초록

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Abstract ▼ AI-Helper

Recently, there has been increasing attention to vehicular safety related with smart car equipped with wireless communication system. For this purpose, wireless access in vehicular environments(WAVE) system has been developed. However, this is not enough to guarantee the safety and the minimum saf...

Recently, there has been increasing attention to vehicular safety related with smart car equipped with wireless communication system. For this purpose, wireless access in vehicular environments(WAVE) system has been developed. However, this is not enough to guarantee the safety and the minimum safety distance from my car to cars ahead in several hundred meters range should be kept for emergent stop when the distances are too close. The frequency bands for car radar of 77㎓ and 90㎓ are assigned in United States, 77㎓ in EU, and 60㎓ in Japan, respectively. In this paper, four kinds of frequency bands including 300㎒, 5.8㎓, 24㎓ and 47㎓ are considered for ranging performances of chirp radar signals. The frequency bands of 5.8㎓ and 24㎓ showed better performances in case of S/I=-20㏈, and the error rates of 5.8㎓ and 300㎒ were lower in case of S/I=-10㏈ assuming Rician fading channel and Gaussian interferences.

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