Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. Peak Power Reduction of Space-Time Coded

Abstract-This paper applies several concentration inequalities to prove concentration results for the crest factor of OFDM signals. The considered approaches are, to the best of our knowledge, new in the context of establishing concentration for OFDM signals.

In this paper, blind algorithms based on a deterministic framework are proposed for equalization of finite-memory Linear Time-Invariant (LTI) channels carrying OFDM signals. Unllke algorithms proposed to date, the channel memory is not restricted to be smaller than the cyclic prefix. It is shown

Unique word (UW-) OFDM is a novel multicarrier system that is shown to be suitable for cognitive radio systems. To construct the UW-OFDM signal, a code generation matrix is required to introduce redundancy in the frequency domain, implying that the code generation matrix must satisfy a num

Abstract—Clipping is an efficient and simple method to reduce the peak-to-average power ratio (PAPR) of orthogonal frequency division multiplexing (OFDM) signals. However, clipping causes distortion and out-of-band radiation. In this letter, a novel iterative receiver is proposed to estimate

Abstract-We consider spectrum sensing of OFDM signals in an AWGN channel. For the case of completely known noise and signal powers, we set up a vector-matrix model for an OFDM signal with a cyclic prefix and derive the optimal NeymanPearson detector from first principles. The optimal detector

In this paper, we present novel and unintuitive results related to the behaviour of non-linearly distorted OFDM signals. Particularly, we show that the error probability performance of such signals can in fact decrease as the number of OFDM sub-channels is increased.

Abstract — In a Spectrum Pooling context, Cognitive Radio nodes have to perform spectrum sensing in order to find available spectrum holes. In this paper, OFDM cyclostationarity is studied as the best detector choice to find white spaces in the spectrum. OFDM signal detection can be performed using

Abstract -We propose an EM-based algorithm to efficiently detect transmitted data in an OFDM system as well as estimating the channel impulse response (CIR). The maximum likelihood estimate of CIR is obtained by using channel statistics (their means and covariances) via the expectation

Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained