CN1474529A - Radio terminal receiver and radio signal receiving treating method - Google Patents
Radio terminal receiver and radio signal receiving treating method Download PDFInfo
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- CN1474529A CN1474529A CNA021260044A CN02126004A CN1474529A CN 1474529 A CN1474529 A CN 1474529A CN A021260044 A CNA021260044 A CN A021260044A CN 02126004 A CN02126004 A CN 02126004A CN 1474529 A CN1474529 A CN 1474529A
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Abstract
This invention relates to a radio terminal receiver and a radio signal receive-process method in a spread spectrum CDMA mobile cell communication system. A radio terminal receiver includes a hunter unit, a path receiving unit and multipath merge unit and a receiver control unit and the path receiving unit includes multiple freely matched dispreading demodulating units, track unit and a channel estimation unit. A process method includes a. the hunter is synchronized to the base station signals to hunter multipath signals, b. the control unit assigns dispreading, demodulating and path receive units to the physical channel, c. the path receive unit processes the physical channel and outputs data to multipath merge unit merging the data and outputting the merged data.
Description
Technical field
The present invention relates to moving communicating field, relate in particular to radio base band digital receiver and a kind of wireless signal receiving handling method in spectrum CDMA (code division multiple access) the mobile cellular communication system.
Technical background
In spread spectrum communication cdma wireless system, the typical case has base station and terminal on the equipment that the wireless signal transmitting-receiving is handled; Send wireless signal from the base station and receive the processing wireless signal, be defined as downlink processing, send wireless signal from terminal and receive the processing wireless signal to the base station, be defined as up processing to terminal; Band spectrum modulation, scrambling are carried out to the data that send in the base station, send with wireless signal then by radio frequency processing; Terminal receives the wireless signal of base station, by radio frequency frequency conversion and demodulation process, the radio frequency signal that receives is become base-band analog signal, then by the AD sample circuit, base-band analog signal is transformed into baseband digital signal, then the digital signal after the sampling is delivered to the baseband processing unit of terminal, carried out the despread-and-demodulation of digital baseband data, recover the preceding data of base station band spectrum modulation.
What the cdma spread spectrum communication system was different with the GSM cell mobile communication systems is, cdma communication system is that the pseudo noise code with quadrature identifies different users and channel, do correlation reception at receiving terminal with corresponding pseudo noise code, characteristics according to the autocorrelation and the cross correlation of pseudo noise code can extract the channel data of issuing this user.In cdma communication system, characteristics according to radio signal propagation, can adopt time diversity technique to come wireless signal is received, on physical structure be exactly adopt the RAKE receiver structure never to extract to come with the path and can extract respectively from different propagation paths and aliasing signal mutually, by separate with the different paths of merging on signal, overcome the influence of wireless fading channel, thereby to obtain maximum receiving gain, this is that cdma system is compared the unified bigger advantage of other communication system.
Fig. 1 is a wireless signal RAKE receiver typical structure in a kind of cdma communication system commonly used:
The function declaration of each module:
Searcher module: mainly by the base station spread-spectrum signal is searched for, acquisition is synchronous with base station signal, searches out the multipath signal that never comes with the path simultaneously for searcher, for the back demodulating unit provides the synchronous of each footpath.
Single footpath receiver module: have many footpath receiving elements to come that each is searched for out separable multipath signal in the general RAKE receiver and carry out despread-and-demodulation.Comprise despread unit, demodulating unit, tracking cell, channel estimating unit and pseudo-code (claiming pseudo noise code again) generating unit in each footpath receiving element; Wherein the pseudo-code generating unit mainly in the pseudo noise code of the local generation of receiver with the same sequence of transmitter, carries out multiple multiplication by the pseudo noise code of this locality generation and the spread-spectrum signal of input, can reach the effect of despreading and descrambling.Despread unit mainly is to finish spread-spectrum signal of importing and the local pseudo-code that produces are carried out multiple multiplication, and spreading code in the signal and scrambler are removed, and recovers the preceding data of spectrum-spreading and scrambling; Tracking cell mainly be to the multipath synchronizing signal that searches out carry out more accurate synchronously, according to the data of Common Pilot Channel in the received signal,, approach actual frame synchronization according to track algorithm; Channel estimating unit mainly is to come the signal of despread-and-demodulation output is carried out just spoiling of phase place and amplitude according to the result to radio channel estimation, improves the performance of receiver.
