CN101594223B - Wireless receiving and transmitting method and equipment thereof - Google Patents
Wireless receiving and transmitting method and equipment thereof Download PDFInfo
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Abstract
The invention belongs to the field of wireless communication and discloses a wireless receiving and transmitting method and equipment thereof, which can utilize the same time-frequency source for providing higher channel capacity, wherein multichannel data are loaded in layers with different levels of signal to noise ratios at a transmitting end and received at a receiving end in a mode of serial interference cancellation. The levels of the signal to noise ratios needed by different layers can be realized by controlling the code rate, the modulation mode and the transmitting power magnitude of codes. The data of different layers can belong to different data flows of the same user equipment for realizing multiplexing, can also belong to different user equipment for realizing multiple access and can be acquired by shunting the same data flow. The data needing layered transmission can be firstly randomized.
Description
Technical field
The present invention relates to wireless communication field, particularly the technology of sharing of running time-frequency resource.
Background technology
Wireless communication technology has been brought ambulant facility to people; But radio communication is with respect to wire communication; A main problem is that Radio Resource is limited; Along with people's is surging to the increasing demand of the multimedia application of high bandwidth, and the problem that how to make full use of finite wireless resources also becomes increasingly conspicuous.
In order enough less resources to pass more information; OFDM access (Orthogonal Frequency Multiple Access has appearred in recent years; Abbreviation " OFDMA "), single-carrier frequency division multiple access inserts (Single Carrier-Frequency Division Multiple Access; Be called for short " SC-FDMA ") and the orthogonal frequency division multiplexing multiple access systems such as (Multi-Band OrthogonalFrequency Multiple Access are called for short " MB-OFDMA ") of many subbands.In these systems, system resource is divided into time, is assigned in these time after the information via coded modulation to be transmitted.After receiving terminal is received the time of appointment, can therefrom take out pilot frequency information usually, carry out the data message that processing such as coherent demodulation/channel decoding obtain transmitting then.In these systems, on the time of appointment, only transmit a circuit-switched data, be called the individual layer transmission system.
Fig. 1 shows running time-frequency resource division principle in traditional individual layer transmission system, and wherein, whole time-frequency domain is divided into many time-frequency lattice points.Fig. 1 (a) is illustrated under the ofdma communication mode, and each time-frequency lattice point can be by independent scheduling.Fig. 1 (b) is illustrated under the MB-OFDMA mode, and system is divided into two subbands at frequency domain.Fig. 1 (c) is illustrated in that frequency-region signal is arranged in a subband under the SC-FDMA mode.Here, each the time frequency corresponding a plural degree of freedom.
As can be seen from Figure 1, only transmit one road signal on each plural degree of freedom in traditional communication system, be called one degree of freedom again.Under high s/n ratio (Signal Noise Ratio is called for short " SNR ") situation, this individual layer transmission means is operated in the high SNR working point of channel capacity, and the getable capacity increment of every SNR of increase unit does not seldom have to make full use of valuable Radio Resource.
Summary of the invention
The object of the present invention is to provide a kind of wireless receiving and transmitting method and equipment thereof, can utilize same running time-frequency resource that higher channel capacity is provided.
For solving the problems of the technologies described above, execution mode of the present invention provides a kind of radio communication method, may further comprise the steps:
Generate the data that the N layer has different signal noise ratio level, wherein N is the integer greater than 1;
The N layer data is added up;
Launch after accumulation result being mapped to the running time-frequency resource of appointment.
Execution mode of the present invention also provides a kind of method of wireless reception, may further comprise the steps:
A receives the pending signal of signal as the recurrence first time from the running time-frequency resource of appointment;
B separates to be in harmonious proportion to the best layer data of signal to noise ratio in the current pending signal and deciphers, and obtains the X layer data, and X is the sequence number of the best one deck of current signal to noise ratio;
C adopts the mode identical with transmitting terminal to carry out coded modulation to the X layer data, obtains the coding modulation data of X layer;
D deducts the X layer from current pending signal coding modulation data is as the pending signal of recurrence next time;
Pending signal recurrence to step D gained is carried out above-mentioned steps B, C and D, up to each layer data that obtains appointment.
Execution mode of the present invention also provides a kind of wireless transmission device, comprising:
Layer generation unit is used to generate the data that the N layer has different signal noise ratio level, and wherein N is the integer greater than 1;
The unit that adds up is used for the N layer data that layer generation unit generated is added up;
Map unit is used for the accumulation result of the unit output of adding up is mapped to the running time-frequency resource of appointment;
Transmitter unit is used to launch the signal through the map unit mapping.
