please help me out soon within 12 hrs as i have to attend an exam please help me out.. ....etc

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Abstract
Improved space time coding for multiple-input and multiple-output orthogonal frequency division multiplexing is studied for wireless systems using QPSK modulation for four transmit and four receive antennas. A 256-state code is shown to perform within 3 dB of outage capacity (and within 2 dB with perfect channel estimation), which is better than any other published result without using iterative decoding. ....etc

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Introduction
Wireless mesh networks (WMN) have become increasingly popular in the last couple
of years due to advantages like low setup cost, easy network maintenance, robustness
and reliable service coverage and technology-independence . In WMNs, each node
acts both as a host and a router, forwarding packets on behalf of other nodes, provided
that the nodes are in range of one another. This property can be exploited to extend
wireless connectivity in hard-to-reach locations .
1.1 Motivation
Outdo ....etc

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The difference between FDMA, CDMA and TDMA
I think one of the most fundamental questions in our minds is What the difference is between telecom technologies, which said company focusing on machines about people? Right? They say the company focusing on machines about CDMA, TDMA, FDMA! We know that these technologies are different, but we are genearlly not able to understand the difference, making them! We believe that it is too technical and stop yourself from getting into it! Right? Guys, trust me, understanding the difference between the techn ....etc

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Prepared by:
Khaizuran Abdullah
Zahir M. Hussain


Abstract

Comparative studies on DWT-OFDM and FFTOFDM systems are presented. The model for DWT-OFDM includes zero-padding and vector transpose for transmitting the OFDM signal. MATLAB simulation commands are also described. The discrete wavelet transform-OFDM (DWT-OFDM) has to satisfy the orthonormal bases and the perfect reconstruction properties to be considered as wavelet transform. Different wavelet families have been used and compared with the conventional F ....etc

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Error while running this code

function X = tdma(A,B,C,D)
%TriDiagonal Matrix Algorithm (TDMA) or Thomas Algorithm
% A_i*X_(i-1) + B_i*X_i + C_i*X_(i+1) = D_i (where A_1 = 0, C_n = 0)
% A,B,C,D are input vectors. X is the solution, also a vector.

% Copyright 2013 The MathWorks, Inc.

Cp = C;
Dp = D;
n = length(A);
X = zeros(n,1);
% Performs Gaussian elimination
Cp(1) = C(1)/B(1);
Dp(1) = D(1)/B(1);
for i = 2:n
Cp(i) = C(i)/(B(i)-Cp(i-1)*A(i));
Dp(i) = (D(i)-Dp(i-1)*A(i))/(B(i)-Cp(i-1)*A(i));
end
% Backward substitution, s ....etc

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By
JOSHI G



Abstract

The demand for high-speed mobile wireless communications is rapidly growing.
OFDM technology promises to be a key technique for achieving the high data capacity and spectral efficiency requirements for wireless communication systems of the near future. This work presents an investigation into methods for maximizing the spectral efficiency of Orthogonal Frequency Division Multiplexing (OFDM) systems. The current standards such as IEE 802.11a in USA and H ....etc

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:angel::)
Are you looking for tabular difference between sdma tdma fdma cdma
yes looking for tabular difference between sdma tdma fdma cdma
....etc

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what is the main difference between cdma and ofdm system?
which one is better cdma or ofdm?what are the applications of both two? ....etc

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i wan this chart for reference.i want make the presentation on the basis of tdma cdma and fdma ....etc

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