CN101651465B - Carrier ordering method and device - Google Patents

Abstract

The present invention provides a carrier ordering method and device. The carrier ordering device includes: a first comparator, which, after comparison, selects the carrier with the energy value equal to or equal to or greater than the first threshold value to form a first carrier list; a second comparator, which, after comparison, selects the carriers with the characteristic window detect result equal to or larger than the second threshold value to form a second carrier list; a categorizer, which classifies the first carrier existing in the second carrier list as a first species of carrier, classifies the carriers in the second carrier list except the first species of carriers as the second species of the carriers, and classifies the carriers in the first carrier list except the first species of carriers as the third species of the carriers; and an ordering device, which orders the first species of carriers according to the sizes of the characteristic window ratio, orders the second species of carriers according to the sizes of the characteristic window ratio, and orders the second species of carriers according to the sizes of energies.

Description

Carrier ordering method and device

Technical field

The present invention relates to TD SDMA (TD-SCDMA) system, when relating more specifically in TD-SCDMA system, carry out the method and apparatus of carrier wave sequence and merge based on rapid AGC mechanism the equipment that Window detects and carrier wave sorts of carrying out based on signal energy intensity and shape.

Background technology

In TD-SCDMA system, subscriber equipment (UE) is in the time starting shooting for the first time, and its top priority is to obtain carrier wave and the timing information of suitable cell.Because there is not any known carrier information in advance, so need to attempt one by one all possible carrier waves.But the process more complicated of searching for whole community, need to expend a large amount of time and operand.Taking TD-SCDMA as example, its frequency bandwidth is about 1.6MHz.But third generation partner program (3GPP) standard do not clearly define to the position of centered carrier, just having defined centered carrier can be in the integral multiple position of any 200KHz.If all possible carrier wave is attempted one by one as interval taking 200KHz according to order, will be poor efficiency very.Therefore, in the starting stage, be necessary to likely carrier wave screen in advance and sort, to improve the efficiency of whole cell search process.

Current common sort method is the signal energy of all candidate carrier of traversal, then produces the carrier list through sequence according to the order of energy intensity (RSSI intensity).This method extensively adopts for many manufacturers.But, be well known that, TD-SCDMA system is typical time division duplex (TDD) system, and uplink downlink adopts the transmitting of identical frequency, this means from the energy intensity of the uplink channel interference of neighboring user equipment may be far away higher than the energy intensity of down link.Therefore, above mentioned traditional sort method unreliable.

For example, having other users near active user in the time transmitting and active user and other users are far away apart from base station, the peak signal energy that active user records not is the signal of base station transmitting, but the interference of neighboring user to it.In other words, in fact do not reflected the power of base station transmit signals by the signal energy intensity (RSSI intensity) of this carrier estimation.Obviously, this sort method is very inaccurate.

Summary of the invention

In order to address the above problem, first inventor investigates the frame format of TD-SCDMA system.Referring to Figure 1A-1C; Figure 1A shows the physical frame formats of TD-SCDMA; Figure 1B shows the form of a DwPTS time slot in TD-SCDMA subframe, and Fig. 1 C shows the energy shape that the adjacent protection of SYNC_DL (descending synchronous code) field and left and right thereof interval forms.From Figure 1A, a TD-SCDMA frame comprises two subframes (for example, the frame i in Figure 1A comprises subframe 1 and 2), and signal was constantly sent by the 5ms cycle of subframe, and wherein, each subframe comprises 6400 chips (chip).For example, and each subframe (, the subframe 1 in Figure 1A) is divided into again 7 normal time slot TS0-TS6 and three special time slot DwPTS (descending pilot frequency time slot), GP (protection time slot) and UpPTS (uplink pilot time slot).From Figure 1B, special time slot DwPTS comprises the protection interval GP of 32 chips and the descending synchronous code SYNC_DL of 64 chips, and wherein GP means does not have signal to send.Utilize this feature, can be formed in unique and unique a kind of power shape in each 5ms period of sub-frame (6400 chip), as shown in Figure 1 C.And Window detection technique is just based on this power shape.Therefore, inventor expects carrying out carrier wave sequence according to this power shape, to improve the accuracy of sequence.

Thus, the present invention proposes a kind of not only carrier wave ordering techniques based on signal energy intensity but also based on signal energy shape.Compared with the traditional technology only sorting based on signal energy intensity, carrier wave ordering techniques of the present invention can be avoided the inaccurate problem of sequence causing due to the uplink interference of contiguous UE substantially.

According to carrier wave ordering techniques of the present invention, before carrying out carrier wave sequence, need to obtain the energy intensity value of all carrier waves and Window testing result (that is, energy shape).For this reason, inventor has proposed a kind of by the scheme of carrier wave sequence and the processing of Window combining data detection, and this can realize by introducing rapid AGC mechanism.

