Abstract: Relay technologies have been studied & 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 & LTE both based on IEEE standard, are two rival technologies nevertheless, are technically very similar but deployment is differ. This introduces and compare 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.

Keywords: BPSK, QPSK, 16-QAM, LTE 8, Advance LTE 10, IEEE 802.16e, IEEE 802.16m.