CN101141430A - Circulation prefix parameter setting method for wireless signal framing - Google Patents
Circulation prefix parameter setting method for wireless signal framing Download PDFInfo
- Publication number
- CN101141430A CN101141430A CNA2006101276885A CN200610127688A CN101141430A CN 101141430 A CN101141430 A CN 101141430A CN A2006101276885 A CNA2006101276885 A CN A2006101276885A CN 200610127688 A CN200610127688 A CN 200610127688A CN 101141430 A CN101141430 A CN 101141430A
- Authority
- CN
- China
- Prior art keywords
- setting
- symbol
- bandwidth
- length
- frame
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2662—Symbol synchronisation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
- H04L27/2605—Symbol extensions, e.g. Zero Tail, Unique Word [UW]
- H04L27/2607—Cyclic extensions
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2626—Arrangements specific to the transmitter only
- H04L27/2627—Modulators
- H04L27/2634—Inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators in combination with other circuits for modulation
- H04L27/2636—Inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators in combination with other circuits for modulation with FFT or DFT modulators, e.g. standard single-carrier frequency-division multiple access [SC-FDMA] transmitter or DFT spread orthogonal frequency division multiplexing [DFT-SOFDM]
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The present invention relates to a method for setting the cyclic prefix parameter of a wireless signal framing. A minimum band width transmitted by a UE in diplex is determined first, next the reference CP length adopted by the transmitting interface of the UE is established, the CP lengths of the first symbol and the other symbols in a frame are set on the basis of the reference CP length, and then according to different conditions, the sampling points of each symbol in a frame are set. The present invention leads the reservation time of rising and dropping of the CP and the sampling points of the UE with different band width transmitted to be lined up under the same system. The set of the CP keeps relatively uniform in each frame. The parameter set out enables the capability of the multi-path Interference resistance in transmission of each symbol to be maximized. The method avoids the blind detection during the process of random access. When the sampling rate of the UE with different band width adopts a multiple relationship, each CP point under different band width adopt a multiple relationship in proportion, and thus the base band processing process is simplified, and the setting of the air interface is also simplified.
Description
Technical Field
The invention relates to a CP (Cyclic Prefix) parameter setting method based on discrete Fourier transform spread spectrum orthogonal frequency division multiplexing (DFT-S-OFDM) wireless signal modulation.
Background
As a modulation method of a single carrier wireless signal, DFT spread Orthogonal Frequency Division Multiplexing (OFDM) preprocesses a single carrier signal by DFT and then maps output subcarriers to IFFT inputs at equal intervals, and the result of IFFT transformation is a signal source for transmission modulation. The introduction of the CP further enhances the system's ability to resist intersymbol interference (ISI), while also better maintaining orthogonality between subcarriers.
DFT conversion:
wherein k =0 \ 8230and D-1
IFT conversion:
wherein 1=0, \ 8230;, N-1.
Based on the above formula, FIG. 1 shows a signal processing structure diagram of DFT-S-OFDM. D < N, F in the figure d (D =0, \8230;, D-1) is complemented by N-D0 s before the input IFT transformation. The way of complementing 0 is in F d Each value of the sequence is complemented by an equal number of 0 s, and the remaining 0 s are equally divided on the left and right sides of the entire sequence as guard band complements. The signal generated by the foregoing method has a certain number of samples at the tail part copied to the front part of the signal as a cyclic prefix CP (cyclic prefix), thereby forming a complete Symbol (Symbol). The CP may protect the multipath components of the signal from inter-symbol interference. The length of the symbol is variable according to the difference of the values of the N points and the difference of the subcarrier intervals, and the device transmits data by transmitting consecutive symbols. Figure 3 demonstrates a continuous signal transmitted by the device.
In each frame signal of DFT-S-OFDM, a plurality of symbols are contained, and the length of the symbols can be different. Due to the nature of digital signals, their sampling frequency is constant within a frame. Therefore, when the length of a symbol corresponds to the number of sampling points occupied by the symbol, it is also consistent with the value of the input point N (see fig. 1) of the IFFT.
