagram showing an example of SIR measurement characteristics due to a difference in delay profile length as a result of SIR measurement simulation.
- Figure 21 shows an example of the delay profile of the default (U E unit) mid ampoule when the interference power measurement range is expanded.
- Figure 22 shows an example of a specific delay profile in the method of calculating SIR for each mittamble and averaging it.
- FIG. 23 is a diagram showing an example of a specific delay profile in a method of calculating signal power and interference power for each midamble and averaging them
- FIG. 24 is a diagram according to Embodiment 2 of the present invention.
- FIG. 3 is a block diagram illustrating a configuration of an SIR measurement unit of the SIR measurement device. BEST MODE FOR CARRYING OUT THE INVENTION
- FIG. 1 is a block diagram showing a configuration of an SIR measurement device according to Embodiment 1 of the present invention.
- the SIR measuring apparatus 100 shown in FIG. 1 roughly includes an antenna 110, a radio receiving unit 120, a JD demodulating unit 130, and an SIR measuring unit 140.
- the JD demodulation section 130 is composed of a correlation processing section 131, a delay profile creation section 132, a path selection section 133, a RAKE synthesis section 134, and a JD calculation section 135.
- the radio signal received at 110 is subjected to predetermined reception processing such as down-conversion at radio reception section 120, and is converted into a baseband signal.
- the wireless receiving section 120 is provided with a receiving filter (not shown) (for example, a roll filter).
- the baseband signal obtained by radio receiving section 120 is output to JD demodulating section 130.
- JD demodulation section 130 performs JD demodulation of the received signal. Specifically, first, the correlation processing section 13 1 performs correlation processing using a known signal (here, the midamble part of the downlink time slot) included in the received signal, and then performs the correlation processing result. Then, a delay profile is created by the delay profile creation unit 132 by using the delay profile, and an actual path is selected (estimated) by the predetermined threshold processing by the path selection unit 133 using the delay profile. This path selection result is output to shakuhachi!: Synthesis unit 134 and JD calculation unit 135. RAKE combining section 134 performs RAKE combining of the received signal using the path selection result.
- a known signal here, the midamble part of the downlink time slot
- the JD calculation unit 135 performs the JD calculation using the RAKE combining result and the path selection result to obtain a demodulated signal from which interference has been removed.
- the demodulated signal after interference removal obtained by JD calculation section 135 is sent to a decoding section (not shown).
- the SIR measurement unit 140 measures the SIR after removing the interference using the delay profile, selected path position, and received power after RAKE combining obtained by the JD demodulation unit 130 without waiting for the end of JD demodulation processing. I do.
- the SIR measurement section 140 receives the delay profile from the delay profile creation section 132, the selected path position from the path selection section 133, and the received power after RAKE combining from the RAKE combining section 134.
- the SIR measuring section 140 receives code information from the JD calculating section 135. The code information is obtained in the middle of the JD operation.
- the measurement result of SIR measurement section 140 is sent to a transmission power control (TPC) bit calculation section (not shown).
- TPC transmission power control
- the SIR measurement unit 140 It has a power measurement section 144, a signal power correction section 144, an interference power correction section 148, and an SIR calculation section 150.
- the signal power measuring unit 1442 measures the signal power using the delay profile and the selected path position
- the interference power measuring unit 144 measures the interference power using the delay profile and the selected path position.
- the signal power compensator 146 and the interference power compensator 148 perform compensation to improve measurement accuracy. Therefore, for example, the code information is input to the signal power correction unit 146, and the autocorrelation value is input to the interference power correction unit 148.
- the SIR operation unit 150 calculates the ratio between the signal power and the interference power, and converts the ratio into the SIR of the data unit.
- the SIR is calculated by a predetermined arithmetic expression using the signal power, the interference power, the received power after RAKE combining, the allocation mode, and the spreading factor.
- the midamble allocation mode (Midamble Allocation Mode) (hereinafter, simply referred to as “allocation mode”) used in the TDSCDMA system will be described.
- the SIR measurement method (arithmetic formula) differs for each allocation mode, as described later in detail.
- TDSCDMA Time Division Multiple Access
- a common midamble There are three allocation modes in the TDSCDMA system: a common midamble, a default midamble, and a UE specific midamble.
- FIG. 3 is a diagram illustrating an example of a time slot of a common midamble.
- a common midamble as shown in Fig. 3, there is only one midamble in one time slot, and data of multiple users is multiplexed in the data section with one or more codes. At this time, the power of the multiplexed data part is equal to the power of the midamble part.
- FIG. 4 is a diagram showing an example of a default midamble time slot.
- the default midamble as shown in Fig. 4, multiple midambles exist in one timeslot, and multiple users enter multiple midambles.
- Data is multiplexed with one or more codes for each midamble, and the power of the data part is equal to the power of the midamble.
- FIG. 5 is a diagram showing an example of the time slot of the UE individual mid-ambition.
- the UE individual midamble as shown in Fig. 5, multiple midambles exist in one time slot, and multiple users use one midamble each.
- data is multiplexed with one or more codes for each midamble, and the power of the data part is equal to the power of the midamble.
- the interference component is suppressed to 1 / pg on average.
- pg is the midamble length (number of chips in the midamble portion) to be correlated, and is 128 in the case of T D -S C D MA.
- Senri in the own cell can be completely removed by JD.
- an interference cancellation ratio (for example, 0.8) may be introduced.
- SIR is measured using the midamble portion, but the present invention is not limited to this. It is also possible to use another pilot signal (known signal) instead of the midamble part.
- FIG. 6 is a diagram illustrating an example of the delay profile. This delay profile is created by the delay profile creation section 132 using the mittamble section.
- Pl, P2, and P3 can be regarded as signal components, and N1 to N6 can be regarded as interference components.
- N p is the number of paths
- W is the delay profile length
- DP (i) is the power of the i-th chip in the delay profile
- DP j is the power of the j-th chip in the delay profile
- P is the set of real paths.
- the signal power in the midamble needs to be the signal power per code and one symbol in the data.
- the time slot of the common midamble is, for example, as shown in Figure 3 above.
- the signal power in the midamble part is converted into the signal power per code in the data part.
- the data portion is multiplexed with a plurality of spreading codes, and the sum of the powers of the multiplexed signals is equal to the power of the midamble portion. Therefore, the received code power of the own user can be calculated from the power of the midamble using the ratio of the RAKE combination result of the used code created at the time of code determination in JD calculation section 135. That is, the signal power of the midamble part is PRAKE-. wn Z P RAK E t. tal times.
- P RAKE . wn Power after RAKE combining with a single spreading code P RAKE — t . tal is the total power of the power after RAKE combining by each spreading code for all spreading codes. If the user uses multiple spreading codes, the average value of the received code power of all codes used by the user is PRAKE . wn .
- the midamble part has a processing gain of pg, but the data part has only a processing gain of the spreading factor S F (Spreading Factor). Therefore, multiply SF / pg.
- Equation 2 It is represented by This is the basic formula for SIR measurement.
- the corrections include signal power correction (removal of the effects of interference between selected paths), interference power correction (removal of the effects of autocorrelation components), interference power correction (removal of the effects of the Rolloff filter), There is an expansion of the interference power measurement range (improvement measures for the propagation path of dynamic characteristics).
- signal power correction retractal of the effects of interference between selected paths
- interference power correction retractal of the effects of autocorrelation components
- interference power correction removal of the effects of the Rolloff filter
- There is an expansion of the interference power measurement range improvement measures for the propagation path of dynamic characteristics.
- FIG. 9 is a diagram for explaining interference between paths.
- the measured signal power of each path includes an interference component from another path.
- the power is
- the real power of path 2 and the real power of path 3 are respectively P2-(P3 X l / g + Pl X l / g)
- the measurement accuracy of the signal power is improved, and the measurement accuracy of the SIR can be improved.
- the measured interference power includes the power generated by autocorrelation. Therefore, in order to obtain the interference power after removing the intra-cell interference, the signal power component (preferably, the corrected signal power component) is calculated from the measured interference power. Need to be deducted.
- the signal power component is preferably, the corrected signal power component
- Path 1 component included in the interference signal power PIX1 / Pg
- Path 2 component included in the interference signal power P2 X 1 / pg
- Path 3 component included in the interference signal power P3 X l / pg
- the measurement accuracy of the interference power is improved, and the measurement accuracy of the SIR can be further increased.
- the effect of the signal power component on the interference signal power is not 1 / pg, but tends to depend on the midamble.
- the autocorrelation value is calculated from the basic midamble (Basic Midamble). I have.
- FIG. 11 is a diagram for explaining the effect of the roll-off filter.
- the effect of the roll-off filter is significant in the range of several chips near the selected path position (for example, Pl ', P2', P3 'in Fig. 11).
- a method is adopted in which the interference power near the path position is not included in the calculation of the interference power.
- Np ' is the number of paths within a range that can be regarded as the same path
- the general expression of SIR after the interference power correction is as follows:
- Fig. 12 is a diagram showing the waveform of the impulse response of the filter.
- Fig. 13 is the ratio of the power in the same path to the total power with respect to the number of chips in the range considered as the same path (power ratio in the same path range).
- FIG. 13 As shown in Fig. 13, as the range of the same path is increased, the effect of the filter is reduced as the range is increased.On the other hand, as the range of the same path is increased, the range for measuring the interference power becomes narrower. Fill with the smallest possible exclusion range It is necessary to remove the influence of data. Thus, for example, in the case of the example of FIG. 13, it is preferable that three chips be in the same path range.
- the measurement accuracy of the interference power can be further improved, and the measurement accuracy of the SIR can be further increased.
- FIG. 15, FIG. 16 and FIG. 17 show the results of the SIR measurement simulation using (Equation 5) when the propagation path has dynamic characteristics, respectively.
- Figure 15 shows an example of SIR measurement characteristics (dynamic characteristic case 1) due to differences in propagation path characteristics.
- Figure 16 shows an example of SIR measurement characteristics (dynamic characteristic case 2) due to differences in propagation path characteristics.
- FIG. 17 shows an example of SIR measurement characteristics (dynamic characteristic case 3) due to differences in propagation path characteristics.
- FIG. 18 is a diagram illustrating propagation path characteristics of each of Cases 1 to 3. Looking at this, in case 2 shown in Fig. 16, the measurement accuracy has deteriorated.
- the range for averaging the interference power (W- ⁇ ') is small, and the measurement accuracy of the interference power is considered to have deteriorated. Therefore, in order to increase the range of averaging the interference power, it is created by the midamble shift (Midamble SMft) used by the user. In addition to the delay profile used, the delay profile created by the midamble shift not used by the user is used.
- the allocation mode is the common midamble
- the correlation value of one midamble shift appears in the delay profile.
- the midamble shift within one slot is generated from one basic midamble. For this reason, when creating a delay profile, it is possible to create a delay profile for all of the mitomble shifts at once.
- FIG. 19 is a diagram illustrating an example of a delay profile of a common midamble.
- the midamble shift used is midamble (2)
- the correlation value appears only in the midamble (2) portion of the created delay profile.
- Unused midamble shifts show no signal power, only interference power. Therefore, the measurement range of the interference power is expanded by averaging the interference power of the delay profiles created by other midamble shifts.
- N Ka ll is Mitsu de amble shift number
- K all is Mitsu set of Doanburushifu bets
- N pk ' the path number in the range to be made the same path regarded in Mitsudoanburu k
- DP k (j) is Mitsudoanburu This is the power of the j-th chip in the delay profile of k.
- the interference power is measured by using the midamble shift delay profile not used by the user in addition to the midamble shift delay profile used by the user.
- the range is expanded, and even in the case of a propagation path with dynamic characteristics, the measurement accuracy of the interference power is improved, and the measurement accuracy of the SIR can be improved.
- FIG. 21 is a diagram illustrating an example of a delay profile of a default (U E individual) midamble.
- a plurality of midambles are used for one time slot, and interference power appears outside the selected path range in the delay profile created by each midamble. Therefore, the interference power can be measured outside the selected path range of the delay profile created by another midamble. As a result, the measurement range of the interference power is expanded, and the measurement accuracy of the interference power is improved (see (Equation 7) to (Equation 10) described later).
- the SIR calculation method can be roughly divided into the following two methods:
- the SIR can be calculated in the same way as for the common midamble using the path of the entire delay profile including other users.
- each method will be described in order. a) Calculating the SIR for each midamble and averaging it In this method, first calculate the SIR for each midamble as in the case of the common midamble. At this time, the path of the correction term of the interference power of the molecule includes the path of another midamble (signal component of another user).
- SIR k is the total number of midamble shifts in which the SIR ⁇ ⁇ of the midamble k is multiplexed
- K is the set of total midamble shifts in which the multiplex is multiplexed
- N pk is the number of paths in the midamble k
- N pk 'Is the number of paths in the range considered to be the same path in the midamble k
- N c .
- de and k are the number of spreading codes assigned to the midamble k
- W is the delay profile length
- DP k (i) is the power of the i-th chip in the midamble k delay profile
- P is the set of real paths
- SF is the set of real paths.
- Equation 8 calculates the SIR of the default midamble.
- N KW n is the number of midamble shifts used by the user
- K. wn is a set of midamble shifts used by the user.
- Equation 7 and Equation 8) Force The general equation for SIR measurement by this method (the equation after the above various corrections similar to the case of common midamble) is obtained.
- FIG. 4 an example of a specific delay profile in the present method is shown in FIG.
- the SIR is calculated for each of the midamble (2) and midamble (4). At this time, if multiple codes are multiplexed in one midamble, it is necessary to divide by the number of codes to obtain the average signal power per code. After calculating each SIR k , take the average of them.
- the numerator signal component is the average of the signal power for each midamble code used by the user.
- the interference power of the denominator is obtained by subtracting the signal power correction for all users from the average of the interference power for each midamble code used by the user.
- N K. wn is the number of mixed amble shifts used by the user
- K. wn is a set of honey Doanburushifu bets own user is using
- N Ka ll the actual tool Doanpurushifu door number
- K all the actual tool Doanburushifu door of the current case
- N pk is, the number of paths of Mi Tsu Doanburu k , N pk , is the number of paths within the range considered as the same path in the midamble k, N c .
- FIG. 23 is a diagram illustrating an example of a specific delay profile in the present method.
- the signal power is the sum of the signal powers of the midamble (2) and the midamble (4).
- the interference power is the sum of the interference powers of all the midambles.
- the interference component between paths is calculated from the signal power of the mittamble (2), mittamble (4), mittamble (6), and mittamble (7), and is subtracted from the sum of the above interference powers. Make corrections. Then, the SIR is calculated by taking the ratio of the signal power and the interference power thus obtained.
- N p is the number of paths
- ⁇ ⁇ ' is the number of paths within the range considered as the same path
- de is the number of allocated spreading codes
- W is the delay profile length
- DP (i) is the power of the i-th chip in the delay profile
- DP j) is the power of the j-th chip in the delay profile
- SF is the spreading factor
- pg is the number of chips in the midamble
- N Ka is the number of midamble shifts
- K all is the set of midamble shifts.
- the SIR is measured from the delay profile, the selected path position, and the received power after RAKE combining, for example, it is necessary to measure the SIR without waiting for the end of the JD demodulation processing. That is, the SIR can be measured immediately after receiving the downlink timing slot, and the calculation of the transmission power control bit can be made in time for the next uplink time slot.
- the processing gain is large compared to the conventional SIR measurement method using the data part, and the SIR can be measured with high accuracy. Since the signal component and the interference component can be separated by the position of the selected path, the SIR after interference cancellation can be measured. In other words, it is possible to measure the SIR after interference cancellation in a short time after reception without JD demodulation with high accuracy.
- the arithmetic expressions (for example, the above (Equation 6) to (Equation 10)) corresponding to each of the allocation modes (common midamble, default midamble, UE individual midamble) are stored in advance.
- the arithmetic expressions for example, the above (Equation 6) to (Equation 10)
- the arithmetic expressions are stored in advance.
- select an arithmetic expression corresponding to the specified allocation mode and perform the SIR operation using the selected arithmetic expression.
- SIR can be measured with one device.
- FIG. 24 is a block diagram showing a configuration of an SIR measurement section of the SIR measurement device according to Embodiment 2 of the present invention.
- the SIR measurement device (and SIR measurement unit) has the same basic configuration as the SIR measurement device (and SIR measurement unit) corresponding to Embodiment 1 shown in FIGS. 1 and 2.
- the same components are denoted by the same reference numerals, and description thereof will be omitted.
- the SIR measurement unit 140a further includes an RSCP operation unit 210 and an ISCP operation unit 220.
- RSCP of P-CCPCH is a measurement item of 3GPP TDD
- time slot ISCP is also a measurement item of 3GPP TDD.
- the RSCP operation unit 210 measures RSCP from the measured signal power component of SIR. Specifically, the RSCP is calculated according to the allocation mode, that is, for the common midamble, the default mixed ampoule, and the UE-specific midamble, the following (Equation 11), (Equation 12), (Equation 13),
- the I SCP calculator 220 measures I SCP from the measured interference power component of the S I R. Specifically, ISCP is calculated according to the allocation mode, that is, for the common midamble, the default midamble, and the UE-specific midamble, the following (Equation 14) and (Equation 15), respectively. , (Equation 16),
- ISCP ⁇ ⁇ DP k (j) / ⁇ (WN Pk ') - ⁇ DP m (!).
- the measurement of R SCP and the I SCP can be performed simultaneously with the measurement of S I R from the delay profile and the selected path position.
- the measurement of RSCP and the measurement of ISCP are performed in parallel with the measurement of SIR, but the present invention is not limited to this.
- the SIR measurement device can be mounted on a mobile station device and / or a base station device.
- SIR after interference cancellation can be measured in a short time after reception with high accuracy without performing JD demodulation.
- the SIR measurement apparatus of the present invention includes: a creating unit that creates a delay profile using a known signal included in a received signal; a selecting unit that selects an actual path using the created delay profile; A configuration comprising: RAKE combining means for performing RAKE combining, and measuring means for measuring SIR after interference cancellation using the created delay profile, the position of the selected path, and the received power after RAKE combining is adopted.
- the SIR since the SIR is measured from the delay profile, the selected path position, and the received power after RAKE combining, for example, the SIR can be measured without waiting for the end of the JD demodulation processing.
- the SIR can be measured immediately after receiving the time slot, and the calculation of the transmission power control bit can be made in time for the next upstream time slot.
- the signal component and the interference component can be separated according to the position of the selected path, so that the SIR after interference removal can be measured. That is, without performing JD demodulation SIR after interference cancellation can be measured in a short time after reception.
- the delay profile is created using the midamble portion, so that the processing gain is higher than in the conventional SIR measurement method using the data portion.
- the SIR can be measured with high accuracy.
- the measuring means measures signal power using the created delay profile and the position of the selected path, and interferes with the signal power using the created delay profile and the position of the selected path.
- a configuration including: interference power measuring means for measuring power, and arithmetic means for calculating SIR by a predetermined arithmetic expression using measured signal power and interference power and received power after RAKE combining,
- SIR can be measured in a short time after reception.
- the measuring unit further includes a signal power correcting unit that corrects the measured signal power so as to remove an influence of interference between the selected paths.
- a signal power correcting unit that corrects the measured signal power so as to remove an influence of interference between the selected paths.
- the measuring means further includes first interference power correcting means for correcting the measured interference power so as to remove the influence of the autocorrelation component, and the calculating means replaces the measured interference power.
