公开(公告)号：WO9832235A3

公开(公告)日：1998-09-11

申请号：PCT/SE9800034

申请日：1998-01-13

Applicant: ERICSSON TELEFON AB L M

Inventor： MANNERSTRAALE JACOB ,  ISBERG MARTIN ,  LINDQUIST BJOERN ,  CARLSSON TORSTEN ,  HAGBERG HANS ,  JAKOBSSON PETER ,  KUENKEL LARS PETER ,  GUSTAFSSON KJELL

IPC: H04B1/26 ,  H03D3/00 ,  H04B1/40 ,  H03D7/16

CPC classification number: H04B1/0057 ,  H03D3/007 ,  H04B1/005 ,  H04B1/406

Abstract: The present invention relates to a receiver device comprising a receiver (104) adapted to receive radio signals in two frequency bands (FB1, FB2). The radio signals in one of the frequency bands (FB1) constitute communication signals for a radio system (AMPS, NMT) having a certain channel spacing, whereas the radio signals of the second frequency band (FB2) constitutes communication signals for a second radio system (PCS1900, DCS1800, GSM) having a second certain channel spacing. The receiver (104) comprises two inputs (108, 11) each intended for a radio system having different frequency bands and channel spacing. For radio signals occuring on one input (108), mixing is performed from the RF range directly to the baseband frequency range. For radio signals occuring on the second input (108) the mixing from the radio frequency range to the baseband frequency range is carried out through an intermediate frequency range. Further the receiver (104) comprises an output (112) intended to deliver baseband signals for both radio systems. The output (112) is connected to a baseband unit which is common to the radio systems. In the baseband unit, among other things, lowpass filtering, detection and neighbouring channel suppression are performed on the received radio signal that has been mixed down to the baseband frequency range.

公开(公告)号：EE03502B1

公开(公告)日：2001-08-15

申请号：EEP9900323

申请日：1998-01-13

Applicant: ERICSSON TELEFON AB L M

Inventor： LINDQUIST BJOERN MARTIN GUNNAR ,  CARLSSON TORSTEN JOHN ,  KUENKEL LARS PETER ,  MANNERSTRAALE JACOB ,  ISBERG MARTIN ,  HAGBERG HANS ,  JAKOBSSON PETER ,  GUSTAFSSON KJELL BERTHOLD

IPC: H03D3/00 ,  H04B1/40 ,  H04B1/26 ,  H03D7/16

Abstract: The present invention relates to a receiver device comprising a receiver (104) adapted to receive radio signals in two frequency bands (FB1, FB2). The radio signals in one of the frequency bands (FB1) constitute communication signals for a radio system (AMPS, NMT) having a certain channel spacing, whereas the radio signals of the second frequency band (FB2) constitutes communication signals for a second radio system (PCS1900, DCS1800, GSM) having a second certain channel spacing. The receiver (104) comprises two inputs (108, 11) each intended for a radio system having different frequency bands and channel spacing. For radio signals occurring on one input (108), mixing is performed from the RF range directly to the baseband frequency range. For radio signals occurring on the second input (108) the mixing from the radio frequency range to the baseband frequency range is carried out through an intermediate frequency range. Further the receiver (104) comprises an output (112) intended to deliver baseband signals for both radio systems. The output (112) is connected to a baseband unit which is common to the radio systems. In the baseband unit, among other things, lowpass filtering, detection and neighbouring channel suppression are performed on the received radio signal that has been mixed down to the baseband frequency range.

公开(公告)号：EE9900323A

公开(公告)日：2000-02-15

申请号：EEP9900323

申请日：1998-01-13

Applicant: ERICSSON TELEFON AB L M

Inventor： LINDQUIST BJAERN MARTIN GUNNAR ,  CARLSSON TORSTEN JOHN ,  KUENKEL LARS PETER ,  MANNERSTRAALE JACOB ,  ISBERG MARTIN ,  HAGBERG HANS ,  JAKOBSSON PETER ,  GUSTAFSSON KJELL BERTHOLD

IPC: H03D3/00 ,  H04B1/40 ,  H04B1/26 ,  H03D7/16

Abstract: The present invention relates to a receiver device comprising a receiver (104) adapted to receive radio signals in two frequency bands (FB1, FB2). The radio signals in one of the frequency bands (FB1) constitute communication signals for a radio system (AMPS, NMT) having a certain channel spacing, whereas the radio signals of the second frequency band (FB2) constitutes communication signals for a second radio system (PCS1900, DCS1800, GSM) having a second certain channel spacing. The receiver (104) comprises two inputs (108, 11) each intended for a radio system having different frequency bands and channel spacing. For radio signals occurring on one input (108), mixing is performed from the RF range directly to the baseband frequency range. For radio signals occurring on the second input (108) the mixing from the radio frequency range to the baseband frequency range is carried out through an intermediate frequency range. Further the receiver (104) comprises an output (112) intended to deliver baseband signals for both radio systems. The output (112) is connected to a baseband unit which is common to the radio systems. In the baseband unit, among other things, lowpass filtering, detection and neighbouring channel suppression are performed on the received radio signal that has been mixed down to the baseband frequency range.