OFDM认知无线电系统中基于时间感知的吞吐量性能

2016 2nd International Conference on Wireless and Telematics (ICWT) Pub Date : 2016-08-01 DOI:10.1109/ICWT.2016.7870858

N. Armi, Chaeriah. B.A.W, F. Y. Suratman, A. Wijaya

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引用次数: 3

摘要

在认知无线电(CR)中，频谱感知所需的时间是一个关键问题。二级用户(Secondary User, SU)需要对license频谱进行感知，以便尽快寻找机会。然而，快速传感降低了传感结果的保真度。感知时间对吞吐量性能有重要影响。本文研究了低信噪比下感知时间对吞吐量性能的影响。在确定噪声和不确定噪声的情况下，对空闲和繁忙状态下的吞吐量进行了评估。采用16 QAM OFDM技术作为主用户(PU)信号。在低信噪比条件下，在50 ms内具有一定的虚警(Pf)目标概率时，吞吐量性能逐渐提高。在空闲状态下，吞吐量比繁忙状态有更好的性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Sensing time-based throughput performance in OFDM cognitive radio system

The required time for spectrum sensing is critical issue in cognitive radio (CR). Secondary User (SU) must sense license spectrum to seek opportunities as quick as possible. However, quick sensing decreases the fidelity of sensing outcome. Sensing time has a significant impact to the throughput performance. This paper studies the impact of sensing time to the throughput performance at low signal to noise ratio (SNR). The throughput is evaluated in idle and busy states with certain and uncertain noises. OFDM technique with 16 QAM is used as primary user (PU) signal. At low SNR with a certain probability of false alarm (Pf) target during 50 ms, the throughput performance is gradually increased. In case of idle state, throughput has better performance compared with busy state.

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2016 2nd International Conference on Wireless and Telematics (ICWT)

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