According to one aspect of the invention, a kind of carrier wave collator is provided, comprise: the first comparator, is configured to the energy value of each candidate carrier and first threshold to compare, and exports carrier wave that energy value is equal to or greater than described first threshold to form first carrier list; The second comparator, be configured to Window testing result and the Second Threshold of each candidate carrier to compare, and the carrier wave that output characteristic window testing result is equal to or greater than described Second Threshold to be to form the second carrier list, described Window testing result is the corresponding maximum Window ratio of each candidate carrier; Grader, be configured to the carrier wave being present in described first carrier list in described the second carrier list to classify as first kind carrier wave, the carrier wave except described first kind carrier wave in described the second carrier list is classified as to Equations of The Second Kind carrier wave, and the carrier wave except described first kind carrier wave in described first carrier list is classified as to the 3rd class carrier wave; And sorting unit, be configured to described first kind carrier wave to sort according to Window ratio size, described Equations of The Second Kind carrier wave is sorted according to Window ratio size, and described the 3rd class carrier wave is sorted according to energy size.

According to a further aspect of the present invention, a kind of carrier ordering method is provided, it comprises the following steps: the energy value of each candidate carrier and first threshold are compared, and export carrier wave that energy value is equal to or greater than described first threshold to form first carrier list; Window testing result and the Second Threshold of each candidate carrier are compared, and the carrier wave that output characteristic window testing result is equal to or greater than described Second Threshold to be to form the second carrier list, described Window testing result is the corresponding maximum Window ratio of each candidate carrier; The carrier wave being present in described first carrier list in described the second carrier list is classified as to first kind carrier wave, the carrier wave except described first kind carrier wave in described the second carrier list is classified as to Equations of The Second Kind carrier wave, and the carrier wave except described first kind carrier wave in described first carrier list is classified as to the 3rd class carrier wave; And described first kind carrier wave is sorted according to Window ratio size, described Equations of The Second Kind carrier wave is sorted according to Window ratio size, and described the 3rd class carrier wave is sorted according to energy size.

Another aspect according to the present invention, provides a kind of and has merged and carry out the equipment that Window detects and carrier wave sorts based on rapid AGC mechanism, comprises above-mentioned carrier wave collator.

Other object of the present invention and advantage are clearly visible from detailed description below.

Brief description of the drawings

Reading in conjunction with the drawings following detailed description will more intactly understand the present invention, in the accompanying drawings:

Figure 1A shows the frame format of TD-SCDMA system;

Figure 1B shows the form of the DwPTS time slot in TD-SCDMA system subframe;

Fig. 1 C illustrates the energy shape that the adjacent protection of SYNC_DL field and left and right thereof interval forms;

Fig. 2 is the brief block diagram that the configuration of TD-SCDMA wireless communication system is shown;

Fig. 3 is the brief block diagram that the concrete structure of subscriber equipment shown in Fig. 2 is shown;

Fig. 4 illustrates the block diagram of the configuration of carrier wave collator according to an embodiment of the invention;

Fig. 5 illustrates the block diagram of the configuration of carrier wave collator in accordance with another embodiment of the present invention;

Fig. 6 illustrates the flow chart of the processing of carrier ordering method according to an embodiment of the invention;

Fig. 7 illustrates the schematic block diagram that merges according to an embodiment of the invention the overview of the equipment of carrying out Window detection and carrier wave sequence based on quick A GC; And

Fig. 8 illustrates merging and carrying out that Window detects and the block diagram of detailed configuration of the equipment that carrier wave sorts based on quick A GC shown in Fig. 7.

Embodiment

In conjunction with the preferred embodiments of the present invention, the present invention is described referring now to accompanying drawing.But it will be understood by those skilled in the art that the present invention is not limited to these preferred embodiments, but cover the alternative body, amendment body and/or the equivalent that are included in the spirit and scope of the present invention that claims limit.In the following description, many details have been set forth so that thorough understanding of the present invention to be provided.But, not it will be understood by those skilled in the art that in the case of having and some or all in these details, can implement the present invention yet.In other cases, for fear of unnecessarily fuzzy the present invention, and do not describe known mechanism in detail.

Here it should be noted that similar label is indicated similar part in each width figure.Here the each width figure also describing illustrated in is used to illustrate each feature of the present invention.Be illustrated in a width figure with regard to special characteristic and but do not have with regard to situation about being illustrated in another width figure, except as otherwise noted or structure forbid being inherently incorporated to this feature, should be understood to those features and can be suitable for being included in the embodiment that other accompanying drawing presents, just looks like that they are intactly illustrated the same in those accompanying drawings.Except as otherwise noted, accompanying drawing is uninevitable proportional.Any yardstick that accompanying drawing provides is not intended scope of the present invention to limit, and is only schematic.

