CN101557373A - Method and device for transmitting and receiving signals based on subbands - Google Patents
Method and device for transmitting and receiving signals based on subbands Download PDFInfo
- Publication number
- CN101557373A CN101557373A CNA2008100432315A CN200810043231A CN101557373A CN 101557373 A CN101557373 A CN 101557373A CN A2008100432315 A CNA2008100432315 A CN A2008100432315A CN 200810043231 A CN200810043231 A CN 200810043231A CN 101557373 A CN101557373 A CN 101557373A
- Authority
- CN
- China
- Prior art keywords
- subband
- bandwidth
- receiver
- signal
- data message
- 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
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000012545 processing Methods 0.000 claims abstract description 51
- 238000006243 chemical reaction Methods 0.000 claims abstract description 32
- 238000001914 filtration Methods 0.000 claims description 28
- 125000004122 cyclic group Chemical group 0.000 claims description 20
- 230000007704 transition Effects 0.000 claims description 9
- 230000005764 inhibitory process Effects 0.000 claims description 6
- 230000004044 response Effects 0.000 claims description 5
- 238000012958 reprocessing Methods 0.000 claims description 4
- 238000005070 sampling Methods 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims 1
- 238000013507 mapping Methods 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 abstract description 23
- 238000004891 communication Methods 0.000 abstract description 3
- 230000008054 signal transmission Effects 0.000 abstract description 3
- 230000002401 inhibitory effect Effects 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000010295 mobile communication Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Images
Classifications
-
- Y02B60/50—
Abstract
The invention belongs to the field of wireless communication and discloses a method and a device for transmitting and receiving signals based on subbands. In the invention, by inhibiting signals outside an overall bandwidth of useful subcarrier waves and inside a transmission bandwidth of a sender before base-band processing, a receiver is not required to use the same bandwidth as the sender and can correctly receive the information to be transmitted by the sender to the receiver, thereby the demand on the processing capability of parts such as the radio frequency of the receiver, the analog-to-digital conversion, the baseband, and the like is lowered, the power consumption is reduced and the cost is saved. In addition, as the bandwidth of the subbands is wider than the bandwidth of the subcarrier waves, the subbands are less than the subcarrier waves and each subband is modulated by a single subcarrier wave, and the peak-to-average ratio of the signal transmission can be reduced.
Description
Technical field
The present invention relates to wireless communication field, particularly based on the wireless communication technology of subband.
Background technology
Traditional frequency multiplexing technique is that data are only transmitted on a carrier signal, OFDM (Orthogonal Frequency Division Multiplexing, be called for short " OFDM ") be a kind of multi-carrier modulation (Multi-Carrier Modulation, be called for short " MCM "), it adopts a plurality of carrier waves, and the data flow that will transmit resolves into the bit stream of a plurality of low speed, removes to modulate a plurality of carrier waves respectively with the data flow of these low speed.If these carrier waves are selected for use with the frequency hopping mode, even if so the mutual aliasing of frequency spectrum also to keep be mutually orthogonal waveform.So just avoid the interference between the signal waveform, also improved the availability of frequency spectrum simultaneously.
The OFDM technology has been acknowledged as the first-selected transmission technology of super three generations and four-tape WiMAX mobile communication, basic enterprising line frequency in the OFDM technology divides multiple access (Frequency Division MultipleAccess, be called for short " FDMA ") multiplexing, just constituted OFDM access (OrthogonalFrequency Multiple Access is called for short " OFDMA ") technology.In being 6726297 patent, U.S. Patent number discloses a kind of typical OFDMA transmitting device and method.
In the existing mobile radio system, the transmission bandwidth of transceiver is symmetrical on the transmission link, and promptly the transmission bandwidth of the transmission bandwidth of sender and receiver equates.This symmetrical structure requires receiver to have the broadband disposal ability the same with sender.The OFDMA technology also is the same, and receiver need receive the signal in the whole transmission bandwidth, partly takes out useful part in Base-Band Processing, abandons the data of nonuseable part.
In super three generations such as OFDMA and following the 4th third-generation mobile communication system, in order to satisfy the needs of hardware circuit solution, the individual channel frequency domain bandwidth has reached 20MHz, and is expected to reach 100MHz.Wide like this transmission band is too high to the requirement of function and cost for some data rates require lower scene and node.
