Abstract: The invention relates to a handover method and a method for selecting a base station for connecting a multimode terminal (PP/MS) in a mobile communication system which consists of at least one first base station (BTS) and at least one second base station (FRP) controlled by a MSC, and multimode terminal (PP/MS). The handover method comprises recognizing the poor radio connection between the serving second base station (RFP) and the multimode terminal (PP/MS), selecting one of the first base station (BTS) as the target cell for handover on the basis of the measurements carried out in the multimode terminal (PP/MS), and performing the handover.
Abstract: A polarization measuring apparatus in a mobile radio communication system which can accurately measure a polarized wave of a code division multiple access (CDMA) signal. The apparatus can measure the property of an elliptically polarized wave of a received radio wave as well as the property of a linearly polarized wave, and can measure the polarization property of the received radio wave more accurately by compensating for the error of internal radio frequency (RF) elements used for the polarization measurement and the loss on internal paths produced during the polarization measurement.
Abstract: A method is disclosed for receiving a transmitted signal in a communication system employing CDMA techniques wherein the transmitted signal includes a plurality of short codes, each of which is transmitted repetitively over a fixed period of time and where the received signal has CW interference in addition to the transmitted signal. The method includes using a Sequential Ratio Probability Test (SPRT) for detecting the presence of the short code in a plurality of time phases of the received signal by calculating a likelihood ratio for each phase. A likelihood ratio is a comparison of the signal's Probability Distribution Function (PDF) with a background noise PDF. The background noise PDF is calculated by combining in the RAKE the current short code with the input signal.
Type:
Grant
Filed:
October 8, 1999
Date of Patent:
July 2, 2002
Assignee:
InterDigital Technology Corporation
Inventors:
Faith M. Ozluturk, Alexander M. Jacques