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Coding for MIMO-OFDM in Future Wireless Systems - download pdf or read online

By Bannour Ahmed, Mohammad Abdul Matin

ISBN-10: 3319191527

ISBN-13: 9783319191522

ISBN-10: 3319191535

ISBN-13: 9783319191539

This booklet introduces the reader to the MIMO-OFDM method, in Rayleigh frequency selective-channels. Orthogonal frequency department multiplexing (OFDM) has been followed within the instant local-area community criteria IEEE 802.11a because of its excessive spectral potency and skill to house frequency selective fading. the combo of OFDM with spectral effective a number of antenna thoughts makes the OFDM an exceptional candidate to beat the frequency selective problems.

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Extra info for Coding for MIMO-OFDM in Future Wireless Systems

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The product distance for Rayleigh channel. Thus, to establish criteria for building space time codes (Fig. 2), we should evaluate the expression of the pairwise error probability. 2 ST-MIMO Channel 41 Sapce Times Codes Block Codes Treillis Codes Linear Dispersion Codes Algebraic Space Time Codes TAST Codes Orthogonal Codes DAST Codes Golden Codes Perfect Codes Fig. 2 Family tree of space time codes Let X and T are two distinct codeword. 2) where i = 1 . . n are the singular values of the matrix (X − T ) H (X − T ) and r is its rank.

X W (12)]T = Θ S12(W −1)+1 . . . S12W 1, 2, 3, 4. 6 Conclusion This chapter presents a general MIMO-OFDM system model. The analysis is carried out for the coherent scenario where the channel state information is perfectly known at the receiver. Later on, the basic issues such as code design criteria for MIMO-OFDM links with frequency-selective fading are investigated. The chapter also demonstrates the maximum achievable diversity order and coding gain of SF code. Two examples of code constructions are presented that can achieve full space-frequency diversity.

44) which is the column matrix of Φ2 and different columns Φ2 are selected for different users. It is worth noting that, according to the Theorem 1 and Theorem 2 given in [15], the coding gain expresses the simultaneous Dio1 phantine approximation of the numbers {φ01 , φ11 = θ wt , . . , φ1wt −1 = θ {φ02 1, φ12 1 ρ Q−1 , . . , φ2 Q−1 ρ wt −1 wt } and = =φ =φ } by other algebraic numbers, depending on the constellation used. This observation implies that optimizing the coding gain is equivalent to choosing these Diophantine numbers to be “badly approximated” by other algebraic number.

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Coding for MIMO-OFDM in Future Wireless Systems by Bannour Ahmed, Mohammad Abdul Matin

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