When the Alamouti code is applied (as a space-time block code) to an OFDM system with transmit diversity, the simple Alamouti decoding requires that each subchannel is flatfading and constant over two symbol periods(Alamouti codeword period). The second requirement makes the Alamouti decoding scheme not suitable for time varying channels. In this paper, we propose a new decision directed receiv...

Abstract The fuel shape and flow path structure of the plate-type reactor are different from those conventional rod-bundle reactor, which leads to difference between thermal-hydraulic phenomenon thermal conduction in rod bundle assembly. Therefore, this thesis, subchannel analysis model code applied developed. calculation results compared with simulation FLUENT MATRA experimental heat transfer ...

In this thesis, the term passive channel refers to the conventional parallel wireless channel model, where there is no control over the gain of each individual subchannel. We define an active channel as a parallel channel where by injecting power into the subchannels, somewhere between a transmitter and a receiver, the gain of the subchannels are adjusted. We herein study the problem of joint p...

The ( ) wireless information dispersal scheme (WIDS) is useful for fault-tolerant parallel wireless communications, where it can be used to tolerate up to path (subchannel) failures. This paper constructs a performance model of ( ) WIDS used in wireless communications, and proposes an algorithm to find the optimal set of ( ) with the highest reliability. This algorithm reduces the complexity of...

We apply non-binary channel coding to the symmetric multi-carrier two-way relay channel and evaluate two decoding approaches at the relay. Complete-decode-and-forward (CDF) decodes the packets of both users before forwarding the binary sum in the second phase, while functional-decode-andforward (FDF) directly decodes the binary sum of both packets. For both approaches, we study suitable subchan...

Assuming perfect channel state information at the transmitter of a Gaussian broadcast channel, strategies are investigated on how to assign subchannels in frequency and space domain to each receiver aiming at a maximization of the sum rate transmitted over the channel. For the general sum capacity maximizing solution, which has recently been found, a method is proposed that transforms each of t...