Feature selection is an important issue in many research areas. There are some reasons for selecting important features such as reducing the learning time, improving the accuracy, etc. This thesis investigates the performance of combining support vector machines (SVM) and various feature selection strategies. The first part of the thesis mainly describes the existing feature selection methods a...

Radio Frequency Identification (RFID) systems operating in the Ultra High Frequency (UHF) band, are exposed to fading. While state-of-the-art RFID systems employ multiple antennas, with random selection of a single receive path to obviate the performance losses, this paper proposes to employ antenna diversity by the combination of all paths applying maximal ratio combining. An experimental perf...

The performance of a cooperative diversity with selection combining is analyzed in Rayleigh fading channels. The effect of limited power at the relay node is also presented. Our results show that when the average signal-to-noise ratio (SNR) of each branch is identical, the single relay cooperative diversity with selection combining provides 13.5 dB power gain over the non-cooperative system at ...

Macrodiversity system with macrodiversity selection combining (SC) receiver and two microdiversity SC receivers is considered. Received signal is affected simultaneously to Gamma long term fading and Rician short term fading resulting in system performance degradation. Macrodiversity SC receiver reduces Gamma shadowing effects and microdiversity SC receivers reduce multipath fading effects on b...

The performance of an underlay cognitive (secondary) dual-hop relaying system with multiple antennas and hardware impairments at each transceiver is investigated. In particular, the outage probability of the end-to-end (e2e) communication is derived in closed-form, when either transmit antenna selection with maximum ratio combining (TAS/MRC), or TAS with selection combining (TAS/SC) are establi...

Most of the software companies need to deal with vast number of software bugs day to day. This paper can be viewed as an application of instance selection and feature selection in bug repositories. The aim is to address the problem of data reduction for bug triage, and to reduce the scale and improve the quality of bug data. This can be achieved by combining instance selection with feature sele...

An expression for the probability distribution function (pdf) of the signal to noise ratio of a selection combining receiver in two wave with diffused power[TWDP] fading channel using Legendre polynomial is derived. Different power and rate adaptation techniques available in the literature have been considered in these analyses. Using this pdf expression, the capacity for different adaptive tra...