We consider the application of distributed space-time coding in wireless sensor networks (WSNs). In particular, sensors use a common noncoherent distributed space-time block code (DSTBC) to forward their local decisions to the fusion center (FC) which makes the final decision. We show that the performance of distributed space-time coding is negatively affected by erroneous sensor decisions caus...

In this paper, we consider a combined multiple description/Alamouti’s space-time coding for image transmission over a MIMO flat-fading wireless channel. We also propose a bit-correction scheme over description estimation for the lost description, which can correct bit errors based on the source statistical information such as variance. Simulation results show that the quality of the reconstruct...

In this paper, the performance of space-time coding scheme is investigated over Nakagami fading channels. In the first part, the performance of super-orthogonal space-time trellis code is presented while the performance of its concatenated version is presented in the second part. The concatenation coding scheme with iterative decoding involves convolutional code as the outer code and super-orth...

Multiple-Antenna wireless systems with space-time block-codes exploit channel-diversity for improving performance without loss in spectral efficiency. Up to date, most work on this area assumed that perfect channel estimates are available at the receiver so to make feasible fully-coherent decoding. However, accurate channel-estimates require long training sequences that lower spectral efficienc...

Unitary space-time modulation is known to be an efficient means to communicate over non-coherent Multiple Input Multiple Output (MIMO) channels. In this letter, differential unitary space-time coding and non-coherent space-time coding for the training based approach of Kim and Tarokh are addressed. For this approach, necessary and sufficient conditions for multi-group decodability are derived i...

Improved space–time coding for multiple-input and multiple-output orthogonal frequency division multiplexing is studied for wireless systems using QPSK modulation for four transmit and four receive antennas. A 256-state code is shown to perform within 3 dB of outage capacity (and within 2 dB with perfect channel estimation), which is better than any other published result without using iterativ...

We propose a new space–time coding scheme for the quasi-static multiple-antenna channel with perfect channel state information at the receiver and no channel state information at the transmitter. In our scheme, codewords produced by a trellis encoder are formatted into space–time codeword arrays such that decoding can be implemented efficiently by minimum mean-square error (MMSE) decision–feedb...

We apply algebraic number theoretic tools to design linear space-time constellation-rotating (ST-CR) block codes. With an arbitrary number of transmitand receive-antennas, our ST-CR designs achieve symbol/second rate and enjoy maximum diversity gains over quasi-static fading channels. When is an Euler number for mod , or, when for some positive integer , the designed ST-CR precoders also maximi...