Spectrum Sensing Based on Time-frequency Dispersion Analysis
Wenxiu Zheng
Spectrum Sensing Based on Time-frequency Dispersion Analysis
Wenxiu Zheng
Abstract :A novel spectrum sensing algorithm is proposed based on
time-frequency dispersion analysis. Time-frequency ridge line is
firstly calculated of a received data's mutual correlation to form a
series of time-frequency dots. Time-frequency dispersion function is
subsequently defined to describe the dispersion level of the
time-frequency dots according to the fact that signal energy gather
around the carrier frequency and noise energy disperse evenly among
all frequencies. And the dispersion threshold is set to make an
existence decision of primary user's signal. Simulations indicates:
the time-frequency dispersion is robust to noise power uncertainty,
receiver's bandwidth and behaves stability with enough data length;
the proposed algorithm is effective both for normal and fading
channel and maintains good detecting performance at lower SNRs.
Key words :
Cognitive Radio
Spectrum Sensing
Dynamic Spectrum Access
Signal Detection
[1]
Lingxiao Ma;Yi Li;Hancong Tang;Weilai Chi;Depeng Dang. Parallel Chameleon Clustering Based on MapReduce [J]. , 2015, 12(6): 2053-2062.
[2]
Jun Chen;Zhengyang Luo;Chengying Gao. An Improved Hole-filling Technology Based on MLS [J]. , 2015, 12(6): 2063-2072.
[3]
Weixin Xie;Hongbin Huang;Haotian Zhai;Weiping Liu. Features Extraction and Classification of Rice Paper Images Based on Wavelet Transform [J]. , 2015, 12(6): 2073-2079.
[4]
Yehong Du;He Cui;Bing Li;Jie Li. Research on Regional Coverage with LAVs Based on MOPSOA [J]. , 2015, 12(6): 2081-2092.
[5]
Xiaojian You;Xiaohai He;Xuemei Han;Chun Wu;Hong Jiang. A Novel Cognitive Radio Decision Engine Based on Chaotic Quantum Bee Colony Algorithm [J]. , 2015, 12(6): 2093-2106.
[6]
Yao Fan;Yanli Chu. pplication of Improved ART Algorithm in Concrete Ultrasonic Imaging [J]. , 2015, 12(6): 2107-2116.
[7]
Lun Xie;Xin Liu;Zhiliang Wang. Micro-expression Cognition and Emotion Modeling Based on Gross Reappraisal Strategy [J]. , 2015, 12(6): 2117-2132.
[8]
Xiaoxue Guo;Haosen Lin. Remain Resource Reallocation DRA Algorithm with Multiple QoS Parameters Constraint [J]. , 2015, 12(6): 2133-2141.
[9]
Zhiwei Ni;Xuhui Zhu;Liping Ni;Meiying Cheng;Yiling Wang. An Improved Discrete Optimization Algorithm Based on Artificial Fish Swarm and Its Application for Attribute Reduction [J]. , 2015, 12(6): 2143-2154.
[10]
Siyuan Liu;Meng Wang;Haosong Hu. A Method and Application of Signal Demodulation Based on Wavelet Packet and Wavelet Ridge Decomposition [J]. , 2015, 12(6): 2155-2164.
[11]
Yuan Xi;Kai Cheng;Tao Xiao;Xitong Lou;Lei Cheng;Yanjuan Hu. Parametric Design of Reverse Blowing Pickup Mouth Based on Flow Simulation [J]. , 2015, 12(6): 2165-2175.
[12]
Hui Zhang;Peng Zhao;Jian Gao;Chengxiang Zhuge;Xiangming Yao. An Effective Intelligent Method for Optimal Urban Transit Network Design [J]. , 2015, 12(6): 2177-2184.
[13]
Xin Wang;Fulian Yin;Jianping Chai;Xinran Wang. The Research of Broadcast Television Community Discovery Technology Based on Double-weight Gaussian Kernel Similarity [J]. , 2015, 12(6): 2185-2196.
[14]
Yanli Huang;Beibei Xu;Xiaoliang Li. Properties of Rational General Solutions for First Order Multivariate Autonomous Rational Differential Systems [J]. , 2015, 12(6): 2197-2204.
[15]
Jianli Feng;Xiaomin Zhang. An Identification Algorithm of Passive Millimeter Wave Detection Armored Targets Based on Signal Complexity [J]. , 2015, 12(6): 2205-2212.