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Investment of HARQ Technology Based on IEEE802.16E

Author: LiangJuan
Tutor: LiZuo
School: Harbin Institute of Technology
Course: Information and Communication Engineering
Keywords: HARQ The data buffer allocation and control strategy MIMO AMC
CLC: TN929.5
Type: Master's thesis
Year: 2009
Downloads: 36
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Abstract


Wireless channel propagation environment by various fading and noise interference , and multipath effects and Doppler frequency shift factors greatly influence the quality of the communication . The error control techniques as an effective means to solve this problem . In digital systems , the use of the error detection code or error correction code for error control mainly of two parts : the automatic retransmission request ARQ and the former to the correction mode FEC . Hybrid automatic retransmission request (HARQ) technology is the effective combination of FEC and ARQ techniques , not only reduces the FEC unnecessary overhead , relatively simple ARQ can achieve higher throughput . HARQ mechanism in the IEEE802.16e standard IEEE802.16e protocol system architecture , as well as the principle and the concrete implementation of the the IEEE802.16e protocol based HARQ technology , focus on the Chase HARQ performance agreement Chase HARQ -depth simulation and analysis . Secondly, the actual system relevant the HARQ data cache area allocation and use of a data cache is dynamically allocated and real-time control strategy . And for the key technologies of the IEEE802.16e protocol MIMO ( multiple input multiple output technology ) and AMC (Adaptive Modulation and Coding Technology ) , HARQ and MIMO approach to integration , adaptive MIMO mode . Finally HARQ and AMC joint control mechanism , using HARQ technology requires the identification of the modulation coding manner can be reduced and the sensitivity of the measurement errors and flow fluctuations .

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