Multipath merges module: because never with the signal of path arrival, its initial data is the same, merge the accuracy of raising output signal so by multipath merging module the result of each footpath receiving element despread-and-demodulation output is carried out data.
In the system of IS-95, in the receiver of portable terminal, general footpath receiving element has 3; In the WCDMA system, portable terminal generally can be selected 6 footpath receiving elements; In a receiver, it is by the desired performance decision of algorithm that the footpath allocation units are got several on earth.
In the RAKE receiver shown in Figure 1, can only carry out demodulate reception, when a plurality of channel of needs demodulation simultaneously, need same many covers receiver just can meet the demands, need very huge demodulation resource a channel.Generally on downlink processing,, may need the physical channel difference that receives simultaneously along with the difference of communication system; If with WCDMA portable terminal receiver 3 down channels of demodulate reception simultaneously, if 6 footpath receiving elements are arranged according to each channel, then need 18 footpath receiving elements, this demodulation resource to portable terminal requires very big, and the complexity of realization is very big.
In addition, in traditional RAKE receiver, physical channel to each reception distributes fixing footpath receiving element to carry out the signal reception, because the quality of wireless channel is a change at random, when the mass ratio of wireless channel preferably under the situation, if after merging by each footpath data with fewer footpath receiving element, also can reach the demodulation performance index request, then according to the method for fixing footpath distribution, there is certain wasting of resources in the footpath receiving element of overabsorption; If fixed allocation can't satisfy performance requirement for each data after directly merging of footpath receiving element of certain physics channel, when also having the resource of footpath receiving element of other free time in the simultaneity factor, this distribution fixed number footpath receiving element does not just well utilize other passable footpath receiving elements further to improve demodulation performance to each structure of receiver that needs the physical channel of demodulation.
Summary of the invention
Purpose of the present invention is exactly by adjusting the structure of traditional receiver, design a kind of rational in infrastructure, powerful wireless terminal receiver and use the wireless signal receiving handling method of this receiver, in the channel ratio of needs demodulation simultaneously more for a long time, can effectively reduce the system complex degree, save resource; Simultaneously after the resource situation of having determined receiving system, to each demodulation resource that needs the channel of demodulation, guarantee that the demodulation resource of whole receiver can the most effective utilization by dynamic assignment, improve the demodulation performance of physical channel.
The object of the present invention is achieved like this:
A kind of wireless terminal receiver, comprise searcher unit, footpath receiving element and multipath merge cells, it is characterized in that also comprising the receiver control unit, described footpath receiving element comprises a plurality of despread-and-demodulation unit that can freely dispose, and each footpath receiving element also comprises tracking cell and the channel estimating unit that is complementary with it;
Base station spread-spectrum signal and multipath signal search and export to the footpath receiving element by described searcher unit, and the data before the footpath receiving element recovers spectrum-spreading and scrambling are exported to the multipath merge cells and merged output;
Described receiver control unit is used for distributing different footpath receiving elements into each physical channel;
Described tracking cell is used for the multipath that searches out is carried out further precise synchronization synchronously;
Described channel estimating unit is used for coming the signal of despread-and-demodulation output is carried out the rectification of phase place and amplitude according to the result to radio channel estimation.
Described despread-and-demodulation unit comprises: pseudo-code generating unit, despread unit, demodulating unit;
Described pseudo-code generating unit carries out multiple multiplication local the generation with the pseudo noise code of the same sequence of transmitter and the spread-spectrum signal of input of receiver;
Described despread unit is finished the spread-spectrum signal of input and the local pseudo noise code that produces is carried out multiple multiplication, remove spreading code and scrambler in the signal, recover the preceding data of spectrum-spreading and scrambling and export to demodulating unit, carry out demodulation, and export to the multipath merge cells.
