Performance comparison of different modulation schemes in advanced technologies WiMAX and LTE

Relay technologies have been studied and considered in the standardization process of the next generation of MIMO system, such as LTE 8, Advance LTE 10, IEEE 802.16e, IEEE 802.16m. Presently two wireless technologies, WiMAX and LTE both based on IEEE standard, are two rival technologies, nevertheless, are technically very similar but deployment is differ. This paper introduces and compares features of two advance technologies in physical layer, and also gives performance analysis of different modulation schemes (BPSK, QPSK, and 16-QAM) in WiMAX & LTE technologies.