Research And Implementation Of TD-LTE Uplink Channel Based On Android

In order to make the mobile communication more efficient, and meet the demand of greater bandwidth, the third Generation Partnership Project (i.e.,3GPP) adopted on the UTRA LTE (Long Term Evolution, LTE) research project at the end of2004. LTE technology is much more like a "revolution" of3G communication standards, than an "evolution", and it even be seen as the future of4G technology which uses frequency division multiple access (OFDM/FDMA) instead of the code division multiple access (CDMA) as a multiple access technology, and contains multiple input,multiple output (MIMO) technology and adaptive technology.LTE uses the high order modulation mode. Uplink chooses SC-FDMA, and downlink chooses OFDMA as the coded rules. According to the difference of evolution between WCDMA system and TD-SCDMA system, it can be divided into frequency division multiple access mode (FDD-LTE) and time division multiple access mode (TDD-LTE), which means that, in FDD-LTE, uplink transmission process and downlink transmission process are in the different frequency bands, and in TDD-LTE, uplink transmission process and downlink transmission process are in the same frequency band and use Guard Period (GP) to distinguish them. In order to achieve the goal of high-efficiency, high-speed communication, the research on the uplink transmission of LTE is very important.This paper studies the transfer process of TD-LTE’s uplink control channel and uplink shared channel, which can provide a reference for the future related research. The algorithms are implemented into independently processing unit, and there has an experiment system in Android platform. According to the different parameters for each processing unit, we can observe the transfer procedure intuitively. The paper analyses the processing results of each function module, verifies the correctness of the algorithm. With the aid of the experimental data, the theory of the algorithm can be demonstrated more clearly.