In this paper, we propose two receiving schemes for multiple antenna multi-carrier code division multiple access (MCCDMA) systems. Our proposed schemes are based on vertical Bell labs layered space-time (V-BLAST) architecture. The interference cancellation is performed serially on different sub-carriers. The channel matrices related to different sub-carriers are used in the successive interfere...

This paper proposes a novel signal scheme called “Hybrid BLAST STBC approach” this combines MIMO (multiple-input multiple-output) and STBC (space time block code) to generate a system functionally superior to MIMO and STBC systems. This paper compares and investigates the capacity of high data rate wireless local area network systems using MIMO techniques. In particular, two different algorithm...

Multiple-input–multiple-output (MIMO) systems can provide high data rate wireless services in a rich scattering environment. In this paper, we study one of the proposals for MIMO systems, the Bell Labs Layered Space-Time (BLAST) architecture. Channel estimation using training sequences is required for coherent detection in BLAST. We apply the maximum-likelihood channel estimator and the optimal...

A 26-year-old assistant nurse was referred .from the Sungei Buloh District Hospital for investigation of anaemia in December 1980. On admission, she had marked pallor and hepatosplenomegaly. Her peripheral blood showed pancytopenia with 80% of white cells being blast cells. These blast cells were rather homogeneous in size and shape, with single poorly-defined nucleolus. Cytochemical study show...

Recently, it has been proven that employing more than one transmit antenna increases channel throughput, and different strategies have been developed in order to achieve transmit diversity advantage. Space-time codes combine coding gain with diversity gain and preserve orthogonality between antennas, whereas BLAST (Bell Labs Layered Space-Time Architecture) technology transmits different indepe...

Spatial multiplexing or BLAST (Bell Labs Layered Space-Time) and space-time block-coding (STBC) are promise approaches that exploits the MIMO channel to provide higher data rates and diversity gains with no sacrifice in bandwidth. In this work we evaluate the performance of a MIMO system that combines transmit diversity and spatial multiplexing schemes. We also propose two effective receiver st...

The ultrastructure in the beef muscle of the electro-magnetic resonance and air blast freezing during the frozen storage, and the changes in the quality characteristics after thawing were evaluated. The size of ice crystal was small and evenly formed in the initial freezing period, and it showed that the size was increased as the storage period was elapsed (p<0.05). The beef stored by the elect...

BLAST is one of the most widely used bio informatics tools; largely used in finding matching gene sequences from genome databases from an input query string (sequence). Dynamic programming and heuristic search mechanisms in BLAST can rapidly identify similar sequences (similarity matching); the performance starts to deteriorate when there is an exponential increase in the size of the data set (...

Abstract— Diagonal Bell Laboratories Layered Space-Time (DBLAST) structure offers a low complexity solution to realize the attractive capacity of Multiple-input and multiple-output (MIMO) systems. In this paper, we apply D-BLAST in orthogonal frequency division multiplexing (OFDM) systems and address the issue of channel estimation. Different from other MIMO-OFDM, where symbols at all tones are...

We propose a class of layered space-time block codes (STBCs) for the quasi-static multi-input multi-output (MIMO) Rayleigh fading channel. The proposed codes use singleinput single-output (SISO) component codes based on algebraic number theory in the so called diagonal BLAST (D-BLAST) architecture. Based on a pairwise error probability analysis, we show that the diversity order of the frame err...