CN1325200A - Discontinuous emission treating method and device in wideband CDMA system - Google Patents
Discontinuous emission treating method and device in wideband CDMA system Download PDFInfo
- Publication number
- CN1325200A CN1325200A CN00119764A CN00119764A CN1325200A CN 1325200 A CN1325200 A CN 1325200A CN 00119764 A CN00119764 A CN 00119764A CN 00119764 A CN00119764 A CN 00119764A CN 1325200 A CN1325200 A CN 1325200A
- Authority
- CN
- China
- Prior art keywords
- bit
- dtx
- information
- symbol
- scrambling
- 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.)
- Granted
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The present invention discloses a method for implementing and processing DTX bit in WCDMA system and its equipment. Said method adopts increment of indicating bit to discriminate active message bit from DTX bit, and uses the indicating bit to control extraction of DTX bit and ensures that the DTX bit can be extracted from active message before multiplication by power factor to attain the goal of power control. Said equipment includes channel code multiplex module, interface module, spread-spectrum and interference module and power control module. Said inventino can implement real time burst closed emission and power-decreasing emission, so it reduces complexity of power control module, and can simplify implement process and save system software and hardware.
Description
The present invention relates to WCDMA WCDMA (Wide Bandwidth Code Division Multiple Access) system, more specifically to implementation method and the treating apparatus thereof of discontinuous emission DTX (Discontinuous Transmission) in the WCDMA system.
WCDMA is a kind of CDMA multi-user mobile system, a plurality of users carry out transmission information by the mode that different binary code sequences carries out spread spectrum under same frequency, any one user's information transmits and will cause interference to other users like this, all is a kind of noise jamming concerning other users. Therefore each user's information delivering power to accomplish both to have guaranteed quality that own information transmits again reduce to other users' interference. Information is to transmit according to certain speed in the WCDMA system, in order to realize the consistent of transmitted bit speed, adopts the DTX bit that inserts some in information flow outwards to launch information. The DTX bit is a kind of idle bit, do not comprise useful information, therefore emitter is when outside emission information, the DTX bit can not be launched, but carry out discontinuous transmission: when detecting the DTX bit, close emitter, normal transmission when detecting non-DTX bit, thus the ERP of channel reduced and to the interference of other channel.
In present GSM (Global System For Mobile Communication) GSM and CDMA (Code Division Multiple Access) GSM all relevant for the processing that realizes the discontinuous transmitting DTX bit. DTX bit process in the gsm system is to closing emission at speech information between the rest periods. Whether each frame that detects speech coding by appropriate threshold level is set contains speech information, if launch when detecting Speech frame, if close emission during without speech, it is to close emission fully what a whole frame was determined the time; In cdma system, with GSM to close emission fully similar, information is carried out code element according to the requirement of transfer rate and is repeated, repetition bits all in forward channel all send, just the different rates transmitting power is different; In backward channel according to the difference of transfer rate, the emission by the different power control group (time slot) of gating circuit control and not launching, when not launching be whole time slot close emission fully. Can not change the position of DTX bit in transport process when in GSM and cdma system, processing the DTX bit in sum, and discontinuous transmission is that processing method is simple take whole frame or whole time slot as unit. And and the base unit of the discontinuous transmission in the WCDMA system is code element, and element position can be different because of the difference of the speed of transmission channel, rate matching mode etc., and after process interweaves, the DTX bit can be distributed to positions different in the information flow, have uncertain and scattered property, especially after the plural scrambling of process, DTX bit and information bit can add up, the control of DTX bit in transport process just becomes very complicated like this, require to realize closing emission and falling power emission of in real time burst, owing to can't learn in advance the position of code element, so expression and the scheme of processing the DTX bit are not applicable to the WCDMA system in GSM and the cdma system.
One of purpose of the present invention is, the method of processing discontinuous emission in a kind of WCDMA system is provided, the method has adopted and has added indicating bit to distinguish information bit and DTX bit, effectively the DTX bit in the expression broadband CDMA system and with this indicating bit as control bit, close emission in order to control the DTX bit.
Two of purpose of the present invention is, downgoing baseband signal processing apparatus in a kind of WCDMA system that realizes said method is provided.
The method of the invention is achieved through the following technical solutions:
1, adopt two bits (b1b0) to represent different information states, high order bit (b1) shows whether low-order bit (b0) is effective information; Low-order bit (b0) expression information state;
2, the information exchange of transmission channel is crossed rate matching and is mapped in the corresponding physical channel, inserts DTX bit indicating bit after rate-matched, and original each information represents with two bits after the DTX bit plug-in unit;
3, above-mentioned mapping result is carried out the asynchronous communication of data and the buffer memory of data;
4, finish spread spectrum and the scrambling of base band physical channel, and the extraction of DTX bit and the output of binary system true form;
5, finish power control, and according to certain transmitting power transmission of symbols is gone out.