Execution mode of the present invention also provides a kind of radio receiver, comprising:
Time-frequency Data Receiving unit is used for receiving the pending signal of signal as the recurrence first time from the running time-frequency resource of appointment;
The hierarchical de-modulating sequencing unit is used for confirming according to the signal to noise ratio of each layer the order of each layer demodulation coding;
The demodulation coding unit is used for the data of current pending signal X layer are separated mediation decoding, obtains the X layer data, and wherein X is the sequence number of the best one deck of the determined current signal to noise ratio of hierarchical de-modulating sequencing unit;
The Interference Cancellation unit; Be used for adopting the mode identical to carry out coded modulation with transmitting terminal to the X layer data of demodulation coding unit output; Obtain the coding modulation data of X layer, and the coding modulation data that from current pending signal, deducts the X layer is as the pending signal of recurrence next time;
Control unit is used to control demodulation coding unit and Interference Cancellation unit and carries out the recurrence processing, up to each layer data that obtains appointment.
Embodiment of the present invention compared with prior art, the main distinction and effect thereof are:
, receive with the counteracting serial interference mode through multichannel data being carried in the different layer of signal noise ratio level at transmitting terminal, under same running time-frequency resource, can pass more information, thereby make full use of channel capacity, promote efficiency of transmission at receiving terminal.
Further; Through code check, modulation system and the transmitting power size of coding are controlled; Can realize the needed signal noise ratio level of different layers, these controlling factors are got up comparatively convenient, can relatively easily the signal noise ratio level of each layer be controlled at the degree of needs.
Further, the data of different layers can belong to the different data streams of same subscriber equipment, thereby it is multiplexing to utilize layer mode to realize.
Further, important data can be by one or more layers best carrying of signal to noise ratio, thereby reduces the significant data probability of errors, realizes the variation of service quality.
Further, the data of different layers can belong to different user equipment, thereby can utilize layer mode to realize that multiple access inserts.
Further, only support the data of the old-fashioned subscriber equipment of individual layer transmission in the best one deck of signal to noise ratio, to transmit, thereby make the system can compatible old-fashioned subscriber equipment, reduce user's upgrade cost.
Further, the data of different layers can be got by same data flow along separate routes, thereby can utilize limited running time-frequency resource to obtain higher transmission speed.
Further; Through data are carried out randomization; Can reduce greatly in the data sequence and continuous 0 or continuous 1 probability to occur, thereby reduce the probability that occurs identical data between the data of different layers continuously, make receiving terminal can carry out more effectively that serial interference is low to disappear.
Further; Through the highest one or more layers of signal to noise ratio encoded with error correcting code; Can when few errors takes place the highest one or more layers of signal to noise ratio, still can obtain correct result, and then these layers can more efficiently be offset, make each lower layer of signal to noise ratio in demodulation coding subsequently, can obtain more correct result through error correction; Reduce number of retransmissions, promote the communication efficiency of whole system.
Further, the multiplexing or multi-access mode of layering can combine with grade other multiplexing or multi-access mode of frequency division, sign indicating number branch, time-division, sky, to obtain higher efficiency of transmission.
Description of drawings
Fig. 1 is running time-frequency resource division principle figure in the existing individual layer transmission system;
Fig. 2 is multilayer communication system running time-frequency resource division principle figure in the embodiment of the present invention;
Fig. 3 is a radio communication method schematic flow sheet in the first embodiment of the invention;
Fig. 4 is a radio communication method schematic flow sheet in the third embodiment of the invention;
Fig. 5 is a method of wireless reception schematic flow sheet in the four embodiment of the invention;
Fig. 6 is a method of wireless reception schematic flow sheet in the sixth embodiment of the invention;
Fig. 7 is a wireless transmission device structural representation in the seventh embodiment of the invention;
Fig. 8 is a wireless transmission device structural representation in the nineth embodiment of the invention;
Fig. 9 is a radio receiver structural representation in the tenth embodiment of the invention;
Figure 10 is a radio receiver structural representation in the twelveth embodiment of the invention.
Embodiment
In following narration, many ins and outs have been proposed in order to make the reader understand the application better.But, persons of ordinary skill in the art may appreciate that even without these ins and outs with based on the many variations and the modification of following each execution mode, also can realize each claim of the application technical scheme required for protection.
For making the object of the invention, technical scheme and advantage clearer, will combine accompanying drawing that execution mode of the present invention is done to describe in detail further below.
The principle of communicating by letter about multilayer in each execution mode of explanation the present invention earlier.
As shown in Figure 2, Fig. 2 (a) is illustrated under the ofdma communication mode, and each time-frequency lattice point can be by independent scheduling, and each time-frequency lattice point has the multi-layer data stack.Fig. 2 (b) is illustrated under the MB-OFDMA mode, and system is divided into two subbands at frequency domain, and the multi-layer data stack is arranged on each subband.Fig. 3 (c) is illustrated in that frequency-region signal is arranged in a subband under the SC-FDMA mode, and the multi-layer data stack is arranged on this subband.Fig. 2 exemplified has been listed three layers of transmission, and more layer can be arranged in the reality, also can have only two-layer.Need the information transmitted data to carry out shunt through after the randomization, the data that shunt to each layer will be encoded respectively, modulate then, and are mapped to the layer of appointment.Each layer is operated in transmission course on the different SNR levels, promptly is operated on the different SNR working point of channel capacity.All things considered, these SNR working points can be less than having only one deck SNR working point in when transmission.Through reducing the SNR working point, increase the transmission number of plies simultaneously, system can transmit multi-layer data on each multiple degree of freedom, increased power system capacity and spectrum efficiency greatly.