For OFDMA, receiver needs at first to receive the interior signal of whole transmission bandwidth down, transforms to and just can distinguish in the baseband signal own useful signal section.Like this to needing the less receiver of message transmission rate also to propose very high radio frequency and base band front end such as analog-to-digital conversion, fast Fourier transform Capability Requirements such as (Fast Fourier Transform are called for short " FFT ").
In addition, in the OFDM/OFDMA system, because each transmission link all includes a plurality of subcarriers, manufacture under the situation of particular restriction at branch not subcarrier, the peak-to-average force ratio of transmission signals is higher, badly influence the efficient of sender power amplifier, and receiver and transmitter radio frequency (Radio Frequency, be called for short " RF ") path, sender digital to analog converter (Digital Analog Converter, be called for short " DAC ") and receiver analog to digital converter (Analog Digital Converter, abbreviation " ADC ") dynamic range, power efficiency is lower, the frequency deviation sensitivity.
Summary of the invention
The object of the present invention is to provide a kind of signal transmit-receive method and equipment, can reduce needing of the disposal ability requirement of the less receiver of message transmission rate at radio frequency processing and base band front end based on subband.
For solving the problems of the technologies described above, embodiments of the present invention provide a kind of method for receiving and processing signal based on subband, may further comprise the steps:
Receive the signal that sender is launched;
Before Base-Band Processing, outside the total bandwidth to useful subband, signal within the transmitted bandwidth of sender suppresses, wherein the total bandwidth of useful subband is less than transmitted bandwidth, the subband that has a plurality of frequency domain quadratures in the transmitted bandwidth and adopt the single carrier mode to modulate, the symbol of each subband includes a data message part and a Cyclic Prefix that shields, each data message partly comprises at least one data message, wherein the data message of at least one subband partly comprises at least two data messages, and data message part and Cyclic Prefix align respectively in time domain between each subband;
Signal through suppressing is carried out Base-Band Processing.
Embodiments of the present invention also provide a kind of signal transmitting method based on subband, may further comprise the steps:
Reception bandwidth according to receiver, on the data-modulated that needs is sent to this receiver each subband within this receiver receiving belt wide region, this receiver receives the transmitted bandwidth of bandwidth less than sender, the subband that has a plurality of frequency domain quadratures in the transmitted bandwidth and adopt the single carrier mode to modulate, the symbol of each subband includes a data message part and a Cyclic Prefix that shields, each data message partly comprises at least one data message, wherein the data message of at least one subband partly comprises at least two data messages, and data message part and Cyclic Prefix align respectively in time domain between each subband;
Each subband that will belong to receiver is launched simultaneously with the subband that belongs to other receiver.
Embodiments of the present invention also provide a kind of receiver, comprising:
Antenna is used to receive the signal that sender is launched;
Baseband processing unit is used to carry out Base-Band Processing, it is characterized in that, also comprises:
Suppress the unit; be used for before Base-Band Processing; outside the total bandwidth to useful subband; signal within the transmitted bandwidth of sender suppresses; wherein the total bandwidth of useful subband is less than transmitted bandwidth; the subband that has a plurality of frequency domain quadratures in the transmitted bandwidth and adopt the single carrier mode to modulate; the symbol of each subband includes a data message part and a Cyclic Prefix that shields; each data message partly comprises at least one data message; wherein the data message of at least one subband partly comprises at least two data messages, and data message part and Cyclic Prefix align respectively in time domain between each subband.
Embodiments of the present invention also provide a kind of sender, comprise
Modulating unit, be used for reception bandwidth according to receiver, on the data-modulated that needs is sent to this receiver each subband within this receiver receiving belt wide region, this receiver receives the transmitted bandwidth of bandwidth less than sender, each subband frequency domain quadrature each other wherein, each subband adopts the single carrier mode to modulate, the symbol of each subband includes a data message part and a Cyclic Prefix that shields, each data message partly comprises at least one data message, wherein the data message of at least one subband partly comprises at least two data messages, and data message part and Cyclic Prefix align respectively in time domain between each subband;
Transmitter unit is used for each subband that belongs to receiver through the modulating unit modulation is launched simultaneously with the subband that belongs to other receiver.
