CN1303839C - Method and device for reducing sum of calculation for searching in zones and increasing accuracy of calculation - Google Patents
Method and device for reducing sum of calculation for searching in zones and increasing accuracy of calculation Download PDFInfo
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- CN1303839C CN1303839C CNB2003101218674A CN200310121867A CN1303839C CN 1303839 C CN1303839 C CN 1303839C CN B2003101218674 A CNB2003101218674 A CN B2003101218674A CN 200310121867 A CN200310121867 A CN 200310121867A CN 1303839 C CN1303839 C CN 1303839C
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Abstract
The present invention provides a method and a device for reducing sub-zone initial search operation quantity and enhancing operation precision. The method comprises the following steps: firstly, a data block in characteristic window length is read in all of received data; the transmitting power of data in the data block is respectively calculated; the power sum of multiple data at the left side and the right side of the data block and the middle data, the product of the transmitting power of the data at the left side and the right side of the data block and the middle power sum of the current characteristic window, and the product of the power sum of the middle data of the data block and the power sum of the data at both sides of the current characteristic window are respectively calculated; the two products are compared; the value of the current characteristic window is updated according to the comparison result until the whole frame is traversed and the last characteristic window is found.
Description
Technical field
The present invention relates to CDMA (code division multiple access) field of cellular communication systems, specifically, relate to the operand and the operational precision of cell initial search in the TD-SCDMA system.
Background technology
In the communication technology, the purpose of cell initial search be allow downlink receiver and base station with frequently, synchronously, and the original position of definite radio frames, the frame head that interweaves, SYNC sign indicating number, Basic Midamble sign indicating number, and then solve BCCH by joint-detection, finally select persistent district.
In the frame structure of TD-SCDMA, SYNC sign indicating number segment data is with full power transmissions, so on the angle of power spectrum, comparing the SYNC section with both sides GP (guard time in the structure of time slot of TD-SCDMA protocol definition between up-downgoing at interval) is " peak " value.The position of ratio minimum promptly is the position of DwPTS (downlink synchronization slot in the structure of time slot of TD-SCDMA protocol definition), judges the approximate location of SYNC thus.
For terminal use's receiver, the function of cell initial search generally realizes in physical layer, and physical layer generally uses the mode of fixed DSP (digital signal processor) or fixed DSP+ASIC (application-specific integrated circuit (ASIC)) to realize.The unit interval operational capability of fixed DSP and memory space (comprising the program space and data space) are most important two restraining factors that influence the realization of physical layer.
Under the very high situation of signal to noise ratio, the power of GP and be very little, and have signal the place power and be bigger, therefore when removing with a bigger value with this smaller value, it is littler that this value can become again.When realizing with fixed point, if to such an extent as to the too little significance bit of this value may will obtain several approaching substantially values so outside the precision of expection, this will cause can not find DwPTS accurately.
Summary of the invention
One of purpose of the present invention is for providing a kind of method that reduces the cell initial search operand and improve operational precision.It is to search down-bound pilot frequency signal by the feature window, and the length of characteristic window is a predetermined length, may further comprise the steps:
From random time, receive sufficiently long data;
According to current location information and described predetermined length that the feature window is searched, the data block of a predetermined length is read in corresponding position from all reception data;
Calculate the transmitting power of each data in the described data block respectively;
Calculate respectively a plurality of data of the right and left in the described data block and intermediate data power and, the length of the right and left data and intermediate data is a length of setting in advance;
Calculate respectively described data block the right and left data transmitting power and with the middle power of current feature window and product and the power of described data block intermediate data and with the both sides data power of current feature window and product;
With the transmitting power of described data block both sides data and with the middle power of current feature window and product and the power of described data block intermediate data and with described current feature window in data block the right and left data power and product compare, according to comparative result, determine whether to upgrade in the current feature window the right and left data power and and current feature window in intermediate data power and, if the transmitting power of described data block both sides data and with the middle power of current feature window and product less than the power of described data block intermediate data and with the both sides data power of current feature window and product, with the both sides data power of current feature window and be updated to described data block both sides data power and, the intermediate data power of current feature window and be updated to described data block intermediate data power and, the position of current feature window is updated to the current location that described feature window is searched, otherwise, with the both sides data power of current feature window and and intermediate data power and and the position remain unchanged;
Current location information according to the search of feature window, judge whether continue to search the feature window, if the current location of feature window search is not the position of last reception data, just the current location with the search of feature window increases by a predefined step-length, the current location of searching then according to the feature window, above-mentioned computing circulates, continue to search the feature window, if the current location of feature window search is the position of last reception data, finish to search the computing of feature window, at this moment, current feature window position promptly is the feature window of being sought.