At receiving terminal, receiver takes out the pilot signal of each layer correspondence after receiving the time of appointment, then according to the strong and weak of pilot tone or according to each layer data of transmitter named order demodulation coding.When demodulation ground floor data, be regarded as the data of remainder layer to disturb; After demodulating the ground floor data, the recompile modulation recovers the reception signal of ground floor, from total reception signal, removes this restoring signal then.Demodulation second layer data by that analogy, are all come out by demodulation coding up to the data of all layers then.
This Delamination Transmission mode can be used in the point-to-point multiplexing transmission, also can be used in the multiplexing transmission of point-to-multipoint, also can be used in the how point-to-point access transmission.
First execution mode of the present invention relates to the radio communication method of layered reuse.Its flow chart is as shown in Figure 3.
In step 301, the N circuit-switched data is carried out randomization respectively, wherein N is the integer greater than 1.Wherein the N circuit-switched data belongs to the different data streams of same subscriber equipment respectively, thereby realizes the multiplexing of a plurality of data flow.In an example of the present invention, have 5 circuit-switched data, corresponding 5 layers belong to 5 channels of same subscriber equipment respectively.In another example of the present invention, have 3 circuit-switched data, corresponding 3 layers, wherein 1 circuit-switched data belongs to first data flow, and 2 circuit-switched data are that second data flow point road forms in addition.
Randomized purpose is to reduce to occur continuous 0 or continuous 1 probability in the data sequence; The method that adopts has multiple; In an example of the present invention, adopt the mode that data sequence and scrambler are multiplied each other, each circuit-switched data multiply by different scramblers, and scrambler is can predefined pseudo random sequence; In another example of the present invention, adopt the mode that segmentation interweaves to the data sequence, can get several number according to being one section, with predefined order the order of this segment data to be arranged again, each circuit-switched data adopts different interlace modes.In the execution mode of the present invention, the corresponding layer of each circuit-switched data is appreciated that through randomization and can reduces the probability that occurs identical data between the data of different layers continuously, makes receiving terminal can carry out more effectively that serial interference is low to disappear.
After this get into step 302, the N circuit-switched data is encoded independently respectively and modulated.Can encode with error correcting code to the highest one or more layers of signal to noise ratio in when coding; So that when few errors takes place the highest one or more layers of signal to noise ratio, still can obtain correct result, help receiving terminal and carry out more effectively that serial interference is low to disappear through error correction.
After this get into step 303, will multiply by the weight coefficient on this road respectively, generate the data that the N layer has different signal noise ratio level through the N circuit-switched data of coding and modulation.The N circuit-switched data has N weight coefficient corresponding with it respectively, and the heavy coefficient of each right of way is represented transmitting power size relative between the Ge Lu.
After this get into step 304, the N layer data is added up mutually.Data through coding and modulation are normalized, make the different proportion of layer in accumulation result different through multiply by weight coefficient, and the proportion when aloft interface sends in the future in transmitting power is also different.
The main distinction between the different layers is that signal noise ratio level is different, in step 302 and 303, can control the signal noise ratio level of each layer through one of following factor or its combination in any:
The weight coefficient of the relative transmitting power size of code check size, modulation system, the representative of coding.
These controlling factors are got up comparatively convenient, can relatively easily the SNR level of each layer be controlled at the degree of needs.
In an example of the present invention, the encoder bit rate of each layer is the same with modulation system, but weight coefficient is different.At this moment, the layer that weight coefficient is big has higher signal noise ratio level, and the layer that weight coefficient is little has lower signal noise ratio level.
In another example of the present invention; Have 3 layer data; Each layer weight coefficient identical (step 303 can be omitted in this example); The 1st layer encoder bit rate is that 1/4F, modulation system are BPSK, and the 2nd layer encoder bit rate is that 1/4F, modulation system are QPSK, and the 3rd layer encoder bit rate is that 1/2F, modulation system are QPSK.Wherein F represents specific code check, and BPSK representes binary phase shift keying (BinaryPhase Shift Keying), and QPSK representes quadrature conversion phase key (Quadrature Phase shiftKeying).Wherein encoder bit rate is low more, and coding gain is high more, and the signal to noise ratio of BPSK transmission data is higher than the signal to noise ratio of QPSK transmission data behind the demodulation coding of equal value.Although therefore 3 layers transmitting power is identical, because encoder bit rate is different with modulation system, the 1st layer to the 3rd layer working point signal to noise ratio is successively decreased successively.
After this get into step 305, accumulation result is mapped to the running time-frequency resource of appointment.Running time-frequency resource can be the time-frequency piece, also can be subband.