Embodiment of the present invention compared with prior art, the main distinction and effect thereof are:
By suppressing at the signal outside the total bandwidth to useful subcarrier before the Base-Band Processing, within the transmitted bandwidth of sender, needn't require receiver to use the bandwidth identical just can correctly receive the information that sender will be transferred to receiver with sender, thereby reduced the disposal ability requirement of the parts such as radio frequency, analog-to-digital conversion, base band of receiver, reduced power consumption, provided cost savings.
In addition, because subband bandwidth ratio subcarrier bandwidth is thicker, number of sub-bands is lacked than number of sub carrier wave, and is single-carrier modulated on each subband, can reduce the peak-to-average force ratio of transmission signals.Thicker subband bandwidth made things convenient for system send and frequency acceptance band with the subband boundary alignment, reduce the processing complexity; Thicker subband bandwidth makes system insensitive to frequency error simultaneously.
Further, the inhibition that signal outside the total bandwidth to useful subcarrier, within the transmitted bandwidth of sender carries out can realize by the bandpass filtering mode, the for example analog bandpass filtering before the equivalence of the radio frequency path before analog-to-digital conversion bandpass filtering, the analog-to-digital conversion, the numeric field bandpass filtering after the analog-to-digital conversion etc., realize comparatively flexible, above-mentioned several filtering can also combine, thereby makes the effect of filtering more remarkable.
Further, the sample frequency after the filtering should satisfy Fs 〉=BW+BW1, and wherein Fs is a sample frequency, and BW is the pass band width of filter, and BW1 is the transition band bandwidth that passband both sides amplitude-frequency response descends gradually.The image signal of having an opportunity to be aliased into useful signal frequency band BW all is in the stopband of filter, has guaranteed that useful signal is not disturbed by aliasing signal.
Description of drawings
Fig. 1 is that the broadband based on subband in the embodiment of the present invention sends narrow-band reception transmission plan schematic diagram;
Fig. 2 is that the broadband based on subband sends narrow-band reception transmission method flow chart in the first embodiment of the invention;
Fig. 3 is that the broadband based on subband sends narrow-band reception transmission method flow chart in the second embodiment of the invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, embodiments of the present invention are described in further detail below in conjunction with accompanying drawing.
Basic principle of the present invention is described earlier.The broadband that Fig. 1 has provided based on subband sends narrow-band reception transmission plan schematic diagram; Fig. 1 (a) has provided the aerial signal that is transferred to the receiver rf receiver unit, and wherein useful signal has taken a plurality of subbands, and total bandwidth is BW; Fig. 1 (b) has provided passband, transition band and the stopband characteristic of anti-aliased (anti-aliasing) filter of analog to digital converter (ADC) analog domain before or filter of equal value; The passband of noticing filter is BW, and the passband both sides are the transition band of filter, and the monolateral bandwidth of transition band is 2*BW1; Transition band is outward the stopband of filter; It is the signal spectrum figure of numeric field after the ADC of Fs that Fig. 1 (c) has provided through sample frequency; Under the condition of Fs 〉=BW+2*BW1, the image signal of having an opportunity to be aliased into useful signal frequency band BW all is in the stopband of filter, has guaranteed that useful signal is not disturbed by aliasing signal; Carry out frequency domain transform at numeric field, for example FFT conversion can be taken out each subband of corresponding useful signal bandwidth BW at frequency domain, and does signal and separate the reprocessing work that is in harmonious proportion, shown in Fig. 1 (d).
Each execution mode of the present invention all is based on subband and carries out signal transmission.The subband that in whole transmitted bandwidth, has a plurality of frequency domain quadratures and adopt the single carrier mode to modulate; the symbol of each subband includes a data message part and a Cyclic Prefix that shields; each data message partly comprises at least one data message; wherein the data message of at least one subband partly comprises at least two data messages; between each subband data message part and Cyclic Prefix align respectively in time domain (be between each subband the data message part in time domain alignment, and between each subband Cyclic Prefix also in time domain alignment).
The width of each subband can be the same or different, but each subband all snaps on certain frequency lattice point in whole wideband transmit frequency band, and this lattice point spacing is a narrowest possible subband bandwidth, thereby simplified system sends and the design of frequency acceptance band.
