CN110557219A - Digital modulation method, demodulation method, device and communication system - Google Patents

Abstract

The application discloses a digital modulation method, a demodulation method, a device and a communication system. The sending equipment accumulates the constellation phase of the symbol and the phase of the amplitude which is larger than the amplitude threshold value in the previous symbol, and when the receiving equipment receives the symbol, the receiving equipment differentiates the phase of the symbol and the phase of the closest symbol which is larger than the amplitude threshold value in the previous symbol, so that a certain phase differential gain is obtained, the phase noise added in the transmission process of the symbol in a channel is effectively eliminated, and the anti-interference capability to the phase noise is improved. Meanwhile, the probability of continuously generating small-amplitude points is reduced by arranging a plurality of reference circular rings, so that the strong anti-phase noise capability is kept, and the anti-phase noise robustness is improved.

Description

Digital modulation method, demodulation method, device and communication system

Technical Field

The present invention relates to the field of communications, and in particular, to a digital modulation method, a digital demodulation device, and a communication system.

Background

In a nonlinear channel, the envelope fluctuation of the modulation mode used is required to be small, and in order to improve the utilization rate of the spectrum bandwidth, a high-order modulation mode combining amplitude and phase is generally adopted for signal transmission. When the frequency and the modulation order of the carrier wave are high, the modulation mode is greatly influenced by the phase noise.

For example, in IEEE802.11ad communication protocol, the Frequency band of the Carrier operates at 60GHz, and the IEEE802.11ad communication protocol defines SC PHY (Single Carrier PHY, Single Carrier physical layer, abbreviated SC PHY) and OFDM PHY (Orthogonal Frequency Division Multiplexing PHY, abbreviated OFDM PHY), where the OFDM PHY has a high requirement for a Power amplifier due to a large PAPR (Peak to Average Power Ratio, abbreviated PAPR), and is not industrialized; in order to reduce the requirement of the power amplifier, the SC PHY only supports a Modulation mode with a maximum of 16QAM (Quadrature Amplitude Modulation, QAM for short), if the Modulation order is increased, the phase noise may cause great interference, and the error rate after decoding may not meet the data transmission requirement.

The existing phase noise suppression algorithm is not strong in robustness, and when a signal works on a designated frequency point or frequency band, a good phase noise suppression effect can be achieved. The existing communication system uses a wider frequency band, the current working frequency band may not be at the designated frequency point or frequency point, and at this time, the anti-noise capability of the currently used phase suppression algorithm is rapidly deteriorated, and normal data transmission cannot be satisfied, so that a phase noise suppression algorithm with strong robustness is urgently needed.

Disclosure of Invention

the technical problem to be solved by the present application is to provide a digital modulation method, a demodulation method, a related device and a communication system, which effectively suppress the influence of phase deflection caused by white noise on the bit error rate.

In a first aspect, the present application provides a digital modulation method, including: the method comprises the steps that a sending device carries out coding processing on original data to obtain a bit sequence, the original data can be binary bit streams, the coding processing comprises source coding and channel coding, and the source coding compresses the original data to reduce redundant information in the data; channel coding is used to add redundant information to the data to increase the reliability of the data. Source coding includes, but is not limited to, huffman coding, shannon coding, or carnot coding, and channel coding includes, but is not limited to, Turbo coding, LDPC (Low Density Parity Check Code) coding, or interleaved coding. The original data is coded to obtain binary bit sequence, the bit sequence is divided into M bit groups, each bit group in the M bit groups comprises equal number of bits, and the ratio is assumedThe special group includes N bits, and M bit groups are constellation-mapped according to a constellation diagram to obtain M symbols, where the constellation diagram in the present application is similar to an Amplitude Phase Shift Keying (APSK) constellation diagram, the number of rings in the constellation diagram is P, and the radii of the P rings from inside to outside are: r is₁、r₂、…、r_P，r₁＜r₂＜…＜r_PThe circle is distributed with a plurality of constellation points at equal intervals, and the bit group mapped by two adjacent constellation points on the circle only has one bit with different value at the corresponding position. The transmitting device obtains the amplitude and phase of the M symbols, assuming that the M symbols are denoted S₁(A₁,φ₁)、S₂(A₂,φ₂)、…S_i(A_i,φ_i)、…S_M-1(A_M-1,φ_M-1)、S_M(A_M,φ_M) I represents the number of symbols, i is not less than 1 and not more than M and i is a positive integer, A_iDenotes the amplitude, phi, of the ith symbol_iindicating the phase of the ith symbol. The transmitting device converts the phases phi of the M symbols_iis adjusted to theta_iWherein the amplitude of the M symbols remains unchanged. The phase adjustment method comprises the following steps: when i is 1, theta₁＝φ₁(ii) a When i is more than or equal to 2 and less than or equal to M, theta_i＝φ_i+φ_sum(i-1,A_th)，A_thRepresents the amplitude threshold, phi_sum(i-1,A_th) Indicating that the amplitude from the 1 st constellation point to the i-1 constellation point is greater than an amplitude threshold A_thIt should be noted that when there is no constellation point with amplitude greater than the amplitude threshold value from the 1 st constellation point to the i-1 st constellation point, θ is equal to the sum of the phases of all the constellation points_i＝φ_i. The M symbols after phase adjustment are: s₁(A₁,θ₁)、S₂(A₂,θ₂)、…S_i(A_i,θ_i)、…S_M-1(A_M-1,θ_M-1)、S_M(A_M,θ_M) And the sending equipment modulates the M symbols after the phase adjustment to obtain a modulation signal. For example: performing single carrier modulation/DFT-S-OFDM (Disc) on M symbolsThe method comprises the steps of carrying out real Fourier transform-Spread-Orthogonal Frequency Division Multiplexing, resource mapping, layer mapping and antenna port mapping, loading a high-Frequency carrier, and then sending the carrier through an antenna port. It can be understood that the modulated signal transmitted by the transmitting device may introduce noise during the channel transmission, which causes some errors in the amplitude and phase of the symbol received by the receiving device and the amplitude and phase of the symbol actually transmitted by the transmitting device, for example: the symbols sent by the sending device are S (a, phi), and the corresponding symbols received by the receiving device are S (a + deltaa, phi + phi)_P+φ_N) Δ A is the amplitude noise, φ, caused by white noise_PFor additive phase noise, for white noise induced phase deflection, phi_PAnd phi_Nare referred to as phase noise.

In the present application, the radius is made larger than an amplitude threshold A_thThe circle of (2) is called a reference circle, and points (symbols) whose amplitude is larger than an amplitude threshold value are called large amplitude points, and points (symbols) whose amplitude is not larger than the amplitude threshold value are called small amplitude points. In case P > 2, i.e. the number of rings in the constellation is greater than 2, the amplitude threshold A_th＜r_P-1I.e. in this application at least two reference rings are provided. Because the tolerance of the small amplitude point to the phase noise is weak, and the tolerance of the large amplitude point to the phase noise is strong, the method and the device perform phase accumulation on the symbols with the amplitude larger than the amplitude threshold, so that the symbols with the amplitude larger than the amplitude threshold can obtain differential gain at a receiving end, and the anti-interference capability of a communication system to the phase is enhanced. In addition, the probability of continuously generating small-amplitude points is reduced by arranging a plurality of reference circular rings, so that strong anti-phase noise capability is kept, and the anti-phase noise robustness is improved.

In one possible design, the constellation point maps a bit set of 4 bits, the constellation diagram includes 2 rings, the number of constellation points on each ring from inside to outside is 6 and 10, and the radius of each ring is: r is₁＝0.4082r±10％，r₂＝1.2247r±10％，r₁＜A_th＜r₂And r is more than 0, and the reference ring is the 2 nd ring. Wherein X. + -. 10 in the present embodiment is represented byX is a float between-10% and + 10% on a basis, inclusive. For example: r is₁0.4082r ± 10% means: 0.4082r × 0.9 ≤ r₁≤0.4082r×1.1。

In one possible design, the number of bits of the bit group mapped by the constellation point is 6, the constellation diagram comprises 5 circles, the number of constellation points on each circle from inside to outside of the constellation diagram is 4, 10, 14, 18 and 18, and the radius of each circle from inside to outside of the constellation diagram is: r is₁＝0.177r±10％，r₂＝0.4146r±10％，r₃＝0.6516r±10％，r₄＝1.1255r±10％，r₅＝1.3624r±10％，r₃＜A_th＜r₄And r is more than 0, and the reference ring is a 3 rd ring and a 4 th ring.

In one possible design, the number of bits of the bit group mapped by the constellation point is 8, the constellation diagram includes 9 circles, the number of constellation points on each circle from inside to outside of the constellation diagram is 4, 8, 32, and the radius of each circle is: r is₁＝0.1128r±10％，r₂＝0.4136r±10％，r₃＝0.5640r±10％、r₄＝0.7144r±10％、r₅＝0.8649r±10％、r₆＝1.0153r±10％、r₇＝1.1657r±10％、r₈＝1.3161r±10％、r₉＝1.4665±10％，r₁＜A_th＜r₂R > 0, reference rings from 2 nd to 9 th.

In a possible design, a first symbol in the M symbols is a pilot symbol, the pilot symbol is generated by constellation mapping of known bits, and other symbols except the first symbol in the M symbols all carry service data, so that the service data can obtain differential gain at a receiving device end, and the capability of resisting phase deflection caused by white noise in the process of transmitting the service data is further enhanced.

it should be noted that, the transmitting device may modulate a plurality of symbol sets in a parallel manner, and the method for modulating symbols in a symbol set may refer to the method in each of the embodiments of the first aspect and the first aspect, so that the efficiency of modulating data by the transmitting device can be improved.

In one possible design, two adjacent constellation points on the ring are respectively mapped with a first bit group and a second bit group, and only one bit in the bit positions corresponding to the same position in the first bit group and the second bit group has a different value. For example: the bit groups mapped by two adjacent constellation points are 0001 and 0011, and only one bit with a different value exists on the 3 rd bit of the two bit groups. The corresponding position is not limited in this embodiment, and may be any position in the bit group, but the corresponding positions in the two bit groups must be the same.

In a second aspect, the present application provides a digital demodulation method, comprising: the receiving device receives M symbols from the transmitting device, for example: the receiving device receives the modulation signal from the transmitting device, demodulates the modulation signal to obtain M symbols, and acquires the amplitude and phase of M symbols, wherein the M symbols are assumed to be S'₁(B₁,α₁)、S′₂(B₂,α₂)、…、S′_i(B_i,α_i)、S'_M(B_M,α_M) I represents the number of symbols, i is greater than or equal to 1 and less than or equal to M, and i is a positive integer, B_iRepresenting the amplitude, alpha, of the ith symbol_iIndicating the phase of the ith symbol. The receiving device converts the phases alpha of the M symbols_iAdjusted to beta_iThe amplitude remains unchanged. The phase adjustment method comprises the following steps: in the case where i is 1, β₁＝α₁(ii) a In the case of 2. ltoreq. i.ltoreq.M, beta_i＝α_i-α_min(i-1,B_th)，B_thAs amplitude threshold, amplitude threshold B_thLess than the maximum amplitude value, alpha, corresponding to the constellation diagram_min(i-1,B_th) Indicating that the amplitude of the 1 st to i-1 st symbols is larger than the amplitude threshold value B_thAnd the phase of the symbol closest to the ith symbol, where the distance represents the difference in the index between two symbols, for example: the distance between the 1 st symbol and the 4 th symbol is 3. The M symbols after phase adjustment are S₁(B₁,β₁)、S₂(B₂,β₂)、…、S_i(B_i,β_i)、S_M(B_M,β_M) And according to the constellation diagram, performing constellation de-mapping on the M symbols after the phase adjustment to obtain M bit groups, wherein the order of the constellation diagram is equal to the order of the symbol, the constellation diagram used by the receiving equipment in the constellation de-mapping is the same as the constellation diagram used by the sending equipment in the mapping, and the receiving equipment performs decoding processing on the M bit groups to obtain the original data.

