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Research on Detection Algorithm for LTE Uplink Multi-user MIMO System

Author: JiangTong
Tutor: ZhangHaiLin
School: Xi'an University of Electronic Science and Technology
Course: Communication and Information System
Keywords: LTE Single carrier frequency division multiple access Multi-user MIMO Interference Cancellation Sphere decoding
CLC: TN929.5
Type: Master's thesis
Year: 2011
Downloads: 289
Quote: 1
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Abstract


In order to adapt to the rapid development of mobile communication , 3GPP 3G Long Term Evolution LTE ( Long Term Evolution ) . OFDM and MIMO in LTE advanced wireless transmission technology to improve spectrum efficiency and system performance . As the PAPR of the OFDM higher , so as SC-FDMA (Single Carrier-Frequency Division Multiple Access) , LTE uplink transmission technology based on the frequency domain to generate the DFT - S- OFDM method . The LTE uplink multi-user MIMO the different terminals occupy the same time-frequency resources transmit data stream at the receiving end need to use state-of-the-art detection technology to detect the data stream . This paper studies the receiving end in the the LTE uplink multi-user MIMO system interference cancellation algorithm and sphere decoding algorithm . This paper introduces a model of the LTE uplink multi-user MIMO system , based on this model were studied serial interference cancellation ( SIC ) algorithm based on QR decomposition interference offset algorithms and parallel interference cancellation ( PIC ) , and the three algorithms BER performance simulation and analysis . Then, the sphere decoding algorithm based on depth-first search and breadth-first search strategy , and gives the algorithm based on depth-first search strategy sphere decoding algorithm , the improved algorithm in approximate maximum likelihood decoding performance At the same time , reduces the search complexity of the algorithm . Finally, in the LTE uplink multiuser MIMO systems to simulate and analyze the performance of several sphere decoding algorithm and its improved algorithm .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Wireless communications > Mobile Communications
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