CN103516390B - Code channel activation detection method for same-frequency multiple cells of TD-SCDMA system and device thereof - Google Patents
Code channel activation detection method for same-frequency multiple cells of TD-SCDMA system and device thereof Download PDFInfo
- Publication number
- CN103516390B CN103516390B CN201210212652.2A CN201210212652A CN103516390B CN 103516390 B CN103516390 B CN 103516390B CN 201210212652 A CN201210212652 A CN 201210212652A CN 103516390 B CN103516390 B CN 103516390B
- Authority
- CN
- China
- Prior art keywords
- channel
- community
- code
- code channel
- power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The present invention discloses a code channel activation detection method for same-frequency multiple cells of a TD-SCDMA system, which comprises the following steps: dividing received outburst to a training sequence part and a data part; selecting all cells of which configuration information is acquired and cells that satisfy a preset condition and have configuration information that is not acquired in each same-frequency cell that corresponds with the training sequence part as reserving cells; acquiring all activated windows of each reserving cell; acquiring a descrambling data sequence of each reserving cell by means of the data part, and calculating the power of a comparing sequence, which corresponds with each reserving cell; and supposing all code channels in all activated windows of each reserving cell exist, calculating a ratio between the power of each code channel and the power of the comparing sequence, which corresponds with the cell with the code channel, and detecting whether a radio is larger than a threshold value, and if yes, determining the code channel to be the activated code channel. The invention further discloses a code channel activation detection method for the same-frequency multiple cells of the TD-SCDMA system.
Description
Technical field
The present invention relates to mobile communication system detection technique field, particularly relate to a kind of code channel activating detection method and device of TD-SCDMA system common frequency multi-cell.
Background technology
For TD-SCDMA system, in multiple communities of same frequency range, along with the increase of the number of users communicated simultaneously, multiple access interference is topmost interference.Joint-detection effectively can eliminate multi-access inference, suppresses near-far interference, increases substantially power system capacity and performance.In common frequency multi-cell, the corresponding multiple code channel of each channel estimating window possibility, therefore activate at window on the basis detected and need code-division activated detection, namely which code channel is detected occupied, the configuration information of occupied code channel is used for follow-up joint-detection, detects that the code channel of all CUs comprising interference user can improve combined detection performance.
Community code channel configuration information is broadcasted on the common channels, base station or terminal are when reception uplink/downlink signal, the channel configuration information obtaining the community of link setup with base station or terminal can be obtained on the common channels, directly cannot obtain the channel configuration information not obtaining the community of link setup with base station or terminal, existing code channel activating detection method does not consider that these do not obtain the code channel of the community of link setup, naturally inspection does not measure these and does not obtain occupied code channel and configuration information thereof in the code channel of the community of link setup, makes code-division activated detection result inaccurate.
Existing code channel activating detection method carries out for the code channel of the community obtaining link setup, specific practice all retains for the code channel of the theactivewindow in home cell, code channel in non-local community then divides first-selection and non-preferred two class to process, for first-selected code channel, if window is the state activated, then retaining this code channel, if non-preferred code channel, then will deciding whether to retain by comparing with the first-selected code channel remained.Even if but first-selected code channel, also may become more weak due to reasons such as decline or interference, so now so first-selected code channel should not remain, so with the reference factor whether first-selected code channel that should not remain retains as selection non-preferred code channel, also the selection of non-preferred code channel can be caused inaccurate, finally make code-division activated detection result inaccurate.
Therefore, the result of the code-division activated detection of existing code channel activating detection method is inaccurate, can affect the performance of follow-up joint-detection.
Summary of the invention
The present invention proposes a kind of code channel activating detection method and device of TD-SCDMA system common frequency multi-cell, can detect the code channel likely taken, and improves the accuracy of code-division activated detection.
In the code channel activating detection method of a kind of TD-SCDMA system common frequency multi-cell that the present invention proposes, generation one in advance and the cross correlation value of all channel codes, all lower than the contrast sequence of threshold value one, comprise step:
Steps A: be training sequence part and data division by the burst segmentation received;
Step B: to select in each co-frequency cell corresponding with described training sequence part all has obtained the community of configuration messages and has met the community not obtaining configuration messages of specified requirements as retaining community;
Step C: all activated window obtaining each described reservation community;
Step D: utilize described data division to obtain the descrambling data sequence of each described reservation community, calculate the power corresponding with each described reservation community of this contrast sequence;
Step e: suppose that all code channels in all activated window of each described reservation community all exist,
Each code channel in each theactivewindow obtained described in each in the community of configuration messages is handled as follows: utilize the described configuration messages obtained to calculate the power of this code channel, and calculate the ratio one of the power of this code channel and the power of the corresponding with this code channel affiliated subdistrict of this contrast sequence, detect the ratio one obtained according to this code channel and whether be greater than threshold value two, if so, then determine that this code channel is activated code channel; Described threshold value two obtains according to the correlation of this contrast sequence and all channel codes;
Each code channel in each theactivewindow do not obtained described in each in the community of configuration messages is handled as follows: utilize all channel codes to calculate the power of this code channel one by one, and calculate the ratio two of the power of this code channel and the power of the corresponding with this code channel affiliated subdistrict of this contrast sequence, detect the ratio two obtained according to this code channel and whether be greater than threshold value two, if so, then determine that this code channel is activated code channel.
Preferably,
Also comprise before step B after described steps A:
Step F: utilize described training sequence part to do channel estimating, the channel impulse response that the original channel obtaining each co-frequency cell corresponding with described training sequence part is estimated;
Described step C is specially: carry out point window process and window activation detection to the channel impulse response of each described reservation community, obtain all activated window of described reservation community.
