The technological aspects of Wi MAX standards are studied and the performance of Wi MAX physical layer is analyzed in different perspectives in physical layer on the basis of bit error rate, signal to noise ratio etc.
The performance is analyzed in different aspects such as with the variation of different modulation techniques, cyclic prefix, coding, channel models etc.
MIMO system capacity is investigated using the Spatial Channel Model (SCM), proposed by standardization bodies (3GPP-3GPP2) for third generation systems and compared this to one of the physical geometrical model i.e., One Ring channel model and to a theoretical model i.e.
independent and identically distributed (i.i.d.) model. Non line of sight (N-LOS) MIMO systems in SCM is evaluated with multipath propagation scenarios and compared with i.i.d and One-Ring channel model.
The reason behind high data rate is based on use of digital modulation schemes like QPSK, 16QAM and 64QAM.
The modulation techniques may vary with the distance of subscriber's from the transmitting station to the mobile station as well as the noise in channel and MIMO technology with different matrix combination in uplink and downlink.The good improvement in PAPR given by the present technique permits the reduction of the complexity and cost of the transmitter significantly.The pulse shaping schemes also take advantage of the frequency variations of the communication channel and can provide considerable performance gain in fading-multipath channels. STUDY AND SIMULATION OF MIMO (2009)By: Amit Khanal Abstract: Over recent years the MIMO (multiple input multiple output) has become a popular technique in wireless communication.The reduction of the computational complexity of the ZF VBLAST receiver by reducing the number of iteration is considered.The performance of various MIMO detectors is compared in terms of block error rate (BER).For simulation Rayleigh channel model has been considered with BPSK (binary phase shift keying) modulation at transmitting end. PERFORMANCE EVALUATION OF 3GPP LONG TERM EVOLUTION (2010)By: Kamal Lamichhane Abstract: Uplink and downlink modulation techniques in long term evolution (LTE) are SCFDMA and OFDMA.SCFDMA has different subcarrier mapping techniques and hence SCFDMA can be analyzed under these different subcarrier mapping techniques.The VBLAST algorithm uses iterative method to detect transmitted symbols and one transmitted symbol is detected in each iteration.Each iteration further consists of ordering, interference nulling and interference cancellation step.Turbo code as a powerful coding technique has been widely studied and used in communication system.Turbo code is implemented in forward link of CDMA 2000.