- the SIR calculation is performed using the interference power corrected by the first interference power correction means, and the effect of the self-correlation component (interference power includes the power generated by the auto-correlation of the signal component) To correct the interference power so as to remove The degree of measurement is improved, and the SIR measurement accuracy can be further increased.
- the measuring unit further includes a second interference power correcting unit that corrects the measured interference power so as to remove the influence of the reception filter, and the calculating unit replaces the measured interference power.
- the influence of the reception filter for example, a roll-off filter
- the interference power includes the signal power.
- the interference power is corrected so as to eliminate the interference power, so that the measurement accuracy of the interference power is further improved and the SIR measurement accuracy can be further improved.
- the creating means may include a midamble shift delay profile used by the user and a midamble shift not used by the user.
- the second measuring means uses the delay profile of the midamble shift used by the user and the delay profile of the midamble shift not used by the user to calculate the interference power.
- the interference power can be reduced by using the midamble shift delay profile not used by the user in addition to the midamble shift delay profile used by the user.
- the measurement extends the measurement range of the interference power, making it possible to measure the interference power even in the case of a propagation path with dynamic characteristics.
- the measurement accuracy of the improvement it is possible to improve the measurement accuracy of the S I.
- the arithmetic expression used in the arithmetic means adopts a configuration corresponding to each allocation mode
- the arithmetic expression is used in each allocation mode ( Allocation Mode), specifically, Common Midamble (Common Midamble), Default Midamble (Default Midamble), and UE Specific Midamble (UE Specific Midamble), so JD demodulation in each allocation mode Measurement with high accuracy in a short time after receiving the SIR after interference removal without performing be able to.
- the arithmetic means selects an arithmetic expression corresponding to each allocation mode and an arithmetic expression corresponding to a specified allocation mode.
- the arithmetic expression corresponding to each allocation mode is stored in advance, and the arithmetic operation corresponding to the specified allocation mode is performed.
- the SIR is calculated by the equation, that is, the SIR measurement method is switched for each allocation mode, so that even if the allocation mode is different, one device can measure the SIR.
- the measuring means further has an RSCP measuring means for measuring a received signal code power using the signal power measured by the signal power measuring means
- the measured signal power is For example, to measure the received signal code power (RSCP), use the measurement profile of 3GPPTDD P—CCPCH (Primary-Common Control Physical Channel) RSCP as the delay profile. From the path position, it can be performed simultaneously with the SIR measurement.
- RSCP received signal code power
- the measuring means further has an ISCP measuring means for measuring an interference signal code power using the interference power measured by the interference power measuring means, the measured interference power In order to measure the interference signal code power (ISCP: Interference Signal Code Power) (called the time slot ISCP in 3GPP TDD), for example, the measurement of the time slot ISCP which is the measurement item of 3GPP TDD From the delay profile and the selected path position, it can be performed simultaneously with the SIR measurement.
- ISCP Interference Signal Code Power
- the SIR measurement method of the present invention includes: a creating step of creating a delay profile using a known signal included in a received signal; a selecting step of selecting an actual path using the created delay profile; Synthesize A RAKE combining step, and a measuring step of measuring the SIR after interference cancellation using the created delay profile, the position of the selected path, and the received power after the RAKE combining.
- the SIR since the SIR is measured from the delay profile, the selected path position, and the received power after RAKE combining, for example, the SIR can be measured without waiting for JD demodulation processing.
- the SIR can be measured immediately after receiving the signal, and the calculation of the transmission power control bit can be made in time for the next higher time slot.
- the signal component and the interference component can be separated according to the position of the selected path, so that the SIR after the interference removal can be measured. That is, SIR after interference removal can be measured in a short time after reception without performing JD demodulation.
- the measurement method when the measurement method is switched for each allocation mode, the measurement method is switched for each allocation mode. Therefore, even when the allocation mode is different, SIR can be measured by one device.
- the SIR after interference cancellation is measured according to (Equation 2) above, the SIR after interference cancellation is received in a short time after receiving the SIR without JD demodulation. It can measure with high accuracy.