In the method step 1 of above-mentioned processing DTX bit, described information adopts two bits (b1b0) to represent different information states, and high order bit (b1) is the information indication, shows whether low-order bit (b0) is effective information; Low-order bit (b0) expression information state; That is to say to represent that when b1 is 0 b0 is effective information, i.e. ' 00 ' expression information ' 0 ', ' 01 ' expression information ' 1 '; When being 1, b1 represents that b0 adds information D TX, i.e. ' 11 ' or ' 10 ' expression DTX bit.
In the method step 2 of above-mentioned processing DTX bit, finish successively coding cyclic redundancy check method CRC (Cyclic Redundancy Check) coding, chnnel coding, rate-matched, after rate-matched, carry out the first time of DTX bit indicating bit and insert; After finishing this time insertion, carry out interweaving the first time, radio frame segmentation after transmission channel is multiplexing, is next carried out the DTX bit indicating bit insertion second time; After finishing above twice insertion, further finish at last physical channel segmentation, interweave for the second time and the process such as physical channel mapping; Represent with two bits in later original each information of the DTX bit plug-in unit first time.
In the spread spectrum and scrambling process of the base band physical channel in the method completing steps 4 of above-mentioned processing DTX bit: finish successively following each stage:
At first binary bits is corresponded to the real number symbol, the process channel coding module is gone here and there symbol and is changed;
Then transformation result multiply by the real number spread spectrum codes CchCarry out spread spectrum;
Last spread spectrum result multiply by plural scrambler SdlFinish the scrambling process.
It is with information bit the ' 0 ' corresponding real number symbol+1 that described binary bits corresponds to the real number symbol, information bit the ' 1 ' corresponding real number symbol-1, and the corresponding real number symbol 0 of DTX bit.
Symbol after the described channel coding module is gone here and there and changed is that symbol is divided into I, the Q two-way, and the sign map of even-numbered is to the I road, and the sign map of odd-numbered is to the Q road.
Described transformation result multiply by the real number spread spectrum codes CchCarrying out spread spectrum is I, and Q two-way symbol multiply by respectively the real number spread spectrum codes CchCarry out spread spectrum.
In the extraction and binary system true form output procedure of the DTX bit in the method step 4 of above-mentioned processing DTX bit, further comprise:
At first only make the symbol low level participate in the spectrum-spreading and scrambling computing, a symbol high position remains unchanged, with among the spectrum-spreading and scrambling result each real multiply, add computing and when circuit is realized, be converted into simple binary arithmetic operation;
Secondly through obtaining the binary result of each after simple the calculating, judge that the more high-order information of I road and Q road incoming symbol indicates whether to be DTX, judge just can directly shine upon by lookup table mode or logic to obtain I, Q symbol through the former code data of three bit tape symbols after the spectrum-spreading and scrambling;
Output at last power control module.
Described real multiply, add computing when circuit is realized, be converted into simple binary arithmetic operation refer to the spectrum-spreading and scrambling result in each real multiply, add computing and when circuit is realized, be converted into simple binary arithmetic operation, real multiplications computing in the formula is converted into the binary system XOR, the real addition computing is converted into binary system mould two and adds computing, and subtraction is converted into to be got first non-again mould two and add computing.
The high-order information of described judgement I road and Q road incoming symbol indicates whether to be DTX, judge by lookup table mode or logic and just can directly shine upon the process that I, Q symbol pass through the former code data of three bit tape symbols after the spectrum-spreading and scrambling that obtains, refer to the DTX bit extraction out, if namely to indicate this information bit be the DTX bit to the high position of I, Q two-way, then three bit tape symbol true form data results are 0; If only having a high position of one tunnel to indicate this information bit in I, the Q two-way is the DTX bit, then three bit tape symbol true form data results are other one tunnel value; If to indicate this information bit all be the effective information bit to the high position of two-way in I, the Q two-way, then three bit tape symbol true form data results are normal accumulation result.
In method step 5 power control process of above-mentioned processing DTX bit, comprise: three bit tape symbol true form data results after the spectrum-spreading and scrambling be multiply by corresponding power factor emission, control the size of its output amplitude; The DTX bit is launched with zero energy, be implemented in the discontinuous emission in the WCDMA system.
Device of the present invention is achieved through the following technical solutions:
Described downgoing baseband signal processing apparatus comprises: chnnel coding Multiplexing module, interface module, spread spectrum and scrambling module and power control module.
