Mimo Optimization Techniques and Their Application in Maximizing Throughput for 3GPP HSPA+

摘要

The world is going digital by the day and the need for digital data communication such as high definition video streaming, web browsing and machine to machine communication due to internet of things (IoT) are on the increase continually, such applications require high data rate to deliver them and without increase in bandwidth which is an expensive resource constant. Also in order for 3G cellular system operators to compete favorably in the mobile data market with new competing technologies such as WIMAX, LTE etc especially in the future explosive IoT market and to preserve their investment a cost effective way is to utilize the Multiple Input and Multiple Output antenna system otherwise called MIMO to obtain the needed high data rates. In this paper we looked at the various data rate optimization techniques of MIMO and their applications in 3G networks. Using a drive test we conducted investigation and compare the impact of MIMO on the throughput of legacy Rel. 99, HSDPA and HSPA+ Rel. 9. The result of our investigation shows that while Rel. 99 offered a 0.403Mbps in the uplink, HSUPA offered 1.335Mbps with HSPA+ showing a throughput of 10.950Mbps. Likewise throughput in the downlink is 0.244Mbps, 1.041Mbps and 35.370Mbps for Rel. 99, HSDPA and HSPA+ respectively showing a progressive increase as the number of transmit antenna increases at the base station.