Fig. 2 shows the brief block diagram of TD-SCDMA wireless communication system.As shown in Figure 2, this wireless communication system mainly comprises core net 202, wireless access network 204 and subscriber equipment 206.Core net 202 is main process audio call, data connection and exchange, customer position information management, network characteristic and Service control, signaling and user profile transmission mechanism in wireless communication system and with being connected and route etc. of other network.Wireless access network 204 provides the connection of subscriber equipment and core net, and the management of responsible Radio Resource and allotment, comprises base station and radio network controller two category nodes.Subscriber equipment 206 can be for example the Portable data processing equipment that mobile phone, personal digital assistant (PDA) or other have the function communicating in TD-SCDMA wireless communication system.

Fig. 3 shows the brief block diagram of the concrete structure of subscriber equipment shown in Fig. 2.As shown in Figure 3, this subscriber equipment mainly comprises: radio-frequency module 301, AGC module 302, forming filter 303, synchronization module 304, channel estimation module 305, multipath tracking module 306, activates detection module 307, joint-detection module 308, frequency deviation estimating modules 309, ANR/SNR measurement module 310, demapping (demapping) module 311 and decoder module 312.Radio-frequency module 301 unloads ripple and analog-to-digital conversion processing to received analog signal, is input to subordinate so that the analog signal being received is transformed to baseband digital signal.AGC module 302 is carried out automatic gain control to signal.Forming filter 303, root raised cosine filter (SRRC) carries out pulse shaping to baseband digital signal.Synchronization module 304 is for making subscriber equipment get thick Timing Synchronization and the further meticulous Timing Synchronization etc. of community.Channel estimation module 305 carries out the channel estimating of multiple communities for the midamble code sequence in the signal after pulse shaping.Multipath tracking module 306 is utilized channel estimation results, determines optimum sampling point, and carries out the multipath window position tracking of each community.Activate detection module 307 and activate detection and code channel activating detection for carrying out window.Joint-detection module 308 is carried out certain calculating to the data that are aliasing in each code channel together, obtains the transmission symbol on each code channel.Frequency deviation estimating modules 309 is utilized the skew of joint detection results estimated frequency.ANR/SNR measurement module 310 utilizes joint detection results to carry out amplitude and noise ratio (ANR) and signal to noise ratio (SNR) is measured.Demapping module 311 is that soft bit is delivered to decoder module by the symbol transition of joint-detection module output.Decoder module 312, to the soft bit result of demapping module output is decoded, obtains information bit.

The present invention relates generally to carrier wave ordering techniques to adopting in synchronization module and this carrier wave ordering techniques and Window and detects the improvement of the Coordination Treatment of (CWD) technology.Should be noted that, although provided TD-SCDMA wireless communication system as shown in Figures 2 and 3 and the ios dhcp sample configuration IOS DHCP of subscriber equipment above, but can recognize, can use therein communication system of the present invention and subscriber equipment to be not limited to this concrete example, but can be suitable for adopting carrier wave ordering techniques and/or CWD technology to carry out signal synchronous various systems and equipment.

Describe carrier wave collator according to an embodiment of the invention in detail below with reference to Fig. 4.Carrier wave collator 400 shown in Fig. 4 comprises the first comparator 401, the second comparator 402, the first sorting unit 403, the second sorting unit 404, grader 405 and order rearrangement device 406.

The first comparator 401 is by the energy value E of all carrier waves _kwith first threshold E _th1compare, and give up all E _k< E _th1carrier wave, thereby output energy value E _kbe equal to or greater than E _th1carrier wave form first carrier list.In one example, first threshold E _th1calculated by following formula by first threshold calculator (not shown):

$E_{\mathrm{mean}}=\frac{\underset{k=1}{\overset{N}{\mathrm{\&Sigma;}}}{E}_k}{N}---\left(1\right)$

$E_{\mathrm{th}1}=\frac{\mathrm{\&Sigma;}\left\{E_k\right|E_k<E_{\mathrm{mean}},k=\mathrm{1,2},...N\}}{M}---\left(2\right)$

Wherein, E _kfor carrier energy value, k=1,2 ... N, the number that N is candidate carrier; M is E _k< E _meannumber.From formula (1) and (2), first threshold calculator calculates the average energy E of all candidate carrier _mean, and the average energy of those carrier waves that calculating energy value is less than this mean value is as first threshold E _th1.It should be noted that above a kind of way of example of just calculating first threshold, the energy comparison carrying out based on this threshold value is from the very weak fraction carrier wave of conservative angle filtered signal energy.But those skilled in the art all understand, also can first threshold be set to other value with the more or less carrier wave of filtering in different application scenarios.

The Window testing result of the second comparator 402 to all candidate carrier (,, for the detected maximum Window ratio of each carrier wave, is designated hereinafter simply as the Window ratio R of carrier wave _k, k=1,2 ... N, the number that N is candidate carrier) and Second Threshold R _th2compare, and give up all R _k< R _th2carrier wave, thereby output characteristic window ratio R _kbe equal to or greater than Second Threshold R _th2carrier wave to form the second carrier list.Here Second Threshold R, _th2can determine with reference to 3GPP (third generation partner program) regulation of agreement and the network configuration of operator.

