Time-critical and delay-sensitive multimedia applications require more spectrum and
transmission resources. With the provision of cognitive radios (CRs), the underutilized …

在认知无线电系统中, 频谱检测是搜索空闲信道, 避免对授权用户产生干扰的关键环节.
本文提出了一种离散小波变换与时域能量检测相结合的频谱检测方法, 对认知用户共享的宽带 …

Compressed sensing (CS) is often utilized to lower the complexity of cyclostationary detector
(CD) in wideband sensing. In this paper, a methodology is proposed to further simplify the …

Spectrum scarcity is one of the major issues faced in Wireless communication technology.
Efficient spectrum utilization is of utmost importance to alleviate the problem of interference …

Spectrum sensing is a vital cognitive radio function that protects licensed users from
dangerous interference and finds accessible spectrum for better spectrum use. In practice …

认知无线电技术通过次级用户动态接入空闲频谱来提高空闲频谱资源的利用效率,
是认知无线电的重要环节. 在低信噪比环境下, 如何快速精确地进行频谱感知是频谱感知面临的 …

A new time-frequency transform, known as short-time Lv transform (STLVT), is proposed by
applying the inverse Lv distribution to process consecutive segments of long data sequence …

Electronically switchable microwave filters are attracting more attention for research and
development because of their importance in increasing the capability of wireless …

In the complex and changing radio environment, how to achieve the fast and accurate
spectrum sensing over an ultra-wide bandwidth is a big challenge. A novel compressed …

Detection of wideband communication signals is critical for cognitive radio (CR) as it
enables secondary users to dynamically access the unoccupied bands. However, accurate …