占用空闲频段的情况用经典信号检测与估计理论的方法即可以完成检测；
For the former, the classic theory of signal detection and estimation methods can be used to solve the problem;
这是一篇比较有价值的关于MIMO信道估计与接收端信号检测的文章。
This is a valuable on the MIMO channel estimation and signal detection receiving end of the article.
同时提出相关法与周期谱估计相结合的方法，并证明该方法可进一步改善信号的检测能力。
In the meantime the correlation algorithm is combined with periodic spectral estimation, and a further improvement of the signal detection ability using this method is proved.
目前，国内外对MIMO雷达的研究主要集中在有源mimo雷达DOA估计、目标检测性能分析和波形设计与多通道信号模型等方面。
Nowadays, studies on MIMO radar mainly focus on DOA estimation, target detection performance analysis, waveform design and multi-channel signal modeling of active radars.
这两种方法既可用于多段线性调频连续波探测回波的积累检测，也可用于多个相参脉冲信号的积累与频率估计。
The new methods can be used in both detection of FMCW echo and frequency estimation of correlative pulse train.
采用高功率射频信号内部互调失真的包络特性检测与比较技术，对射频功率带外信号进行检测和估计。
This paper describes a new high power RF amplifier's IMD signal envelope detection method and compare technology, which is used to detect and estimate the RF spectral regrowth.
提出基于小波尺度图重分配的信号瞬态特征检测方法和瞬时能量估计方法，并应用于轴承在多种轻微故障状况下的振动非平稳特征的检测与表示。
The singal transient feature detection represent method, and a transient energy evaluation method are used based on the reassigned scalogram for the vibration non-stationary feature representation.
提出基于小波尺度图重分配的信号瞬态特征检测方法和瞬时能量估计方法，并应用于轴承在多种轻微故障状况下的振动非平稳特征的检测与表示。
The singal transient feature detection represent method, and a transient energy evaluation method are used based on the reassigned scalogram for the vibration non-stationary feature representation.
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