The first sorting unit 403 to the first carrier list of exporting from the first comparator 401, energy value is equal to or greater than first threshold E _th1thereby carrier wave by energy sort from big to small obtain sequence after first carrier list.

The second sorting unit 404 to the second carrier list of exporting from the second comparator 402, Window ratio is equal to or greater than Second Threshold R _th2carrier wave sort from big to small by Window ratio, thereby obtain sequence after the second carrier list.

Should understand, provide the first and second sorting units 403 and 404 can make carrier wave sort more accurately and reliably, thereby on probability meaning, save time and the UE power consumption of Cell searching.

(grader 405 classifies as " category-A " carrier wave by those carrier waves the second carrier list of exporting from the second sorting unit 404, that be present in the first carrier list of exporting from the first sorting unit 403, first kind carrier wave of the present invention), (the carrier wave except " category-A " carrier wave in the second carrier list is classified as to " category-B " carrier wave, Equations of The Second Kind carrier wave of the present invention), and the carrier wave except " category-A " carrier wave in first carrier list is classified as to " C class " carrier wave (, the 3rd class carrier wave of the present invention).

Order rearrangement device 406 is resequenced " category-A " carrier wave from big to small according to Window ratio, " category-B " carrier wave is also resequenced from big to small according to Window ratio, and " C class " carrier wave is resequenced from big to small according to energy, thereby obtain the final carrier wave sorted lists with priority.

As mentioned above, the principle according to the carrier wave collator of this embodiment of the invention according to " Window preferential, take into account signal energy ", is divided into three classes by carrier wave: " category-A " carrier wave: Window is very strong, and signal energy is stronger; " category-B " carrier wave: Window is stronger, signal energy a little less than; " C class " carrier wave: Window is not strong, but signal energy is stronger.Adopt different follow-up dispatch deals for this three classes carrier wave, can greatly save the expense of hardware computing and the time of Cell searching generally.Particularly, in subsequent treatment, to be SYNC_DL (descending synchronous code) among a small circle for " category-A " carrier wave and be correlated with to realize meticulous time synchronized, if unsuccessful, the SYNC_DL on a large scale that also needs to try again is correlated with, if again unsuccessful, writes off and switched carrier; To be SYNC_DL among a small circle equally for " category-B " carrier wave and be correlated with to realize meticulous time synchronized, if but unsuccessful, write off and switched carrier; To be SYNC_DL on a large scale for " C class " carrier wave and be correlated with, if unsuccessful, write off and switched carrier.

Describe according to the carrier wave collator 500 of second embodiment of the invention below with reference to Fig. 5.Except grader 505 and the 3rd threshold calculations device 507 that newly increases, identical with the first embodiment according to the carrier wave collator 500 of the present embodiment, below will omission being repeated in this description those identical component parts.The 3rd threshold calculations device 507 is for example asked average energy to all carrier waves in the first carrier list from the first sorting unit 403 (or, the first comparator 401) output, as the 3rd threshold value E _th3.The function of grader 505 is similar to grader 405, and it is configured to further by the energy value of " category-A " carrier wave and the 3rd threshold value E _th3compare, delete from " category-A " carrier wave the carrier wave that energy value is less than or equal to the 3rd threshold value, and the carrier wave of deleting from " category-A " carrier wave is heavily referred to " category-B " carrier wave.

The carrier wave that further filters out " Window is very strong; signal energy is also very strong " from former " category-A " carrier wave of " Window is very strong; signal energy is stronger " according to the carrier wave collator of second embodiment of the invention is as new " category-A " carrier wave, and the carrier wave of all the other " Window is very strong; signal energy is stronger " in former " category-A " carrier wave is merged and becomes new " category-B " carrier wave with former " category-B " carrier wave of " Window is stronger, and signal energy is weak ".

In addition, although also not shown, according to another embodiment, can from Fig. 4 and Fig. 5, omit the first sorting unit 403 and the second sorting unit 404.In this case, the first comparator 401 is exported by energy value E _kbe equal to or greater than E _th1carrier wave form unordered first carrier list, the second comparator 402 is exported by Window ratio R _kbe equal to or greater than Second Threshold R _th2carrier wave form the second unordered carrier list.These first and second unordered carrier list are directly input into grader 405 or 505, then experience postorder processing same as described above.

Below with reference to Fig. 6, carrier ordering method is according to an embodiment of the invention described.Fig. 6 is the flow chart that the processing procedure of the carrier ordering method 600 of the present embodiment is shown.

