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In this paper we consider a coded transmission over a time-invariant MIMO channel, where channel state information is present at the receiver but not at the transmitter. As basic modulation technique we apply OFDM. In addition to MC-CDM spreading techniques, we introduce a new class of spreading matrices that works both in antenna and frequency direction, referred to as Multi-Carrier Cyclic Antenna...
OFDM-MFSK is a robust noncoherent transmission scheme that is able to cope with fast fading channels. The disadvantage of OFDM-MFSK is a lower end-to-end bandwidth efficiency in comparison to other transmission schemes, such as quadrature amplitude modulation. In this paper we describe two methods, combined alphabets and extended mapping using combined alphabets, to improve the bandwidth efficiency...
Artificial neural networks (ANN) are known for their ability to solve classification and optimization tasks and have been applied in many fields of communications such as equalization and multiuser detection, among others. In this paper an analog realization of iterative threshold decoding for binary linear codes is presented. It is shown that the iterative threshold decoding algorithm matches well...
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