It is pointed out that the subband (subband) in each execution mode of the present invention has essence different with subcarrier (subcarrier) in the OFDM/OFDMA system.Each symbol in the subcarrier of OFDM/OFDMA system only carries a data message; And in the embodiment of the present invention, in the total bandwidth BW of wireless channel scope, have at least the symbol of a subband to carry more than one data message.Symbol is strict inverse relation in the bandwidth of the length of time domain and subcarrier in the subcarrier of OFDM/OFDMA system, promptly in the subcarrier symbol in bandwidth=1 of the length * subcarrier of time domain.And in embodiments of the present invention, have at least a subband to satisfy: symbol is at the bandwidth=N of the length * subband of time domain in the subband, and wherein N is the positive integer greater than 1.This moment, subband was wideer than subcarrier bandwidth, and subband can carry N data message on time domain in a symbol.Because subband is wideer than subcarrier bandwidth, so to the broadband signal of same band, compared with the signal that is become by more number sub carrier group by the signal that less number subband group becomes, peak-to-average force ratio is littler, and power efficiency is higher, and is more insensitive to frequency deviation.Here alleged symbol is with the smallest transmission unit on the time domain of Cyclic Prefix protection.
A plurality of subbands can be that frequency domain is continuous, also can be discontinuous, and what have that one or more frequency bands carry in the middle of promptly is the information that is transferred to other receivers, and these subbands can continuously or be scattered and are present in the current receiver frequency acceptance band.
First execution mode of the present invention relates to the method for transmitting signals based on subband, and comprising the transmission of signal and two parts of reception of signal, its overall procedure as shown in Figure 2.
In step 201, sender produces a plurality of subband signals according to the bandwidth ability of subband bandwidth and self transmission, wherein each subband signal all is the single carrier transmission mode, then a plurality of subband signals are passed through frequency division multiplex (Frequency Division Multiplexing, be called for short " FDM ") the mode synthetic band transmission signals of having a lot of social connections, wherein carry the information of specifying receiver that sends to above the continuous subband of some frequency domain.
After this enter step 202, the broadband signal that is produced in the step 201 is launched on wireless channel, is transferred to receiver through wireless channel.Sender is when emission, and the subband that can will belong to a plurality of receivers is simultaneously launched simultaneously.
After this enter step 203, after receiver is received the signal that sender launches, partly carry out processing such as low noise amplification, down-conversion and low frequency amplification, the output analog baseband signal by the RF of receiver.
After this enter step 204, the analog baseband signal of exporting in the step 203 is carried out antialiasing filter.This step came down to before Base-Band Processing, and the signal outside the total bandwidth to useful subband, within the transmitted bandwidth of sender suppresses.Wherein the total bandwidth of useful subband is less than transmitted bandwidth.By this inhibition, needn't require receiver to use the bandwidth identical just can correctly receive the information that sender will be transferred to receiver with sender, thereby reduced the disposal ability requirement of the parts such as radio frequency, analog-to-digital conversion, base band of receiver, reduced power consumption, provided cost savings.
After this entering step 205, carry out analog-to-digital conversion, is digital signal with the analog signal conversion of importing.The monolateral bandwidth sum of the transition band that analog-to-digital sample frequency should descend gradually more than or equal to the total bandwidth and the passband filtering amplitude-frequency response of described useful subband.
After this enter step 206, carry out subband and select, promptly mail to each subband of specifying receiver from through the digital signal of conversion, selecting.Subband is selected and can be carried out at frequency domain, such as by the FFT conversion, also can carry out in time domain, such as being undertaken by suitable filter
After this enter step 207, the subband of selecting is carried out signal processing.
After this enter step 208, carry out data demodulates and reprocessing, finish the reception of data message.
Processing in the above-mentioned steps 206,207 and 208 all is the part of Base-Band Processing.
Second execution mode of the present invention improves on the basis of first execution mode, and its handling process as shown in Figure 3.With respect to first execution mode, second execution mode mainly is to have increased step 301 and 302.
In step 301, the digital signal that step 205 is exported is carried out digital anti-aliased filtering.
In step 302, the signal through the anti-aliased filtering of numeral is carried out down-sampling.The monolateral bandwidth sum of the transition band that the sample frequency of down-sampling descends gradually more than or equal to the total bandwidth and the passband filtering amplitude-frequency response of useful subband.
