A bandwidth-independent positioning signal transmission method

Abstract

This invention belongs to the field of positioning technology, specifically relating to a bandwidth-independent positioning signal transmission method. The invention includes the following steps: S1, generating a bandwidth-independent positioning signal; S2, constructing a resource grid using the subcarriers and transmission symbols of the positioning signal; S3, mapping the positioning signal to the resource grid and transmitting the positioning signal. This invention avoids resource contention between different positioning signals, thus promoting stable operation of the positioning system. Furthermore, when transmitting the positioning signal, this invention first maps the positioning signal to the resource grid before transmitting it. This allows the invention to flexibly utilize the resource grid according to actual conditions during positioning signal transmission, improving work efficiency; and it can also expand time-domain and frequency-domain resources through the resource grid as needed, thereby improving the coverage or detection accuracy of the positioning signal.

Description

Technical Field

[0001] This invention belongs to the field of positioning technology, and specifically relates to a positioning signal transmission method with independent bandwidth. Background Technology

[0002] In many public services, the demand for high-precision indoor positioning is rapidly increasing, and the need for positioning technology with centimeter-level accuracy is also growing. In different scenarios, communication and positioning have different service requirements, and their respective service qualities also vary.

[0003] In some positioning systems with limited frequency domain resources or unlicensed frequency bands, when the user's positioning demand is large, various complex positioning signals will appear, which will cause resource contention between different positioning signals, thus affecting the use of the entire system. Summary of the Invention

[0004] The purpose of this invention is to address the problem in positioning systems with limited frequency domain resources or unlicensed frequency bands where various complex positioning signals can emerge when the user's positioning demand is high, leading to resource contention between different positioning signals and affecting the overall system operation. This invention provides a bandwidth-independent positioning signal transmission method.

[0005] A bandwidth-independent positioning signal transmission method includes the following steps:

[0006] S1 generates a bandwidth-independent positioning signal;

[0007] S2, using the subcarriers and transmission symbols of the positioning signal to construct a resource grid;

[0008] S3, map the location signal to the resource grid and send the location signal.

[0009] Furthermore, the positioning signal is generated based on a random QPSK sequence, and its generation formula is as follows:

[0010]

[0011] Where m is the index of sequence r, m = 1, 2, ...; c(2m) represents the element with index 2m in random sequence c; c(2m+1) represents the element with index 2m+1 in random sequence c; j is the imaginary part of each element in sequence r.

[0012] Furthermore, each positioning signal has an independent bandwidth corresponding to a single carrier, and each single carrier's bandwidth includes 39 consecutive subcarriers, one of which is a DC subcarrier.

[0013] Furthermore, when generating bandwidth-independent positioning signals, the reference frequency for physical layer signal transmission is f. s =30.72MHz, the duration of an infinite transmission frame is T f =640×T s ,in And the number of transmission symbols in each infinite transmission frame

[0014] Furthermore, in step S3, the positioning signal is a single symbol and a single carrier, and the resource grid is composed of a single transmission symbol and a single carrier. The generated positioning signal is directly mapped to the resource grid and transmitted through the resource grid.

[0015] Furthermore, in step S3, the positioning signal is a multi-symbol, single-carrier signal, and the resource grid is composed of a single transmission symbol and a single carrier. The positioning signal is repeatedly mapped into multiple transmission symbols in the resource grid and transmitted through the resource grid.

[0016] Furthermore, in step S3, the positioning signal is a multi-symbol, single-carrier signal. Each transmission symbol of the positioning signal forms a basic resource grid with the single carrier, and all basic grids together form a total resource grid. The positioning signal is divided equally according to the number of transmission symbols, and each segment of the positioning signal sequence is mapped to a basic resource grid with a corresponding transmission symbol in turn. The positioning signal is then transmitted through the total resource grid.

[0017] Furthermore, in step S3, the positioning signal is a single symbol and multiple carriers, and the resource grid is composed of a single transmission symbol and a single carrier. The positioning signal is mapped to a single transmission symbol and carriers of different frequencies in the resource grid, and the positioning signal is transmitted by frequency hopping through the resource grid.

