Title :
A noise canceller for mobile communications utilizing time-frequency analysis
Author :
Xie, Xiang ; Kuang, Jing-Ming
Author_Institution :
Dept. of Electron. Eng., Beijing Inst. of Technol., China
Abstract :
In mobile communications, speech is always polluted seriously due to the channel fading. In this paper, a speech enhancement method is developed to improve the quality of polluted speech by cancelling harsh noises. The core algorithm is referred to as time-frequency filtering. A new factor, "power barycenter", is introduced for detecting harsh noises. The simulation is performed over a standard GSM platform. The results show that the method is effective to improve the speech quality with little computational overhead.
Keywords :
cellular radio; digital simulation; fading channels; filtering theory; interference suppression; noise; radiofrequency interference; signal detection; speech enhancement; time-frequency analysis; PSD; channel fading; computational overhead; harsh noise detection; mobile communications; noise canceller; power barycenter; simulation; speech enhancement method; speech quality; standard GSM platform; time-frequency analysis; time-frequency filtering algorithm; Computational modeling; Fading; Filtering; GSM; Mobile communication; Noise cancellation; Noise level; Pollution; Speech enhancement; Time frequency analysis;
Conference_Titel :
Communications, 1999. APCC/OECC '99. Fifth Asia-Pacific Conference on ... and Fourth Optoelectronics and Communications Conference
Print_ISBN :
7-5635-0402-8
DOI :
10.1109/APCC.1999.824916