Preferably,
Described step e specifically comprises:
Suppose that all code channels in all activated window of each described reservation community all exist,
Each code channel in each theactivewindow obtained described in each in the community of configuration messages is handled as follows:
Step e 11: select the channel code that this code channel is configured in described configuration messages;
Step e 12: the descrambling data sequence of the channel code be configured with this code channel described and the community belonging to this code channel does despreading, obtains the power of this code channel;
Step e 13: the ratio one obtaining the power of this code channel power corresponding with the community belonging to this code channel with this contrast sequence;
Step e 14: detect the ratio one obtained according to this code channel and whether be greater than threshold value two, if so, then determines that this code channel is activated code channel;
Each code channel for each theactivewindow do not obtained in the community of configuration messages described in each is handled as follows:
Step e 21: the channel code selecting a non-selected mistake in all channel codes;
Step e 22: the descrambling data sequence of the channel code selected by step e 21 and the community belonging to this code channel does despreading, obtains the power of this code channel corresponding;
Step e 23: the ratio two obtaining the power of this code channel power corresponding with the community belonging to this code channel with this contrast sequence;
Step e 24: detect the ratio two obtained according to this code channel and whether be greater than threshold value, if so, then determines that this code channel is activated code channel; If not, then step e 21 is returned.
Preferably,
In described step e 24 if, then determine that corresponding code channel is for also comprising after activated code channel: determine that the corresponding channel code selected in described step e 21 is the channel code that this code channel is configured, and determine the numerical value of the spreading factor that the theactivewindow belonging to this code channel is configured according to this channel code.
Preferably,
Described step B specifically comprises:
Step B1: to select in each co-frequency cell corresponding with described training sequence part all has obtained the community of configuration messages as retaining community;
Step B2: select the community not obtaining configuration messages meeting specified requirements in each co-frequency cell corresponding with described training sequence part as retaining community;
Described specified requirements is that the ratio of the power that power corresponding to the maximum diameter position of the community not obtaining configuration messages is corresponding with the maximum diameter position of home cell is greater than thresholding three;
Described step B2 specifically comprises:
Step B21: to obtain in described co-frequency cell each does not obtain power corresponding to the maximum diameter position of power corresponding to the maximum diameter position of the community of configuration messages and home cell;
Step B22: the ratio three calculating power corresponding to the maximum diameter position of power corresponding to each maximum diameter position not obtaining the community of configuration messages and home cell;
Step B23: detect the ratio three obtained according to each community not obtaining configuration messages and whether be greater than threshold value three, if so, then selects the community not obtaining configuration messages accordingly as reservation community.
Preferably,
Described specified requirements is that the ratio of the power that power corresponding to the maximum diameter position of the community not obtaining configuration messages is corresponding with the maximum diameter position of home cell is greater than thresholding three, and is less than thresholding four;
Detect described ratio three described in described step B23 whether to be greater than threshold value three and to comprise further: detect described ratio three and whether be less than threshold value four.
Preferably,
Described contrast sequence is all lower than the pseudo random sequence of threshold value one with the cross correlation value of all channel codes.
Preferably,
This method is applicable to upcoming base station as receiving terminal, or downstream station is as receiving terminal.
The present invention also proposes a kind of code-division activated detection device of TD-SCDMA system common frequency multi-cell, and this device comprises:
Contrast sequence generating unit, for, generation one in advance and the cross correlation value of all channel codes are all lower than the contrast sequence of threshold value one;
Data partitioning unit, for, be training sequence part and data division by the burst segmentation received;
Select to retain cell unit, for, the community that to select in each co-frequency cell corresponding with described training sequence part all has obtained configuration messages with meet the community not obtaining configuration messages of specified requirements as retaining community;
Processing unit, for, obtain all activated window of each described reservation community; Utilize described data division to obtain the descrambling data sequence of each described reservation community, calculate the power corresponding with each described reservation community of this contrast sequence;
Code-division activated detection unit, for, suppose that all code channels in all activated window of each described reservation community all exist,
Each code channel in each theactivewindow obtained described in each in the community of configuration messages: utilize the described configuration messages obtained to calculate the power of this code channel, and calculate the ratio one of the power of this code channel and the power of the corresponding with this code channel affiliated subdistrict of this contrast sequence, detect described ratio one and whether be greater than threshold value two, if so, then determine that corresponding code channel is activated code channel;
Each code channel in each theactivewindow do not obtained described in each in the community of configuration messages: utilize all channel codes to calculate the power of this code channel one by one, and calculate the ratio of the power of this code channel and the power of the corresponding with this code channel affiliated subdistrict of this contrast sequence, detect described ratio and whether be greater than threshold value two, if so, then determine that corresponding code channel is activated code channel.