- the signal power is further corrected to remove the influence of interference between paths, and the corrected SIR for the signal power is calculated.
- the signal power is corrected so as to eliminate the influence of interference between the selected paths, so that the signal power measurement accuracy is improved and the SIR measurement accuracy is improved. Can be enhanced.
- the interference power is corrected to remove the effect of the autocorrelation component.
- the power measurement accuracy is improved, and the SIR measurement accuracy can be further improved.
- the interference power is further corrected to remove the influence of the reception filter, and the corrected SIR for the interference power is calculated by 5)
- the interference power is corrected so as to remove the influence of the reception filter (for example, roll-off filter), so the measurement accuracy of the interference power is further improved, and the SIR measurement is performed. Accuracy can be further increased.
- the interference power is further measured using the midamble shift used by the user and the midamble shift not used by the user.
- the SIR after the interference removal is measured by the above (Equation 6)
- the SIR used by the user in addition to the delay profile of the midamble shift used by the user is used. Since the interference power is measured using a delay profile with no midamble shift, the measurement range of the interference power is expanded, and even in the case of a propagation path with dynamic characteristics, the measurement accuracy of the interference power is improved, and the SIR measurement accuracy is improved. Can be improved.
- the SIR is calculated for each midamble and the obtained calculation results are averaged to obtain the interference removal by the above (Equation 7) and (Equation 8). If the SIR after measurement is measured, the SIR after interference cancellation can be measured with high accuracy in a short time after reception without performing JD demodulation.
- the allocation mode is the default mixed ambience
- the signal power and the interference power are calculated for each midamble, and the calculated results are averaged to obtain the SIR after interference removal according to the above (Equation 9).
- the SIR after interference cancellation can be measured with high accuracy in a short time after reception without performing JD demodulation.
- the SIR after interference cancellation is measured by the above (Equation 10) when the allocation mode is the UE-specific midamble, the SIR after interference cancellation is received without performing JD demodulation. Measurement can be performed with high accuracy in a short time afterwards.
- the present invention can be applied to a mobile station device, a base station device, and the like in a mobile communication system.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mobile Radio Communication Systems (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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KR20047003994A KR100633901B1 (ko) | 2002-04-19 | 2003-04-21 | Sir 측정 장치 및 방법 |
AU2003235296A AU2003235296A1 (en) | 2002-04-19 | 2003-04-21 | Sir measurement device and method |
EP20030719148 EP1499032A1 (en) | 2002-04-19 | 2003-04-21 | Sir measurement device and method |
US10/488,888 US20040247059A1 (en) | 2002-04-19 | 2003-04-21 | Apparatus and method for sir measurement |
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JP2002117081A JP3588087B2 (ja) | 2002-04-19 | 2002-04-19 | Sir測定装置および方法 |
JP2002-117081 | 2002-04-19 |
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WO2003090372A1 true WO2003090372A1 (fr) | 2003-10-30 |
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PCT/JP2003/005029 WO2003090372A1 (fr) | 2002-04-19 | 2003-04-21 | Dispositif et procede de mesure de rapport signal/brouillage |
