A novel frequency domain equalizer for single carrier modulation is presented. It performs as a decision feedback equalizer (DFE) with the feedforward operating in the frequency domain, and a feedback filtering in time domain. The new scheme makes use of a data block transmission format which can be seen as a generalization of the zero padded transmission. Performance comparisons between FD-DFE...

In this paper, we derive the Cramér-Rao bound (CRB) for blind channel estimation in redundant block transmission systems, a lower bound for the mean squared error of any blind channel estimators. The derived CRB is valid for any full-rank linear redundant precoder, including both zero-padded (ZP) and cyclic-prefixed (CP) precoders. A simple form of CRBs for multiple complex parameters is also d...

Illusory continuity is known as a psychoacoustical phenomenon in hearing; i.e. an intermittent pure tone may be perceived as if it was continuous, when it is padded with enough large white noise. There are many researches related to this issue in monaural listening. It is said that such illusory continuity is observed when there is no evidence of discontinuity and level of the white noise is la...

Numerical methods in sparse linear algebra typically rely on a fast and efficient matrix vector product, as this usually is the backbone of iterative algorithms for solving eigenvalue problems or linear systems. Against the background of a large diversity in the characteristics of high performance computer architectures, it is a challenge to derive a cross-platform efficient storage format alon...

In the class of systems with linear precoder and zeroforcing (ZF) DFE for zero-padded MIMO frequency selective channels, existing optimal transceiver designs present two major drawbacks. First, the optimal system requires a large number of bits to encode the full precoding matrix. Second, the full precoding matrix leads to complex computations. These disadvantages become more severe as bandwidt...

Carpal flexural deformity was determined in a total of 31 puppies, of which 28 were brought to our clinic, and 3 were reported by a practicing veterinary surgeon. Ages of the puppies ranged between 6–24 weeks. The dogs belonged to 10 different breeds. Following clinical and radiological examination of the puppies, blood samples were taken and calcium (Ca), phosphorus (P) and magnesium (Mg) valu...

In this paper, we formally prove that padding the plaintext with a random bit-string provides the semantic security against chosen plaintext attack (IND-CPA) for the McEliece (and its dual, the Niederreiter) cryptosystems under the standard assumptions. Such padding has recently been used by Suzuki, Kobara and Imai in the context of RFID security. Our proof relies on the technical result by Kat...

This paper studies countermeasures to traffic analysis attacks. A common strategy for such countermeasures is traffic padding. We consider systems where payload traffic may be padded to have either constant inter-arrival times or variable inter-arrival times for their packets. The adversary applies statistical recognition techniques to detect the payload traffic rates and may use statistical me...

There are no commonly-agreed mathematical models for the inputoutput relationship of underwater acoustic channels. For each path in a time-varying multipath channel within a short period of time (e.g., one short data block), this paper proposes to use one polynomial to approximate the amplitude variation and another polynomial up to the first order to approximate the delay variation within a bl...

Orthogonal Frequency Division Multiplexing (OFDM), a promising technique to support high-bit-rate wireless systems, is limited by potentially large Peak-to-Average Power ratio (PAR) and Intercarrier Interference (ICI) due to frequency offset errors. Several techniques proposed in the literature treat these limitations as two separate problems. This paper shows that a simple adaptive modulation ...