Signal Assemblage Based Wideband Spectrum Sensing for OFDM Cognitive Radios

被引：0
|
作者：
Qing, Han [1 ]
Chen, Siji [1 ]
Ali, Md Liton [1 ]
Shen, Bin [1 ]
机构：
[1] Chongqing Univ Posts & Telecommun CQUPT, Sch Commun & Informat Engn SCIE, Chongqing 400065, Peoples R China
来源：
2019 21ST INTERNATIONAL CONFERENCE ON ADVANCED COMMUNICATION TECHNOLOGY (ICACT): ICT FOR 4TH INDUSTRIAL REVOLUTION | 2019年
关键词：
Power-law detector; signal assemblage; cognitive radio; energy detector; SOURCE ENUMERATION; ENERGY DETECTION; CRITERION;
D O I：
10.23919/icact.2019.8701908
中图分类号：
TN [电子技术、通信技术];
学科分类号：
0809 ;
摘要：
This paper investigates power-law detector (PLD) based wideband spectrum sensing schemes for OFDM cognitive radios. By exploiting signal assemblage (SA) feature of the primary user (PU), we first propose a heuristic iterative threshold test (HITT) to roughly detect the SA set boundary of the noise and PU signal; Subsequently, a signal assemblage cardinality measuring (SACM) method is developed to refine the HITT decisions. Operating in SA-based wideband sensing manner, the PLD greatly overcomes the ambiguity in differentiating weak PU subcarriers from noise and significantly meliorates the sensing performance, compared with the non-SA methods.
引用
收藏
页码：488 / 491
页数：4
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