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JP-2026074781-A - Data communication device, data communication method, and data communication program

JP2026074781AJP 2026074781 AJP2026074781 AJP 2026074781AJP-2026074781-A

Abstract

[Problem] To contribute to preventing data errors caused by interference between multiple radio signals with different polarizations. [Solution] The data communication device according to the present disclosure includes: a first receiving device that receives a first radio signal of a first frequency transmitted with polarization in a first direction and a second radio signal of a second frequency transmitted with polarization in a second direction, with polarization in a third direction, and generates a first received signal; a second receiving device that receives the first radio signal and the second radio signal with polarization in a fourth direction, and generates a second received signal; a first error detection device that generates a first error signal indicating the error between a first reference signal point indicating the reference of the signal point of the symbol of the first data in the first received signal and a first signal point of the symbol of the first data demodulated from the first received signal; and a first error removal device that removes errors from the first received signal based on the first error signal and the second received signal. [Selection Diagram] Figure 1B

Inventors

  • 本田 充宏

Assignees

  • ＮＥＣプラットフォームズ株式会社

Dates

Publication Date
20260507
Application Date
20241021

Claims (10)

  1. A first receiving device that receives a first radio signal of a first frequency, which includes a symbol of first data and is transmitted with polarization in a first direction, and a second radio signal of a second frequency, which includes a symbol of second data and is transmitted with polarization in a second direction different from the first direction, with polarization in a third direction to generate a first received signal, A second receiving device that receives the first radio signal and the second radio signal with polarization in a fourth direction different from the third direction to generate a second received signal, A first error detection device that generates a first error signal indicating the error between a first reference signal point indicating a reference for the signal point of the symbol of the first data in the first received signal and the first signal point of the symbol of the first data demodulated from the first received signal, A data communication device comprising: a first error removal device that removes an error from the first received signal based on the first error signal and the second received signal.
  2. A second error detection device that generates a second error signal indicating the error between a second reference signal point indicating the reference of the signal point of the symbol of the second data in the second received signal and the second signal point of the symbol of the second data demodulated from the second received signal, The data communication device according to claim 1, further comprising a second error removal device that removes an error from the second received signal based on the second error signal and the first received signal.
  3. The first direction and the third direction are the same, The data communication device according to claim 2, wherein the second direction and the fourth direction are the same.
  4. The data communication device according to claim 3, wherein the first direction and the third direction are orthogonal to the second direction and the fourth direction.
  5. The system further comprises a first combining device that combines the first received signal and the second received signal received by the first receiving device to generate a first combined signal, The data communication device according to claim 4, wherein the first error detection device generates a first error signal indicating the error between the first reference signal point and the first signal point in the first composite signal.
  6. The system further comprises a second combining device that combines the first received signal and the second received signal received by the second receiving device to generate a second combined signal, The data communication device according to claim 5, wherein the second error detection device generates a second error signal indicating the error between the second reference signal point and the second signal point in the second composite signal.
  7. A first radio signal of a first frequency, which includes a symbol of the first data and is transmitted with polarization in a first direction, and a second radio signal of a second frequency, which includes a symbol of the second data and is transmitted with polarization in a second direction different from the first direction, are received with polarization in a third direction to generate a first received signal. The first radio signal and the second radio signal are received with polarization in a fourth direction different from the third direction to generate a second received signal, The first received signal and the second received signal are combined to generate a first combined signal, The first received signal and the second received signal are combined to generate a second combined signal, To generate a first error signal that indicates the error between a first reference signal point indicating the reference of the signal point of the symbol of the first data in the first received signal and the first signal point of the symbol of the first data demodulated from the first composite signal, A data communication method comprising removing an error from the first combined signal based on the first error signal and the second combined signal.
  8. To generate a second error signal that indicates the error between a second reference signal point indicating the reference of the signal point of the symbol of the second data in the second received signal and the second signal point of the symbol of the second data demodulated from the second composite signal, The data communication method according to claim 7, further comprising removing an error from the second combined signal based on the second error signal and the first combined signal.
  9. A process of generating a first received signal by receiving a first radio signal of a first frequency, which includes a symbol of first data and is transmitted with polarization in a first direction, and a second radio signal of a second frequency, which includes a symbol of second data and is transmitted with polarization in a second direction different from the first direction, with polarization in a third direction, A process of receiving the first radio signal and the second radio signal with polarization in a fourth direction different from the third direction to generate a second received signal, A process of generating a first combined signal by combining the received first received signal and the second received signal, A process of generating a second combined signal by combining the received first received signal and the received second received signal, A process for generating a first error signal that indicates the error between a first reference signal point indicating the reference of the signal point of the symbol of the first data in the first received signal and the first signal point of the symbol of the first data demodulated from the first composite signal, A data communication program that causes a processor to perform a process of removing errors from the first combined signal based on the first error signal and the second combined signal.
  10. A process for generating a second error signal that indicates the error between a second reference signal point indicating the reference of the signal point of the symbol of the second data in the second received signal and the second signal point of the symbol of the second data demodulated from the second composite signal, The data communication program according to claim 9, which causes the processor to further perform a process of removing an error from the second combined signal based on the second error signal and the first combined signal.

Description

This disclosure relates to data communication equipment, data communication methods, and data communication programs. A method is known in which a radio wave signal modulated by data is transmitted from the transmitting side via multiple antennas with different polarization directions, and the transmitted radio wave signal is received from the receiving side via multiple antennas with different polarization directions. Furthermore, a method is known in which a radio wave signal of multiple frequencies, each modulated by one of multiple types of data, is transmitted from the transmitting side, and the transmitted radio wave signal of multiple frequencies is received from the receiving side. For example, Patent Document 1 discloses a method in which a radio wave signal of two different frequencies is transmitted from the transmitting side via two antennas with orthogonal polarization. Japanese Patent Publication No. 2022-161731 Figure 1A is a diagram illustrating an example of the configuration of a data transmission and reception system according to one embodiment of the present disclosure.Figure 1B is a diagram illustrating an example configuration of the data communication system shown in Figure 1A.Figure 1C illustrates one example configuration of the error removal device shown in Figure 1B.Figure 1D illustrates an example of a process in which the error-removed signal is subtracted from the composite signal using the error removal device shown in Figures 1B and 1C.Figure 1E illustrates the signal points of the transmitted data symbols in a composite signal when it is affected only by error radio signals.Figure 1F illustrates the signal points of the symbols of the transmitted data V in the composite signal V when it is affected by disturbances such as error radio signals and other noise signals.Figure 1G illustrates an example configuration of an arithmetic processing unit that executes instruction commands included in one or more programs that realize the functions of the components of a data transmission and reception system.Figure 2 is a flowchart illustrating an example of the operation of the data transmission and reception system shown in Figure 1 and other figures.Figure 3A is a diagram illustrating an example of normal operation of a data transmission and reception system.Figure 3B illustrates an example of normal operation in a data transmission and reception system when diversity using frequency, vertical polarization, and horizontal polarization is not performed.Figure 4A illustrates an example of abnormal operation in a data transmission and reception system.Figure 4B illustrates an example of abnormal operation that occurs when diversity is not implemented in a data transmission and reception system. The embodiments of this disclosure will be described below with reference to the drawings. However, this disclosure is not limited to the embodiments described below. Furthermore, in each drawing, identical or corresponding elements are appropriately denoted by the same reference numerals, and identical or corresponding processes and communications are appropriately denoted by the same reference numerals. It should also be noted that the drawings are schematic, and the dimensional relationships and proportions of each element may differ from reality. Furthermore, the dimensional relationships and proportions may differ between drawings. In addition, the connecting lines between blocks in the drawings referenced below include both bidirectional and unidirectional lines. Unidirectional arrows schematically indicate the flow of the main signal (data) and do not exclude bidirectionality. Furthermore, the direction of antenna directivity may have an error within the tolerance range, the range recognized among those skilled in the art, or the range technically permissible. Figure 1A illustrates an example configuration of a data transmission/reception system 1 according to one embodiment of the present disclosure. The data transmission/reception system 1 shown in Figure 1A comprises a transmitting system 10 and a receiving system 12 (data communication device). The transmitting system 10 includes a data communication system 14-1, an antenna 14V-1 with vertical polarization (first direction, third direction), and an antenna 14H-1 with horizontal polarization (second direction, fourth direction). Hereinafter, "vertical polarization" will also be written as "vertically polarized," and "horizontally polarized" will also be written as "horizontally polarized." The receiving system 12 includes a data communication system 14-2, a vertically polarized antenna 14V-2, and a horizontally polarized antenna 14H-2. Furthermore, as will be described later with reference to Figures 1B, 1C, and 1G, data communication systems 14-1 and 14-2 have the same configuration and can operate in the same way, so data can be transmitted bidirectionally between the data transmission/reception system 1 and the data communication sy