求翻译：频谱检测是认知无线电技术成立的前提和先决条件，只有在环境感知和检测的基础上，认知无线电才能够进行空闲频谱资源的利用。是什么意思？

Spectrum sensing for cognitive radio technology to set up the premise and prerequisite in environmental sensing and detection based on cognitive radio to be able to idle the use of spectrum resources.

Spectral detection is a cognitive radio technology was established and a prerequisite for the premise, only in context-aware and on a test basis, cognitive radio will be able to make free use of spectrum resources.

The frequency spectrum examination is the cognition radio technology establishment premise and the precondition, only then in the environment sensation and in the examination foundation, the cognition radio only then can carry on the idle frequency spectrum resources the use.

Spectrum test is a prerequisite for cognitive radio technology to set up and a prerequisite, only on the basis of environmental sensing and detection, cognitive radio to free use of the spectrum resource.

正在翻译，请等待...