The same with step 204, the purpose of step 301 and step 302 also is outside the total bandwidth to useful subband, the signal within the transmitted bandwidth of sender suppresses.Thereby can reduce needing of the disposal ability requirement of the less receiver of message transmission rate at radio frequency processing and base band front end.。
Because in steps 204, the two-layer anti-aliased filtering formed of step 301 and step 302, so the better effects if of filtering.
More than the main distinction of two execution modes mainly be to realize the mode difference that suppresses by anti-aliased filtering.In order to reach the purpose of anti-aliased filtering, can be not limited to above dual mode, one of can adopt in the following manner or its combination in any realizes:
Radio frequency path equivalence bandpass filtering before the analog-to-digital conversion, the analog bandpass filtering before the analog-to-digital conversion, the numeric field bandpass filtering after the analog-to-digital conversion.
Above-mentioned method execution mode can be realized in 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, be called for short " PAL "), random access memory (Random Access Memory, be called for short " RAM "), programmable read only memory (Programmable Read Only Memory, be called for short " PROM "), read-only memory (Read-Only Memory, be called for short " ROM "), Electrically Erasable Read Only Memory (Electrically Erasable Programmable ROM, be called for short " EEPROM "), disk, CD, digital versatile disc (Digital Versatile Disc is called for short " DVD ") or the like.
In order to realize the said method execution mode, provide the execution mode of a kind of sender and receiver below.
Sender as a kind of embodiment of the present invention comprises with lower unit:
Modulating unit is used for the reception bandwidth according to receiver, and on the data-modulated that needs is sent to this receiver each subband within this receiver receiving belt wide region, this receiver receives the transmitted bandwidth of bandwidth less than sender.
Transmitter unit is used for each subband that belongs to receiver through the modulating unit modulation is launched simultaneously with the subband that belongs to other receiver.
Receiver as a kind of embodiment of the present invention comprises with lower unit:
Antenna is used to receive the signal that sender is launched.
RF processing unit is used for the signal from antenna is carried out radio frequency processing.
AD conversion unit is used for the analog signal conversion of RF processing unit output is become digital signal, outputs to baseband processing unit.
Baseband processing unit is used to carry out Base-Band Processing.Baseband processing unit may further include the subelement that is used for subband selection, subband processing, data demodulates and reprocessing.
Suppress the unit, be used for before Base-Band Processing, the signal outside the total bandwidth to useful subband, within the transmitted bandwidth of sender suppresses, and wherein the total bandwidth of useful subband is less than transmitted bandwidth.
Suppress the unit one of can be in the following manner or its combination in any realize:
The equivalent bandpass filter that realizes in the radio frequency path before AD conversion unit.
The analog band-pass filter that between RF processing unit and AD conversion unit, is connected in series.
The numeric field band pass filter and the downsampling unit that between AD conversion unit and baseband processing unit unit, are connected in series.
Need to prove, each unit of receiver and sender all is a logical block in the embodiment of the present invention, 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, receiver and sender will not introduced not too close unit with solving technical problem relation proposed by the invention in the embodiment of the present invention, and this does not show that there is not other unit in the said equipment execution mode.For example, sender can also have up-conversion unit, power amplifier unit or the like.
Sender that above-mentioned execution mode is mentioned and receiver can be used for finishing the method flow that first and second execution mode is mentioned.Therefore all ins and outs of mentioning in first and second execution mode are still effective in the present embodiment, in order to reduce repetition, repeat no more here.
Though pass through with reference to some of the preferred embodiment of the 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 the form and details, and without departing from the spirit and scope of the present invention.
Claims (11)
1. the method for receiving and processing signal based on subband is characterized in that, may further comprise the steps:
Receive the signal that sender is launched;
Before Base-Band Processing, outside the total bandwidth to useful subband, signal within the transmitted bandwidth of described sender suppresses, the total bandwidth of wherein said useful subband is less than described transmitted bandwidth, the subband that has a plurality of frequency domain quadratures in the described transmitted bandwidth and adopt the single carrier mode to modulate, the symbol of each subband includes a data message part and a Cyclic Prefix that shields, each data message partly comprises at least one data message, wherein the data message of at least one subband partly comprises at least two data messages, and data message part and Cyclic Prefix align respectively in time domain between each subband;
Signal through suppressing is carried out Base-Band Processing.
