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— In this paper, Tomlinson-Harashima precoding for multiple-input/multiple-output systems including multiple antenna and multiuser systems is studied. It is shown that nonlinear preequalization offers significant advantages over linear preequalization which increases average transmit power. Moreover, it outperforms decision-feedback equalization at the(More)
— In this paper we consider transmission over MIMO channels with channel state information available at the transmitter. This enables the use of precoding as well as an optimization of rate and power distribution over the parallel subchannels in the transmission system (loading). We show that spatial loading provides substantial gains and give a revised(More)
The antioxidant properties of silymarin and its flavanolignan components (silybin, silychristin and silydianin) were tested. Silymarin, silychristin and silydianin exhibit relatively good antioxidant effectiveness against phenylglyoxylic ketyl radicals and DPPH. The most effective scavengers of phenylglyoxylic ketyl radicals were silymarin and silychristin(More)
— In this paper we consider transmission over MIMO channels with channel state information available at the transmitter. This enables the use of precoding as well as an optimization of rate and power distribution over the parallel subchannels in the transmission system. We show that in the case of so-called loading, equalization by the V-BLAST algorithm(More)
—In this paper we consider transmission over MIMO channels with channel state information available at the transmitter. This enables an optimization of the rate and power distribution over the parallel subchannels in the transmission system (loading). We show that spatial loading provides substantial gains and give an algorithm to calculate the matrix(More)
The method described herein this review compares the efficiency of ultrasound irradiation in sonochemical experiments in organic solvents. This method was shown to be independent of the shape and volume of the reaction vessel. The principle of this method is based on the fact that the concentration of dissolved oxygen in the entire reaction volume during(More)
The paper describes spontaneous decomposition of D,L-2,3-diphenyltartaric acid in propane-2-ol, which takes place via radicals at ambient temperature. The primary product of the decomposition is short-living ketyl radicals of phenylglyoxalic acid, which are captured and stabilized by means of the spin trap of N-terc-butyl-alpha-phenylnitrone. The(More)
The antioxidant properties of melatonin were tested in this work by EPR technique. It was found that melatonin scavenges phenylglyoxylic ketyl radicals. Its effectiveness was 10-times lower than that of vitamin C. A new method of generation of phenylglyoxylic ketyl radicals by spontaneous decomposition of D,L-2,3-diphenyltartaric acid in propan-2-ol was(More)
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