Short distance wireless communication technology is one of the most important technologies of wireless sensor network.At......

山梨实验线上列车的运行速度超过５００ｋｍ／ｈ，为保证列车安全运行，地面调度中心与列车乘务员的联络采用了容量大、速度快，可靠性高的数字化无线电......