equalization decoding of space time block codes
Báo cáo hóa học: " Research Article Performance Analysis of Space-Time Block Codes in Flat Fading MIMO Channels with Offsets" potx
Ngày tải lên :
22/06/2014, 19:20
... approximate picture of the behavior of the S-T data with large residual offset errors CONCLUSIONS We have performed a mathematical analysis of the behavior of orthogonal space- time codes with imperfect ... 2003 [8] E Ko, C Kang, and D Hong, “Effect of imperfect channel information on M-QAM SER performance of orthogonal spacetime block codes, ” in Proceedings of the 57th IEEE Semiannual Vehicular Technology ... December 2003 [12] H Cheon and D Hong, “Performance analysis of space- time block codes in time- varying Rayleigh fading channels,” in Proceedings of IEEE International Conference on Acoustics, Speech...
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The performance analysis of differential orthogonal space time block codes
Ngày tải lên :
16/09/2015, 08:30
... [10] , space- time trellis codes (STTC) [7] [11] [12], space- time concatenated codes (which include space- time turbo codes, serial concatenated codes, etc) and the layered spacetime (LST) codes ... single output SNR Signal-to-noise ratio STBC Space time block code /codes STC Space- time code /codes STTC Space- time trellis code /codes USTM Unitary Space Time Modulation xxi Chapter Introduction With ... xL1 xLNT Time Space Information Source Space Time Receiver : : : Transmit Antenna NT : : : Receive Antenna NR y11 y1N R yL1 yLN R Time Space Decoder Figure 1.1: System Block Diagram of communications...
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Báo cáo hóa học: " Research Article A Simple Differential Modulation Scheme for Quasi-Orthogonal Space-Time Block Codes with Partial Transmit Diversity" ppt
Ngày tải lên :
22/06/2014, 19:20
... matrix norm Differential decoding process The received signals for time 4t + can be written as In this part, we first consider the following new quasiorthogonal space- time block codes based on a Hadamard ... at time 4t: S4t = ij where s4t+4 represents the kth row of S4t+4 , vector m4t+4 consists of the ith and jth outputs from the “mapper” at time 3.2 2.2 Partial-diversity quasi-orthogonal space- time ... ENCODING AND DECODING Differential encoding process ij In this section, we discuss how to obtain each subblock, S4t+4 , by our simple encoding method At time interval 4t + 4, a block of 4b bits...
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Performance analysis of space time block coded systems with channel estimation
Ngày tải lên :
16/09/2015, 08:31
... development of the space- time coding concept was originally revealed in [8] in the form of trellis codes Somehow, space- time trellis codes (STTC) can be viewed as an improvement of the delay ... verifications of those models 32 Chapter BEP Performance Analysis of Orthogonal Space- Time Block Codes We present a symbol-by-symbol, channel estimation receiver for a space- time block coded system, ... OF SPACE- TIME CODING Fig 1.1: Delay Diversity and Trellis Space- Time Code (Figure partially taken from [8]) the gain of STTC is achieved at the expense of a complex receiver Since the debut of...
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On the performance and capacity of space time block coded multicarrier CDMA communication systems
Ngày tải lên :
16/09/2015, 15:54
... of space- time coding (STC) 48 Fig 2.13 Transceiver of space- time trellis code 49 Fig 2.14 Space- time trellis code with four states 51 Fig 2.15 Transceiver of space- time block ... 45 2.3 Space- Time Coding 47 2.3.1 Space- Time Trellis Codes 49 2.3.2 Space- Time Block Codes 52 2.4 Related Mathematics 55 2.4.1 Subspace Approach ... theory of space time coding [43] For complex constellations, space time block codes can be constructed for any number of transmit antennas, and again these codes have remarkably simple decoding...
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Báo cáo hóa học: " Frequency domain equalization space-time block-coded CDMA transmission system" pdf
Ngày tải lên :
21/06/2014, 00:20
... AR Calderbank, Space- time block codes from orthogonal designs IEEE Trans Inf Theory 45(5), 1456–1467 (1999) doi:10.1109/18.771146 V Tarokh, N Seshadri, AR Calderbank, Space- time codes for high ... frequency domain equalization IEEE Signal Process Mag 25(5), 37–56 (2008) 11 L Song, R de Lamare, AG Burr, Successive interference cancellation schemes for time- reversal space time block codes IEEE ... duration of two symbols A value fdT = 0.001 was assumed in all simulations The systems use Hadamard codes of length M = 16 In each run, the user codes were randomly chosen, but we avoid the use of...