Another object of the present invention is for providing a kind of device that reduces the cell initial search operand and improve operational precision.It is to adopt the method for searching down-bound pilot frequency signal by the feature window, the length of characteristic window is a predetermined length, comprise: a memory cell, the current location memory cell that one feature window is searched, one power calculation unit, an adder unit, a multiplication unit, one comparing unit, a current feature window memory cell and a cycling element;
Described memory cell is used to store all and receives data-signals, and the current location memory cell of itself and described power calculation unit, the search of described feature window links;
The current location memory cell that described feature window is searched is used to store and carries out the current location that the feature window is searched, and itself and described cycling element, described memory cell, described power calculation unit link; Described current feature window memory cell, be used to store possible feature window both sides data transmitting power and, the intermediate data signal transmission power and and positional information, it links with described multiplication unit and comparing unit respectively;
Described power calculation unit, be used for the positional information of being stored in the current location memory cell according to the search of feature window, read the data block that a length is predetermined length from the memory cell corresponding position, and calculate the transmitting power of each data-signal in this data block, itself and the current location of feature window search, described adder unit, described memory cell link;
Described adder unit is used for the transmitting power sum and the intermediate data signal transmission power sum of both sides data in the calculated data piece, and itself and described multiplication unit, described power calculation unit link; Described multiplication unit, the transmitting power sum and the intermediate data signal transmission power sum of both sides data in the described data block of the transmitting power sum of the both sides data in the current feature window of being stored according to current feature window memory cell and intermediate data signal transmission power sum and the output of described adder unit, the transmitting power sum of the calculated data piece both sides data power sum that multiply by the middle power sum of current feature window and data block intermediate data multiply by the both sides data power sum of current feature window respectively, itself and described adder unit, described comparing unit, described current feature window memory cell links;
Described comparing unit, be used for the both sides data power sum that power sum that transmitting power sum with the data block both sides data of described multiplication unit output multiply by the middle power sum of current feature window and data block intermediate data multiply by current feature window and compare, it links with described multiplication unit, described cycling element and current feature window memory cell respectively;
Described cycling element, the current location that the feature window of being stored according to the current location memory cell of feature window search is searched judges whether continue to search the feature window, itself and the current location memory cell of feature window search, described comparing unit link.
Beneficial effect of the present invention is: 1, by using the method that substitutes divider with multiplication unit, with asking the operand of power ratio to reduce greatly, reduce the operand of this fixed DSP widely.2. under the very high situation of signal to noise ratio, the original value of noise part will be very little, the so original division arithmetic that adopts can allow this value become littler, even exceed the anticipate accuracy of fixed-point calculation, thereby have no idea to draw correct DwPTS position, and adopt multiplying just can thoroughly avoid this problem.3, this will make and realize that on fixed DSP cell initial search is more easy, and improve the performance of cell initial search.
Description of drawings
Fig. 1 is a TD-SCDMA frame structure schematic diagram.
Fig. 2 adopts the flow chart of chip moving characteristic window judgement SYNC position one by one for tradition.
Fig. 3 adopts the device schematic diagram of chip moving characteristic window judgement SYNC position one by one for tradition.
Fig. 4 is feature window schematic diagram according to an embodiment of the invention.
Fig. 5 is for judging the flow chart of SYNC position according to an embodiment of the invention.
Fig. 6 is for judging the device schematic diagram of SYNC position according to an embodiment of the invention.
Fig. 7 is for judging the device schematic diagram of SYNC position according to another embodiment of the present invention.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described as follows:
Be illustrated in figure 1 as TD-SCDMA frame structure schematic diagram; with the 5ms frame is example; comprise 400 symbol datas in one frame; described entire frame is 6400 chips (chip); promptly a symbol data is 16 chips; every frame is divided into 7 time slots; if cell initial search is a frame; be 6400 chips; its selected feature window is 128 chips, and the right and left respectively is 32 chips (2 symbol), and the centre is 64 chips (4 symbol); in this frame, contain down-bound pilot frequency signal; promptly will find the SYNC sign indicating number, SYNC sign indicating number section is 4 symbols (symbol) length usually, and there is the protection interval of 3 symbols on the left side; there is the protection interval of 6 symbols on the right; in this embodiment, with 2 symbols in both sides totally 4 symbols power with the power of 4 symbols of SYNC sign indicating number with compare, as shown in Figure 4; when with 2 symbol in both sides (totally 4) power and divided by SYNC section power and the time, the value that obtains should be very little.Because the SYNC sign indicating number is with full power transmissions, the power of described GP is very little, so on the angle of power spectrum, comparing the SYNC section with both sides GP is " peak value ", the power of these both sides GP is compared with the power of SYNC sign indicating number and be should be minimum, the present invention just is based on that this searches the SYNC sign indicating number is down-bound pilot frequency signal, the present invention is with the different of conventional method and device, be to replace the divider that uses in conventional method and the device in method provided by the invention and the device, finish the ratio of the power of the power of both sides GP and SYNC sign indicating number with multiplier.Referring to shown in Figure 5, the flow chart of the judgement SYNC position of one embodiment, the chip that travels through one by one in the entire frame is searched the feature window to determine the position of SYNC sign indicating number, if cell initial search is a frame, the data of all receptions i.e. 6400 chips of frame data, if cell initial search is 5 frames, all receive data is 5 * 6400 chips of data of 5 frames, the cell initial search of present embodiment is 1 frame, i.e. 6400 chips, promptly from any time, receive frame data, must contain a feature window in these frame data, promptly search the feature window to determine the SYNC position in all reception data starting positions since a frame, when the current location of feature window search soon is made as i=1, be that unit search entire frame with the data block consistent with feature window length this moment, i.e. 128 chips, at this moment, receive the corresponding position of current location information of searching with the feature window the data from all, it is the data block that 1 place, position reads 128 chip lengths, the i.e. data of the 1st to 128 chip, this data block is judged the computing of feature window: the transmitting power that calculates each data in this data block respectively, transmitting power summation with 32 chip data in the left side in this data block and 32 the chip data in the right, be labeled as A[j], transmitting power summation with middle 64 chip data in this data block, be designated as B[j], this moment is because i=1, with A[1], B[1], 1 value is as the initialization value of current feature window, three data of current feature window storage, promptly, the transmitting power and the A[k of 32 chip data in the left side of current feature window and 32 the chip data in the right], the transmitting power and the B[k of 64 the chip data in centre of current feature window], and the position k of current feature window, this moment is with A[k]=A[1], B[k]=B[1], k=1 is as the initialization value of current feature window, calculate respectively described data block both sides data transmitting power and with the middle power of current feature window memory cell and product C value, the transmitting power of described data block both sides data and with current feature window memory cell middle power and product D value, be C=A[j] * B[k], D=A[k] * B[j], C value and D value are compared; If C is less than D, then the value of j is composed to k, with A[j] compose and give A[k], B[j] compose and give B[k], otherwise, A[k], B[k], the k value remains unchanged, finish the judgement work of data block this moment, whether the current location of then judging the search of feature window is all end position that receive data, if the end position of the not all reception data of current location that the feature window is searched, just the current location that the feature window is searched increases by a predetermined step-length, i.e. arbitrary value in 1 to 16 chip, promptly, this step-length can be 1 chip, or be 2 chips ... 16 chips, in this embodiment, determine that predetermined step-length is 1 chip, the current location i=2 that this moment, the feature window was searched, current location according to the search of feature window, receive the corresponding position 2 of current location information of searching with the feature window in the data from all, read the data block of one 128 chips once more, the i.e. data of the 2nd to 129 chip, this data block is judged the computing of feature window: this data block is continued to obtain the transmitting power that calculates each data in this data block respectively, 32 chip data in the left side in this data block and the transmitting power of 32 the chip data in the right summation A[j], the transmitting power of 64 chip data summation B[j in the middle of in this data block], the transmitting power of described data block both sides data and with the middle power of current feature window memory cell and product C value, the transmitting power of described data block both sides data and with current feature window memory cell middle power and product D value, be C=A[j] * B[k], D=A[k] * B[j], C value and D value are compared; If C is less than D, then the value of j is composed to k, with A[j] compose and give A[k], B[j] compose and give B[k], otherwise, A[k], B[k], the k value remains unchanged, and finish the judgement work of this data block this moment, then judges the current location that the feature window is searched, by that analogy, the data block of feature window search is respectively 1-128 chip, 2-129 chip, 3-130 chip, 4-130 chip ... data block, respectively to the operation of these data block judge feature feature windows, be all ends that receive data up to the current location of feature window search, finish computing, K is exactly the feature window position that will seek, A[k] be exactly current feature window the both sides data transmitting power and, B[k] be exactly current feature window intermediate data transmitting power and, k is exactly the position of current feature window.