Preferably,
Described device also comprises channel estimating unit, for, utilize described training sequence part to do channel estimating, the channel impulse response that the original channel obtaining each co-frequency cell corresponding with described training sequence part is estimated;
Described processing unit comprises windowing processing unit, Descrambling unit and contrast sequence power computing unit,
Described windowing processing unit, specifically for, point window process and window are carried out to the channel impulse response having obtained the community of configuration messages described in each and activate and detect, obtain each described in obtained all activated window of the community of configuration messages;
Described Descrambling unit, specifically for, be multiplied by with the unique corresponding scrambler in each described reservation community the descrambling data sequence that described data division obtains each described reservation community;
Described contrast sequence power computing unit, specifically for, do despreading operations with the descrambling data sequence of each described reservation community respectively by this contrast sequence, calculate the power corresponding with each described reservation community of this contrast sequence;
Described code-division activated detection unit comprises direct code channel activating detecting unit and traversal code-division activated detection unit,
Described direct code channel activating detecting unit processes each code channel in each theactivewindow obtained described in each in the community of configuration messages, comprise selective channel code unit one, power calculation unit one, ratio calculation unit one and ratio detecting unit one
Described selective channel code unit one, specifically for, in described configuration messages, select the channel code that this code channel is configured;
Described power calculation unit one, specifically for, the descrambling data sequence of the channel code be configured with this code channel described and the community belonging to this code channel does despreading, obtains the power of this code channel;
Described ratio calculation unit one, specifically for, obtain the ratio one of the power of this code channel and the power of the corresponding with the community belonging to this code channel of this contrast sequence;
Described ratio detecting unit one, specifically for, detect the ratio one obtained according to this code channel and whether be greater than threshold value two, if so, then determine that this code channel is activated code channel;
Described traversal code-division activated detection unit processes each code channel in each theactivewindow do not obtained described in each in the community of configuration messages, comprise selective channel code unit two, power calculation unit two, ratio calculation unit two and ratio detecting unit two
Described selective channel code unit two, specifically for, in all channel codes, select the channel code of a non-selected mistake;
Described power calculation unit two, specifically for, do despreading by the descrambling data sequence of the community belonging to the channel code selected by described selective channel code unit two and this code channel, obtain the power of this code channel corresponding;
Described ratio calculation unit two, specifically for, obtain the ratio two of the power of this code channel power corresponding with the community belonging to this code channel with this contrast sequence;
Described ratio detecting unit two, specifically for, detect the ratio two obtained according to this code channel and whether be greater than threshold value, if so, then determine that this code channel is activated code channel; If not, then selective channel code unit two is again activated.
Preferably,
Described selection retains cell unit and comprises selection reservation cell unit one and select to retain cell unit two,
Described selection retains cell unit one, specifically for, to select to retain in each co-frequency cell corresponding with described training sequence part, community all has obtained the community of configuration messages as retaining community;
Described selection retains cell unit two and comprises power calculation unit three, ratio calculation unit three and ratio detecting unit three,
Described power calculation unit three, specifically for, to obtain in described co-frequency cell all does not obtain power corresponding to the maximum diameter position of power corresponding to the maximum diameter position of the community of configuration messages and home cell;
Described ratio calculation unit three, specifically for, calculate the ratio three of power corresponding to the maximum diameter position of power corresponding to each maximum diameter position not obtaining the community of configuration messages and home cell;
Described ratio detecting unit three, specifically for, detect the ratio three obtained according to each community not obtaining configuration messages and whether be greater than threshold value three, and be less than threshold value four, if so, then select the community not obtaining configuration messages accordingly as reservation community.
Relative to prior art, beneficial effect of the present invention is: all carry out code-division activated detection to the code channel of the community and the community that do not obtain configuration messages that obtain configuration messages, with the power of each code channel with generate in advance all make odds ratio comparatively lower than the power corresponding with each code channel affiliated subdistrict of the same contrast sequence of predetermined threshold value one with the cross correlation value of all channel codes, the accuracy of code-division activated detection can be improved like this, detect likely occupied code channel, for follow-up joint-detection provides code channel information more fully, the reliability of joint-detection can be improved.
Except above beneficial effect, the present invention also has beneficial effect: for all co-frequency cells not obtaining configuration messages arrange specified requirements, cast out the community that do not obtain configuration messages strong especially or weak especially to the interference of home cell, follow-up algorithm operation quantity can not only be simplified like this, the performance of joint-detection can also be strengthened.
Accompanying drawing explanation
Fig. 1 is the flow chart of steps of the specific embodiment one of the inventive method;
Fig. 2 is the frame structure of the burst received in the specific embodiment one of the inventive method;
Fig. 3 is the flow chart of steps of in the specific embodiment one of the inventive method, each code channel of all activated window obtained in the community of configuration messages being carried out to code-division activated detection;
Fig. 4 is the flow chart of steps of in the specific embodiment one of the inventive method, each code channel of all activated window do not obtained in the community of configuration messages being carried out to code-division activated detection;
Fig. 5 is the flow chart selecting to retain community in the specific embodiment two of the inventive method;
Fig. 6 is the block diagram of the specific embodiment one of apparatus of the present invention;
Fig. 7 is the concrete block diagram of processing unit in the specific embodiment one of apparatus of the present invention;
Fig. 8 is the concrete block diagram of code-division activated detection unit in the specific embodiment one of apparatus of the present invention
Fig. 9 is the concrete block diagram selecting to retain cell unit in the specific embodiment two of apparatus of the present invention.
Embodiment
The present invention proposes a kind of code channel activating detection method and device of TD-SCDMA system common frequency multi-cell, can detect the code channel likely taken, and improves the accuracy of code-division activated detection.
In multiple communities of same frequency range, along with the increase of the number of users communicated simultaneously, multiple access interference is topmost interference.Joint-detection effectively can eliminate multi-access inference, suppresses near-far interference, increases substantially power system capacity and performance.In common frequency multi-cell, the corresponding multiple code channel of each channel estimating window possibility, therefore activate at window on the basis detected and need code-division activated detection, namely which code channel is detected occupied, the configuration information of occupied code channel is used for follow-up joint-detection, detects that the code channel of all CUs comprising interference user can improve combined detection performance.
The main thought of method of the present invention first supposes that the code channel of all activated window all exists, by the related operation of the channel code of the data sequence after descrambling and all code channels, obtain the performance number of all code channels, the related operation of the data sequence after all having the contrast sequence of lower cross correlation value and descrambling by generate in advance with the cross correlation value of all channel codes obtains the power of this contrast sequence, ask the ratio of the former power and the power of the latter, make comparisons with thresholding, person then determines that this code channel is activated code channel to be greater than thresholding again.
