The use of polarization antenna diversity techniques in mobile communications can improve system robustness against multipath fading. However, when used in asynchronous CDMA transmission, an increase in the carrier to noise ratio (CNR) does not automatically imply an increase in the received signal to noise ratio (SNR), due to the possibility of an increase in multiple access interference (MAI)...

In this work, we propose two high-rate quasiorthogonal space-time coding (STC) schemes which are designed in conjunction with the successive interference cancellation (SIC) based receiver. The symbols of the proposed STC are of judiciously designed diversity order which can be effectively exploited by the SIC based receiver to cancel interference as well as to obtain diversity gain. The propose...

This paper investigates the impact of diversity reception on the performance of Bluetooth (BT) packet transmission in wireless channels with fast fading and shadowing and in the presence of IEEE802.11g interference. In particular, selection diversity (SD) technique is considered and the adoption of this technique results in a coverage extension evaluated in the paper. We first derive a tight pa...

BACKGROUND Recent advances in laboratory information systems have largely been focused on automation. However, the phlebotomy services have not been completely automated. To address this issue, we introduced an automated reception and turnaround time (TAT) management system, for the first time in Korea, whereby the patient's information is transmitted directly to the actual phlebotomy site and ...

Recently, we proposed space-time block coded-joint transmit/receive antenna diversity (STBC-JTRD) for narrow band transmission in a frequency-nonselective fading channel; it allows an arbitrary number of transmit antennas while limiting the number of receive antennas to 4. In this paper, we extend STBC-JTRD to the case of frequency-selective fading channels and propose frequency-domain STBC-JTR...

The use of diversity in the reception of mobile radio signals is well known and is implemented in most wireless systems of today. Several authors have studied polarization diversity [1{4]. However, no study has to our knowledge analyzed the e ect of the actual base station antenna characteristics on the diversity performance. In this paper we study the envelope correlation and signal strength a...

Land mobile satellite communication systems at Ka/K band (30/20 GHz) are attracting more and more attention to researchers because of its frequency band availability and the possibility of using small earth stations and satellite antennas for the systems. However, the Ka/K-band communications also give significant challenges in the system design due to severe channel impairments expected from t...