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Báo cáo hóa học: " Research Article Performance of Turbo Interference Cancellation Receivers in Space-Time Block Coded DS-CDMA Systems" pot
Ngày tải lên :
21/06/2014, 23:20
... turbo codes The numerical results are discussed in Section 5, and Section concludes this paper TURBO SPACE- TIME CODED MIMO-CDMA SYSTEM A MIMO-CDMA system that employs turbo codes and space time block ... 2, we present the turbo space- time coded MIMOCDMA system model Section presents MMSE space- time receivers for coded MIMO-CDMA systems In Section 4, we present turbo space- time receivers that employ ... The authors of [20] use convolutional coding for error control coding and a space- time MMSE detector at the receiver end The authors of this thesis in [21] investigate the performance of IA and...
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Báo cáo hóa học: " Space-Time Chip Equalization for Maximum Diversity Space-Time Block Coded DS-CDMA Downlink " doc
Ngày tải lên :
23/06/2014, 01:20
... implement space- time chip equalization is to apply J space- time chip equalizers to recover the J transmitted space- time block coded multiuser chip sequences, then to apply space- time decoding ... that the space- time chip equalization and space- time decoding operations can be swapped, which allows us to first apply space- time decoding on Y[2i] and Y[2i + 1], then to apply two space- time chip ... modified and applied to the Space- Time Chip Equalization 745 proposed space- time coded DS-CDMA downlink scheme We consider a burst of 2I data symbol blocks The goal of the training-based method...
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Design and performance analysis of MIMO space time block coding systems over general fading channels
Ngày tải lên :
14/09/2015, 14:05
... powerful space- time codes based on different design criteria or improved search algorithms [24–37] The family of space- time codes includes space- time trellis codes (STTC) [24, 25, 27, 28] and space- time ... 1.1 MIMO Systems and Space- Time Coding 1.1.1 Background of MIMO Systems 1.1.2 Introduction to Space- Time Coding Space- Time Block Codes over General ... STBC encodes the whole block of input symbols together, 1.1 MIMO Systems and Space- Time Coding and can offer full diversity with relatively simpler design The first practical space- time block code...
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A unified approach for the performance analysis of unitary spare time block codes
Ngày tải lên :
26/09/2015, 10:51
... mathematical framework of orthogonal designs to construct space- time block codes It is shown that space- time block codes constructed in this way only exist for few sporadic value of n Subsequently, ... schemes CHAPTER IV A Unified Approach for the Performance Analysis of Unitary Space- Time Block Codes 4.1 Introduction Space- time block coding (STBC) has recently emerged as a promising technique ... 4.4.9 Space- Time- Frequency Block codes Space- Frequency Block codes (SFBC) [18] are very similar to STBC, with the main difference being that,in SFBC, the encoding technique is carried out across space...
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Báo cáo sinh học: " Performance evaluation of space-time-frequency spreading for MIMO OFDM-CDMA systems" ppt
Ngày tải lên :
18/06/2014, 22:20
... system Their spreading technique uses space- time block codes or space- time trellis codes and then uses subcarrier selectors to map signals to different OFDM frequency subcarriers Our proposed ... (WH) codes are utilized for both space and time spreading Different codes are assigned to different users The OFDM super-frame contains 16 OFDM symbols, which 16 is equal to the length of the time ... selectivity of the channel due to the inherent property of avoiding poor channel quality using the proposed space, time and frequency spreading Figure shows the Block error rate (BLER) performance of OFDM-CDMA...
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Báo cáo toán học: " Performance evaluation of space-time-frequency spreading for MIMO OFDM-CDMA systems" pptx
Ngày tải lên :
20/06/2014, 21:20
... user k from antenna i at time n 3) Time- Frequency mapping The output of the space- time spreading is then mapped in time and frequency before IFFT Figure describes the Time- Frequency mapping method ... proposed system Their spreading technique uses space- time block 20 Proposed OFDM CDMA (sim.) 2D OFDM CDMA (sim.) Proposed OFDM CDMA (theo.) 2D OFDM CDMA (theo.) 18 16 14 % 12 10 0 10 15 20 25 ... Rayleigh fading paths Walsh-Hadamard (WH) codes are utilized for both space and time spreading Different codes are 100 Proposed OFDM CDMA STF Block codes [16] SER 10−1 10−2 10−3 10−4 10 12 14...
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Báo cáo hóa học: " Research Article Power-Efficient Relay Selection in Cooperative Networks Using Decentralized Distributed Space-Time Block Coding" pptx
Ngày tải lên :
22/06/2014, 19:20
... large for all v ∈ {1, , Vn } The proof of Theorem can be done through the quite similar way used in the proof of Theorem 1; thus, it is omitted for the sake of brevity With a given power consumption ... all-select routing strategy The proof of Theorem can be done through the quite similar way used in the proof of Theorem 2; thus, it is omitted for the sake of brevity Since pout,n for each n ... resulting time overhead should be negligible when compared with the time used for the transmission of data packets PERFORMANCE ANALYSIS In this section, we illustrate the power-efficiency advantage of...
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Báo cáo hóa học: " Research Article Distributed Space-Time Block Coded Transmission with Imperfect Channel Estimation: Achievable Rate and Power Allocation" pot
Ngày tải lên :
22/06/2014, 19:20
... performance of space- time coding in the presence of channel estimation error is studied in [13– 15] In particular, closed-form expressions for the pairwise error probability (PEP) of space- time codes ... Stoica, Space- Time Block Coding for Wireless Communications, Cambridge University Press, New York, NY, USA, 2003 [5] A Maaref and S A¨ssa, “Performance analysis of orthogı onal space- time block codes ... information of distributed space- time block coded transmission in Rayleigh fading channels Specifically, we studied upper and lower bounds on the mutual information of the system when knowledge of the...
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Báo cáo hóa học: " Differential Detection of Space-Time Spreading with Two Transmit Antennas" ppt
Ngày tải lên :
22/06/2014, 22:20
... Calderbank, Space- time block codes from orthogonal designs,” IEEE Transactions on Information Theory, vol 45, no 5, pp 1456–1467, 1999 V Tarokh, H Jafarkhani, and A R Calderbank, Space- time block ... differential space- time block coding scheme,” IEEE Communications Letters, vol 7, no 11, pp 540–542, 2003 [5] S N Diggavi, N Al-Dhahir, A Stamoulis, and A R Calderbank, “Differential space- time coding ... bit instead of per symbol, the BER of QPSK will be identical to that of BPSK [17] Since 8PSK and 16QAM make less constellation space per bit than BPSK and QPSK, larger performance loss of 8PSK and...
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On space time trellis codes over rapid fading channels with channel estimation
Ngày tải lên :
14/09/2015, 17:55
... signal-to-noise ratio STBC space- time block codes STTC space- time trellis codes TDM time division multiplexing TDMA time division multiple access TPA transmit power allocation TDD time division duplexing ... concept of space- time coding by designing codes over both time and space dimensions Their original work gave the well known rank-determinant and product distance code design criteria of spacetime codes ... powerful space- time codes based on different design criteria or improved search algorithms [2], [7], [8], [9], [10], [11], [12] and [13] The family of space- time codes includes space- time trellis codes...
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Decoupled maximum likelihood channel estimator for space time block coded system
Ngày tải lên :
04/10/2015, 10:26
... approaches in the literature, including space- time block codes (STBC) [1]–[3], space- time trellis codes (STTC) [4], space- time turbo trellis codes [5] and layered space- time (LST) architectures [6] STBC, ... matrix MIMO multiple input multiple output STBC space- time block codes STTC space- time trellis codes LST layered space- time USTM unitary space- time modulation CSI channel state information DEML ... Contributions of the thesis 1.3 Organization of the thesis CHAPTER 2: OVERVIEW OF SPACE- TIME CODING 2.1 Diversity Techniques 2.2 Space- Time Coding 2.3 Space- Time Block Coding CHAPTER 3: OVERVIEW OF BLIND...
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Báo cáo hóa học: " Research Article Diversity Analysis of Distributed Space-Time Codes in Relay Networks with Multiple Transmit/Receive Antennas" pot
Ngày tải lên :
22/06/2014, 19:20
... “Distributed space- time coding in wireless relay networks,” IEEE Transactions on Wireless Communications, vol 5, no 12, pp 3524–3536, 2006 [6] Y Chang and Y Hua, “Application of space- time linear block codes ... H ∗ (18) Proof The proof is omitted since it is the same as the proof of Theorem in [5] As both H and RW are known at the receiver, sphere decoding can be used to perform the ML decoding in (17) ... eigenvalues of (1/R)G∗ G in this section The following theorem has been proved Y Jing and B Hassibi PDF of λmax of Wishart matrix 2.5 0.8 Pr (λmax < λ) Pr (λmax = λ) CDF of λmax of Wishart matrix...
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Báo cáo hóa học: " Full-Rate Full-Diversity Linear Quasi-Orthogonal Space-Time Codes for Any Number of Transmit Antennas" ppt
Ngày tải lên :
23/06/2014, 01:20
... bounds of rates of complex orthogonal space- time block codes, ” IEEE Transactions on Information Theory, vol 49, no 10, pp 2788–2796, October 2003 H El Gamal and M O Damen, “Universal space- time ... transmission of one code block Since P > M, the code is not delay optimal in this case 3.4 Decoding While (16) implies that performance of a ML decoder will be the same as that of ML decoding of each ... Quasi-Orthogonal Space- Time Codes The issue of smaller code rate (less than one symbol per channel use) for complex orthogonal designs has been addressed in recent times by the design of quasi-orthogonal codes...
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