The constellation diagram in this application is similar to an Amplitude Phase Shift Keying (APSK) constellation diagram, where the number of rings in the constellation diagram is P, P is an integer greater than 2, and the radii of the P rings from inside to outside are: r is₁、r₂、…、r_P，r₁＜r₂＜…＜r_PAnd a plurality of constellation points are distributed on the circular ring at equal intervals. B is_th＜r_P-1. The present application is provided with at least two reference rings, see description of the first aspect for the definition of rings.

It should be noted that the receiving device may process a plurality of symbol sets in a parallel manner, and the processing method in the symbol set may refer to the description in the second aspect, and is not described herein again.

In one possible design, N-4, P-2, the number of constellation points on each ring from inside to outside is 6 and 10, r₁＝0.4082r±10％，r₂＝1.2247r±10％，r₁＜B_th＜r₂R is more than 0; or

N6, P5, the number of constellation points on each ring from inside to outside being 4, 10, 14, 18 and 18, r₁＝0.177r±10％，r₂＝0.4146r±10％，r₃＝0.6516r±10％，r₄＝1.1255r±10％，r₅＝1.3624r±10％，r₃＜B_th＜r₄R is more than 0; or

n is 8, P is 9, and the number of constellation points on each ring from inside to outside is: 4. 28, 32 and 32, r₁＝0.1128r±10％，r₂＝0.4136r±10％，r₃＝0.5640r±10％、r₄＝0.7144r±10％、r₅＝0.8649r±10％、r₆＝1.0153r±10％、r₇＝1.1657r±10％、r₈＝1.3161r±10％、r₉＝1.4665±10％，r₁＜B_th＜r₂，r＞0。

In one possible design, the first symbol of the M symbols is a pilot symbol, and the other symbols are data symbols carrying traffic data.

in one possible design, two adjacent constellation points on the ring are respectively mapped with a first bit group and a second bit group, and only one bit in the bit positions corresponding to the same position in the first bit group and the second bit group has a different value. For example: the bit groups mapped by two adjacent constellation points are 0001 and 0011, and only one bit with a different value exists on the 3 rd bit of the two bit groups. The corresponding position is not limited in this embodiment, and may be any position in the bit group, but the corresponding positions in the two bit groups must be the same.

In a third aspect, the present application provides a digital modulation method, first, a sending device performs coding processing on original data to obtain a bit sequence, where the original data may be a binary bit stream, the coding processing includes source coding and channel coding, the source coding is used to compress the original data to reduce redundant information in the original data, and the source coding includes but is not limited to shannon coding, huffman coding or feinuo coding; channel coding, including but not limited to Turbo codes, LDPC codes, or interleaved codes, is used to add redundant information to the original data to increase the reliability of the original data. The original data is subjected to the coding processing to obtain a binary bit sequence, the bit sequence is divided into M bit groups, the number of bit positions in the bit groups is equal to the modulation order, the M bit groups are subjected to constellation mapping according to a constellation diagram, the number of rings in the constellation diagram is P, and the radiuses of the P rings from inside to outside are as follows: r is₁、r₂、…、r_P，r₁＜r₂＜…＜r_PThe number of the constellation points on the circular ring is a power of 2, the constellation points on the circular ring are distributed at equal intervals, and the bit groups mapped by two adjacent constellation points on the circular ring only have one different value at the corresponding positionsA bit. The transmitting device obtains the amplitude and phase of the M symbols, assuming that the M symbols are denoted S₁(A₁,φ₁)、S₂(A₂,φ₂)、…S_i(A_i,φ_i)、…S_M-1(A_M-1,φ_M-1)、S_M(A_M,φ_M) I represents the number of symbols, i is not less than 1 and not more than M and i is a positive integer, A_idenotes the amplitude, phi, of the ith symbol_iIndicating the phase of the ith symbol. The transmitting device converts the phases phi of the M symbols_iis adjusted to theta_iWherein the amplitude of the M symbols remains unchanged. The phase adjustment method comprises the following steps: when i is 1, theta₁＝φ₁(ii) a When i is more than or equal to 2 and less than or equal to M, theta_i＝φ_i+φ_i-1+…+φ₁. The M symbols after phase adjustment are represented as: s₁(A₁,θ₁)、S₂(A₂,θ₂)、…S_i(A_i,θ_i)、…S_M-1(A_M-1,θ_M-1)、S_M(A_M,θ_M) And the sending equipment modulates the M symbols after the phase adjustment to obtain a modulation signal. For example, after performing single carrier modulation/DFT-S-OFDM, resource mapping, layer mapping and antenna port mapping on M symbols, the M symbols are loaded with high-frequency carriers and transmitted through an antenna port. It can be understood that the modulated signal transmitted by the transmitting device may introduce noise during the channel transmission, which causes some errors in the amplitude and phase of the symbol received by the receiving device and the amplitude and phase of the symbol actually transmitted by the transmitting device, for example: the symbols sent by the sending device are S (a, phi), and the corresponding symbols received by the receiving device are S (a + deltaa, phi + phi)_P+φ_N) Δ A is the amplitude noise, φ, caused by white noise_PIs additive phase noise, phi_NFor phase deflection due to white noise, phi_PAnd phi_NAre referred to as phase noise.

The constellation diagram in the present application is similar to an Amplitude Phase Shift Keying (APSK) constellation diagram, in which the number of the rings is P, P is an integer greater than 2, and P rings are half-rings from inside to outsideThe diameter is as follows: r is₁、r₂、…、r_P，r₁＜r₂＜…＜r_PA plurality of constellation points, B, are distributed on the ring at equal intervals_th＜r_P-1. The present application is provided with at least two reference rings, see description of the first aspect for the definition of rings.

In one possible design, N-4, P-2, the number of constellation points on each ring from inside to outside of the constellation is 6 and 10, r₁＝0.4082r±10％，r₂＝1.2247r±10％，r₁＜A_th＜r₂r is more than 0; or

N-6, P-5, the number of constellation points on each ring from inside to outside of the constellation diagram is 4, 10, 14, 18 and 18, r₁＝0.1777r±10％，r₂＝0.4146r±10％，r₃＝0.6516r±10％，r₄＝1.1255r±10％，r₅＝1.3624r±10％，r₃＜A_thR is less than r4, r is more than 0; or

N is 8, P is 9, the number of constellation points on each ring from inside to outside of the constellation diagram is: 4. 28, 32 and 32, r₁＝0.1128r±10％，r₂＝0.4136r±10％，r₃＝0.5640r±10％、r₄＝0.7144r±10％、r₅＝0.8649r±10％、r₆＝1.0153r±10％、r₇＝1.1657r±10％、r₈＝1.3161r±10％、r₉＝1.4665±10％，r₁＜A_th＜r₂，r＞0。

In a possible design, the first symbol in the M symbols is a pilot symbol, the pilot symbol is generated by constellation mapping of known bits, and other symbols in the M symbols are data symbols carrying service data, so that the data symbols can obtain differential gain, and the capability of resisting phase deflection caused by white noise is further enhanced.

in one possible design, two adjacent constellation points on the ring are respectively mapped with a first bit group and a second bit group, and only one bit in the bits corresponding to the same position in the first bit group and the second bit group has a different value, for example: the bit groups mapped by two adjacent constellation points are 0001 and 0011, and only one bit with a different value exists on the 3 rd bit of the two bit groups. The corresponding position is not limited in this embodiment, and may be any position in the bit group, but the corresponding positions in the two bit groups must be the same.

in a fourth aspect, the present application provides a digital demodulation method comprising: the receiving device receives M symbols from the transmitting device, for example: and the receiving equipment receives the modulation signal sent by the sending equipment, and demodulates the modulation signal to obtain M symbols. The receiving device obtains the amplitude and phase of the M symbols, assuming that the M symbols are represented as S'₁(B₁,α₁)、S′₂(B₂,α₂)、…、S′_i(B_i,α_i)、S′_M(B_M,α_M) I represents the number of symbols, i is greater than or equal to 1 and less than or equal to M, and i is a positive integer, B_iRepresenting the amplitude, alpha, of the ith symbol_iIndicating the phase of the ith symbol. The receiving device converts the phases alpha of the M symbols_iAdjusted to beta_iThe amplitude of the sign remains unchanged. The phase adjustment method comprises the following steps: in the case where i is 1, β_i＝α_i(ii) a When i is more than or equal to 2 and less than or equal to M and the amplitude of the i-1 th symbol is more than the amplitude threshold value BETA_thIn the case of (b), beta_i＝α_i-α_i-1(ii) a When i is more than or equal to 2 and less than or equal to M and the amplitude of the i-1 th symbol is less than the amplitude threshold value BETA_thIn the case of (b), beta_i＝α_i-α_i-1+β_i-1-α′_i-1，α′_i-1And the hard decision phase of the (i-1) th symbol is represented, and the hard decision phase represents the phase of the symbol and the constellation point closest to the symbol on the constellation diagram. The M symbols after phase adjustment are S₁(B₁,β₁)、S₂(B₂,β₂)、…、S_i(B_i,β_i)、S_M(B_M,β_M) According to the constellation diagram, the M symbols after the phase adjustment are subjected to constellation de-mapping to obtain M bit groups, the order of the constellation diagram is equal to the order of the symbols, and the constellation diagram used by the receiving equipment in the constellation de-mapping and the sending equipment are mappedThe used constellation diagrams are the same, and the receiving equipment decodes the M bit groups to obtain original data.

It should be noted that the receiving device may process a plurality of symbol sets in a parallel manner, and the processing method in the symbol set may refer to the description of the fourth aspect, which is not described herein again.

The constellation diagram in this application is similar to an Amplitude Phase Shift Keying (APSK) constellation diagram, where the number of rings in the constellation diagram is P, P is an integer greater than 2, and the radii of the P rings from inside to outside are: r is₁、r₂、…、r_P，r₁＜r₂＜…＜r_PA plurality of constellation points are distributed on the circular ring at equal intervals, bit groups mapped by two adjacent constellation points on the circular ring only have one bit with different values at corresponding positions, B_th＜r_P-1. The present application is provided with at least two reference rings, see description of the first aspect for the definition of rings.