The method that the present invention proposes be applicable to up link by base station as receiving terminal and downlink terminals as receiving terminal, each specific embodiment of the present invention, for up link, each user arrives base station receiving terminal through different wireless channels, and data transmit in bursts.
Shown in Figure 1, the specific embodiment one realizing the inventive method comprises the following steps:
Step 101: be midamble Sequence and data division by all burst segmentation in a time slot receiving; The frame structure of TD-SCDMA system as shown in Figure 2, wherein B, Tfr, Tbu, K represent the duration of a frequency slot band, a TD-SCDMA frame, the duration of a burst respectively, the number of users in same frequency and time slot.In TD-SCDMA, burst to be respectively the data block of 352chip by two length, and length is that the midamble code of 144chip and a long protection interval for 16chip form (1chip=781ns).
Step 102: to select in each co-frequency cell corresponding with midamble Sequence all has obtained the community of configuration messages and has met the community not obtaining configuration messages of specified requirements as retaining community;
Because the channel configuration information of community is broadcasted on the common channels, in all co-frequency cells obtained according to midamble part, include the community obtaining configuration messages and the community not obtaining configuration messages, the community obtaining configuration messages is all remained, and for not obtaining the community of configuration messages, if the signal power do not obtained in the community of configuration messages had is stronger than the signal power in home cell, so can produce interference to the signal of home cell, the channel configuration information of the community these not being obtained configuration messages is needed also to use in follow-up joint-detection, improve the demodulation effect of joint-detection.If but the signal do not obtained in the community of configuration messages is strong especially or weak especially, what so this interference was strong especially or weak especially the demodulation result of code channel information to follow-up joint-detection do not obtained in the community of configuration messages does not have improvement result yet, so, the strong especially or weak especially community not obtaining configuration messages is disturbed just to there is no need to participate in follow-up joint-detection, so when code-division activated detection, do not consider that this part does not obtain the community of configuration messages, but select the community not obtaining configuration messages meeting specified requirements.Specified requirements is set and can has a variety of method, as long as meet the demodulation effect that the channel configuration information not obtaining the community of configuration messages for follow-up joint-detection chosen can improve joint-detection.
Step 103: point window process and window activation detection are carried out to the channel impulse response of each reservation community, obtains all activated window of each reservation community;
Wherein, the channel impulse response of each reservation community is that the midamble Sequence utilizing step 101 to obtain does channel estimating and obtains.When happening suddenly and transmitting in wireless channel, the decline of signal amplitude and the distortion of signal phase can occur, this change is a random process, and channel estimating is in the estimation of receiving terminal realization to this channel variation.According in 3GPP standard for the definition of midamble sequence, adopt different midamble sequence base codes between different districts.By carrying out to the midamble Sequence through channel transmission received the channel impulse response that de-convolution operation just can obtain the co-frequency cell corresponding with each midamble sequence base code.By midamble Configuration Type, channel impulse response is divided into several windows, each window comprises the channel impulse response tap of some.For each window, judge whether window activates by its tap power.
Step 104: utilize data division to obtain the descrambling data sequence of each reservation community, calculates the power corresponding with each reservation community of this contrast sequence:
By the unique corresponding scrambler in each reservation community and data division conjugate multiplication, the descrambling data sequence of corresponding reservation community can be obtained; Despreading is done, the power corresponding with corresponding reservation community that can obtain this contrast sequence by the descrambling data sequence of this contrast sequence and each reservation community;
Step 105: generation one and the cross correlation value of all channel codes all have the contrast sequence of lower cross correlation in advance, suppose that all code channels in all activated window of each reservation community all exist, carry out the code-division activated detection shown in Fig. 3 or Fig. 4.
Wherein, about contrast sequence, can arrange threshold value one, if the cross correlation value of the contrast sequence generated and all channel codes is all lower than threshold value one, so this contrast sequence just meets the demands;
Code-division activated detection concrete steps are as follows:
As shown in Figure 3, each code channel in each each theactivewindow obtained in the community of configuration messages is handled as follows, comprises step:
Step 301: select the channel code that this code channel is configured in configuration messages;
Step 302: the descrambling data sequence of the channel code be configured with this code channel and the community belonging to this code channel does despreading, obtains the power of this code channel;
Step 303: the ratio one obtaining the power of this code channel power corresponding with the community belonging to this code channel with this contrast sequence;
Step 304: detect the ratio one obtained according to this code channel and whether be greater than threshold value two, if so, then determines that this code channel is activated code channel;
This threshold value two can obtain according to the correlation of this contrast sequence and all channel codes;
As shown in Figure 4, each code channel in each each theactivewindow do not obtained in the community of configuration messages is handled as follows, comprises step:
Step 401: the channel code selecting a non-selected mistake in all channel codes;
Step 402: the descrambling data sequence of the channel code selected by step 401 and the community belonging to this code channel does despreading, obtains the power of this code channel corresponding;
Step 403: the ratio two obtaining the power of this code channel power corresponding with the community belonging to this code channel with this contrast sequence;
Step 404: detect the ratio two obtained according to this code channel and whether be greater than threshold value two, if so, then determines that this code channel is activated code channel; If not, then step 401 is returned.
Owing to not obtaining the configuration information of this code channel, also do not know that whether this code channel is occupied at present, namely whether state of activation is in, but suppose that this code channel exists, namely suppose that this code channel is in state of activation, so think that this code channel has been preconfigured a unique channel code, but which in all channel codes uncertain be, so need to carry out step 401-404 one by one to all channel codes, until when detecting that the ratio two obtained according to this code channel is greater than threshold value two, just can determine that this code channel is in state of activation, and the channel code being now used for calculating this code channel power is exactly the in fact real channel code that is configured of this code channel, the numerical value of the spreading factor that the theactivewindow belonging to this code channel is configured now also can be known according to this channel code.If after all channel codes are all traveled through one time, do not detect that the ratio two obtained according to this code channel is greater than threshold value two, so illustrate that this code channel is not configured any channel code, namely this code channel does not have occupied, is not in state of activation yet.