After this get into step 306,, be transformed into time-domain signal again for inserting pilot tone through mapped data.The data conversion that can adopt reverse FFT (Inverse Fast Transform is called for short " IFFT ") will contain pilot tone becomes time-domain signal.
After this get into step 307, the time-domain signal of interface emission aloft.
Because each layer data has different signal to noise ratios, and signal to noise ratio higher data probability of errors is lower, can be with important data by one or more layers best carrying of signal to noise ratio, thus reduce the significant data probability of errors, realize the variation of service quality.In an example of the present invention; Each circuit-switched data belongs to visual telephone service; Wherein the audio data stream of visual telephone service transmits in the best one deck of signal to noise ratio, transmission in the video data stream of visual telephone service other each layer outside the best one deck of signal to noise ratio.In another example of the present invention, comprise control channel and data channel in the system, wherein the data of control channel are transmitted in the best one deck of signal to noise ratio, transmission in the data of data channel other each layer outside the best one deck of signal to noise ratio.
Certainly, each layer data also can not distinguished importance, makes no exception.
As time division multiplexing and frequency division multiplexing combine suchly, the multiplex mode of layering can combine with grade other multiplex mode of frequency division, sign indicating number branch, time-division, sky, to obtain higher efficiency of transmission.Different layers can become a multiplexing dimension.For example, the various combination of different time-frequency piece, different spreading code and different layer can carry different data flow respectively.
Second execution mode of the present invention relates to the radio communication method that the layering multiple access inserts.Second execution mode and first execution mode are roughly the same; Difference mainly is: the N circuit-switched data of first execution mode belongs to the different data streams of same subscriber equipment respectively; And the N circuit-switched data of second execution mode belongs to different user equipment respectively, thereby has realized the multiple access access.In an example of the present invention, have 4 circuit-switched data, corresponding 4 layers belong to 4 subscriber equipmenies respectively.In another example of the present invention, have 3 circuit-switched data, corresponding 3 layers, wherein 1 circuit-switched data belongs to first subscriber equipment, and 2 circuit-switched data belong to two data flow of second subscriber equipment in addition.
For the old-fashioned subscriber equipment of only supporting individual layer transmission, its data can be transmitted in the best one deck of signal to noise ratio, thereby make the system with multilayer transfer function can compatible old-fashioned subscriber equipment, reduce user's upgrade cost.
As time division multiple access and frequency division multiple access combine suchly, the multi-access mode of layering can combine with grade other multi-access mode of frequency division, sign indicating number branch, time-division, sky, to obtain higher efficiency of transmission.Different layers can become a dimension that realizes multiple access.For example, the various combination of different time-frequency piece, different spreading code and the different layer data that can carry different user devices respectively.
The 3rd execution mode of the present invention relates to point-to-point radio communication method, and its flow process is as shown in Figure 4.The 3rd execution mode is and the corresponding method of reseptance of first execution mode.
Step 401 is identical on randomized mode with step 301 in first execution mode, but different on randomized object.In the step 401 a data stream is carried out randomization, respectively the N circuit-switched data is not carried out randomization and do not resemble in step 301.
After this getting into step 402, is the N road with a data flow point.Can be to divide equally, also can carry out shunt by certain proportionate relationship.Through same data flow is divided into the N road, transmission in N layer respectively can utilize limited running time-frequency resource to obtain higher transmission speed.
Step 403 after this to 408 respectively with first execution mode in step 302 to 307 identical, do not giving unnecessary details here.
The 4th execution mode of the present invention relates to the method for wireless reception of layered reuse.Its flow process is as shown in Figure 5.This execution mode adopts the mode of counteracting serial interference to receive the data of each layer.Each layer data belongs to the different data streams of same subscriber equipment.The 4th execution mode is and the corresponding method of reseptance of first execution mode.
In step 501, receive time-domain signal from air interface, and time-domain signal is transformed into frequency-region signal.Can use fast Fourier transform (Fast Fourier Transform is called for short " FFT ") that time-domain signal is transformed into frequency-region signal.
After this get into step 502, from the running time-frequency resource reception signal of appointment.This execution mode uses recursive mode to handle, and the signal that receives from the running time-frequency resource of appointment is as the pending signal of the recurrence first time.
After this get into step 503, the best layer data of signal to noise ratio in the current pending signal is separated to be in harmonious proportion decipher, obtain the X layer data, X is the sequence number of the best one deck of current signal to noise ratio.The signal to noise ratio of supposing ground floor is the highest, and the second layer occupies time, and the 3rd layer is once more ..., so,, obtain the ground floor data in first time during execution in step 503, during execution in step 503, obtain second layer data for the second time ..., by that analogy.When demodulation X layer, the data of current other layer that does not also solve all are regarded as interference.
In an example of the present invention, according to the strong and weak definite best one deck of signal to noise ratio of the pilot tone of each layer.Pilot tone can be extracted from the signal that step 502 obtained.The benefit of this way is that receiving terminal is adaptive, need not receive extra supplementary from transmitting terminal.
In another example of the present invention, confirm one deck that signal to noise ratio is best according to the transmitting terminal named order.Transmitting terminal can send a signaling to receiving terminal in advance, comprising the information of from high to low each of expression signal to noise ratio layer order.The benefit of this way is the work of having saved receiving terminal analysis pilot tone.
If the highest one or more layers of signal to noise ratio encoded with error correcting code at transmitting terminal; Then, receiving terminal also to carry out corresponding error-correcting decoding when deciphering; Use error correcting code can make the highest one or more layers of signal to noise ratio when few errors takes place, still can obtain correct result through error correction; And then these layers can more efficiently be offset; Each layer that signal to noise ratio is lower can obtain more correct result in demodulation coding subsequently, reduce number of retransmissions, thereby promotes the communication efficiency of whole system.
After this get into step 504, judge whether that each layer data of appointment all obtains,, otherwise get into step 505 if all then got into step 507.In this execution mode,,, that is to say to have only after all layers are all separated mediation decoding just can get into step 507 so each layer all will solve usually because each layer data is the different data streams that belongs to same subscriber equipment.
In step 505, adopt the mode identical to carry out coded modulation to the X layer data that has just been solved with transmitting terminal, obtain the coding modulation data of X layer.
After this get into step 506, the coding modulation data that from current pending signal, deducts the X layer is as the pending signal of recurrence next time.After this get back to step 503, carry out the recurrence of next round and handle.The processing mode of each recurrence is identical, but pending signal is different, and each recurrence all can be eliminated the influence of the maximum one deck of signal to noise ratio from current pending signal.
In step 507, each layer data that solves is gone randomized processing.Going randomization is randomized inverse process in the step 301, is used to eliminate randomized influence.
Receiving terminal receives with the counteracting serial interference mode, under same running time-frequency resource, can pass more information, makes full use of channel capacity, promotes efficiency of transmission.
The 5th execution mode of the present invention relates to the method for wireless reception that multiple access inserts.The 5th execution mode is and the corresponding method of reseptance of second execution mode.The 5th execution mode and the 4th execution mode are roughly the same; The main distinction is: the N circuit-switched data of first execution mode belongs to the different data streams of same subscriber equipment respectively; And the N circuit-switched data of second execution mode belongs to different user equipment respectively, thereby has realized the multiple access access.
In the step 504 of the 4th execution mode; The data that need obtain all layers usually could finish to separate to be in harmonious proportion to be deciphered; And in the 5th execution mode; Because one deck or which floor subscriber equipment possibly only have in the N layer, so as long as one deck that this subscriber equipment had or which floor have all just been solved and can get into step 507.
Special, for the subscriber equipment that does not have complicated receiving ability, can receive only the best ground floor data of signal to noise ratio, do not use the Interference Cancellation function.Other subscriber equipmenies with complicated receiving ability can at other which floor transmitting data.
The 6th execution mode of the present invention relates to point-to-point method of wireless reception, and its flow process is as shown in Figure 6.The 6th execution mode is and the corresponding method of reseptance of the 3rd execution mode.Each layer data of appointment belongs to same data flow in the 6th execution mode.
Step 601 to step 606 is identical with step 501 to step 506, repeats no more here.
In step 607, each layer data of the appointment that has solved is closed the road.Because a plurality of layers of carrying of appointment is the different piece of same data flow, to be combined into one the tunnel so separate each the road result who is in harmonious proportion after deciphering.
In step 608, the data on ECDC road are gone randomization.
Method execution mode of the present invention can be realized with software, hardware, firmware or the like mode.No matter the present invention be with software, hardware, or the firmware mode realize; Instruction code can be stored in the memory of computer-accessible of any kind (for example permanent or revisable; Volatibility or non-volatile; Solid-state or non-solid-state, medium fixing or that change or the like).Equally; Memory can for example be programmable logic array (Programmable Array Logic; Abbreviation " PAL "), random access memory (Random Access Memory; Abbreviation " RAM "), programmable read only memory (Programmable Read Only Memory is called for short " PROM "), read-only memory (Read-Only Memory is called for short " ROM "), Electrically Erasable Read Only Memory (Electrically Erasable Programmable ROM; Abbreviation " EEPROM "), disk, CD, digital versatile disc (Digital Versatile Disc is called for short " DVD ") or the like.
The 7th execution mode of the present invention relates to a kind of wireless transmission device of layered reuse, and its structure is as shown in Figure 7.This equipment comprises:
Sending controling unit 701 is used for the process of transmitting of entire equipment is controlled.
Randomization unit 702 is used for the N circuit-switched data is carried out outputing to coded modulation unit 704 after the randomization.In this execution mode, the N circuit-switched data belongs to the different data streams of same subscriber equipment.
There is N coded modulation unit 704, is respectively applied for the N circuit-switched data is encoded independently and modulated.
