Many times, when we use Wi-Fi technology, we always complain that the signal range is not wide enough and the signal is not strong enough. However, have you ever thought about the limited signal range and limited communication distance to achieve another application? "NXP's Car-to-X communication technology takes advantage of the limited range of Wi-Fi technology. This technology called 802.11p is expected to significantly improve the real-time security of automobiles and enable intelligent traffic management." Drue Freeman, vice president of global sales and marketing for NXP's Automotive Electronics Division, stressed in an interview.
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Software radio + IEEE 802.11p enhances driving safety
Cars are high-speed moving objects. When improving real-time security and intelligent traffic management, many solutions always focus on using large-scale communication of long-distance communication to obtain information on the entire area. However, for the occurrence of hundreds of sports cars nearby The real-time information of meters can be difficult to obtain. Such a system is helpless for sudden traffic conditions. To make up for this deficiency, IEEE 802.11p can be used. IEEE 802.11p (also known as WAVE; Wireless Access in the Vehicular Environment) It is essentially an extension of IEEE 802.11, which is compatible with the relevant applications of Intelligent Transportation Systems (ITS). The application level includes data between high-speed vehicles and between vehicles and ITS roadside infrastructure (5.9 GHz band). exchange.
Why not consider 3G or cellular communication technology? "By testing, 3G technology is less responsive than 802.11p, so it is not suitable for such instant messaging applications." Drue Freeman said, "NXP is working with Cohda Wireless in Australia to apply this technology to cars." In fact, the technology has been specifically designed for automotive applications, such as more advanced hotspot switching, better support for mobile environments, enhanced security, and enhanced authentication. The benefits of this technology are expected to reduce deployment costs, increase bandwidth, and collect traffic information in real time.
The communication technology that NXP calls Car-to-X can not only realize the communication between the car and the car, but also realize the communication between the vehicle and the object, "for example, when the traveling car enters a construction site somewhere. After the signal range, it will receive the signal from the transmitter on the construction site. After the car accepts, it will automatically prompt the driver to adjust the route according to the direction of travel,†Drue Freeman explained. The advantage of this is that you don't have to receive a lot of traffic information that is not related to your route, and after receiving the signal, the car will automatically give the adjusted route prompt.
Figure 1 Schematic diagram of the dangerous alarm in Car-to-X
This technique can also give hints of super-visual range. For example, if there is a large truck in front of the moving car, it will completely block your view, and if the car in front of the truck suddenly brakes, it will cause great danger. Car-to-X communication technology can also give alarms to avoid the occurrence of rear-end tragedies. When passing through an intersection, the technology can also determine that a car that is obscured by a line of sight, such as a car that passes quickly in a vertical direction, gives an alarm.
Figure 2 Application scenario in Car-to-X: The car's line of sight is blocked by the cart
Drue Freeman emphasizes that the Car-to-X platform can meet the requirements of the automotive industry: even in harsh environments, it can reliably receive signals from fast-moving objects. This platform uses NXP software radio technology and Cohda wireless's advanced IEEE 802.11p. Radio technology convergence. At present, the platform has been tested in the field in Europe. "The field test of hundreds of vehicles will be conducted next year to test the information processing under complicated road conditions." He revealed that "this platform is expected to become a standard in Europe. In the future, it is also possible to promote it globally.†In 2014, this technology will enter the practical stage.
DSP+ sound technology enhances car comfort
If there is no large space, how can a high-powered engine improve the comfort of the car? Of course it is car audio! Moving the experience of home audio to the car will undoubtedly enhance the driving experience. Moreover, this is also a huge potential market. Recently, Wang Songlin, vice president of China National Machinery Industry Group, revealed at the "2011 Guangdong Equipment Manufacturing International Summit Forum" that "Ten At the end of the 2nd Five-Year Plan period, the number of Chinese autos will increase from the current 100 million to 200 million, accounting for 12% of the global car ownership! In developed countries, the proportion of aftermarket car audio is as high as 70%, while China's current ratio is only about 10%, which means that the car audio market has huge growth potential.
IHS iSuppli's automotive research report pointed out that the global high-end audio system sales will reach 7.9 billion in 2011, up 14% from last year's 6.9 billion, and will reach 13.3 billion in 2015. It is expected that high-end audio will come out in the next three years. The volume will maintain a growth rate of 12-18%. Undoubtedly, the booming development of high-end audio will also drive the upgrade of the low-end models in the audio. Currently, in the traditional low-end car audio processing, only simple analog processing, such as volume, frequency equalization and channel balance, etc., is performed. This is no longer enough to meet the needs of users. Some aftermarkets introduce consumer-grade audio processing technology into automobiles, but since consumer-grade electronic devices are not designed for in-vehicle specifications, there are hidden dangers of lack of functionality and safety.
Optimistic about the future development of the car audio market, NXP introduced SRS Labs' CS Auto surround sound technology optimized for the automotive environment in its DiRaNA series. Drue Freeman said NXP's DiRaNA2 car radio and audio solution is available. Support for Circle Surround AutomotiveTM (CS Auto) means that in the future, you can experience surround sound effects similar to home theaters, and automotive infotainment will enter the real era of digital audio processing.
Because the car environment is more complex than the home environment, the challenges in sound processing are even greater. The special layout inside the car, the position of the passengers, the size of the cabin and the position of the speakers all bring extremes to the car audio processing equipment. The big challenge, CS Auto is designed to solve this series of problems. The surround sound created by CS Auto technology, through more than four speaker systems, gives all passengers a perfect listening experience. Moreover, CS Auto provides surround sound for any form of audio content, including: traditional mono or stereo (two-channel) radio, satellite radio, HD radio, digital signal broadcasting, standard CD, and via portable media The compressed audio played back by the player.
“Actually, the introduction of this technology stems from the needs of Chinese manufacturers.†He revealed, “It is the Chinese car manufacturers that have put forward such sound effects, so we introduce them into the car, and the new car adopting this technology is expected 2012. At the beginning of the year, the technology will be extended to other countries in the future.†This is actually the return of NXP's focus on the Chinese market. – In March 2011, NXP's global automotive sales and marketing headquarters moved to Shanghai and was in Shanghai. Established China Automotive Technology Center (CTC).
Drue Freeman said NXP's DiRaNA family of products dominates most of the world's car audio markets. At present, DiRaNA series products have shipped more than 100 million units! Supporting CS Auto Audio IP, the SAF7741 is part of NXP's second-generation DiRaNA family. It not only supports dual HD radio reception, but also integrates an advanced audio processor that supports 5.1-channel, multi-channel analog and digital audio processing.
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