认知无线电DFT调制滤波器组收发器的后检测集成

N. Mansour, D. Dahlhaus
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引用次数: 3

摘要

考虑了一种离散傅立叶变换(DFT)调制滤波器组(FB)收发器结构,该结构可用于在延迟色散衰落信道中工作的认知无线电系统的频谱感知和频谱接入。使用FB输出信号在辅助用户接收机上进行简单的检测后集成,用于在一组子载波上传输的差分相移键控符号的信号解调。将频谱感知的时频(TF)浓度特性与衰落信道特性的最大允许误码率(BER)方面的系统规格相结合,提出了FB原型滤波器系数的约束优化设计,并将主用户信号建模为高斯分布过程。研究了在室内场景下以30Mbit/s的原始比特率传输时的FB - TF分辨率特性和误码率性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Post detection integration in DFT modulated filter bank transceivers for cognitive radio
A discrete Fourier transform (DFT) modulated filter bank (FB) transceiver architecture is considered which can be used for both spectrum sensing and spectrum access in cognitive radio systems operating in delay dispersive fading channels. A simple post-detection integration at the secondary user receiver using the FB output signals is employed for signal demodulation of differential phase-shift keying symbols transmitted on a set of subcarriers. A constrained optimization design for the FB prototype filter coefficients is proposed which combines time-frequency (TF) concentration properties for spectrum sensing with system specifications in terms of the maximum allowed bit-error rate (BER) for the fading channel characteristics and models the primary user signal as a Gaussian distributed process. The FB TF resolution properties as well as the BER performance are investigated for transmission with a raw bit rate of 30Mbit/s in an indoor scenario.
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