CN117640313A - Signal processing method and device - Google Patents
Signal processing method and device Download PDFInfo
- Publication number
- CN117640313A CN117640313A CN202211021969.8A CN202211021969A CN117640313A CN 117640313 A CN117640313 A CN 117640313A CN 202211021969 A CN202211021969 A CN 202211021969A CN 117640313 A CN117640313 A CN 117640313A
- Authority
- CN
- China
- Prior art keywords
- signal
- spreading
- sequences
- spreading sequences
- spread spectrum
- 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.)
- Pending
Links
- 238000003672 processing method Methods 0.000 title claims abstract description 14
- 230000007480 spreading Effects 0.000 claims abstract description 291
- 238000000034 method Methods 0.000 claims abstract description 91
- 238000001228 spectrum Methods 0.000 claims description 74
- 238000012545 processing Methods 0.000 claims description 71
- 230000015654 memory Effects 0.000 claims description 34
- 239000011159 matrix material Substances 0.000 claims description 16
- 238000004590 computer program Methods 0.000 claims description 15
- 230000010363 phase shift Effects 0.000 claims description 6
- 125000004122 cyclic group Chemical group 0.000 claims description 5
- 238000004891 communication Methods 0.000 description 54
- 230000006870 function Effects 0.000 description 19
- 238000010586 diagram Methods 0.000 description 17
- 238000005516 engineering process Methods 0.000 description 16
- 230000005540 biological transmission Effects 0.000 description 10
- 238000013507 mapping Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 10
- 230000000737 periodic effect Effects 0.000 description 8
- 238000007726 management method Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 230000003993 interaction Effects 0.000 description 3
- 238000012887 quadratic function Methods 0.000 description 3
- 238000013473 artificial intelligence Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 239000004984 smart glass Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
The embodiment of the application is applied to a wireless local area network system supporting the 802.11ax next generation Wi-Fi protocol, such as 802.11be, wi-Fi7 or EHT,802.11be next generation, wi-Fi8 and other 802.11 series protocols, and can also be applied to a wireless personal area network system based on UWB and a sensing system. The embodiment of the application provides a signal processing method and device, wherein the method comprises the following steps: receiving a first signal obtained according to a spreading sequence set and N data symbols, wherein the spreading sequence set comprises M spreading sequences with the length of L, the M spreading sequences are in one-to-one correspondence with the M data symbols with different values, and the values of the first chips of any two of the M spreading sequences are the same; and carrying out frequency offset estimation according to the first signal. According to the method, the first signal comprises fixed signal segments, so that the receiving end equipment can perform frequency offset estimation according to the first signal.
Description
The present application claims priority from the chinese patent application filed at 2022, month 08 and 19, to the chinese national intellectual property office, application No. 202211000990.X, application name "signal processing method and apparatus", the entire contents of which are incorporated herein by reference.
Technical Field
The embodiment of the application relates to the field of communication, and more particularly, to a signal processing method and device.
Background
Ultra Wideband (UWB) technology is a wireless carrier communication technology that uses non-sinusoidal narrow pulses at the nanosecond level to transmit data. Because the UWB technology adopts narrower pulse and lower radiation spectrum density for transmitting data, the UWB technology has the advantages of strong multipath resolution capability, low power consumption, strong confidentiality and the like, and the communication through the UWB technology becomes one of the hot physical layer technologies of a short-distance and high-speed wireless network.
Since the communication bandwidth of a device that communicates using UWB technology is large, the power consumption of the device is high. In order to reduce the power consumption of the UWB system, a Narrowband (NB) signal assisted manner may be adopted, where all signals except for the reference signal for ranging and sensing are transceived through the narrowband system, so as to reduce the overall power consumption overhead.
In the scenario of using narrowband signals to assist UWB, if the receiving end device can estimate carrier frequency offset (carrier frequency offset, CFO) from the received narrowband signals, the receiving end device can perform channel compensation according to the CFO and receive UWB signals. Furthermore, after the receiving end device receives the UWB signal, the phase compensation may be performed on the UWB signal according to the CFO. However, based on the existing scheme of transmitting narrowband signals, the receiving end device cannot estimate CFO from the received narrowband signals.
Disclosure of Invention
The embodiment of the application provides a signal processing method and device, so that a receiving end device can estimate carrier frequency offset according to a received signal.
In a first aspect, a signal processing method is provided, which may be performed by a communication device, or may also be performed by a component (e.g., a chip or a circuit) of the communication device, which is not limited. For convenience of description, an example will be described below as being executed by the receiving-end apparatus.
The method may include: receiving a first signal, wherein the first signal is obtained according to a spread spectrum sequence set and N data symbols, the spread spectrum sequence set comprises M spread spectrum sequences with the length of L, the M spread spectrum sequences with the length of L are in one-to-one correspondence with the M data symbols with different values, the values of first chips included in any two spread spectrum sequences with the length of L in the M spread spectrum sequences are the same, N, M and L are positive integers, and l=1, or l=L; and carrying out frequency offset estimation according to the first signal.
The values of the first chips included in any two spreading sequences with the length L are the same, which can be understood that the value of the first chip included in each spreading sequence in the spreading sequence set is a fixed value, or can be understood that the value of the last chip included in each spreading sequence in the spreading sequence set is a fixed value.
Based on the above technical solution, because the value of the first chip of each spreading sequence in the spreading sequence set is a fixed value, or the value of the last chip of each spreading sequence in the spreading sequence set is a fixed value, the transmitting end device obtains, according to the spreading sequence set and the N data symbols, that the first signal includes periodic fixed signal segments, so that the receiving end device can perform frequency offset estimation according to the periodic fixed signal segments included in the first signal.
In addition, compared with a mode of periodically inserting a section of known fixed chip sequence to realize frequency offset estimation, the method provided by the embodiment of the application does not increase extra overhead, so that the transmission time of an air interface is not increased.
With reference to the first aspect, in certain implementation manners of the first aspect, the first signal is obtained by modulating a second signal, the second signal is obtained by performing spreading processing on the N data symbols according to the spreading sequence set, the second signal includes a first sub-signal and a second sub-signal, the first sub-signal is obtained by performing spreading processing on 2n+1th data symbols in the N data symbols according to a first spreading sequence in the spreading sequence set, the first spreading sequence corresponds to the 2n+1th data symbols, N is an integer, and N is equal to or greater than 0 and equal to or less than (N-1)/2; the second sub-signal is obtained by performing spreading processing on the 2N data symbol in the N symbols according to a second spreading sequence, the second spreading sequence is obtained by performing first processing on a third spreading sequence corresponding to the 2N data symbol in the spreading sequence set, and the value of the |l- (l+1) | chip included in the second spreading sequence is the same as the value of the first chip included in the third spreading sequence.
Based on the above-mentioned technical solution, since the value of the first chip included in the first spreading sequence is the same as the value of the first chip included in the third spreading sequence, and the value of the first chip included in the third spreading sequence is the same as the value of the |l- (l+1) | chip included in the second spreading sequence, the value of the first chip included in the first spreading sequence is the same as the value of the |l- (l+1) | chip included in the second spreading sequence, that is, the values of two chips between two consecutive data symbols are fixed. Furthermore, even if the first signal is obtained by performing offset quadrature phase shift keying (O-QPSK) modulation on the second signal, the first signal may also include periodic fixed signal segments, so that the receiving end device may perform frequency offset estimation according to the periodic fixed signal segments included in the first signal.
With reference to the first aspect, in certain implementations of the first aspect, the first processing includes cyclic shifting and/or inverting.
With reference to the first aspect, in certain implementations of the first aspect, a hamming distance between any two different spreading sequences in the set of spreading sequences is not less than 8.
Based on the technical scheme, the minimum Hamming distance of the spread spectrum sequence set is not less than 8, so that the difference of the spread spectrum sequences corresponding to different data symbols is larger, the probability of misjudgment of the data symbols by receiving end equipment can be reduced, and the transmission performance of the system is improved.
With reference to the first aspect, in certain implementations of the first aspect, l=16, m=16, and in the matrix formed by the M spreading sequences with length L, each column except the first column includes 8 1 s and 8 0 s, and each row of the matrix corresponds to one spreading sequence in the set of spreading sequences.
Based on the above technical solution, if the M spreading sequences with length L form a matrix, each of the other columns except the first column includes 8 1 and 8 0, it is ensured that the hamming distance between any two spreading sequences included in the spreading sequence set is not less than 8.
With reference to the first aspect, in certain implementations of the first aspect, l=1, the set of spreading sequences includes the following spreading sequences: {1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1},{1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0},{1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0},{1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1},{1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0},{1 0 1 0 0 1 0 1 1 0 1 0 0 1 0 1},{1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1},{1 0 0 1 0 1 1 0 1 0 0 1 0 1 1 0},{1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0},{1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1},{1 1 0 0 1 1 0 0 0 0 1 1 0 0 1 1},{1 0 0 1 1 0 0 1 0 1 1 0 0 1 1 0},{1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1},{1 0 1 0 0 1 0 1 0 1 0 1 1 0 1 0},{1 1 0 0 0 0 1 1 0 0 1 1 1 1 0 0},{1 0 0 1 0 1 1 0 0 1 1 0 1 0 0 1}.
With reference to the first aspect, in certain implementations of the first aspect, l=l, the set of spreading sequences includes the following spreading sequences: {1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1},{0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1},{0 1 0 0 1 1 0 0 1 1 0 0 1 1 0 1},{1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1},{0 1 1 1 0 0 0 0 1 1 1 1 0 0 0 1},{1 0 1 0 0 1 0 1 1 0 1 0 0 1 0 1},{1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1},{0 0 0 1 0 1 1 0 1 0 0 1 0 1 1 1},{0 1 1 1 1 1 1 1 0 0 0 0 0 0 0 1},{1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1},{1 1 0 0 1 1 0 0 0 0 1 1 0 0 1 1},{0 0 0 1 1 0 0 1 0 1 1 0 0 1 1 1},{1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1},{0 0 1 0 0 1 0 1 0 1 0 1 1 0 1 1},{0 1 0 0 0 0 1 1 0 0 1 1 1 1 0 1},{1 0 0 1 0 1 1 0 0 1 1 0 1 0 0 1}.