The DFT-S-OFDM technology becomes a popular technology for the uplink in the 3GPP UMTS wireless communication technology long term evolution LTE. As a technique of uplink time division multiplexing, DFT-S-OFDM supports time division and frequency division multiplexing of different Users (UEs). In which, because of the time division multiplexing, the time for the sampling point to fall and rise is reserved, the CP of the first symbol in each frame of the wireless signal is longer than the CP of the other symbols in the frame. According to a practical method, when the sampling rate of the bandwidth is 1.25MHz and the sampling rate is 1.92MHz, the falling time and the rising time of a proper sampling point are 4.17us, namely 8 sampling points.
The DFT-S-OFDM uplink signals of the UE equipment with different transmission bandwidths can be further frequency division multiplexed together for receiving and decoding the same wireless access equipment. A schematic of which is shown in figure 2.
Because UEs with different transmission bandwidths need to frequency division multiplex to the same frame, and parameters such as their sampling rates and FFT point numbers are different, it may cause that CPs with different bandwidths cannot be aligned in time. Thus resulting in a reduction of the effective CP length and even inter-UE interference.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a CP parameter setting method in DFT-S-OFDM (discrete Fourier transform spread spectrum orthogonal frequency division multiplexing) wireless signal framing, so that CPs of all symbols transmitted by UE with any two different bandwidths are aligned in time length or aligned to the maximum possible extent.
The invention provides a method for setting cyclic prefix parameters for framing wireless signals, which comprises the following steps:
(1) Set of bandwidth values B preferred in the system a A =1.. A }, satisfying any one of B a ＜B a+1 (ii) a Maximum B a′ (a ' e {1.. A }) such that for any a ' e { a '. A }, a positive integer d can always be found to satisfy F a′ ×d＝F a″ ；
(2) At the following two valuesTaking the minimum value: maximum bandwidth B which can be expanded by multiple calculated in the previous step a′ And the minimum bandwidth of the UE allowed to be used in the system. This minimum is taken as the minimum bandwidth transmitted by the UE in the multiplex.
Step 2, setting the minimum bandwidth determined in step 1 and uplink subframe cyclic prefix parameters of the system and the UE of all other bandwidths which are more than the bandwidth and can be adopted in the system, wherein the setting of each bandwidth cyclic prefix parameter comprises the following steps:
(1) Setting the reference CP length adopted by a transmitting interface of the UE:
(2) Setting the CP Length Lc of the first symbol in the frame 1 ＝L c +L r CP Length Lc of all other symbols s ＝L c ；s＝2，..，S；
(3) When in use
When the CP of each symbol s in the frame is \57746;, lc s ×F a \57747Asample points; otherwise, set
For the symbol S (S =1., S), if R.times.s.57747; > 57746; R.times.1 57747; the CP length of the symbol is set to 57746; lc s ×F a \57747, +1 spots and the CP lengths of the other symbols are 57746and Lc s ×F a \57747Asample spots;
wherein: l is a radical of an alcohol c Is the reference CP Length, L f Is the frame length, L r Time is reserved for the fall and rise of the sample point, and L r Is determined according to the minimum bandwidth of UE transmission in the multiplex obtained in step 1, and L r As a unique value applied to all bandwidths, L b Is the length of the symbols without CP, S is the number of symbols in the frame, F a Is the sampling frequency.
The invention obtains the length of the CP of each symbol in a frame by a given method and further sets the CP, so that the descending and ascending reserved time of the CP and the sampling point of the UE with different transmitting bandwidths can be aligned under the same system. The setting of the CP also remains relatively uniform in each frame. The parameter set by the invention can maximize the capability of each symbol for resisting multipath interference in transmission. This method avoids blind detection at random access. When the sampling rates of the UEs with different bandwidths are in a multiple relation, the number of each CP point under different bandwidths is in the same proportional multiple relation, so that the baseband processing process is simplified, and the setting of an air interface is also simplified.