For the community not obtaining configuration messages, base station or the terminal processing method when upstream or downstream carry out code-division activated detection is similar.But due to the orthogonal code with different spreading factor may be used between up each user, so the quantity of the channel code of code channel will more than descending, the channel code of the different spreading factors that the detection therefore taking situation for the code channel of not catching configuration information needs traversal likely to use.
The method that the present invention proposes to utilize the power of the power of each code channel of each theactivewindow and same contrast sequence to compare is to carry out code-division activated detection, can effectively detect the code channel likely taken like this, improve the reliability of joint-detection.This contrast sequences Design can have multiple choices, such as pseudo random sequence or other forms of sequence, meets and all has lower cross correlation value with all frequency expansion sequences.
In specific embodiments of the invention two, in the step 103 of embodiment one, compare by the ratio of the power that the maximum diameter position of the community not obtaining configuration messages the is corresponding power corresponding with the maximum diameter position of home cell and a threshold value, be greater than threshold value and then retain.
As shown in Figure 5, specifically step is comprised:
Step 501: to obtain in co-frequency cell each does not obtain power corresponding to the maximum diameter position of power corresponding to the maximum diameter position of the community of configuration messages and home cell, power corresponding to the maximum diameter position of community be exactly tap amplitude value corresponding to the maximum diameter position of the channel impulse response small area of community square.
Step 502: the ratio three calculating power corresponding to the maximum diameter position of power corresponding to each maximum diameter position not obtaining the community of configuration messages and home cell;
Step 503: detect the ratio three obtained according to each community not obtaining configuration messages and whether be greater than threshold value three, if so, then selects the community not obtaining configuration messages accordingly as reservation community.
In order to support the inventive method embodiment one, the present invention also proposes a kind of device realizing the method, as shown in Figure 6, realizes apparatus of the present invention embodiment one and comprises:
Contrast sequence generating unit 601, for, generation one in advance and the cross correlation value of all channel codes are all lower than the contrast sequence of threshold value one;
Data partitioning unit 602, for, be training sequence part and data division by the burst segmentation received;
Select to retain cell unit 603, for, the community that to select in each co-frequency cell corresponding with training sequence part all has obtained configuration messages with meet the community not obtaining configuration messages of specified requirements as retaining community;
Processing unit 604, for, obtain all activated window of each reservation community; Utilize data division to obtain the descrambling data sequence of each reservation community, calculate the power corresponding with each reservation community of this contrast sequence;
Code-division activated detection unit 605, for, suppose that all code channels in all activated window of each reservation community all exist,
Each code channel in each each theactivewindow obtained in the community of configuration messages: utilize the configuration messages obtained to calculate the power of this code channel, and calculate the ratio one of the power of this code channel and the power of the corresponding with this code channel affiliated subdistrict of this contrast sequence, whether detection ratio one is greater than threshold value two, if so, then determine that corresponding code channel is activated code channel;
Each code channel in each each theactivewindow do not obtained in the community of configuration messages: utilize all channel codes to calculate the power of this code channel one by one, and calculate the ratio of the power of this code channel and the power of the corresponding with this code channel affiliated subdistrict of this contrast sequence, whether detection ratio is greater than threshold value two, if so, then determine that corresponding code channel is activated code channel.
Wherein, the channel impulse response of each reservation community is that the midamble Sequence utilizing step 101 to obtain does channel estimating and obtains.Then device embodiment one of the present invention also comprises channel estimating unit 606, for, utilize training sequence part to do channel estimating, the channel impulse response that the original channel obtaining each co-frequency cell corresponding with training sequence part is estimated;
Shown in Figure 7, in the device of device embodiment one of the present invention, processing unit comprises windowing processing unit 701, Descrambling unit 702 and contrast sequence power computing unit 703,
Windowing processing unit 701, specifically for, point window process and window activation detection are carried out to each channel impulse response having obtained the community of configuration messages, obtains each all activated window having obtained the community of configuration messages;
Descrambling unit 702, specifically for, be multiplied by with the unique corresponding scrambler in each reservation community the descrambling data sequence that data division obtains each reservation community;
Contrast sequence power computing unit 703, specifically for, do despreading operations with the descrambling data sequence of each reservation community respectively by this contrast sequence, calculate the power corresponding with each reservation community of this contrast sequence;
Shown in Figure 8, in the device of device embodiment one of the present invention, code-division activated detection unit 605 comprises direct code channel activating detecting unit 801 and traversal code-division activated detection unit 802,
Direct code channel activating detecting unit 801 processes each code channel in each each theactivewindow obtained in the community of configuration messages, comprise selective channel code unit 1, power calculation unit 1, ratio calculation unit 1 and ratio detecting unit 1
Selective channel code unit 1, specifically for, in configuration messages, select the channel code that this code channel is configured;
Power calculation unit 1, specifically for, the descrambling data sequence of the channel code be configured with this code channel and the community belonging to this code channel does despreading, obtains the power of this code channel;
Ratio calculation unit 1, specifically for, obtain the ratio one of the power of this code channel and the power of the corresponding with the community belonging to this code channel of this contrast sequence;
Ratio detecting unit 1, specifically for, detect the ratio one obtained according to this code channel and whether be greater than threshold value two, if so, then determine that this code channel is activated code channel;
Traversal code-division activated detection unit 802 processes each code channel in each each theactivewindow do not obtained in the community of configuration messages, comprise selective channel code unit 2 8021, power calculation unit 2 8022, ratio calculation unit 2 8023 and ratio detecting unit 2 8024
Selective channel code unit 2 8021, specifically for, in all channel codes, select the channel code of a non-selected mistake;
Power calculation unit 2 8022, specifically for, do despreading by the descrambling data sequence of the community belonging to the channel code selected by selective channel code unit two and this code channel, obtain the power of this code channel corresponding;
Ratio calculation unit 2 8023, specifically for, obtain the ratio two of the power of this code channel power corresponding with the community belonging to this code channel with this contrast sequence;
Ratio detecting unit 2 8024, specifically for, detect the ratio two obtained according to this code channel and whether be greater than threshold value, if so, then determine that this code channel is activated code channel; If not, then selective channel code unit two is again activated.
