公开(公告)号：DE19754204A1

公开(公告)日：1998-06-25

申请号：DE19754204

申请日：1997-12-06

Applicant: MOTOROLA INC

Inventor： BRUCKER EUGNE J ,  VILMUR RICHARD J

IPC: H04W36/00 ,  H04B7/005 ,  H04B7/26 ,  H04Q7/38 ,  G08C17/02

Abstract: A wireless communication device (100) can be handed off while operating in the slotted mode of a CDMA system. The wireless communication device (100) stores, prior to entering slotted mode, an Active Set including at least one active pilot and a Neighbor Set including a plurality of neighbor pilots. At least one receiver searcher (109) scans the at least one active pilot and at least one of the plurality of neighbor pilots prior to an assigned slot. A logic and control circuit (113) includes in the Active Set, prior to the assigned slot, at least two pilots of the at least one active pilot and the at least one of the plurality of neighbor pilots scanned prior the assigned slot. At least two of a plurality of receiver fingers (107) simultaneously monitor the Paging Channels of the at least two pilots during the assigned slot.

公开(公告)号：GB2320655A

公开(公告)日：1998-06-24

申请号：GB9723274

申请日：1997-11-05

Applicant: MOTOROLA INC

Inventor： BRUCKERT EUGENE J ,  VILMUR RICHARD J

IPC: H04W36/00 ,  H04Q7/38

Abstract: A wireless communication device is handed off while operating in a slotted mode of a CDMA system, ie the device is in an idle state and is awakened for an assigned time period or slot. The communication device 100 stores, prior to entering slotted mode, an active set including at least one active pilot transmitted by a base station, and a neighbour set including a plurality of neighbour pilots. At least one receiver searcher 109 scans the at least one active pilot and at least one of the plurality of neighbour pilots prior to an assigned slot. A logic and control circuit 113 includes in the active set, prior to the assigned slot, at least two pilots of the at least one active pilot and the at least one of the plurality of neighbour pilots scanned prior the assigned slot. At least two of a plurality of receivers simultaneously monitor the paging channels of the at least two pilots during the assigned slot. A second aspect relates to a wireless communication device for use in a slotted mode.

公开(公告)号：GB2320654A

公开(公告)日：1998-06-24

申请号：GB9723273

申请日：1997-11-05

Applicant: MOTOROLA INC

Inventor： BRUCKERT EUGENE J ,  VILMUR RICHARD J

IPC: H04B1/7117 ,  H04W36/00 ,  H04Q7/38

Abstract: A wireless communication device is handed off while operating in a slotted mode of a CDMA system, ie the device is in an idle state and is awakened for an assigned time period or slot. The communication device comprises a receiver searcher 109 which measures the received signal strength of an active pilot transmitted by a base station prior to the assigned slot and the signal strength of neighbour pilots during an assigned slot. Receivers 107 demodulate a paging channel of the active pilot during an assigned slot and a receiver searcher simultaneously determines the signal strength of other pilots. A hot neighbour list is used to prioritise the order in which the neighbour pilots are scanned. A logic and control circuit 113 determines if neighbour pilots should be scanned beyond the assigned slot, if the hot neighbour list should be modified, and if the wireless communication device should be handed off to another pilot.

公开(公告)号：GB2318952A

公开(公告)日：1998-05-06

申请号：GB9720012

申请日：1997-09-22

Applicant: MOTOROLA INC

Inventor： VILMUR RICHARD J

IPC: H04B1/7093 ,  H04B7/26 ,  H04Q7/38

Abstract: In a CDMA communication system using pseudorandom noise (PN) codes, a radiotelephone 104 has a receiver searcher 114 comprising at least one matched filter 128 for detecting the pilot signals of all nearby base stations 102. Pilot signals spread with PN sequences are detected by comparison in the matched filter with predetermined PN sequences stored in the radiotelephone. The matched filter provides a response signal when a match is found. A controller 116 identifies the strongest pilot signal and initiates communication with the corresponding base station. The controller identifies each signal and assigns fingers 122, 124, 126 of a rake receiver to the strongest received signals. These may be from different base stations or multipath signals from the same base station. The matched filter provides fast acquisition of pilot signals by the receiver searcher thus improving performance of initial system acquisition, idle mode and soft handoff.

