Title :
A method of PRACH detection threshold setting in LTE TDD femtocell system
Author :
Yanchao Hu ; Juan Han ; Shan Tang ; Huajie Gao ; Yongtao Su ; Jinglin Shi
Author_Institution :
Wireless Commun. Technol. Res. Center, Inst. of Comput. Technol., Beijing, China
Abstract :
Detection threshold is a crucial parameter in Physical Random Access Channel (PRACH) receiver and determines the detection performance and efficiency. A method of PRACH detection threshold setting in Long Term Evolution (LTE) Time Division Duplex (TDD) femtocell system is proposed in this paper based on theoretical analysis. This method uses the frequency domain correlation calculation results, and benefits from multiple antennas diversity combing to adjust the relative detection threshold, which is the ratio of absolute detection threshold and time varying noise level. Cumulative Distribution Function (CDF) of the relative threshold is modified to obtain the absolute threshold. Simulation results show that the proposed method fulfills the requirements of the system and gets a promotion in performance under certain false alarm probability and channel conditions.
Keywords :
Long Term Evolution; femtocellular radio; statistical distributions; time division multiplexing; LTE TDD femtocell system; Long Term Evolution; PRACH detection threshold setting; cumulative distribution function; false alarm probability; frequency domain correlation; physical random access channel; time division duplex; Antennas; Correlation; Delay; Frequency domain analysis; Noise level; Receivers; Simulation; LTE; PRACH; detection threshold; femtocell; random access;
Conference_Titel :
Communications and Networking in China (CHINACOM), 2012 7th International ICST Conference on
Conference_Location :
Kun Ming
Print_ISBN :
978-1-4673-2698-8
Electronic_ISBN :
978-1-4673-2697-1
DOI :
10.1109/ChinaCom.2012.6417517