2. the method for receiving and processing signal based on subband according to claim 1 is characterized in that, comprises radio frequency processing and analog-to-digital step before Base-Band Processing;
In the described step that suppresses, one of in the following manner or its combination in any realize described inhibition:
Radio frequency path equivalence bandpass filtering before the analog-to-digital conversion, the analog bandpass filtering before the analog-to-digital conversion, the numeric field bandpass filtering after the analog-to-digital conversion.
3. the method for receiving and processing signal based on subband according to claim 2, it is characterized in that, realize under the situation of described inhibition the monolateral bandwidth sum of the transition band that described analog-to-digital sample frequency descends gradually more than or equal to the total bandwidth and the passband filtering amplitude-frequency response of described useful subband with equivalence bandpass filtering of the radio frequency path before the described analog-to-digital conversion or analog bandpass filtering.
4. the method for receiving and processing signal based on subband according to claim 2, it is characterized in that, realize under the situation of described inhibition with the numeric field bandpass filtering after the described analog-to-digital conversion, the step that before numeric field bandpass filtering and Base-Band Processing, also comprises down-sampling, the wherein monolateral bandwidth sum of the transition band that descends gradually more than or equal to the total bandwidth and the passband filtering amplitude-frequency response of described useful subband of the sample frequency of down-sampling.
5. according to each described method for receiving and processing signal in the claim 1 to 4 based on subband, it is characterized in that, the width of each described subband is identical or different, all snaps on the frequency lattice point at each subband of described transmitted bandwidth, and this lattice point spacing is a narrowest possible subband bandwidth.
6. according to each described method for receiving and processing signal in the claim 1 to 4, it is characterized in that, comprise the substep of subband selection, subband processing, data demodulates and reprocessing in the step of described Base-Band Processing based on subband;
Wherein subband is selected and can be realized by fast Fourier transform or filtering.
7. the signal transmitting method based on subband is characterized in that, may further comprise the steps:
Reception bandwidth according to receiver, on the data-modulated that needs is sent to this receiver each subband within this receiver receiving belt wide region, this receiver receives the transmitted bandwidth of bandwidth less than sender, the subband that has a plurality of frequency domain quadratures in the described transmitted bandwidth and adopt the single carrier mode to modulate, the symbol of each subband includes a data message part and a Cyclic Prefix that shields, each data message partly comprises at least one data message, wherein the data message of at least one subband partly comprises at least two data messages, and data message part and Cyclic Prefix align respectively in time domain between each subband;
Each subband that will belong to described receiver is launched simultaneously with the subband that belongs to other receiver.
8. a receiver is characterized in that, comprising:
Antenna is used to receive the signal that sender is launched;
Baseband processing unit is used to carry out Base-Band Processing, it is characterized in that, also comprises:
Suppress the unit; be used for before Base-Band Processing; outside the total bandwidth to useful subband; signal within the transmitted bandwidth of described sender suppresses; the total bandwidth of wherein said useful subband is less than described transmitted bandwidth; the subband that has a plurality of frequency domain quadratures in the described transmitted bandwidth and adopt the single carrier mode to modulate; the symbol of each subband includes a data message part and a Cyclic Prefix that shields; each data message partly comprises at least one data message; wherein the data message of at least one subband partly comprises at least two data messages, and data message part and Cyclic Prefix align respectively in time domain between each subband.
9. receiver according to claim 8 is characterized in that, also comprises:
RF processing unit is used for the signal from described antenna is carried out radio frequency processing;
AD conversion unit is used for the analog signal conversion of RF processing unit output is become digital signal, outputs to described baseband processing unit;
Described inhibition unit one of in the following manner or its combination in any realize:
The equivalent bandpass filter that realizes in the radio frequency path before described AD conversion unit;
The analog band-pass filter that between described RF processing unit and described AD conversion unit, is connected in series;
The numeric field band pass filter and the downsampling unit that between described AD conversion unit and described baseband processing unit unit, are connected in series.
10. a sender is characterized in that, comprises
Modulating unit, be used for reception bandwidth according to receiver, on the data-modulated that needs is sent to this receiver each subband within this receiver receiving belt wide region, this receiver receives the transmitted bandwidth of bandwidth less than sender, each subband frequency domain quadrature each other wherein, each subband adopts the single carrier mode to modulate, the symbol of each subband includes a data message part and a Cyclic Prefix that shields, each data message partly comprises at least one data message, wherein the data message of at least one subband partly comprises at least two data messages, and data message part and Cyclic Prefix align respectively in time domain between each subband;
Transmitter unit is used for each subband that belongs to described receiver through described modulating unit modulation is launched simultaneously with the subband that belongs to other receiver.
