The invention relates to a method for real-time detecting carrier signal in short-range wireless network, RF signal receiving and sending the first short-range wireless network in the end from the down conversion, get the baseband sampling receiving signal from the received signal; arbitrary sampling point, the received signal reads a code element cycle length for each received signal; the sampling points of the adjacent conjugate after operation on a time sampling point multiplication, get a set of related value sequence; statistics related to value series, the statistic value as a decision value; calculating the square all the sampling points of the amplitude of the received signal in value after the accumulation of energy statistics of received signal the value calculation of decision value; and the ratio of total energy statistics, and then compared with a threshold value ratio, and then estimate the channel state. The advantage of this method is that it does not need time and carrier synchronization, reduces computation and complexity, increases the real-time performance of the system, and improves the robustness of the algorithm to the system environment.
【技术实现步骤摘要】
【技术保护点】
一种短程无线网络中实时侦听载波信号的方法，其特征在于该方法包括以下各步骤： （１）接收短程无线网络中发送端发出的射频信号，进行下变频，得到基带２倍采样接收信号； （２）从上述接收信号中的任意采样点开始，读取一个码片周期长度的接收 信号，该接收信号序列记为ｒ＝［ｒ↓［１］，ｒ↓［２］，．．．，ｒ↓［Ｎ］］，其中Ｎ表示一个码元周期时间的采样信号个数； （３）对上述接收信号中的每个采样点进行共轭操作后与其相邻的采样点相乘，得到一组相关值序列，记为Ｃ＝［ｃ↓［１］，ｃ ↓［２］，．．．，ｃ↓［Ｎ－１］］，其中ｃ↓［ｉ］＝ｒ↓［ｉ］↑［＊］.ｒ↓［ｉ＋...
【技术特征摘要】
【专利技术属性】
技术研发人员：张良，赵振丰，朱金兵，
申请(专利权)人：北京威讯紫晶科技有限公司，
类型：发明
国别省市：11[中国|北京]
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