Research On PUCCH Received Algorithm In LTE System And Its DSP Implementation

The fourth generation mobile communication technology 4G LTE adopts OFDM transmission scheme,advanced multi-antenna technology and full packet-switched domain,providing greater system capacity,higher data rate and lower delay.LTE support FDD and TDD full duplex modes,that is,operation in both paired and unpaired spectra with a better spectrum flexibility and utilization.As a single global accepted radio access technology with lower system complexity,LTE saves substantial cost of users and operators and accelerates its worldwide commercial deployment process,has become the dominant mobile access technology at the end of 2017.LTE.and its subsequent evolution versions have been the significant research object of current mobile communication technology.In LTE system,PUCCHs are divided into different formats according to different control information.This paper focus on the baseband processing of PUCCHs,multi-user detection algorithm and its DSP implementation.In this thesis,the technical background of LTE is firstly introduced.According to the 3GPP LTE physical layer protocols,the author analyzed key technology of PUCCH and constructed the Tx and Rx simulation link of PUCCH,including channel coding and modulation of uplink L1/L2 control information,resource reuse and mapping,SC-FDMA baseband signal generation,etc.In Rx,the design of multi-user received detection algorithm is divided into some modules: the resources dereuse module utilize the characteristics of coprocessor of DSP platform;an improved LS channel estimation algorithm is designed according the specific pilot structure of PUCCH;a novel PUCCH SINR measurement algorithm is introduced,which can slove the shortcoming of the existing algorithm and apply to all PUCCH formats.Finally,the author introduced the hardware resources of BSC9132 platform,and gave the implementation of PUCCH received algorithm in BSC9132,including its overall design architecture,scheduling mechanism and key functions.The accuracy and real-time performance of the DSP platform algorithm were verified by multiple testing cases.