-
公开(公告)号：DK142483A
公开(公告)日：1983-03-29
申请号：DK142483
申请日：1983-03-29
Applicant: MOTOROLA INC
Inventor： LABEDZ GERALD PAUL
-
公开(公告)号：CA2192286C
公开(公告)日：2000-05-02
申请号：CA2192286
申请日：1996-12-06
Applicant: MOTOROLA INC
Inventor： LABEDZ GERALD PAUL
Abstract: Providing communications service to a coverage hole (22) in a DS-CDMA cellular communication system (50) involves an OMC (52) determining the transmitters (134-144) in adjacent cells (122-132) to the coverage hole (22). The OMC (52) places each of the transmitters (134-144) in the adjacent cells (122-132) in a power on demand mode (92). The OMC (52) then selects at least one, but less than all of the transmitters (134-144) to increase power to a pilot channel. The selected transmitter(s) is chosen base on one or more of the following factors, the transmitter's level of unused power, the interference level at the transmitter and the position of the transmitter.
-
公开(公告)号：PT95871B
公开(公告)日：1999-03-31
申请号：PT9587190
申请日：1990-11-13
Applicant: MOTOROLA INC
Inventor： LABEDZ GERALD PAUL , ATKINSON FREDERICK G , RABE DUANE C , SCHULER JOSEPH J , WERRONEN ALTON P
Abstract: A method and apparatus for diversity reception in a communication system is provided. A dual branch receiver (100, 101) is provided with a stored replica of expected reference information (104) so that correlation with received time-dispersed signals produces an estimate of the transmission channel's impulse response as seen by each branch (100, 101), and determines, among other things, phase error between the branch local oscillators (208, 209) and the time-dispersed signals. Matched filters (214, 215) are constructed which then coherently align the time-dispersed signals from each branch (100, 101) with that branch's local oscillator (208, 209) which constitutes a part of the signal equalization. A diversity processor (105) performs bit by bit selection on the re-aligned signals, maximal ratio combining of the re-aligned signals, or equal gain combining of the re-aligned signals, followed by a sequence estimation which uses similarly selected or combined channel distortion compensation parameters to complete the equalization process on the new signal.
-
公开(公告)号：BR9702182A
公开(公告)日：1999-03-16
申请号：BR9702182
申请日：1997-02-07
Applicant: MOTOROLA INC
Inventor： LABEDZ GERALD PAUL , HAMIED KHALID ABDUL-AZIZ
Abstract: A simulator/controller (113) performs real-time simulation for system control in a code-division multiple access (CDMA) wireless communication system (100). The simulator/controller (113) simulates the effects of interfering AMPS wireless communication systems which coexist with CDMA wireless communication systems and also aids in the placement of new CDMA base-stations in the presence of existing AMPS base-stations. When system parameters are input to the simulator/controller (113), real-time simulation of the CDMA wireless communication system (100) predicts potential problem areas of the CDMA wireless communication system (100) and controls the CDMA wireless communication system (100) to avoid the problems before they occur.
-
公开(公告)号：HK1000980A1
公开(公告)日：1998-05-15
申请号：HK97102628
申请日：1997-12-27
Applicant: MOTOROLA INC
Inventor： LABEDZ GERALD PAUL , RABE DUANE C
Abstract: There is provided a method of rapid Received Signal Strength Indication (RSSI) of a time-dispersed signal having echoes (D, Fig. 1C) (where the time dispersal represents a significant fraction or more of the transmitted symbol interval). It comprises a sliding correlation (304) of a received signal against a known sequence or via channel sounding to obtain the time-dispersal function of the communications channel upon which the signal is transmitted (306/307) and a summation of the squares of the quadrature components of the energies at relative maxima of the correlations (306/307) (correlation peaks determined with reference to a threshold level (305)) to integrate the energy defined by the correlation function to determine the energy present among the time-dispersed echoes utilizing the time-dispersal function. Thus, the energy present in the time-dispersed echoes is related to the received signal strength, the RSSI comprises a scalar of the energy present and the scalar comprises a function of the receiver's gain, RSSI determinations during any given interval are less dependent upon the ambulatory velocity of the receiver, and RSSI determinations of equivalent accuracy are obtained more rapidly or more accurate RSSI determinations are obtained per unit time.
