Concept for Combined Reduction of Acoustic Echo and Coding Noise in Digital Cellular Networks

Inhalt:
Acoustic echo cancelers in base stations of cellular networks suffer from the unpredictability of the effective echo path. A main reason of this unpredictability is the quantization in speech encoders. In order to resolve this problem, we suggest a design of network acoustic echo controllers on the basis of a statistical echo path model. In contrast to earlier work, we consider an optimization criterion which aims at the combined reduction of acoustic echo and coding noise.