[0018] Furthermore, in step S3, the positioning signal is a single symbol with multiple carriers. The single carriers of different frequency points of the positioning signal form a basic resource grid with the transmission symbol, and all basic grids together form a total resource grid. The positioning signal is divided equally according to the number of carriers at different frequency points, and each segment of the positioning signal sequence is mapped to a basic resource grid with the corresponding number of carriers at the frequency points in turn. The positioning signal is then transmitted by frequency hopping through the total resource grid.

[0019] Furthermore, in step S3, the positioning signal is multi-symbol, multi-carrier. Each transmission symbol of the positioning signal forms a basic resource grid with a single carrier at a different frequency, and all basic grids together form a total resource grid. The positioning signal is divided into equal segments according to the number of carriers at different frequency points, and the equally divided positioning signal sequence is mapped to the basic resource grid with the corresponding number of carriers at different frequency points in sequence. The positioning signal is then transmitted by frequency hopping through the total resource grid.

[0020] The beneficial effects of this invention are as follows:

[0021] The bandwidth-independent positioning signal transmission method (hereinafter referred to as "this method") provided by this invention transmits bandwidth-independent positioning signals. Bandwidth independence means that the bandwidth of the connected device is not preempted by other devices, i.e., the minimum bandwidth of the connected device. Therefore, when transmitting positioning signals, this method can avoid resource contention between different positioning signals. Compared with existing complex transmission methods, this method is beneficial to the stable operation of the positioning system.

[0022] Meanwhile, when transmitting positioning signals, the positioning signals are first mapped to a resource grid before being sent. This allows the method to flexibly utilize the resource grid according to actual conditions when transmitting positioning signals, thereby improving work efficiency; and it also allows for the expansion of frequency domain resources through the resource grid, thereby improving the coverage or detection accuracy of the positioning signals. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the physical layer transmission structure of the positioning signal in this embodiment.

[0024] Figure 2 This is a schematic diagram of the resource grid in a single transmission symbol and single carrier transmission mode.

[0025] Figure 3 This is a schematic diagram of the resource grid in a single-carrier repetitive transmission mode that uses multiple consecutive transmission symbols.

[0026] Figure 4 This is a schematic diagram of the resource grid in a single-carrier segmented transmission method that uses multiple consecutive transmission symbols.

[0027] Figure 5 This is a schematic diagram of the resource grid in a continuous multi-carrier frequency hopping repetitive transmission mode using a single transmission symbol.

[0028] Figure 6 This is a schematic diagram of the resource grid in a continuous multi-carrier frequency hopping segmented transmission method using a single transmission symbol. Detailed Implementation

[0029] The present invention will be further described in detail below with reference to experimental examples and specific embodiments. However, this should not be construed as limiting the scope of the above-mentioned subject matter of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0030] In positioning systems with limited frequency domain resources or unlicensed frequency bands, when the user's positioning demand is large, various complex positioning signals may appear, which can easily lead to resource contention between different positioning signals, thus affecting the use of the entire system. This embodiment provides a bandwidth-independent positioning signal transmission method that can ensure the effective transmission of positioning signals from each user terminal.

[0031] This embodiment specifically includes the following steps:

[0032] S1 generates a bandwidth-independent positioning signal;

[0033] In this embodiment, the bandwidth-independent positioning signal is generated based on a random QPSK sequence, and the specific generation formula is as follows:

[0034]

[0035] Where m is the index of sequence r, m = 1, 2, ...; c(2m) represents the element with index 2m in random sequence c; c(2m+1) represents the element with index 2m+1 in random sequence c; j is the imaginary part of each element in sequence r.

[0036] In this embodiment, bandwidth independence means that the bandwidth of the connected device is not preempted by other devices, that is, the minimum bandwidth of the connected device.

[0037] S2, using the subcarriers and transmission symbols of the positioning signal to construct a resource grid;

[0038] The minimum bandwidth corresponds to one carrier, also known as a single carrier; that is, in this embodiment, the independent bandwidth of the positioning signal corresponds to one single carrier. In this embodiment, the bandwidth of each single carrier includes 39 consecutive subcarriers, one of which is a DC subcarrier.

[0039] In this embodiment, the signal within a single carrier is defined as a narrowband signal, that is, the positioning signal in this embodiment is a narrowband signal.

[0040] When generating bandwidth-independent positioning signals, the reference frequency for physical layer signal transmission can be set to f. s =30.72MHz, the duration of an infinite transmission frame can be set to T f =640×T s ,in Furthermore, in this embodiment, the transmission symbols of each infinite transmission frame...

[0041] In this embodiment, the resource grid refers to: in each infinite transmission frame of each carrier, there are 39 subcarriers and A resource grid consisting of transmission symbols.

[0042] S3 maps the location signal to the resource grid and sends the location signal.

[0043] This embodiment maps the positioning signal to the resource grid through channel transmission. The channel transmission in this embodiment includes single-carrier transmission, continuous multi-carrier transmission, and multiple single-carrier frequency hopping transmission, wherein the number of carriers is N.

[0044] Specifically, the number of carriers N can be {2, 3, 4, 5, 6, 8, 10, 16, 20}, and the number of carriers N{2, 3, 4, 5, 6, 8, 10, 16, 20} corresponds to {40MHz, 60MHz, 80MHz, 100MHz, 120MHz, 160MHz, 200MHz, 320MHz} respectively.

[0045] When this embodiment uses multi-carrier continuous transmission, after generating the positioning signal, it is then wirelessly transmitted after undergoing time-frequency domain transformation.

[0046] When this embodiment uses single-carrier frequency hopping transmission, each transmission occupies only one single carrier, and the frequency of the single carrier can be different for each transmission.

[0047] The bandwidth-independent positioning signal transmission method provided in this embodiment transmits bandwidth-independent positioning signals. Bandwidth independence means that the bandwidth of the connected device is not preempted by other devices, i.e., the minimum bandwidth of the connected device. Therefore, when transmitting positioning signals, the bandwidth-independent positioning signal transmission method provided in this embodiment can avoid resource preemption between different positioning signals. Compared with existing complex transmission methods, the bandwidth-independent positioning signal transmission method provided in this embodiment is beneficial to the stable operation of the positioning system.

[0048] Meanwhile, when transmitting positioning signals, the positioning signals are first mapped to a resource grid before being sent. This allows the bandwidth-independent positioning signal transmission method provided in this embodiment to flexibly utilize the resource grid according to actual conditions, thereby improving work efficiency; and it also allows for the expansion of time-domain and frequency-domain resources through the resource grid, thereby improving the coverage or detection accuracy of the positioning signals.

[0049] Specifically, in this embodiment, the mapping and transmission of positioning signals include the following methods:

[0050] The generated positioning signal is mapped onto a resource grid consisting of a single transmission symbol and a single carrier. For example... Figure 1 As shown, during the transmission of the positioning signal at the physical layer, a carrier in the frequency domain consists of 39 consecutive subcarriers, numbered sequentially as #0, #1, ..., #38. Among these 39 subcarriers, one is a DC subcarrier. Figure 1 The resource grid, consisting of 38 subcarriers and 2 transmission symbols, is shown.

[0051] Using a single transmission symbol and single carrier transmission method:

[0052] like Figure 2 As shown, the positioning signal uses a single transmission symbol and a single carrier transmission method. The time domain length is 8 symbols, and any symbol at any position can be selected as the transmission symbol bit. Single carrier transmission occupies the entire carrier resource, that is, 39 subcarriers.

[0053] By using a single transmission symbol and a single carrier transmission method, resource contention between different positioning signals can be avoided. Compared with the existing complex transmission signals, using a single transmission symbol and a single carrier transmission method is beneficial to the stable operation of the positioning system.

[0054] A single-carrier repetitive transmission method using multiple consecutive transmission symbols is employed.

[0055] Based on the number of resource grids formed by a single transmission symbol and a single carrier, the positioning signal is repeatedly mapped within multiple transmission symbols, with the mapped sequence being the same in each resource grid. For example... Figure 3 As shown, the positioning signal uses a single transmission symbol and a single carrier transmission method, with a time domain length of 8 transmission symbols. The transmission symbol at any one of the positions is arbitrarily selected as the transmitted symbol bit.