Described receiver control unit comprises initialization unit, signaling interface processing unit, signaling parsing and status unit, channel configuration unit, searcher control unit, information search processing unit:
Described initialization control unit carries out initialization to all control registers and the status register of receiver, makes footpath receiving element and despreading demodulating unit be in release condition;
From protocol stack layers to the control command data of receiver after the signaling interface processing unit receives, resolve the migration control of advancing parsing and state with status unit by signaling, signaling is resolved with state processing unit and is started the searcher control unit according to analysis result, by searcher control unit configuration searcher parameter, the present base station signal is searched for output current base station frame synchronizing signal and multipath synchronizing signal;
Described channel configuration control unit receives the output signal of signaling parsing and status unit and searcher control unit, and according to the parameter of physical channel, configuration footpath receiving element and despreading demodulating unit are realized physical channel is received.
Described wireless terminal receiver, also comprise the channel quality assessment unit, data after described channel quality assessment unit merges each physical channel are carried out the quality evaluation behind the despread-and-demodulation, the result of assessment gives the control unit of receiver, the control unit of receiver comprises an information search processing unit, the quality evaluation data of evaluating receiving quality unit, and then carry out the resource dynamic adjustment, and export to the channel configuration unit, the channel configuration control unit is controlled redistributing of footpath receiving element and despreading demodulating unit according to adjusted channel resource allocation result.
In the receiving element of described footpath, each footpath receiving element comprises a channel estimating unit and tracking cell, described channel estimating unit is carried out the rectification of phase place and amplitude to each channel, and described tracking cell carries out further precise synchronization to the multipath synchronizing signal that searches out.
The number of the despread-and-demodulation unit in the receiving element of described footpath can be identical, also can be inequality.
A kind of wireless signal receiving handling method is characterized in that may further comprise the steps:
A, searcher unit obtain to follow the synchronous of base station signal, search out the multipath signal that never comes with the path;
B, the control unit characteristic of physical channel number, the physical channel of demodulation are as required given each physics letter
The road distributes different despread-and-demodulation unit and footpath receiving element;
C, footpath receiving element each physical channel to distributing carry out the processing of despread-and-demodulation unit, and output is every
Data after the multi path despreading demodulation of individual channel correspondence are given the multipath merge cells;
D, multipath merge cells merge the dateout of same physical channel Different Diameter receiving element, and be defeated
Go out the data after this physical channel multipath merges.
Described wireless signal receiving handling method also comprises:
Data after the channel quality assessment module merges each physical channel are carried out the quality evaluation behind the despread-and-demodulation, and the result of assessment gives the control unit of receiver;
In the control unit of receiver,, this channel is carried out the dynamically distribution of footpath receiving element in conjunction with the characteristics of physical channel and the demodulation quality assessment result of this channel.
Described wireless signal receiving handling method also comprises the channel estimating unit by the footpath receiving element, each channel is carried out the rectification of phase place and amplitude.
Described wireless signal receiving handling method also comprises the output signal of extracting the channel decoding unit as channel demodulation output quality evaluation criteria, thereby controls the configuration of dynamic adjustment channel resource.
According to the present invention, can come the different physical channel that receives simultaneously as much as possible with less physical resource, when the number one of the physical channel of needs demodulation simultaneously regularly, can realize with less physical channel demodulation resource.Can guarantee simultaneously the demodulate reception performance of physical channel, according to quality evaluation to the demodulated output signal of physical channel, when physical channel demodulate reception poor quality, in the multipath that can participate in the demodulation merging, improve the demodulation performance of this physical channel by more distribution footpath receiving element; And the present invention can make physical channel demodulation resource utilization maximization.According to the physical channel design of needs demodulate reception simultaneously the footpath processing unit number of portable terminal close the number of despread-and-demodulation, at the physical channel that has only a physical channel to need demodulate reception or need demodulate reception less than maximum demand simultaneously during the physical channel number of demodulate reception, can distribute available footpath as much as possible receiving element for the physical channel that needs demodulate reception, carry out despread-and-demodulation, multipath merging with effective multipath that can participate in merging, improve physical resource utilization same physical channel.
Description of drawings
Fig. 1 is the structure chart of RAKE receiver in the existing cdma system;
Fig. 2 is the structural representation of receiver of the present invention;
Fig. 3 is the footpath receiving element schematic diagram of receiver of the present invention;
Fig. 4 is the despread-and-demodulation cell schematics of receiver of the present invention;
Fig. 5 is the structural representation of receiver control unit of the present invention;
Fig. 6 is the flow chart of method of reseptance of the present invention.