In order to support the inventive method embodiment one, in the specific embodiment two of apparatus of the present invention, on the basis of the specific embodiment one of apparatus of the present invention, selecting to retain cell unit 603 and comprise selection reservation cell unit 1 and select to retain cell unit 2 902,
Select to retain cell unit 1, specifically for, to select to retain in each co-frequency cell corresponding with training sequence part, community all has obtained the community of configuration messages as retaining community;
Select to retain cell unit 2 902 and comprise power calculation unit 3 903, ratio calculation unit 3 904 and ratio detecting unit 3 905,
Power calculation unit 3 903, specifically for, to obtain in co-frequency cell all does not obtain power corresponding to the maximum diameter position of power corresponding to the maximum diameter position of the community of configuration messages and home cell;
Ratio calculation unit 3 904, specifically for, calculate the ratio three of power corresponding to the maximum diameter position of power corresponding to each maximum diameter position not obtaining the community of configuration messages and home cell;
Ratio detecting unit 3 905, specifically for, detect the ratio three obtained according to each community not obtaining configuration messages and whether be greater than threshold value three, and be less than threshold value four, if so, then select the community not obtaining configuration messages accordingly as reservation community.
Below be only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from principle of the present invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (11)
1. a code channel activating detection method for TD-SCDMA system common frequency multi-cell, is characterized in that, generation one in advance and the cross correlation value of all channel codes are all lower than the contrast sequence of threshold value one, and the method comprises:
Steps A: be training sequence part and data division by the burst segmentation received;
Step B: to select in each co-frequency cell corresponding with described training sequence part all has obtained the community of configuration messages and has met the community not obtaining configuration messages of specified requirements as retaining community;
Step C: all activated window obtaining each described reservation community;
Step D: utilize described data division to obtain the descrambling data sequence of each described reservation community, calculate the power corresponding with each described reservation community of this contrast sequence;
Step e: suppose that all code channels in all activated window of each described reservation community all exist,
Each code channel in each theactivewindow obtained described in each in the community of configuration messages is handled as follows: utilize the described configuration messages obtained to calculate the power of this code channel, and calculate the ratio one of the power of this code channel and the power of the corresponding with this code channel affiliated subdistrict of this contrast sequence, detect the ratio one obtained according to this code channel and whether be greater than threshold value two, if so, then determine that this code channel is activated code channel; Described threshold value two obtains according to the correlation of this contrast sequence and all channel codes;
Each code channel in each theactivewindow do not obtained described in each in the community of configuration messages is handled as follows: utilize all channel codes to calculate the power of this code channel one by one, and calculate the ratio two of the power of this code channel and the power of the corresponding with this code channel affiliated subdistrict of this contrast sequence, detect the ratio two obtained according to this code channel and whether be greater than threshold value two, if so, then determine that this code channel is activated code channel.
2. method according to claim 1, is characterized in that, also comprises after described steps A before step B:
Step F: utilize described training sequence part to do channel estimating, the channel impulse response that the original channel obtaining each co-frequency cell corresponding with described training sequence part is estimated;
Described step C is specially: carry out point window process and window activation detection to the channel impulse response of each described reservation community, obtain all activated window of described reservation community.
3. method according to claim 1, is characterized in that, described step e specifically comprises:
Suppose that all code channels in all activated window of each described reservation community all exist,
Each code channel in each theactivewindow obtained described in each in the community of configuration messages is handled as follows:
Step e 11: select the channel code that this code channel is configured in described configuration messages;
Step e 12: the descrambling data sequence of the channel code be configured with this code channel described and the community belonging to this code channel does despreading, obtains the power of this code channel;
Step e 13: the ratio one obtaining the power of this code channel power corresponding with the community belonging to this code channel with this contrast sequence;
Step e 14: detect the ratio one obtained according to this code channel and whether be greater than threshold value two, if so, then determines that this code channel is activated code channel;
Each code channel for each theactivewindow do not obtained in the community of configuration messages described in each is handled as follows:
Step e 21: the channel code selecting a non-selected mistake in all channel codes;
Step e 22: the descrambling data sequence of the channel code selected by step e 21 and the community belonging to this code channel does despreading, obtains the power of this code channel corresponding;
Step e 23: the ratio two obtaining the power of this code channel power corresponding with the community belonging to this code channel with this contrast sequence;
Step e 24: detect the ratio two obtained according to this code channel and whether be greater than threshold value two, if so, then determines that this code channel is activated code channel; If not, then step e 21 is returned.
4. method according to claim 3, it is characterized in that, in described step e 24 if, then determine that corresponding code channel is for also comprising after activated code channel: determine that the corresponding channel code selected in described step e 21 is the channel code that this code channel is configured, and determine the numerical value of the spreading factor that the theactivewindow belonging to this code channel is configured according to this channel code.