Described channel coding module is finished CRC check, chnnel coding, rate-matched, the insertion of DTX bit, interweave with the first time, transmission channel is multiplexing, interweave for the second time and physical channel shines upon, and mapping result is sent into interface module extract for the spectrum-spreading and scrambling module.
Described interface module is the buffer interface between chnnel coding Multiplexing module and the spectrum-spreading and scrambling module, finishes the asynchronous communication of data between these two modules and the buffer memory of data.
Described spectrum-spreading and scrambling module is finished spread spectrum and the scrambling of base band physical channel, and the extraction of DTX bit and the output of binary system true form.
Described power control module is finished the control of transmitting power. The present invention is described in further detail by reference to the accompanying drawings according to specific embodiment for the below.
Fig. 1 is downgoing baseband Channel Processing device schematic diagram of the present invention; Fig. 2 base band descending transmission channel rate matching process schematic diagram; Fig. 3 inserts schematic diagram after the DTX bit rate coupling; Fig. 4 is baseband channel spread spectrum, scrambling and power control process schematic diagram; Fig. 5 is baseband channel spectrum-spreading and scrambling and transmit power control module structural representation;
Figure 1 shows that downgoing baseband Channel Processing device schematic diagram. The processing of finishing baseband channel must be through chnnel coding and multiplexing, spread spectrum, scrambling and power control unit, accordingly, channel processing module of the present invention is divided into chnnel coding and Multiplexing module 100, interface module 200, spread spectrum and scrambling module 300 and power control module 400. Below in conjunction with Fig. 2 the rate matching process is described in detail, in conjunction with Fig. 3 the insertion of DTX bit is described in detail, in conjunction with Fig. 4 spectrum-spreading and scrambling and power control module are elaborated. Figure 2 shows that base band descending transmission channel rate matching process schematic diagram. In order to further specify the residing position in the base band descending transmission channel rate matching process that is inserted in of DTX bit indicating bit, below we describe whole transmission channel coding and multiplex process by the stage. At first, need the information bit of transmission through coding cyclic redundancy check method CRC (Cyclic Redundancy Check) coding, chnnel coding, after the rate-matched, at this moment will carry out for the first time insertion of DTX bit indicating bit according to the requirement of transfer rate, be to realize the insertion of DTX bit indicating bit, original each information represents with two bits, so after various processing procedures in also all will be take two bits as unit. High order bit in two bits is indicated as the information indicating bit whether low-order bit is effective information; Low-order bit then is used for representing information state. For example when high order bit was 0, expression low-order bit thereafter was information bit; High order bit is that 1 expression low-order bit thereafter is for adding information D TX. Namely ' 00 ' expression information ' 0 ', ' 01 ' expression information ' 1 ', ' 11 ' or ' 10 ' represents DTX. Next carry out interweaving the first time, radio frame segmentation, transmission channel is multiplexing, and DTX bit indicating bit inserts for the second time, physical channel segmentation, at this moment carry out according to the requirement of transfer rate the second time DTX bit the method for insertion identical with the insertion method of primary DTX bit. Carry out again at last interweaving the second time and the physical channel mapping. Thereby finish whole base band descending transmission channel rate matching process. Fig. 3 illustrates DTX and is inserted in status and effect in the system coding multiplex process. Take voice service as example, each transmission time interval input bit number is 80, is 96 through 16 CRC coded bit numbers, and for carrying out chnnel coding, the tail code that adds 8 bits behind CRC output bit obtains 104 bits. If chnnel coding adopts 1/3 convolutional encoding scheme, then the chnnel coding result is 104 * 3=312 bit. Next 325 bits are exported in the rate-matched unit. For the code multiplexing scheme of voice service, each unit does not all change bit number later on. For last physical channel map unit, do not have this situation of 325 bits in the input bit table of the 3GPP of WCDMA standardization body regulation, and with 325 immediate be 420 bits. Therefore can adopt the method for inserting 95 DTX bits to make the input of physical channel map unit rise to 420 bits by 325 bits, reach the bit rate of regulation. Figure 4 shows that base band physical channel spread spectrum, scrambling and power control process. This process is divided four-stage: the data that at first will need to transmit are assigned to I, Q two-way through string and conversion; Secondly I, Q two paths of data are carried out spread spectrum by spreading code simultaneously; Then I, the Q two paths of data behind the spread spectrum carried out scrambling by scrambler; Multiply by at last power factor and carry out power control. According to the 3GPP standard code, this phase process corresponds to the real number symbol with binary bits and processes, and that is to say information bit the ' 0 ' corresponding real number symbol+1, information bit the ' 1 ' corresponding real number symbol-1, and the corresponding real number symbol 0 of DTX bit. See the following form:
