Research And Implementation Of The Uplink Ranging And Channel Estimation Based On IEEE802.16e Standard

With the fast development of Information Industry, the global communication industry displays the traits of Mobility, Broadband and IP-based architecture, the appearance of IEEE802.16e meets the trend of development, and IEEE802.16e is a potential Broadband Wireless Access technology. This article researches the physical level technology of OFDMA system based on IEEE802.16e standard, the uplink ranging and channel estimation are key technologies in the physical level, focus on these two technologies. Firstly, a brief introduction of the ranging types and process, the time domain detection and the time-frequency detection algorithm are researched, in view of the uplink frame structure based on IEEE802.16e, the effective time-frequency detection algorithm is presented, and the performance of time-frequency detection algorithm is superior. Secondly, in view of multi-user collision phenomenon in the actual system, researches the multi-user detection algorithm based on interference clearance and gives simulation results. Least square, linear minimum mean-squared error and decomposition based on the singular value are researched, to obtain the entire channel's response, several interpolation algorithms are researched and simulated .Uses the Altera FPGA chip, completes the uplink ranging and channel estimation.