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US (1) | US20040247059A1 (ja) |
EP (1) | EP1499032A1 (ja) |
JP (1) | JP3588087B2 (ja) |
KR (1) | KR100633901B1 (ja) |
CN (1) | CN100444530C (ja) |
AU (1) | AU2003235296A1 (ja) |
WO (1) | WO2003090372A1 (ja) |
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JP3581356B2 (ja) * | 2002-05-22 | 2004-10-27 | 松下電器産業株式会社 | 通信端末装置及び拡散コード推定方法 |
EP1424786A4 (en) * | 2002-05-23 | 2005-06-08 | Matsushita Electric Ind Co Ltd | RECEPTION DEVICE AND RECEIVING METHOD |
US20050254559A1 (en) * | 2004-05-11 | 2005-11-17 | Wen-Sheng Hou | Packet detection |
US7711033B2 (en) | 2005-04-14 | 2010-05-04 | Telefonaktiebolaget Lm Ericsson (Publ) | SIR prediction method and apparatus |
US7903723B2 (en) * | 2005-04-18 | 2011-03-08 | Telefonaktiebolaget L M Ericsson (Publ) | Selecting delay values for a rake receiver |
DE602005004122T2 (de) * | 2005-04-18 | 2008-12-11 | Telefonaktiebolaget Lm Ericsson (Publ) | Auswahl der verzögerungswerte für einen Rake Empfänger |
CN100596032C (zh) * | 2005-05-13 | 2010-03-24 | 上海原动力通信科技有限公司 | 多个基本中间码的分配方法 |
JP2008053906A (ja) * | 2006-08-23 | 2008-03-06 | Fujitsu Ltd | 通信装置及びそのsir推定方法 |
WO2008041893A1 (en) * | 2006-10-05 | 2008-04-10 | Telefonaktiebolaget Lm Ericsson (Publ) | Method for predicting channel quality indicator (cq i) values. |
CN1949683B (zh) * | 2006-11-03 | 2011-11-16 | 上海宣普实业有限公司 | 基于串行干扰抵消消除同频小区信号干扰的方法和装置 |
CN1949682B (zh) * | 2006-11-03 | 2011-09-07 | 上海宣普实业有限公司 | 基于串行干扰抵消消除同频小区信号干扰的方法和装置 |
US8102795B2 (en) * | 2007-03-09 | 2012-01-24 | Qualcomm Incorporated | Channel equalization with non-common midamble allocation in 3GPP TD-CDMA systems |
US20100238818A1 (en) * | 2007-10-11 | 2010-09-23 | Panasonic Corporation | Wireless communication mobile station apparatus and communication quality information generating method |
WO2010030211A1 (en) * | 2008-09-11 | 2010-03-18 | Telefonaktiebolaget L M Ericsson (Publ) | Signal quality estimation |
US8175630B2 (en) * | 2009-07-10 | 2012-05-08 | Telefonaktiebolaget L M Ericsson (Publ) | Method of closed loop power control adjusted by self-interference |
TW201238260A (en) * | 2011-01-05 | 2012-09-16 | Nec Casio Mobile Comm Ltd | Receiver, reception method, and computer program |
EP3203642B1 (en) * | 2011-04-05 | 2019-02-20 | BlackBerry Limited | Method of interference cancellation and method of detection of erroneous neighbour cell measurements |
WO2013025134A1 (en) * | 2011-08-17 | 2013-02-21 | Telefonaktiebolaget L M Ericsson (Publ) | A receiver unit and method for suppressing interference in a multipath radio signal |
US9078179B2 (en) * | 2012-11-16 | 2015-07-07 | Qualcomm Incorporated | IRAT measurement reporting method in TD-SCDMA |
AU2014223600A1 (en) * | 2013-02-26 | 2015-08-06 | Schweitzer Engineering Laboratories, Inc. | State trajectory prediction in an electric power delivery system |
US10333312B2 (en) | 2013-06-26 | 2019-06-25 | Schweitzer Engineering Laboratories, Inc. | Distributed control in electric power delivery systems |
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- 2003-04-21 EP EP20030719148 patent/EP1499032A1/en not_active Withdrawn
- 2003-04-21 CN CNB03801324XA patent/CN100444530C/zh not_active Expired - Fee Related
- 2003-04-21 WO PCT/JP2003/005029 patent/WO2003090372A1/ja not_active Application Discontinuation
- 2003-04-21 US US10/488,888 patent/US20040247059A1/en not_active Abandoned
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JP2003318779A (ja) | 2003-11-07 |
KR20040037090A (ko) | 2004-05-04 |
KR100633901B1 (ko) | 2006-10-13 |
CN100444530C (zh) | 2008-12-17 |
JP3588087B2 (ja) | 2004-11-10 |
CN1572064A (zh) | 2005-01-26 |
AU2003235296A1 (en) | 2003-11-03 |
US20040247059A1 (en) | 2004-12-09 |
EP1499032A1 (en) | 2005-01-19 |
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