In one possible design, N-4, P-2, the number of constellation points on each ring from inside to outside is 6 and 10, r₁＝0.4082r±10％，r₂＝1.2247r±10％，r₁＜Β_th＜r₂R is more than 0; or

n6, P5, the number of constellation points on each ring from inside to outside being 4, 10, 14, 18 and 18, r₁＝0.177r±10％，r₂＝0.4146r±10％，r₃＝0.6516r±10％，r₄＝1.1255r±10％，r₅＝1.3624r±10％，r₃＜Β_th＜r₄R is more than 0; or

n is 8, P is 9, and the number of constellation points on each ring from inside to outside is: 4. 28, 32 and 32, r₁＝0.1128r±10％，r₂＝0.4136r±10％，r₃＝0.5640r±10％、r₄＝0.7144r±10％、r₅＝0.8649r±10％、r₆＝1.0153r±10％、r₇＝1.1657r±10％、r₈＝1.3161r±10％、r₉＝1.4665±10％，r₁＜Β_th＜r₂，r＞0。

In one possible design, the first of the M symbols is a pilot symbol.

In one possible design, two adjacent constellation points on the ring are respectively mapped with a first bit group and a second bit group, and only one bit in the bits corresponding to the same position in the first bit group and the second bit group has a different value, for example: the bit groups mapped by two adjacent constellation points are 0001 and 0011, and only one bit with a different value exists on the 3 rd bit of the two bit groups. The corresponding position is not limited in this embodiment, and may be any position in the bit group, but the corresponding positions in the two bit groups must be the same.

In a fifth aspect, the present application provides an apparatus having functionality to implement the behavior of the sending device in the digital modulation method in each possible implementation of the first and third aspects. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above-described functions.

In another possible implementation manner, the apparatus includes: a receiver, a transmitter, a memory, and a processor; wherein the memory stores a set of program codes, and the processor is configured to call the program codes stored in the memory to perform the digital modulation method in each possible implementation manner of the first aspect and the third aspect.

Based on the same inventive concept, as the principle and the beneficial effects of the apparatus for solving the problems can refer to the method embodiments and the brought beneficial effects of the possible transmitting devices of the first aspect and the third aspect, the method can be referred to for implementation of the apparatus, and repeated details are not repeated.

In a sixth aspect, the present application provides an apparatus having a function of implementing the behavior of a receiving device in the digital demodulation method in each possible implementation manner of the second and fourth aspects. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software comprises one or more modules corresponding to the functions in each possible implementation of the second and fourth aspects.

In another possible implementation manner, the apparatus includes: a receiver, a transmitter, a memory, and a processor; wherein the memory stores a set of program codes, and the processor is configured to call the program codes stored in the memory and execute the digital demodulation method in any one of the possible implementations of the second aspect and the fourth aspect.

Based on the same inventive concept, as the principle and the beneficial effects of the apparatus for solving the problems can be referred to the method embodiments of the receiving device in each of the second aspect and the third aspect and the beneficial effects brought thereby, the method implementation can be referred to the implementation of the apparatus, and repeated details are not repeated.

In a seventh aspect, the present application provides a communication system comprising a transmitting device and a receiving device

The sending device is used for coding the original data to obtain a bit sequence;

Dividing the bit sequence into M bit groups; wherein, the bit group comprises N bits, M and N are integers which are more than or equal to 1;

Performing constellation mapping on the M bit groups according to a constellation diagram to obtain M symbols, wherein the phases of the M symbols are phi respectively₁、φ₂、…、φ_M(ii) a The number of the rings in the constellation diagram is P, P is an integer greater than 2, and the radiuses of the P rings from inside to outside are as follows: r is₁、r₂、…、r_P，r₁＜r₂＜…＜r_PA plurality of constellation points are distributed on the circular ring at equal intervals;

The phase phi of the symbol_iIs adjusted to theta_i(ii) a Wherein i is more than or equal to 1 and less than or equal to M, and i is an integer; in the case where i is 1, θ₁＝φ₁(ii) a In the case where i is 2. ltoreq. M, θ_i＝φ_i+φ_sum(i-1,A_th)；A_thRepresenting the amplitude threshold, A_th＜r_P-1；φ_sum(i-1,A_th) Indicating that the amplitude of the 1 st to i-1 st symbols is larger than the amplitude threshold A_thThe sum of the phases of all symbols of (1);

Sending the M symbols after the phase adjustment to the receiving equipment;

The receiving device is used for receiving the M symbols from the sending device; wherein the phases of the M symbols are respectively alpha₁、α₂、…、α_M；

The phase alpha of the symbol_iAdjusted to beta_i(ii) a Wherein i is more than or equal to 1 and less than or equal to M, and i is an integer; in the case where i is 1, β₁＝α₁(ii) a In the case of 2. ltoreq. i.ltoreq.M, beta_i＝α_i-α_min(i-1,B_th)，B_thRepresenting the amplitude threshold, alpha_min(i-1,B_th) Indicating that the amplitude of the 1 st to the i-1 st symbols in the M symbols is greater than an amplitude threshold B_thAnd the phase of the symbol closest to the ith symbol, B_th＜r_P-1；

According to the constellation diagram, performing constellation de-mapping on the M symbols after the phase adjustment to obtain M bit groups;

And decoding the M bit groups to obtain original data.

In one possible design, the set amplitude threshold a of the transmitting device_thAnd amplitude threshold B set by the receiving device_thApproximately equal, B_thIn A_thThe base floats up and down within a specified range, such as: (1-0.2) A_th＜B_th＜(1+0.2)*A_th。

In one possible design, two adjacent constellation points on the ring are respectively mapped with a first bit group and a second bit group, and only one bit in the bits corresponding to the same position in the first bit group and the second bit group has a different value, for example: the bit groups mapped by two adjacent constellation points are 0001 and 0011, and only one bit with a different value exists on the 3 rd bit of the two bit groups. The corresponding position is not limited in this embodiment, and may be any position in the bit group, but the corresponding positions in the two bit groups must be the same.

in an eighth aspect, the present application provides a communication system comprising a transmitting device and a receiving device;

The sending device is used for coding the original data to obtain a bit sequence;

Dividing the bit sequence into M bit groups; wherein, the bit group comprises N bits, M and N are integers which are more than or equal to 1;

Performing constellation mapping on the M bit groups according to a constellation diagram to obtain M symbols, wherein the phases of the M symbols are phi respectively₁、φ₂、…、φ_M(ii) a (ii) a The number of the rings in the constellation diagram is P, P is an integer greater than 2, and the radiuses of the P rings from inside to outside are as follows: r is₁、r₂、…、r_P，r₁＜r₂＜…＜r_PA plurality of constellation points are distributed on the circular ring at equal intervals;

The phase phi of the symbol_iIs adjusted to theta_i(ii) a Wherein i is more than or equal to 1 and less than or equal to M, and i is a positive integer; in the case where i is 1, θ₁＝φ₁(ii) a In the case where i is 2. ltoreq. M, θ_i＝φ_i+φ_i-1+…+φ₂+φ₁；

Sending the M symbols after the phase adjustment to the receiving equipment;

The receiving device is used for receiving the M symbols from the sending device; wherein the phases of the M symbols are respectively alpha₁、α₂、…、α_M；

The phases alpha of the M symbols_iAdjusted to beta_i(ii) a Wherein i is more than or equal to 1 and less than or equal to M, and i is an integer; in the case where i is 1, β₁＝α₁(ii) a When i is more than or equal to 2 and less than or equal to M and the amplitude of the i-1 th symbol is more than an amplitude threshold value B_thWhen P is greater than 2, B_th＜r_P-1，β_i＝α_i-α_i-1(ii) a Or when i is more than or equal to 2 and less than or equal to M and the amplitude value of the i-1 th symbol is less than or equal to the amplitude threshold value B_thwhen is beta_i＝α_i-α_i-1+β_i-1-α′_i-1，α′_i-1Representing a hard decision phase of an i-1 th symbol, wherein the hard decision phase represents a phase of a constellation point which is closest to the i-1 th symbol in a constellation diagram;

Performing constellation demapping on the M symbols after phase modulation according to the constellation diagram to obtain M bit groups;

Decoding the M bit groups to obtain original data; wherein the bit group comprises N bits.

In one possible design, the set amplitude threshold a of the transmitting device_thAnd amplitude threshold B set by the receiving device_thApproximately equal, B_thIn A_ththe base floats up and down within a specified range, such as: (1-0.2) A_th＜B_th＜(1+0.2)*A_th。

In one possible design, two adjacent constellation points on the ring are respectively mapped with a first bit group and a second bit group, and only one bit in the bits corresponding to the same position in the first bit group and the second bit group has a different value, for example: the bit groups mapped by two adjacent constellation points are 0001 and 0011, and only one bit with a different value exists on the 3 rd bit of the two bit groups. The corresponding position is not limited in this embodiment, and may be any position in the bit group, but the corresponding positions in the two bit groups must be the same.

Yet another aspect of the present application provides a computer-readable storage medium having stored therein instructions, which when executed on a computer, cause the computer to perform the method of the above-described aspects.

Yet another aspect of the present application provides a computer program product containing instructions which, when run on a computer, cause the computer to perform the method of the above-described aspects.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or the background art of the present invention, the drawings required to be used in the embodiments or the background art of the present invention will be described below.

Fig. 1 is a schematic structural diagram of a communication system according to an embodiment of the present invention;

Fig. 2a is an interaction diagram of a communication method according to an embodiment of the present invention;

Fig. 2b is a schematic structural diagram of a constellation diagram according to an embodiment of the present invention;

fig. 2c is another schematic structural diagram of a constellation diagram according to an embodiment of the present invention;

Fig. 2d is another schematic structural diagram of a constellation diagram according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of an apparatus according to an embodiment of the present invention;

FIG. 4 is another schematic diagram of an apparatus according to an embodiment of the present invention;

Fig. 5 is another schematic structural diagram of an apparatus according to an embodiment of the present invention.

Detailed Description

The embodiments of the present invention will be described below with reference to the drawings.

Fig. 1 is a schematic architecture diagram of a communication system according to an embodiment of the present invention, where the communication system includes a sending device 11 and a receiving device 12. The digital Communication System may be a Global System for mobile Communication (GSM), a Code Division Multiple Access (CDMA) System, a Wideband Code Division Multiple Access (WCDMA) System, a Worldwide Interoperability for Microwave Access (WiMAX) System, a Long Term Evolution (LTE) System, a 5G Communication System (e.g., a New Radio, NR) System, a Communication System in which Multiple Communication technologies are integrated (e.g., a Communication System in which LTE technology and NR technology are integrated), or a subsequent evolution Communication System.

