Low-variable-rate wireless communication system and method based on SC-FDE waveform

Abstract

The invention relates to a low-variable-rate wireless communication system and a low-variable-rate wireless communication method based on SC-FDE (Single Carrier Frequency Domain Exchange) waveform, which are characterized in that a transmitting link of the system is improved, so that the transmitting link of the system comprises a data segment modulation module and a framing module without a signaling segment modulation module, and a receiving link comprises a data segment demodulation module without a signaling segment demodulation module; a redundant signaling segment modulation / demodulation module in an overall framework is removed, so that the overall communication waveform utilization rate of the system is improved, and compared with the traditional technology, the frame length is shorter or the rate is higher.

Description

Technical Field

[0001] The present invention belongs to the technical field of wireless communication, and relates to a low variable rate wireless communication system and method based on SC-FDE waveform. Background Art

[0002] SC-FDE (Single Carrier-Frequency Domain Equalization) is a very effective method to combat multipath effects in wireless transmission. It effectively combines the advantages of single carrier technology and OFDM (Orthogonal Frequency Division Multiplexing) technology. That is, the single carrier frequency domain equalization system avoids the peak-to-average ratio problem introduced by the OFDM system, so the requirements for communication attack and defense are significantly reduced, and the transmission power consumption is reduced. Compared with the OFDM system, SC-FDE reduces the system's sensitivity to frequency offset; from the perspective of frequency selective fading, the SC-FDE system receiver uses channel estimation and equalization technology, and its performance is similar to that of the OFDM system, which makes up for the shortcomings of OFDM technology and becomes a competitive solution for high-speed wireless communication systems. However, the wireless communication system with the commonly used SC-FDE communication waveform has the technical problem of low communication waveform utilization in low-rate application scenarios with fixed service rates or few service rate changes. Summary of the invention

[0003] In response to the problems existing in the above-mentioned traditional methods, the present invention proposes a low-variable-rate wireless communication system based on the SC-FDE waveform and a low-variable-rate wireless communication method based on the SC-FDE waveform, which can improve the overall communication waveform utilization in low-variable-rate application scenarios.

[0004] In order to achieve the above objectives, the embodiments of the present invention adopt the following technical solutions:

[0005] On the one hand, a low variable rate wireless communication system based on an SC-FDE waveform is provided, including a transmitting end and a receiving end, the transmitting end including a data segment modulation module and a framing module, the input end of the data segment modulation module is used to access uplink service data, the output end of the data segment modulation module is connected to the input end of the framing module, the output end of the framing module is connected to a transmitting antenna, the receiving end includes a data segment demodulation module, the input end of the data segment demodulation module is connected to a receiving antenna through a receiving front end, and the output end of the data segment demodulation module is used to output downlink service data; there is no signaling segment data in the SC-FDE communication waveform frame structure of the low variable rate wireless communication system.

[0006] In one of the embodiments, the low variable rate wireless communication system transmits the control parameters of the next frame to the receiver one frame in advance; the control parameters of the next frame are used to instruct the receiver to automatically adjust the decoding code rate and modulation method when the next frame signal arrives, and parse the next frame signal according to the adjusted code rate and modulation method.

[0007] On the other hand, a low variable rate wireless communication method based on an SC-FDE waveform is also provided, which is applied to a low variable rate wireless communication system based on an SC-FDE waveform. The low variable rate wireless communication system includes a transmitting end and a receiving end. The transmitting end includes a data segment modulation module and a framing module. The input end of the data segment modulation module is used to access uplink service data. The output end of the data segment modulation module is connected to the input end of the framing module. The output end of the framing module is connected to a transmitting antenna. The receiving end includes a data segment demodulation module. The input end of the data segment demodulation module is connected to a receiving antenna through a receiving front end. The output end of the data segment demodulation module is used to output downlink service data. There is no signaling segment data in the SC-FDE communication waveform frame structure of the low variable rate wireless communication system.

[0008] The low variable rate wireless communication method based on the SC-FDE waveform comprises the following steps:

[0009] The low variable rate wireless communication method based on SC-FDE waveform comprises the following steps:

[0010] Performing initialization configuration of a low variable rate wireless communication system;

[0011] The data segment modulation module performs BPSK modulation at a code rate of 1 / 3 and then modulates the service data;

[0012] The framing module frames the data output after modulation by the data segment modulation module and sends the data to the transmitting antenna for transmission.