Referring to Fig. 6, judge the device schematic diagram of SYNC position according to an embodiment of the invention, it is the device that adopts above-mentioned reduction cell initial search operand and improve the method for operational precision.It comprises a memory cell, the current location memory cell that a feature window is searched, a power calculation unit, an adder unit, a multiplication unit, a comparing unit, a current feature window memory cell and a cycling element;
Described memory cell is used to store all and receives data-signals, and the current location memory cell of itself and described power calculation unit, the search of described feature window links;
The current location memory cell that described feature window is searched is used to store and carries out the current location that the feature window is searched, and itself and described cycling element, described memory cell, described power calculation unit link;
Described current feature window memory cell, be used to store possible feature window both sides data transmitting power and, the intermediate data signal transmission power and and positional information, it links with described multiplication unit and comparing unit respectively;
Described power calculation unit, be used for the positional information of being stored in the current location memory cell according to the search of feature window, read the data block that a length is predetermined length from the current location information corresponding position of memory cell and the search of feature window, and calculate the transmitting power of each data-signal in this data block, itself and the current location of feature window search, described adder unit, described memory cell link;
Described adder unit is used for the transmitting power sum and the intermediate data signal transmission power sum of both sides data in the calculated data piece, and itself and described multiplication unit, described power calculation unit link; Described multiplication unit, the transmitting power sum and the intermediate data signal transmission power sum of both sides data in the described data block of the transmitting power sum of the both sides data in the current feature window of being stored according to current feature window memory cell and intermediate data signal transmission power sum and the output of described adder unit, the transmitting power sum of the calculated data piece both sides data power sum that multiply by the middle power sum of current feature window and data block intermediate data multiply by the both sides data power sum of current feature window respectively, itself and described adder unit, described comparing unit, described current feature window memory cell links;
Described comparing unit, be used for the both sides data power sum that power sum that transmitting power sum with the data block both sides data of described multiplication unit output multiply by the middle power sum of current feature window and data block intermediate data multiply by current feature window and compare, it links with described multiplication unit, described cycling element and current feature window memory cell respectively;
Described cycling element, the current location that the feature window of being stored according to the current location memory cell of feature window search is searched judges whether continue to search the feature window, itself and the current location memory cell of feature window search, described comparing unit link.If the current location of the feature window search that the current location memory cell of feature window search is stored is not the end of memory cell, the current location that the feature window of just the current location memory cell of feature window search being stored is searched increases by a predetermined step-length, 1 chip, the current location information that the feature window of being stored according to the current location memory cell of feature window search is searched, power calculation unit again from memory cell with the current location of feature window search, read a predetermined length, the i.e. data block of 128 chips (chips) length, search the feature window, then, make the current location of the feature window search that the current location memory cell of feature window search stored increase by a predetermined step-length once more, behind 1 chip, search the feature window, by that analogy, the current location of the feature window search of being stored up to the current location memory cell of feature window search is the end of memory cell, finishes to search the operation of feature window this moment, and this moment, current feature window memory cell was the feature window of being sought.
Referring to shown in Figure 7, for judging the device schematic diagram of SYNC position according to another embodiment of the present invention.Comprise: a reading unit, a writing unit, a memory cell, the current location memory cell that a feature window is searched, a power calculation unit, an adder unit, a multiplication unit, a current feature window memory cell and a cycling element;
Described memory cell is used to store all and receives data-signals, and the current location memory cell of itself and described reading unit, the search of described feature window links;
Described reading unit, it is used for from the memory cell reading of data, its respectively with described memory cell, the current location memory cell and the power calculation unit of the search of described feature window link;
The current location memory cell that described feature window is searched is used to store and carries out the current location that the feature window is searched, and it links with described cycling element, described memory cell and described reading unit respectively;
Described current feature window memory cell, be used to store possible feature window both sides data transmitting power and and the intermediate data signal transmission power and, it links with described multiplication unit, writing unit respectively;
Described power calculation unit, be used for the positional information of being stored according in the current data block storage site element, read the data block that a length is predetermined length from memory cell and described data block location information corresponding position, and calculate the transmitting power of each data-signal in this data block, it links with described adder unit, reading unit respectively;
Described adder unit is used for the transmitting power sum and the intermediate data signal transmission power sum of both sides data in the calculated data piece, and itself and described multiplication unit, described power calculation unit link; Described multiplication unit, the transmitting power sum and the intermediate data signal transmission power sum of both sides data in the described data block of the transmitting power sum of the both sides data in the current feature window of being stored according to current feature window memory cell and intermediate data signal transmission power sum and the output of described adder unit, the transmitting power sum of the calculated data piece both sides data power sum that multiply by the middle power sum of current feature window and data block intermediate data multiply by the both sides data power sum of current feature window respectively, its respectively with described adder unit, described comparing unit, current feature window memory cell links;
Described comparing unit, be used for the both sides data power sum that power sum that transmitting power sum with data block both sides data multiply by the middle power sum of current feature window and data block intermediate data multiply by current feature window and compare, it links with described writing unit, described multiplication unit respectively:
One writing unit, it is used for writing data to described current feature window memory cell, and it links with described current feature window memory cell, described cycling element and described comparing unit respectively;
Described cycling element, current data block memory location of being stored according to the current data block storage site element and current location memory cell stored the current location of carrying out the search of feature window judge whether continue to search the feature window, the current location memory cell and the writing unit of itself and the search of feature window link.
