公开(公告)号：AT522104T

公开(公告)日：2011-09-15

申请号：AT05754520

申请日：2005-06-08

Applicant: ERICSSON TELEFON AB L M

Inventor： WIGREN TORBJOERN ,  PETERS GUNNAR ,  OESTMAN THOMAS

IPC: H04W24/00 ,  H04B1/707 ,  H04W52/14

Abstract: An inherent non-observability of the thermal noise power level is circumvented by estimating an upper limit of the thermal noise power level by time evaluations. An instantaneous total received wideband power is measured in a receiver. Preferably, also an instantaneous sum of powers of all links used in the same cell is provided. A quantity (P′), preferably the difference between the instantaneous total received wideband power and the instantaneous sum of powers of all links used in the same cell, is followed (110) during a time period (TLag). A minimum value (PMIN) of that quantity is then used as an estimate of the thermal noise power level upper limit. Preferably, the time period is configured as a sliding window. An improved determination of noise rise can then be calculated and used for controlling traffic within the cell.

公开(公告)号：DE69328410T2

公开(公告)日：2000-09-07

申请号：DE69328410

申请日：1993-06-17

Applicant: ERICSSON TELEFON AB L M

Inventor： WIGREN TORBJOERN

IPC: G10L19/04 ,  G10L13/00 ,  G10L19/06 ,  G10L19/14

Abstract: A time variable spectral analysis for speech coding based upon interpolation between speech frames. A speech signal is modeled by a linear filter which is obtained by a time variable linear predictive coding analysis algorithm. Interpolation between adjacent speech frames is used in order to express a time variation of the speech signal. In addition, interpolation between adjacent frames secures a continuous track of filter parameters across different speech frames.

公开(公告)号：SE502244C2

公开(公告)日：1995-09-25

申请号：SE9401462

申请日：1994-04-28

Applicant: ERICSSON TELEFON AB L M

Inventor： WIGREN TORBJOERN ,  BERGSTROEM ANDERS ,  JANSSON FREDRIK

IPC: G10L19/005 ,  G10L25/78 ,  G10L13/00 ,  H04B1/10 ,  H04L1/00 ,  G10L9/18

Abstract: A method and apparatus for improving the decoding of audio signals is disclosed. In a receiver of a frame based radio communication system, rejected frames are concealed according to a first algorithm if the last accepted frame was a speech frame and according to a second algorithm if the last accepted frame was a frame containing background sounds.

公开(公告)号：SE9500553D0

公开(公告)日：1995-02-15

申请号：SE9500553

申请日：1995-02-15

Applicant: ERICSSON TELEFON AB L M

Inventor： WIGREN TORBJOERN

IPC: H03H21/00 ,  H04B3/23 ,  H04M1/60