5. method according to claim 1, is characterized in that, described step B specifically comprises:
Step B1: to select in each co-frequency cell corresponding with described training sequence part all has obtained the community of configuration messages as retaining community;
Step B2: select the community not obtaining configuration messages meeting specified requirements in each co-frequency cell corresponding with described training sequence part as retaining community;
Described specified requirements is that the ratio of the power that power corresponding to the maximum diameter position of the community not obtaining configuration messages is corresponding with the maximum diameter position of home cell is greater than thresholding three;
Described step B2 specifically comprises:
Step B21: to obtain in described co-frequency cell each does not obtain power corresponding to the maximum diameter position of power corresponding to the maximum diameter position of the community of configuration messages and home cell;
Step B22: the ratio three calculating power corresponding to the maximum diameter position of power corresponding to each maximum diameter position not obtaining the community of configuration messages and home cell;
Step B23: detect the ratio three obtained according to each community not obtaining configuration messages and whether be greater than threshold value three, if so, then selects the community not obtaining configuration messages accordingly as reservation community.
6. method according to claim 5, is characterized in that,
Described specified requirements is that the ratio of the power that power corresponding to the maximum diameter position of the community not obtaining configuration messages is corresponding with the maximum diameter position of home cell is greater than thresholding three, and is less than thresholding four;
Detect described ratio three described in described step B23 whether to be greater than threshold value three and to comprise further: detect described ratio three and whether be less than threshold value four.
7. method according to claim 1, is characterized in that,
Described contrast sequence is all lower than the pseudo random sequence of threshold value one with the cross correlation value of all channel codes.
8. method according to claim 1, is characterized in that, this method is applicable to upcoming base station as receiving terminal, or downstream station is as receiving terminal.
9. a code-division activated detection device for TD-SCDMA system common frequency multi-cell, is characterized in that, comprising:
Contrast sequence generating unit, for, generation one in advance and the cross correlation value of all channel codes are all lower than the contrast sequence of threshold value one;
Data partitioning unit, for, be training sequence part and data division by the burst segmentation received;
Select to retain cell unit, for, the community that to select in each co-frequency cell corresponding with described training sequence part all has obtained configuration messages with meet the community not obtaining configuration messages of specified requirements as retaining community;
Processing unit, for, obtain all activated window of each described reservation community; Utilize described data division to obtain the descrambling data sequence of each described reservation community, calculate the power corresponding with each described reservation community of this contrast sequence;
Code-division activated detection unit, for, suppose that all code channels in all activated window of each described reservation community all exist,
Each code channel in each theactivewindow obtained described in each in the community of configuration messages: utilize the described configuration messages obtained to calculate the power of this code channel, and calculate the ratio one of the power of this code channel and the power of the corresponding with this code channel affiliated subdistrict of this contrast sequence, detect described ratio one and whether be greater than threshold value two, if so, then determine that corresponding code channel is activated code channel;
Each code channel in each theactivewindow do not obtained described in each in the community of configuration messages: utilize all channel codes to calculate the power of this code channel one by one, and calculate the ratio of the power of this code channel and the power of the corresponding with this code channel affiliated subdistrict of this contrast sequence, detect described ratio and whether be greater than threshold value two, if so, then determine that corresponding code channel is activated code channel.
10. device according to claim 9, is characterized in that,
Described device also comprises channel estimating unit, for, utilize described training sequence part to do channel estimating, the channel impulse response that the original channel obtaining each co-frequency cell corresponding with described training sequence part is estimated;
Described processing unit comprises windowing processing unit, Descrambling unit and contrast sequence power computing unit,
Described windowing processing unit, specifically for, point window process and window are carried out to the channel impulse response having obtained the community of configuration messages described in each and activate and detect, obtain each described in obtained all activated window of the community of configuration messages;
Described Descrambling unit, specifically for, be multiplied by with the unique corresponding scrambler in each described reservation community the descrambling data sequence that described data division obtains each described reservation community;
Described contrast sequence power computing unit, specifically for, do despreading operations with the descrambling data sequence of each described reservation community respectively by this contrast sequence, calculate the power corresponding with each described reservation community of this contrast sequence;
Described code-division activated detection unit comprises direct code channel activating detecting unit and traversal code-division activated detection unit,
Described direct code channel activating detecting unit processes each code channel in each theactivewindow obtained described in each in the community of configuration messages, comprise selective channel code unit one, power calculation unit one, ratio calculation unit one and ratio detecting unit one
Described selective channel code unit one, specifically for, in described configuration messages, select the channel code that this code channel is configured;
Described power calculation unit one, specifically for, the descrambling data sequence of the channel code be configured with this code channel described and the community belonging to this code channel does despreading, obtains the power of this code channel;
Described ratio calculation unit one, specifically for, obtain the ratio one of the power of this code channel and the power of the corresponding with the community belonging to this code channel of this contrast sequence;
Described ratio detecting unit one, specifically for, detect the ratio one obtained according to this code channel and whether be greater than threshold value two, if so, then determine that this code channel is activated code channel;
Described traversal code-division activated detection unit processes each code channel in each theactivewindow do not obtained described in each in the community of configuration messages, comprise selective channel code unit two, power calculation unit two, ratio calculation unit two and ratio detecting unit two
Described selective channel code unit two, specifically for, in all channel codes, select the channel code of a non-selected mistake;
Described power calculation unit two, specifically for, do despreading by the descrambling data sequence of the community belonging to the channel code selected by described selective channel code unit two and this code channel, obtain the power of this code channel corresponding;
Described ratio calculation unit two, specifically for, obtain the ratio two of the power of this code channel power corresponding with the community belonging to this code channel with this contrast sequence;
Described ratio detecting unit two, specifically for, detect the ratio two obtained according to this code channel and whether be greater than threshold value two, if so, then determine that this code channel is activated code channel; If not, then selective channel code unit two is again activated.
