In this paper, we evaluate by computer simulations the throughput performance of the turbo-coded hybrid ARQ for direct sequence code division multiple access (DS-CDMA) with antenna diversity reception and Rake combining in a frequency selective Rayleigh fading channel. The effect of a range of system parameters and propagation parameters (viz., the frame length, puncturing rate, spreading facto...

Bacterial abundance, biomass, cell volume, and morphological diversity were studied in sediment samples collected from the coastal area of the eastern mid Adriatic Sea. Samples from the topmost 10 cm of sediment were taken monthly from January to December 2002. The number of bacteria varied from 3.54 x 109 cells g–1 in July to 8.08 x 109 cells g–1 in September. Biomass was lowest in May (78 μg ...

Evolutionary genetics studies the patterns and mechanisms of genetic changes underlying evolutionary change. Because biological diversity at all levels (including population, species, and ecosystem diversity) has a genetic basis and is a result of evolution, evolutionary genetics provides insight into the ultimate mechanisms creating biodiversity. Evolutionary genetics utilizes empirical tools ...

In this paper, a new low-complexity frequency-domain based technique is proposed for channel equalization and symbol detection of an Enhanced Data Rate for GSM (EDGE) cellular system, which uses 8-PSK modulation. The proposed method exploits the guard interval and tail symbols present in the EDGE slot structure and uses the tail symbols as partial Cyclic Prefix in the frequency domain equalizer...

This paper extends previous works [11[21[3] in matched filter bounds and provides a theoretical calculation of detection probability of q-ary QAM signals transmitted over the diversity reception and multipath fading IS1 channels. The matched filter bounds represent the best attainable detection performance of a particular system, which may or may not be realized with a practical system. While a...

Orthogonal frequency and code division multiplexing (OFCDM) has received large attention as a modulation scheme to realise high data rate transmission. The OFCDM system with fractional sampling (FS) is investigated. FS is a diversity scheme with a single antenna, which achieves path diversity through oversampling and parallel signal reception. However, the correlation among noise components may...

Abstract— In this paper, we propose decision feedback channel estimation (DFCE) for orthogonal frequency division multiplexing (OFDM) with space-time coded transmit diversity (STTD). Two transmit channels are simultaneously estimated by transmitting the STTD encoded pilot. To improve the tracking ability of the channel estimation against fast fading, decision feedback is also used in addition t...

This paper addresses the problem of energy detection of an unknown deterministic signal over a general fading channel model. More particularly, a closed-form mathematical expression is derived for the energy detector's probability of detection over a-# generalized fading channel with selection combining diversity reception. The derived expression can be used to study the performance of energy d...

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This work has been partially supported by the European R&D, ACTS-MOSTRAIN program. Abstract The performance Symbol-by-Symbol (SbS) AbendFritchman like combined equalizers/decoders [5] performing diversity reception and coherent detection of Trellis-CodedModulated (TCM) is analyzed for the case of fast time-variant, ISI-corrupted, Rayleigh-faded data-channels. New upperbounds for the resulting d...