公开(公告)号：HK32597A

公开(公告)日：1997-03-27

申请号：HK32597

申请日：1997-03-20

Applicant: MOTOROLA INC

Inventor： VILMUR RICHARD J ,  METROKA MICHAEL P

IPC: H04B1/40 ,  H03G3/20 ,  H04B1/04 ,  H04B7/005 ,  H04B7/216 ,  H04B7/26 ,  H04J13/00 ,  H04M11/00 ,  H03G3/00

Abstract: The power control apparatus of the present invention is comprised of a local oscillator signal path coupled to a mixer (106) through a variable attenuator (107) and an IF signal path coupled to the mixer (106) through two variable attenuators (108 and 109) coupled in series. The IF signal path attenuators (108 and 109) are controlled by digital control circuitry (111) while the local oscillator path attenuator (107) is controlled by the control circuitry through a level shifter (110). The power level of the signal generated by the mixing of these two signals is less than the conducted output of the radiotelephone's power amplifier.

公开(公告)号：SG33521A1

公开(公告)日：1996-10-18

申请号：SG1995001453

申请日：1995-09-29

Applicant: MOTOROLA INC

Inventor： BRUCKERT EUGENE J ,  VILMUR RICHARD J

IPC: H04Q7/38

公开(公告)号：CA1308362C

公开(公告)日：1992-10-06

申请号：CA612604

申请日：1989-09-22

Applicant: MOTOROLA INC

Inventor： VILMUR RICHARD J ,  BARLO JOSEPH J ,  GERSON IRA A ,  LINDSLEY BRETT L

IPC: H04B1/10 ,  H04B15/00

Abstract: An improved noise suppression system (800) is disclosed which performs speech quality enhancement upon the speech-plus-noise signal available at the input (205) to generate a clean speech signal at the output (265) by spectral gain modification. The improvements of the present invention include the addition of a signal-to-noise ratio (SNR) threshold mechanism (830) to reduce background noise flutter by offsetting the gain rise of the gain tables until a certain SNR threshold is reached, the use of a voice metric calculator (810) to produce more accurate background noise estimates via performing the update decision based on the overall voice-like characteristics in the channels and the time interval since the last update, and the use of a channel SNR modifier (820) to provide immunity to narrowband noise bursts through modification of the SNR estimates based on the voice metric calculation and the channel energies.

公开(公告)号：FI863169A

公开(公告)日：1986-08-04

申请号：FI863169

申请日：1986-08-04

Applicant: MOTOROLA INC

Inventor： PUHL LARRY CHARLES ,  VILMUR RICHARD J

IPC: H04M1/60 ,  H04B20060101 ,  H04B3/20 ,  H04B3/23 ,  H04M20060101 ,  H04M1/00 ,  H04M9/08 ,  H04M

Abstract: This description is of a completely bi-directional loudspeaker telephone which uses matching filters and has applications in radio telephone systems. For suppressing the reconnection echo in a received acoustic signal, a representation of the reception signal generated via an A/D transformer 601 and a matching filter 301 by a summation unit 303 is subtracted from the transmission signal which is generated by the microphone 115 of the loudspeaker telephone. The coefficients for representation of the reception signals of the matching filter utilized in the matching filter 301 for reception signals are modified, when the reception signal is detected in a land-based signal detector 225. In order to suppress electronic echo in the transmission signal in the same way, a representation of the transmission signal generated via an A/D transformer 605 and a matching filter 305 by a summation unit 307 is subtracted from the reception signal. The coefficients for representation of the transmission signals of the matching filter utilized in the matching filter 305 for transmission signals are modified, when the transmission signal is detected.

公开(公告)号：BR9705310A

公开(公告)日：2001-03-20

申请号：BR9705310

申请日：1997-10-27

Applicant: MOTOROLA INC

Inventor： VILMUR RICHARD J

IPC: H04B1/7093 ,  H04B7/26 ,  H04Q7/38 ,  H04Q7/32

Abstract: Performance of a radiotelephone (104) in a CDMA communication system (100) is enhanced using a receiver searcher (114) that includes a matched filter (128) to capture the pilot energies of all receivable transmissions from a base station (102) and other nearby base stations. A detected PN sequence is compared with a predetermined PN sequence stored at the radiotelephone (104). The predetermined PN sequence includes, for example, the last 512 chips in the short PN sequence used for spreading the in-phase channel and the quadrature-phase channel.

公开(公告)号：GB2343814B

公开(公告)日：2000-06-21

申请号：GB0004205

申请日：1996-11-20

Applicant: MOTOROLA INC

Inventor： BRUCKERT EUGENE J ,  VILMUR RICHARD J

IPC: H04B7/08 ,  H04Q7/38