With reference to the first aspect, in certain implementations of the first aspect, l=1, the set of spreading sequences includes the following spreading sequences: {1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1},{1 1 1 1 0 1 1 0 0 1 0 1 0 0 0 0},{1 0 1 1 1 0 1 1 0 0 1 0 1 0 0 0},{1 0 0 1 1 1 0 1 1 0 0 1 0 1 0 0},{1 0 0 0 1 1 1 0 1 1 0 0 1 0 1 0},{1 0 0 0 0 1 1 1 0 1 1 0 0 1 0 1},{1 1 0 0 0 0 1 1 1 0 1 1 0 0 1 0},{1 0 1 0 0 0 0 1 1 1 0 1 1 0 0 1},{1 1 0 1 0 0 0 0 1 1 1 0 1 1 0 0},{1 0 1 0 1 0 0 0 0 1 1 1 0 1 1 0},{1 0 0 1 0 1 0 0 0 0 1 1 1 0 1 1},{1 1 0 0 1 0 1 0 0 0 0 1 1 1 0 1},{1 1 1 0 0 1 0 1 0 0 0 0 1 1 1 0},{1 0 1 1 0 0 1 0 1 0 0 0 0 1 1 1},{1 1 0 1 1 0 0 1 0 1 0 0 0 0 1 1},{1 1 1 0 1 1 0 0 1 0 1 0 0 0 0 1}.
With reference to the first aspect, in certain implementations of the first aspect, l=l, the set of spreading sequences includes the following spreading sequences: {1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1},{0 1 1 1 0 1 1 0 0 1 0 1 0 0 0 1},{0 0 1 1 1 0 1 1 0 0 1 0 1 0 0 1},{0 0 0 1 1 1 0 1 1 0 0 1 0 1 0 1},{0 0 0 0 1 1 1 0 1 1 0 0 1 0 1 1},{1 0 0 0 0 1 1 1 0 1 1 0 0 1 0 1},{0 1 0 0 0 0 1 1 1 0 1 1 0 0 1 1},{1 0 1 0 0 0 0 1 1 1 0 1 1 0 0 1},{0 1 0 1 0 0 0 0 1 1 1 0 1 1 0 1},{0 0 1 0 1 0 0 0 0 1 1 1 0 1 1 1},{1 0 0 1 0 1 0 0 0 0 1 1 1 0 1 1},{1 1 0 0 1 0 1 0 0 0 0 1 1 1 0 1},{0 1 1 0 0 1 0 1 0 0 0 0 1 1 1 1},{1 0 1 1 0 0 1 0 1 0 0 0 0 1 1 1},{1 1 0 1 1 0 0 1 0 1 0 0 0 0 1 1},{1 1 1 0 1 1 0 0 1 0 1 0 0 0 0 1}.
With reference to the first aspect, in certain implementations of the first aspect, the first signal is obtained by performing offset quadrature phase shift keying modulation on the second signal.
With reference to the first aspect, in certain implementations of the first aspect, the N data symbols are derived from data bits included in a physical layer protocol data unit (physical protocol data unit, PPDU), the receiving the first signal includes: the first signal is received through a narrowband.
Based on the above technical solution, in an application scenario of Ultra Wideband (UWB) through narrowband assistance, the receiving end device receives the first signal through narrowband, and then may perform frequency offset estimation according to the first signal. Further, the receiving end device may perform channel compensation according to the estimated carrier frequency offset, thereby assisting the receiving end device in receiving the UWB signal. After the receiving end device receives the UWB signal, the phase compensation may also be performed on the UWB signal according to the estimated carrier frequency offset.
In a second aspect, a signal processing method is provided, which may be performed by a communication device, or may also be performed by a component (e.g., a chip or a circuit) of the communication device, which is not limited thereto. For convenience of description, an example will be described below as being executed by the transmitting-end apparatus.
The method may include: obtaining a first signal according to a spreading sequence set and N data symbols, wherein the spreading sequence set comprises M spreading sequences with the length of L, the M spreading sequences with the length of L are in one-to-one correspondence with the M data symbols with different values, the values of the first chips included in any two spreading sequences with the length of L in the M spreading sequences are the same, N, M and L are positive integers, and l=1 or l=L; the first signal is transmitted.
The advantages of the second aspect and any possible implementation of the second aspect may be referred to the first aspect.
With reference to the second aspect, in some implementations of the second aspect, obtaining the first signal according to the set of spreading sequences and the N data symbols includes: performing spread spectrum processing on the N data symbols according to the spread spectrum sequence set to obtain a second signal; modulating the second signal to obtain the first signal; the second signal comprises a first sub-signal and a second sub-signal, the first sub-signal is obtained by performing spread spectrum processing on 2n+1th data symbol in the N data symbols according to a first spread spectrum sequence in the spread spectrum sequence set, the first spread spectrum sequence corresponds to the 2n+1th data symbol, N is an integer, and N is more than or equal to 0 and less than or equal to (N-1)/2; the second sub-signal is obtained by performing spreading processing on the 2N data symbol in the N symbols according to a second spreading sequence, the second spreading sequence is obtained by performing first processing on a third spreading sequence corresponding to the 2N data symbol in the spreading sequence set, and the value of the |l- (l+1) | chip included in the second spreading sequence is the same as the value of the first chip included in the third spreading sequence.
With reference to the second aspect, in certain implementations of the second aspect, the first processing includes cyclic shifting and/or inverting.
With reference to the second aspect, in certain implementations of the second aspect, a hamming distance between any two different spreading sequences in the set of spreading sequences is not less than 8.
With reference to the second aspect, in certain implementations of the second aspect, l=16, m=16, and each of the columns except the first column includes 8 1 s and 8 0 s in a matrix of the M spreading sequences of length L, and each row of the matrix corresponds to one spreading sequence in the set of spreading sequences.
With reference to the second aspect, in certain implementations of the second aspect, l=1, the set of spreading sequences includes the following spreading sequences: {1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1},{1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0},{1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0},{1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1},{1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0},{1 0 1 0 0 1 0 1 1 0 1 0 0 1 0 1},{1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1},{1 0 0 1 0 1 1 0 1 0 0 1 0 1 1 0},{1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0},{1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1},{1 1 0 0 1 1 0 0 0 0 1 1 0 0 1 1},{1 0 0 1 1 0 0 1 0 1 1 0 0 1 1 0},{1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1},{1 0 1 0 0 1 0 1 0 1 0 1 1 0 1 0},{1 1 0 0 0 0 1 1 0 0 1 1 1 1 0 0},{1 0 0 1 0 1 1 0 0 1 1 0 1 0 0 1}.
With reference to the second aspect, in certain implementations of the second aspect, l=l, the set of spreading sequences includes the following spreading sequences: {1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1},{0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1},{0 1 0 0 1 1 0 0 1 1 0 0 1 1 0 1},{1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1},{0 1 1 1 0 0 0 0 1 1 1 1 0 0 0 1},{1 0 1 0 0 1 0 1 1 0 1 0 0 1 0 1},{1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1},{0 0 0 1 0 1 1 0 1 0 0 1 0 1 1 1},{0 1 1 1 1 1 1 1 0 0 0 0 0 0 0 1},{1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1},{1 1 0 0 1 1 0 0 0 0 1 1 0 0 1 1},{0 0 0 1 1 0 0 1 0 1 1 0 0 1 1 1},{1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1},{0 0 1 0 0 1 0 1 0 1 0 1 1 0 1 1},{0 1 0 0 0 0 1 1 0 0 1 1 1 1 0 1},{1 0 0 1 0 1 1 0 0 1 1 0 1 0 0 1}.
With reference to the second aspect, in certain implementations of the second aspect, l=1, the set of spreading sequences includes the following spreading sequences: {1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1},{1 1 1 1 0 1 1 0 0 1 0 1 0 0 0 0},{1 0 1 1 1 0 1 1 0 0 1 0 1 0 0 0},{1 0 0 1 1 1 0 1 1 0 0 1 0 1 0 0},{1 0 0 0 1 1 1 0 1 1 0 0 1 0 1 0},{1 0 0 0 0 1 1 1 0 1 1 0 0 1 0 1},{1 1 0 0 0 0 1 1 1 0 1 1 0 0 1 0},{1 0 1 0 0 0 0 1 1 1 0 1 1 0 0 1},{1 1 0 1 0 0 0 0 1 1 1 0 1 1 0 0},{1 0 1 0 1 0 0 0 0 1 1 1 0 1 1 0},{1 0 0 1 0 1 0 0 0 0 1 1 1 0 1 1},{1 1 0 0 1 0 1 0 0 0 0 1 1 1 0 1},{1 1 1 0 0 1 0 1 0 0 0 0 1 1 1 0},{1 0 1 1 0 0 1 0 1 0 0 0 0 1 1 1},{1 1 0 1 1 0 0 1 0 1 0 0 0 0 1 1},{1 1 1 0 1 1 0 0 1 0 1 0 0 0 0 1}.
With reference to the second aspect, in certain implementations of the second aspect, l=l, the set of spreading sequences includes the following spreading sequences: {1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1},{0 1 1 1 0 1 1 0 0 1 0 1 0 0 0 1},{0 0 1 1 1 0 1 1 0 0 1 0 1 0 0 1},{0 0 0 1 1 1 0 1 1 0 0 1 0 1 0 1},{0 0 0 0 1 1 1 0 1 1 0 0 1 0 1 1},{1 0 0 0 0 1 1 1 0 1 1 0 0 1 0 1},{0 1 0 0 0 0 1 1 1 0 1 1 0 0 1 1},{1 0 1 0 0 0 0 1 1 1 0 1 1 0 0 1},{0 1 0 1 0 0 0 0 1 1 1 0 1 1 0 1},{0 0 1 0 1 0 0 0 0 1 1 1 0 1 1 1},{1 0 0 1 0 1 0 0 0 0 1 1 1 0 1 1},{1 1 0 0 1 0 1 0 0 0 0 1 1 1 0 1},{0 1 1 0 0 1 0 1 0 0 0 0 1 1 1 1},{1 0 1 1 0 0 1 0 1 0 0 0 0 1 1 1},{1 1 0 1 1 0 0 1 0 1 0 0 0 0 1 1},{1 1 1 0 1 1 0 0 1 0 1 0 0 0 0 1}.
With reference to the second aspect, in some implementations of the second aspect, modulating the second signal to obtain the first signal includes: and performing offset quadrature phase shift keying modulation on the second signal to obtain the first signal.
With reference to the second aspect, in some implementations of the second aspect, the N data symbols are derived from data bits included in the PPDU, and the transmitting the first signal includes: the first signal is transmitted over a narrowband.
In a third aspect, there is provided an apparatus for performing the method provided in any one of the first to second aspects above. In particular, the apparatus may comprise means and/or modules, such as a processing unit and/or a transceiver unit, for performing the method provided in the first aspect or any of the above-mentioned implementations of the first aspect or the second aspect.
In one implementation, the apparatus is a device (e.g., a sender device, and also a receiver device). When the apparatus is a device, the transceiving unit may be a transceiver, or an input/output interface; the processing unit may be at least one processor. Alternatively, the transceiver may be a transceiver circuit. Alternatively, the input/output interface may be an input/output circuit.
In another implementation, the apparatus is a chip, a system-on-chip, or a circuit used in a device (e.g., a sender device, and also e.g., a receiver device). When the apparatus is a chip, a system-on-chip or a circuit used in a device, the transceiver unit may be an input/output interface, an interface circuit, an output circuit, an input circuit, a pin, or a related circuit on the chip, the system-on-chip or the circuit; the processing unit may be at least one processor, processing circuit or logic circuit, etc.
In a fourth aspect, there is provided an apparatus comprising: a memory for storing a program; at least one processor configured to execute a computer program or instructions stored in a memory to perform the method provided in any one of the first to second aspects above.
In one implementation, the apparatus is a device (e.g., a sender device, and also a receiver device).
In another implementation, the apparatus is a chip, a system-on-chip, or a circuit used in a device (e.g., a sender device, and also e.g., a receiver device).
In a fifth aspect, the present application provides a processor configured to perform the method provided in the above aspects.
The operations such as transmitting and/or receiving, etc. related to the processor may be understood as operations such as outputting and receiving, inputting, etc. by the processor, and may be understood as operations such as transmitting and receiving by the radio frequency circuit and the antenna, if not specifically stated, or if not contradicted by actual function or inherent logic in the related description, which is not limited in this application.
In a sixth aspect, there is provided a computer readable storage medium storing program code for execution by a device, the program code when run on a computer causing the method provided in any one of the first to second aspects above to be performed.
In a seventh aspect, there is provided a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method provided in any of the first to second aspects above.
In an eighth aspect, a chip is provided, the chip comprising a processor and a communication interface, the processor reading instructions stored on a memory via the communication interface, performing the method provided in any of the first to second aspects.
Optionally, as an implementation manner, the chip further includes a memory, where a computer program or an instruction is stored in the memory, and the processor is configured to execute the computer program or the instruction stored on the memory, and when the computer program or the instruction is executed, the processor is configured to perform the method provided in any one of the first aspect to the second aspect.
A ninth aspect provides a communication system comprising the above transmitting-end apparatus and receiving-end apparatus.
Drawings
FIG. 1 is a schematic diagram of two application scenarios suitable for use in embodiments of the present application;
fig. 2 is a schematic diagram of a PPDU structure applicable to an embodiment of the present application;
fig. 3 shows a schematic flow diagram of a transmitting end modulating and spreading a signal by O-QPSK modulation;
Fig. 4 shows a schematic diagram of chip offset in O-QPSK modulation;
fig. 5 shows a schematic diagram of a baseband chip sequence formed by pulse shaping of a modulated signal;
fig. 6 shows a schematic flow chart of a signal processing method provided in an embodiment of the present application;
fig. 7 shows a schematic diagram of chip offset in O-QPSK modulation;
FIG. 8 is a schematic diagram of an apparatus 1000 provided in an embodiment of the present application;
fig. 9 is a schematic diagram of an apparatus 2000 provided in an embodiment of the present application;
fig. 10 is a schematic diagram of a chip system 3000 provided in an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.
The technical scheme provided by the application can be applied to a wireless personal area network (wireless personal area network, WPAN), and the standard adopted by the WPAN is an institute of Electrical and electronics Engineers (institute of electrical and electronics engineer, IEEE) 802.15 system. WPAN can be used for communication between digital auxiliary devices in small areas such as telephones, computers, accessory devices, etc., which are typically operated within 10 meters (m). As an example, technologies capable of supporting wireless personal area networks include, but are not limited to: bluetooth (Bluetooth), zigBee (ZigBee), ultra Wideband (UWB), infrared data standards association (infrared data association, irDA) infrared connection technology, home radio frequency (HomeRF), and the like. From a network configuration perspective, a WPAN may be located at the bottom layer of the overall network architecture, and a wireless connection between devices within a small range, i.e., a point-to-point short-range connection, may be considered a short-range wireless communication network. Depending on the application scenario, WPANs may be classified into High Rate (HR) -WPANs and Low Rate (LR) -WPANs, wherein HR-WPANs may be used to support various high rate multimedia applications including high quality audio-visual distribution, multi-megabyte music, and image document delivery, among others. LR-WPAN can be used for general business of daily life.
In WPAN, full-function devices (ffds) and reduced-function devices (RFDs) can be classified according to communication capabilities possessed by the devices. The RFD is mainly used for simple control applications, such as switching of a lamp, a passive infrared sensor and the like, has less transmitted data volume, occupies less transmission resources and communication resources, and has lower cost. The FFDs can communicate with each other, and the FFDs can also communicate with the RFDs. Typically, the RFDs do not communicate directly with each other, but rather communicate with the FFD, or forward data out through one FFD. The FFD associated with an RFD may also be referred to as a coordinator (coordinator) of the RFD. The coordinator may also be referred to as a personal area network (personal area network, PAN) coordinator or central control node, etc. The PAN coordinator is a master control node of the whole network, and one PAN coordinator is arranged in each ad hoc network and is mainly used for membership management, link information management and packet forwarding functions. Alternatively, the devices in embodiments of the present application may be devices that support multiple WPAN systems, such as 802.15.4a and 802.15.4z, as well as the versions now under discussion or later.
In the present application, the above devices may be tags, communication servers, routers, switches, bridges, computers or mobile phones, home intelligent devices, vehicle-mounted communication devices, wearable devices, and the like. Wearable equipment can also be called as wearable intelligent equipment, is the general name of equipment that uses wearable technique to carry out intelligent design, develop wearable to daily wearing, such as glasses, gloves, wrist-watch, dress and shoes etc.. The wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. The wearable device is not only a hardware device, but also can realize a powerful function through software support, data interaction and cloud interaction. The generalized wearable intelligent device includes full functionality, large size, and may not rely on the smart phone to implement complete or partial functionality, such as: smart watches or smart glasses, etc., and focus on only certain types of application functions, and need to be used in combination with other devices, such as smart phones, for example, various smart bracelets, smart jewelry, etc. for physical sign monitoring.
In an embodiment of the present application, the device includes a hardware layer, an operating system layer running above the hardware layer, and an application layer running above the operating system layer. The hardware layer includes hardware such as a central processing unit (central processing unit, CPU), a memory management unit (memory management unit, MMU), and a memory (also referred to as a main memory). The operating system may be any one or more computer operating systems that implement business processes through processes (processes), such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a Windows operating system. The application layer comprises applications such as a browser, an address book, word processing software, instant messaging software and the like. The embodiment of the present application is not particularly limited to the specific configuration of the execution body of the method provided in the embodiment of the present application, as long as the communication can be performed by the method provided in the embodiment of the present application by executing the program recorded with the code of the method provided in the embodiment of the present application, and for example, the execution body of the method provided in the embodiment of the present application may be an FFD or an RFD, or a functional module in the FFD or the RFD that can call the program and execute the program.
The above description of WPAN is merely illustrative, and does not limit the scope of the embodiments of the present application.
The application is applied to wireless local area network systems supporting the IEEE 802.11ax next generation wireless fidelity (wireless fidelity, wi-Fi) protocol, such as 802.11be, wi-Fi 7 or extremely high throughput (extremely high throughput, EHT), and 802.11 series protocols such as 802.11be next generation, wi-Fi 8, wi-Fi artificial intelligence (artificial intelligence, AI) and the like, and can also be applied to wireless personal area network systems based on UWB, sensing (sensing) systems. It should be noted that, hereinafter, the embodiments of the present application will be described by taking an example of application to a UWB-based wireless personal area network system.
It is to be appreciated that the embodiments of the present application may also be applied to other communication systems, such as sixth generation (6th generation,6G) mobile communication systems, fifth generation (5th generation,5G) systems, long term evolution (long term evolution, LTE) systems, and the like. The embodiment of the application can also be used for future communication systems. Embodiments of the present application may also be used for device-to-device (D2D) communications, vehicle-to-device (V2X) communications, machine-to-machine (machine to machine, M2M) communications, machine type communications (machine type communication, MTC), and internet of things (internet of things, ioT) communications systems or other communications systems. The communication system suitable for the present application is not limited thereto, and is generally described herein, and will not be described in detail.
The transmitting device and/or the receiving device in the embodiments of the present application may be a Station (STA) in a wireless local area network (wireless local area network, WLAN). For example, the website may be a mobile phone supporting Wi-Fi communication function, a tablet computer supporting Wi-Fi communication function, a set top box supporting Wi-Fi communication function, a smart television supporting Wi-Fi communication function, a smart wearable device supporting Wi-Fi communication function, a vehicle communication device supporting Wi-Fi communication function, a computer supporting Wi-Fi communication function, and so on. Alternatively, the station may support 802.11be standard. Stations may also support multiple WLAN standards of 802.11 families, such as 802.11be, 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11 a.
In addition, the transmitting end device and/or the receiving end device in the embodiments of the present application may also be an Access Point (AP) in a WLAN, where the AP may be an access point for a terminal device (such as a mobile phone) to enter a wired (or wireless) network, and the AP is mainly deployed in a home, a building, and a campus, where a typical coverage radius is several tens meters to hundreds meters, and of course, may also be deployed outdoors. The access point is equivalent to a bridge connecting a wired network and a wireless network, and is mainly used for connecting all wireless network clients together and then connecting the wireless network into an Ethernet. In particular, the access point may be a terminal device (e.g., a cell phone) or a network device (e.g., a router) with a Wi-Fi chip. The access point may be a device supporting the 802.11be standard. The access point may also be a device that supports multiple WLAN standards of the 802.11 family, such as 802.11be, 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11 a.
The access points and sites may also be devices applied in the internet of things, internet of things nodes, sensors, etc. in the internet of things (internet of things, ioT), intelligent cameras in smart homes, intelligent remote controls, intelligent water meter meters, sensors in smart cities, etc.
An application scenario suitable for the present application is briefly described below with reference to fig. 1.
Fig. 1 is a schematic diagram of two application scenarios provided in the present application. The system 101 shown in fig. 1 (a) is a star topology (star topology) communication system, and the system 102 shown in fig. 1 (B) is a point-to-point topology (peer to peer topology) communication system.
As shown in fig. 1 (a), a plurality of FFDs and a plurality of RFDs may be included in the system 101, which may form a star topology communication system. Wherein, one FFD of the FFDs is a PAN coordinator, and in a star topology communication system, the PAN coordinator can perform data transmission with one or more other devices, i.e. the plurality of devices can establish a one-to-many or many-to-one data transmission architecture.
As shown in fig. 1 (B), a plurality of FFDs and one RFD may be included in the system 102, which may form a communication system of a point-to-point topology. Wherein, one FFD of the plurality of FFDs is a PAN coordinator, and a many-to-many data transmission architecture can be established among a plurality of different devices in a communication system with point-to-point topology.
It should be understood that (a) in fig. 1 and (B) in fig. 1 are simplified schematic diagrams merely illustrated for ease of understanding, and do not constitute a limitation on the application scenario of the present application. For example, other FFDs and/or RFDs, etc. may also be included in the system 101 and/or 102.
