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Co-prime coding (CPC) Doppler division multiplexing (DDM) MIMO radar method and system

A radar system and Doppler spectrum technology, applied in the field of automotive radar systems, can solve problems such as practical difficulties

Pending Publication Date: 2022-06-03
NXP USA INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

To sum up, under the performance, design, complexity and cost constraints of existing radar system applications, existing radar system solutions are extremely difficult at the practical level, because it is necessary to achieve the performance advantages of larger size radars and Achieving higher resolution radar imaging is challenging

Method used

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  • Co-prime coding (CPC) Doppler division multiplexing (DDM) MIMO radar method and system
  • Co-prime coding (CPC) Doppler division multiplexing (DDM) MIMO radar method and system
  • Co-prime coding (CPC) Doppler division multiplexing (DDM) MIMO radar method and system

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Embodiment Construction

[0020] Described is a coprime coding (CPC) Doppler division multiplexing (DDM) MIMO radar system, hardware circuit, system, architecture and method for evaluating Doppler by using coprime based zero radial velocity frequency spacing The MIMO waveform is coded to allow stable and unambiguous reconstruction of the individual transmitter Doppler spectrum detection to eliminate overlapping Doppler spectra from multiple transmitters. In selected embodiments, CPC coding is implemented in a separate LFM DDM MIMO transmitter to implement progressive phase in slow times (ie, chirp times) by using programmable phase rotators in each transmit channel Coded so that the spacing value (in the number of bins, between two adjacent zero radial velocity Doppler bins) agrees with the coprime value. By applying a progressive phase shift to the chirp signal, each transmit signal has a different co-prime coded phase offset from the transmit reference signal so that the amount of progression between...

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Abstract

A co-prime coded DDM MIMO radar system, apparatus, architecture and method are equipped with a reference signal generator (112) that generates a transmit reference signal; a plurality of DDM transmission modules (11) generating, conditioning and transmitting a plurality of transmission signals, each transmission signal having a co-prime coded (CPC) progressive phase offset different from the transmission reference signal; a receiver module (12) receiving a target return signal reflected from the plurality of transmit signals by a target and generating a digital signal from the target return signal; and a radar control processing unit (20) configured to detect Doppler spectrum peaks in the digital signal, where the radar control processing unit comprises a Doppler disambiguation module (25) configured with a CPC decoder to associate each detected Doppler spectrum peak with a corresponding DDM transmission module, where the Doppler disambiguation module (25) is configured with a CPC decoder to associate each detected Doppler spectrum peak with a corresponding DDM transmission module. A plurality of Doppler spectrum peak detections associated with the transmitter are thereby generated.

Description

technical field [0001] The present invention generally relates to radar systems and associated methods of operation. In one aspect, the present invention relates to an automotive radar system formed from a multiple-input multiple-output (MIMO) radar array. Background technique [0002] Radar systems can be used to detect the range, velocity and angle of nearby targets. As technology advances, radar systems can now be used in many different applications, such as automotive radar safety systems are increasingly using radar systems to detect changes in the surrounding environment, such as approaching another car for blind spot detection or to detect improved cruise control leading vehicle. Accurate radar detection is also an integral part of autonomous vehicle control systems. However, there are challenges in accurately detecting the position and movement of objects using radar systems that can be built into cars. A common approach to improving the angular resolution of aut...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/931G01S7/282G01S7/285
CPCG01S13/931G01S7/282G01S7/285G01S13/006G01S13/878G01S13/913G01S7/42G01S13/325G01S13/34G01S13/449G01S13/582H04B7/0413
Inventor 吴浩云任东寅萨蒂什·拉温德拉
Owner NXP USA INC