Mazo’s concept of Faster Than Nyquist signaling is extended to pulse trains that modulate adjacent subcarriers, in a manner similar to orthogonal frequency division multiplex (OFDM) transmission. Despite pulses that are faster than the Nyquist limit and subcarriers that significantly overlap, the transmission system achieves the isolated pulse error performance. Systems with at least twice the ...

An easier force single-stage clock multiband adaptable divider with joining together P&s counter is displayed. Changed manifestation of augmented accurate single-stage clock (E-TSPC) based gap by-2/3 counter was planned utilizing pass transistor rationale, which requires stand out transistor to execute both the numbering rationale and the mode determination control. This technique has been inve...

In this paper, we consider the revenue maximization problem in auctions for dynamic spectrum access. We assume a frequency division method of spectrum sharing with a primary spectrum owner that can divide the available spectrum into sub-bands and sell them to secondary users. We assume that a secondary user’s utility function is linear in the rate it can achieve by using the spectrum. We presen...

Phase noise (PN) can cause severe link performance degradation in orthogonal frequency division multiplexing (OFDM) systems. In this work, we propose an efficient PN mitigation algorithm where the PN statistics are used to obtain more accurate channel estimates. As opposed to prior PN mitigation schemes that assume perfect channel information and/or require abundant reference symbols, the propo...

In this paper, we investigate different antenna diversity concepts, which can be easily applied to orthogonal frequency division multiplexing (OFDM) systems. The focus is on standard compatibility, i.e. these schemes can be implemented to already existing OFDM systems without changing the standards. The introduced diversity techniques are applied exemplarily to the DVB-T system. Bit error perfo...

We address pilot-symbol aided channel estimation (PACE) for orthogonal frequency division multiplexing (OFDM) based systems, employing multiple transmit antennas. A novel approach is presented which estimates and separates NT superimposed signals, corresponding to NT transmit antennas, by exploiting the correlation in two dimensions of the received signal. More specifically, we apply the concep...

In this paper, a unifying framework for orthogonal frequency division multiplexing (OFDM) multiuser resource allocation is presented. The isolated seeming problems of maximizing a weighted sum of rates for a given power budget P̄ and minimizing sum power for given rate requirements R̄ can be interpreted jointly in this framework. To this end we embed the problems in a higher dimensional space. Ba...

In this paper, we consider the revenue maximization problem in auctions for dynamic spectrum access. We assume a frequency division method of spectrum sharing with a primary spectrum owner that can divide the available spectrum into sub-bands and sell them to secondary users. We assume that a secondary user’s utility function is linear in the rate it can achieve by using the spectrum. We presen...