The processing procedures of the transmitting device 11 include encoding processing, packet processing, constellation mapping, phase adjustment, and symbol modulation. The transmitting device 11 performs encoding processing on original data, which may be binary data, the encoding processing including source coding for performing information on the data and channel codingcompressing, namely reducing redundant information in the data, wherein channel coding is used for increasing the redundant information in the data so as to increase the reliability of the data; the sending device 11 performs encoding processing on the original data to obtain a binary bit sequence. The transmission device 11 then performs a grouping process on the bit sequences, and the transmission device 11 may perform a grouping process on the bit sequences according to a modulation order, which is equal to the number of bits in the bit group. For example: the modulation order is of order N and the transmitting device 11 divides the bit sequence into M bit groups, a bit group comprising N bits. Then, the transmitting device 11 performs constellation mapping on M bit groups according to the N-order constellation diagram to generate M symbols, where the constellation diagram represents a mapping relationship between the bit groups and amplitudes and phases, the amplitudes and phases of the M symbols obtained by performing constellation mapping on the M bit groups according to the N-order constellation diagram are known, and the obtained M symbols are assumed to be S1(a1, Φ)₁)、S₂(A₂,φ₂)、…、S_i(A_i,φ_i)、…S_M(A_M,φ_M) Wherein i is more than or equal to 1 and less than or equal to M, M and i are positive integers, A_iDenotes the amplitude, phi, of the ith symbol_iIndicating the phase of the ith symbol. The transmitting device 11 performs phase adjustment on the M symbols, and the method for phase adjustment includes a first method and a second method. The method comprises the following steps: will phase phi_iis adjusted to theta_iI is more than or equal to 1 and less than or equal to M; when i is 1, theta₁＝φ₁(ii) a When i is more than or equal to 2 and less than or equal to M, theta_i＝φ_i+φ_sum(i-1,A_th)，A_thRepresents the amplitude threshold, phi_sum(i-1,A_th) Indicating that the amplitude from the 1 st constellation point to the i-1 st constellation point is greater than an amplitude threshold A_thThe sum of the phases of all constellation points. For example: the 5 symbols after constellation mapping are S₁(A₁,φ₁)、S₂(A₂,φ₂)、S₃(A₄,φ₄)、S₅(A₅,φ₅) Let us assume that A₁＞A_th，A₂＜A_th，A₃＜A_th，A₄＞A_thAccording to the phase adjustment method of method one, theta₁＝φ₁，θ₂＝φ₂+φ₁，θ₃＝φ₃+φ₁，θ₄＝φ₄+φ₁，θ₅＝φ₅+φ₄+φ₁. Then, the transmitting device 11 loads the phase-adjusted symbol onto a high-frequency carrier, and transmits the symbol through an antenna port.

The second method comprises the following steps: will phase phi_iIs adjusted to theta_i，1≤i≤M；i＝1，θ₁＝φ₁(ii) a When i is more than or equal to 2 and less than or equal to M, theta_i＝φ_i+φ_i-1+…+φ₁. For example: the 5 symbols after constellation mapping are S₁(A₁,φ₁)、S₂(A₂,φ₂)、S₃(A₄,φ₄)、S₅(A₅,φ₅) Phase adjustment method according to method two, theta₁＝φ₁，θ₂＝φ₂+φ₁，θ₃＝φ₃+φ₂+φ₁，θ₄＝φ₄+φ₃+φ₂+φ₁，θ₅＝φ₅+φ₄+φ₃+φ₂+φ₁。

And the transmitting equipment loads the M symbols after the phase adjustment on a high-frequency carrier to generate a modulation signal, and transmits the modulation signal to the receiving equipment through a channel.

the receiving device receives the modulation signal, and the processing process of the modulation signal comprises the following steps: symbol demodulation, recombination processing, phase inverse adjustment, constellation de-mapping and decoding processing. First, the receiving device performs symbol demodulation on the received modulated signal, and converts the high-frequency modulated signal into M symbols of the baseband. It is easy to understand that, because the symbol can introduce interference in the transmission process of the channel, the amplitude and phase of the symbol can introduce noise; suppose M symbols obtained by symbol demodulation are S₁(B₁,α₁)、S₂(B₂,α₂)、S₃(B₃,α₃)、…、S_M(B_M,α_M) I is more than or equal to 1 and less than or equal to M, i and M are positive integers, S_irepresents the ith symbol, BETA_iRepresenting the amplitude, alpha, of the ith symbol_iIndicating the phase of the ith symbol. Then, the receiving device 12 obtains the phases and amplitudes of the M symbols, and the receiving device 12 performs phase inverse adjustment on the M symbols.

In a possible implementation manner, when the receiving device 12 determines that the transmitting device 11 adopts the phase adjustment method of method one, the receiving device 12 adopts a corresponding phase inverse adjustment method as follows: the phase alpha of the symbol_iAdjusted to beta_iWhen i is 1, β₁＝α₁When i is not less than 2 and not more than M, beta_i＝α_i-α_min(i-1,B_th)，Β_thRepresenting the amplitude threshold, alpha_min(i-1,B_th) Indicating that the amplitude of the 1 st to i-1 st symbols is larger than the amplitude threshold value B_thThe phase of the symbol which is the smallest from the ith symbol, the distance here being the difference between the serial numbers of the two symbols, e.g. two symbols are S₃and S₅Is 5-3-2. Suppose that: the receiving device 12 obtains 5 symbols S through symbol demodulation₁(B₁,α₁)、S₂(B₂,α₂)、S₃(B₃,α₃)、S₄(B₄,α₄)、S₅(B₅,α₅) Amplitude and amplitude threshold value BETA of comparison symbol of receiving apparatus 12_thSize of between, assume B₁＞B_th，B₂＜B_th，B₃＜B_th，B₄＞B_th，B₅＜B_thThen the amplitude of 5 symbols remains unchanged and beta is adjusted after phase adjustment₁＝α₁，β₂＝α₂-α₁，β₃＝α₃-α₁，β₄＝α₄-α₁，β₅＝α₅-α₄。

in another possible implementation manner, the receiving device 12 determines that the sending device 11 adopts the phase adjustment method of method two, and the receiving device adopts a corresponding phase inverse adjustment method that: the phase alpha of M symbols_iAdjusted to β i, where i is 1In the case of beta₁＝α₁(ii) a In the case where i is 2. ltoreq. M and the amplitude of the i-1 th symbol is greater than the amplitude threshold BETA, β i ═ α_i-α_i-1(ii) a When i is more than or equal to 2 and less than or equal to M and the amplitude of the i-1 th symbol is not more than amplitude threshold value BETA_thIn the case of (b), beta_i＝α_i-α_i-1+β_i-1-α′_i-1，α'_i-1And the hard decision phase of the (i-1) th symbol is represented, and the hard decision phase represents the phase of the constellation point closest to the constellation diagram. Suppose that: the receiving device 12 obtains 5 symbols S through symbol demodulation₁(B₁,α₁)、S₂(B₂,α₂)、S₃(B₃,α₃)、S₄(B₄,α₄)、S₅(B₅,α₅) Amplitude and amplitude threshold value BETA of comparison symbol of receiving apparatus 12_thSize of between, assume B₁＞B_th，B₂＜B_th，B₃＜B_th，B₄＞B_th，B₅＜B_thThen the 5 symbol amplitude remains unchanged. The receiving device 12 performs phase inversion on the 5 symbols to obtain: beta is a₁＝α₁，β₂＝α₂-α₁，β₃＝α₃-α₂+α₂-α₁-α'₂＝α₃-α₁-α'₂，β₄＝α₄-α₃+β₃-α'₃＝α₄-α₁-α'₂-α'₃。

The receiving device 12 performs constellation de-mapping according to the constellation diagram according to the symbol after the phase reverse adjustment to obtain M bit groups of N orders, and performs decoding processing on the N bit groups to obtain original data. The constellation de-mapping is an inverse process of the constellation mapping at the transmitting device 11, and the decoding processing is an inverse process of the encoding processing at the transmitting device 11, and the specific process is not described again.

It should be noted that the sending device 11 may notify the receiving device 12 of its own modulation scheme through Downlink Control Information (DCI), so that the receiving device 12 executes a corresponding demodulation scheme according to the modulation scheme.

the transmitting device and the receiving device in the present application are devices with wireless communication functions, and may be handheld devices, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to wireless modems, etc. with wireless communication functions. The sending device and the receiving device may be called different names in different networks, for example: user equipment, access terminal, subscriber unit, subscriber station, mobile station, remote terminal, mobile device, user terminal, Wireless communication device, user agent or user equipment, cellular telephone, cordless telephone, Session Initiation Protocol (SIP) telephone, Wireless Local Loop (WLL) station, Personal Digital Assistant (PDA), terminal equipment in a 5G network or future evolution network, and the like.

Referring to fig. 2a, fig. 2a is a phase adjustment method according to an embodiment of the present invention, which includes, but is not limited to, the following steps:

S201, the sending equipment carries out coding processing on the original data to obtain a bit sequence.

Specifically, the original data may be binary data, the transmitting device performs source coding, channel coding, interleaving coding, and the like on the original data, where the source coding includes but is not limited to shannon coding, feinuo coding, and huffman coding, the channel coding includes but is not limited to LDPC coding, parity check coding, CRC coding, and Turbo coding, and the transmitting device obtains a binary bit sequence after the encoding processing is performed on the original data.

S202, the transmitting device divides the bit sequence into M bit groups.

Specifically, the transmitting device divides the bit sequence into M bit groups according to the modulation order, and the number of bits included in a bit group is equal to the modulation order. For example: the bit sequence comprises 16 bits, the modulation order is 2, the transmitting device divides the bit sequence into 8 bit groups, and the bit groups comprise 2 bits.

And S203, the sending equipment performs constellation mapping on the M bit groups according to the constellation diagram to obtain M symbols.

Specifically, the constellation map represents a mapping relationship between the bit group and a coordinate of the constellation point, where the coordinate of the constellation point includes an amplitude and a phase. The order of the constellation is equal to the modulation order, for example, the modulation order is 2, and the constellation is a 4-point constellation; the modulation order is 4, and the constellation diagram is a 16-point constellation diagram; the modulation order is 6, and the constellation point is a 64-point constellation diagram. The constellation diagram of the present embodiment is similar to an APSK constellation diagram, the number of the rings in the constellation diagram is P, P is an integer greater than 2, and the diameter of the P rings from inside to outside is r₁、r₂、…、r_P，r₁＜r₂＜…＜r_P. In a possible implementation manner, two adjacent constellation points on the circular ring are respectively mapped with a first bit group and a second bit group, and only one bit in the bits corresponding to the same position in the first bit group and the second bit group has a different value, for example: the bit groups mapped by two adjacent constellation points are 0001 and 0011, and only one bit with a different value exists on the 3 rd bit of the two bit groups. The corresponding position is not limited in this embodiment, and may be any position in the bit group, but the corresponding positions in the two bit groups must be the same.

Optionally, the constellation diagram of the embodiment of the present invention satisfies: n-4, P-2, the number of constellation points on each ring from inside to outside of the constellation diagram is 6 and 10, r₁＝0.4082r±10％，r₂＝1.2247r±10％，r₁＜A_th＜r₂，r＞0，A_thRepresenting an amplitude threshold.

for example: referring to fig. 2b, the horizontal axis of fig. 2b is the x-axis, and the vertical axis is the y-axis, and fig. 2b shows the positive half-axis region of the constellation diagram on the y-axis, which is not shown on the negative half-axis region of the constellation diagram. As can be seen from fig. 2b, the constellation diagram includes 2 circular rings, and the radii of the 2 circular rings from inside to outside are: 0.4082, and 1.2247, the number of constellation points on each circle from inside to outside being 6 and 10. The bit mapping mode of the constellation points in the constellation diagram is quasi-gray code mapping, two adjacent constellation points on the circular ring are respectively mapped with a first bit group and a second bit group, and only one bit position in the bit positions corresponding to the same position in the first bit group and the second bit group has different values. It should be noted that the mapping manner of the constellation point and the bit group in this embodiment is not limited to that shown in fig. 2b, and "0" and "1" in the bit group may be interchanged based on the bit mapping in fig. 2b, or a left bit group and a right bit group are interchanged with the y-axis as the center, or an upper bit group and a lower bit group are interchanged with the x-axis as the center.