-
Patent Agency Ranking
公开(公告)号：DE3855764T2
公开(公告)日：1997-07-24
申请号：DE3855764
申请日：1988-04-21
Applicant: MOTOROLA INC
Inventor： LABEDZ GERALD PAUL
Abstract: A cellular system employing time division messages transmitted from a plurality of radiators (407, 409, 411) in each cell is disclosed. A first electromagnetic signal at a particular frequency is transmitted during one time slot (903) from one of the plurality of radiators. A second electromagnetic signal at the same frequency is transmitted during another time slot (917) from a second one of the plurality of radiators. A remote unit (401,403) selects the best electromagnetic signal and communicates the selection to a cell controller (413), which selects a third time slot for transmission of a message from the radiator transmitting the best electromagnetic signal.
-
公开(公告)号：SE9701032L
公开(公告)日：1997-05-23
申请号：SE9701032
申请日：1997-03-21
Applicant: MOTOROLA INC
Inventor： LABEDZ GERALD PAUL , STEWART KENNETH
Abstract: Communication rate in a variable rate communication system is determined by calculating metrics based upon symbol energy over a traffic channel frame (200) and selecting an optimum rate based upon the calculated metrics. The metrics are calculated by selectively accumulating symbol energy, using adders (405-408) and accumulators (409-412) in response to the presence of power control groups (201) within the traffic channel frame (200), as determined by power control group selector (400).
-
公开(公告)号：FI970963A0
公开(公告)日：1997-03-06
申请号：FI970963
申请日：1997-03-06
Applicant: MOTOROLA INC
Inventor： LABEDZ GERALD PAUL , STEWART KENNETH A
Abstract: Communication rate in a variable rate communication system is determined by calculating metrics based upon symbol energy over a traffic channel frame (200) and selecting an optimum rate based upon the calculated metrics. The metrics are calculated by selectively accumulating symbol energy, using adders (405-408) and accumulators (409-412) in response to the presence of power control groups (201) within the traffic channel frame (200), as determined by power control group selector (400).
-
公开(公告)号：PT94149B
公开(公告)日：1996-12-31
申请号：PT9414990
申请日：1990-05-24
Applicant: MOTOROLA INC
Inventor： LABEDZ GERALD PAUL , RABE DUANE C
Abstract: There is provided a method of rapid Received Signal Strength Indication (RSSI) of a time-dispersed signal having echoes (D, Fig. 1C) (where the time dispersal represents a significant fraction or more of the transmitted symbol interval). It comprises a sliding correlation (304) of a received signal against a known sequence or via channel sounding to obtain the time-dispersal function of the communications channel upon which the signal is transmitted (306/307) and a summation of the squares of the quadrature components of the energies at relative maxima of the correlations (306/307) (correlation peaks determined with reference to a threshold level (305)) to integrate the energy defined by the correlation function to determine the energy present among the time-dispersed echoes utilizing the time-dispersal function. Thus, the energy present in the time-dispersed echoes is related to the received signal strength, the RSSI comprises a scalar of the energy present and the scalar comprises a function of the receiver's gain, RSSI determinations during any given interval are less dependent upon the ambulatory velocity of the receiver, and RSSI determinations of equivalent accuracy are obtained more rapidly or more accurate RSSI determinations are obtained per unit time.
-
公开(公告)号：DE68923257D1
公开(公告)日：1995-08-03
申请号：DE68923257
申请日：1989-11-23
Applicant: MOTOROLA INC
Inventor： DETTRO GREGORY J , LABEDZ GERALD PAUL , ATKINSON FREDERICK GARLAND
Abstract: In a communications system having transmissions containing certain information-of-interest (147, 149) at predetermined intervals in the transmission, there is provided a method for isolating and processing that information-of-interest. The method is characterized by sensing the start of a transmission (141) and isolating for processing as the information-of-interest, the information received about instant(s) predeterminally removed in time (145) from the sensed start of transmission (141). Thus, the information-of-interest is isolated principally on the basis of elapsed time. The method for isolating and processing that information-of-interest is further characterized by sensing (249) the start of a transmission from the received signal power of the transmission exceeding a predetermined threshold (259); AGCing the transmission (233) and attenuating the AGC'd transmission from a maximum level to a desired level before the information-of-interest is expected to arrive; isolating for processing as the information-of-interest, the information received about instant(s) predeterminally removed in time from the sensed start of transmission, by timing (263) the expected interval between the instant that the start of the transmission is sensed and the predetermined instant that the information-in-interest should arrive (whereby the information-of-interest is isolated principally on the basis of elapsed time); tagging the information (247) isolated about that instant for processing; and beginning processing (275) with information just preceeding the isolated information (whereby the reliability of the information detection is enhanced by one-to-several bits).
-
-
-
-
-
-
-
-
-
Search Results
102
records
(took 0.023 seconds)
