In this paper, we present a new approach to handset identification using Support Vector Machines (SVMs) [1]. The inconsistency of audio characteristics among different handsets significantly degrades the performance of speaker recognition [2]. If a speaker recognizer can identify the handset a speaker is using, it can perform the recognition by selecting a model trained specifically on that han...

A rigorous analysis of the concept coupling manipulation utilizing two antennas suited to modern smartphone devices in talk position for voice calls is presented. By using optimum relative phase between elements, they can substantially reduce specific absorption rate (SAR) but still maintain efficiency due splitting power them and by exploiting a suitable level interelement coupling. The same a...

Studies have shown that transmit and receive diversity employing a combination of multiple transmit-receive antennas (given ideal channel state information (CSI) and independent fading between antenna pairs) will potentially yield maximum achievable system capacity. In this paper, the concept of a layered super-orthogonal turbo transmit diversity (SOTTD) for downlink directsequence code-divisio...

Handsets which are not seen in the training phase (a.k.a unseen handsets) are main sources of performance degradation for speaker identification (SID) applications in telecommunication environments. To alleviate the problem, a soft-decision a priori knowledge interpolation (SD-AKI) method of handset characteristic estimation for handset mismatch-compensated SID is proposed in this paper. The id...

This paper describes two corpora collected at Lincoln Laboratory for the study of handset transducer e ects on the speech signal: the handset TIMIT (HTIMIT) corpus and the Lincoln Laboratory Handset Database (LLHDB). The goal of these corpora are to minimize all confounding factors and produce speech predominately di ering only in handset transducer e ects. The speech is recorded directly from ...

Research has shown that handset selectors can be used to assist telephone-based speech/speaker recognition. Most handset selectors, however, simply select the most likely handset from a set of known handsets even for speech coming from an ‘unseen’ handset. This paper proposes a divergence-based handset selector with out-of-handset (OOH) rejection capability to identify the ‘unseen’ handsets. Th...

Due to the rapid development and widespread usage of various communication systems, multiband internal antennas are necessary for recent mobile handsets [1]-[3]. To meet the antenna requirement for hand-held terminal, the size reduction is one of the key requirements while maintaining the good multiband and wideband performance. Furthermore, a small intenna that can be integrated into the hands...

MIMO systems have become an essential part in many communications networks and Long Term Evolution (4G) mobile communication systems. Mobile handsets using lower band of LTE (LTE700 band) require antennas of reduced size that can be adapted to the limited space in the handset. This paper presents the design, optimization and implementation of two meandered-line PIFA antennas working as an MIMO ...

In Part I of this two-part paper, we described the effective gain characteristics of the handset diversity antenna comprising a retractable whip antenna and a built-in planar inverted F antenna (PIFA). In order to achieve a high diversity effect, the correlation between the diversity branches must be small while at the same time maintaining a high effective gain, and this is contained in this p...