[0013] In one embodiment, the above-mentioned low variable rate wireless communication method based on SC-FDE waveform further includes the steps of:

[0014] If the low variable rate wireless communication system has not been initialized, determining whether a control parameter of the low variable rate wireless communication system has been changed;

[0015] If the control parameters of the low variable rate wireless communication system are not changed, the data segment modulation module performs service data modulation according to the current control parameters.

[0016] In one embodiment, the above-mentioned low variable rate wireless communication method based on SC-FDE waveform further includes the steps of:

[0017] If the control parameters of the low variable rate wireless communication system are changed, the data segment modulation module modulates the service data according to the changed control parameters, and then the framing module framing is performed.

[0018] In one of the embodiments, the low variable rate wireless communication system transmits the control parameters of the next frame to the receiver one frame in advance; the control parameters of the next frame are used to instruct the receiver to automatically adjust the decoding code rate and modulation method when the next frame signal arrives, and parse the next frame signal according to the adjusted code rate and modulation method.

[0019] One of the above technical solutions has the following advantages and beneficial effects:

[0020] The above-mentioned low variable rate wireless communication system and method based on SC-FDE waveform improves the system's transceiver links so that the system's sending link includes a data segment modulation module and a framing module, but no signaling segment modulation module, and the receiving link includes a data segment demodulation module but no signaling segment demodulation module, thereby removing redundant signaling segment modulation / demodulation modules in the overall framework, thereby improving the overall communication waveform utilization of the system, with a shorter frame length or higher rate compared to traditional technologies. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 It is a schematic diagram of the overall architecture of the transceiver link of the existing SC-FDE communication waveform;

[0023] Figure 2 It is a schematic diagram of the existing SC-FDE communication waveform frame structure;

[0024] Figure 3 It is a schematic diagram of the existing signal segment structure;

[0025] Figure 4 A schematic diagram of the overall architecture of a communication waveform transceiver link in a low variable rate wireless communication system based on an SC-FDE waveform in one embodiment;

[0026] Figure 5 A schematic diagram of an optimized SC-FDE communication waveform frame structure in one embodiment;

[0027] Figure 6 A schematic diagram of an optimized SC-FDE communication waveform transmission process in one embodiment;

[0028] Figure 7 Schematic diagram of a flow chart of a low variable rate wireless communication method based on an SC-FDE waveform in an embodiment. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with the accompanying drawings and Examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0030] It should be noted that the reference to "embodiment" in this article means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present invention. The presentation of this phrase at various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It will be appreciated by those skilled in the art that the embodiments described herein may be combined with other embodiments. The term "and / or" used in the specification of the present invention and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.

[0031] The following will describe the implementation of the present invention in detail with reference to the accompanying drawings in the embodiment diagram of the present invention.

[0032] The overall framework of the commonly used SC-FDE communication waveform's transceiver link, communication waveform frame structure, and signal segment structure are as follows: Figure 1 , Figure 2 and Figure 3 As shown by Figure 1 It can be seen that the transmission link framework of the existing SC-FDE communication waveform mainly includes three modules, namely the signaling segment modulation module, the data segment modulation module and the framing module, and the receiving link framework mainly includes the signaling segment demodulation module and the data segment demodulation module. The signaling segment modulation module mainly realizes the modulation of the control information of the communication waveform frame, such as the modulation mode, code rate and load length. The data segment modulation module is mainly used to modulate the service load. The framing module mainly performs the modulation of the signaling segment and the data segment according to the Figure 2 The frame format in the frame is used for framing operations to form a complete frame signal.

[0033] In the existing commonly used frame structure, a signal segment is required to carry the control information of the frame, otherwise the receiver will not be able to correctly parse the frame; at the same time, the signal segment is mapped using a fixed, low modulation order BPSK (Binary Phase Shift Keying) mapping method, which not only has low transmission efficiency but also low spectrum utilization.