Processing starts from step S601, and wherein, the first comparator 401 is by the energy value E of all carrier waves _kwith first threshold E _th1compare, and give up all E _k< E _th1carrier wave, thereby output energy value E _kbe equal to or greater than E _th1carrier wave to form first carrier list.In one example, by calculating the average energy E of all candidate carrier _mean, and calculating energy value is less than this mean value E _meanthe average energy of those carrier waves as first threshold E _th1(referring to formula (1) and (2)).Should understand, this is only an example calculating first threshold, but not limitation of the present invention, under different application scenarios, first threshold also can be configured to other value.

At step S602, the first sorting unit 403 to the first carrier list of exporting from the first comparator 401, energy value is equal to or greater than first threshold E _th1thereby carrier wave sort from big to small and obtain the first carrier list through presort by energy.

At step S603, the Window ratio R of the second comparator 402 to all candidate carrier _kwith Second Threshold R _th2compare, and give up all R _k< R _th2carrier wave, thereby output characteristic window ratio R _kbe equal to or greater than Second Threshold R _th2carrier wave to form the second carrier list.Second Threshold R _th2can determine with reference to 3GPP (third generation partner program) regulation of agreement and the network configuration of operator.

At step S604, the second sorting unit 404 to the second carrier list of exporting from the second comparator 402, Window ratio is equal to or greater than Second Threshold R _th2carrier wave sort from big to small by Window ratio, thereby obtain the second carrier list through presort.

At step S605, those carrier waves the second carrier list of exporting from the second sorting unit 404, that be present in the first carrier list of exporting from the first sorting unit 403 are classified as " category-A " carrier wave by grader 405, the carrier wave except " category-A " carrier wave in the second carrier list is classified as to " category-B " carrier wave, and the carrier wave except " category-A " carrier wave in first carrier list is classified as to " C class " carrier wave.

At step S606, order rearrangement device 406 is resequenced " category-A " carrier wave from big to small according to Window ratio, " category-B " carrier wave is also resequenced from big to small according to Window ratio, and " C class " carrier wave is resequenced from big to small according to energy, thereby obtain final carrier wave sorted lists.

According to another embodiment, carrier ordering method of the present invention can also comprise that the average energy that calculates all carrier waves in first carrier list is as the 3rd threshold value E _th3step.In this case, grader is further by the energy value of " category-A " carrier wave and the 3rd threshold value E _th3compare, to delete from " category-A " carrier wave the carrier wave that energy value is less than or equal to the 3rd threshold value, and the carrier wave of deleting from " category-A " carrier wave is referred to " category-B " carrier wave.

Should understand, it not is essential before classification, the carrier wave in first carrier list and the second carrier list being sorted, and therefore can from the carrier ordering method shown in Fig. 6, omit step S602 and S604.In this case, directly export by energy value E by comparison and selection _kbe equal to or greater than E _th1the unordered first carrier list that forms of carrier wave, and directly export by Window ratio R by comparison and selection _kbe equal to or greater than Second Threshold R _th2carrier wave form the second unordered carrier list, for subsequent treatment.

According to carrier wave ordering techniques of the present invention, before carrying out carrier wave sequence, need to obtain energy value and the Window testing result of all carrier waves.But in conventional art, it is the process that two independences, serial are carried out that carrier wave sequence and Window detect.In order more to save the processing time, inventor has proposed a kind of by the scheme of carrier wave sequence and the processing of Window combining data detection, and this can realize by introducing rapid AGC mechanism.

Fig. 7 shows the schematic block diagram that merges according to an embodiment of the invention the equipment 700 of carrying out Window detection and carrier wave sequence based on quick A GC.As shown in Figure 7, equipment 700 comprises carrier wave switching device shifter 701, AGC control device 702, signal energy estimation unit 703, features window detecting device 704, carrier wave collator 705.Carrier wave switching device shifter 701 is for pressing predetermined period switched carrier.AGC control device 702 is for carrying out speed automatic gain control to input signal so that the dynamic change of tracking signal intensity rapidly, for example, the adjustment cycle that can AGC gains is set between 140-300 chip, and this is very fast with respect to the 6400 chip period of sub-frame of AGC at a slow speed.Signal energy estimation unit 703 is estimated the energy value of all candidate carrier for the input signal based on adjusting through 702 gains of AGC control device.Features window detecting device 704 is for the Window result (, the maximum Window ratio of each carrier wave) of all candidate carrier of input signal detection based on adjusting through 702 gains of AGC control device.Carrier wave collator 705 is for based on being estimated the energy value of all carrier waves that obtain by signal energy estimation unit 703 and detecting that by features window detecting device 704 the maximum Window ratio of all carrier waves sorts to carrier wave.

As mentioned above, by adopting rapid AGC mechanism, can make signal energy estimation and Window detect and carry out simultaneously, so be more applicable to adopting carrier wave ordering techniques of the present invention, this has a great deal of practical meanings.

