A satellite wideband and narrowband integrated access and transmission method and device

Abstract

The present invention provides a satellite wideband and narrowband integrated access and transmission method and device. The method includes: generating a waveform signal to be transmitted at a sending end; based on N preconfigured subcarriers, performing serial-to-parallel conversion on the serial broadband waveform signal to obtain N - n data streams, and allocating n narrowband waveform signals and N - n broadband waveform signals to the N subcarriers; based on a preset algorithm, using the broadband waveform signal and the narrowband waveform signal of the current subcarrier to determine the output waveform of the sending end; receiving the output waveform at a receiving end, and using a preconfigured demodulation algorithm to restore the output waveform to the waveform signal to be transmitted. In the present invention, the narrowband waveform signal and the broadband waveform signal do not require subband filtering processing, can perform IFFT transformation simultaneously, different subcarriers are completely orthogonal in the frequency domain, the demodulation of wideband and narrowband users will not interfere with each other, and the frequency band utilization rate is high.

Description

Technical Field

[0001] The present invention relates to the technical field of mobile Internet, and particularly to a satellite wide and narrowband integrated access transmission method and device. Background Art

[0002] Driven by the continuous promotion of new service requirements such as mobile Internet and Internet of Things, 5G has been rapidly developed. However, in the ocean, desert, mountain plateau and remote rural areas, ground 5G cannot achieve wide-area coverage. Low-Earth-orbit satellites have a low orbital altitude, short transmission delay and small path loss. A constellation composed of multiple satellites can achieve true global coverage. Therefore, low-Earth-orbit satellites can form complementary advantages with ground communication networks to provide all-round coverage connection and services of space-air-ground integration.

[0003] In the context of the integration of multi-scenarios of space and ground, there are differential services such as hotspot broadband coverage, high-mobility platform mobile access and space-ground massive IoT. The service requirements of hotspot broadband coverage mainly focus on high-speed large-bandwidth transmission, and need to provide a larger transmission rate and a larger coverage area; the service requirements of high-mobility platform mobile access mainly focus on medium and low rate transmission and a smaller end-to-end delay; the service requirements of space-ground massive IoT mainly focus on low rate transmission and massive user concurrent access. Therefore, the differential service requirements of wide and narrow bands pose higher requirements for satellite access transmission technology, and it is necessary to develop a wide and narrowband integrated access transmission waveform and system that can flexibly adapt to the differential data transmission requirements of wide and narrow bands at the same time. At the same time, with the continuous development of communication technology, spectrum resources are becoming increasingly scarce, and high spectrum utilization rate is also an important requirement for wide and narrowband integrated access transmission waveform and system.

[0004] However, the ideas for differential service access transmission requirements mainly focus on two aspects: one is to adopt the traditional on-demand customization idea, that is, to design different access transmission waveforms and satellite constellation systems for requirements such as broadband communication and large-capacity IoT respectively. For example, the Starlink constellation is mainly designed based on the DVB system, focusing on broadband transmission services such as hotspot backhaul, and the Beidou system realizes the backhaul of massive user collected information based on self-developed narrowband short message communication. This method has disadvantages such as not supporting on-demand adjustment according to services, large construction cost and long cycle. The other is that the wide and narrowband waveforms and systems share the satellite platform, but the access resources and waveform design are strictly isolated and independently designed. This method has disadvantages such as poor flexibility and large resource overhead. Currently, taking F-OFDM as an example, through sub-band filtering processing, the fusion of multiple service waveforms in the frequency domain can be realized. However, to avoid interference, there is a certain guard interval or CP for different service waveforms, which reduces the spectrum utilization rate to a certain extent. Facing the high requirements for access transmission and high spectrum utilization rate in future multi-service scenarios, it is urgent to carry out the design and verification of wide and narrowband integrated access waveforms and systems. Summary of the Invention

[0005] The technical problem to be solved by the present invention is how to support different service requirements of wideband and narrowband simultaneously by dividing sub-bands on a carrier of OFDM, that is, to realize the fusion of wideband and narrowband waveforms in the frequency domain by using orthogonal frequency division multiplexing; on the other hand, a scheme for demodulating wideband signals based on FFT transformation and demodulating narrowband signals based on integral coherence demodulation of the sub-bands where they are located is proposed, which reduces the demodulation complexity of signals in different sub-bands, avoids interference between wideband and narrowband signals while improving the spectrum utilization rate, and simultaneously meets the access and transmission requirements of wideband and narrowband services. In view of this, the present invention provides a satellite wideband and narrowband fusion access and transmission method and device.