UWB technology can transmit data using non-sinusoidal narrow pulses on the order of nanoseconds, which occupy a wide range of frequency spectrum. Because the UWB technology adopts narrower pulse and extremely low radiation spectrum density to transmit data, the UWB technology has the advantages of strong multipath resolution capability, low power consumption, strong confidentiality and the like. Currently, UWB technology has been written in the IEEE 802 series wireless standard, the WPAN standard IEEE 802.15.4a based on UWB technology has been released, and its evolution IEEE 802.15.4z, and the formulation of the next generation WPAN standard 802.15.4ab of UWB technology has also been proposed.
Since UWB technology does not need to use carriers in a conventional communication system, but transmits data by transceiving extremely narrow pulses having nanoseconds or less, which has high requirements for time synchronization of transceiving devices, and since its communication bandwidth is large, power consumption and complexity of devices are high when transceiving signals on an ultra wideband channel are utilized, while most UWB communication devices are driven by a battery, the next generation standard hopes to further reduce power consumption of UWB systems, so that all signals except reference signals for ranging and sensing can be transceived through a narrowband system in a Narrowband (NB) signal-assisted manner, thereby reducing overall power consumption overhead.
Where a narrowband signal refers to a signal where the effective bandwidth of the source signal is much smaller than the carrier frequency or center frequency at which it is located. In actual communication, the frequency band resources allocated to the user equipment+the actual propagation environment, called a channel, also has certain spectral characteristics. In general, the wider the allocated band resources, the more stable the propagation environment, and the higher the data rate that the channel can carry. From the spectrum of the signal waveform, the signal bandwidth (or "source signature") is Δf, the carrier frequency (or "channel signature") is fc, and the system is referred to as a narrowband system when Δf is much smaller than fc. It can be seen that both "narrowband channels" and "narrowband signals" are in fact within the same definition, which complement each other.
Fig. 2 shows a schematic diagram of the structure of a physical protocol data unit (physical protocol data unit, PPDU) of a narrowband signal. As shown in fig. 2, the PPDU of the narrowband signal includes a preamble (preamble), a frame-of-frame delimiter (SFD), a Physical Header (PHR), and a Physical (PHY) bearer (payload) field, which may also be understood as a physical layer service data unit (physical service data unit, PSDU). In addition, the preamble and the frame start spacer may also be collectively referred to as a synchronization header (synchronization header, SHR).
The narrowband signal used to assist UWB may be transmitted using an offset quadrature phase shift keying (O-QPSK) modulation. To enhance system robustness, the transmitting end device maps 4 encoded (or unencoded) bit information onto a spreading sequence of a specific length prior to O-QPSK modulation. And the receiving end device can judge the bit information sent by the sending end device by using the spread spectrum sequence.
Fig. 3 shows a schematic flow chart of a transmitting device modulating and spreading a signal by using O-QPSK modulation. As shown in fig. 3, the transmitting device sequentially obtains a modulated signal (modulated signal) after bit-to-symbol (bit-to-symbol) mapping, symbol-to-chip (symbol-to-chip) mapping, and O-QPSK modulation (O-QPSK modulator) on binary data (binary data) in the PPDU, and then the transmitting device transmits the modulated signal.
Specifically, in the process of performing bit-to-symbol mapping on the data generated by two bits in the PPDU, the transmitting end device maps the binary data in the PPDU into a data symbol (data symbol) according to a group of every 4 bits. For example, the transmitting end may map the binary 4 bits "0000" to the data symbol "0" according to the mapping relationship shown in table 1, and for example, the transmitting end may map the binary 4 bits "1000" to the data symbol "1" according to the mapping relationship shown in table 1. In the process of mapping symbols to chips, the transmitting end device maps each data symbol into a spreading sequence with the length of 16. For example, according to the mapping relationship shown in table 1, the transmitting device may map the data symbol "0" to the spreading sequence {0011 1110 0010 0101}.
TABLE 1
| Binary bit (b) 0 b 1 b 2 b 3 ) | Data symbols | Chip values (c) 0 c 1 …c 5 ) |
| 0000 | 0 | 0011 1110 0010 0101 |
| 1000 | 1 | 0100 1111 1000 1001 |
| 0100 | 2 | 0101 0011 1110 0010 |
| 1100 | 3 | 1001 0100 1111 1000 |
| 0010 | 4 | 0010 0101 0011 1110 |
| 1010 | 5 | 1000 1001 0100 1111 |
| 0110 | 6 | 1110 0010 0101 0011 |
| 1110 | 7 | 1111 1000 1001 0100 |
| 0001 | 8 | 0110 1011 0111 0000 |
| 1001 | 9 | 0001 1010 1101 1100 |
| 0101 | 10 | 0000 0110 1011 0111 |
| 1101 | 11 | 1100 0001 1010 1101 |
| 0011 | 12 | 0111 0000 0110 1011 |
| 1011 | 13 | 1101 1100 0001 1010 |
| 0111 | 14 | 1011 0111 0000 0110 |
| 1111 | 15 | 1010 1101 1100 0001 |
Fig. 4 shows a schematic diagram of chip offset in O-QPSK modulation. As shown in fig. 4, in the O-QPSK modulation, an even-digital slice is modulated to an in-phase (I-phase) carrier andon the quadrature-phase (Q-phase) carrier. The chips on the quadrature carrier are delayed by one chip time (i.e., T c ) Thereby forming an offset of the in-phase chip modulation and the quadrature chip modulation. The modulated signal is pulse formed to form a baseband chip sequence. When half sine function pulse shaping is employed, the resulting baseband chip sequence is shown in fig. 5, where j in fig. 5 represents an imaginary unit.
In the scenario of using narrowband signals to assist UWB, if the receiving end device can estimate carrier frequency offset (carrier frequency offset, CFO) from the received narrowband signals, the receiving end device can perform channel compensation according to the CFO and receive UWB signals. Furthermore, after the receiving end device receives the UWB signal, the phase compensation may be performed on the UWB signal according to the CFO. However, based on the existing scheme of transmitting narrowband signals, the receiving end device cannot estimate CFO for the narrowband signals received.
In view of this, the embodiments of the present application provide a signal processing method, so that a receiving end device may estimate a carrier frequency offset according to a received signal.
The following description is made to facilitate understanding of the embodiments of the present application.
The first and second embodiments are shown in this application for convenience of description only, and are not intended to limit the scope of the embodiments of the present application, for example, to distinguish between different spreading sequences, etc., and are not intended to describe a particular order or sequencing. It is to be understood that the objects so described may be interchanged where appropriate to enable description of aspects other than those of the embodiments of the application.
The term "and/or" is herein merely an association relationship describing an associated object, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship. Also, in the description of the present application, unless otherwise indicated, "a plurality" means two or more than two.
The signal processing method provided in the embodiment of the present application is described in detail below by taking interaction between a transmitting end device and a receiving end device as an example without loss of generality.
By way of example and not limitation, the sender device may be a communication-capable device in a WPAN, such as an FFD or RFD; similarly, the receiving device may also be a device with communication capability in a WPAN, such as FFD or RFD.
It should be understood that, in the embodiments of the present application, specific types of the transmitting end device and the receiving end device are not limited, and a communication device having a function of receiving and transmitting signals may be used.
Fig. 6 is a schematic flowchart of a signal processing method 600 provided in an embodiment of the present application, including the following steps:
and S610, the transmitting end equipment obtains a first signal according to the spread spectrum sequence set and the N data symbols.
The spreading sequence set comprises M spreading sequences with the length of L, the M spreading sequences with the length of L are in one-to-one correspondence with M data symbols with different values, the values of the first chips included in any two of the M spreading sequences with the length of L are the same, N, M and L are positive integers, l=1, or l=L. In other words, the value of the first chip included in each spreading sequence in the set of spreading sequences is a fixed value, or the value of the last chip included in each spreading sequence in the set of spreading sequences is a fixed value. The fixed value is illustratively 1 or 0. The length of the spreading sequence is L, which is also understood to be L chips.
The N data symbols are determined from N 'data bits, N' being a positive integer. Illustratively, one of the N data symbols is mapped from 4 of the N 'data bits, and a different one of the N data symbols is mapped from a different one of the N' data bits. Wherein mapping 4 data bits to obtain one data symbol means mapping 4 bits of binary data to one decimal data symbol.
Illustratively, the N 'data bits are data bits included in the PPDU, i.e., the N' data bits include: the data bits constituting the preamble in the PPDU, the data bits constituting the SFD in the PPDU, the data bits constituting the PHR in the PPDU, and the data bits constituting the payload in the PPDU.
It will be appreciated that since 4 bits may constitute 16 different binary data, in the case where one data symbol is mapped from 4 data bits, there are 16 possible values of the data symbol, i.e., the possible values of the data symbol are 0 to 15. Further, in order to implement spreading processing for data symbols with different values, the spreading sequence set may include 16 spreading sequences with a length L.
It should be understood that the set of spreading sequences may also include a greater number of spreading sequences, or include a lesser number of spreading sequences, which is not limited in this embodiment, for example, if one data symbol is mapped from 2 data bits, the set of spreading sequences may include 4 spreading sequences of length L. For another example, if one data symbol is mapped by 8 data bits, the spreading sequence set may include 64 spreading sequences of length L.
Alternatively, the minimum Hamming distance (Hamming distance) of the set of spreading sequences is not less than 8, in other words, the Hamming distance between any two spreading sequences in the set of spreading sequences is not less than 8. The minimum value of the hamming distance between any two spreading sequences in the set of spreading sequences is called the minimum hamming distance of the set of spreading sequences. The hamming distance between two spreading sequences is the number of chips with different values at the corresponding positions of the two spreading sequences. In other words, the hamming distance between two sequences is the number of chips that need to be replaced to transform one spreading sequence into another. For example, the Hamming distance between the spreading sequence {1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1} and the spreading sequence {1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0} is 8.
The spreading sequence set includes M spreading sequences, and when the spreading sequences included in the spreading sequence set are combined in pairs, M (M-1)/2 different spreading sequence combinations may be formed in total. Assuming that the value of the ith chip included in each of the k spreading sequences is 1, the value of the ith chip included in each of the (M-k) spreading sequences is 0, the sum of hamming distances contributed by the combination of the (M-1)/2 spreading sequences of the ith chip is equal to k (M-k), the k spreading sequences and the (M-k) spreading sequences all belong to the M spreading sequences, k is a positive integer, 1.ltoreq.i.ltoreq.l, and i is not equal to L.
Further, when k is an argument of a quadratic function, and the sum of hamming distances contributed by the combination of M (M-1)/2 spreading sequences is used as an argument of the quadratic function, and M is used as a coefficient, it is known from the property of the quadratic function that when k=m/2, the sum of hamming distances contributed by the combination of M (M-1)/2 spreading sequences is the largest for the i-th chip (equal to M 2 /4). As described above, the value of the first chip of each of the M spreading sequences is a fixed value, or the value of the last chip of each of the M spreading sequences is a fixed value, that is, in the case where the length of the spreading sequence is L, the number of chips capable of contributing a hamming distance to the M (M-1)/2 spreading sequence combinations is (L-1), and thus, the maximum value of the sum of the hamming distances of the M (M-1)/2 spreading sequence combinations is Furthermore, it is known that the Hamming distance between any two spreading sequences in the set of spreading sequences is not more than +.>
As can be seen from the above, if m=16, the minimum hamming distance of the set of spreading sequences is not greater than 8 (L-1)/15. Thus, to ensure that the hamming distance between any two spreading sequences in the set of spreading sequences is not less than 8, the length L of the spreading sequences is at least 16.
Illustratively, the length L of the spreading sequence is 16. Based on the above analysis, if l=16, in order to ensure that the hamming distance between any two spreading sequences in the set of spreading sequences is not less than 8, the value of the i-th chip of M/2 of the M spreading sequences is 1, and the value of the i-th chip of M/2 of the M spreading sequences is 0. If each of the M spreading sequences is taken as one row of the matrix, the ith column of the matrix made up of the set of spreading sequences includes M/2 1 s and M/2 0 s, in other words, since i is not equal to l, each of the remaining columns of the matrix made up of the set of spreading sequences except the ith column includes M/2 1 s and M/2 0 s. For example, if m=16, l=16, then each of the remaining columns except the first column in the matrix consisting of the set of spreading sequences includes 8 1 s and 8 0 s.
Exemplary, m=16, l=16, and the set of spreading sequences provided in the embodiments of the present application include spreading sequences as shown in table 2. Table 2 also shows one example of correspondence between spreading sequences and data symbols.
TABLE 2
| Data symbols | Chip value (c) 0 c 1 …c 5 ) |
| 0 | 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 |
| 1 | 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 |
| 2 | 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 |
| 3 | 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 |
| 4 | 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 |
| 5 | 1 0 1 0 0 1 0 1 1 0 1 0 0 1 0 1 |
| 6 | 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 |
| 7 | 1 0 0 1 0 1 1 0 1 0 0 1 0 1 1 0 |
| 8 | 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 |
| 9 | 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 |
| 10 | 1 1 0 0 1 1 0 0 0 0 1 1 0 0 1 1 |
| 11 | 1 0 0 1 1 0 0 1 0 1 1 0 0 1 1 0 |
| 12 | 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 |
| 13 | 1 0 1 0 0 1 0 1 0 1 0 1 1 0 1 0 |
| 14 | 1 1 0 0 0 0 1 1 0 0 1 1 1 1 0 0 |
| 15 | 1 0 0 1 0 1 1 0 0 1 1 0 1 0 0 1 |
Set of 16 spreading sequences shown in Table 2Matrix H formed 1 Can be expressed as:
as can be seen, matrix H 1 Each of the 2 nd to 16 th columns includes 8 1 s and 8 0 s.
Also exemplary, m=16, l=16, and the set of spreading sequences provided in the embodiments of the present application include the sequences shown in table 3. Table 3 also shows one example of correspondence between spreading sequences and data symbols.
TABLE 3 Table 3
| Data symbols | Chip value (c) 0 c 1 …c 5 ) |
| 0 | 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 |
| 1 | 1 1 1 1 0 1 1 0 0 1 0 1 0 0 0 0 |
| 2 | 1 0 1 1 1 0 1 1 0 0 1 0 1 0 0 0 |
| 3 | 1 0 0 1 1 1 0 1 1 0 0 1 0 1 0 0 |
| 4 | 1 0 0 0 1 1 1 0 1 1 0 0 1 0 1 0 |
| 5 | 1 0 0 0 0 1 1 1 0 1 1 0 0 1 0 1 |
| 6 | 1 1 0 0 0 0 1 1 1 0 1 1 0 0 1 0 |
| 7 | 1 0 1 0 0 0 0 1 1 1 0 1 1 0 0 1 |
| 8 | 1 1 0 1 0 0 0 0 1 1 1 0 1 1 0 0 |
| 9 | 1 0 1 0 1 0 0 0 0 1 1 1 0 1 1 0 |
| 10 | 1 0 0 1 0 1 0 0 0 0 1 1 1 0 1 1 |
| 11 | 1 1 0 0 1 0 1 0 0 0 0 1 1 1 0 1 |
| 12 | 1 1 1 0 0 1 0 1 0 0 0 0 1 1 1 0 |
| 13 | 1 0 1 1 0 0 1 0 1 0 0 0 0 1 1 1 |
| 14 | 1 1 0 1 1 0 0 1 0 1 0 0 0 0 1 1 |
| 15 | 1 1 1 0 1 1 0 0 1 0 1 0 0 0 0 1 |
Matrix H of 16 spreading sequences shown in Table 3 2 Can be expressed as:
as can be seen, matrix H 2 Each of the 2 nd to 16 th columns includes 8 1 s and 8 0 s.
It should be noted that, the correspondence between the spreading sequences and the data symbols with different values shown in table 2 and table 3 is only an example, and the embodiment of the present application does not limit this, and only needs to satisfy one-to-one correspondence between the spreading sequences and the data symbols with different values. For example, another example of the correspondence between the spreading sequences shown in table 2 and the data symbols having different values is as follows: the 1 st spreading sequence {1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1} shown in table 2 corresponds to a data symbol having a value of 15, the 2 nd spreading sequence {1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0} shown in table 2 corresponds to a data symbol having a value of 14, … …, and the 16 th spreading sequence {1 0 0 1 0 1 1 0 0 1 1 0 1 0 0 1} shown in table 2 corresponds to a data symbol having a value of 0.
It should be further noted that the spreading sequences shown in table 2 and table 3 are only examples, and the embodiments of the present application do not limit the specific form of the spreading sequences included in the spreading sequence set, and it is sufficient that the value of the first chip of each spreading sequence in the spreading sequence set is a fixed value, and optionally, it is sufficient that the hamming distance between any two spreading sequences in the spreading sequence set is not less than 8. Or, the value of the last chip of each spreading sequence in the spreading sequences is a fixed value, and optionally, the hamming distance between any two spreading sequences in the spreading sequence set is not less than 8.
For example, m=16, l=16, and each spreading sequence included in the set of spreading sequences may be a variation of the spreading sequences shown in table 2 or table 3. For example, the first chip and the last chip of each spreading sequence shown in table 2 or table 3 are exchanged to obtain 16 new spreading sequences, and thus the spreading sequence set may include the 16 new spreading sequences. Alternatively, 16 new spreading sequences are obtained after exchanging any plurality of chips other than the first chip in each spreading sequence shown in table 2 or table 3, for example, the 2 nd chip and the 4 th chip in each spreading sequence shown in table 2 or table 3, and the 7 th chip and the 8 th chip in each spreading sequence shown in table 2 or table 3, and thus the spreading sequence set may include the 16 new spreading sequences. Alternatively, the q-th chip value in each spreading sequence shown in table 2 or table 3 is reversed to obtain 16 new spreading sequences, and the spreading sequence set further includes the 16 new chip sequences, q=1, 2,3, …,16. The inverting the value of the chip means that the value of the chip is changed from 1 to 0, or the value of the chip is changed from 0 to 1.
It should be noted that the operation of deforming the spread spectrum sequence shown in table 2 or table 3 may include a plurality of the operations described above. For example, the first chip and the last chip of each spreading sequence shown in table 2 or table 3 are exchanged to obtain 16 intermediate spreading sequences, the value of the q-th chip of each intermediate spreading sequence in the 16 intermediate spreading sequences is reversed to obtain 16 new spreading sequences, and the set of spreading sequences may further include the 16 new spreading sequences.
In a possible implementation manner, the sending end device obtains a first signal according to the spreading sequence set and the N data symbols, including: the transmitting terminal equipment maps each data symbol in the N data symbols to a spreading sequence corresponding to the data symbol according to the corresponding relation between M spreading sequences included in the spreading sequence set and M data symbols with different values to obtain a second signal; the transmitting end equipment modulates the second signal to obtain a first signal.
In a possible implementation manner, the sending end device obtains a first signal according to the spreading sequence set and the N data symbols, including: the transmitting terminal device performs spread spectrum processing on the N data symbols according to the spread spectrum sequence set to obtain a second signal; the transmitting end equipment modulates the second signal to obtain a first signal; the second signal comprises a first sub-signal and a second sub-signal, the first sub-signal is obtained by performing spread spectrum processing on the (2n+1) th data symbol in N data symbols according to a first spread spectrum sequence in a spread spectrum sequence set, the first spread spectrum sequence corresponds to the (2n+1) th data symbol, N is an integer, and N is more than or equal to 0 and less than or equal to (N-1)/2; the second sub-signal is obtained by performing spread spectrum processing on the 2N data symbol in the N data symbols according to a second spread spectrum sequence by the transmitting end device, wherein the second spread spectrum sequence is obtained by performing first processing on a third spread spectrum sequence corresponding to the 2N data symbol in the spread spectrum sequence set, and the value of the |l- (L+1) | chip included in the second spread spectrum sequence is the same as the value of the first chip included in the third spread spectrum sequence.
The transmitting device performs spreading processing on the (2n+1) th data symbol according to the first spreading sequence to obtain a first sub-signal, which means that the transmitting device maps the (2n+1) th data symbol to the first spreading sequence.
The sending end device performing spread spectrum processing on the 2nth data symbol according to the second spread spectrum sequence to obtain a second sub-signal means that the sending end device maps the 2nth data symbol to the second spread spectrum sequence.
The first process includes cyclic shifting and/or inverting. The inversion can be understood as a head-to-tail inversion or reverse, e.g., the result of inverting the spreading sequence 1 1 1 1 01 1 0 01 01 0 0 0 0 is 0 0 0 01 01 0 01 1 01 1 1 1. The embodiment of the present application is not limited to the specific form of the first processing, and the value of the |l- (l+1) | chip of the second spreading sequence obtained by performing the first processing on the third spreading sequence may be the same as the value of the first chip of the third spreading sequence. For example, the first process may include exchanging the first chip with the last chip of the spreading sequence.