Drawings
FIG. 1 is a schematic diagram of subcarrier mapping for DFT-S-OFDM;
FIG. 2 is a diagram of a complete DFT-S-OFDM signal generation;
FIG. 3 is a frame structure diagram of symbol framing of an air signal;
FIG. 4 is a schematic diagram of the application of the present invention;
fig. 5 is a structural diagram of a frame in an embodiment of the present invention.
Detailed Description
The invention is applied in the following scenes: a wireless access system takes DFT-S-OFDM signals as uplink wireless transmission multiplexing, and UE transmitting bandwidths of uplink access are different but in a multiple relation.
When the DFT-S-OFDM signal CP parameter setting method is introduced, a plurality of parameters are introduced firstly: sampling frequency, time length of frame, number of symbols, length of symbols with CP removed (referred to as "block"), minimum bandwidth of UE transmission in multiplexing, andthe frequency and minimum bandwidth determine the time of the fall and rise of the sampling point. Wherein the sampling frequency is different according to the transmission bandwidth of the UE. The other parameters are the same for all UEs. Symbolically expressed as: sampling frequency F a Ms, frame length L f ms, and length per symbol in frame without CP (block length) is L b ms, where b =1, \ 8230;, S. S is the total number of symbols in the frame. For UEs with different transmission bandwidths, the sampling frequency F is set as described above a Ms corresponds to different bandwidths B a Take different values, where a =1.. A (a is the number of bandwidths).
The invention determines the minimum bandwidth transmitted by UE in multiplexing by the following method:
1. the maximum bandwidth that can be extended by a factor is calculated. That is, the sampling frequency at that bandwidth is multiplied by the sampling frequency at another bandwidth, which can be a positive integer. Namely: set of bandwidth values B that can be taken at the system a A =1.. A }, satisfying any one of B a ＜B a+1 (ii) a Maximum B a′ (a ' e {1.. A }) such that for any a ' e { a '. A }, a positive integer d can always be found to satisfy F a′ × d＝F a″ ；
2. Take the minimum of the following two values: maximum multiplicable bandwidth B of previous calculation a′ And the minimum bandwidth of the UE allowed to be used in the system. This minimum is taken as the minimum bandwidth transmitted by the UE in the multiplex.
Determining the descending and ascending reservation time L of the corresponding sampling point according to the minimum bandwidth transmitted by the UE in multiplexing obtained in the step r And applies this value to all higher bandwidths as the only value. The present invention uses the following steps to set the length of each CP in a frame for the wireless transmission interface of a system and a UE with different transmission bandwidths, respectively:
1. setting the reference CP length adopted by a transmitting interface of the UE: the length of the reference CP is the frame length, all block lengths are removed, the descending and ascending reserved time of the sampling point is removed, and then the frame length is divided into a plurality of framesThe values obtained by averaging the symbols allocated to each frame, namely: the length of the reference CP is
2. When setting the radio frame parameters, the length of the first CP is the length of the reference CP plus the descending and ascending reservation time of the sampling point, and the other CPs are set as the length of the reference CP, namely: setting the CP Length Lc of the first symbol in the frame 1 ＝L c +L r CP Length Lc of all other symbols s ＝ L c ，(s＝2，..，S)；
3. And converting the number of the sampling points according to the set CP length and the set sampling rate so as to set each CP. When the length of the CP does not correspond to an integer number of sampling points, the CP with more sampling points after the reserved descending and ascending sampling points are removed is uniformly distributed in the frame as much as possible. Namely: when in use
When the temperature of the water is higher than the set temperature,
the CP of each symbol s in the frame is \57746; lc s ×F a \57747Asample spots; otherwise, set
For the symbol S (S =1.. S), if R.times.s.57746; R.times.s.57747; >. 57746; R.times.1) \57747; the CP length of the symbol is set to be 57746; lc s ×F a \57747, +1 spots and other symbols with CP length of 57746Lc s ×F a 57747A sample spot.