Ask power ratio compared with divider by using with multiplication unit, its operand reduces greatly, come comparison with 16 bit DSP fixed point divisions, realize division if subtract with condition, this device can reduce the operand more than 30 times of asking power ratio so, if will do 5 frames considering the cell initial search first step, and every frame will repeat 6400 times, this device will reduce the operand of this fixed DSP widely, under the very high situation of signal to noise ratio, the original value of noise part will be very little, if the division arithmetic that adopts can allow this value become littler, even exceed the anticipate accuracy of fixed-point calculation, thus have no idea to draw correct DwPTS position, and adopt multiplying just can thoroughly avoid this problem.The operand of minimizing cell initial search in TD-SCDMA (comprising TSM) terminal use's receiver, and improve operational precision.This will make realizes that on fixed DSP cell initial search is more easy, and improves the performance of cell initial search.
According to reduction cell initial search operand provided by the present invention and the method and the device thereof that improve operational precision is with in the TD-SCDMA system, its terminal use's cell initial search is applied as example on fixed DSP, but the method also can be used in terminal use's receiver of other 3G (Third Generation) Moblie standards.It uses prerequisite is that these standards adopt feature window method to search DwPTS.Simultaneously, this method can be used for also realizing the cell initial search first step with the ASIC method that prerequisite is to adopt the implementation method of fixed point.
This embodiment only is used for illustrating the present invention, and is not to be used for limiting the present invention.
Claims (14)
1. method that reduces the cell initial search operand and improve operational precision, it is to search down-bound pilot frequency signal by the feature window, the length of characteristic window is a predetermined length, it is characterized in that, may further comprise the steps:
Steps A: from random time, receiving with the frame is the sufficiently long data of unit;
Step B: current location information and described predetermined length according to the feature window is searched receive the data block that reads a predetermined length the data with the corresponding position of current location information of described feature window search from all;
Step C: the transmitting power of calculating each data in the described data block respectively;
Step D: calculate respectively a plurality of data of the right and left in the described data block and intermediate data power and, the length of the right and left data and intermediate data is a length of setting in advance;
Step e: calculate respectively described data block the right and left data transmitting power and with the middle power of current feature window and product and the power of described data block intermediate data and with the both sides data power of current feature window and product;
Step F: with the transmitting power of described data block both sides data and with the middle power of current feature window and product and the power of described data block intermediate data and with described current feature window in data block the right and left data power and product compare, according to comparative result, determine whether to upgrade in the current feature window the right and left data power and and current feature window in intermediate data power and, if the transmitting power of described data block both sides data and with the middle power of current feature window and product less than the power of described data block intermediate data and with the both sides data power of current feature window and product, with the both sides data power of current feature window and be updated to described data block both sides data power and, the intermediate data power of current feature window and be updated to described data block intermediate data power and, the position of current feature window is updated to the current location that described feature window is searched, otherwise, with the both sides data power of current feature window and and intermediate data power and and the position remain unchanged;
Step G: according to the current location information of feature window search, judge whether continue to search the feature window, if the current location of feature window search is not the position of last reception data, just the current location with the search of feature window increases by a predefined step-length, above-mentioned computing from step B to step G then circulates, continue to search the feature window, if the current location of feature window search is the position of last reception data, finish to search the computing of feature window, at this moment, current feature window position promptly is the feature window of being sought.
2. method according to claim 1 is characterized in that, described predefined step-length can be arbitrary value of 1 to 16 chip.
3. method according to claim 1 and 2 is characterized in that, the data block length of described predetermined length is 128 chips, and the both sides data length is meant that left side length is 32 chips, and intermediate data length is 64 chips, and right data length is 32 chips.
4. method according to claim 1 and 2 is characterized in that described data block length is consistent with the length of characteristic window.
5. method according to claim 3 is characterized in that described data block length is consistent with the length of characteristic window.
6. method according to claim 1 and 2 is characterized in that, described frame is 6400 chips.
7. method according to claim 3 is characterized in that, described frame is 6400 chips.
8. method according to claim 4 is characterized in that, described frame is 6400 chips.
9. method according to claim 5 is characterized in that, described frame is 6400 chips.
10. device that reduces the cell initial search operand and improve operational precision, it is to adopt the method for searching down-bound pilot frequency signal by the feature window, the length of characteristic window is a predetermined length, it is characterized in that, comprising: a memory cell, the current location memory cell that one feature window is searched, one power calculation unit, an adder unit, a multiplication unit, one comparing unit, a current feature window memory cell and a cycling element;
Described memory cell is used to store all and receives data-signals, and the current location memory cell of itself and described power calculation unit, the search of described feature window links;
The current location memory cell that described feature window is searched is used to store and carries out the current location that the feature window is searched, and itself and described cycling element, described memory cell, described power calculation unit link;
Described current feature window memory cell, be used to store possible feature window both sides data transmitting power and, the intermediate data signal transmission power and and positional information, it links with described multiplication unit and comparing unit respectively;
Described power calculation unit, be used for the positional information of being stored in the current location memory cell according to the search of feature window, read the data block that a length is predetermined length from the current location information corresponding position of memory cell and the search of feature window, and calculate the transmitting power of each data-signal in this data block, itself and the current location of feature window search, described adder unit, described memory cell link;
Described adder unit is used for the transmitting power sum and the intermediate data signal transmission power sum of both sides data in the calculated data piece, and itself and described multiplication unit, described power calculation unit link; Described multiplication unit, the transmitting power sum and the intermediate data signal transmission power sum of both sides data in the described data block of the transmitting power sum of the both sides data in the current feature window of being stored according to current feature window memory cell and intermediate data signal transmission power sum and the output of described adder unit, the transmitting power sum of the calculated data piece both sides data power sum that multiply by the middle power sum of current feature window and data block intermediate data multiply by the both sides data power sum of current feature window respectively, itself and described adder unit, described comparing unit, described current feature window memory cell links;
Described comparing unit, be used for the both sides data power sum that power sum that transmitting power sum with the data block both sides data of described multiplication unit output multiply by the middle power sum of current feature window and data block intermediate data multiply by current feature window and compare, it links with described multiplication unit, described cycling element and current feature window memory cell respectively;
Described cycling element, the current location that the feature window of being stored according to the current location memory cell of feature window search is searched judges whether continue to search the feature window, itself and the current location memory cell of feature window search, described comparing unit link,
If the current location of the feature window search that the current location memory cell of cycling element judging characteristic window search is stored is not the end of memory cell, the current location that the feature window of just the current location memory cell of feature window search being stored is searched increases by a predetermined step-length, and repeat described power calculation unit, described adder unit, described multiplication unit, the computing of described comparing unit and described cycling element; If the current location of the feature window search that the current location memory cell of cycling element judging characteristic window search is stored is the end of memory cell then finishes computing.
11. device according to claim 10 is characterized in that, further comprises:
One reading unit, it is used for from the memory cell reading of data, and it links with the current location memory cell of described memory cell, power calculation unit and the search of feature window respectively.
12. device according to claim 10 is characterized in that, further comprises:
One writing unit, it is used for writing data to described current feature window memory cell, and it links with described current feature window memory cell, described cycling element and described comparing unit respectively.
13. device according to claim 10 is characterized in that, further comprises: a reading unit, a writing unit;
Described reading unit, it is used for from the memory cell reading of data, its respectively with described memory cell, the current location memory cell and the power calculation unit of the search of described feature window link;
The said write unit, it is used for writing data to described current feature window memory cell, and it links with described current feature window memory cell, described cycling element and described comparing unit respectively.
14. according to the arbitrary described device of claim 10-13, it is characterized in that described cycling element can further comprise: a feature window is searched a step-length memory cell and a feature window predetermined length memory cell.
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|---|---|---|---|---|
| JP4592546B2 (en) * | 2005-08-24 | 2010-12-01 | 株式会社エヌ・ティ・ティ・ドコモ | Transmission power control method and radio network controller |
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