A new approach called dynamic spectrum access (DSA) promises to alleviate the problem of spectrum shortage.
新兴的动态频谱接入(DSA)技术可以解决频谱稀缺问题。
The thesis mainly focuses on spectrum sensing and dynamic spectrum access of cognitive radio system.
频谱感知能力是认知无线电通信的一个重要前提，也是其核心功能之一。
It is emphasized how to select the spread spectrum access code, and how to realize synchronization and modulation etc.
着重介绍了扩频地址码的选择及实现、同步方式和解调方法等。
For cognitive MIMO system based on the queuing stability model, the power control optimization problem and the system performance of spectrum access is analyzed.
研究了基于队列稳定性模型的认知多天线系统功率控制优化问题，并对系统性能进行了分析。
Cognitive radio can effectively improve the utilization of spectrum through dynamic spectrum access technology, in which the channel selection affects directly the performance of the system.
认知无线电可以通过动态频谱接入技术来有效的提高频谱的利用率，而在动态频谱接入中信道选择策略的优劣直接影响着系统的性能。
Cognitive radio can effectively improve the utilization of spectrum through dynamic spectrum access technology, in which the channel selection affects directly the performance of the system.
认知无线电可以通过动态频谱接入技术来有效的提高频谱的利用率，而在动态频谱接入中信道选择策略的优劣直接影响着系统的性能。
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