According to the scheme:
A. the minimum transmission bandwidth of the UE and the corresponding sampling rate determine the descending and ascending reservation time of the sampling point, and the number of the sampling points of other higher bandwidths in the same reservation time is increased proportionally according to the increase of the sampling frequency.
B. When in useThe number of sample points of all CP is completely in accordance with the formula 57746 and Lc s ×F a \57747Apharmaceutical composition. The CP length generated at this time is most satisfactory.
C. In step 3, a reaction mixture of 57746 and Lc is adopted s ×F a Symbols corresponding to the CP of \57747 +1 sample points length are selected as evenly spaced as possible within the frame.
D. Although the length of the symbols in the frame is not equal, the multipath delay spread for each symbol is the same since the system is used in the same wireless transmission scenario. The CP set by the method provides multipath suppression capability which is as close as possible for each symbol, so that the resource utilization of the sampling point is maximized. When the lengths of each CP in the frame are equal after the reserved time of the descending and ascending of the sampling point is removed, the CP setting effect is optimal.
E. When the UE performs uplink random access, due to the fact that CP lengths of different transmission bandwidths are aligned, the wireless access device does not need to know the bandwidth type of the UE in advance, and therefore blind detection is avoided.
F. Since the wireless transmission interface is relatively fixed, the set CP length is determined in advance. When the UE transmission bandwidth is extended by an integer multiple, the sampling rate is also extended by the same multiple, so the length of the CP can be extended by the same multiple, that is, the number of extended samples is obtained by multiplying the original CP sample by the same multiple. This is simpler to implement and the design has greater implantation.
Fig. 4 shows an access system according to an embodiment of the present invention, which includes a wireless access device and a handheld User Equipment (UE). The invention is applied to the parameter part of the DFT-S-OFDM uplink signal of the UE. In an embodiment of the invention:
the UE transmit uplink allocation bandwidth may be configured as one of a set of values: 1.25MHz, 2.5MHz,5MHz,10MHz,15MHz, and 20MHz. The set of values are integer multiples of 1.25M, which facilitates flexible bandwidth allocation. The bandwidth can be configured to 6 different sets of values. The respective sampling rates are shown in table 1. The sampling rate is proportional to the allocated bandwidth. In this embodiment, 10MHz is the minimum bandwidth capability of the UE, that is, each UE can transmit and receive with a bandwidth of 10MHz according to the requirement of the system. By the method provided by the scheme, according to table 1, the maximum multiplicable bandwidth can be calculated to be 5M, that is, the sampling rate 7680 corresponding to the 5M bandwidth is multiplied by 2,3 and 4 respectively to obtain the sampling rates of 10m,15m and 20M. And taking the minimum value of the two bandwidth values to obtain that the minimum bandwidth transmitted by the UE in multiplexing is 5M. By the method provided by the scheme, the set falling and rising reservation time of the sampling point is 8 sampling points under 5M, and is 1/960ms. For all bandwidths above 5M, the sample points have a fall and rise reservation time of 1/960ms.
Table 1:
| distribution strip Width of (MHz) | Frame length (ms) | Sampling rate Samples/ms | Long block (mus/payload) Wave number | Short block (μ s/payload) Wave number | CP Length (μ s/spot) Number) |
| Number of spots | Number of samples) | ||||
| 20 | 0.5 | 30720 | 66.67/1200/204 8 | 33.33/600/102 4 | (4.04/124) ×7， (5.08/156) ×1* |
| 15 | 0.5 | 23040 | 66.67/900/153 6 | 33.33/450/76 8 | (4.04/93) ×7， (5.08/117) ×1* |
| 10 | 0.5 | 15360 | 66.67/600/102 4 | 33.33/300/51 2 | (4.04/62) ×7， (5.08/78) ×1* |
| 5 | 0.5 | 7680 | 66.67/300/512 | 33.33/150/25 6 | (4.04/31) ×7， (5.08/39) ×1* |
| 2.5 | 0.5 | 3840 | 66.67/150/256 | 33.33/75/128 | |
| 1.25 | 0.5 | 1920 | 66.67/75/128 | 33.33/38/64 |
Description of the drawings: * The CP containing the fall and rise times of the sample points is reserved.