Embodiment
Below in conjunction with Figure of description the specific embodiment of the present invention is described.
As shown in Figure 2, wireless terminal receiver of the present invention comprises searcher unit, footpath receiving element and multipath merge cells, wherein:
Searcher unit search base station spread-spectrum signal and multipath signal also input to the footpath receiving element;
The footpath receiving element receives the searcher input signal, recovers the preceding data of spectrum-spreading and scrambling, and data are inputed to the multipath merge cells;
The output result of each footpath receiving element is carried out phase place to the multipath merge cells and amplitude is corrected merging output.
More than be composition and the function comparatively approximate with traditional receiver, characteristic of the present invention is that the footpath receiving element of this wireless terminal receiver comprises a plurality of despread-and-demodulation unit that can freely dispose.
As shown in Figure 3, in the prior art, the quantity of footpath receiving element is consistent with the quantity of its despread-and-demodulation unit, promptly a footpath receiving element is equipped with a despread-and-demodulation unit, the present invention increases the quantity of despread-and-demodulation unit, make a footpath receiving element can be equipped with a plurality of despread-and-demodulations unit, such as can 8 footpath receiving elements and 16 despread-and-demodulation unit being set according to actual conditions, and, different footpath receiving elements, can be equipped with the despread-and-demodulation unit of varying number, dynamically adjust the behaviour in service of despread-and-demodulation unit according to the quality of reception of each channel.
Also comprise tracking cell and the channel estimating unit that is complementary with the footpath receiving element at wireless terminal receiver of the present invention, this tracking cell carries out further precise synchronization synchronously to the multipath that searches out, such as the synchronous precision of multipath is 1/2chip, can reach 1/4chip or 1/8chip by tracking cell, the solution of this problem is depended on signals sampling precision and algorithm, tracking cell is mainly according to the data of Common Pilot Channel in the received signal, according to track algorithm, approach actual frame synchronization.Channel estimating unit comes the signal of despread-and-demodulation output is carried out the rectification of phase place and amplitude according to the result to radio channel estimation.
As shown in Figure 4, this despread-and-demodulation unit comprises among the present invention: pseudo-code generating unit, despread unit, demodulating unit, wherein:
The pseudo-code generating unit carries out multiple multiplication in the pseudo noise code of the local generation of receiver with the same sequence of transmitter by the pseudo noise code of this locality generation and the spread-spectrum signal of input;
Despread unit is finished spread-spectrum signal of importing and the local pseudo-code that produces is carried out multiple multiplication, and spreading code in the signal and scrambler are removed, and recovers the preceding data of spectrum-spreading and scrambling;
Demodulating unit is handled the data of despread unit output, by the pseudo-code generating unit in the local pseudo noise code that produces with the same sequence of transmitter of receiver, carry out multiple multiplication by the pseudo noise code of this locality generation and the spread-spectrum signal of input, dateout is given the multipath merge cells, in the multipath merge cells, the multipath signal data from same channel are merged.
In traditional receiver, be tracking cell and the channel estimating unit that is equipped with a base station for each despread-and-demodulation unit, in the present invention, can be shared to tracking cell and channel estimating unit from same base station, when there is a plurality of despread-and-demodulations unit receiving element the inside, a footpath, can tracking cell and the channel estimating unit in traditional despread-and-demodulation unit be put forward, concerning this footpath receiving element, only need once cover follow the tracks of and channel estimating unit can, receiving element is merged together so follow tracking cell and channel estimating unit directly; The purpose of doing like this is to reduce resource by shared equal modules.
Wireless terminal receiver of the present invention also comprises the receiver control unit, is used for the distribution of control system resource, is that each physical channel distributes different footpath receiving elements.
As shown in Figure 5, this receiver control unit comprises initialization unit, signaling interface processing unit, signaling parsing and status unit, channel configuration unit, searcher control unit, information search processing unit:
This initialization control unit carries out initialization to all control registers and the status register of receiver, makes footpath receiving element and despreading demodulating unit be in release condition;
This signaling interface processing unit receives from the control command data of protocol stack layers to receiver, and gives the signaling parsing and carry out the parsing of signaling and the migration control of state with status unit;
This signaling is resolved and state processing unit, starts the searcher control unit according to the signaling analysis result to protocol stack;
This searcher control unit configuration searcher parameter is searched for output current base station frame synchronizing signal and multipath synchronizing signal to the present base station signal;
This channel configuration control unit receives the output signal of signaling parsing and status unit and searcher control unit, and according to the parameter of physical channel, configuration footpath receiving element and despreading demodulating unit are realized physical channel is received.
In the present invention, the receiver control unit mainly carries out controls such as sequential, resource distribution control etc. to whole receiver; The realization that it is concrete can be finished in single-chip microcomputer, DSP or CPU, and how receiver section is controlled, and different designers may be different with strategy because of algorithm, and show as different modes, but this does not influence realization of the present invention.
Wireless terminal receiver of the present invention, also comprise the channel quality assessment unit, data after this channel quality assessment unit merges each physical channel are carried out the quality evaluation behind the despread-and-demodulation, the result of assessment gives the control unit of receiver, the control unit of receiver comprises an information search processing unit, the quality evaluation data of evaluating receiving quality unit, and then carry out the resource adjustment, and export to the channel configuration unit, the channel configuration control unit is controlled redistributing of footpath receiving element and despreading demodulating unit according to adjusted channel resource allocation result.
As shown in Figure 6, based on above wireless terminal receiver, wireless signal receiving handling method of the present invention may further comprise the steps:
A, searcher unit obtain to follow the synchronous of base station signal, search out the multipath signal that never comes with the path;
B, the control unit characteristic of physical channel number, the physical channel of demodulation are as required given each physics letter
The road distributes different despread-and-demodulation unit and footpath receiving element;
C, footpath receiving element each physical channel to distributing carry out the processing of despread-and-demodulation unit, and output is every
Data after the multi path despreading demodulation of individual channel correspondence are given the multipath merge cells;
D, multipath merge cells merge the dateout of same physical channel Different Diameter receiving element, and be defeated
Go out the data after this physical channel multipath merges.
In order further to improve the reasonable distribution of footpath receiving element, the present invention has also increased the quality evaluation after data after a channel quality assessment module merges each physical channel are carried out despread-and-demodulation, and the result of assessment gives the control unit of receiver;
In the control unit of receiver,, this channel is carried out the dynamically distribution of footpath receiving element in conjunction with the characteristics of physical channel and the demodulation quality assessment result of this channel.
Comprise channel estimating unit, each channel is carried out the rectification of phase place and amplitude by the footpath receiving element.
In the present invention, comprise that also a BER or a BLER who extracts after channel decoding is exported is used as channel demodulation output quality evaluation criteria, thereby control the step of the configuration of dynamic adjustment channel resource.
A channel estimating unit is joined in every footpath, each channel is carried out the rectification of phase place and amplitude;
With the signal quality that merges output, the error rate (BER BIT ERROR RATE) such as pilot channel, the signal to noise ratio that perhaps measures (SNR SIGNAL NOISE RATIO) is carried out the dynamic assignment footpath according to the superframe (SFSUPER FRAME) of channel and the significance level of channel simultaneously.
See a concrete example below, in the WCDMA mobile communication system, it is 4 that there is the channel number of maximum possible sexual needs demodulation simultaneously in down channel, and we are made as ch1, ch2, ch3, ch4 respectively with these four channels.
The receiver physical resource is as follows: 8 footpath receiving elements (being numbered f1-f8 respectively), 16 despread-and-demodulation unit (being numbered ds1-ds16 respectively), a searcher unit (maximum is supported the synchronous of 8 road multipath signals), a multipath merge cells (support) to the data processing behind 16 road despread-and-demodulations, a channel quality assessment unit (maximum can be supported 4 channels are carried out channel quality assessment), a receiver control unit.
According to the situation of ch1-ch4 needs demodulate reception, carry out the course of work of the receiver of following several typical case:
Situation one: the situation that does not have resource contention
This situation comprises following several situation:
(1) current is carried out demodulate reception to a channel;
(2) current is carried out demodulate reception to 2 channels of difference from same base station;
Typically, with current a channel is carried out demodulate reception.
This situation is fairly simple: searcher is searched for to received signal, the multipath signal that output can participate in merging synchronously.If searcher exported 6 footpaths synchronously, then, then can distribute to this channel to 6 footpath receiving elements, and comprise a despread-and-demodulation unit in each footpath receiving element owing to currently have only a channel demodulation.Equally, if searcher exported 8 footpaths synchronously, then, still can distribute to this channel to 8 footpath receiving elements, and comprise a despread-and-demodulation unit in each footpath receiving element owing to currently have only a channel demodulation.Because in such cases, there is not the resource contention problem, so can not start the channel quality assessment unit, directly there is the receiver control unit this physical channel to be carried out the resource allocation of footpath receiving element and despreading demodulating unit.
Situation for (2) is that a kind of full configuration is put situation equally: the situation that full configuration puts occurring is exactly in each footpath receiving element 2 despread-and-demodulation unit to be arranged, the demodulate reception of a respectively corresponding physical channel separately, and 2 physical channels are shared 8 footpath allocation units.
Situation two: the situation that has resource contention; Except the top situation that does not have resource contention, all may there be resource contention in other situations.Typically, we suppose and need carry out demodulate reception to 4 channels simultaneously, and wherein 3 channels (ch1, ch2, ch3) are from same base station (BS1), and 1 channel (ch4) is from another base station (BS2).
At first, to the distribution of ch4 footpath 4 of receiving elements (corresponding f5, f6, f7, f8), comprise in each footpath receiving element that a despread-and-demodulation unit carries out demodulate reception to ch4 and (takies 4 despread-and-demodulation unit: ds13-ds16).Resource allocation to ch1, ch2, three channels of ch3 is as follows:
Table 1:
| ??f1 | ??f2 | ??f3 | ??f4 | |
| ??ch1 | ??ds1 | ??ds2 | ??ds3 | ??ds4 |
| ?ch2 | ?ds5 | ?ds6 | ?ds7 | ?ds8 |
| ?ch3 | ?ds9 | ?ds10 | ?ds11 | ?ds12 |
According to above configuration ch1-ch4 is carried out demodulate reception, despread-and-demodulation result to each physical channel output carries out the SNR estimation, if the SNR estimated result of ch1-ch3 can not satisfy the synchronous number of the annexable multipath of the requirement of demodulation performance and searcher output greater than 4 (can be assumed to be 6), and the SNR of ch4 is well positioned to meet performance requirement, then can discharge a footpath receiving element from ch4 and give ch1-ch3;
Physical resource after then ch4 redistributes is as shown in table 2 below:
Table 2:
| ??f6 | ??f7 | ??f8 | |
| ??ch4 | ??ds14 | ??ds15 | ??ds16 |
In remaining despread-and-demodulation unit, can not guarantee to carry out demodulate reception to ch1-ch3 in each footpath receiving element, distribute with the importance of each physical channel transmission information according to satisfying situation according to the ch1-ch3 performance this moment, physical channel important (such as signaling data) and SNR are bigger from the performance requirement difference, and guaranteeing has the despread-and-demodulation unit that this physical channel is carried out demodulate reception in each footpath receiving element; Satisfy performance requirement or little from the performance requirement difference for physical channel information transmitted inessential (such as voice data) and SNR, can distribute the despread-and-demodulation unit that this channel is received in several footpaths receiving element therein: table 3 be a kind of distribution condition:
Table 3:
| ?f1 | ?f2 | ?f3 | ?f4 | ?f5 | |
| ?ch1 | ?ds1 | ?ds2 | ?ds3 | ?ds4 | ?ds5 |
| ?ch2 | ?ds6 | ?ds7 | ?ds8 | ?ds9 | |
| ?ch3 | ?ds10 | ?ds11 | ?ds12 | ?ds13 |
In the resource allocation of last table, consider that mainly the ch1 channel mainly is a broadcast channel, and the performance requirement behind its despread-and-demodulation is than higher, so the footpath receiving element of having compared ch2 and ch3 overabsorption;
If when the important information of ch2 transmission, and during the unessential relatively information (as business datum) of ch3 transmission, just can adopt distribution method as table 4:
Table 4:
| ??f1 | ??f2 | ??f3 | ??f4 | ??f5 | |
| ??ch1 | ??ds1 | ??ds2 | ??ds3 | ??ds4 | ??ds5 |
| ??ch2 | ??ds6 | ??ds7 | ??ds8 | ??ds9 | ??ds10 |
| ??ch3 | ??ds11 | ??ds12 | ??ds13 |
By such method, can adjust the demodulation resource that each physical channel is distributed dynamically, reach the purpose of rationally utilizing the portable terminal demodulation resource, can improve the demodulation performance of physical channel simultaneously.
By the present invention, can come the different physical channel that receives simultaneously as much as possible with less physical resource, can guarantee the demodulate reception performance of physical channel simultaneously, and the present invention can make physical channel demodulation resource utilization maximization.According to the physical channel design of needs demodulate reception simultaneously the footpath processing unit number of portable terminal and the number of despread-and-demodulation, can distribute available footpath as much as possible receiving element for the physical channel that needs demodulate reception, carry out despread-and-demodulation, multipath merging with effective multipath that can participate in merging, improve physical resource utilization same physical channel.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with the people of this technology in the disclosed technical scope of the present invention; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claims.
Claims (10)
1, a kind of wireless terminal receiver, comprise searcher unit, footpath receiving element and multipath merge cells, it is characterized in that also comprising the receiver control unit, described footpath receiving element comprises a plurality of despread-and-demodulation unit that can freely dispose, and each footpath receiving element also comprises tracking cell and the channel estimating unit that is complementary with it;
Base station spread-spectrum signal and multipath signal search and export to the footpath receiving element by described searcher unit, and the data before the footpath receiving element recovers spectrum-spreading and scrambling are exported to the multipath merge cells and merged output;
Described receiver control unit is used for distributing different footpath receiving elements into each physical channel;
Described tracking cell is used for the multipath that searches out is carried out further precise synchronization synchronously;
Described channel estimating unit is used for coming the signal of despread-and-demodulation output is carried out the rectification of phase place and amplitude according to the result to radio channel estimation.
2, wireless terminal receiver as claimed in claim 1 is characterized in that described despread-and-demodulation unit comprises: pseudo-code generating unit, despread unit, demodulating unit;
Described pseudo-code generating unit carries out multiple multiplication local the generation with the pseudo noise code of the same sequence of transmitter and the spread-spectrum signal of input of receiver;
Described despread unit is finished the spread-spectrum signal of input and the local pseudo noise code that produces is carried out multiple multiplication, remove spreading code and scrambler in the signal, recover the preceding data of spectrum-spreading and scrambling and export to demodulating unit, carry out demodulation, and export to the multipath merge cells.
3, wireless terminal receiver as claimed in claim 2, it is characterized in that described receiver control unit, comprise initialization unit, signaling interface processing unit, signaling parsing and status unit, channel configuration unit, searcher control unit, information search processing unit:
Described initialization control unit carries out initialization to all control registers and the status register of receiver, makes footpath receiving element and despreading demodulating unit be in release condition;
From protocol stack layers to the control command data of receiver after the signaling interface processing unit receives, resolve the migration control of advancing parsing and state with status unit by signaling, signaling is resolved with state processing unit and is started the searcher control unit according to analysis result, by searcher control unit configuration searcher parameter, the present base station signal is searched for output current base station frame synchronizing signal and multipath synchronizing signal;
Described channel configuration control unit receives the output signal of signaling parsing and status unit and searcher control unit, and according to the parameter of physical channel, configuration footpath receiving element and despreading demodulating unit are realized physical channel is received.
4, wireless terminal receiver as claimed in claim 3, it is characterized in that also comprising the channel quality assessment unit, data after described channel quality assessment unit merges each physical channel are carried out the quality evaluation behind the despread-and-demodulation, the result of assessment gives the control unit of receiver, the control unit of receiver comprises an information search processing unit, the quality evaluation data of evaluating receiving quality unit, and then carry out the resource dynamic adjustment, and export to the channel configuration unit, the channel configuration control unit is controlled redistributing of footpath receiving element and despreading demodulating unit according to adjusted channel resource allocation result.
5, wireless terminal receiver as claimed in claim 4, it is characterized in that in the receiving element of described footpath, each footpath receiving element comprises a channel estimating unit and tracking cell, described channel estimating unit is carried out the rectification of phase place and amplitude to each channel, and described tracking cell carries out further precise synchronization to the multipath synchronizing signal that searches out.
6, wireless terminal receiver as claimed in claim 5 is characterized in that the number of the despread-and-demodulation unit in the receiving element of described footpath can be identical, also can be inequality.
7, a kind of wireless signal receiving handling method is characterized in that may further comprise the steps:
A, searcher unit obtain to follow the synchronous of base station signal, search out the multipath signal that never comes with the path;
B, the control unit characteristic of physical channel number, the physical channel of demodulation are as required given each physics letter
The road distributes different despread-and-demodulation unit and footpath receiving element;
C, footpath receiving element each physical channel to distributing carry out the processing of despread-and-demodulation unit, and output is every
Data after the multi path despreading demodulation of individual channel correspondence are given the multipath merge cells;
D, multipath merge cells merge the dateout of same physical channel Different Diameter receiving element, and be defeated
Go out the data after this physical channel multipath merges.
8, wireless signal receiving handling method as claimed in claim 7 is characterized in that also comprising:
Data after the channel quality assessment module merges each physical channel are carried out the quality evaluation behind the despread-and-demodulation, and the result of assessment gives the control unit of receiver;
In the control unit of receiver,, this channel is carried out the dynamically distribution of footpath receiving element in conjunction with the characteristics of physical channel and the demodulation quality assessment result of this channel.
9, wireless signal receiving handling method as claimed in claim 8 is characterized in that also comprising the channel estimating unit by the footpath receiving element, each channel is carried out the rectification of phase place and amplitude.
10, wireless signal receiving handling method as claimed in claim 9 is characterized in that also comprising the output signal of extracting the channel decoding unit as channel demodulation output quality evaluation criteria, thereby controls the configuration of dynamic adjustment channel resource.
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| CN 02126004 CN1245813C (en) | 2002-08-07 | 2002-08-07 | Radio terminal receiver and radio signal receiving treating method |
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| CN 02126004 CN1245813C (en) | 2002-08-07 | 2002-08-07 | Radio terminal receiver and radio signal receiving treating method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007068138A1 (en) * | 2005-12-12 | 2007-06-21 | Zte Corporation | A system and method for adjusting amplitude of the channel decoded data in cdma system |
| CN1798000B (en) * | 2004-12-30 | 2010-09-29 | 上海宣普实业有限公司 | Timed down going capturing and tracking method in CDMA system |
| CN103516391A (en) * | 2012-06-15 | 2014-01-15 | 中兴通讯股份有限公司 | Multipath detection method and apparatus |
| CN110677866A (en) * | 2019-09-29 | 2020-01-10 | 展讯通信（上海）有限公司 | Data monitoring method of sniffer, storage medium and terminal |
-
2002
- 2002-08-07 CN CN 02126004 patent/CN1245813C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1798000B (en) * | 2004-12-30 | 2010-09-29 | 上海宣普实业有限公司 | Timed down going capturing and tracking method in CDMA system |
| WO2007068138A1 (en) * | 2005-12-12 | 2007-06-21 | Zte Corporation | A system and method for adjusting amplitude of the channel decoded data in cdma system |
| CN101258702B (en) * | 2005-12-12 | 2012-05-30 | 中兴通讯股份有限公司 | System and method for modulating channel decoding data amplitude in code division multiple access system |
| CN103516391A (en) * | 2012-06-15 | 2014-01-15 | 中兴通讯股份有限公司 | Multipath detection method and apparatus |
| CN103516391B (en) * | 2012-06-15 | 2017-03-29 | 中兴通讯股份有限公司 | Multi-path detecting method and device |
| CN110677866A (en) * | 2019-09-29 | 2020-01-10 | 展讯通信（上海）有限公司 | Data monitoring method of sniffer, storage medium and terminal |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1245813C (en) | 2006-03-15 |
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