Describe merging and carrying out the example arrangement of equipment 700 that Window detects and carrier wave sorts based on quick A GC shown in Fig. 7 in detail below with reference to Fig. 8.In the example arrangement of Fig. 8, quick A GC control device comprises amplifying device 801, ADC (analog to digital converter) 802, signal energy estimator 803, accumulator 804, loop filter 805, comparator 806 and AGC gain limiter 807; Features window detecting device comprises circular buffer 810, CWD ratio calculation device 811, the second maximum-value selector 812 and carrier wave CWD ratio buffer 813; Signal energy estimation unit comprises signal energy estimator 803, accumulator 804, the first maximum-value selector 808 and carrier energy buffer 809; Carrier wave collator comprises comparator 814, carrier wave grader 815 and carrier wave sorting unit 816; And carrier wave switching device shifter comprises sub-frame count device 817 and carrier wave switch 818.

Below by the configuration of the quick A GC control device in detailed description equipment 700.

Amplifying device 801 receives input signal, is amplified necessarily and outputs to ADC 802 after gain.According to an example, amplifying device 801 can comprise distributes to several different amplifiers by yield value and by the AGC driver 8011 of its configuration take-effective; Gain is the amplifier 8012 of gain1; Gain is the amplifier 8013 of gain2; And the RF exporting from amplifier 8012 (radio frequency) signal is processed, be down-converted to base band and exported the RF module 8014 of base-band analog signal.

The analog signal of exporting from amplifying device 801 is converted to digital signal by ADC 802, and the digital signal obtaining is outputed to signal energy estimator 803.

Signal energy estimator 803 carries out energy estimation by following formula to every chip digital signal of exporting from ADC 802, and result is outputed to accumulator 804:

e _k＝r _k，i ²+r _k，q ²(3)

Wherein, r _{k, i}and r _{k, q}the complex signal r exporting from ADC 802 _ki road and Q road signal.

Accumulator 804 is the energy value e of the cumulative chip of inputting one by one under counter controls for example _k, when each counter expires, accumulator 804 stops adding up, and by accumulated value E now _noutput to loop filter 805.According to an example, the accumulation period of accumulator can be configured to the little any period of gain adjustment cycle than quick A GC control device, controls as long as can realize quick A GC.

Loop filter 805 carries out filtering to the output of accumulator 804, is beneficial to the stable of quick A GC loop.

Thereby comparator 806 compares the AGC desired value of the energy accumulation value through loop filter 805 filtering and expectation the adjustment amount of answering that calculates AGC gain, and this adjustment amount is outputed to AGC gain limiter 807.

AGC gain limiter 807 adjustment amount (, the difference that comparator 806 is exported) that gain is adjusted to AGC carries out bound restriction, makes in its scope that is in [+/-adjustment amount KB limit].The yield value of the amount of gain adjustment limiting through AGC gain limiter 807 and current gain adjustment cycle is added and obtains the yield value of next gain adjustment cycle, and this yield value is output to amplifying device 801 with the scalar gain as amplifying device 801.

Like this, just form quick A GC closed loop.Well-designed by carrying out at the aspect such as such as adjustment cycle, adjustment step-length, maximum adjustment amount restriction, this rapid AGC mechanism detects Window and carrier wave sequence can merge execution.

Below by the configuration of the CWD device in detailed description equipment 700.CWD detects the capacity volume variance of utilizing descending synchronous code SYNC_DL and protection interval, left and right (GAP) thereof, need to use altogether the data (left side 32 chips+middle 64 chips+the right 32 chips) of 128 chips, and needs the calculating of sliding.In the CWD of the present embodiment device, circular buffer 810 is provided for the energy value of each chip that buffer memory exports from signal energy estimator 803 so that carrying out to slide calculates, and its length is 128 chips.CWD ratio calculation device 811 calculates the corresponding energy ratio of each chip:

$R_k=\frac{E_B*(E_A+E_C)}{{E_A}^2+{E_C}^2}---\left(4\right)$

Wherein, E _athe energy accumulation value of the left side 32 chip data, E _bthe energy accumulation value of 64 chip data in the middle of being, E _cit is the energy accumulation value of the right 32 chip data.The maximum CWD energy ratio that the second maximum-value selector 812 is selected a subframe by " relatively/selection " is as the corresponding CWD testing result of this subframe.In the situation that need to moving multiple subframe for a carrier wave, the second maximum-value selector 812 also needs to select maximum in the CWD testing result of the moved multiple subframes CWD testing result (, thick sync bit) as corresponding carriers.In addition, the second maximum-value selector 812 is gone back the control of acceptor frame counter 817 (describing after a while) and in the time of each switched carrier, value is wherein reset to zero.Carrier wave CWD ratio buffer 813 is for writing the corresponding cache location of current carrier wave by the maximum CWD ratio of current carrier wave selected the second maximum-value selector 812, and under the control of sub-frame count device 817, in the time of each switched carrier, mobile writing position.

Above-described CWD checkout gear has adopted an example structure well known in the art.But, it will be understood by those skilled in the art that the applicable CWD checkout gear of the present invention also can comprise other component parts, to operate in conjunction with rapid AGC mechanism better.

Now, by the configuration of the energy estimation unit in detailed description equipment 700.Comprise the signal energy estimator 803 shared with quick A GC control device and accumulator 804 according to the energy estimation unit of the present embodiment, no longer these two composite devices are repeated in this description here.In addition, the energy estimation unit of the present embodiment also comprises the first maximum-value selector 808 and carrier energy buffer 809.The first maximum-value selector 808 is selected maximum energy accumulation value each subframe, that export from accumulator 804 at each gain adjustment cycle by " relatively/select " and by its output.In the situation that need to moving multiple subframe for a carrier wave, the first maximum-value selector 808 also needs to select the maximum in the ceiling capacity accumulated value separately of moved multiple subframes energy value as corresponding carriers.In addition, the first maximum-value selector 808 is gone back the control of acceptor frame counter 817 (describing after a while) and in the time of each switched carrier, value is wherein reset to zero.Carrier energy buffer 809 is for writing the corresponding cache location of current carrier wave by the maximum energy value of current carrier wave selected the first maximum-value selector 808, and under the control of sub-frame count device 817, in the time of each switched carrier, mobile writing position.

Now, by the configuration of the carrier wave collator in description equipment 700.In the carrier wave collator of the present embodiment, the function of comparator 814 is identical with the second comparator 402 shown in Fig. 4, the function of carrier wave grader 815 is identical with the grader 405 shown in Fig. 4, and the function of carrier wave sorting unit 816 is identical with the order rearrangement device 406 shown in Fig. 4, therefore, be no longer repeated in this description here.Should understand, according to another example, the carrier wave collator of equipment 700 can have the configuration shown in Fig. 4 or Fig. 5 or other configuration.In addition, it should be noted that, the output of carrier wave sorting unit 816 comprises according to above-mentioned criterion sorts and the carrier wave ranking results (priority list) that generates and thick sync bit (, the corresponding positional information of maximum Window ratio of each carrier wave).Here, because the Window of " C class " carrier wave does not exist, so only store the thick sync bit of " category-A " and " category-B " carrier wave.

Finally, by the configuration of the carrier wave switching device shifter in description equipment 700.In the carrier wave switching device shifter of the present embodiment, sub-frame count device 817 is counted taking the number of sub frames for each carrier wave was moved as the cycle, when expiring, each counting exports reset (reset) signal to the first maximum-value selector 808 and the second maximum-value selector 812, to make the first maximum-value selector 808 and the second maximum-value selector 812 export current maximum and this value is reset to zero; Meanwhile, sub-frame count device 817 is exported triggering signal to carrier energy buffer 809 and carrier wave CWD ratio buffer 813, to make the writing position of mobile each buffer, thereby the corresponding maximum energy value of each carrier wave and maximum CWD ratio (Window testing result) are written into correct cache location.Meanwhile, in the time that each counting expires, sub-frame count device 817, also to carrier wave switch 818 outgoing carrier switching signals, switches current carrier wave to control carrier wave switch 818.

As mentioned above, pass through to introduce rapid AGC mechanism according to the detection of the Window based on quick A GC of the present invention and carrier wave sequencing equipment, can, by carrier wave sequence and the processing of Window combining data detection, also can reduce power consumption thereby can greatly shorten the processing time.In addition, comprehensively judge by while binding signal energy and Window shape, carrier wave is carried out to classification and ordination according to the criterion of " Window is preferential, and signal energy secondly ", can obtain higher sequence efficiency.

Below with reference to specific embodiments of the invention, the present invention has been described, but those skilled in the art are based on instruction of the present invention, can carry out various amendments, combination and change to these specific embodiments, these amendments, combination and change will fall in the spirit and scope of the present invention that limited by claims or its equivalent.

Can perform step with hardware or software as required.Note, without departing from the scope of the invention, can add step, therefrom remove step or amendment step wherein to the flow chart providing in this specification.In general, flow chart is just used to refer to a kind of possible sequence for the basic operation of practical function.

" buffer " mentioned in this article can be any medium, includes but not limited to electricity, magnetic, light, electromagnetism, infrared or semiconductor system, device, system, equipment, propagation medium or computer storage.

Embodiments of the invention can utilize programming general purpose digital computer, utilize application-specific integrated circuit (ASIC), programmable logic device, field programmable gate array, light, chemistry, biological, system quantum or nanometer engineering, assembly and mechanism to realize.In general, function of the present invention can be realized by any means known in the art.Can use distributed or networked system, assembly and circuit.The communication of data or to transmit can be wired, wireless or by any other means.

Also will recognize, according to the needs of application-specific, one or more can, by more separating or more integrated mode realizes, or being removed even in some cases or being deactivated in the key element shown in accompanying drawing.The journey logic bomb that realization can be stored in machine readable media is carried out above-mentioned any method with permission computer, also within the spirit and scope of the present invention.