Described string and conversion portion are with through at first process string and conversion of the symbol after the channel coding module, are divided into I, the Q two-way, and the sign map of even-numbered is to the I road, and the sign map of odd-numbered is to the Q road. If with s0, and s1, s2, s3, s4, s5 ... expression incoming symbol sequence, then s0, and s2, s4 ... be mapped to the I road, and s1,, s3, s5 ... be mapped to the Q road. Described spread spectrum process is with I, and the Q two-way multiply by respectively the real number spread spectrum codes CchCarry out spread processing. Described scrambling process be with the data behind the spread spectrum with the I road as real part, the Q road obtains sequence of complex numbers I+jQ as imaginary part. Sequence of complex numbers I+jQ multiply by plural scrambler SdlFinish the scrambling process. The process of spectrum-spreading and scrambling can be represented by formula: S=(I * Cch+jQ×C
ch)×S
dl
=C
ch×(I+jQ)×S
dlFormula (1) is I wherein, and Q represents respectively I road and Q road symbol. Scrambler is that plural scrambler can be expressed as Sdl=S
dl,I+jS
dl,QFormula (2) is with scrambler expression formula (2) substitution formula (1), then S=Cch×(I+jQ)×(S
dl,I+j S
dl,Q)
=C
ch×{(I×S
dl,I-Q×S
dl,Q)+j(I×S
dl,Q+Q×S
dl,I) formula (3) like this real part be SI=C
ch×(I×S
dl,I-Q×S
dl,Q) formula (4)
| Real number | +1 | -1 | 0 |
| Binary system | 0 | 1 | DTX |
Imaginary part is SQ=C
ch×(I×S
dl,Q+Q×S
dl,I) formula (5) is above-mentioned multiply by power factor to carry out power control process be multiply by power factor through the data after the spectrum-spreading and scrambling, finishes power control. How to realize information code current is processed in circuit according to above-mentioned requirements so, how extracting the DTX bit, to carry out transmitting power control be exactly emphasis of the present invention. Specific implementation will be described in detail below. The structural representation of baseband channel processing module shown in Figure 5. Finish successively each stage in this module: the data that at first docking 200 modules provides are gone here and there and are changed and are divided into I, Q two-way along separate routes, generate in real time simultaneously spreading code and scrambler; Secondly I, Q two paths of data are carried out spread spectrum and scrambling with spreading code and scrambler, when spectrum-spreading and scrambling is calculated, finish extraction and the output of binary system true form of DTX bit. Spreading code generation module 301 is used for generating in real time spread spectrum codes Cch Scrambler generation module 302 is used for generating in real time scrambler sequence Sdl,IAnd Sdl,Q String and modular converter 303 are used for the data of transmission are carried out I, Q two-way along separate routes. Spectrum-spreading and scrambling and binary system carry out spread spectrum and scrambling to the modular converter 304 of real number for the data of finishing transmission, and finish extraction and the output of binary system true form of DTX bit. Described string and modular converter 303 are obtained the bit behind the code multiplexing from interface module 200, owing to added DTX, be actually with 2 bits and represent respectively information ' 0 ', ' 1 ' and DTX, so when going here and there and transform, process unit with 2 bits as one. If with { b00,b
01,b
10,b
11,b
20,b
21... the bit sequence that read by interface module 200 of expression, then { b00,b
01Expression symbol s0,{b
10,b
11Expression symbol s1, analogize in proper order. Through after string and the conversion, I road sequence is { b like this00,b
01,b
20,b
21,b
40,b
41..., Q road sequence is { b10,b
11,b
30,b
31,b
50,b
51.... Each symbol is comprised of 2 bits, and the high order bit in two bits is the information indicating bit, shows whether low-order bit is effective information; Low-order bit represents information state. High order bit is that 0 expression low-order bit is information bit; High order bit is that 1 expression low-order bit is for adding information D TX bit. Namely ' 00 ' expression information ' 0 ', ' 01 ' expression information ' 1 ', ' 11 ' or ' 10 ' represents DTX. After string and conversion are finished, the two-way symbol is sent into spectrum-spreading and scrambling module 304.