Regardless of the allocated bandwidth, the frame structure is as in fig. 5. There are 6 long blocks of L black and 2 short blocks of black in the frame, half black and half white for the rise and fall times, and white frames for the CP without the rise and fall times. Each block and the CP located in front thereof constitute one symbol. For the aforementioned 9 allocated bandwidths, the block length and frame length parameters are fixed. The long block is 1/15ms, the short block is 1/30ms, and the frame length is 0.5ms. The block lengths in table 1 are reduced to submultiples.
The length of the reference CP should be (0.5 ms-1/7680 ms-6 (1/15 ms) -2 (1/30 ms))/8 =31/7680ms according to the setting method of the CP. Applying the above steps results in a divisor for each symbol sample value and corresponding time length for different bandwidths (see table 1). The sampling point numbers corresponding to the CP of the 5M,10M and 20M UE and different uplink distribution bandwidth/sampling frequency are also in strict proportional relation. See FIG. 5
For the transmission bandwidths of the 5M,10M,15M and 20M UEs, the number of samples contained in the CP is in a multiple relation. This feature can be used very well for devices that generate at certain clock frequencies. The sampling frequency is also derived from the clock frequency translation. The common conversion methods are frequency multiplication and frequency division methods.
When data of 5M,10M and 20M UE are frequency division multiplexed in a frame, the effective CP length is prevented from being reduced due to the fact that the length of each CP is completely consistent with the relative position of a symbol in the middle of the frame. The effective CP length is maximized. Meanwhile, the blind detection phenomenon of UE uplink random access is well avoided, namely: when accessing a system of a specific bandwidth, the symbol positions of all UEs are aligned within a subframe regardless of their bandwidths and corresponding parameters.
For the cases of 1.25M and 2.5M in table 1, there is no problem of multiplexing of transmission bandwidths of different UEs in the two bandwidth systems because the bandwidths are smaller than the minimum UE bandwidth. The CP length is not set in this case.
The bandwidth selection, the minimum transmission bandwidth, the sampling frequency, the frame length, the block length (i.e. the length of the symbol without the CP), the modulation mode of the signal, etc. in the present invention can be changed. For example: in another embodiment, the minimum bandwidth for UE transmission in frequency division multiplexing is 2.5MHz. The CP length setting principle is still the above method. Namely, the rise-fall time of the sampling point of 2.5MHz is taken as the standard, and the rise-fall time of the sampling of other bandwidths is set. In another embodiment, the modulation mode of the signal is the OFDM scheme without preprocessing. The CP length setting principle is still the above method.
