说明：  Long-Term Evolution (LTE) is a new standard specied by 3GPP for fourth generation (4G) wireless communications. LTE provides high spectral eciency, high peak data rates, short round trip time, and frequency exibility. It relies on the following technologies Orthog- onal Frequency Division Multiplexing (OFDM) and Multiple-Input and Multiple- Output (MIMO), robust channel coding, scheduling and link adaptation [1]. LTE is interoperable with widely used technologies such as GPRS, WCDMA and HSPA, and this enables mobile operators deploying LTE to provide a seamless service and multimode devices for customers. Some companies have already launched commercial LTE networks, e.g., Verizon Wireless in the United States and Vodafone in Europe. Here,the throughput of LTE physical layer in downlink transmissions is carried out. The various steps like CRC,turbo coding, code block segmentation,scrambling, modulation and precoding are also carried out.