Weighted accumulation unit 705; Be used for the N circuit-switched data of handling through each coded modulation unit 704 multiply by the weight coefficient on this road respectively; The data that generation N layer has different signal noise ratio level add up again, and wherein the weight coefficient on each road is represented transmitting power size relative between the Ge Lu.Weighted accumulation unit 705 can be realized in a physical location; Also can divide in two physical locations and realize; In an example of the present invention; Weighted accumulation unit 705 is divided into weighted units and adds up two parts in unit, and weighted units is accomplished the multiplication function of weight coefficient, and the N layer data that the unit that adds up is exported weighted units adds up.
Map unit 706 is used for the accumulation result of weighted accumulation unit 705 output is mapped to the running time-frequency resource of appointment.
Time-domain signal generation unit 707 is used for output result to map unit 706 and carries out the IFFT conversion and generate time-domain signal and deliver to transmitter unit 708.
Transmitter unit 708, being used for aloft, interface transmits.
Pilot generation unit 709 is used to each layer generation pilot tone, and is mapped to the running time-frequency resource of appointment by map unit 706 with the output result of weighted accumulation unit 705.
The related equipment of this execution mode can be used for accomplishing the method flow that first execution mode is mentioned.Therefore all ins and outs of mentioning in the first embodiment are still effective in this execution mode, in order to reduce repetition, repeat no more here.
The 8th execution mode of the present invention relates to the wireless transmission device that a kind of layering multiple access inserts.The 8th execution mode and the 7th execution mode are roughly the same; Difference mainly is: the N circuit-switched data of input randomization unit 702 belongs to the different data streams of same subscriber equipment respectively in the 7th execution mode; And the N circuit-switched data of the 8th execution mode belongs to different user equipment respectively, thereby has realized the multiple access access.
The related equipment of this execution mode can be used for accomplishing the method flow that second execution mode is mentioned.Therefore all ins and outs of in second execution mode, mentioning are still effective in this execution mode, in order to reduce repetition, repeat no more here.
The 9th execution mode of the present invention relates to a kind of point-to-point wireless transmission device, and its structure is as shown in Figure 8.In this transmitting apparatus, unit 801,804-809, respectively with the 7th execution mode in unit 701,704-709 identical.
Branching unit 803 is used for 802 outputs, one circuit-switched data in randomization unit is divided into the N road, and every road outputs to a coded modulation unit 804 respectively.
The related equipment of this execution mode can be used for accomplishing the method flow that the 3rd execution mode is mentioned.Therefore all ins and outs of in the 3rd execution mode, mentioning are still effective in this execution mode, in order to reduce repetition, repeat no more here.
The tenth execution mode of the present invention relates to a kind of radio receiver of layered reuse.The tenth execution mode is and the corresponding receiving equipment of the 7th execution mode.This receiving equipment comprises:
Time-domain signal receiving element 902 is used to receive time-domain signal, and converts the time-domain signal of receiving to frequency-region signal through the FFT conversion, outputs to time-frequency Data Receiving unit 903;
Time-frequency Data Receiving unit 903 is used for receiving the pending signal of signal as the recurrence first time from the running time-frequency resource of appointment.
Hierarchical de-modulating sequencing unit 905 is used for confirming according to the signal to noise ratio of each layer the order of each layer demodulation coding.The order of each layer demodulation coding can perhaps be confirmed according to the strong and weak order of confirming each layer demodulation coding of the pilot tone of each layer in this unit according to the transmitting terminal named order.
Go to randomization unit 909, be used for each circuit-switched data of demodulation coding unit 907 outputs is gone randomization.
In an example of the present invention; In the frame of broken lines 910; Demodulation coding unit 907 is N, and Interference Cancellation unit 906 is N-1, under the control of control unit 901; Each demodulation coding unit 907 is respectively a layer and separates mediation decoding, and each Interference Cancellation unit 906 is handled a layer outside last one deck respectively.The benefit of this implementation is that each demodulation coding unit 907 is handled one deck with 906 of Interference Cancellation unit, can improve the efficient of processing through the mode of streamline.
In another example of the present invention, in the frame of broken lines 910, demodulation coding unit 907 respectively is one with Interference Cancellation unit 906, and control unit 901 is realized the recurrence processing through calling these two unit repeatedly.The benefit of this implementation is that hardware cost is lower, and can adapt to number of plies condition of different easily.
The related equipment of this execution mode can be used for accomplishing the method flow that the 4th execution mode is mentioned.Therefore all ins and outs of in the 4th execution mode, mentioning are still effective in this execution mode, in order to reduce repetition, repeat no more here.
The 11 execution mode of the present invention relates to the radio receiver that a kind of layering multiple access inserts.The 11 execution mode is and the corresponding receiving equipment of the 8th execution mode.
The 11 execution mode of the present invention relates to the wireless transmission device that a kind of layering multiple access inserts.The 11 execution mode and the tenth execution mode are roughly the same; Difference mainly is: the N circuit-switched data of demodulation coding unit 907 outputs belongs to the different data streams of same subscriber equipment respectively in the tenth execution mode; And the N circuit-switched data of the 11 execution mode belongs to different user equipment respectively, thereby has realized the multiple access access.