Described 304 modules receive the two-way symbol that string and modular converter 303 provide, and the binary system scrambler sequence that the binary system spread spectrum code sequence that is provided by spreading code generation module 301 and scrambler generation module 302 provide is carried out respectively spread spectrum and scrambling. In order after spectrum-spreading and scrambling, still can to pick out DTX and information bit, and simplify the spectrum-spreading and scrambling process, in spectrum-spreading and scrambling module 304, only make the symbol low level participate in the spectrum-spreading and scrambling computing (such as b00, b10,b
20,b
30,b
40,b
50...), a symbol high position does not participate in computing (such as b01,b
11,b
21,b
31,b
41,b
51...), remain unchanged, consider but give over to when back control is processed. Because all computings all are binary arithmetic operations in digital circuit, the real multiply of each in this pattern (3), add computing when circuit is realized all the corresponding relation according to following table be converted into simple binary arithmetic operation, real multiplications computing in the formula is converted into the binary system XOR, the real addition computing is converted into binary system mould two and adds computing, and subtraction is converted into to be got first non-again mould two and add computing.
This pattern (4) offers the I road and just is converted into: =S1+S2 formula (6) is S1=C whereinchIS
dl,IFormula (7)
Formula (5) offers the Q road and just is converted into: SQ=C
chIS
dl,Q+C
chQS
dl,I=S3+S4 formula (9) is S3=C whereinchIS
dl,QFormula (10)
| Real number | +1 | -1 | 0 |
| Binary system | 0 | 1 | DTX |
| After inserting DTX | 00 | 01 | 11/10 |
S4=C
chQS
dl,IFormula (11) just can obtain merging front result after the symbols spread scrambling through simple calculating according to formula (7), formula (8) and formula (10), formula (11), the method for expressing that represents a symbol with two bits of the present invention, because only have a bit to participate in computing, so do not increase the complexity of spectrum-spreading and scrambling process. Calculating because the power calculation in the power control module 400 is multiplication, therefore just require spectrum-spreading and scrambling module 300 output binary system true forms, must be the binary system true form in the latter incorporated result of spectrum-spreading and scrambling namely. In merging process, adopt the mode of mapping, consider simultaneously high-order information indicating bit, union operation is carried out with the processing of DTX bit. Illustrate the front, and the incoming symbol value of spectrum-spreading and scrambling module is+1 ,-1 and 0. The value of spreading code and scrambler sequence is+1 or-1, pass through like this taking advantage of of formula (4) and formula (5), addition, subtraction operation after, span is+2 ,+1,0 ,-1 ,-2 as a result. These five kinds of values represent with three bit true forms in digital display circuit, namely
Correspondingly, when the digital circuit computing, according to formula (6), formula (9) also can obtain the result of calculation identical with formula (5) with formula (4). At this moment will when calculating, high-order information indicating bit be taken into account.
Be real number corresponding to binary number in the table bracket. X is expressed as arbitrary value in 0,1. According to upper table, only need to obtain S1 through simple binary computations, S2, S3, S4, judge that the more high-order information of I road and Q road incoming symbol indicates whether to be DTX, judge just can directly shine upon by lookup table mode or logic to obtain I, Q symbol through the former code data of three bit tape symbols after the spectrum-spreading and scrambling, output at last power control module 400. This is another characteristics of the present invention, with the add operation of complexity and the complicated transformational relation of binary system and real number, realizes by lookup table mode or logic correct judgment. The below describes in detail for example. Suppose that I road incoming symbol is information 0 (00), Q road incoming symbol is information 1 (01), and high-order (0) remains unchanged, and low level (0 and 1) is participated in computing, calculates according to formula (7) and formula (8), supposes to obtain S1=1, S2=1. Know that according to formula (7) and formula (8) S1 and S2 are respectively the result of calculation of I road and the input of Q road, judge that at this moment an I road symbol high position is that 0, a Q road symbol high position is 0 also, tabling look-up obtains (S1+S2)2=110, real number value is-2. Express the cumulative result of information. Suppose that I road incoming symbol is information 0 (00), Q road incoming symbol is DTX (11), and high-order (0 and 1) remains unchanged, low level (0 and 1) is participated in computing, calculate according to formula (7) and formula (8), suppose to calculate S1=0, S2=0. Know that according to formula (7) and formula (8) S1 and S2 are respectively the result of calculation of I road and the input of Q road, at this moment judge that an I road symbol high position is 0, Q road symbol is that a high position is 1, table look-up and obtain (S1+S2) 2=001, real number value is 1, be the value of information 0 correspondence, i.e. the insertion of DTX can not change normal information data and process. Suppose that I road incoming symbol is DTX (11), Q road incoming symbol is DTX (11), high-order (1) remains unchanged, and low level (1) is participated in computing, calculates according to formula (7) and formula (8), suppose to calculate S1=0, S2=1 knows that according to formula (7) and formula (8) at this moment S1 and S2 are respectively the result of calculation of I road and the input of Q road, judge that an I road symbol high position is 1, Q road symbol is that a high position is 1, and tabling look-up obtains (S1+S2)2=000, real number value is 0, is value corresponding to DTX. Concerning the Q road, process identical with the I road.
| Real number | -2 | -1 | 0 | +1 | +2 |
| Binary system | 110 | 101 | 000 | 001 | 010 |
Described power control module 400 is finished the control function of power of channel, namely the former code data of three bit tape symbols be multiply by corresponding power factor, launches according to certain emission amplitude. For the DTX bit, its transmitting power should be made as 0, does not namely launch, and so just can not cause interference to other channels. In the superincumbent explanation, we see that after spectrum-spreading and scrambling merged, the data of output were the result of effective information fully, all have been set to 0 when the input of DTX bit is in the end exported, and can not be added in the effective information. Like this, when multiply by power factor, effective information output data, normal transmission is gone out; And 0 multiply by the power factor of arbitrary value, and the result is 0 all the time during computing, thereby transmitting power is 0, arrived the purpose of closing emission.
The invention provides downgoing baseband signal processing apparatus in the simple realization method that spectrum-spreading and scrambling and power control etc. processes and the WCDMA system that realizes the inventive method. Described method has adopted at broadband CDMA system and has added DTX bit indicating bit to distinguish information bit and DTX bit, has effectively realized the expression of the DTX bit in the broadband CDMA system. Simultaneously, with this indicating bit as control bit, thereby control DTX bit close emission, reduce the interference to other user. It is many that DTX position in the WCDMA system relates to module, method and apparatus of the present invention can represent intuitively the DTX bit and DTX bit and useful information difference are come, thereby the highly effective appearance of judging fast the DTX bit, and in advance before power control just with the DTX bit extraction out, can not be added in the power control module of back, thereby reduce the complexity of power control module, reach the purpose of power control, the simple implementation process is saved system hardware and software.
Claims (12)
1, a kind of method that in the WCDMA system, represents and process the DTX bit, it is characterized in that may further comprise the steps: at first: adopt two bits (b1b0) to represent different information states, high order bit (b1) shows whether low-order bit (b0) is effective information; Low-order bit (b0) expression information state; Secondly: the information exchange of transmission channel is crossed rate matching and is mapped in the corresponding physical channel, carries out the insertion of DTX bit indicating bit after rate-matched, and original each information represents with two bits after the DTX bit plug-in unit of fixed position; Then: above-mentioned mapping result is carried out the asynchronous communication of data and the buffer memory of data; Again: finish spread spectrum, the scrambling of base band physical channel, and the extraction of DTX bit and the output of binary system true form; At last: finish power control, according to certain transmitting power transmission of symbols is gone out.
2, the method for expression according to claim 1 and processing DTX bit, it is characterized in that: two bits of described employing (b1b0) represent different information states, comprise: as the information indication, show whether low-order bit (b0) is effective information with high order bit (b1); With low-order bit (b0) expression information state; When being 0, b1 represents that b0 is effective information, i.e. ' 00 ' expression information ' 0 ', ' 01 ' expression information ' 1 '; When being 1, b1 represents that b0 adds information D TX, i.e. ' 11 ' or ' 10 ' expression DTX bit.
3, the method for expression according to claim 1 and processing DTX bit, it is characterized in that: finish successively coding cyclic redundancy check method CRC (Cyclic Redundancy Check) coding, chnnel coding, rate-matched, after rate-matched, carry out the first time of DTX bit indicating bit and insert; Then, carry out interweaving the first time, radio frame segmentation, transmission channel is multiplexing; Next carry out again the DTX bit indicating bit insertion second time; After finishing above twice insertion, further finish at last physical channel segmentation, interweave and the process such as physical channel mapping for the second time, original each information represents with two bits after first time DTX bit plug-in unit.
4, the method for expression according to claim 1 and processing DTX bit, it is characterized in that: in the spread spectrum of base band physical channel and the scrambling process: finish successively following each stage: at first binary bits is corresponded to the real number symbol, the process channel coding module is gone here and there symbol and is changed; Then transformation result multiply by the real number spread spectrum codes CchCarry out spread spectrum; Last spread spectrum result multiply by plural scrambler SdlFinish the scrambling process.
5, the method for expression according to claim 4 and processing DTX bit, it is characterized in that: it is with information bit the ' 0 ' corresponding real number symbol+1 that described binary bits corresponds to the real number symbol, information bit the ' 1 ' corresponding real number symbol-1, and the corresponding real number symbol 0 of DTX bit.
6, the method for expression according to claim 4 and processing DTX bit, it is characterized in that: the symbol after the described channel coding module is gone here and there and changed is that symbol is divided into I, Q two-way, the sign map of even-numbered are to the I road, and the sign map of odd-numbered is to the Q road.
