探测参考信号

Probe reference signal

以上为机器翻译结果，快速获取精准的人工翻译结果，建议选择有道人工翻译

1
Sounding reference signals
LTE中的上行参考信号（转）改变根序列。为了支持频率选择性调度，UE需要对较大的带宽进行探测，通常远远超过其目前传输数据的带宽。这就需要应用信道探测参考信号(Sounding Reference Signal，SRS)。SRS是一种“宽带的”参考信号。多个用户的SRS可以采用分布式FDM或CDM的方式复用在一起，可以

短语

1
外差探测用来探测传感臂和参考臂由于温度变化引起的输出信号的频率差异。
The heterodyne detection is used to detect the output signal frequency difference between the reference arm and sensing arm, which is caused by the temperature variation.
2
给出了系统的最小可探测信号功率和可提供的参考光功率，指出了影响系统特性的关键参数。
We find out the minimum detectable signal power and the produced reference beam output. Several key factors which affect the system characteristics strongly. are pointed out.
3
体全息光栅由球面信号光波和平面参考光波干涉记录，并以原信号光作为探测光波进行成像。
Volume holographic grating, used as a volume holographic imaging lens in the imaging system, is recorded via illuminating the recording medium with a spherical signal beam and a plane reference beam.

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