Results 251 to 260 of about 17,862,234 (285)

Space–time trellis codes for MSK

Computers & Electrical Engineering, 2005
This paper presents four-state and eight-state space-time minimum shift keying (MSK) trellis codes with full-rate and full-diversity. Codes with two and three transmit antennas are proposed for small and large diversity orders and simulated on a quasi-static Rayleigh fading channel when the numbers of received antennas are one and four.
openaire   +3 more sources

Space Time Coding with Unequal Modulations

2008 IEEE Wireless Communications and Networking Conference, 2008
Use of unequal modulation schemes in a system utilizing space time block coding is investigated. Employing mixed modulations in a space-time system offers finer granularity in the system performance without the receiver complexity increase associated with a larger set of modulation formats.
Afshin Haghighat, Jonathan Tung
openaire   +1 more source

A GRASP for unitary space-time codes

GLOBECOM '05. IEEE Global Telecommunications Conference, 2005., 2005
Unitary space-time codes perform well at high signal-to-noise ratios on MIMO channels even when the propagation coefficients between transmitter and receiver are unknown. One method of constructing unitary space-time constellations uses a random search to find signal constellations that minimize the maximum pairwise correlation between transmitted ...
Adam Panagos, Kurt L. Kosbar
openaire   +2 more sources

Spherical space-time codes (SSTC)

IEEE Communications Letters, 2001
We present the extension of the trellis space-time code (STC) concept to include signal mapping drawn from an N-dimensional sphere. The signal points were designed as such to increase the minimum squared distance between points in the constellation without increasing the average transmit energy. The mapping of the N-dimensional spherical constellations
John D. Terry, Juha Heiskala
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Relaxed threaded space-time codes

GLOBECOM '05. IEEE Global Telecommunications Conference, 2005., 2005
It is well-known that diversity, despite being widely used as a design criterion, may not be enough to ensure good performance of a wireless system, because the diversity factor may "kick in" at unrealistically high values of SNR. This paper proposes a new class of layered space-time codes with a new design criterion that works well in moderate SNR's ...
Mohammad Janani, Aria Nosratinia
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Space-time coding using MSK

Proceedings IEEE 56th Vehicular Technology Conference, 2003
Recent papers have shown that space-time (ST) coding using continuous phase modulation has a number of advantages relative to linear modulation, among which is its constant envelope, which allows transmission with inexpensive and power-efficient Class C amplifiers.
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Space–Time Coding

2015
In MIMO systems, diversity can be achieved by repetition coding, in which different antennas at the transmitter transmit the same information at different time slots. The space–time (ST) coding is more bandwidth-efficient coding scheme, which transmits an information symbol block in a different order from each antenna.
openaire   +1 more source

Full rate space-time turbo codes

IEEE Journal on Selected Areas in Communications, 2001
Youjian Liu, O Y Takeshita, M P Fitz
exaly  

A quasi-orthogonal space-time block code

IEEE Transactions on Communications, 2001
Hamid Jafarkhani
exaly  

Super-quasi-orthogonal space-time trellis codes for four transmit antennas

IEEE Transactions on Wireless Communications, 2005
Hamid Jafarkhani
exaly