In addition, it is only exemplary that any signal arrows in accompanying drawing should be considered to, instead of restrictive, unless separately there is concrete instruction.In addition, unless otherwise, term "or" used herein is generally to refer to "and/or".Make to separate or the ability of combination while not knowing when term is also contemplated as, the combination of assembly or step also will be considered to record.

Claims (10)

1. a carrier wave collator, comprising:

The first comparator, is configured to the energy value of each candidate carrier and first threshold to compare, and exports carrier wave that energy value is equal to or greater than described first threshold to form first carrier list;

The second comparator, be configured to Window testing result and the Second Threshold of each candidate carrier to compare, and the carrier wave that output characteristic window testing result is equal to or greater than described Second Threshold to be to form the second carrier list, described Window testing result is the corresponding maximum Window ratio of each candidate carrier;

Grader, be configured to the carrier wave being present in described first carrier list in described the second carrier list to classify as first kind carrier wave, the carrier wave except described first kind carrier wave in described the second carrier list is classified as to Equations of The Second Kind carrier wave, and the carrier wave except described first kind carrier wave in described first carrier list is classified as to the 3rd class carrier wave; And

Sorting unit, is configured to described first kind carrier wave to sort according to Window ratio size, described Equations of The Second Kind carrier wave is sorted according to Window ratio size, and described the 3rd class carrier wave is sorted according to energy size.

2. carrier wave collator according to claim 1, also comprises:

The first presort device, is configured to the carrier wave in described first carrier list to carry out presort by energy size; With

The second presort device, is configured to the carrier wave in described the second carrier list to carry out presort by Window ratio size.

3. carrier wave collator according to claim 1, also comprises:

First threshold calculator, is configured to calculate the average energy of all carrier waves, and calculating energy value is less than the average energy of the carrier wave of described mean value, and sets it as described first threshold.

4. carrier wave collator according to claim 1, also comprises:

The 3rd threshold calculations device, is configured to calculate the average energy of all carrier waves in described first carrier list, and sets it as the 3rd threshold value; And

Described grader is also configured to the energy value of first kind carrier wave described in each and described the 3rd threshold value to compare, delete from the described first kind carrier wave carrier wave that energy value is less than or equal to described the 3rd threshold value, and the carrier wave of deleting from described first kind carrier wave is heavily referred to described Equations of The Second Kind carrier wave.

5. a carrier ordering method, comprises the following steps:

The energy value of each candidate carrier and first threshold are compared, and export carrier wave that energy value is equal to or greater than described first threshold to form first carrier list;

Window testing result and the Second Threshold of each candidate carrier are compared, and the carrier wave that output characteristic window testing result is equal to or greater than described Second Threshold to be to form the second carrier list, described Window testing result is the corresponding maximum Window ratio of each candidate carrier;

The carrier wave being present in described first carrier list in described the second carrier list is classified as to first kind carrier wave, the carrier wave except described first kind carrier wave in described the second carrier list is classified as to Equations of The Second Kind carrier wave, and the carrier wave except described first kind carrier wave in described first carrier list is classified as to the 3rd class carrier wave; And

Described first kind carrier wave is sorted according to Window ratio size, described Equations of The Second Kind carrier wave is sorted according to Window ratio size, and described the 3rd class carrier wave is sorted according to energy size.

6. carrier ordering method according to claim 5, further comprising the steps of:

Carrier wave in described first carrier list is carried out to presort by energy size; With

Carrier wave in described the second carrier list is carried out to presort by Window ratio size.

7. carrier ordering method according to claim 5, wherein, described first threshold is the average energy by calculating all carrier waves, and calculating energy value is less than, and the average energy of the carrier wave of described mean value obtains.

8. carrier ordering method according to claim 5, also comprises the average energy that calculates all carrier waves in described first carrier list, and set it as the 3rd threshold value, and wherein, the step of described classification also comprises:

The energy value of first kind carrier wave described in each and described the 3rd threshold value are compared, delete from the described first kind carrier wave carrier wave that energy value is less than or equal to described the 3rd threshold value, and the carrier wave of deleting from described first kind carrier wave is heavily referred to described Equations of The Second Kind carrier wave.

9. merge and carry out the equipment that Window detects and carrier wave sorts based on rapid AGC mechanism, comprise carrier wave collator according to claim 1.

10. equipment according to claim 9, also comprises:

Adopt the AGC device of described rapid AGC mechanism, it carries out speed automatic gain control to input signal;

Carrier wave switching device shifter, it switches each candidate carrier by predetermined period;

Features window detecting device, it based on the described input signal of adjusting through described AGC device gain, detects the Window testing result corresponding with each candidate carrier under the control of described carrier wave switching device shifter; And

Energy estimation unit, it based on the described input signal of adjusting through described AGC device gain, estimates the signal energy value corresponding with each candidate carrier under the control of described carrier wave switching device shifter.