In a possible implementation manner, the sending end device obtains a first signal according to the spreading sequence set and the N data symbols, including: the transmitting terminal device performs spread spectrum processing on the N data symbols according to the spread spectrum sequence set to obtain a second signal; the transmitting end equipment modulates the second signal to obtain a first signal; the second signal comprises a first sub-signal and a second sub-signal, the first sub-signal is obtained by performing spread spectrum processing on a (2n+1) th data symbol in the N data symbols according to a fourth spread spectrum sequence by a transmitting end device, the fourth spread spectrum sequence is obtained by performing first processing on a first spread spectrum sequence corresponding to the (2n+1) th data symbol in a spread spectrum sequence set, and the value of an |l- (L+1) | chip included in the fourth spread spectrum sequence is the same as the value of a first chip included in the first spread spectrum sequence; the second sub-signal is obtained by performing spread spectrum processing on the 2N data symbol in the N data symbols according to a third spread spectrum sequence in the spread spectrum sequence set by the transmitting end device, and the third spread spectrum sequence corresponds to the 2N data symbol.
The transmitting device modulates the second signal to obtain a first signal, which includes: the transmitting end device performs O-QPSK modulation on the second signal to obtain a first signal, or the transmitting end device may use other modulation modes different from O-QPSK modulation to modulate the second signal to obtain a first signal.
S620, the transmitting terminal equipment transmits the first signal.
Correspondingly, the receiving end device receives the first signal.
Illustratively, the transmitting device transmits a first signal comprising: the transmitting-end device transmits the first signal through a narrowband. For example, if the N data symbols are determined according to N' data bits included in the PPDU of the narrowband signal, the transmitting device may transmit the first signal through the narrowband.
Correspondingly, the receiving end device receives the first signal through the narrowband.
S630, the receiving end device carries out frequency offset estimation according to the first signal.
After receiving the first signal, the receiving end device may perform frequency offset estimation according to the first signal.
As described above, since the value of the first chip of each spreading sequence in the set of spreading sequences is a fixed value, or the value of the last chip of each spreading sequence in the set of spreading sequences is a fixed value, the first signal obtained by the transmitting device based on the set of spreading sequences and the N data symbols includes periodic fixed signal segments. Correspondingly, after the receiving end device receives the first signal, the frequency offset estimation can be performed according to the periodic fixed signal segments included in the first signal.
Assuming that the value of the first chip of each spreading sequence in the spreading sequence set is a fixed value, and the transmitting end device performs spreading processing on the (2n+1) th data symbol according to the first spreading sequence in the spreading sequence set, and performs spreading processing on the 2 n-th data symbol according to the second spreading sequence. In the schematic diagram of the chip offset in the O-QPSK modulation shown in fig. 7, the last chip (i.e., c 15,0 ) The value of (2 n + 1) is a fixed value, the first chip (i.e., c) corresponding to the (2n + 1) th data symbol 0,1 ) The value of (2 n + 2) th data symbol is a fixed value (i.e., c) 15,2 ) The value of (2 n+3) th data symbol is a fixed value (i.e., c) 0,3 ) The value of (2) is a fixed value. Due to chip c 15,0 And chip c 0,1 Partially overlap, thus chip c 15,0 And chip c 0,1 The modulated signal corresponding to the overlapping portion is a fixed signal segment. Similarly, chip c 15,2 And chip c 0,3 The modulated signal corresponding to the overlapping portion is a fixed signal segment. Furthermore, the receiving device can determine the phase difference between the two fixed signal segments and the duration of the interval between the two fixed signal segments (i.e. 32T c ) The carrier frequency offset is determined, i.e. the carrier frequency offset is equal to the ratio of the phase difference of the two stationary signal segments to the duration of the interval between the two stationary signal segments.
In an exemplary scenario of application of narrowband assisted UWB, a receiving end device receives a first signal through a narrowband, and after performing frequency offset estimation according to the first signal, the receiving end device may perform channel compensation according to the estimated carrier frequency offset, thereby assisting the receiving end device to receive the UWB signal. Further, after the receiving end device receives the UWB signal, the phase compensation may be performed on the UWB signal according to the estimated carrier frequency offset.
In this embodiment of the present application, since the value of the first chip of each spreading sequence in the spreading sequence set is a fixed value, or the value of the last chip of each spreading sequence in the spreading sequence set is a fixed value, the transmitting end device performs spreading processing on N data symbols according to the spreading sequence set to obtain a second signal, and then modulates the second signal to obtain a first signal including periodic fixed signal segments, so that the receiving end device may perform frequency offset estimation according to the periodic fixed signal segments included in the first signal.
In addition, the minimum hamming distance of the spread spectrum sequence set provided by the embodiment of the application is not less than 8, so that the difference of the spread spectrum sequences obtained by mapping different data symbols is larger, the probability of misjudgment of the data symbols by receiving end equipment can be reduced, and the transmission performance of the system is improved.
In addition, compared with a mode of periodically inserting a section of known fixed chip sequence to realize frequency offset estimation, the method provided by the embodiment of the application does not increase extra overhead, so that the transmission time of an air interface is not increased.
Fig. 8 is a schematic block diagram of an apparatus provided in an embodiment of the present application. As shown in fig. 8, the apparatus 1000 may include a transceiver unit 1010 and a processing unit 1020. The transceiver unit 1010 may communicate with the outside, and the processing unit 1020 is used for data processing. The transceiver unit 1010 may also be referred to as a communication interface or a communication unit.
Optionally, the apparatus 1000 may further include a storage unit, where the storage unit may be used to store instructions and/or data, and the processing unit 1020 may read the instructions and/or data in the storage unit, so that the apparatus implements the foregoing method embodiments.
In the first design, the apparatus 1000 may be a transmitting device in the foregoing embodiment, or may be a component (such as a chip) of the transmitting device. The apparatus 1000 may implement steps or processes performed by a sender device in the above method embodiment, where the transceiver unit 1010 may be configured to perform transceiver-related operations of the sender device in the above method embodiment, and the processing unit 1020 may be configured to perform processing-related operations of the sender device in the above method embodiment.
In a possible implementation manner, the processing unit 1020 is configured to obtain a first signal according to a spreading sequence set and N data symbols, where the spreading sequence set includes M spreading sequences with a length L, the M spreading sequences with a length L are in one-to-one correspondence with M data symbols with different values, values of a first chip included in any two spreading sequences with a length L in the M spreading sequences are the same, N, M and L are positive integers, l=1, or l=l; and a transceiver 1010 for transmitting the first signal.
In the second design, the apparatus 1000 may be a receiving end device in the foregoing embodiment, or may be a component (such as a chip) of the receiving end device. The apparatus 1000 may implement steps or processes performed by a receiving end device in the above method embodiment, where the transceiving unit 1010 may be configured to perform transceiving related operations of the receiving end device in the above method embodiment, and the processing unit 1020 may be configured to perform processing related operations of the receiving end device in the above method embodiment.
In a possible implementation manner, the transceiver 1010 is configured to receive a first signal, where the first signal is obtained according to a spreading sequence set and N data symbols, where the spreading sequence set includes M spreading sequences with a length L, where the M spreading sequences with a length L are in one-to-one correspondence with M data symbols with different values, where values of a first chip included in any two spreading sequences with a length L in the M spreading sequences are the same, N, M and L are positive integers, l=1, or l=l; a processing unit 1020, configured to perform frequency offset estimation according to the first signal.
It should be understood that the specific process of each unit performing the corresponding steps has been described in detail in the above method embodiments, and is not described herein for brevity.
It should also be appreciated that the apparatus 1000 herein is embodied in the form of functional units. The term "unit" herein may refer to an application specific integrated circuit (application specific integrated circuit, ASIC), an electronic circuit, a processor (e.g., a shared, dedicated, or group processor, etc.) and memory that execute one or more software or firmware programs, a combinational logic circuit, and/or other suitable components that support the described functionality. In an alternative example, it will be understood by those skilled in the art that the apparatus 1000 may be specifically configured as a transmitting end device in the foregoing embodiments, and may be configured to perform each flow and/or step corresponding to the transmitting end device in the foregoing method embodiments; alternatively, the apparatus 1000 may be specifically configured as the receiving end device in the foregoing embodiment, and may be configured to execute each flow and/or step corresponding to the receiving end device in the foregoing method embodiments, which is not described herein for avoiding repetition. The transceiver 1010 may also be a transceiver circuit (e.g., may include a receiving circuit and a transmitting circuit), and the processing unit 1020 may be a processing circuit. The apparatus in fig. 8 may be the device in the foregoing embodiment, or may be a chip or a chip system, for example: system of chip (SoC). The receiving and transmitting unit can be an input and output circuit and a communication interface; the processing unit is an integrated processor or microprocessor or integrated circuit on the chip. And are not limited herein.
The apparatus 1000 of each of the above embodiments has a function of implementing the corresponding steps performed by the transmitting-end device or the receiving-end device in the above method. The functions may be implemented by hardware, or may be implemented by hardware to execute corresponding software. The hardware or software comprises one or more modules corresponding to the functions; for example, the transceiver unit may be replaced by a transceiver (e.g., a transmitting unit in the transceiver unit may be replaced by a transmitter, a receiving unit in the transceiver unit may be replaced by a receiver), and other units, such as a processing unit, etc., may be replaced by a processor, to perform the transceiver operations and related processing operations in the various method embodiments, respectively.
Fig. 9 is a schematic diagram of an apparatus 2000 provided in an embodiment of the present application. The apparatus 2000 comprises a processor 2010 for executing computer programs or instructions stored in a memory 2020 or for reading data/instructions stored in the memory 2020 to perform the methods of the method embodiments above, optionally the processor 2010 is one or more.
Optionally, as shown in fig. 9, the apparatus 2000 further comprises a memory 2020, the memory 2020 being used for storing computer programs or instructions and/or data. The memory 2020 may be integral to the processor 2010 or may be separately provided. Optionally, the memory 2020 is one or more.
Optionally, as shown in fig. 9, the apparatus 2000 further comprises a transceiver 2030, the transceiver 2030 being used for receiving and/or transmitting signals. For example, processor 2010 is used to control transceiver 2030 for receiving and/or transmitting signals.
As an aspect, the apparatus 2000 is configured to implement the operations performed by the sender device in the above method embodiment.
For example, the processor 2010 is configured to execute computer programs or instructions stored in the memory 2020 to implement the operations associated with the transmitting device in the above method embodiments. For example, the method performed by the sender device in the embodiment shown in fig. 6.
Alternatively, the apparatus 2000 is configured to implement the method performed by the receiving device in the above method embodiment.
For example, the processor 2010 is configured to execute computer programs or instructions stored in the memory 2020 to implement the operations associated with the receiver device in the above method embodiments. For example, the method performed by the receiving end device in the embodiment shown in fig. 6.
It should be appreciated that the processors referred to in the embodiments of the present application may be central processing units (central processing unit, CPU), but may also be other general purpose processors, digital signal processors (digital signal processor, DSP), application specific integrated circuits (application specific integrated circuit, ASIC), off-the-shelf programmable gate arrays (field programmable gate array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
It should also be understood that the memories mentioned in the embodiments of the present application may be volatile memories and/or nonvolatile memories. The nonvolatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically Erasable EPROM (EEPROM), or a flash memory. The volatile memory may be random access memory (random access memory, RAM). For example, RAM may be used as an external cache. By way of example, and not limitation, RAM includes the following forms: static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous DRAM (SLDRAM), and direct memory bus RAM (DR RAM).
