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- A spectrum hole detection scheme using the feature of cyclostationary of the comminicating signal is proposed, and its feasibility and reliability is tested with PSK signal as an example. 本文提出了利用通信信号的循环平稳特征进行频谱空穴检测的方案，并以PSK信号为例验证了该方法的有效性和可靠性。
- Autoregressive channel models based on Kalman filtering can estimate the spectrum holes well，and are commonly used to approximate discrete-time random processes. 采用基于卡尔曼滤波的自回归信道预测模型可较好地估计频谱空洞，自回归模型常用于近似离散时间随机过程。
- His strength in a crisis is an ace in the hole. 临危不惧是他的看家本领。
- He chiseled a hole in the door to fit a new lock. 他在门上凿了个孔，以便装一把新锁。
- The bird picked a hole in the ice with its beak. 那鸟在冰上啄出了一个洞。
- The child has picked a hole in his new jumper. 孩子的新毛衣上勾了一个洞。
- Stick your hand in and see what's in the hole. 把手伸进去，看看洞里有什么。
- The dog skins through the small hole in the wall. 那条狗勉强钻过小小的墙洞。
- The survey covered a broad spectrum of topic. 这本简史涉及的话题范围很广。
- The men in the hole sent up for more equipment. 在洞穴中的人们向上面要求再给他们一些设备。
- The mice have nibbled a hole in the cheese. 老鼠在奶酪上啃出了一个洞。
- I saw a rabbit dive into its hole. 我看见一只兔子钻进洞。
- She poked her finger into the hole. 她把手指插入孔中。
- Their dog bit a hole in my trousers. 他们的狗把我的裤子咬了个窟窿。
- He knocked a big hole in the wall. 他把墙撞出了一个大洞。
- He burned a hole on the ironing board. 他把熨衣板烧了一个洞。
- The hospital bills made a big hole in her savings. 住院费花去了她一大笔存款。
- Red and violet are at opposite ends of the spectrum. 红色和紫色位于光谱相对的两端。
- A maniac have gouge several hole in the priceless painting. 有个狂徒在那幅价值连城的画上乱凿了几个洞。
- Having lost my money puts me in rather a hole. 丢了钱使我陷于困境。