11. sender according to claim 10 is characterized in that, also comprises:
The subband map unit is used for signal map with each subband of described modulating unit output in the total bandwidth of wireless channel;
Digital to analog converter is used for converting the digital signal after described subband map unit mapping to analog signal;
Frequency mixer is used for the signal of described digital to analog converter output is carried out mixing;
Also comprise before the described digital to analog converter and be used to reduce the DC component that enters described mixer signal input increases the frequency domain displacement to the digital signal that enters described digital to analog converter to the receiver influence unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100432315A CN101557373B (en) | 2008-04-09 | 2008-04-09 | Method and device for transmitting and receiving signals based on subbands |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100432315A CN101557373B (en) | 2008-04-09 | 2008-04-09 | Method and device for transmitting and receiving signals based on subbands |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101557373A true CN101557373A (en) | 2009-10-14 |
| CN101557373B CN101557373B (en) | 2013-08-21 |
Family
ID=41175320
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100432315A Active CN101557373B (en) | 2008-04-09 | 2008-04-09 | Method and device for transmitting and receiving signals based on subbands |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101557373B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107113081A (en) * | 2017-03-20 | 2017-08-29 | 焦彦华 | One kind unified standard quadrature wave subbranch multiple access radio system |
| CN108199998A (en) * | 2017-12-29 | 2018-06-22 | 北京宇电科技集团有限公司 | A kind of anti-aliasing filter method, apparatus and programmable logic device |
| WO2021155681A1 (en) * | 2020-02-03 | 2021-08-12 | 腾讯科技（深圳）有限公司 | Sideband suppression method, apparatus and computer device, and storage medium |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1895703A1 (en) * | 2006-07-05 | 2008-03-05 | Koninklijke Philips Electronics N.V. | Bandwidth asymmetric communication system based on OFDM and TDMA |
| CN101136894B (en) * | 2007-03-23 | 2012-11-28 | 中兴通讯股份有限公司 | Extendable OFDM and ofdma bandwidth distributing method and system |
-
2008
- 2008-04-09 CN CN2008100432315A patent/CN101557373B/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107113081A (en) * | 2017-03-20 | 2017-08-29 | 焦彦华 | One kind unified standard quadrature wave subbranch multiple access radio system |
| CN107113081B (en) * | 2017-03-20 | 2019-06-11 | 焦彦华 | A kind of unified standard quadrature wave subbranch multiple access radio system |
| CN108199998A (en) * | 2017-12-29 | 2018-06-22 | 北京宇电科技集团有限公司 | A kind of anti-aliasing filter method, apparatus and programmable logic device |
| WO2021155681A1 (en) * | 2020-02-03 | 2021-08-12 | 腾讯科技（深圳）有限公司 | Sideband suppression method, apparatus and computer device, and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101557373B (en) | 2013-08-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2200244B1 (en) | Method and apparatus for multi-carrier frequency division multiplexing transmission | |
| JP3931666B2 (en) | Power line carrier communication equipment | |
| CN103259754B (en) | A kind of digital front-end system and its implementation for power line carrier communication | |
| US8665695B2 (en) | Methods for transceiving data in multi-band orthogonal frequency division multiple access communications system and communications apparatuses utilizing the same | |
| CN103716266B (en) | Signal processing method, apparatus and system | |
| EP1850493A2 (en) | Communication apparatus based on multi-carrier modulation system with simultaneous transmission and reception in the same frequency band | |
| US20090185545A1 (en) | Wireless Communication Systems and Methods | |
| JP4978942B2 (en) | Wireless communication system | |
| CN102089991A (en) | Multi-band data transmission method | |
| CN101557373B (en) | Method and device for transmitting and receiving signals based on subbands | |
| CN101557375B (en) | Wireless transmission method based on sub-band and device thereof | |
| Liu et al. | On (power-) line defined PLC system | |
| US8630365B2 (en) | Transceiver for communicating over different media types | |