Optionally, the constellation diagram of the embodiment of the present invention satisfies: n-6, P-5, the number of constellation points on each ring from inside to outside of the constellation diagram is 4, 10, 14, 18 and 18, r₁＝0.177r±10％，r₂＝0.4146r±10％，r₃＝0.6516r±10％，r₄＝1.1255r±10％，r₅＝1.3624r±10％，r₃＜A_th＜r₄，r＞0，A_threpresenting an amplitude threshold.

For example: referring to fig. 2c, the horizontal axis of fig. 2c is the x-axis, and the vertical axis is the y-axis, and fig. 2c shows the positive half-axis region of the constellation diagram on the y-axis, which is not shown on the negative half-axis region of the constellation diagram. As can be seen from fig. 2c, the constellation includes 5 circular rings, and the radius of the 5 circular rings from inside to outside is: 0.1777, 0.4146, 0.6516, 1.1255 and 1.3624, the number of constellation points on each circle from inside to outside is 4, 10, 14, 18 and 18. The bit mapping mode of the constellation points in the constellation diagram is quasi-gray code mapping, two adjacent constellation points on the circular ring are respectively mapped with a first bit group and a second bit group, and only one bit position in the bit positions corresponding to the same position in the first bit group and the second bit group has different values. It should be noted that the mapping manner of the constellation point and the bit group in this embodiment is not limited to that shown in fig. 2c, and "0" and "1" in the bit group may be interchanged based on the bit mapping in fig. 2c, or the left bit group and the right bit group are interchanged with the y-axis as the center, or the upper bit group and the lower bit group are interchanged with the x-axis as the center.

Optionally, the constellation diagram of the embodiment of the present invention satisfies: n is 8, P is 9, the number of constellation points on each ring from inside to outside of the constellation diagram is: 4. 28, 32 and 32, r₁＝0.1128r±10％，r₂＝0.4136r±10％，r₃＝0.5640r±10％、r₄＝0.7144r±10％、r₅＝0.8649r±10％、r₆＝1.0153r±10％、r₇＝1.1657r±10％、r₈＝1.3161r±10％、r₉＝1.4665±10％，r₁＜A_th＜r₂，r＞0，A_threpresenting an amplitude threshold.

For example: referring to fig. 2d, which shows a partial region of the constellation diagram, the horizontal axis in fig. 2d is the x-axis, and the vertical axis is the y-axis, and fig. 2d shows a first quadrant region of the constellation diagram on the y-axis, which is not shown in the second quadrant to the fourth quadrant region of the constellation diagram. As can be seen from fig. 2d, the constellation diagram includes 9 circular rings, and the radii of the 9 circular rings from inside to outside are: 0.1128, 0.4136, 0.5640, 0.7144, 0.8649, 1.0153, 1.1657, 1.3161 and 1.4665, the number of constellation points on each circle from inside to outside being 4, 28, 32 and 32. The bit mapping mode of the constellation points in the constellation diagram is quasi-gray code mapping, two adjacent constellation points on the circular ring are respectively mapped with a first bit group and a second bit group, and only one bit position in the bit positions corresponding to the same position in the first bit group and the second bit group has different values. It should be noted that the mapping manner of the constellation point and the bit group in this embodiment is not limited to that shown in fig. 2d, and "0" and "1" in the bit group may be interchanged based on the bit mapping in fig. 2d, or the left bit group and the right bit group are interchanged with the y-axis as the center, or the upper bit group and the lower bit group are interchanged with the x-axis as the center.

Wherein, the amplitude and phase of M symbols obtained after the transmitting device maps the M bit groups onto the constellation diagram are known, and it is assumed that the M symbols are represented as:S₁(Α₁,φ₁)、S₂(A₂,φ₂)、…S_i(A_i,φ_i)、…、S_M-1(A_M-1,φ_M-1)、S_M(A_M,φ_M) I represents the number of symbols, i is not less than 1 and not more than M, i is a positive integer, A_iDenotes the amplitude, phi, of the ith symbol_iIndicating the phase of the ith symbol.

And S204, adjusting the symbol.

in one possible embodiment, the phase adjustment method one: the transmitting device converts the phases phi of the M symbols_iis adjusted to theta_iThe amplitude of the M symbols remains unchanged. The phase adjustment method comprises the following steps: when i is 1, theta₁＝φ₁(ii) a When i is more than or equal to 2 and less than or equal to M, theta_i＝φ_i+φ_sum(i-1,A_th)，Α_thRepresents the amplitude threshold, phi_sum(i-1,A_th) Indicating that the amplitude between the 1 st symbol and the i-1 th symbol is greater than the amplitude threshold A_thThe sum of the phases of all phases.

For example, M ═ 5, and 5 symbols are: s₁(Α₁,φ₁)、S₂(Α₂,φ₂)、S₃(Α₃,φ₃)、S₄(Α₄,φ₄)、S₅(Α₅,φ₅) The sending device compares the 5 symbols with the magnitude of the amplitude threshold as follows: a is₁＞Α_th，Α₂＜Α_th，Α₃＞Α_th，Α₄＞Α_th，Α₅＜Α_th(ii) a The result of the transmitting device adjusting the phases of the 5 symbols is: when i is 1, theta₁＝φ₁(ii) a When i is 2, the symbol before the symbol S2 is S1, and the symbol S₁Amplitude a of₁greater than an amplitude threshold value alpha_thThus theta₂＝φ₂+φ₁(ii) a When i is 3, the symbol S₃the preceding symbol being the symbol S₁And symbol S₂symbol S₁And symbol S₂In (1) only S₁Is greater than a preset magnitude, so that theta₃＝φ₃+φ₁(ii) a When i is 4, symbols before the symbol S4 are symbol S3, symbol S2 and symbol S1, and among the three symbols, symbol S is₁And symbol S₃Is greater than the amplitude threshold, so θ₄＝φ₄+φ₃+φ₁(ii) a When i is 5, symbols before the symbol S5 are S4, S3, S2 and S1, and the symbol S in the 4 symbols is S4, S3, S2 and S1₁Symbol S₃And symbol S₄Is greater than the amplitude threshold, so θ₅＝φ₅+φ₄+φ₃+φ₁。

In another possible embodiment, the phase adjustment method two: the transmitting device converts the phases phi of the M symbols_iIs adjusted to theta_iThe amplitude of the M symbols remains unchanged. The phase adjustment method comprises the following steps: when i is 1, theta₁＝φ₁(ii) a When i is more than or equal to 2 and less than or equal to M, theta_i＝φ_i+φ_i-1+…φ₂+φ₁。

For example, M ═ 5, and 5 symbols are: s₁(Α₁,φ₁)、S₂(Α₂,φ₂)、S₃(Α₃,φ₃)、S₄(Α₄,φ₄)、S₅(Α₅,φ₅) The result of the phase adjustment of the 5 symbols by the transmitting device is: when i is 1, theta₁＝φ₁(ii) a When i is 2, theta₂＝φ₂+φ₁(ii) a When i is 3, theta₃＝φ₃+φ₂+φ₁(ii) a When i is 4, theta₄＝φ₄+φ₃+φ₂+φ₁(ii) a When i is 5, theta₅＝φ₅+φ₄+φ₃+φ₂+φ₁。

It should be noted that the transmitting device may perform processing on a plurality of symbol sets in parallel by using the phase adjustment methods of S201 to S206, which may improve the processing efficiency of the transmitting device.

S205, the sending equipment sends M symbols to the receiving equipment, and the receiving equipment receives the M symbols from the sending equipment.

Specifically, the transmitting device performs operations such as OFDM modulation, resource mapping, layer mapping, and antenna port mapping on the phase-adjusted M symbols to obtain a modulated signal, and transmits the modulated signal to the receiving device. The receiving device performs channel equalization, down-conversion, demodulation, and the like on the modulated signal sent by the sending device to obtain M symbols, and it can be understood that noise is introduced into the M symbols generated by the sending device in the transmission process of the channel, where the noise includes amplitude noise, phase noise, and white noise. For example: the symbol sent by the sending device is S (a, phi), which introduces noise in the channel, and the corresponding symbol received by the receiving device is assumed to be S (a + deltaa, phi + phi)_P+φ_N) Δ A is the amplitude noise, φ, caused by white noise_PIs additive phase noise, phi_NPhase deflection caused by white noise. The receiving device obtains the amplitude and phase of the M symbols.

And S206, the transmitting equipment performs phase reversal adjustment on the symbols.

Specifically, the transmitting device obtains M symbols denoted as S₁(B₁,α₁)、S₂(B₂,α₂)、…S_i(Β_i,α_i)、…、S_M(Β_M,α_M) Wherein i represents the number of symbols, i is not less than 1 and not more than M, BETA_iRepresenting the amplitude, alpha, of the ith symbol_iindicating the phase of the ith symbol. The process of phase inversion adjustment is the reverse process of S203.

In a possible embodiment, a first phase inversion adjustment method corresponding to the first phase adjustment method: the receiving device converts the phases alpha of the M symbols_iAdjusted to beta_iThe amplitude remains unchanged. The phase modulation method comprises the following steps: when i is 1, beta₁＝α₁(ii) a When i is not less than 2 and not more than M, beta_i＝α_i-α_min(i-1,Β_th)，Β_thRepresenting the amplitude threshold, alpha_min(i-1,B_th) Indicates that the amplitude of 1 st to i-1 st symbols is greater than the amplitude threshold BETA_thAnd the phase of the symbol closest to the ith symbol, where the distance represents the distance between the ordinal numbers of two symbols, for example: symbol S₂And symbol S₅The distance between the symbols is 5-2-3, and the distance between the symbols is at least 1, which means that two symbols are adjacent symbols.

