Radar Architecture: How to Connect Different Radar Sensors
RENESAS is working towards providing cutting-edge solutions for future vehicles, with ECUs based on the R-Car Gen4 series and innovative components for both smart radar and satellite radar units.
1.1Architecture Evolution
In previous issues of the radar blog, we have addressed how the number of sensors in general and Radar modules, in particular, will be dramatically increased to achieve higher levels of autonomy and safety. In the next years, radar modules will be added to go from a basic configuration, with only a forward-looking radar with level L1 autonomy and 1 to 4 NCAP (new car assessment program) rating to up to level L2+ autonomy and NCAP 4-5 in standard cars and levels L3-L4 of autonomy and NCAP 5 in the premium segment, as shown in Figure 1.
Figure 1: Automotive radar for different NCAP and levels of autonomous driving.
The performance of the central computing units is expected to grow at a rapid pace with the centralization of the vehicle’s functions. Therefore, the processing of the data can be carried out in a more efficient way if the computation is not directly performed in the sensor modules. This leads to an evolution in the car E/E architecture to a distributed architecture. Of course, the migration to the fully distributed architecture will take a long time and is expected to be completed after 2030. But until then, some partial implementations will appear in the market.
As a first step, some domain controllers are for specific functions such as ADAS. Then the number of domain controllers will increase along with the level of autonomy of the car. With requirements for level L2+ of autonomy, zone controllers will be introduced along with the domain controllers, leading to the final step, centralized E/E architecture with the vehicle's central computer connected to the sensors through the zone control units. This evolution is illustrated in Figure 2. Of course, this will also be coupled with an exponential increase in software complexity and will require high-capacity networking in the vehicle.
Figure 2: E/E architecture mega trend (source: David Xu, Renesas Electronics).
With the new E/E architectures being introduced, part of the radar processing shown in Figure 3 will not take place on the radar module (edge computing) but will instead be delocalized for more efficient computations. The amount of processing in each module or control unit will be determined by the desired performance and by the available architecture.
Figure 3: Radar processing steps.
1.2 Smart Radar Sensors
Today’s radar architecture is based on separate radar modules distributed around the vehicle. Each module has its own radar transceiver and the capability to process the detected data on board, either using a single chip or with a separate microcontroller or SoC on the same module, as shown in Figure 4.
Figure 4: Smart sensors with edge processing.
The processed radar data are then transferred from each “smart radar sensor” to a remote domain control unit for further processing and fusion using a CAN bus. The different processing steps and where they are performed are illustrated in Figure 5.
Figure 5: Radar signal processing with smart radar sensors and domain control unit.
If enough sensors are used, the obstacles in the environment of the vehicle can be identified. For example, in the case shown in Figure 6, the ADAS ECU will receive the information of the objects detected by the forward-looking long-range radar, and from four corners of short- and mid-range radars, to create the full image of the surroundings.
Figure 6: Example of radar architecture with smart sensors (edge processing) and domain controller.
1.3 Satellite radar sensors
With the introduction of centralized computing architectures, in the future, the processing of the data from some radar modules could be de-localized. The radar modules themselves would then be less “smart”: now these satellite radar units will be able to perform a limited amount of processing of the received radar signals, for example, the range-FFT, before transferring the data to a remote ECU (either a domain or a zone controller), as shown in Figure 7.
Figure 7: Satellite sensors with central processing.
The ECU will then receive the pre-processed data from the different satellite radar modules and perform the main radar processing steps for each set of data. The obtained results can then be fused together, or combined with the information obtained from other sensors, to increase the accuracy of the detection. The different steps are illustrated in Figure 8.
Figure 8: Radar signal processing in satellite radar and central ECU.
In the first implementations of this centralized architecture with satellite radar modules, the data will be transferred to the ECUs using the vehicle’s Ethernet backbone. For some applications such as forward-looking radar or imaging radar, which require a large amount of radar, smart sensors will still be used, with full radar processing still being performed at the edge. On the other hand, several satellite radars will be distributed around the vehicle to provide 360° awareness of the surroundings. For example, in the architecture depicted in Figure 9, the data acquired by the corner and ultra-short-range radars will be pre-processed, possibly compressed, and then sent to the zone ECU for further computation.
Figure 9 shows radar architecture with satellite modules and remote processing on zone-based ECUs.
The use of satellite radar modules with a centralized processing architecture offers a wide range of benefits. On the one hand, the satellite radar modules become simpler, thus saving size and cost. They are also easier to repair and upgrade when necessary. The problem of heat dissipation is also reduced, especially for the modules placed close to other vehicle elements that can reach high temperatures, such as headlights.
By using the ethernet backbone of the vehicle for the data transfer the cost and the weight of the cabling can be optimized. Of course, security measures will have to be implemented for ethernet transmission. And now, the data will be in a format that is easy to store and process along with those from other sensors.
Using the vehicle’s control units for the processing allows not only for much more efficient processing of the radar data but also for more complex operations. Data fusion with other sensors like cameras or lidar, machine learning, and artificial intelligence can now be used to optimize the sensing and characterization of the environment, which will contribute to achieving higher levels of autonomous driving.
1.4 Comparison & conclusions
In the future, the E/E architecture of the vehicles will evolve towards centralized computing solutions. For some years, different architectures will coexist, with both smart sensors and satellite radar modules being used. The main differences are summarized in the following table.
Table 1: Smart sensors vs satellite sensors
As mentioned before, the migration towards centralized architectures with higher computing performance will require that high-speed links be available throughout the vehicle. In the near future, the architecture will rely on the Ethernet backbone of the vehicle. Yet, alternatives like the use of MIPI or A-PHY are being considered for future radar generations.
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本文由酉水浪子转载自Renesas News，原文标题为:Radar transceivers: key components for ADAS & Autonomous Driving 5.- Radar architecture: how to connect different radar sensors.，本站所有转载文章系出于传递更多信息之目的，且明确注明来源，不希望被转载的媒体或个人可与我们联系，我们将立即进行删除处理。
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型号- R-CAR V3X,Y-RH850-P1X-144PIN-PB-T1-V2,R7F7017623,Y-RH850-F1X-100PIN-PB-T1-V3,Y-RH850-F1X-233PIN-PB-T2-V1,R-CAR V4M,R-CAR V4H,R8A779M8,R8A779M7,R8A779M0,R8A779M2,R8A779M1,R8A779M4,R8A779M3,R-CAR GEN4,R-CAR V4X,R-CAR E3,R8A779M6,R-CAR E3E,R8A779M5,RL78/F1X,Y-R-CAR-M3N-SIP-BOARD-SKT-ES20,R7F7017603,R5F109LD,R5F109LC,RH850/D1M1A,R5F109LB,R5F109LA,R-CAR D3,R5F109LE,Y-RH850-F1X-324PIN-PB-T1-V1,Y-RCAR-V4H-WHITEHAWK-BRD-WS10,V3H2,Y-ASK-RL78F14-V2,RTP8J779M1ASKB0SL0SA103,F SERIES,R-CAR D3E,R7F702301BEBBA,R8A779G0LA01BA,R8A77980A,RTP8J779M3ASKB0SL0SA103,M3NE-2G,R-CAR S4-4,Y-ASK-RL78F15-V2,RL78/F13-CAN,R-CAR S4-8,Y-RH850-P1XC-404PIN-PB-T1-V2,RH850/F1KM-S1,RH850/F1KM-S2,RH850/F1KM-S4,Y-RH850-X2X-MB-T1-V1,RTE0T00001FWREA000R,RTE7702200EAB00000J,Y-ASK-RH850F1KM-S1-V3,R7F702002AEABA,R7F702002AEABG,R5F10BAG,R5F10BAF,R5F10BAE,R5F10BAD,R7F702011EABG,R5F10BAC,RTP0RC77995SEB0010S,R-CAR H3,RH850/F1KH-D8,R7F702011EABA,RTP0RC7796SIPB0012SS5A,Y-R-CAR-M3WE-8GB-BRD-DEV-WS30,R7F702301BFABG,Y-RH850-E2X-292PIN-PB-T1-V2,R5F10BBG,R5F10BBF,R5F10BBE,R5F10BBD,R5F10BBC,Y-RH850-E2X-373PIN-PB-T1-V3,H3,RL78/F12,RL78/F13,RL78/F14,RL78/F15,R5F10AAA,R5F10DGD,Y-QB-R5F113TL-TB-V2,R5F10DGC,Y-R-CAR-V3M-BOARD-DEV-ES20,R-CAR V3H,Y-ASK-RCAR-H3E-8GB-WS30,R5F10AAE,R5F10AAD,R5F10AAC,R5F10DGE,R7F701412,C SERIES,R7F701652,R7F701410,R7F701653,R7F701411,Y-RH850-P1X-100PIN-PB-T1-V2,R7F701650,E SERIES,R7F701651,Y-RH850-F1X-144PIN-PB-T1-V3,R7F701649,R7F701408,R7F701647,R7F701648,R7F701645,R7F701403,R7F701646,R5F10ABA,Y-QB-RL78D1A2-ZZZ-EE,M3E-2G,H3/M3,R5F10ABE,R5F10ABD,QB-R5F109GE-TB,R5F10ABC,R7F701423,R7F701421,R7F701422,U SERIES,R7F701417,R-CAR M3,R5F10CGD,R5F10CGC,R5F10CGB,Y-QB-RL78F14-ZZZ-EE,Y-SBEV-RCAR-KF-M06,Y-R-CAR-H3E-8GB-BRD-DEV-WS30,RH850/C1M-A2,RH850/C1M-A1,R7F702012AEABG,V3M,R5F10PAE,R5F10PAD,R7F701623,R7F702012AEABA,Y-R-CAR-H3-8GB-BOARD-SKT-WS30,R7F701401,RTP0RC77980SEBS012SA01,R7F701644,R7F701402,Y-ASK-RCAR-V3H-WS21,RTP8A77970ASKB0EG0SA001#WS,RTP8J779M5ASKB0SL0SA103,R5F10PBE,R5F10PBD,R5F10BGF,Y-RCAR-V3H-CONDOR-I-BRD-WS20,R5F10BGE,R5F10BGD,Y-RH850-X1X-MB-T1-V1,R5F10BGC,R8A77970,R5F10BGG,RH850/P1L-C,R5F113GL,R5F113GK,R5F10DLE,R5F10DLD,R5F10968,R7F701609,R5F1096E,R5F1096D,R5F1096C,R5F1096B,R5F1096A,Y-ASK-RCAR-V3M-WS20-REV2,R5F10AGG,R5F10DMJ,QB-R5F10BMG-TB,R5F10AGF,R5F10AGE,R5F10AGD,R5F10DMG,R5F10AGC,R5F10DMF,Y-RH850-U2A-292PIN-PB-T1-V2,R5F10DME,R5F10AGA,R5F10DMD,RL78/F13-LIN,Y-R-CAR-D3-BOARD-DEV-WS11,R7F701710,RH850/P1M-C,RH850/P1M-E,QB-R5F10PPJ-TB,Y-RH850-X1X-MB-T2-V1,R7F701708,R7F702300BEBBC,R5F10CLD,R7F701709,R7F702300BEBBB,Y-ASK-RCAR-V3M-WS20,R7F701278EAFP,Y-RH850-F1X-048PIN-PB-T1-V1,R7F701715,H3E-2G,R7F701714,R7F701711,Y-RH850-P1XC-292PIN-PB-T1-V2,Y-QB-RL78F15-ZZZ-EE,R5F10CME,R5F10CMD,R7F701371,R7F701372,Y-RH850-TFT-EXT-BRD,RH850/X2X,RH850/F1K,R5F10PGH,R7F701379,R5F10PGG,R5F10PGF,R7F701377,R5F10PGE,R7F701378,Y-RH850-E2X-40NM-EMU-ADAPTER-REV2,R5F10PGD,R7F701375,D SERIES,R7F701376,R7F701373,R7F701374,R5F10BLC,R5F10DPE,R5F10PGJ,F1KM-S4,R5F10DPL,R5F10DPK,R5F10DPJ,R5F10BLG,F1KM-S1/-S4,R5F10BLF,R5F10BLE,R5F10DPG,R5F10BLD,R5F10DPF,R7F701382,R7F701383,R7F701380,R7F701381,R-CAR M3E,R5F113LK,R7F701388,R7F701389,R5F10TPJ,R7F701386,R7F701384,R7F701385,R8A779H1LL31BA,R5F113LL,R5F10BMG,R5F10BMF,R5F10BME,R-CAR M3N,RTE0T0002LKCE00000R,R7F701275EABG,Y-BLDC-RH850F1KM-S1-V2,R5F113ML,R5F113MK,R7F701597,R5F10ALD,R5F10ALC,Y-RH850-F1X-176PIN-PB-T1-V4,R5F10ALG,RTP8J779M1ASKB0SK0SA003,R5F10ALF,R5F10ALE,RH850/X1X,F1KM-S1,R5F10AME,R-CAR S4,RH850/U2A16,RTP0RC77990SEB0020SA00,RH850,Y-RH850-P1XC-144PIN-PB-T1-V1,R5F10DSL,R5F10DSK,R5F10AMG,R5F10DSJ,R5F10AMF,R7F701690,R7F701691,RTP0RC77965SIPB012S-S,Y-R-CAR-M3NE-2GB-BRD-DEV-WS11,R7F701694,R7F701695,R7F701692,R7F701693,RH850/P1H-C,R7F701689,R5F10PLE,R5F113PG,R7F701580,R7F701581,Y-R-CAR-M3W-8GB-BOARD-SKT-WS30,RH850/P1X-C,R7F701586,R5F10PLJ,R5F113PL,R7F701587,R5F113PK,R5F10PLH,R5F113PJ,R5F10PLG,R7F701582,R7F701461,R5F10PLF,R5F113PH,R7F701583,R7F701462,R7F702300BFABA,RL78,Y-RH850-U2A-516PIN-PB-T1-V1,R5F10PMF,R5F10PME,R7F701432,R5F10PMJ,R7F701430,R-CAR M3NE,R7F701431,R5F10PMH,R5F10PMG,RH850/D1L1,RH850/D1L2,R7F701428,R7F701687,R7F701688,R7F701685,P SERIES,R7F701686,R7F701441,R7F701684,R7F701442,R5F109AA,RH850/D1M2,Y-RH850-F1X-064PIN-PB-T1-V1,R7F701437,R5F109AE,R5F109AD,R5F109AC,R5F109AB,R-CAR GEN3E,RH850/D1S1,RH850/U2A8,R5F113TK,R-CAR,R5F10PPH,R5F113TJ,R5F10PPG,R5F10PPF,R5F113TH,R5F10PPE,R5F113TG,Y-RH850-P1XC-080PIN-PB-T1-V1,RTE0T00020KCE00000R,R5F10PPJ,R5F113TL,Y-RH850-E2X-468PIN-PB-T1-V1,Y-QB-RL78F12-ZZZ-EE,R-CAR S4N-8,R8A779F5,R8A779F4,R8A779F7,R8A779F6,Y-RH850-U2A-373PIN-PB-T1-V1,Y-RTE0T0850AKCT00000J-EU,R-CAR S4N-4,Y-ASK-RH850F1K-V3,RH850/D1M1-V2,Y-R-CAR-E3-BOARD-DEV-WS11,RTP8A779F0ASKB0SP2S,Y-RH850-P1XC-100PIN-PB-T1-V1,RL78/D1A,RH850/E2UH,RTP0RC7795SIPB0012S-S03,RH850/D1M2H,RH850/E2X,Y-SBEV-RCAR-KF-GMSL02,Y-SICA20I2P,Y-ASK-RH850F1KH-D8-V3,Y-ASK-RL78F12-V2,R5F10A6E,R5F10A6D,R5F10A6C,R5F10A6A,Y-QB-RL78D1A-ZZZ-EE,RH850/D1X,R5F109GE,Y-ASK-RH850F1KM-S4-V3,R5F109GD,R5F109GC,R5F109GB,R5F109GA,Y-ASK-RL78F13-V2,R7F701391,R7F701390,F1KH-D8,R
RENESAS BEAMFORMING SOLUTIONS FOR SATCOM, RADAR & DIRECTIONAL COMMUNICATIONS
型号- F6212EVS,RRF6415-B00,F6513SEVS,RTKA81F6506ST000RU,RTKA81F6931000RU,F6522SEVS,F6923AVRI,F6122SEVS,F6513,F6921EVB,F641X,F6521SEVS,RRF6413-B00,RA81F6931GBX#BC0,RA81F6932GBX#BC0,F693X,F6123SEVS,F6922AVRI,F6123SAVGI,F6921AVRI,F6222,F61XX,F6942,F6941,F65XX,F6922EVB,RTKA81F6932000RU,F6506,F69XX,F692X,RTKRF6413-000,F6513SAVGI,F6121SAVGI,RA81F6506STGBX#BC0,F6521SAVGI,F6212,F6212AVGI,F6122SAVGI,F6931,F6413,F6923EVB,F6522SAVGI,F6932,F6415,RTKRF6415-000,F62XX,F6123,F6122,F6121,F6522,F64XX,F6521,F6923,F6922,F6921,F6121SEVS,F694X
现货市场
服务
可定制LAMP LED、 CHIP LED、 PLCC LED、 汽车用车规级LED、COB LED的尺寸/电压/电流等参数，电压1.5-37V，电流5-150mA，波长470-940nm。
最小起订量： 30000 提交需求>
可贴片PCB尺寸50*50mm-580*610mm；PCB厚度0.3-8mm；贴装精度CHIP元件+0.03,BGA Pitch 大于0.25mm；元件尺寸0201-74*74BGA；元件高度：30mm。
最小起订量： 1 提交需求>
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授权代理品牌：接插件及结构件
授权代理品牌：部件、组件及配件
授权代理品牌：电源及模块
授权代理品牌：电子材料
授权代理品牌：仪器仪表及测试配组件
授权代理品牌：电工工具及材料
授权代理品牌：机械电子元件
授权代理品牌：加工与定制
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