New Methods for Fast Detection for Embedded Cognitive Radio

Grégoire De Broglie, Louis Morge-Rollet, D. L. Jeune, F. Roy, C. Roland, Charles Canaff, J. Diguet
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Abstract

Spectrum Sensing is an important part of Cognitive Radio (CR) process. It can be used to determine if a Primary User (PU) (i.e. a licensed user) is emitting or not in the communication channel. This paper presents and compares three types of FFT-based detection algorithms for LTE-Advanced (LTE-A) cellular network at Orthogonal Frequency Division Multiple Access (OFDMA) level. These detectors sense the usage of the minimum time-frequency called Resource Block (RB). They are also low latency detectors and they only need one particular Orthogonal Frequency Division Multiplexing (OFDM) symbol to detect the usage of one RB. The three new detectors are based respectively on energy, correlation, and one what will be called eogration which combines energy and correlation. We analyze them with the Fisher's ratio and simulations of hypothesis test. The computing complexity of these detectors is also theoretically analyzed to provide guidance for future implementations.
嵌入式认知无线电快速检测新方法
频谱感知是认知无线电(CR)过程的重要组成部分。它可用于确定主用户(PU)(即许可用户)是否在通信通道中发射。提出并比较了正交频分多址(OFDMA)级LTE-A蜂窝网络中基于fft的三种检测算法。这些检测器检测被称为资源块(Resource Block, RB)的最小时间频率的使用情况。它们也是低延迟检测器,它们只需要一个特定的正交频分复用(OFDM)符号来检测一个RB的使用。这三种新的探测器分别基于能量、相关性和一种将被称为能量和相关性相结合的eogration。我们用费雪比和模拟假设检验对它们进行了分析。对这些检测器的计算复杂度进行了理论分析,为今后的实现提供指导。
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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