selective signal

Compared to the existing algorithm the performance is better under low signal-to-noise. A cooperative spectrum sensing algorithm based on selective clustering under unperfect control channel is proposed.

与已有算法相比，在噪声不确定性相同的情况下，该算法性能较优。针对非理想控制信道的情况，给出一种基于选择分簇的协作频谱感知算法。

Thirdly, signal scrambling techniques are analyzed , including Selective Mapping ( SLM ) and Partial TransmIt'sequences ( PTS ).

其次, 对信号扰码技术中的选择映射 ( SLM ) 法和部分选择序列 ( PTS ) 法进行了全面的研究与比较.

In the selective attention paradigm subjects were asked to respond as soon as possible when hearing the odd numbers ( target signal) and to withhold when hearing the even numbers ( non-target signal).

在选择注意试验中要求受试者对听到的奇数语音信号（靶信号）用右手作按键反应，对偶数语音信号（非靶信号）不按键。

Relative performance parameters of some transport equipment, satellite signal and solar signal in a station for verifying the feasibility of selective scheme are tested.

在选定方案的基础上对相关设备的性能进行了测试，并针对设备测试与对卫星信号的现场实际相关接收测试结果进行分析，验证了拟定方案的可行性。

OFDM as well as multi-channel-coding and multi-modulation is adopted by DRM. This combine with interleaving and error protection to decrease the effect of frequency selective fading, multi-path time delay and Doppler effect. Then the robustness of the signal transmitted is enhanced.

DRM采用OFDM调制方式和多级信道编码，使用交织、差错保护技术，大大地减轻了频率选择性衰落、多径时延以及多普勒效应的影响，提高了信号传输质量和稳定性。