Closed-loop schemes optimizing power allocation can be applied if Channel Status Information (CSI) is available at both transmitter and receiver. However, CSI is never ideal and algorithms performance degrades rapidly when CSI is poor. In this contribution a MMSE cost function that takes into account channel uncertainty is proposed for MIMO systems with OFDM modulation. The derived algorithm is...

Abstract — For a space-time coded system in a correlated Rayleigh fading environment, we consider two receiver structures: (1) a suboptimum one in which the imperfect channel state information (CSI) is used in place of perfect CSI in a perfect CSI optimum receiver, (2) the optimum receiver in which the imperfect CSI is used in the maximum likelihood sense. Channel estimation is done by the use ...

Conditional slantwise instability (CSI) is observed to occur in saturated, statically stable atmospheres where the horizontal wind increases in magnitude and veers with height. A complete background on CSI may be found in the compendium by Schultz and Schumacher (1999). Numerous studies in the midlatitudes (e.g. Sanders and Bosart 1985, Moore and Blakely 1988, Weismueller and Zubrick 1998) have...

We use cutoff rate to study the rateoptimal binary input distributions for use on the Rayleigh fading channel when only partial CSI is available at the receiver. First, we consider iid fading, and analyze the cutoff rate under partial CSI for BPSK and On-Off Keying (OOK) modulation. Then, we analytically determine the optimal distribution as a function of the faded SNR and the CSI quality avail...

188 CLINICAL CHEMISTRY, Vol. 33, No, 1, 1987 tion. Excellent correlations (r >0.98) were obtained between manual and Cobas methods. The derived CSI values were also highly correlated (Cobas CSI = 0.99 Manual CSI + 0.12, r = 0.93, p <0.001). Using the Cobas-Bio to determine the cholesterol saturation of bile is more economical and faster than the manual methods. By sequential lipid analysis of 5...

The CSI-Effect (Crime Scene Investigation Effect) proposes that jurors tend to acquit suspects when forensic evidence doesn’t exist (or when existing technology fails to reveal sufficient forensic evidence). This study surveyed 71 students in Computer and Information Systems-related degree programs. Specifically, the survey attempted to answer two questions: 1) Does the technology portrayed in ...

Steady-state free precession (SSFP) methods have been very successful due to their high signal and short imaging times. These properties make them good candidates for applications that intrinsically suffer from low signal such as low gamma nuclei imaging. A new chemical shift imaging (CSI) technique based on the SSFP signal formation has been implemented and applied to (31)P. The signal propert...

We address the problem of resource allocation on the downlink of an OFDMA single-cell system under fairness constraints with limited channel state information (CSI). Target QoS corresponds to a minimum user data rate, a target bit-error rate and a maximum BER-outage probability. The channel model includes path-loss, shadowing, and fading. The only available CSI is the channel average gain of ea...

This paper considers the implementation of Tomlinson-Harashima (TH) pre-coding for multiuser MIMO systems based on quantized channel state information (CSI) at the transmitter side. Compared with the results in, our scheme applies to more general system setting where the number of users in the system can be less than or equal to the number of transmit antennas. We also study the achievable aver...

BACKGROUND Although photoplethysmography and cerebral state index (CSI) have been used as indices in monitoring vital signs perioperatively, there are only a few reports comparing the performance of photoplethysmography with CSI in monitoring anaesthesia depth. The aim of the present study was to clarify features of photoplethysmography in monitoring balanced general anesthesia compared with CS...