Mimo Ofdm Thesis Report

The change in parameter is analyzed to improve the performance.It is compared with other broad band technologies such as 3G, WCDMA, HSPA, Wi Fi, LTE etc. CAPACITY OF MIMO SYSTEMS FOR SPACIAL CHANNEL MODEL SCENARIOS (2010)By: Dinesh Chandra Panthy Abstract: In the research process of wireless systems and in the race for the development of the new technologies, MIMO (Multiple Input, Multiple Output) is getting more attention as it uses two or more antennas at each end of a connection to send and receive data, enabling transmitter and receiver to accept signals more efficiently than with a single antenna and thus overcomes the problems and restrictions compared to the conventional system.The reduction of the computational complexity of the ZF VBLAST receiver by reducing the number of iteration is considered.

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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.

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.

From user's perspective, high bandwidth, large throughputs, service access delay and better quality of service related parameters like paging, successful call connection rate handoff rate, call drop rate etc. This technology is near to 4G and having maximum data rates up to 100 Mbps in downlink and 50Mbps in uplink.

Technically LTE is based on Release 7 and Release 8 specifications as prescribed by 3GPP.

Peak to average power ratio (PAPR) is highly reduced in SCFDMA in comparison with OFDMA.

SCFDMA is a single carrier modulation technique and OFDMA is a multi-carrier modulation technique.

VBLAST (Vertical-Bell Labs Layered Space Time Architecture) is a special detector designed for the MIMO system.

The performance of ZF VBLAST (zero forcing VBLAST) is compared with ZF, MMSE and ML detector.


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