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Automotive radar using ofdm pilot and data carriers for integrated radar and communications

A pilot sub-carrier and data sub-carrier technology, applied in the field of automotive radar that uses OFDM pilot and data carrier for integrated radar and communication, can solve the problem of limited bandwidth of V2X communication, and achieve the effect of reducing the peak-to-side lobe ratio

Active Publication Date: 2020-06-05
TOYOTA JIDOSHA KK
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the bandwidth allocated to V2X communication is limited

Method used

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  • Automotive radar using ofdm pilot and data carriers for integrated radar and communications
  • Automotive radar using ofdm pilot and data carriers for integrated radar and communications
  • Automotive radar using ofdm pilot and data carriers for integrated radar and communications

Examples

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Embodiment Construction

[0031] An example multicarrier modulation scheme is OFDM, which divides the available bandwidth into multiple narrowbands, each of which carries a modulated symbol to be transmitted (e.g., each narrowband is represented by a subcarrier, and the subcarrier uses a modulation scheme such as quadrature phase shift keying (QPSK) or any other suitable type of modulation scheme) for modulation). Figure 1B The signal spectrum of an OFDM signal (also interchangeably referred to as an OFDM waveform) is illustrated. OFDM waveforms include, for example, subcarriers 175, 176, 177 and 178 and Figure 1B Any other subcarriers not shown in . On the signal spectrum, the distance between every two adjacent subcarriers (illustrated as Δf in the frequency domain) is designed such that each subcarrier has nulls at the positions of other subcarriers, so that each subcarrier No interference with other subcarriers. Therefore, these subcarriers are said to be "orthogonal". This orthogonal arrange...

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PUM

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Abstract

The disclosure includes embodiments for performing integrated vehicular radar processing and data communications. In some embodiments, a method includes constructing a wireless signal based on a set of pilot subcarriers and a set of data subcarriers. The set of pilot subcarriers is used for radar processing and channel estimation while the set of data subcarriers is used for transmitting data. Themethod includes transmitting the wireless signal. The method includes listening for radar feedback associated with the wireless signal. The method includes determining pilot-subcarrier radar data from the radar feedback. The pilot-subcarrier radar data describes a part of the radar feedback that is associated with the set of pilot subcarriers. The method includes generating a radar processing result based on the pilot-subcarrier radar data to reduce a peak to side-lobe ratio of the radar processing result.

Description

Background technique [0001] The specification addresses the use of Orthogonal Frequency Division Multiplexing (OFDM) signals for integrated radar and communications applications in vehicles. [0002] Vehicles are expected to exchange increasing amounts of data with each other via vehicle-to-everything (V2X) communication for various vehicle applications. For example, vehicles may generate a large amount of sensor data and share sensor data with each other via any form of V2X communication, so that the driving safety of vehicles can be improved by processing sensor data. However, the bandwidth allocated for V2X communication is limited. [0003] Automotive radar uses a spectrum (for example, between 76 gigahertz (GHz) and 81 GHz) that is allocated specifically for radar measurements. The dual use of this spectrum for both data communications and radar functions has been discussed for years. Examples of dual use of this spectrum include the use of integrated radar and communi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04W4/40G01S7/02G01S13/58
CPCH04L27/2626H04L27/2647H04W4/40G01S7/023G01S13/58G01S13/931G01S7/006H04L5/0044H04L5/0048H04L5/0007H04L27/261H04L27/2614H04L27/26265H04W72/0453H04L5/001
Inventor O·阿尔廷塔斯C-H·王
Owner TOYOTA JIDOSHA KK
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