Square-Law Combining Double-threshold Energy Detection in Nakagami Channel
نویسندگان
چکیده
In cognitive networks, cooperative spectrum sensing can increase detection performance significantly. In this paper, square-law combining technique is chosen as cooperative diversity scheme in energy detecting when the wireless environment is modeled as Nakagami channel. Moreover, we use double-threshold algorithm to reduce the effect caused by noise uncertainty. Error detection probability is derived to analyze the effect of noise interference. We show that our cooperative scheme restrains the effect of noise interference greatly. Further more, square-law combining technology can greatly decrease weak detecting performance caused by double-threshold energy detection algorithm partly.
منابع مشابه
Energy Detection with Diversity Reception
We characterize the performance of energy detector (ED) over square-law, square-law selection, and switch-and-stay diversity combining schemes. The exact average probabilities of a miss (Pm), and a false alarm (P f ) are derived in closed-form. To derive Pm for versatile Nakagami-m and Rician fading channels, a twofold approach, using the probability density function (PDF) and the moment genera...
متن کاملPerformance Analysis of Non- Coherent FSK System with Square Law Combining our Nakagami- m Fading Channel
The probability of error for NFSK with square law combining for diversity correlated Nakagami channels is analyzed. The closed for of expression using characteristic function is derived. The average SNR per branch is considered to be distinct. The effect of different noise powers for various diversity orders and fading channel parameters on probability of error and unequal SNR distribution is b...
متن کاملParallel Decentralized Network for the Detection of Unknown Signals Through Wireless Nakagami Fading Channels
In this paper analytical and simulation results for the decentralized detection of unknown signals are introduced. Parallel sensor network scheme is assumed. Additive White Gaussian Noise (AWGN) and Nakagami fading are assumed in both links, that is, from the source to the decentralized local sensors and from the sensors to the fusion center. Furthermore, diversity employing Square Law Combinin...
متن کاملSelection Diversity Combining Analysis of Energy Detector Over a-fl Generalized Fading Channels
This paper addresses the problem of energy detection of an unknown deterministic signal over a general fading channel model. More particularly, a closed-form mathematical expression is derived for the energy detector's probability of detection over a-# generalized fading channel with selection combining diversity reception. The derived expression can be used to study the performance of energy d...
متن کاملR Collaborative Spectrum Sensing over Nakagami Fading Channel in Cognitive Radio
Spectrum sensing is a challenging task for cognitive radio. In this paper we analyze collaborative spectrum sensing over Nakagami fading channel in cognitive radio. Through computer simulation, we evaluate the performance of collaborative spectrum sensing and signal detection by employing OR, AND and MAJORITY rules as decision combining. Energy detection is one of the popular spectrums sensing ...
متن کامل