Claims (5)
1. A method for setting the cyclic prefix parameter of the wireless signal framing comprises the following steps:
step 1, determining the minimum bandwidth transmitted by the UE in multiplexing, specifically including the following steps:
(1) Set of bandwidth values B preferred in the system a A =1.. A }, satisfying any one of B a ＜B a+1 (ii) a Maximum B a′ (a ' e {1.. A }) such that for any a ' e { a '. A }, a positive integer d can always be found to satisfy F a′ ×d＝Fa″；
(2) Take the minimum of the following two values: maximum multiplicable bandwidth B of previous calculation a′ And the minimum bandwidth of the UE allowed to be used in the system. The minimum value is taken as the minimum bandwidth transmitted by the UE in multiplexing;
step 2, setting the minimum bandwidth determined in step 1 and the cyclic prefix parameters of uplink subframes of all other bandwidth systems and UE which are more than the bandwidth and can be in the system, wherein the setting of the cyclic prefix parameters of each bandwidth subframe comprises the following steps
(1) Setting a reference CP length adopted by a transmitting interface of the UE:
(2) Setting the CP Length Lc of the first symbol in the frame 1 ＝L c +L r CP Length Lc of all other symbols s ＝L c ；s＝2，..，S；
(3) When the temperature is higher than the set temperature
When the CP of each symbol s in the frame is set to \57746;, lc s ×F a \57747Asample points; otherwise, set
For the symbol S (S =1., S), if R.times.s.57747; > 57746; R.times.1 57747; the CP length of the symbol is set to 57746; lc s ×F a \57747, +1 sampling points, and setting CP lengths of other symbols as \57746; lc s ×F a \57747Asample spots;
wherein: l is a radical of an alcohol c Is the reference CP Length, L f Is the frame length, L r Reserve time for the descent and ascent of the sampling point, and L r Is determined according to the minimum bandwidth of UE transmission in multiplexing obtained in step 1And L is r As a unique value applied to all bandwidths, L b Is the length of the symbols without CP, S is the number of symbols in the frame, F a Is the sampling frequency.
2. A method of setting cyclic prefix parameters for framing wireless signals according to claim 1, characterized by:
setting a system with a bandwidth of 5MHz and a CP (physical content provider) of a 1 st symbol in an uplink subframe of UE (user equipment) to be 5.08us long, namely 39 sampling points; samples from the 2 nd to 8 th symbols are 4.04us long, i.e., 31 samples).
3. A method of setting a cyclic prefix parameter for framing wireless signals according to claim 1 or 2, characterised in that.
Setting a system with a bandwidth of 10MHz and a CP of a 1 st symbol in an uplink subframe of UE to be 5.08us long, namely 78 sampling points; the 2 nd to 8 th symbol samples are 4.04us long, i.e., 62 sample points).
4. A method of setting cyclic prefix parameters for framing wireless signals according to claim 3, characterized by:
setting a system with a bandwidth of 15MHz and a CP (sample point) of a 1 st symbol in an uplink subframe of UE (user equipment) to be 5.08us long, namely 117 sample points; the 2 nd to 8 th symbol samples are 4.04us long, i.e., 93 sample points).
5. A method of setting cyclic prefix parameters for framing wireless signals according to claim 4, characterized by:
setting the CP of the 1 st symbol in the uplink subframe of a system with the bandwidth of 20MHz and UE to be 5.08us long, namely 156 sampling points; the 2 nd to 8 th symbol samples are 4.04us long, i.e., 124 samples).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610127688A CN100589471C (en) | 2006-09-07 | 2006-09-07 | Circulation prefix parameter setting method for wireless signal framing |
| PCT/CN2007/001808 WO2008031311A1 (en) | 2006-09-07 | 2007-06-07 | Setting cyclic prefix parameters method for wireless signal modulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610127688A CN100589471C (en) | 2006-09-07 | 2006-09-07 | Circulation prefix parameter setting method for wireless signal framing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101141430A true CN101141430A (en) | 2008-03-12 |
| CN100589471C CN100589471C (en) | 2010-02-10 |
Family
ID=39183378
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200610127688A Expired - Fee Related CN100589471C (en) | 2006-09-07 | 2006-09-07 | Circulation prefix parameter setting method for wireless signal framing |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN100589471C (en) |