| JP4548427B2 (en) | Power line carrier communication equipment | |
| CN101552755B (en) | Signal transmitting and receiving method based on subcarrier waves and transceiver | |
| CN101557284B (en) | Method and device for transmitting and receiving wireless signal | |
| Khare et al. | Self-interference cancellation in SISO full-duplex system | |
| US20190349157A1 (en) | Receiver, transmitter, communication system for subband communication and methods for subband communication | |
| CN101562587B (en) | Wireless transmission method based on subcarrier and device thereof | |
| JP5712729B2 (en) | Communications system | |
| Gao et al. | A new digital front end structure for cognitive PLC systems | |
| Goodman et al. | Frequency position modulation using multi-spectral projections | |
| CN109076049A (en) | Distortion function selection based on distribution | |
| Hoyos et al. | Ultra-wideband multicarrier communication receiver based on analog to digital conversion in the frequency domain | |
| KR101463465B1 (en) | Single carrier wideband psk radio equipment for spectrum sharing with narrowband communication system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170112 Address after: Room 32, building 3205F, No. 707, Zhang Yang Road, free trade zone,, China (Shanghai) Patentee after: Xin Xin Finance Leasing Co.,Ltd. Address before: 201203 Shanghai city Zuchongzhi road Pudong Zhangjiang hi tech park, Spreadtrum Center Building 1, Lane 2288 Patentee before: Spreadtrum Communications (Shanghai) Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170707 Address after: 100033 room 2062, Wenstin Executive Apartment, 9 Financial Street, Beijing, Xicheng District Patentee after: Xin Xin finance leasing (Beijing) Co.,Ltd. Address before: Room 32, building 707, Zhang Yang Road, China (Shanghai) free trade zone, 3205F Patentee before: Xin Xin Finance Leasing Co.,Ltd. |
|
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20091014 Assignee: SPREADTRUM COMMUNICATIONS (SHANGHAI) Co.,Ltd. Assignor: Xin Xin finance leasing (Beijing) Co.,Ltd. Contract record no.: 2018990000163 Denomination of invention: Method and device for transmitting and receiving signals based on subbands Granted publication date: 20130821 License type: Exclusive License Record date: 20180626 |
|
| EE01 | Entry into force of recordation of patent licensing contract | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200305 Address after: 201203 Zuchongzhi Road, China (Shanghai) pilot Free Trade Zone 2288 Patentee after: SPREADTRUM COMMUNICATIONS (SHANGHAI) Co.,Ltd. Address before: 100033 room 2062, Wenstin administrative apartments, 9 Financial Street B, Xicheng District, Beijing. Patentee before: Xin Xin finance leasing (Beijing) Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200601 Address after: 361012 unit 05, 8th floor, building D, Xiamen international shipping center, No.97 Xiangyu Road, Xiamen area, China (Fujian) free trade zone Patentee after: Xinxin Finance Leasing (Xiamen) Co.,Ltd. Address before: 2288 Zuchongzhi Road, China (Shanghai) pilot Free Trade Zone Patentee before: SPREADTRUM COMMUNICATIONS (SHANGHAI) Co.,Ltd. |
|
| EC01 | Cancellation of recordation of patent licensing contract | ||
| EC01 | Cancellation of recordation of patent licensing contract |
Assignee: SPREADTRUM COMMUNICATIONS (SHANGHAI) Co.,Ltd. Assignor: Xin Xin finance leasing (Beijing) Co.,Ltd. Contract record no.: 2018990000163 Date of cancellation: 20210301 |
|
| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20091014 Assignee: SPREADTRUM COMMUNICATIONS (SHANGHAI) Co.,Ltd. Assignor: Xinxin Finance Leasing (Xiamen) Co.,Ltd. Contract record no.: X2021110000010 Denomination of invention: Signal transmitting and receiving method and equipment based on Subband Granted publication date: 20130821 License type: Exclusive License Record date: 20210317 |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230717 Address after: 201203 Shanghai city Zuchongzhi road Pudong New Area Zhangjiang hi tech park, Spreadtrum Center Building 1, Lane 2288 Patentee after: SPREADTRUM COMMUNICATIONS (SHANGHAI) Co.,Ltd. Address before: Unit 05, 8 / F, building D, Xiamen international shipping center, 97 Xiangyu Road, Xiamen area, 361012 China (Fujian) pilot Free Trade Zone Patentee before: Xinxin Finance Leasing (Xiamen) Co.,Ltd. |