[0006] The technical solution adopted by the present invention is a satellite wideband and narrowband fusion access and transmission method, including:

[0007] Generating a waveform signal to be transmitted at the sending end, where the waveform signal to be transmitted includes a wideband waveform signal and n narrowband waveform signals corresponding to n narrowband users;

[0008] Based on N pre-configured sub-carriers, performing serial-to-parallel conversion on the serial wideband waveform signal to obtain N - n data streams, and allocating the n narrowband waveform signals and the N - n wideband waveform signals to the N sub-carriers;

[0009] Based on a preset algorithm, determining the output waveform at the sending end by using the wideband waveform signal and narrowband waveform signal of the current sub-carrier;

[0010] Receiving the output waveform at the receiving end, and using a pre-configured demodulation algorithm to restore the output waveform to the waveform signal to be transmitted.

[0011] In one embodiment, the determining the output waveform at the sending end by using the wideband waveform signal and narrowband waveform signal of the current sub-carrier based on a preset algorithm includes:

[0012] Performing orthogonal multi-carrier modulation on the N parallel data including the n narrowband waveform signals and the N - n wideband waveform signals to obtain an OFDM symbol;

[0013] Performing sampling processing on the OFDM symbol to obtain the output waveform.

[0014] In one embodiment, the receiving the output waveform at the receiving end and using a pre-configured demodulation algorithm to restore the output waveform to the waveform signal to be transmitted includes:

[0015] When the receiving end is the receiving end of a wideband user, performing FFT transformation on the output waveform to obtain the corresponding wideband waveform signal.

[0016] In one embodiment, receiving the output waveform at the receiving end and using a pre-configured demodulation algorithm to restore the output waveform to the waveform signal to be transmitted includes:

[0017] When the receiving end is the receiving end of a narrowband user, perform band-pass filtering on the output waveform;

[0018] Perform demodulation processing on the current output waveform.

[0019] Another aspect of the present invention further provides a satellite narrowband and broadband integrated access transmission device, including:

[0020] A generation module, configured to generate a waveform signal to be transmitted at the sending end, where the waveform signal to be transmitted includes a broadband waveform signal and n narrowband waveform signals respectively generated by n narrowband users;

[0021] An allocation module, configured to, based on N pre-configured subcarriers, perform serial-to-parallel conversion on the broadband waveform signal to obtain N - n data streams, and allocate the n narrowband waveform signals and the N - n broadband waveform signals to the N subcarriers;

[0022] An output module, configured to, based on a preset algorithm, use the broadband waveform signal and the narrowband waveform signal of the current subcarrier to determine the output waveform at the sending end;

[0023] A demodulation module, configured to receive the output waveform at the receiving end and use a pre-configured demodulation algorithm to restore the output waveform to the waveform signal to be transmitted.

[0024] In one embodiment, the output module is further configured to:

[0025] Perform orthogonal multi-carrier modulation on the N parallel data including the n narrowband waveform signals and the N - n broadband waveform signals to obtain OFDM symbols;

[0026] Perform sampling processing on the OFDM symbols to obtain the output waveform.

[0027] In one embodiment, the demodulation module is further configured to:

[0028] When the receiving end is the receiving end of a broadband user, perform FFT transformation on the output waveform to obtain the corresponding broadband waveform signal.

[0029] In one embodiment, the demodulation module is further configured to:

[0030] When the receiving end is the receiving end of a narrowband user, perform band-pass filtering on the output waveform;

[0031] Demodulate the current output waveform.

[0032] Another aspect of the present invention also provides an electronic device, which includes: a memory, a processor, and a computer program stored on the memory and executable on the processor. When the computer program is executed by the processor, it implements the steps of the satellite narrowband and broadband integrated access transmission method described in any one of the above.

[0033] Another aspect of the present invention also provides a computer storage medium, on which a computer program is stored. When the computer program is executed by a processor, it implements the steps of the satellite narrowband and broadband integrated access transmission method described in any one of the above.

[0034] Compared with the prior art, the present invention has at least the following advantages:

[0035] 1) The narrowband waveform signal and the broadband waveform signal do not require sub-band filtering processing and can perform IFFT transformation simultaneously. Different sub-carriers are completely orthogonal in the frequency domain, and the demodulation of narrowband and broadband users will not interfere with each other, and the frequency band utilization rate is high.

[0036] 2) Under different signal-to-noise ratios, the narrowband and broadband waveforms can still maintain the bit error rate performance of the original separate modulation, and the number of sub-carriers used by the narrowband and broadband waveforms can be flexibly configured according to the needs of different scenarios.

[0037] 3) Through the division of multiple sub-bands, the efficiency of the downlink of low-earth orbit satellites can be improved in the space-based Internet of Things scenario, and multi-user concurrent transmission can be realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a flowchart of the satellite narrowband and broadband integrated access transmission method according to an embodiment of the present invention;

[0039] Figure 2 It is a block diagram of the satellite narrowband and broadband integrated access transmission method according to an embodiment of the present invention;

[0040] Figure 3 It is a spectrum diagram of the narrowband and broadband integrated waveform at the transmitting end according to an embodiment of the present invention;

[0041] Figure 4 It is a structural diagram of the composition of the satellite narrowband and broadband integrated access transmission device according to an embodiment of the present invention;

[0042] Figure 5 It is a schematic diagram of an electronic device according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0043] To further elaborate on the technical means and effects adopted by the present invention to achieve the predetermined purpose, the present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments.

[0044] In the accompanying drawings, for ease of illustration, the thickness, dimensions, and shape of the objects have been slightly exaggerated. The accompanying drawings are only examples and are not drawn to an exact scale.

[0045] It should also be understood that the terms "comprising", "including", "having", "containing", and / or "including having", when used in this specification, denote the presence of the stated features, wholes, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or combinations thereof. In addition, when an expression such as "at least one of..." appears after a list of listed features, it modifies the entire list of listed features rather than individual elements in the list. In addition, when describing embodiments of the present application, the use of "may" means "one or more embodiments of the present application". And the term "exemplary" is intended to refer to an example or illustration.

[0046] As used herein, the terms "substantially", "about", and similar terms are used as terms indicating approximation and not as terms indicating degree, and are intended to account for the inherent deviations in measured or calculated values that would be recognized by a person of ordinary skill in the art.

[0047] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by a person of ordinary skill in the art to which this application belongs. It should also be understood that terms (such as those defined in a common dictionary) should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0048] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0049] In the description of the method flow in the specification of the present invention and the steps in the flowchart in the accompanying drawings of the specification of the present invention, it is not necessary to strictly execute the steps according to the step numbers. The execution order of the method steps can be changed. Moreover, certain steps may be omitted, multiple steps may be combined into one step for execution, and / or one step may be decomposed into multiple steps for execution.

[0050] In the first embodiment of the present invention, a satellite wideband and narrowband integrated access and transmission method, as Figure 1 shown, includes the following specific steps:

[0051] Step S1, generating a waveform signal to be transmitted at the sending end, where the waveform signal to be transmitted includes a wideband waveform signal and n narrowband waveform signals respectively generated by n narrowband users;

[0052] Step S2: Based on N preconfigured subcarriers, perform serial-to-parallel conversion on the serial broadband waveform signal to obtain N - n data streams, and allocate the n narrowband waveform signals and the N - n broadband waveform signals to the N subcarriers;

[0053] Step S3: Based on a preset algorithm, use the broadband waveform signal and the narrowband waveform signal of the current subcarrier to determine the output waveform at the transmitting end;

[0054] Step S4: At the receiving end, receive the output waveform, and use a preconfigured demodulation algorithm to restore the output waveform to the waveform signal to be transmitted.

[0055] Reference can be made to Figure 1 or Figure 2 , and the method provided by the present invention will be described in detail step by step below.

[0056] Step S1: Generate a waveform signal to be transmitted at the transmitting end, where the waveform signal to be transmitted includes a broadband waveform signal and n narrowband waveform signals respectively generated by n narrowband users.

[0057] In this embodiment, specifically, narrowband waveform signals can be generated at the transmitting end, and the narrowband waveform signals are obtained through corresponding encoding, modulation, and other processes. Assuming there are n users with narrowband service requirements, denoted as where represents the data waveform signal of the m-th narrowband user.

[0058] Correspondingly, a broadband waveform signal can be generated synchronously at the transmitting end, and the corresponding serial data stream x β (t) is obtained through corresponding scrambling, encoding, interleaving, mapping, and other processes.

[0059] Step S2: Based on N preconfigured subcarriers, perform serial-to-parallel conversion on the serial broadband waveform signal to obtain N - n data streams, and allocate the n narrowband waveform signals and the N - n broadband waveform signals to the N subcarriers.

[0060] In this embodiment, without considering the pilot subcarrier overhead and guard band, assuming there are N subcarriers, the n narrowband IoT users can be represented as The serial data stream x β (t) of the broadband user is converted from serial to parallel to obtain N - n data streams where represents the j-th broadband data stream. According to the actual narrowband and broadband service requirements, the n narrowband user data and the N - n broadband mapped data can be allocated to N different sub-band waves to obtain N parallel data streams d i , i ∈ 1, 2, 3…N; where di is the i-th path of data corresponding to the i-th subcarrier.

[0061] Step S3: Based on a preset algorithm, use the wideband waveform signal and the narrowband waveform signal of the current subcarrier to determine the output waveform of the transmitting end.

[0062] In this embodiment, based on a preset algorithm, using the wideband waveform signal and the narrowband waveform signal of the current subcarrier to determine the output waveform of the transmitting end includes:

[0063] Perform orthogonal multi-carrier modulation on N parallel data including n paths of narrowband waveform signals and N - n paths of wideband waveform signals to obtain an OFDM symbol; then perform sampling processing on the OFDM symbol to obtain the output time-domain waveform. The frequency-domain waveform can be referred to Figure 3

[0064] Exemplarily, N parallel data d including n paths of narrowband user data and N - n paths of wideband data i are subjected to orthogonal multi-carrier modulation to obtain an OFDM symbol. The following formula represents an OFDM symbol starting from t - t s where N represents the number of subcarriers, T represents the duration of the OFDM symbol, and the rectangular function is rect(t) = 1.

[0065]

[0066] Let t

[0067] = 0 in the above formula and ignore the rectangular function. Sample the signal s(t) at a rate of T / N, that is, let s to obtain It can be found that the above formula is in the same form as the expression of the IDFT operation. Generally, in practical applications, the more convenient and fast fast Fourier transform (FFT / IFFT) is usually used. Therefore, the above result can be expressed as s

[0068]

[0069] = IFFT[d k , and thus the data waveform of the transmitting end is obtained. i

[0070] Step S4: Receive the output waveform at the receiving end and use a pre-configured demodulation algorithm to restore the output waveform to the waveform signal to be transmitted.

[0071] In this embodiment, the receiving end receives the output waveform and uses a pre-configured demodulation algorithm to restore the output waveform to the waveform signal to be transmitted, including: when the receiving end is the receiving end of a broadband user, performing an FFT transformation on the output waveform to obtain the corresponding broadband waveform signal.

[0072] Specifically, at the receiving end, different narrowband and broadband terminals perform reception demodulation respectively according to design and requirements. For broadband users with a large bandwidth and no need to consider the problem of bandwidth limitation, the entire frequency-domain signal can be directly received to restore the original parallel data symbols d i can directly perform the inverse transformation on s k that is, DFT:

[0073]

[0074] Similarly, it can be expressed by the fast Fourier transform as By extracting the information on the corresponding N-n subcarriers carrying broadband data, demapping, deinterleaving, decoding, and descrambling can be performed to obtain the original bit data stream of the broadband user.

[0075] In this embodiment, the receiving end receives the output waveform and uses a pre-configured demodulation algorithm to restore the output waveform to the waveform signal to be transmitted, including: when the receiving end is the receiving end of a narrowband user, performing band-pass filtering on the output waveform; performing demodulation processing on the current output waveform.

[0076] Exemplarily, for a single terminal of a narrowband user with a small bandwidth and considering the problem of limited receiver bandwidth, the scheme uses a band-pass filter to filter out the frequency-domain signals of the subcarriers where different narrowband user signals are located, and uses the orthogonality of orthogonal frequency-division multiplexing (OFDM) to perform relevant demodulation on its corresponding subcarrier alone, avoiding the influence of broadband signals on other subcarriers on the demodulation of narrowband signals, and only the data on the subcarriers within the corresponding bandwidth needs to be obtained. The formula is as follows

[0077]

[0078] where h(t) is the time-domain representation form of the filter, and i represents the number of the subcarrier where chirp spread spectrum is located. represents the data after the relevant demodulation of the m-th narrowband user. Subsequently, demodulation, decoding, etc. of chirp spread spectrum can be performed to obtain the original bit stream data of the narrowband user.

[0079] The principle used is as follows:

[0080] Each subcarrier contains an integer number of cycles within one OFDM symbol period, and the adjacent subcarriers differ by one cycle. Therefore

[0081]

[0082] It can be obtained therefrom that if the j-th subcarrier of the OFDM signal is subjected to correlation demodulation and then integrated within a time length T, the following can be obtained

[0083]

[0084] As can be seen from the above, performing correlation demodulation on the j-th subcarrier can recover the desired signal d j . For other subcarriers, since the frequency difference within the integration interval is an integer multiple of the period, the integration result thereof is zero.

[0085] In summary, compared with the prior art, this embodiment has at least the following advantages:

[0086] 1) The narrowband waveform signal and the broadband waveform signal do not require sub-band filtering processing, and can perform IFFT transformation simultaneously. Different subcarriers are completely orthogonal in the frequency domain, and the demodulation of narrowband and broadband users will not interfere with each other, and the frequency band utilization rate is high.

[0087] 2) Under different signal-to-noise ratios, the narrowband and broadband waveforms can still maintain the bit error rate performance of the original separate modulation, and the number of subcarriers used by the narrowband and broadband waveforms can be flexibly configured according to the needs of different scenarios.

[0088] 3) Through the division of multiple sub-bands, the efficiency of the downlink of low-orbit satellites can be improved in the space-based Internet of Things scenario, and multi-user concurrent transmission can be realized.

[0089] The second embodiment of the present invention corresponds to the first embodiment. This embodiment provides a satellite narrowband and broadband fusion access transmission device for implementing the method provided in the first embodiment. As Figure 4 shown, the device may specifically include:

[0090] A generation module, configured to generate a waveform signal to be transmitted at the sending end, where the waveform signal to be transmitted includes a broadband waveform signal and n narrowband waveform signals respectively generated by n narrowband users;

[0091] An allocation module, configured to, based on N pre-configured subcarriers, perform serial-to-parallel conversion on the broadband waveform signal to obtain N-n data streams, and allocate the n narrowband waveform signals and the N-n broadband waveform signals to the N subcarriers;

[0092] An output module, configured to, based on a preset algorithm, use the broadband waveform signal and the narrowband waveform signal of the current subcarrier to determine the output waveform at the sending end;

[0093] A demodulation module, configured to receive the output waveform at the receiving end and use a pre-configured demodulation algorithm to restore the output waveform to the waveform signal to be transmitted.

[0094] In some embodiments, the output module is further configured to:

[0095] Perform orthogonal multicarrier modulation on N-channel parallel data including n-channel narrowband waveform signals and N - n-channel broadband waveform signals to obtain OFDM symbols;

[0096] Perform sampling processing on the OFDM symbols to obtain an output waveform.

[0097] In some embodiments, the demodulation module is further configured to:

[0098] When the receiving end is the receiving end of a broadband user, perform FFT transformation on the output waveform to obtain the corresponding broadband waveform signal.

[0099] In some embodiments, the demodulation module is further configured to:

[0100] When the receiving end is the receiving end of a narrowband user, perform band-pass filtering on the output waveform;

[0101] Perform demodulation processing on the current output waveform.

[0102] In the third embodiment of the present invention, this embodiment is an application example based on the above embodiments.

[0103] For the narrowband and broadband waveform fusion scheme, the relevant simulation results are shown in the attached drawings. Let the IFFT point number N = 64, the narrowband waveform selects chirp spread spectrum: the number of users is 8, the spreading factor is SF = 10, the slope K = 1, and a total of 8 subcarriers are occupied (subcarrier numbers are 5 - 8, 57 - 60); the broadband OFDM signal selects the modulation method of 16QAM, convolutional coding with a code rate of 2 / 3, and occupies 48 subcarriers (subcarrier numbers are 9 - 56); the remaining subcarriers are filled with 0. The specific implementation is as follows:

[0104] In this embodiment, the generation of the broadband signal: The original bit stream data undergoes scrambling, convolutional coding, interleaving, QAM mapping, and serial-to-parallel conversion to obtain 48-channel parallel data a j , j ∈ 1, 2, 3…48;

[0105] In this embodiment, for the narrowband chirp spread spectrum (CSS) signal, the modulation process is specifically as follows:

[0106] Let the bandwidth be B and the spreading factor be SF, then a CSS symbol consists of M = 2 SF chips, and the duration of one symbol is

[0107] At the transmitting end, the instantaneous frequency expression of the CSS modulation signal (up chirp) is:

[0108]

[0109] Among them, \(m\in[0,1,\cdots,M - 1]\), and \(u(t)\) is a step function. Based on the relationship between phase and frequency, the time-domain waveform of the CSS modulation signal is obtained as follows:

[0110]

[0111] In this embodiment, at the transmitting end, 8 narrowband users with linear frequency modulation are designed The broadband signal is mapped into 48 parallel signals which are jointly combined into a parallel frequency-domain signal:

[0112]

[0113] Perform an IFFT transformation on it to complete OFDM modulation to obtain a time-domain signal:

[0114] s k = IFFT[d i

[0115] In this embodiment, at the receiving end, different terminal users are received and demodulated respectively. For broadband users, there is no bandwidth limitation problem for the receiver, and the FFT transformation can be directly performed to restore the original frequency-domain signal:

[0116]

[0117] Among them, the information on the corresponding \(N - n\) subcarriers carrying broadband data is taken out to perform demapping, deinterleaving, decoding, and descrambling to obtain the original bit data stream.

[0118] In this embodiment, for the narrowband linear frequency modulation signal, since the bandwidth of its receiver is limited, first perform band-pass filtering on it to filter out the frequency-domain signal of the subcarrier where the signal is located. Each receiver performs correlation demodulation on the subcarrier where the received user is located without knowing the entire frequency-domain signal:

[0119]

[0120] Among them, \(h(t)\) is the time-domain representation of the band-pass filter, is the restored linear frequency modulation signal, and perform demodulation on :

[0121] Multiply the unmodulated down-chirped CSS signal by the modulated signal of the user to eliminate the quadratic term in the time-domain waveform of the user signal, that is:

[0122]

[0123] Perform a discrete Fourier transform of xx points on it, that is​

[0124]

[0125] The k corresponding to the maximum value in the above formula is the symbol information of the user. By decoding the obtained data, the original data stream can be restored.

[0126] In the fourth embodiment of the present invention, an electronic device, as Figure 5 shown, can be understood as an entity device, including a processor and a memory storing processor-executable instructions. When the instructions are executed by the processor, the following operations are performed:

[0127] Step S1, generate a waveform signal to be transmitted at the sending end. Among them, the waveform signal to be transmitted includes a broadband waveform signal and n narrowband waveform signals respectively generated by n narrowband users;

[0128] Step S2, based on N pre-configured subcarriers, perform serial-to-parallel conversion on the serial broadband waveform signal to obtain N - n data streams, and allocate the n narrowband waveform signals and the N - n broadband waveform signals to the N subcarriers;

[0129] Step S3, based on a preset algorithm, use the broadband waveform signal and the narrowband waveform signal of the current subcarrier to determine the output waveform at the sending end;

[0130] Step S4, receive the output waveform at the receiving end, and use a pre-configured demodulation algorithm to restore the output waveform to the waveform signal to be transmitted.

[0131] In the fourth embodiment of the present invention, the flow of the satellite wideband and narrowband integrated access transmission method provided in this embodiment is the same as that of the first, second, or third embodiment. The difference is that in engineering implementation, this embodiment can be implemented by means of software plus a necessary general hardware platform. Of course, it can also be implemented by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the method of the present invention can be embodied in the form of a computer software product. The computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disc), and includes several instructions for causing a device to execute the method described in the embodiments of the present invention.

[0132] Through the description of the specific implementation manners, it should be possible to understand more deeply and specifically the technical means and effects adopted by the present invention to achieve the predetermined purpose. However, the attached drawings are only for reference and illustration, and are not used to limit the present invention.

Claims

1. A satellite wide and narrow band integrated access and transmission method, characterized in that, including: generating a waveform signal to be transmitted at a transmitting end, where the waveform signal to be transmitted includes a broadband waveform signal and n narrowband waveform signals respectively generated by n narrowband users; based on N pre-configured subcarriers, performing serial-to-parallel conversion on the serial broadband waveform signal to obtain N - n data streams, and allocating the n narrowband waveform signals and the N - n broadband waveform signals to the N subcarriers; based on a preset algorithm, using the broadband waveform signal and the narrowband waveform signal of the current subcarrier to determine the output waveform at the transmitting end; receiving the output waveform at a receiving end, and using a pre-configured demodulation algorithm to restore the output waveform to the waveform signal to be transmitted; wherein, the determining the output waveform at the transmitting end based on a preset algorithm, using the broadband waveform signal and the narrowband waveform signal of the current subcarrier includes: performing orthogonal multi-carrier modulation on N parallel data including the n narrowband waveform signals and the N - n broadband waveform signals to obtain an OFDM symbol; performing sampling processing on the OFDM symbol to obtain the output waveform.

2. The satellite wide and narrow band integrated access and transmission method according to claim 1, characterized in that, The receiving the output waveform at the receiving end, and using a pre-configured demodulation algorithm to restore the output waveform to the waveform signal to be transmitted includes: when the receiving end is a receiving end of a broadband user, performing FFT transformation on the output waveform to obtain the corresponding broadband waveform signal.

3. The satellite wide and narrow band integrated access and transmission method according to claim 1, characterized in that, The receiving the output waveform at the receiving end, and using a pre-configured demodulation algorithm to restore the output waveform to the waveform signal to be transmitted includes: when the receiving end is a receiving end of a narrowband user, performing band-pass filtering on the output waveform; performing demodulation processing on the current output waveform.

4. A satellite wide and narrow band integrated access and transmission device, characterized in that, including: a generating module, configured to generate a waveform signal to be transmitted at a transmitting end, where the waveform signal to be transmitted includes a broadband waveform signal and n narrowband waveform signals respectively generated by n narrowband users; an allocating module, configured to, based on N pre-configured subcarriers, perform serial-to-parallel conversion on the broadband waveform signal to obtain N - n data streams, and allocate the n narrowband waveform signals and the N - n broadband waveform signals to the N subcarriers; an output module, configured to, based on a preset algorithm, use the broadband waveform signal and the narrowband waveform signal of the current subcarrier to determine the output waveform at the transmitting end; a demodulating module, configured to receive the output waveform at a receiving end, and use a pre-configured demodulation algorithm to restore the output waveform to the waveform signal to be transmitted; the output module is further configured to: perform orthogonal multi-carrier modulation on N parallel data including the n narrowband waveform signals and the N - n broadband waveform signals to obtain an OFDM symbol; perform sampling processing on the OFDM symbol to obtain the output waveform.

5. The satellite wide and narrow band integrated access and transmission device according to claim 4, characterized in that, the demodulating module is further configured to: when the receiving end is a receiving end of a broadband user, perform FFT transformation on the output waveform to obtain the corresponding broadband waveform signal.

6. The satellite wide and narrow band integrated access and transmission device according to claim 4, characterized in that, the demodulating module is further configured to: when the receiving end is a receiving end of a narrowband user, perform band-pass filtering on the output waveform; Demodulate the current output waveform.

7. An electronic device, characterized in that, The electronic device includes: a memory, a processor, and a computer program stored on the memory and executable on the processor. When the computer program is executed by the processor, it implements the steps of the satellite wideband and narrowband integrated access transmission method according to any one of claims 1 to 3.

8. A computer storage medium, characterized in that, A computer program is stored on the computer storage medium. When the computer program is executed by the processor, it implements the steps of the satellite wideband and narrowband integrated access transmission method according to any one of claims 1 to 3.

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