11. devices according to claim 9, is characterized in that,
Described selection retains cell unit and comprises selection reservation cell unit one and select to retain cell unit two,
Described selection retains cell unit one, specifically for, to select in each co-frequency cell corresponding with described training sequence part all has obtained the community of configuration messages as retaining community;
Described selection retains cell unit two and comprises power calculation unit three, ratio calculation unit three and ratio detecting unit three,
Described power calculation unit three, specifically for, to obtain in described co-frequency cell all does not obtain power corresponding to the maximum diameter position of power corresponding to the maximum diameter position of the community of configuration messages and home cell;
Described ratio calculation unit three, specifically for, calculate the ratio three of power corresponding to the maximum diameter position of power corresponding to each maximum diameter position not obtaining the community of configuration messages and home cell;
Described ratio detecting unit three, specifically for, detect the ratio three obtained according to each community not obtaining configuration messages and whether be greater than threshold value three, and be less than threshold value four, if so, then select the community not obtaining configuration messages accordingly as reservation community.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210212652.2A CN103516390B (en) | 2012-06-21 | 2012-06-21 | Code channel activation detection method for same-frequency multiple cells of TD-SCDMA system and device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210212652.2A CN103516390B (en) | 2012-06-21 | 2012-06-21 | Code channel activation detection method for same-frequency multiple cells of TD-SCDMA system and device thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103516390A CN103516390A (en) | 2014-01-15 |
| CN103516390B true CN103516390B (en) | 2015-07-15 |
Family
ID=49898516
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210212652.2A Active CN103516390B (en) | 2012-06-21 | 2012-06-21 | Code channel activation detection method for same-frequency multiple cells of TD-SCDMA system and device thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103516390B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1474530A (en) * | 2003-05-28 | 2004-02-11 | 大唐移动通信设备有限公司 | Method and device for detecting multi-user's code path activation in radio communication system |
| CN101335540A (en) * | 2008-08-04 | 2008-12-31 | 北京天碁科技有限公司 | Physical code channel activating detection method and apparatus based on channel estimating postprocessing |
| CN102547813A (en) * | 2011-12-16 | 2012-07-04 | 华为技术有限公司 | Code channel detection method and related device and communication system |
| WO2012146140A1 (en) * | 2011-04-28 | 2012-11-01 | 意法·爱立信半导体（北京）有限公司 | Code channel activation method and device, computer program and storage medium |
-
2012
- 2012-06-21 CN CN201210212652.2A patent/CN103516390B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1474530A (en) * | 2003-05-28 | 2004-02-11 | 大唐移动通信设备有限公司 | Method and device for detecting multi-user's code path activation in radio communication system |
| CN101335540A (en) * | 2008-08-04 | 2008-12-31 | 北京天碁科技有限公司 | Physical code channel activating detection method and apparatus based on channel estimating postprocessing |
| WO2012146140A1 (en) * | 2011-04-28 | 2012-11-01 | 意法·爱立信半导体（北京）有限公司 | Code channel activation method and device, computer program and storage medium |
| CN102547813A (en) * | 2011-12-16 | 2012-07-04 | 华为技术有限公司 | Code channel detection method and related device and communication system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103516390A (en) | 2014-01-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA3041397C (en) | Optimized combination of preamble and data fields for sensor networks having low electricity consumption on the basis of the telegram splitting method | |
| CN101103554B (en) | Method and apparatus for estimating channelization codes in a wireless transmit/receive unit | |
| EP2449851B1 (en) | Scheduling different types of receivers in a radio base station | |
| CN101295999A (en) | Detection method for accidental precursor access | |
| JP5624847B2 (en) | Signal detection apparatus and signal detection method | |
| WO2013104281A1 (en) | Method and system for spectrum sensing | |
| CN106941384B (en) | Frequency sweeping method and frequency sweep instrument for Internet of things | |
| CN104467992B (en) | The detection method of LTE system PUCCH channel DTX and device | |
| CN102869027A (en) | Method and device for detecting physical random access channel (PRACH) of multi-antenna base station | |
| US20120192020A1 (en) | Detecting and Eliminating Potential Performance Degradation Caused by Neighboring Identical Scrambling Codes | |
| EP3258609B1 (en) | Clear channel assessment | |
| CN100409587C (en) | Method and apparatus for detecting active downlink channelization codes in a TD-CDMA mobile communication system | |
| CN101072046A (en) | Multi-path selecting method and receiver | |
| CN103516390B (en) | Code channel activation detection method for same-frequency multiple cells of TD-SCDMA system and device thereof | |
| US20120155405A1 (en) | Apparatus and method for receiving a random access channel for a wireless communication system | |
| US8923376B2 (en) | Apparatus and method for estimating noise and interference power in communication system | |
| CN103229422B (en) | Method and device for demodulating signals of physical random access channel | |
| CN100568760C (en) | Downlink channel estimating processing method under the multi-antenna multi-user TDD mode | |
| CN105578483A (en) | Energy efficient cooperative spectrum sensing method based on wireless sensor network | |
| CN102547813A (en) | Code channel detection method and related device and communication system | |
| CN111935051B (en) | Method, device, terminal and storage medium for detecting sequence number of synchronous signal block | |
| CN105099500B (en) | The detection method and device of inter-frequency interference cell spreading factor | |
| CN103825627B (en) | A kind of associated detecting method and base station | |
| CN103716100B (en) | A kind of DTMB signal frequency spectrum sensing method based on linear combining | |
| US20040151233A1 (en) | Apparatus and method for allocating search resource of base station modem |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |