Research On LTE Uplink Pilot Structure Based On CAZAC

discussion in order to satisfy people's relentless pursuit of wireless data rate so that uplink pilot sequence in this system is required more rigidly. CAZAC sequence is advised to be widely used in LTE uplink system because of its characteristics such as time/frequency constant amplitude, zero auto-correlation and good cross-correlation.Firstly, the dissertation introduced briefly the research status and goal of LTE system, especially emphasized LTE uplink SC-FDMA system. Then, on the basis of definition and characteristics of CAZAC sequences, the feasibility of CAZAC sequences being used as LTE uplink pilot sequence is studied, and a CDM pilot multiplexing structure is proposed. Stable channel estimation quality and CQI information without extra overhead for frequency domain scheduling is obtained by raising pilot power, combining frequency domain scheduling and cell edge interference, etc.. Finally, the simulation demonstrated that compared with FDM, CDM pilot is the preferred choice for SC-FDMA system.