77 GHz automotive digital beamforming radar with SiGe chipset
ABSTRACT In this paper, we describe the design and layout of an automotive radar sensor demonstrator for 77 GHz with a SiGe chipset and a fully parallel receiver architecture which is capable of digital beamforming and superresolution direction of arrival estimation methods in azimuth. Additionally, we show measurement results of this radar sensor mounted on a test vehicle.
Conference Proceeding: System Design of a 77 GHz Automotive Radar Sensor with Superresolution DOA Estimation[show abstract] [hide abstract]
ABSTRACT: This paper introduces a novel 77 GHz FMCW automotive long range radar (LRR) system concept. High resolution direction of arrival (DOA) estimation is an important requirement for the application in automotive safety systems. The challenges in system design regarding low cost and superresolution signal processing are discussed. Dominant interferences to the MUSIC DOA estimator are amplitude and phase mismatches due to inhomogeneous antenna patterns. System simulation results deliver design guidelines for the required signal-to-noise ratio (SNR) and the antenna design. Road traffic measurements with a demonstrator system show superior DOA resolution and demonstrate the feasibility of the design goals.Signals, Systems and Electronics, 2007. ISSSE '07. International Symposium on; 01/2007
- [show abstract] [hide abstract]
ABSTRACT: An objective of developing intelligent transport systems (ITS) is to enhance driving convenience. As an ITS technology that meets this objective, an adaptive cruise control (ACC) system has already been commercialized. Another objective is to enhance the vehicle safety performance. With the aim of attaining this objective, we have developed a Pre-crash Safety system by evolving the ITS technology used in ACC. The Pre-crash Safety system is designed to predict an unavoidable collision and activate Pre-crash Seatbelt and Pre-crash Brake Assist well in advance of the collision to mitigate occupant injury caused by the collision. A millimeter-wave radar sensor is indispensable to the Pre-crash Safety system. This present paper describes the electronically scanned millimeter-wave radar sensor developed for use in the system. This radar is physically compact while providing high object recognition performance. This is due to the phased array technology employed for the first time in the world for automotive radar. Other features of the radar include a "high-efficiency planar antenna, "high-power and low-loss monolithic microwave ICs (MMICs) and millimeter-wave circuit" and a "high-speed digital-beam-forming (DBF) algorithm".Intelligent Vehicles Symposium, 2003. Proceedings. IEEE; 07/2003
Conference Proceeding: Substrate-embedded millimeter wave SiGe VCO chip[show abstract] [hide abstract]
ABSTRACT: A 77 GHz SiGe voltage controlled oscillator (VCO) chip is completely buried inside a printed circuit board (PCB) and connected to a high frequency laminate on top of the PCB using microvias. Several modules each containing a buried VCO chip are fabricated. The performance of these buried VCO chips regarding tuning range and output power is comparable with the measured performance of a classically connected VCO chip using wire bond technology. The successful operation of active monolithic microwave integrated circuits (MMICs) buried inside PCBs shows the potential of the novel technology used here.Microwave Symposium Digest, 2009. MTT '09. IEEE MTT-S International; 07/2009