| WO (1) | WO2008031311A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101534271B (en) * | 2008-03-14 | 2012-07-18 | 中兴通讯股份有限公司 | Method for supporting high-speed mobility in wireless communication system |
| CN107623652A (en) * | 2016-07-14 | 2018-01-23 | 中兴通讯股份有限公司 | A kind of data transmission method and device |
| CN107925646A (en) * | 2015-07-27 | 2018-04-17 | 高通股份有限公司 | The narrow-band operation of sample rate with reduction |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7023937B2 (en) * | 2001-03-01 | 2006-04-04 | Texas Instruments Incorporated | Receiver window design for multicarrier communication systems |
| KR100498953B1 (en) * | 2003-07-08 | 2005-07-04 | 삼성전자주식회사 | Transmitting/receiving apparatus and method for orthogonal frequency division multiple system using insufficient cyclic prefix |
| CN100481826C (en) * | 2005-10-20 | 2009-04-22 | 清华大学 | Transmitting and receiving method for signal of orthogonal frequency division multiplexing system |
-
2006
- 2006-09-07 CN CN200610127688A patent/CN100589471C/en not_active Expired - Fee Related
-
2007
- 2007-06-07 WO PCT/CN2007/001808 patent/WO2008031311A1/en active Application Filing
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101534271B (en) * | 2008-03-14 | 2012-07-18 | 中兴通讯股份有限公司 | Method for supporting high-speed mobility in wireless communication system |
| CN107925646A (en) * | 2015-07-27 | 2018-04-17 | 高通股份有限公司 | The narrow-band operation of sample rate with reduction |
| CN107623652A (en) * | 2016-07-14 | 2018-01-23 | 中兴通讯股份有限公司 | A kind of data transmission method and device |
| CN107623652B (en) * | 2016-07-14 | 2022-01-11 | 中兴通讯股份有限公司 | Data transmission method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2008031311A1 (en) | 2008-03-20 |
| CN100589471C (en) | 2010-02-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109150480B (en) | Phase tracking reference signal processing method and device | |
| US11937292B2 (en) | Signaling of random access preamble parameters in wireless networks | |
| JP6138901B2 (en) | Efficient multiplexing of reference signals and data in wireless communication systems | |
| KR101312443B1 (en) | Transmission of reference signal on non-contiguous clusters of resources | |
| RU2315433C1 (en) | Device and method for receiving/transmitting pilot-signal through communication uplink in communication system using orthogonal frequency division multi-access circuit | |
| US9788315B2 (en) | Method and apparatus for allocating resource of multiple carriers in OFDMA system | |
| KR101350623B1 (en) | Method of Transmitting Scheduling Reference Signal | |
| US8218496B2 (en) | Random access cyclic prefix dimensioning in wireless networks | |
| EP1876730A1 (en) | Bandwidth asymmetric communication system | |
| US20070189404A1 (en) | Method and apparatus for pilot signal transmission | |
| EP2347538B1 (en) | Method and apparatus for generating a preamble for use in cable transmission systems | |
| WO2009039383A2 (en) | Reference signal structure for ofdm based transmissions | |
| JP2011523246A (en) | Pilot design using Costas array | |
| US10536314B2 (en) | OFDMA apparatus and method thereof for performing OFDM based communication in wireless communication system | |
| KR20070080538A (en) | Method for transmitting pilot for multiple crrier system | |
| US10756878B2 (en) | Communication method and communications apparatus | |
| KR20090079948A (en) | Method for allocating pilots | |
| KR20050103099A (en) | Apparatus and method for providing broadcast service in a mobile communication system | |
| EP2591636A1 (en) | Method and apparatus for receiving physical uplink control channel in lte system | |
| RU2011125596A (en) | DEVICE AND METHOD FOR DATA TRANSFER IN A WIRELESS COMMUNICATION SYSTEM | |
| WO2007083272A1 (en) | Radio communication system | |
| CN101141430A (en) | Circulation prefix parameter setting method for wireless signal framing | |
| EP3657746A1 (en) | Transmitting device and method thereof | |
| CN100571240C (en) | A kind of circulation prefix parameter setting method of wireless signal framing | |
| CN108282439B (en) | Signal sending and receiving method and device |
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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100210 Termination date: 20200907 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |