Combining beamforming and space-time coding using noisy quantized feedback
IEEE Transactions on Communications
Recursive space-time trellis codes using differential encoding
IEEE Transactions on Information Theory
IEEE Transactions on Information Theory
Multilevel codes based on partitioning
IEEE Transactions on Information Theory
Combining beamforming and orthogonal space-time block coding
IEEE Transactions on Information Theory
A new multilevel coding method using error-correcting codes
IEEE Transactions on Information Theory
Channel coding with multilevel/phase signals
IEEE Transactions on Information Theory
Multilevel codes for unequal error protection
IEEE Transactions on Information Theory
Largest eigenvalue of complex Wishart matrices and performance analysis of MIMO MRC systems
IEEE Journal on Selected Areas in Communications
Adaptively Grouped Multilevel Space-Time Trellis Codes
Wireless Personal Communications: An International Journal
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It has been shown that when perfect or partial channel state information (CSI) is available at the transmitter, the performance and capacity of a space-time coded system can be further improved. Multilevel space-time trellis codes (MLSTTC's) are capable of simultaneously providing bandwidth efficiency, diversity improvement and coding gain with significantly reduced decoding complexity, especially for larger constellations and higher throughputs. In this paper, we present a design of combined multilevel space-time trellis codes and beam forming based on feedback from receiver, henceforth referred to as weighted multilevel space-time trellis codes (WMLSTTCs). The channel profile is used to provide a beam forming scheme that achieves the better performance by properly weighting transmitted signals. Weights are selected that matches best with a channel profile feedback from the receiver indicative of long-term characteristics of the wireless channel. WMLSTTCs provide improvement in performance of MLSTTCs.