7, the method for expression according to claim 4 and processing DTX bit, it is characterized in that: described transformation result multiply by the real number spread spectrum codes CchCarrying out spread spectrum is I, and Q two-way symbol multiply by respectively the real number spread spectrum codes CchCarry out spread spectrum.
8, the method for expression according to claim 1 and processing DTX bit is characterized in that: in the leaching process of DTX bit:
At first only make the symbol low level participate in the spectrum-spreading and scrambling computing, a symbol high position remains unchanged, with among the spectrum-spreading and scrambling result each real multiply, add computing and when circuit is realized, be converted into simple binary arithmetic operation; Secondly through obtaining the binary result of each after simple the calculating, judge that the more high-order information of I road and Q road incoming symbol indicates whether to be DTX, judge just can directly shine upon by lookup table mode or logic to obtain I, Q symbol through the former code data of three bit tape symbols after the spectrum-spreading and scrambling; At last the result is outputed to power control module.
9, the method for expression according to claim 8 and processing DTX bit, it is characterized in that: described real multiply, add computing when circuit is realized, be converted into simple binary arithmetic operation refer to the spectrum-spreading and scrambling result in each real multiply, add computing and when circuit is realized, be converted into simple binary arithmetic operation, real multiplications computing in the formula is converted into the binary system XOR, the real addition computing is converted into binary system mould two and adds computing, and subtraction is converted into to be got first non-again mould two and add computing.
10, the method for expression according to claim 8 and processing DTX bit, it is characterized in that: the high-order information of disconnected I road and Q road incoming symbol indicates whether to be DTX, judge by lookup table mode or logic and just can directly shine upon the process that I, Q symbol pass through the former code data of three bit tape symbols after the spectrum-spreading and scrambling that obtains, refer to the DTX bit extraction out, if namely to indicate this information bit be the DTX bit to the high position of I, Q two-way, then three bit tape symbol true form data results are 0; If only having a high position of one tunnel to indicate this information bit in I, the Q two-way is that the DTX bit is the DTX bit, then three bit tape symbol true form data results are other one tunnel value; If to indicate this information bit all be the effective information bit to the high position of two-way in I, the Q two-way, then three bit tape symbol true form data results are normal accumulation result.
11, the method for expression according to claim 1 and processing DTX bit is characterized in that: three bit tape symbol true form data results after the spectrum-spreading and scrambling be multiply by corresponding power factor emission, control the size of its output amplitude; The DTX bit is launched with zero energy, is implemented in discontinuous emission in the WCDMA system.
12, downgoing baseband signal processing apparatus in a kind of WCDMA system that realizes said method, it is characterized in that: described downgoing baseband signal processing apparatus comprises: chnnel coding Multiplexing module, interface module, spread spectrum and scrambling module and power control module;
Described channel coding module is finished CRC check, chnnel coding, rate-matched, the insertion of DTX bit, interweave with the first time, transmission channel is multiplexing, interweave for the second time and physical channel shines upon, and mapping result is sent into interface module extract for the spectrum-spreading and scrambling module;
Described interface module is the buffer interface between chnnel coding Multiplexing module and the spectrum-spreading and scrambling module, finishes the asynchronous communication of data between these two modules and the buffer memory of data;
Described spectrum-spreading and scrambling module is finished spread spectrum and the scrambling of base band physical channel, and the extraction of DTX bit and the output of binary system true form;
Described power control module is finished the control of transmitting power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00119764A CN1118975C (en) | 2000-08-24 | 2000-08-24 | Discontinuous emission treating method and device in wideband CDMA system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00119764A CN1118975C (en) | 2000-08-24 | 2000-08-24 | Discontinuous emission treating method and device in wideband CDMA system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1325200A true CN1325200A (en) | 2001-12-05 |
| CN1118975C CN1118975C (en) | 2003-08-20 |
Family
ID=4588000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00119764A Expired - Fee Related CN1118975C (en) | 2000-08-24 | 2000-08-24 | Discontinuous emission treating method and device in wideband CDMA system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1118975C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1327632C (en) * | 2002-12-13 | 2007-07-18 | Lg电子株式会社 | Apparatus for mapping and spreading data symbols in mobile communication systems |