The related equipment of this execution mode can be used for accomplishing the method flow that the 5th execution mode is mentioned.Therefore all ins and outs of in the 5th execution mode, mentioning are still effective in this execution mode, in order to reduce repetition, repeat no more here.
The 12 execution mode of the present invention relates to a kind of point-to-point radio receiver.The 12 execution mode is and the corresponding receiving equipment of the 9th execution mode.The structure of this receiving equipment is shown in figure 10, and wherein unit 1001-1007 is identical with 901-907 respectively, repeats no more here.
This receiving equipment also comprises:
Go to randomization unit 1009, be used for a circuit-switched data of combiner unit 1008 outputs is gone randomization.
The related equipment of this execution mode can be used for accomplishing the method flow that the 6th execution mode is mentioned.Therefore all ins and outs of in the 6th execution mode, mentioning are still effective in this execution mode, in order to reduce repetition, repeat no more here.
Need to prove; Each unit of mentioning in each equipment execution mode of the present invention all is a logical block, and physically, a logical block can be a physical location; It also can be the part of a physical location; Can also realize that the physics realization mode of these logical blocks itself is not most important with the combination of a plurality of physical locations, the combination of the function that these logical blocks realized is the key that just solves technical problem proposed by the invention.In addition, for outstanding innovation part of the present invention, above-mentioned each the equipment execution mode of the present invention will not introduced with solving the not too close unit of technical problem relation proposed by the invention, and this does not show that there is not other unit in the said equipment execution mode
Though through reference some preferred implementation of the present invention; The present invention is illustrated and describes; But those of ordinary skill in the art should be understood that and can do various changes to it in form with on the details, and without departing from the spirit and scope of the present invention.
Claims (24)
1. a radio communication method is characterized in that, may further comprise the steps:
Generate the data that the N layer has different signal noise ratio level, each layer data has different signal to noise ratios, and wherein N is the integer greater than 1;
The N layer data is added up;
Launch after accumulation result being mapped to the running time-frequency resource of appointment.
2. radio communication method according to claim 1 is characterized in that, the step that said generation N layer has the data of different signal noise ratio level comprises following substep:
The N circuit-switched data is encoded independently respectively and modulated;
To multiply by the weight coefficient on this road respectively through the N of said coding and modulation circuit-switched data, and generate the data that the N layer has different signal noise ratio level, wherein the weight coefficient on each road is represented transmitting power size relative between the Ge Lu;
Signal noise ratio level through each layer of one of following factor or its combination in any control in above-mentioned substep:
The said weight coefficient of the modulation system of the code check size of said coding, said modulation, the relative transmitting power size of representative.
3. radio communication method according to claim 2 is characterized in that said N circuit-switched data belongs to the different data streams of same subscriber equipment respectively.
4. radio communication method according to claim 3 is characterized in that, of paramount importance one the tunnel transmits in the best one deck of signal to noise ratio in the said N circuit-switched data.
5. radio communication method according to claim 2 is characterized in that, said N circuit-switched data belongs to different user equipment respectively.
6. radio communication method according to claim 5 is characterized in that, only supports the data of the subscriber equipment of individual layer transmission in the best one deck of signal to noise ratio, to transmit.
7. radio communication method according to claim 2 is characterized in that, has before the step of data of different signal noise ratio level further comprising the steps of at said generation N layer:
The data of same data flow are divided into the N road.
8. according to each described radio communication method in the claim 3 to 7, it is characterized in that, before the step of said coding and modulation, also comprise data are carried out randomized step.
9. radio communication method according to claim 8 is characterized in that, and is further comprising the steps of after the step of the said running time-frequency resource that accumulation result is mapped to appointment:
For inserting pilot tone, carry out reverse FFT again and generate time-domain signal through mapped data.
10. radio communication method according to claim 9 is characterized in that, the M layer data that signal to noise ratio is higher is encoded with error correcting code, wherein 0＜M＜N.
11. a method of wireless reception is characterized in that, may further comprise the steps:
A receives the pending signal of signal as the recurrence first time from the running time-frequency resource of appointment;
B separates to be in harmonious proportion to the best layer data of signal to noise ratio in the current pending signal and deciphers, and obtains the X layer data, and X is the sequence number of the best one deck of current signal to noise ratio;
C adopts the mode identical with transmitting terminal to carry out coded modulation to the X layer data, obtains the coding modulation data of X layer;
D deducts the X layer from current pending signal coding modulation data is as the pending signal of recurrence next time;
Pending signal recurrence to step D gained is carried out above-mentioned steps B, C and D, up to each layer data that obtains appointment.
12. method of wireless reception according to claim 11 is characterized in that, among the said step B, according to the strong and weak definite best one deck of current signal to noise ratio of the pilot tone of each layer, perhaps confirms one deck that current signal to noise ratio is best according to the transmitting terminal named order.