For example, M is 5, and 5 symbols are S₁(Β₁,α₁)、S₂(Β₂,α₂)、S₃(Β₃,α₃)、S₄(Β₄,α₄)、S₅(Β₅,α₅) The receiving equipment is used for receiving the amplitude and amplitude threshold value BETA of the 5 symbols_thThe results of comparison of the sizes of (a) and (b) are: BETA (BETA)₁＞Β_th，Β₂＜Β_th，Β₃＜Β_th，Β₄＞Β_th，Β₅＞Β_thThe 5 th symbol. When i is 1, beta₁＝α₁(ii) a When i is 2, the amplitude before the symbol S2 is larger than the threshold and the symbol closest to the symbol S2 is the symbol S1, so β is₂＝α₂-α₁(ii) a When i is 3, the amplitude before the symbol S3 is larger than the amplitude threshold and the symbol closest to the symbol S3 is the symbol S1, so β is₃＝α₃-α₁(ii) a When i is 4, the amplitude before the symbol S4 is larger than the amplitude threshold and the symbol closest to the symbol S3 is the symbol S1, so β is₄＝α₄-α₁(ii) a When i is 5, the amplitude before the symbol S5 is larger than the amplitude threshold and the symbol closest to the symbol S5 is the symbol S4, so β is₅＝α₅-α₄。

in another possible embodiment, a second phase inversion adjustment method corresponding to the second phase adjustment method: the receiving device converts the phases alpha of the M symbols_iAdjusted to beta_iThe phase of the M symbols remains unchanged. When i is 1, beta₁＝α₁(ii) a I is more than or equal to 2 and less than or equal to M, and the amplitude of the (i-1) th symbol is more than an amplitude threshold value BETA_thIn the case of (b), beta_i＝α_i-α_i-1(ii) a When i is not less than 2 and not more than M and the amplitude of the i-1 th symbol is not more than the amplitude threshold value BETA_thIn the case of (b), beta_i＝α_i-α_i-1+β_i-1-α′_i-1，α'_i-1Hard decision phase representing the i-1 th symbol, hard decision phase representing the symbol andThe phase of the closest constellation point in the constellation diagram. The coordinates of the symbols and the constellation points are expressed by complex numbers as a₁+b₁J and a₂+b₂J, between symbol and constellation point

For example, the 5 symbols obtained by symbol demodulation in the receiving device are S₁(B₁,α₁)、S₂(B₂,α₂)、S₃(B₃,α₃)、S₄(B₄,α₄)、S₅(B₅,α₅) Amplitude and amplitude threshold value BETA of comparison symbol of receiving equipment_thSize of between, assume B₁＞B_th，B₂＜B_th，B₃＜B_th，B₄＞B_th，B₅＜B_thThen the 5 symbol amplitude remains unchanged. The receiving device performs phase reversal adjustment on the 5 symbols to obtain: when i is 1, beta₁＝α₁When i is 2, the amplitude of the 1 st symbol is greater than the amplitude threshold, β₂＝α₂-α₁(ii) a The amplitude of the 2 nd symbol is less than the amplitude threshold when i is 3, and therefore, β₃＝α₃-α₂+α₂-α₁-α'₂＝α₃-α₁-α'₂When i is 4, the amplitude of the 3 rd symbol is smaller than the amplitude threshold, so β₄＝α₄-α₃+β₃-α'₃＝α₄-α₁-α'₂-α'₃(ii) a When i is 5, the amplitude of the 4 th symbol is greater than the amplitude threshold, so β₅＝α₅-α₄。

And S207, the receiving equipment performs constellation demapping on the M symbols to obtain M bit groups.

Specifically, the constellation map represents a mapping relationship between the bit groups and the constellation points, and the receiving device performs constellation demapping on the M symbols after the phase adjustment by using the constellation map which is the same as that of the transmitting device, so as to obtain M bit groups.

Optionally, N is 4, P is 2, the number of constellation points on each ring from inside to outside is 6 and 10, r₁＝0.4082r±10％，r₂＝1.2247r±10％，r₁＜B_th＜r₂And r is greater than 0. Wherein, B_thAnd A_thequal or unequal. The constellation diagram can refer to the example of fig. 2b, and is not described herein again.

Optionally, N is 6, P is 5, the number of constellation points on each ring from inside to outside is 4, 10, 14, 18, and 18, r1 is 0.177r ± 10%, r is₂＝0.4146r±10％，r₃＝0.6516r±10％，r₄＝1.1255r±10％，r₅＝1.3624r±10％，r₃＜B_th＜r₄，r＞0，B_thAnd A_thEqual or unequal. The constellation diagram can refer to the example of fig. 2c, and is not described herein again.

Optionally, N is 8, P is 9, and the number of constellation points on each ring from inside to outside is: 4. 28, 32 and 32, r₁＝0.1128r±10％，r₂＝0.4136r±10％，r₃＝0.5640r±10％、r₄＝0.7144r±10％、r₅＝0.8649r±10％、r₆＝1.0153r±10％、r₇＝1.1657r±10％、r₈＝1.3161r±10％、r₉＝1.4665±10％，r₁＜B_th＜r₂，r＞0，B_thAnd A_thEqual or unequal. The constellation diagram can refer to the example of fig. 2d, and is not described herein again.

And S208, decoding the M bit groups to obtain original data.

Specifically, the receiving device performs source decoding, channel decoding, interleaving decoding, and the like on the M bit groups to obtain original data, where the decoding process at this time is the inverse process of the encoding process of S201 in fig. 2 a.

It should be noted that the receiving device may perform digital demodulation processing of S206 to S208 on multiple symbol sets in a parallel manner, which may improve processing efficiency of the receiving device.

In a possible implementation manner, the first symbol in the M symbols may be a pilot symbol, all the M symbols except the first symbol are data symbols carrying traffic data, and information carried in the pilot symbol is known, so that all the data symbols carrying traffic data can obtain differential gain during demodulation, thereby improving the phase noise resistance.

By implementing the embodiment of the invention, the tolerance of the small amplitude point to the phase noise is weak, the tolerance of the large amplitude point to the phase noise is strong, and the symbols with the amplitude larger than the amplitude threshold value are subjected to phase accumulation, so that the symbols with the amplitude larger than the amplitude threshold value can obtain differential gain at a receiving end, and the anti-interference capability of a communication system to the phase is enhanced. In addition, the probability of continuously generating small-amplitude points is reduced by arranging a plurality of reference circular rings, so that strong anti-phase noise capability is kept, and the anti-phase noise robustness is improved.

The method of embodiments of the present invention is set forth above in detail and the apparatus of embodiments of the present invention is provided below.

Referring to fig. 3, fig. 3 is a schematic structural diagram of an apparatus according to an embodiment of the present invention, where the apparatus 3 may include a processing unit 301 and a sending unit 302.

a processing unit 301, configured to perform encoding processing on original data to obtain a bit sequence;

Dividing the bit sequence into M bit groups; wherein, the bit group comprises N bits, M and N are integers which are more than or equal to 1;

Performing constellation mapping on the M bit groups according to a constellation diagram to obtain M symbols, wherein the phases of the M symbols are phi respectively₁、φ₂、…、φ_M(ii) a (ii) a The number of the rings in the constellation diagram is P, P is an integer greater than 2, and the radiuses of the P rings from inside to outside are as follows: r is₁、r₂、…、r_P，r₁＜r₂＜…＜r_PA plurality of constellation points are distributed on the circular ring at equal intervals;

The phase phi of the symbol_iIs adjusted to theta_i(ii) a Wherein i is more than or equal to 1 and less than or equal to M, and i is an integer; in the case where i is 1, θ₁＝φ₁(ii) a In the case where i is 2. ltoreq. M, θ_i＝φ_i+φ_sum(i-1,A_th)；A_thRepresenting the amplitude threshold, A_th＜r_P-1；φ_sum(i-1,A_th) Indicating that the amplitude of the 1 st to i-1 st symbols is larger than the amplitude threshold A_thThe sum of the phases of all symbols of (1);

A sending unit 302, configured to send the phase-adjusted M symbols to a receiving device.

Optionally, N is 4, P is 2, the number of constellation points on each ring from inside to outside of the constellation diagram is 6 and 10, r₁＝0.4082r±10％，r₂＝1.2247r±10％，r₁＜A_th＜r₂R is more than 0; or

N-6, P-5, the number of constellation points on each ring from inside to outside of the constellation diagram is 4, 10, 14, 18 and 18, r₁＝0.1777r±10％，r₂＝0.4146r±10％，r₃＝0.6516r±10％，r₄＝1.1255r±10％，r₅＝1.3624r±10％，r₃＜A_th＜r₄R is more than 0; or

N is 8, P is 9, the number of constellation points on each ring from inside to outside of the constellation diagram is: 4. 28, 32 and 32, r₁＝0.1128r±10％，r₂＝0.4136r±10％，r₃＝0.5640r±10％、r₄＝0.7144r±10％、r₅＝0.8649r±10％、r₆＝1.0153r±10％、r₇＝1.1657r±10％、r₈＝1.3161r±10％、r₉＝1.4665±10％，r₁＜A_th＜r₂，r＞0。

Optionally, the first symbol of the M symbols is a pilot symbol.

optionally, two adjacent constellation points on the ring are respectively mapped with a first bit group and a second bit group, and only one bit in the bits corresponding to the same position in the first bit group and the second bit group has a different value, for example: the bit groups mapped by two adjacent constellation points are 0001 and 0011, and only one bit with a different value exists on the 3 rd bit of the two bit groups. The corresponding position is not limited in this embodiment, and may be any position in the bit group, but the corresponding positions in the two bit groups must be the same.

The device 3 may be a transmitting device, and the device 3 may also be a field-programmable gate array (FPGA), an application-specific integrated chip (asic), a system on chip (SoC), a Central Processing Unit (CPU), a Network Processor (NP), a digital signal processing circuit, a Micro Controller Unit (MCU), or a Programmable Logic Device (PLD) or other integrated chips, which implement related functions.

The embodiment of the present invention and the embodiment of the method in fig. 2a are based on the same concept, and the technical effects brought by the embodiment of the present invention are also the same, and the specific process can refer to the description of the embodiment of the method in fig. 2a, and will not be described again here.

Referring to fig. 4, fig. 4 is a schematic structural diagram of an apparatus according to an embodiment of the present invention, where the apparatus 4 may include a receiving unit 401 and a processing unit 402.

In a possible implementation, the receiving unit 401 is configured to receive M symbols from a transmitting device; wherein the phases of the M symbols are respectively alpha₁、α₂、…、α_M(ii) a M is an integer greater than 1.

A processing unit 402 for converting the phase α of the symbol_iAdjusted to beta_i(ii) a Wherein i is more than or equal to 1 and less than or equal to M, and i is an integer; in the case where i is 1, β₁＝α₁(ii) a In the case of 2. ltoreq. i.ltoreq.M, beta_i＝α_i-α_min(i-1,B_th)；B_thRepresenting the amplitude threshold, alpha_min(i-1,B_th) Indicating that the amplitude of the 1 st to the i-1 st symbols in the M symbols is greater than an amplitude threshold B_thAnd the phase of the symbol closest to the ith symbol;

According to the constellation diagram, performing constellation de-mapping on the M symbols after the phase adjustment to obtain M bit groups; the number of the rings in the constellation diagram is P, P is an integer greater than 2, and the radiuses of the P rings from inside to outside are as follows: r is₁、r₂、…、r_P，r₁≤r₂≤…≤r_Pconstellation points, B, are distributed on the ring at equal intervals_th＜r_P-1；

decoding the M bit groups to obtain original data; wherein the bit group comprises N bits, and N is an integer greater than or equal to 1.

in another possible implementation, the receiving unit 401 is configured to receive M symbols from a sending device; wherein the phases of the M symbols are respectively alpha₁、α₂、…、α_M(ii) a Wherein M is an integer greater than 1.

A processing unit 402 for converting the phase α of the symbol_iAdjusted to beta_i(ii) a Wherein i is more than or equal to 1 and less than or equal to M, and i is an integer; in the case where i is 1, β₁＝α₁(ii) a When i is more than or equal to 2 and less than or equal to M and the amplitude of the i-1 th symbol is more than an amplitude threshold value B_thIn the case of (b), beta_i＝α_i-α_i-1(ii) a Or when i is more than or equal to 2 and less than or equal to M and the amplitude value of the i-1 th symbol is less than or equal to the amplitude threshold value B_thWhen is beta_i＝α_i-α_i-1+β_i-1-α′_i-1，α'_i-1Representing a hard decision phase of an i-1 th symbol, wherein the hard decision phase represents a phase of a constellation point which is closest to the i-1 th symbol in a constellation diagram;

Performing constellation demapping on the M symbols after phase modulation according to the constellation diagram to obtain M bit groups; the number of the rings in the constellation diagram is P, P is an integer greater than 2, and the radiuses of the P rings from inside to outside are as follows: r is₁、r₂、…、r_P，r₁＜r₂＜…＜r_PA plurality of constellation points, B, are distributed on the ring at equal intervals_th＜r_P-1；

decoding the M bit groups to obtain original data; wherein the bit group comprises N bits, and N is an integer greater than or equal to 1.

Optionally, N is 4, P is 2, the number of constellation points on each ring from inside to outside is 6 and 10, r₁＝0.4082r±10％，r₂＝1.2247r±10％，r₁＜B_th＜r₂R is more than 0; or

N6, P5, the number of constellation points on each ring from inside to outside being 4, 10, 14, 18 and 18, r₁＝0.177r±10％，r₂＝0.4146r±10％，r₃＝0.6516r±10％，r₄＝1.1255r±10％，r₅＝1.3624r±10％，r₃＜B_th＜r₄R is more than 0; or

N is 8, P is 9, and the number of constellation points on each ring from inside to outside is: 4. 28, 32 and 32, r₁＝0.1128r±10％，r₂＝0.4136r±10％，r₃＝0.5640r±10％、r₄＝0.7144r±10％、r₅＝0.8649r±10％、r₆＝1.0153r±10％、r₇＝1.1657r±10％、r₈＝1.3161r±10％、r₉＝1.4665±10％，r₁＜B_th＜r₂，r＞0。

Optionally, the first symbol of the M symbols is a pilot symbol.

The device 4 may be a receiving device, and the device 4 may also be a field-programmable gate array (FPGA), an application-specific integrated chip (asic), a system on chip (SoC), a Central Processing Unit (CPU), a Network Processor (NP), a digital signal processing circuit, a Micro Controller Unit (MCU), or a Programmable Logic Device (PLD) or other integrated chips, which implement related functions.

The embodiment of the present invention and the embodiment of the method in fig. 2a are based on the same concept, and the technical effects brought by the embodiment of the present invention are also the same, and the specific process can refer to the description of the embodiment of the method in fig. 2a, and will not be described again here.

Fig. 5 is a schematic structural diagram of an apparatus according to an embodiment of the present invention, which is hereinafter referred to as an apparatus 5, where the apparatus 5 may be integrated in the foregoing transmitting device or receiving device, as shown in fig. 5, the apparatus includes: memory 502, processor 501, transmitter 504, and receiver 503.

The memory 502 may be a separate physical unit, which may be connected to the processor 501, the transmitter 504 and the receiver 503 by a bus. The memory 502, the processor 501, the transmitter 504, and the receiver 501 may also be integrated, implemented in hardware, etc.

The memory 502 is used for storing a program for implementing the above method embodiment, or various modules of the apparatus embodiment, and the processor 901 calls the program to perform the operations of the above method embodiment.

Alternatively, when part or all of the digital modulation method or the digital demodulation method of the above embodiments is implemented by software, the apparatus may also include only a processor. The memory for storing the program is located outside the device and the processor is connected to the memory by means of circuits/wires for reading and executing the program stored in the memory.

The processor may be a Central Processing Unit (CPU), a Network Processor (NP), or a combination of a CPU and an NP.

The processor may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a Programmable Logic Device (PLD), or a combination thereof. The PLD may be a Complex Programmable Logic Device (CPLD), a field-programmable gate array (FPGA), a General Array Logic (GAL), or any combination thereof.

The memory may include volatile memory (volatile memory), such as random-access memory (RAM); the memory may also include a non-volatile memory (non-volatile) such as a flash memory (flash memory), a Hard Disk Drive (HDD) or a solid-state drive (SSD); the memory may also comprise a combination of memories of the kind described above.

In the above embodiments, the sending module or the transmitter performs the sending steps of the above various method embodiments, the receiving module or the receiver performs the receiving steps of the above various method embodiments, and other steps are performed by other modules or processors. The transmitting module and the receiving module may constitute a transceiver module, and the receiver and the transmitter may constitute a transceiver.

The embodiment of the present application further provides a computer storage medium, which stores a computer program for executing the digital modulation method or the digital demodulation method provided by the above embodiment.

Embodiments of the present application further provide a computer program product containing instructions, which when run on a computer, cause the computer to execute the digital modulation method or the digital demodulation method provided by the above embodiments.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

the present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

Claims (18)

1. A digital modulation method, comprising:

Encoding the original data to obtain a bit sequence;

Dividing the bit sequence into M bit groups; wherein the bit group comprises N bits, M and N are integers greater than or equal to 1;

Performing constellation mapping on the M bit groups according to a constellation diagram to obtain M symbols, wherein the phases of the M symbols are phi respectively₁、φ₂、…、φ_M(ii) a The number of the rings in the constellation diagram is P, P is an integer greater than 2, and the radiuses of the P rings from inside to outside are as follows: r is₁、r₂、…、r_P，r₁＜r₂＜…＜r_PA plurality of constellation points are distributed on the circular ring at equal intervals;

The phase phi of the symbol_iIs adjusted to theta_i(ii) a Wherein i is more than or equal to 1 and less than or equal to M, and i is an integer; in the case where i is 1, θ₁＝φ₁(ii) a In the case where i is 2. ltoreq. M, θ_i＝φ_i+φ_sum(i-1,A_th)；A_thRepresenting the amplitude threshold, A_th＜r_P-1；φ_sum(i-1,A_th) Indicating that the amplitude of the 1 st to i-1 st symbols is larger than the amplitude threshold A_thThe sum of the phases of all symbols of (1);

And sending the M symbols after the phase adjustment to receiving equipment.

2. the method of claim 1,

N-4, P-2, the number of constellation points on each ring from inside to outside of the constellation diagram is 6 and 10, r₁＝0.4082r±10％，r₂＝1.2247r±10％，r₁＜A_th＜r₂R is more than 0; or

N-6, P-5, the number of constellation points on each ring from inside to outside of the constellation diagram is 4, 10, 14, 18 and 18, r₁＝0.1777r±10％，r₂＝0.4146r±10％，r₃＝0.6516r±10％，r₄＝1.1255r±10％，r₅＝1.3624r±10％，r₃＜A_th＜r₄R is more than 0; or

N is 8, P is 9, the number of constellation points on each ring from inside to outside of the constellation diagram is: 4. 28, 32 and 32, r₁＝0.1128r±10％，r₂＝0.4136r±10％，r₃＝0.5640r±10％、r₄＝0.7144r±10％、r₅＝0.8649r±10％、r₆＝1.0153r±10％、r₇＝1.1657r±10％、r₈＝1.3161r±10％、r₉＝1.4665±10％，r₁＜A_th＜r₂，r＞0。

3. The method of claim 1 or 2, wherein a first symbol of the M symbols is a pilot symbol.

4. The method according to any one of claims 1 to 3, wherein a first bit group and a second bit group are respectively mapped to two adjacent constellation points on the circular ring, and the value of only one bit in the bits corresponding to the same position in the first bit group and the second bit group is different.

5. A digital demodulation method, comprising:

Receiving M symbols from a transmitting device, wherein the phases of the M symbols are respectively alpha₁、α₂、…、α_M(ii) a Wherein M is an integer greater than 1;

The phase alpha of the symbol_iAdjusted to beta_i(ii) a Wherein i is more than or equal to 1 and less than or equal to M, and i is an integer; in the case where i is 1, β₁＝α₁(ii) a In the case of 2. ltoreq. i.ltoreq.M, beta_i＝α_i-α_min(i-1,B_th)；B_thRepresenting the amplitude threshold, alpha_min(i-1,B_th) Indicating that the amplitude of the 1 st to the i-1 st symbols in the M symbols is greater than an amplitude threshold B_thAnd the phase of the symbol closest to the ith symbol;

according to the constellation diagram, performing constellation de-mapping on the M symbols after the phase adjustment to obtain M bit groups; the number of the rings in the constellation diagram is P, P is an integer greater than 2, and the radiuses of the P rings from inside to outside are as follows: r is₁、r₂、…、r_P，r₁≤r₂≤…≤r_PA plurality of constellation points B are distributed on the circular ring at equal intervals_th＜r_P-1；

Decoding the M bit groups to obtain original data; wherein the bit group comprises N bits, N being an integer greater than or equal to 1.

6. A digital demodulation method, comprising:

receiving M symbols from a transmitting device, wherein the phases of the M symbols are respectively alpha₁、α₂、…、α_M(ii) a Wherein M is an integer greater than 1;

The phase alpha of the symbol_iAdjusted to beta_i(ii) a Wherein i is more than or equal to 1 and less than or equal to M, and i is an integer; in the case where i is 1, β₁＝α₁(ii) a When i is more than or equal to 2 and less than or equal to M and the amplitude of the i-1 th symbol is more than an amplitude threshold value B_thin the case of (b), beta_i＝α_i-α_i-1(ii) a Or when i is more than or equal to 2 and less than or equal to M and the amplitude value of the i-1 th symbol is less than or equal to the amplitude threshold value B_thWhen is beta_i＝α_i-α_i-1+β_i-1-α_i'_-1，α'_i-1Representing a hard decision phase of an i-1 th symbol, wherein the hard decision phase represents a phase of a constellation point which is closest to the i-1 th symbol in a constellation diagram;

performing constellation demapping on the M symbols after phase modulation according to the constellation diagram to obtain M bit groups; the number of the rings in the constellation diagram is P, P is an integer greater than 2, and the radiuses of the P rings from inside to outside are as follows: r is₁、r₂、…、r^P，r₁＜r₂＜…＜r_PThe constellation points on the ring are distributed at equal intervals, B_th＜r_P-1；

Decoding the M bit groups to obtain original data; wherein the bit group comprises N bits, N being an integer greater than or equal to 1.

7. The method according to claim 5 or 6,

N-4, P-2, the number of constellation points on each ring from inside to outside being 6 and 10, r₁＝0.4082r±10％，r₂＝1.2247r±10％，r₁＜B_th＜r₂R is more than 0; or

N6, P5, the number of constellation points on each ring from inside to outside is 4, 10, 14, 18 and 18, r1 is 0.177r ± 10%, r₂＝0.4146r±10％，r₃＝0.6516r±10％，r₄＝1.1255r±10％，r₅＝1.3624r±10％，r₃＜B_th＜r₄R is more than 0; or

N is 8, P is 9, and the number of constellation points on each ring from inside to outside is: 4. 28, 32 and 32, r₁＝0.1128r±10％，r₂＝0.4136r±10％，r₃＝0.5640r±10％、r₄＝0.7144r±10％、r₅＝0.8649r±10％、r₆＝1.0153r±10％、r₇＝1.1657r±10％、r₈＝1.3161r±10％、r₉＝1.4665±10％，r₁＜B_th＜r₂，r＞0。

8. The method of any one of claims 4 to 7, wherein a first symbol of the M symbols is a pilot symbol.

9. An apparatus, comprising: a memory, a processor, and a transmitter, the memory storing program code, the processor invoking the program code for performing the following:

Encoding the original data to obtain a bit sequence;

dividing the bit sequence into M bit groups; wherein the bit group comprises N bits, M and N are integers greater than or equal to 1;

Performing constellation mapping on the M bit groups according to a constellation diagram to obtain M symbols, wherein the phases of the M symbols are phi respectively₁、φ₂、…、φ_M(ii) a The number of the rings in the constellation diagram is P, P is an integer greater than 2, and the radiuses of the P rings from inside to outside are as follows: r is₁、r₂、…、r_P，r₁＜r₂＜…＜r_Pa plurality of constellation points are distributed on the circular ring at equal intervals;

The phase phi of the symbol_iIs adjusted to theta_i(ii) a Wherein i is more than or equal to 1 and less than or equal to M, and i is an integer; in the case where i is 1, θ₁＝φ₁(ii) a In the case where i is 2. ltoreq. M, θ_i＝φ_i+φ_sum(i-1,A_th)；A_thRepresenting the amplitude threshold, A_th＜r_P-1；φ_sum(i-1,A_th) Indicating that the amplitude of the 1 st to i-1 st symbols is larger than the amplitude threshold A_thThe sum of the phases of all symbols of (1);

And the transmitter is used for sending the M symbols after the phase adjustment to receiving equipment.

10. The apparatus of claim 9,

N-4, P-2, the number of constellation points on each ring from inside to outside of the constellation diagram is 6 and 10, r₁＝0.4082r±10％，r₂＝1.2247r±10％，r₁＜A_th＜r₂R is more than 0; or

N-6, P-5, the number of constellation points on each ring from inside to outside of the constellation diagram is 4, 10, 14, 18 and 18, r₁＝0.1777r±10％，r₂＝0.4146r±10％，r₃＝0.6516r±10％，r₄＝1.1255r±10％，r₅＝1.3624r±10％，r₃＜A_th＜r₄R is more than 0; or

N is 8, P is 9, the number of constellation points on each ring from inside to outside of the constellation diagram is: 4. 28, 32 and 32, r₁＝0.1128r±10％，r₂＝0.4136r±10％，r₃＝0.5640r±10％、r₄＝0.7144r±10％、r₅＝0.8649r±10％、r₆＝1.0153r±10％、r₇＝1.1657r±10％、r₈＝1.3161r±10％、r₉＝1.4665±10％，r₁＜A_th＜r₂，r＞0。

11. The apparatus of claim 9 or 10, wherein a first symbol of the M symbols is a pilot symbol.

12. the apparatus according to any one of claims 9 to 11, wherein a first bit group and a second bit group are respectively mapped to two adjacent constellation points on the circular ring, and a value of only one bit among bits corresponding to the same position in the first bit group and the second bit group is different.

13. An apparatus, comprising: a receiver, a memory, and a processor;

The receiver is used for receiving M symbols from the transmitting device, and the phases of the M symbols are respectively alpha₁、α₂、…、α_M(ii) a Wherein; m is an integer greater than 1;

The memory stores program code that the processor invokes for performing the following:

Will be describedPhase alpha of the symbol_iAdjusted to beta_i(ii) a Wherein i is more than or equal to 1 and less than or equal to M, and i is an integer; in the case where i is 1, β₁＝α₁(ii) a In the case of 2. ltoreq. i.ltoreq.M, beta_i＝α_i-α_min(i-1,B_th)；B_threpresenting the amplitude threshold, alpha_min(i-1,B_th) Indicating that the amplitude of the 1 st to the i-1 st symbols in the M symbols is greater than an amplitude threshold B_thAnd the phase of the symbol closest to the ith symbol;

According to the constellation diagram, performing constellation de-mapping on the M symbols after the phase adjustment to obtain M bit groups; the number of the rings in the constellation diagram is P, P is an integer greater than 2, and the radiuses of the P rings from inside to outside are as follows: r is₁、r₂、…、r_P，r₁≤r₂≤…≤r_PThe said ring has constellation points, B, distributed at equal intervals_th＜r_P-1；

decoding the M bit groups to obtain original data; wherein the bit group comprises N bits, N being an integer greater than or equal to 1.

14. An apparatus, comprising: a receiver, a memory, and a processor;

The receiver is used for receiving M symbols from the transmitting device, and the phases of the M symbols are respectively alpha₁、α₂、…、α_M(ii) a Wherein M is an integer greater than 1;

The memory stores program code that the processor invokes for performing the following:

The phase alpha of the symbol_iAdjusted to beta_i(ii) a Wherein i is more than or equal to 1 and less than or equal to M, and i is an integer; in the case where i is 1, β₁＝α₁(ii) a When i is more than or equal to 2 and less than or equal to M and the amplitude of the i-1 th symbol is more than an amplitude threshold value B_thin the case of (b), beta_i＝α_i-α_i-1(ii) a Or when i is more than or equal to 2 and less than or equal to M and the amplitude value of the i-1 th symbol is less than or equal to the amplitude threshold value B_thWhen is beta_i＝α_i-α_i-1+β_i-1-α_i'_-1，α'_i-1Representing a hard decision phase of an i-1 th symbol, wherein the hard decision phase represents a phase of a constellation point which is closest to the i-1 th symbol in a constellation diagram;

Performing constellation demapping on the M symbols after phase modulation according to the constellation diagram to obtain M bit groups; the number of the rings in the constellation diagram is P, P is an integer greater than 2, and the radiuses of the P rings from inside to outside are as follows: r is₁、r₂、…、r_P，r₁＜r₂＜…＜r_PA plurality of constellation points B are distributed on the circular ring at equal intervals_th＜r_P-1；

Decoding the M bit groups to obtain original data; wherein the bit group comprises N bits, N being an integer greater than or equal to 1.

15. The apparatus of claim 13 or 14,

N-4, P-2, the number of constellation points on each ring from inside to outside being 6 and 10, r₁＝0.4082r±10％，r₂＝1.2247r±10％，r₁＜B_th＜r₂R is more than 0; or

N6, P5, the number of constellation points on each ring from inside to outside being 4, 10, 14, 18 and 18, r₁＝0.177r±10％，r₂＝0.4146r±10％，r₃＝0.6516r±10％，r₄＝1.1255r±10％，r₅＝1.3624r±10％，r₃＜B_th＜r₄R is more than 0; or

n is 8, P is 9, and the number of constellation points on each ring from inside to outside is: 4. 28, 32 and 32, r₁＝0.1128r±10％，r₂＝0.4136r±10％，r₃＝0.5640r±10％、r₄＝0.7144r±10％、r₅＝0.8649r±10％、r₆＝1.0153r±10％、r₇＝1.1657r±10％、r₈＝1.3161r±10％、r₉＝1.4665±10％，r₁＜B_th＜r₂，r＞0。

16. The method of claim 15, wherein a first symbol of the M symbols is a pilot symbol.

17. A communication system comprising a transmitting device and a receiving device;

The sending device is used for coding the original data to obtain a bit sequence;

Dividing the bit sequence into M bit groups; wherein the bit group comprises N bits, M and N are integers greater than or equal to 1;

Performing constellation mapping on the M bit groups according to a constellation diagram to obtain M symbols, wherein the phases of the M symbols are phi respectively₁、φ₂、…、φ_M(ii) a The number of the rings in the constellation diagram is P, P is an integer greater than 2, and the radiuses of the P rings from inside to outside are as follows: r is₁、r₂、…、r_P，r₁＜r₂＜…＜r_PA plurality of constellation points are distributed on the circular ring at equal intervals;

The phase phi of the symbol_iIs adjusted to theta_i(ii) a Wherein i is more than or equal to 1 and less than or equal to M, and i is an integer; in the case where i is 1, θ₁＝φ₁(ii) a In the case where i is 2. ltoreq. M, θ_i＝φ_i+φ_sum(i-1,A_th)；A_thRepresenting the amplitude threshold, A_th＜r_P-1；φ_sum(i-1,A_th) Indicating that the amplitude of the 1 st to i-1 st symbols is larger than the amplitude threshold A_thThe sum of the phases of all symbols of (1);

Sending the M symbols after the phase adjustment to the receiving equipment;

the receiving device is configured to receive M symbols from the transmitting device, where phases of the M symbols are α₁、α₂、…、α_M；

The phase alpha of the symbol_iAdjusted to beta_i(ii) a Wherein i is more than or equal to 1 and less than or equal to M, and i is an integer; in the case where i is 1,β₁＝α₁(ii) a In the case of 2. ltoreq. i.ltoreq.M, beta_i＝α_i-α_min(i-1,B_th)，B_thRepresenting the amplitude threshold, alpha_min(i-1,B_th) Indicating that the amplitude of the 1 st to the i-1 st symbols in the M symbols is greater than an amplitude threshold B_thAnd the phase of the symbol closest to the ith symbol, B_th＜r_P-1；

According to the constellation diagram, performing constellation de-mapping on the M symbols after the phase adjustment to obtain M bit groups;

And decoding the M bit groups to obtain original data.

18. A communication system comprising a transmitting device and a receiving device;

The sending device is used for coding the original data to obtain a bit sequence;

Dividing the bit sequence into M bit groups; wherein the bit group comprises N bits, M and N are integers greater than or equal to 1;

Performing constellation mapping on the M bit groups according to a constellation diagram to obtain M symbols, wherein the phases of the M symbols are phi respectively₁、φ₂、…、φ_M(ii) a The number of the rings in the constellation diagram is P, P is an integer greater than 2, and the radiuses of the P rings from inside to outside are as follows: r is₁、r₂、…、r_P，r₁＜r₂＜…＜r_PA plurality of constellation points are distributed on the circular ring at equal intervals,

the phase phi of the symbol_iIs adjusted to theta_i(ii) a Wherein i is more than or equal to 1 and less than or equal to M, and i is a positive integer; in the case where i is 1, θ₁＝φ₁(ii) a In the case where i is 2. ltoreq. M, θ_i＝φ_i+φ_i-1+…+φ₂+φ₁；

Sending the M symbols after the phase adjustment to the receiving equipment;

The receiving device is used for receiving M symbols from the sending device, and the phases of the M symbols are respectivelyα₁、α₂、…、α_M；

The phase alpha of the symbol_iAdjusted to beta_i(ii) a Wherein i is more than or equal to 1 and less than or equal to M, and i is an integer; in the case where i is 1, β₁＝α₁(ii) a When i is more than or equal to 2 and less than or equal to M and the amplitude of the i-1 th symbol is more than an amplitude threshold value B_thIn the case of (B)_th＜r_P-1，β_i＝α_i-α_i-1(ii) a Or when i is more than or equal to 2 and less than or equal to M and the amplitude value of the i-1 th symbol is less than or equal to the amplitude threshold value B_thWhen is beta_i＝α_i-α_i-1+β_i-1-α_i-1，α′_i-1representing a hard decision phase of an i-1 th symbol, wherein the hard decision phase represents a phase of a constellation point which is closest to the i-1 th symbol in a constellation diagram;

Performing constellation demapping on the M symbols after phase modulation according to the constellation diagram to obtain M bit groups;

Decoding the M bit groups to obtain original data; wherein the group of bits comprises N bits.