| US7333550B2 (en) | 2002-10-31 | 2008-02-19 | Lg Electronics Inc. | Bit processing method for adaptive multirate modulation |
| CN101072055B (en) * | 2006-05-12 | 2010-06-16 | 中兴通讯股份有限公司 | Downlink power control method at downlink discontinuous transmission for wireless communication system |
| CN102396268A (en) * | 2009-03-04 | 2012-03-28 | 华为技术有限公司 | Method, device and system for sending information |
| CN101312367B (en) * | 2007-05-23 | 2012-05-02 | 鼎桥通信技术有限公司 | Method and apparatus for controlling transmission power during downlink interrupted transmission |
| CN102668411A (en) * | 2009-02-09 | 2012-09-12 | 华为技术有限公司 | Mapping method and device for dtx bits |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2381589B1 (en) * | 2009-02-09 | 2016-10-05 | Huawei Technologies Co., Ltd. | Modulating and mapping method and device for dtx bits |
-
2000
- 2000-08-24 CN CN00119764A patent/CN1118975C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7333550B2 (en) | 2002-10-31 | 2008-02-19 | Lg Electronics Inc. | Bit processing method for adaptive multirate modulation |
| CN1327632C (en) * | 2002-12-13 | 2007-07-18 | Lg电子株式会社 | Apparatus for mapping and spreading data symbols in mobile communication systems |
| CN101072055B (en) * | 2006-05-12 | 2010-06-16 | 中兴通讯股份有限公司 | Downlink power control method at downlink discontinuous transmission for wireless communication system |
| CN101312367B (en) * | 2007-05-23 | 2012-05-02 | 鼎桥通信技术有限公司 | Method and apparatus for controlling transmission power during downlink interrupted transmission |
| CN102668411A (en) * | 2009-02-09 | 2012-09-12 | 华为技术有限公司 | Mapping method and device for dtx bits |
| CN102668411B (en) * | 2009-02-09 | 2014-07-09 | 华为技术有限公司 | Mapping method and device for dtx bits |
| CN102396268A (en) * | 2009-03-04 | 2012-03-28 | 华为技术有限公司 | Method, device and system for sending information |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1118975C (en) | 2003-08-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100425016C (en) | Code division multiple access system | |
| CN1754324A (en) | Application of spreading codes to signals | |
| CN1155164C (en) | Channel estimation in cellular communication system | |
| CN1249090A (en) | Method and arrangement for despreading coded sequence in communication system | |
| CN1118975C (en) | Discontinuous emission treating method and device in wideband CDMA system | |
| CN1369143A (en) | Multibit spread spectrum signalling | |
| JP2734956B2 (en) | PN code synchronization method for spread spectrum | |
| EP1422859A2 (en) | Method and apparatus for a transport format combination indicator (TFCI) decoder | |
| CN101510791A (en) | Transmitting device, modulation method and modulation device for time division radio communication system | |
| CN100373836C (en) | Method and device for eliminating interference in parallel | |
| CN1327632C (en) | Apparatus for mapping and spreading data symbols in mobile communication systems | |
| US6792032B2 (en) | CDMA system transmission matrix coefficient calculation | |
| ITTO20000871A1 (en) | PROCEDURE AND DEVICE FOR THE GENERATION OF CODES, FOR EXAMPLE CODES FOR CDMA APPLICATIONS. | |
| CN101483449A (en) | Multiuser transmission method and transmission apparatus | |
| CN107786296A (en) | A kind of reconstructing method for GOLD sequences | |
| CN101136657B (en) | Transformat combined indication decoding device and method thereof | |
| Rajagopal et al. | On-line arithmetic for detection in digital communication receivers | |
| CN100362762C (en) | An apparatus and method for implementing data signal mode decision | |
| CN1135018C (en) | Method and device for controlling transmitting power of base station in CDMA system | |
| CN201541257U (en) | Serial descrambling and despreading device for mobile communication system | |
| CN1964204A (en) | A decoding optimization method and device to intensify special physical control channel | |
| CN1381998A (en) | Soft nut-of-range switch over in cellular system using different coding rate | |
| CN1299457C (en) | Symbol mapping and channelizing device of asynchronous CDMA communication system | |
| JP2902380B2 (en) | Parallel correlation processing circuit | |
| US6910056B1 (en) | Method and apparatus for implementing a multi-step pseudo random sequence generator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: ZTE CO., LTD. Free format text: FORMER NAME OR ADDRESS: SHENZHENG CITY ZTE CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 518057 Zhongxing building, science and technology south road, Nanshan District hi tech Industrial Park, Guangdong, Shenzhen Patentee after: ZTE Corporation Address before: 518057, Guangdong province Shenzhen Nanshan District hi tech Industrial Park, science and technology south road, ZTE building A block 6 floor of the legal department Patentee before: Zhongxing Communication Co., Ltd., Shenzhen City |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20030820 Termination date: 20140824 |
|
| EXPY | Termination of patent right or utility model |