1) multi-chirps jamming
多个宽带Chirp干扰
1.
Based on the impulse characteristic presenting the Chirp jamming in the FRFT domain, the identification and excision for the multi-chirps jamming in DSSS communications system is proposed, which implements FRFT for received signal and then searches and eliminates the local maximum above a threshold, and then makes invert FRFT so that the interference is identified and removed one by one.
根据宽带Chirp干扰信号在与其调频斜率一致的分数阶傅里叶变换域呈现冲激函数特征,对接收的信号进行连续阶数的分数阶傅里叶变换,在适当的阈值下搜索并剔除其局部极大值后再进行反变换,从而对直接序列扩频通信系统中多个宽带Chirp干扰逐一识别和剔除,该方法计算量适中,且对干扰的强弱有较大的适应范围,仿真实验结果证明了这种方法的有效性。
2) wideband interference
宽带干扰
1.
Adaptive space-time processing algorithm for GPS wideband interference suppression is studied and analyzed in this paper.
分析研究了GPS宽带干扰抑制的各种空时自适应处理算法,提出了期望信号协方差矩阵的计算方法,该方法使得最大信干噪比方法和最小均方误差方法可以实现。
2.
In order to restrain wideband interference signal effectively, a new receiving beamforming method of wideband and large scan angle was presented.
为了抑制宽带干扰信号,提出了一种宽带大扫描角接收波束形成新方法。
3.
In order to suppress wideband interference and make pattern null in the direction of interference, a new wideband transmitting beamforming method for a large scanning angle is presented.
为了抑制宽带干扰信号,在发射方向图上形成干扰凹口,提出了一种宽带宽角发射波束形成新方法。
4) broadband jamming
宽带干扰
1.
The antijamming performance of OFDM(Orthogonal Frequency Division Multiplexing)with various jamming types was analyzed,such as broadband jamming,pulse jamming,partial-band jamming,multitone jamming and so on,and the performances with coding and interleaving were also given.
对正交频分复用OFDM系统的抗干扰性能进行了分析,给出了宽带干扰、脉冲干扰以及部分频带干扰在卷积编码及未编码情况下的理论误码率性能界,用仿真给出了其它干扰样式的误码性能,分析得出了最佳的干扰样式及其对应的最佳干扰因子和其它的一些有益结论。
5) Chirp interference
Chirp干扰
6) chirp-like interference
chirp-like干扰
1.
Among them, chirp-like interference is a common type of time-varying interferences.
其中,chirp-like干扰是一类常见的时变干扰,它包括线性(如LFM)时频结构和非线性(如HFM)时频结构两类。
补充资料：宽带和窄带业务
宽带业务是相对窄带业务而言的，一般来说，对于速率低于2Mb/s的通信业务统称窄带业务，如电话网、N-ISDN所提供的业务。对于高于2Mb/s的通信业务，如帧中继业务、视频点播、ATM业务、TV会议等称为宽带通信业务。 目前投入应用的宽带接入技术主要有两种：ADSL和FTTX＋LAN。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条