rate reliable communications with hybrid space time codes

... differential spacetime coding in wireless relay networks,” to appear in IEEE Transactions on Communications [33] F Oggier and B Hassibi, “Cyclic distributed space- time codes for wireless networks with ... “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 ... for wireless relay networks with multipleantenna nodes,” to appear in IEEE Transactions on Signal Processing [29] T Kiran and B S Rajan, “Distributed space- time codes with reduced decoding complexity,”...

Ngày tải lên: 22/06/2014, 19:20

... quasi-orthogonal codes for achieving higher data rates [21, 22, 23, 24] The quasi-orthogonal codes were given for transmit antennas with rate 1, and transmit antennas with rate 3/4 These codes sacrificed ... Rate Full-Diversity 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 ... constraints, these codes achieve higher code rates that were hitherto not possible with orthogonal codes It was shown in [25] that performance of the above quasiorthogonal codes can be improved with constellation...

Ngày tải lên: 23/06/2014, 01:20

... distributed space- time codes with BPSK signals In Figure 5, we compare the approximate BER formula based on MGF given in (51) with the full -rate, full-diversity distributed GABBA space- time codes For ... distributed space- time codes with power allocation is studied through simulations We utilized distributed version of GABBA codes [10], as practical full-diversity distributed space- time codes, using ... GABBA space- time codes in amplify-and-forward relay networks,” IEEE Transactions on Wireless Communications, vol 8, no 4, pp 2036–2045, 2009 [11] G S Rajan and B S Rajan, “Distributed space- time codes...

Ngày tải lên: 21/06/2014, 19:20

... wireless communications, ” IEEE Journal on Selected Areas in Communications, vol 16, no 8, pp 1451–1458, 1998 [2] V Tarokh, N Seshadri, and A R Calderbank, Space- time codes for high data rate wireless ... 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 carrier offset ... Global Telecommunications Conference (GLOBECOM ’03), vol 2, pp 1114–1118, San Francisco, Calif, USA, December 2003 [12] H Cheon and D Hong, “Performance analysis of space- time block codes in time- varying...

Ngày tải lên: 22/06/2014, 19:20

... 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 transformation for four transmit antennas at time ... rotation,” IEEE Transactions on Communications, vol 51, no 3, pp 332–335, 2003 [5] W Su and X.-G Xia, “Signal constellations for quasiorthogonal space- time block codes with full diversity,” IEEE Transactions ... Sweldens, “Differential unitary spacetime modulation,” IEEE Transactions on Communications, vol 48, no 12, pp 2041–2052, 2000 [9] B L Hughes, “Differential space- time modulation,” IEEE Transactions...

Ngày tải lên: 22/06/2014, 19:20

... estimation on space- time coding performance,” IEE Proceedings -Communications, vol 152, no 3, pp 277–281, 2005 [15] P Garg, R K Mallik, and H M Gupta, “Performance analysis of space- time coding with imperfect ... for wireless communications, ” IEEE Journal on Selected Areas in Communications, vol 16, no 8, pp 1451–1458, 1998 [4] E G Larsson and P Stoica, Space- Time Block Coding for Wireless Communications, ... Calderbank, Space- time codes for high data rate wireless communication: performance criteria in the presence of channel estimation errors, mobility, and multiple paths,” IEEE Transactions on Communications, ...

Ngày tải lên: 22/06/2014, 19:20

... 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 ... 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 ... 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...

Ngày tải lên: 14/09/2015, 17:55

... favorable for ad hoc networks with randomly distributed nodes, where transmission links are built in a peer-to-peer manner Although experiment results demonstrate that space- time focusing transmission ... systems were presented in [23, 24] Essentially, spacetime focusing transmission in IR-UWB systems accesses the channel with a combined random time- division and random code-division scheme On ... Papanicolaou, and A J Paulraj, “Application of time- reversal with MMSE equalizer to UWB communications, ” in Proceedings of the IEEE Global Telecommunications Conference (GLOBECOM ’04), pp 3123–...

Ngày tải lên: 21/06/2014, 11:20

... the diffuse multipath components The second group of papers deals with modeling aspects and not directly with measurements As with measurements, the emphasis is to find MIMO models which properly ... between time- hopped time- reversed systems and equalization RAKE-based systems ACKNOWLEDGMENTS We would like to thank all researchers who submitted papers to this special issue and the large time ... of the papers which should make this issue a valuable archive of material on Space- Time Channel Modeling for Wireless Communications Finally, we would like to thank the Editorial Office of EURASIP...

Ngày tải lên: 21/06/2014, 22:20

... all optimal (full-rank) space- time group codes are unitary, which coincide with the secure space- time code structure found in [7] A family of complex-valued space- time codes is devised in [20] ... Introduction to SpaceTime Wireless Communications, Cambridge University Press, Cambridge, UK, 2003 [18] V Tarokh, N Seshadri, and A R Calderbank, Space- time codes for high data rate wireless communication: ... elaborate the design of this space- time code, and then its performance is characterized by a union bound on the block error probability in Section 3.2 3.1 Construction of Unitary Space- Time Codes...

Ngày tải lên: 21/06/2014, 22:20

... wireless communications, ” IEEE Journal on Selected Areas in Communications, vol 16, no 8, pp 1451–1458, 1998 [4] N Al-Dhahir, “A new high -rate differential space- time block coding scheme,” IEEE Communications ... Calderbank, Space- time codes for high data rate wireless communication: performance criteria in the presence of channel estimation errors, mobility, and multiple paths,” IEEE Transactions on Communications, ... errors on a space- time spreading CDMA system with dual transmit and dual receive diversity,” IEEE Transactions on Communications, vol 52, no 7, pp 1145–1151, 2004 J G Proakis, Digital Communications, ...

Ngày tải lên: 22/06/2014, 22:20

... deal with this problem In the eleventh paper, Senol et al propose a training-based channel estima¸ tor for space- time and space- frequency coded MIMO multicarrier systems exploiting frequency /time- multiplexed ... algorithms exploiting frequency /time- multiplexed pilots The tenth paper by Mallik and Koetter proposes a generalized multicarrier scheme for time- varying channels with modulating and demodulating ... been a professor with the ECE Department at the University of Minnesota, where he now holds an ADC Chair in wireless telecommunications His general interests span the areas of communications, ...

Ngày tải lên: 22/06/2014, 23:20

... T-algorithm with T = 1, and Fano algorithm with a threshold of dB are 1024, 512, 232, and 270 per OFDM signal, respectively In order to illustrate the performance obtained with space- time trellis codes, ... Viterbi algorithm (together with the metric given in (7)) may be used [13] In the case of space- time trellis codes, at the start of each frame (OFDM symbol) the space- time trellis encoder is assumed ... transmit antenna 2.1 Trellis shaped space- time coded OFDM with reduced PAPR The block diagram of a trellis-shaped space- time coded OFDM system is shown in Figure with nt transmit and nr receive antennas...

Ngày tải lên: 22/06/2014, 23:20

... Optimal Space- Time Decision Feedback Equalizers 3.2.1 Optimal Space- Time DFE for ARMA Channels with ARMA Noise 3.2.2 Optimal Space- Time DFE for FIR Channels with AR ... spatial and temporal domains Figure 1.7 illustrates this Single User Decoupled Space- Time Approach In space- time processing, we can decouple the space and time processing This will lead to a spatial ... decoupled, a joint space- time processing approach has performance advantages Joint space- time processing is also superior, as compared to decoupled space- time methods, when dealing with delay spread...

Ngày tải lên: 26/10/2014, 14:30

... 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 the spectacular ... [12], space- time concatenated codes (which include space- time turbo codes, serial concatenated codes, etc) and the layered spacetime (LST) codes -which include Bell Laboratories layered space- time ... training The spacetime coding techniques when the channel propagation coeffients are known at the receivers include space- time block codes (STBC) [8] [9] [10] , space- time trellis codes (STTC)...

Ngày tải lên: 16/09/2015, 08:30

... Unitary Space- Time Modulation 6.1 96 106 Unitary Space- Time Modulation 106 6.1.1 6.1.2 Unitary Space- Time Modulation 109 6.1.3 Differential Unitary Space- Time ... of Space- Time Coding 1.2.1 Simulcast 1.2.2 BLAST 1.2.3 Space- Time Trellis Codes 1.2.4 Space- Time ... unitary space- time modulation The constellations generated by the proposed simple algorithm exhibits better performance than the well-known cyclic codes In summary, in this dissertation, space- time...

Ngày tải lên: 16/09/2015, 08:31

... where λτ controls the ray arrival rate With the arrival times defined, we focus on the complex gain βk This gain has a magnitude that is Rayleigh distributed, with the expected power (or variance) ... early MIMO modeling work [31, 35, 7] and has demonstrated good agreement for systems with relatively few antennas (2 or 3) However, for systems with a large number of antennas, the Kronecker relationship ... clusters that decay exponentially with increasing delay time Intuitively, a single cluster of arrivals might correspond to a single scattering object and the arrivals within the cluster arise because...

Ngày tải lên: 07/12/2015, 01:12

... Conditioning and Selection 70.8 Space or Space- Range Adaptive Pre-Suppression of Jammers 70.9 A STAP Example with a Revisit to Analog Beamforming 70.10 Summary References Space- Time Adaptive Processing ... techniques require jammer data to be collected within a restricted region of the available space- time domain, and may not always be able to generate sufficient jammer-only data Moreover, fast-changing ... signal detection with SMI algorithm, IEEE Trans on Aerospace and Electronic Systems, AES-26, 768–773, Sept 1990 [28] Wang, H., Zhang, Y and Zhang, Q., A view of current status of space- time processing...

Ngày tải lên: 16/12/2013, 04:15

... axis, and the dimension of space along the horizontal axis [see Fig 4] Fig A phase space of cinematic spacetime Downward movement on the time axis indicates the passage of time, while movement on ... exposure time, and separated by a space that represents the time the shutter is closed during which the film is transported (for a motion picture camera with a 180 degree shutter the exposure time ... static in space and time) , a long-exposure still photograph (in which the camera moves in time but not in space) , a motion-blurred still photograph of an instant (in which the camera moves in space...

Ngày tải lên: 19/02/2014, 10:20

... split it arbitrarily into space and time, just as we can split the order of space into length, breadth and thickness But space without time is as incomplete as a surface without thickness Math Do ... time as well as space is implied in all our measures The fundamental measurement is not the interval between two points of space, but between two points of space associated with instants of time ... his separation of space and time on his own track through the world Since any separation of space and time is admissible, it is possible for the astronomer to base his space and time on the track...

Ngày tải lên: 06/03/2014, 13:20