[0056] By employing a single-carrier repetitive transmission method with multiple consecutive transmission symbols, time-domain resources can be expanded, work efficiency can be improved, and the coverage and detection accuracy of positioning signals can be enhanced.

[0057] Single-carrier segmented transmission method using multiple consecutive transmission symbols:

[0058] Each transmission symbol of the positioning signal forms a basic resource grid with a single carrier, and all basic grids together form the total resource grid. The positioning signal is divided equally according to the number of transmission symbols, and each segment of the positioning signal sequence is sequentially mapped to a basic resource grid with a corresponding transmission symbol. For example... Figure 4 As shown, the positioning signal uses a single-carrier segmented transmission method with multiple consecutive transmission symbols. Figure 3In the view shown, the number of carriers is 1, the number of transmission symbols is 2, the total number of resource grids generated is 38, and the positioning signal is repeatedly transmitted on two transmission symbols.

[0059] By employing a single-carrier segmented transmission method with multiple consecutive transmission symbols, time-domain resources can be expanded, work efficiency can be improved, and the coverage and detection accuracy of positioning signals can be enhanced.

[0060] The method employs continuous multi-carrier frequency hopping repetitive transmission with a single transmission symbol:

[0061] Based on the number of resource grids formed by a single transmission symbol and a single carrier, the positioning signal is mapped to a single transmission symbol and carriers of different frequencies within that resource grid. In this embodiment, the specific carrier frequency can be adaptively selected according to the application scenario. Figure 5 As shown, the positioning signal uses a continuous multi-carrier frequency hopping repetitive transmission method with a single transmission symbol. Figure 5 In the view shown, the number of carriers is 1, the number of transmitted symbols is 2, and the total number of resource grids generated is 76. The first part of the positioning signal occupies resource grids 1-38, and the second part of the positioning signal occupies resource grids 39-76.

[0062] By employing a continuous multi-carrier frequency hopping repetitive transmission method with a single transmission symbol, it is possible to broaden frequency domain resources, improve work efficiency, and enhance the coverage and detection accuracy of positioning signals.

[0063] A continuous multi-carrier frequency hopping segmented transmission method using a single transmission symbol:

[0064] Each carrier at a different frequency of the positioning signal forms a basic resource grid with the transmission symbols, and all basic grids together form the total resource grid. The positioning signal is divided equally according to the number of carriers at different frequencies, and each segment of the positioning signal sequence is sequentially mapped to a basic resource grid with the corresponding number of carriers at that frequency. In this embodiment, the specific carrier frequency can be adaptively selected according to the application scenario. Figure 6 As shown, the positioning signal uses a continuous multi-carrier frequency hopping segmented transmission method with a single transmission symbol. Figure 6 In the view shown, the number of carriers for the positioning signal is 2, the number of transmission symbols is 1, the total number of resource grids generated is 38, and the two carrier frequency bands are transmitted with one transmission symbol frequency hopping.

[0065] By employing a continuous multi-carrier frequency hopping segmented transmission method with a single transmission symbol, it is possible to broaden frequency domain resources, improve work efficiency, and enhance the coverage and detection accuracy of positioning signals.

[0066] A continuous multi-carrier frequency hopping segmented transmission method using multiple transmission symbols:

[0067] A positioning signal of corresponding length is generated based on the number of resource grids formed by multiple transmission symbols and the total number of carriers. The positioning signal is then divided into equal segments according to the number of carriers, and the segmented positioning signal is sequentially mapped to the resource grids formed by each transmission symbol and a single carrier at a different frequency point for frequency hopping transmission. In this embodiment, the specific carrier frequency can be adaptively selected according to the application scenario. The positioning signal adopts a continuous multi-carrier frequency hopping segmented transmission method with multiple transmission symbols. Specifically, for example, the number of carriers in the positioning signal is 2, the number of transmission symbols is 1, and the total number of resource grids generated is 76. The first part of the positioning signal occupies resource grids 1-38, and the second part of the positioning signal occupies resource grids 39-76.

[0068] By employing a continuous multi-carrier frequency hopping segmented transmission method with multiple transmission symbols, it is possible to broaden time-domain and frequency-domain resources, improve work efficiency, and enhance the coverage and detection accuracy of positioning signals.

[0069] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A bandwidth-independent positioning signal transmission method, characterized in that: Includes the following steps, S1, Generate a positioning signal with independent bandwidth. Here, independent bandwidth means that the bandwidth of the connected device is not preempted by other devices, which is the minimum bandwidth of the connected device. The independent bandwidth of each positioning signal corresponds to a single carrier, and the bandwidth of each single carrier includes 39 consecutive subcarriers, one of which is a DC subcarrier. S2, using the subcarriers and transmission symbols of the positioning signal to construct a resource grid; S3, map the location signal to the resource grid, and send the location signal using one of the following transmission methods: Single transmission symbol and single carrier transmission mode; Continuous multi-carrier frequency hopping repetitive transmission mode for a single transmission symbol; Continuous multi-carrier frequency hopping segmented transmission mode for a single transmission symbol; Single-carrier repetitive transmission mode for multiple consecutive transmission symbols; Single-carrier segmented transmission mode for multiple consecutive transmission symbols; Continuous multi-carrier frequency hopping segmented transmission of multiple transmission symbols; The positioning signal is generated based on a random QPSK sequence, and its generation formula is as follows: in, The index of sequence r, ; This represents the element with index 2m in the random sequence c; This represents the element with index 2m+1 in the random sequence c; Let be the imaginary part of each element in sequence r.

2. The bandwidth-independent positioning signal transmission method according to claim 1, characterized in that: When generating bandwidth-independent positioning signals, the reference frequency for physical layer signal transmission is: The duration of an infinite transmission frame is ,in And the number of transmission symbols in each infinite transmission frame .

3. The bandwidth-independent positioning signal transmission method according to claim 2, characterized in that: In step S3, the positioning signal is a single symbol and a single carrier. The resource grid is composed of a single transmission symbol and a single carrier. The generated positioning signal is directly mapped to the resource grid and transmitted through the resource grid.

4. The bandwidth-independent positioning signal transmission method according to claim 2, characterized in that: In step S3, the positioning signal is a multi-symbol, single-carrier signal, and the resource grid is composed of a single transmission symbol and a single carrier. The positioning signal is repeatedly mapped into multiple transmission symbols in the resource grid and transmitted through the resource grid.

5. The bandwidth-independent positioning signal transmission method according to claim 2, characterized in that: In step S3, the positioning signal is a multi-symbol, single-carrier signal. Each transmission symbol of the positioning signal forms a basic resource grid with the single carrier, and all basic grids together form a total resource grid. The positioning signal is divided equally according to the number of transmission symbols, and each segment of the positioning signal sequence is mapped to a basic resource grid with a corresponding transmission symbol in turn. The positioning signal is then transmitted through the total resource grid.

6. The bandwidth-independent positioning signal transmission method according to claim 2, characterized in that: In step S3, the positioning signal is a single symbol and multiple carriers. The resource grid is composed of a single transmission symbol and a single carrier. The positioning signal is mapped to a single transmission symbol and carriers of different frequencies in the resource grid, and the positioning signal is transmitted by frequency hopping through the resource grid.

7. The bandwidth-independent positioning signal transmission method according to claim 2, characterized in that: In step S3, the positioning signal is a single symbol with multiple carriers. The single carriers of different frequency points of the positioning signal form a basic resource grid with the transmission symbol, and all basic grids together form a total resource grid. The positioning signal is divided equally according to the number of carriers at different frequency points, and each segment of the positioning signal sequence is mapped to a basic resource grid with the corresponding number of carriers at the frequency point in turn. The positioning signal is then transmitted by frequency hopping through the total resource grid.

8. The bandwidth-independent positioning signal transmission method according to claim 2, characterized in that: In step S3, the positioning signal is multi-symbol, multi-carrier. Each transmission symbol of the positioning signal forms a basic resource grid with a single carrier at a different frequency, and all basic grids together form a total resource grid. The positioning signal is divided into equal segments according to the number of carriers at different frequency points, and the equally divided positioning signal sequence is mapped to the basic resource grid with the corresponding number of carriers at different frequency points in sequence. The positioning signal is then transmitted by frequency hopping through the total resource grid.

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