Showing papers on "Reassignment method published in 1995"

Improving the readability of time-frequency and time-scale representations by the reassignment method

Abstract: In this paper, the use of the reassignment method, first applied by Kodera, Gendrin, and de Villedary (1976) to the spectrogram, is generalized to any bilinear time-frequency or time-scale distribution. This method creates a modified version of a representation by moving its values away from where they are computed, so as to produce a better localization of the signal components. We first propose a new formulation of this method, followed by a thorough theoretical study of its characteristics. Its practical use for a large variety of known time-frequency and time-scale distributions is then addressed. Finally, some experimental results are reported to demonstrate the performance of this method. >

Channel reassignment method and base station equipment for mobile communication

Abstract: PURPOSE: To eliminate the need of managing channel using conditions by a centralized system and to provide the concrete method of channel reassignment. CONSTITUTION: When a call setting request is generated in a base station and no free channel is found, the channel of a receiver 15 is controlled, the using channel of other than a present cell is searched and the cell using the channel is identified from a cell intrinsic code 25 in the using channel in an identification means 17. A reassignment request for the channel is sent out through a control line 18 to the base station of the identified cell. In the base station, when reassignment request signals form the control line 19 are detected in a detection means 21, a channel assignment means 22 is driven, the free channel is searched and the free channel is assigned to the communication of the channel in use.