[0034] The existing SC-FDE communication waveform framework can realize dynamic conversion of different rates. However, in some low-rate application scenarios where the service rate is fixed or the service rate changes little, such as voice communication application environment or remote control application environment, although the existing SC-FDE communication waveform framework can meet its needs, the signaling segment module in the overall framework appears to be redundant. In order to improve the overall communication waveform utilization, that is, under the condition of satisfying the same service information throughput rate or satisfying the same frame length, the present invention designs an SC-FDE communication waveform with a shorter frame length or a higher rate and a corresponding transmission system.

[0035] In one embodiment, Figure 4 As shown, a low variable rate wireless communication system based on an SC-FDE waveform is provided, including a transmitting end and a receiving end, the transmitting end includes a data segment modulation module and a framing module, the input end of the data segment modulation module is used to access uplink business data, the output end of the data segment modulation module is connected to the input end of the framing module, the output end of the framing module is connected to a transmitting antenna, the receiving end includes a data segment demodulation module, the input end of the data segment demodulation module is connected to a receiving antenna through a receiving front end, and the output end of the data segment demodulation module is used to output downlink business data; there is no signaling segment data in the SC-FDE communication waveform frame structure of the low variable rate wireless communication system.

[0036] It can be understood that in the system of this embodiment, Figure 4 It can be seen that in the transceiver link framework structure of the SC-FDE communication waveform designed in this embodiment, the transmitting end mainly includes two modules: the data segment modulation module and the framing module. Correspondingly, the receiving end mainly includes a data segment demodulation module, which is used to perform the opposite demodulation processing on the received data as the data segment modulation module. The data segment modulation module mainly modulates the service load, and the framing module mainly performs the demodulation of the modulated data segment according to the Figure 5 The frame format in the frame is used for framing operations to form a complete frame signal.

[0037] The above-mentioned low variable rate wireless communication system based on SC-FDE waveform improves the system's transceiver links so that the system's sending link includes a data segment modulation module and a framing module, but no signaling segment modulation module, and the receiving link includes a data segment demodulation module, but no signaling segment demodulation module, thereby removing the redundant signaling segment modulation / demodulation modules in the overall framework, thereby improving the overall communication waveform utilization of the system, with a shorter frame length or higher rate than in traditional technologies.

[0038] Compared with traditional technologies, a communication waveform with shorter frame length or higher rate is designed to improve service communication efficiency. Under the conditions of the same service data volume and modulation method, the proposed SC-FDE communication waveform increases the communication rate by 20.9% in low variable rate application scenarios.

[0039] In one embodiment, a low variable rate wireless communication system transmits control parameters of the next frame to a receiver one frame in advance; the control parameters of the next frame are used to instruct the receiver to automatically adjust the decoding bit rate and modulation method when the next frame signal arrives, and parse the next frame signal according to the adjusted bit rate and modulation method.

[0040] It can be understood that in order to achieve adjustable communication rate, the design will transmit the modulation mode, code rate and other control parameter information of the next frame as service information to the receiver one frame in advance. After the receiver parses these control information, the next frame will automatically adjust the decoding code rate and modulation mode, and then correctly parse the next frame signal. The workflow can be as follows: Figure 6 As shown:

[0041] First, the system is initialized and configured. After the data segment modulation module performs BPSK modulation at a 1 / 3 code rate, it performs service data modulation, and then performs framing before sending. If the initialization configuration is not performed, determine whether the system control parameters have changed, such as whether the modulation mode, code rate, and load length parameters have changed. If there is no change, the data segment modulation module performs service data modulation normally. If there is a change, the data segment modulation module performs service data modulation according to the changed control parameters, and then the framing module performs framing.

[0042] Among them, BPSK (Binary Phase Shift Keying) is a phase shift keying modulation technology that transmits information by converting binary data into phase changes. In BPSK, 0 bits are mapped to 0 phase, and 1 bit is mapped to 180 phase. This modulation method uses a reference sine wave and a phase-reversed wave to make one side 0 and the other side 1, so that 2-value (1 bit) information can be transmitted simultaneously. The principle of BPSK modulation is based on phase changes. When the input binary signal is 0, the carrier signal maintains the original phase; when the binary signal is 1, the phase of the carrier signal is reversed 180 degrees. This phase change represents different data values. At the receiving end, the original binary data can be restored by demodulating the received signal.

[0043] It should be noted that the internal specific structural composition of each module in the transmitting end and the receiving end of the low variable rate wireless communication system based on the SC-FDE waveform, as well as other existing components in the transceiver link such as the transmitting / receiving antenna, can be understood by referring to the same components in the existing SC-FDE communication waveform framework in the field, and will not be elaborated in this specification.

[0044] In one embodiment, Figure 7 As shown, a low variable rate wireless communication method based on SC-FDE waveform is provided, which is applied to a low variable rate wireless communication system based on SC-FDE waveform. The low variable rate wireless communication system includes a transmitting end and a receiving end. The transmitting end includes a data segment modulation module and a framing module. The input end of the data segment modulation module is used to access uplink service data. The output end of the data segment modulation module is connected to the input end of the framing module. The output end of the framing module is connected to the transmitting antenna. The receiving end includes a data segment demodulation module. The input end of the data segment demodulation module is connected to the receiving antenna through the receiving front end. The output end of the data segment demodulation module is used to output downlink service data. There is no signaling segment data in the SC-FDE communication waveform frame structure of the low variable rate wireless communication system.

[0045] The low variable rate wireless communication method based on the SC-FDE waveform may include the following processing steps S10 to S14:

[0046] The low variable rate wireless communication method based on SC-FDE waveform comprises the following steps:

[0047] S10, performing initialization configuration of the low variable rate wireless communication system;

[0048] S12, the data segment modulation module performs BPSK modulation at a code rate of 1 / 3 and then performs service data modulation;

[0049] S14, the framing module frames the data output after modulation by the data segment modulation module and sends the data to the transmitting antenna for transmission.

[0050] The above-mentioned low-variable-rate wireless communication method based on the SC-FDE waveform improves the system's transceiver links so that the system's transmitting link includes a data segment modulation module and a framing module, but no signaling segment modulation module, and the receiving link includes a data segment demodulation module, but no signaling segment demodulation module, thereby removing the redundant signaling segment modulation / demodulation modules in the overall framework, thereby improving the overall communication waveform utilization of the system, with a shorter frame length or higher rate than in traditional technologies.

[0051] Compared with traditional technologies, a communication waveform with shorter frame length or higher rate is designed to improve service communication efficiency. Under the conditions of the same service data volume and modulation method, the proposed SC-FDE communication waveform increases the communication rate by 20.9% in low variable rate application scenarios.

[0052] In one embodiment, the above-mentioned low variable rate wireless communication method based on SC-FDE waveform may further include the steps of:

[0053] If the low variable rate wireless communication system has not been initialized, it is determined whether the control parameters of the low variable rate wireless communication system have changed; if the control parameters of the low variable rate wireless communication system have not changed, the data segment modulation module performs service data modulation according to the current control parameters.

[0054] It can be understood that during the operation of the system, if the low-variable-rate wireless communication system based on the SC-FDE waveform has not been initialized, this means that the control parameter configuration in its transceiver link has not been changed. At this time, in order to ensure that the subsequent data transmission service can be executed normally, it is necessary to first determine whether the system control parameters have changed. For example, it can be confirmed through system self-test or manual query. If the system control parameters have not changed, it means that the current control parameters can continue to be used for service data modulation, and it can also ensure that the receiver can correctly parse the next received frame signal.

[0055] In one embodiment, the above-mentioned low variable rate wireless communication method based on SC-FDE waveform may further include the steps of:

[0056] If the control parameters of the low variable rate wireless communication system are changed, the data segment modulation module modulates the service data according to the changed control parameters, and then the framing module framing is performed.

[0057] It is understandable that if the system control parameters change, it means that the current control parameters can no longer be used for business data modulation, and the system control parameters need to be updated to the latest to ensure that the receiver can correctly parse the next received frame signal.

[0058] In one embodiment, a low variable rate wireless communication system transmits control parameters of the next frame to a receiver one frame in advance; the control parameters of the next frame are used to instruct the receiver to automatically adjust the decoding bit rate and modulation method when the next frame signal arrives, and parse the next frame signal according to the adjusted bit rate and modulation method.

[0059] It can be understood that by transmitting the modulation mode, bit rate and other control parameter information of the next frame as business information to the receiver one frame in advance, after the receiver parses these control information, the next frame will automatically adjust the decoding bit rate and modulation mode, and then correctly parse the next frame signal, thereby realizing the adjustable communication rate of the system.

[0060] It can be understood that for the specific limitations of the low variable rate wireless communication method based on the SC-FDE waveform, please refer to the corresponding limitations of the low variable rate wireless communication system based on the SC-FDE waveform above, which will not be repeated here.

[0061] It should be understood that although Figure 7 The steps in the method are shown in sequence as indicated by the arrows, but the steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified in this document, there is no strict order restriction for the execution of the steps, and the steps can be executed in other orders. Figure 7 At least part of the steps may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequentially, but can be executed in turn or alternately with other steps or at least part of the sub-steps or stages of other steps.

[0062] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided by the present invention can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus dynamic random access memory (RambusDRAM, referred to as RDRAM) and interface dynamic random access memory (DRDRAM).

[0063] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0064] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of protection of the invention. It should be pointed out that, for those of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the attached claims.

Claims

1. A low variable rate wireless communication system based on SC-FDE waveform, It is characterized in that It includes a transmitting end and a receiving end, the transmitting end includes a data segment modulation module and a framing module, the input end of the data segment modulation module is used to access uplink business data, the output end of the data segment modulation module is connected to the input end of the framing module, the output end of the framing module is connected to a transmitting antenna, the receiving end includes a data segment demodulation module, the input end of the data segment demodulation module is connected to a receiving antenna through a receiving front end, and the output end of the data segment demodulation module is used to output downlink business data; the SC-FDE communication waveform frame structure of the low variable rate wireless communication system does not contain signaling segment data.

2. The low variable rate wireless communication system based on SC-FDE waveform according to claim 1, It is characterized in that The low variable rate wireless communication system transmits the control parameters of the next frame to the receiver one frame in advance; the control parameters of the next frame are used to instruct the receiver to automatically adjust the decoding code rate and modulation method when the next frame signal arrives, and parse the next frame signal according to the adjusted code rate and modulation method.

3. A low variable rate wireless communication method based on SC-FDE waveform, It is characterized in that Applied to a low variable rate wireless communication system based on SC-FDE waveform, the low variable rate wireless communication system includes a transmitting end and a receiving end, the transmitting end includes a data segment modulation module and a framing module, the input end of the data segment modulation module is used to access uplink service data, the output end of the data segment modulation module is connected to the input end of the framing module, the output end of the framing module is connected to a transmitting antenna, the receiving end includes a data segment demodulation module, the input end of the data segment demodulation module is connected to a receiving antenna through a receiving front end, the output end of the data segment demodulation module is used to output downlink service data, and the SC-FDE communication waveform frame structure of the low variable rate wireless communication system does not contain signaling segment data; The low variable rate wireless communication method based on the SC-FDE waveform comprises the steps of: Performing initialization configuration of the low variable rate wireless communication system; The data segment modulation module performs BPSK modulation at a code rate of 1 / 3 and then performs service data modulation; The framing module frames the data output after modulation by the data segment modulation module and sends the data to the transmitting antenna for transmission.

4. The low variable rate wireless communication method based on SC-FDE waveform according to claim 3, It is characterized in that Also includes the steps: If the low variable rate wireless communication system has not been initialized, determining whether a control parameter of the low variable rate wireless communication system has been changed; If the control parameters of the low variable rate wireless communication system are not changed, the data segment modulation module performs service data modulation according to the current control parameters.

5. The low variable rate wireless communication method based on SC-FDE waveform according to claim 4, It is characterized in that Also includes the steps: If the control parameters of the low variable rate wireless communication system are changed, the data segment modulation module modulates the service data according to the changed control parameters, and then the framing module performs framing.

6. The low variable rate wireless communication method based on SC-FDE waveform according to any one of claims 3 to 5, It is characterized in that The low variable rate wireless communication system transmits the control parameters of the next frame to the receiver one frame in advance; the control parameters of the next frame are used to instruct the receiver to automatically adjust the decoding code rate and modulation method when the next frame signal arrives, and parse the next frame signal according to the adjusted code rate and modulation method.

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