13. method of wireless reception according to claim 12 is characterized in that, obtains after each layer data of appointment, said method also comprises goes randomized step to each layer data of appointment;
Before the running time-frequency resource from appointment receives signal, also comprise the step of the time-domain signal of receiving being carried out fast Fourier transform.
14. method of wireless reception according to claim 13 is characterized in that, each layer data of said appointment belongs to same data flow, and said method also comprises the step with each layer data synthetic a tunnel of said appointment.
15. a wireless transmission device is characterized in that, comprising:
Layer generation unit is used to generate the data that the N layer has different signal noise ratio level, and each layer data has different signal to noise ratios, and wherein N is the integer greater than 1;
The unit that adds up is used for the said layer N layer data that generation unit generated added up;
Map unit is used for the accumulation result of the said unit output of adding up is mapped to the running time-frequency resource of appointment;
Transmitter unit is used to launch the signal through said map unit mapping.
16. wireless transmission device according to claim 15 is characterized in that, said layer generation unit further comprises following subelement:
N coded modulation unit is used for the N circuit-switched data is encoded independently respectively and modulated;
Weighted units is used for generating the data that the N layer has different signal noise ratio level to multiply by the weight coefficient on this road respectively through the N of each said coded modulation cell processing circuit-switched data, and wherein the weight coefficient on each road is represented transmitting power size relative between the Ge Lu;
In said coded modulation unit and weighted units, control the signal noise ratio level of each layer through one of following factor or its combination in any:
The said weight coefficient of the modulation system of the code check size of said coding, said modulation, the relative transmitting power size of representative.
17. wireless transmission device according to claim 16 is characterized in that, also comprises:
The randomization unit is used for data are carried out outputing to said coded modulation unit after the randomization;
Pilot generation unit is used to each layer generation pilot tone, and is mapped to the running time-frequency resource of appointment by said map unit with the output result of the said unit that adds up;
The time frequency signal generation unit is used for output result to said map unit and carries out reverse FFT and generate time-domain signal and deliver to said transmitter unit.
18. wireless transmission device according to claim 17 is characterized in that, also comprises:
Branching unit, a data flow point that is used for input is the N road, every road outputs to a said coded modulation unit.
19. a radio receiver is characterized in that, comprising:
Time-frequency Data Receiving unit is used for receiving the pending signal of signal as the recurrence first time from the running time-frequency resource of appointment;
The hierarchical de-modulating sequencing unit is used for confirming according to the signal to noise ratio of each layer the order of each layer demodulation coding;
The demodulation coding unit is used for the data of current pending signal X layer are separated mediation decoding, obtains the X layer data, and wherein X is the sequence number of the best one deck of the determined current signal to noise ratio of said hierarchical de-modulating sequencing unit;
The Interference Cancellation unit; Be used for adopting the mode identical to carry out coded modulation with transmitting terminal to the X layer data of said demodulation coding unit output; Obtain the coding modulation data of X layer, and the coding modulation data that from current pending signal, deducts the X layer is as the pending signal of recurrence next time;
Control unit is used to control said demodulation coding unit and Interference Cancellation unit and carries out the recurrence processing, up to each layer data that obtains appointment.
20. radio receiver according to claim 19 is characterized in that, said hierarchical de-modulating sequencing unit is perhaps confirmed the order of each layer demodulation coding according to the strong and weak order of confirming each layer demodulation coding of the pilot tone of each layer according to the transmitting terminal named order.
21. radio receiver according to claim 20 is characterized in that, also comprises:
The time-domain signal receiving element is used to receive time-domain signal, and converts the time-domain signal of receiving to frequency-region signal through FFT, outputs to said time-frequency Data Receiving unit;
Pilot extraction unit is used for extracting pilot signal from the signal that said time-frequency Data Receiving unit is received, outputs to said demodulation coding unit, supplies said demodulation coding unit when separating mediation decoding, to use;
Go to the randomization unit, be used for going randomization through the data of separating mediation decoding.
22. radio receiver according to claim 21 is characterized in that, also comprises:
Combiner unit is used for N layer data of said demodulation coding unit output are combined into one the tunnel.
23. radio receiver according to claim 22 is characterized in that, said demodulation coding unit and Interference Cancellation unit respectively are one, and said control unit is realized said recurrence processing through calling these two unit repeatedly.
24. radio receiver according to claim 22; It is characterized in that; Said demodulation coding unit is N, and said Interference Cancellation unit is N-1, under the control of said control unit; Each said demodulation coding unit is respectively a layer and separates mediation decoding, and each said Interference Cancellation unit is handled a layer outside last one deck respectively.
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| WO2006069397A2 (en) * | 2004-12-22 | 2006-06-29 | Qualcomm Incorporated | Capacity based rank prediction for mimo design |
| CN101124760A (en) * | 2004-12-22 | 2008-02-13 | 高通股份有限公司 | Performance based rank prediction for MIMO design |
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| CN101124760A (en) * | 2004-12-22 | 2008-02-13 | 高通股份有限公司 | Performance based rank prediction for MIMO design |
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