We formulate the random coding exponent for single and multiple antennae systems on a flatfading additive white Gaussian noise (AWGN) channel with differential encoding and multiple-symbol differential detection (MSDD). Noting the intractability of the computation of the exponent for code lengths of interest, we propose the use of an approximated channel model based on the fact that the observa...

In this contribution, Cramer-Rao lower bound (CRLB) for signalto-noise ratio (SNR) estimation from linear modulation signals over flat Rayleigh fading channel is addressed. Therefore, we derive the analytical expressions of Fisher information matrix entries that assess the optimal variance of any unbiased SNR estimator. Based on statistical Monte Carlo computing method, simulation results are d...

We introduce a sensitive test of memory effects in successive events. The test consists of a combination K of binary correlations at successive times. K decays monotonically from K = 1 for uncorrelated events as a Markov process; whereas memory effects provide a temporal window with K > 1. For a monotonic memory fading, K < 1 always. Here we report evidence of a K > 1 temporal window in cogniti...

Capacity estimation in a code-division multiple-access system is closely related to power control schemes, which complicates the analysis due to the interaction between the signal power and the interference from other users and from other paths. For a signal-to-interference ratio (SIR)-based power control scheme, most previous work has been restricted to a single-cell system or to a multiple-ce...

Using linear acoustics the emitted and scattered ultrasound field can be found by using spatial impulse responses as developed by Tupholme and Stepanishen. The impulse response is calculated by the Rayleigh integral by summing the spherical waves emitted from all of the aperture surface. The evaluation of the integral is cumbersome and quite involved for different aperture geometries. This pape...

The main principle of RAKE receiver is that they exploit multipath propagation by receiving the multipath components of the transmitted signal separately and combining their energies. The complete design, for this purpose, can be segmented into distinct stages or blocks based on their functionality. The incoming data is fed to different fingers after different delays. In each finger the data is...

Pilot Symbol Assisted Modulation (PSAM) channel estimation techniques over Rayleigh fading channels have been analysed in recent years. Fluctuations in the Rayleigh fading channel gain degrades the performance of any modulation scheme. This paper develops and analyses a PSAM Polynomial interpolation technique based on Least Square (LS ) approximations to estimate the Channel State Information (...

Minimum mean square error frequency-domain equalization (MMSE-FDE) can achieve a good performance in the case of single-carrier (SC) transmission in a frequencyselective fading channel. The conventional FDE requires the insertion of guard interval (GI) to avoid the inter-block interference (IBI). However, the GI insertion reduces the throughput. Recently, overlap FDE which requires no GI insert...

into the second category of estimators which exploit OFDM sigThis work considers the problem of jointly estimating symbol frame boundaries and camer frequency offsets for orthogonal frequency division multiplexed (OFDM) communications in frequency selective fading environments. Orthogonality between the modulated and virtual carriers over an interference free window of the received signal is us...