It should be noted that when the processor is a general purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, the memory (storage module) may be integrated into the processor.
It should also be noted that the memory described herein is intended to comprise, without being limited to, these and any other suitable types of memory.
Fig. 10 is a schematic diagram of a chip system 3000 according to an embodiment of the present application. The system-on-chip 3000 (or may also be referred to as a processing system) includes logic 3010 and input/output interface 3020.
Logic 3010 may be a processing circuit in system-on-chip 3000. Logic 3010 may be coupled to a memory unit to invoke instructions in the memory unit so that system-on-chip 3000 may implement the methods and functions of embodiments of the present application. The input/output interface 3020 may be an input/output circuit in the chip system 3000, outputting information processed by the chip system 3000, or inputting data or signaling to be processed into the chip system 3000 for processing.
Specifically, for example, if the transmitting-end device is equipped with the chip system 3000, the logic circuit 3010 is coupled to the input/output interface 3020, and the logic circuit 3010 may transmit a first signal through the input/output interface 3020, and the first signal may be generated by the logic circuit 3010. For another example, if the receiving device is equipped with the chip system 3000, the logic circuit 3010 is coupled to the input/output interface 3020, the logic circuit 3010 may receive the first signal through the input/output interface 3020, and the logic circuit 3020 performs frequency offset estimation according to the first signal.
As an aspect, the chip system 3000 is configured to implement the operations performed by the transmitting device in the above method embodiment.
For example, the logic circuit 3010 is configured to implement the operations related to processing performed by the transmitting-end apparatus in the above method embodiment, such as the operations related to processing performed by the transmitting-end apparatus in the embodiment shown in fig. 6; the input/output interface 3020 is used to implement the transmission and/or reception related operations performed by the transmitting end device in the above method embodiment, for example, the processing related operations performed by the transmitting end device in the embodiment shown in fig. 6.
Alternatively, the chip system 3000 is configured to implement the operations performed by the receiving device in the above method embodiments.
For example, the logic circuit 3010 is configured to implement the operations related to processing performed by the receiving end device in the above method embodiment, such as the operations related to processing performed by the receiving end device in the embodiment shown in fig. 6; the input/output interface 3020 is used to implement the transmission and/or reception related operations performed by the receiving end device in the above method embodiment, for example, the processing related operations performed by the receiving end device in the embodiment shown in fig. 6.
The present application also provides a computer readable storage medium having stored thereon computer instructions for implementing the method performed by the apparatus in the above method embodiments.
For example, the computer program when executed by a computer, enables the computer to implement the method performed by the transmitting device in the above-described method embodiment.
As another example, the computer program when executed by a computer may enable the computer to implement the method performed by the receiving device in the above-described method embodiment.
Embodiments of the present application also provide a computer program product containing instructions that, when executed by a computer, implement a method performed by a device (e.g., a transmitting device, and a receiving device) in the above method embodiments.
The embodiment of the application also provides a communication system, which comprises the sending end equipment and the receiving end equipment.
The explanation and beneficial effects of the related content in any of the above-mentioned devices can refer to the corresponding method embodiments provided above, and are not repeated here.
In the several embodiments provided in this application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Furthermore, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interface, device or unit indirect coupling or communication connection, which may be in electrical, mechanical or other form.
In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, produces a flow or function in accordance with embodiments of the present application, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. For example, the computer may be a personal computer, a server, or a network device, etc. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another, for example, by wired (e.g., coaxial cable, optical fiber, digital Subscriber Line (DSL)), or wireless (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains an integration of one or more available media. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a Solid State Disk (SSD), etc.). For example, the aforementioned usable media include, but are not limited to: a U-disk, a removable hard disk, a read-only memory (rom), a random access memory (random access memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. The scope of the present application is therefore intended to be covered by the following claims.
Claims (26)
1. A signal processing method, comprising:
receiving a first signal, wherein the first signal is obtained according to a spread spectrum sequence set and N data symbols, the spread spectrum sequence set comprises M spread spectrum sequences with the length of L, the M spread spectrum sequences with the length of L are in one-to-one correspondence with M data symbols with different values, the values of the first code chip included in any two spread spectrum sequences with the length of L in the M spread spectrum sequences are the same, N, M and L are positive integers, and l=1, or l=L;
and carrying out frequency offset estimation according to the first signal.
2. The method of claim 1 wherein said first signal is modulated with a second signal, said second signal being obtained by spreading said N data symbols according to said set of spreading sequences, said second signal comprising a first sub-signal and a second sub-signal,
The first sub-signal is obtained by performing spread spectrum processing on 2n+1th data symbol in the N data symbols according to a first spread spectrum sequence in the spread spectrum sequence set, wherein the first spread spectrum sequence corresponds to the 2n+1th data symbol, N is an integer, and N is more than or equal to 0 and less than or equal to (N-1)/2;
the second sub-signal is obtained by performing spreading processing on the 2N-th data symbol in the N symbols according to a second spreading sequence, the second spreading sequence is obtained by performing first processing on a third spreading sequence corresponding to the 2N-th data symbol in the spreading sequence set, and the value of the |l- (l+1) | chip included in the second spreading sequence is the same as the value of the first chip included in the third spreading sequence.
3. The method according to claim 2, wherein the first processing comprises cyclic shifting and/or inverting.
4. A method according to any one of claims 1 to 3, characterized in that the hamming distance between any two different spreading sequences in the set of spreading sequences is not less than 8.
5. The method of claim 4, wherein l=16, m=16, and wherein each of the remaining columns except for the first column comprises 8 1 and 8 0 in a matrix of the M spreading sequences of length L, each row of the matrix corresponding to one spreading sequence of the set of spreading sequences.
6. The method of claim 5, wherein l = 1, the set of spreading sequences comprises the following spreading sequences:
{1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1}，{1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0}，{1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0}，{1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1}，{1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0}，{1 0 1 0 0 1 0 1 1 0 1 0 0 1 0 1}，{1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1}，{1 0 0 1 0 1 1 0 1 0 0 1 0 1 1 0}，{1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0}，{1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1}，{1 1 0 0 1 1 0 0 0 0 1 1 0 0 1 1}，{1 0 0 1 1 0 0 1 0 1 1 0 0 1 1 0}，{1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1}，{1 0 1 0 0 1 0 1 0 1 0 1 1 0 1 0}，{1 1 0 0 0 0 1 1 0 0 1 1 1 1 0 0}，{1 0 0 1 0 1 1 0 0 1 1 0 1 0 0 1}。
7. the method of claim 5, wherein L = L, the set of spreading sequences comprises the following spreading sequences:
{1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1}，{0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1}，{0 1 0 0 1 1 0 0 1 1 0 0 1 1 0 1}，{1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1}，{0 1 1 1 0 0 0 0 1 1 1 1 0 0 0 1}，{1 0 1 0 0 1 0 1 1 0 1 0 0 1 0 1}，{1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1}，{0 0 0 1 0 1 1 0 1 0 0 1 0 1 1 1}，{0 1 1 1 1 1 1 1 0 0 0 0 0 0 0 1}，{1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1}，{1 1 0 0 1 1 0 0 0 0 1 1 0 0 1 1}，{0 0 0 1 1 0 0 1 0 1 1 0 0 1 1 1}，{1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1}，{0 0 1 0 0 1 0 1 0 1 0 1 1 0 1 1}，{0 1 0 0 0 0 1 1 0 0 1 1 1 1 0 1}，{1 0 0 1 0 1 1 0 0 1 1 0 1 0 0 1}。
8. the method of claim 5, wherein l = 1, the set of spreading sequences comprises the following spreading sequences:
{1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1}，{1 1 1 1 0 1 1 0 0 1 0 1 0 0 0 0}，{1 0 1 1 1 0 1 1 0 0 1 0 1 0 0 0}，{1 0 0 1 1 1 0 1 1 0 0 1 0 1 0 0}，{1 0 0 0 1 1 1 0 1 1 0 0 1 0 1 0}，{1 0 0 0 0 1 1 1 0 1 1 0 0 1 0 1}，{1 1 0 0 0 0 1 1 1 0 1 1 0 0 1 0}，{1 0 1 0 0 0 0 1 1 1 0 1 1 0 0 1}，{1 1 0 1 0 0 0 0 1 1 1 0 1 1 0 0}，{1 0 1 0 1 0 0 0 0 1 1 1 0 1 1 0}，{1 0 0 1 0 1 0 0 0 0 1 1 1 0 1 1}，{1 1 0 0 1 0 1 0 0 0 0 1 1 1 0 1}，{1 1 1 0 0 1 0 1 0 0 0 0 1 1 1 0}，{1 0 1 1 0 0 1 0 1 0 0 0 0 1 1 1}，{1 1 0 1 1 0 0 1 0 1 0 0 0 0 1 1}，{1 1 1 0 1 1 0 0 1 0 1 0 0 0 0 1}。
9. the method of claim 5, wherein L = L, the set of spreading sequences comprises the following spreading sequences:
{1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1}，{0 1 1 1 0 1 1 0 0 1 0 1 0 0 0 1}，{0 0 1 1 1 0 1 1 0 0 1 0 1 0 0 1}，{0 0 0 1 1 1 0 1 1 0 0 1 0 1 0 1}，{0 0 0 0 1 1 1 0 1 1 0 0 1 0 1 1}，{1 0 0 0 0 1 1 1 0 1 1 0 0 1 0 1}，{0 1 0 0 0 0 1 1 1 0 1 1 0 0 1 1}，{1 0 1 0 0 0 0 1 1 1 0 1 1 0 0 1}，{0 1 0 1 0 0 0 0 1 1 1 0 1 1 0 1}，{0 0 1 0 1 0 0 0 0 1 1 1 0 1 1 1}，{1 0 0 1 0 1 0 0 0 0 1 1 1 0 1 1}，{1 1 0 0 1 0 1 0 0 0 0 1 1 1 0 1}，{0 1 1 0 0 1 0 1 0 0 0 0 1 1 1 1}，{1 0 1 1 0 0 1 0 1 0 0 0 0 1 1 1}，{1 1 0 1 1 0 0 1 0 1 0 0 0 0 1 1}，{1 1 1 0 1 1 0 0 1 0 1 0 0 0 0 1}。
10. the method according to any of claims 2 to 9, wherein the first signal is an offset quadrature phase shift keying modulation of the second signal.
11. The method according to any of claims 1 to 10, wherein the N data symbols are derived from data bits comprised by a physical layer protocol data unit, the receiving the first signal comprising:
the first signal is received over a narrowband.
12. A signal processing method, comprising:
obtaining a first signal according to a spread spectrum sequence set and N data symbols, wherein the spread spectrum sequence set comprises M spread spectrum sequences with the length of L, the M spread spectrum sequences with the length of L are in one-to-one correspondence with the M data symbols with different values, the values of the first chips included in any two spread spectrum sequences with the length of L in the M spread spectrum sequences are the same, N, M and L are positive integers, and l=1 or l=L;
And transmitting the first signal.
13. The method of claim 12, wherein the deriving the first signal from the set of spreading sequences and the N data symbols comprises:
performing spread spectrum processing on the N data symbols according to the spread spectrum sequence set to obtain a second signal;
modulating the second signal to obtain the first signal;
wherein the second signal comprises a first sub-signal and a second sub-signal,
the first sub-signal is obtained by performing spread spectrum processing on 2n+1th data symbol in the N data symbols according to a first spread spectrum sequence in the spread spectrum sequence set, wherein the first spread spectrum sequence corresponds to the 2n+1th data symbol, N is an integer, and N is more than or equal to 0 and less than or equal to (N-1)/2;
the second sub-signal is obtained by performing spreading processing on the 2N-th data symbol in the N symbols according to a second spreading sequence, the second spreading sequence is obtained by performing first processing on a third spreading sequence corresponding to the 2N-th data symbol in the spreading sequence set, and the value of the |l- (l+1) | chip included in the second spreading sequence is the same as the value of the first chip included in the third spreading sequence.
14. The method according to claim 13, wherein the first processing comprises cyclic shifting and/or inverting.
15. The method according to any of claims 12 to 14, wherein the hamming distance between any two different spreading sequences in the set of spreading sequences is not less than 8.
16. The method of claim 15, wherein l=16, m=16, and wherein each of the remaining columns except for the first column comprises 8 1 and 8 0 in a matrix of the M spreading sequences of length L, each row of the matrix corresponding to one spreading sequence of the set of spreading sequences.
17. The method of claim 16, wherein l = 1, the set of spreading sequences comprises the following spreading sequences:
{1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1}，{1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0}，{1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0}，{1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1}，{1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0}，{1 0 1 0 0 1 0 1 1 0 1 0 0 1 0 1}，{1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1}，{1 0 0 1 0 1 1 0 1 0 0 1 0 1 1 0}，{1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0}，{1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1}，{1 1 0 0 1 1 0 0 0 0 1 1 0 0 1 1}，{1 0 0 1 1 0 0 1 0 1 1 0 0 1 1 0}，{1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1}，{1 0 1 0 0 1 0 1 0 1 0 1 1 0 1 0}，{1 1 0 0 0 0 1 1 0 0 1 1 1 1 0 0}，{1 0 0 1 0 1 1 0 0 1 1 0 1 0 0 1}。
18. the method of claim 16, wherein L = L, the set of spreading sequences comprises the following spreading sequences:
{1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1}，{0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1}，{0 1 0 0 1 1 0 0 1 1 0 0 1 1 0 1}，{1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1}，{0 1 1 1 0 0 0 0 1 1 1 1 0 0 0 1}，{1 0 1 0 0 1 0 1 1 0 1 0 0 1 0 1}，{1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1}，{0 0 0 1 0 1 1 0 1 0 0 1 0 1 1 1}，{0 1 1 1 1 1 1 1 0 0 0 0 0 0 0 1}，{1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1}，{1 1 0 0 1 1 0 0 0 0 1 1 0 0 1 1}，{0 0 0 1 1 0 0 1 0 1 1 0 0 1 1 1}，{1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1}，{0 0 1 0 0 1 0 1 0 1 0 1 1 0 1 1}，{0 1 0 0 0 0 1 1 0 0 1 1 1 1 0 1}，{1 0 0 1 0 1 1 0 0 1 1 0 1 0 0 1}。
19. the method of claim 16, wherein l = 1, the set of spreading sequences comprises the following spreading sequences:
{1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1}，{1 1 1 1 0 1 1 0 0 1 0 1 0 0 0 0}，{1 0 1 1 1 0 1 1 0 0 1 0 1 0 0 0}，{1 0 0 1 1 1 0 1 1 0 0 1 0 1 0 0}，{1 0 0 0 1 1 1 0 1 1 0 0 1 0 1 0}，{1 0 0 0 0 1 1 1 0 1 1 0 0 1 0 1}，{1 1 0 0 0 0 1 1 1 0 1 1 0 0 1 0}，{1 0 1 0 0 0 0 1 1 1 0 1 1 0 0 1}，{1 1 0 1 0 0 0 0 1 1 1 0 1 1 0 0}，{1 0 1 0 1 0 0 0 0 1 1 1 0 1 1 0}，{1 0 0 1 0 1 0 0 0 0 1 1 1 0 1 1}，{1 1 0 0 1 0 1 0 0 0 0 1 1 1 0 1}，{1 1 1 0 0 1 0 1 0 0 0 0 1 1 1 0}，{1 0 1 1 0 0 1 0 1 0 0 0 0 1 1 1}，{1 1 0 1 1 0 0 1 0 1 0 0 0 0 1 1}，{1 1 1 0 1 1 0 0 1 0 1 0 0 0 0 1}。
20. the method of claim 16, wherein L = L, the set of spreading sequences comprises the following spreading sequences:
{1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1}，{0 1 1 1 0 1 1 0 0 1 0 1 0 0 0 1}，{0 0 1 1 1 0 1 1 0 0 1 0 1 0 0 1}，{0 0 0 1 1 1 0 1 1 0 0 1 0 1 0 1}，{0 0 0 0 1 1 1 0 1 1 0 0 1 0 1 1}，{1 0 0 0 0 1 1 1 0 1 1 0 0 1 0 1}，{0 1 0 0 0 0 1 1 1 0 1 1 0 0 1 1}，{1 0 1 0 0 0 0 1 1 1 0 1 1 0 0 1}，{0 1 0 1 0 0 0 0 1 1 1 0 1 1 0 1}，{0 0 1 0 1 0 0 0 0 1 1 1 0 1 1 1}，{1 0 0 1 0 1 0 0 0 0 1 1 1 0 1 1}，{1 1 0 0 1 0 1 0 0 0 0 1 1 1 0 1}，{0 1 1 0 0 1 0 1 0 0 0 0 1 1 1 1}，{1 0 1 1 0 0 1 0 1 0 0 0 0 1 1 1}，{1 1 0 1 1 0 0 1 0 1 0 0 0 0 1 1}，{1 1 1 0 1 1 0 0 1 0 1 0 0 0 0 1}。
21. The method according to any of claims 13 to 20, wherein modulating the second signal to obtain the first signal comprises:
and performing offset quadrature phase shift keying modulation on the second signal to obtain the first signal.
22. The method according to any of claims 12 to 21, wherein the N data symbols are derived from data bits comprised by a physical layer protocol data unit, the transmitting the first signal comprising:
the first signal is transmitted over a narrowband.
23. An apparatus is characterized by comprising a receiving and transmitting unit and a processing unit,
the receiving and transmitting unit is configured to receive a first signal, where the first signal is obtained according to a spreading sequence set and N data symbols, the spreading sequence set includes M spreading sequences with a length L, the M spreading sequences with a length L are in one-to-one correspondence with M data symbols with different values, values of a first chip included in any two of the M spreading sequences with a length L are the same, N, M and L are positive integers, l=1, or l=l;
the processing unit is used for carrying out frequency offset estimation according to the first signal.
24. An apparatus is characterized by comprising a receiving and transmitting unit and a processing unit,
the processing unit is configured to obtain a first signal according to a spreading sequence set and N data symbols, where the spreading sequence set includes M spreading sequences with a length L, the M spreading sequences with a length L correspond to the M data symbols with different values one by one, values of first chips included in any two spreading sequences in the M spreading sequences with a length L are the same, N, M and L are positive integers, l=1, or l=l;
the receiving and transmitting unit is used for transmitting the first signal.
25. An apparatus, comprising:
a processor for executing computer instructions stored in a memory to cause the apparatus to perform the method of any one of claims 1 to 11 or to cause the apparatus to perform the method of any one of claims 12 to 22.
26. A computer readable storage medium storing a computer program comprising instructions for implementing the method of any one of claims 1 to 11 or instructions for implementing the method of any one of claims 12 to 22.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2023/082729 WO2024036949A1 (en) | 2022-08-19 | 2023-03-21 | Signal processing method and apparatus |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211000990 | 2022-08-19 | ||
| CN202211000990X | 2022-08-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117640313A true CN117640313A (en) | 2024-03-01 |
Family
ID=90036094
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211021969.8A Pending CN117640313A (en) | 2022-08-19 | 2022-08-24 | Signal processing method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117640313A (en) |
-
2022
- 2022-08-24 CN CN202211021969.8A patent/CN117640313A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108024325A (en) | Wireless communications method and device | |
| US20140233475A1 (en) | Scrambling sequence generation method and apparatus for use in device-to-device communication | |
| US20230345230A1 (en) | Communication method and apparatus | |
| US20230370189A1 (en) | Enhanced Long Range Communication Schemes In Wireless Communications | |
| WO2021109108A1 (en) | Communication method and apparatus | |
| CN117640313A (en) | Signal processing method and device | |
| WO2024036949A1 (en) | Signal processing method and apparatus | |
| WO2022141276A1 (en) | Information determination method and apparatus, information transmission method and apparatus, device, and storage medium | |
| WO2024012259A1 (en) | Communication method and apparatus | |
| WO2024051245A1 (en) | Signal processing method and apparatus | |
| WO2023241651A1 (en) | Communication method and apparatus based on physical layer protocol data unit | |
| WO2023225962A1 (en) | Distance measurement method and related apparatus | |
| WO2023179430A1 (en) | Communication method, device and system | |
| WO2023165454A1 (en) | Communication method and apparatus | |
| WO2023241431A1 (en) | Method and apparatus for transmitting physical protocol data unit based on ultra-wideband | |
| WO2023207602A1 (en) | Communication method and related apparatus | |
| WO2023185637A1 (en) | Secure distance measurement method and communication apparatus | |
| WO2023227041A1 (en) | Communication method and apparatus | |
| WO2024051318A1 (en) | Communication method and apparatus | |
| WO2023083037A1 (en) | Signal transmission method and apparatus | |
| WO2023083134A1 (en) | Data transmission method and apparatus | |
| WO2023236823A1 (en) | Uwb-based ppdu transmission method and related apparatus | |
| WO2023050435A1 (en) | Communication method and apparatus for wireless fidelity (wi-fi) system | |
| WO2024037445A1 (en) | Method for indicating physical layer configuration, and related apparatus | |
| WO2024098301A1 (en) | Signal transmission method and apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication |