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公开(公告)号：BR9811628A
公开(公告)日：2002-01-22
申请号：BR9811628
申请日：1998-07-17
Applicant: MOTOROLA INC
Inventor： KOTZIN MICHAEL D , ROZANSKI WALTER J JR , ROHANI KAMYAR
IPC: H04L27/20 , H04B7/005 , H04B7/06 , H04B7/26 , H04J11/00 , H04J13/00 , H04L1/02 , H04B1/707 , H04B7/02
Abstract: Orthogonal transmit diversity is implemented by employing a data splitter (803) to subdivide channel information (801) into at least a first portion of bits (802) and a second portion of bits (804). Each portion is spread with its own Walsh code for eventual transmission to a mobile station via a predetermined carrier frequency. When the number of bits in the first and second portion (802, 804) are small, separate Walsh codes are used to maintain orthogonality. When the number of bits in the first and second portion (802, 804) are relatively large, a time-division multiplex transmission is used to maintain orthogonality. A controller (809) controls the subdivision of the channel information and also an interleaver (308) to further enhance the effects of the diversity transmission. Control information related to the subdivision is transmitted to the mobile station so the channel information can be accurately reconstructed prior to decoding.
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公开(公告)号：BR9911957A
公开(公告)日：2001-03-27
申请号：BR9911957
申请日：1999-06-22
Applicant: MOTOROLA INC
Inventor： ROHANI KAMYAR , AHMED MANSOOR
Abstract: In a transceiver in a wireless communications system, data is transmitted from the transceiver to subscriber units, wherein each subscriber unit has a requested transmit power and an allocated transmit power, and wherein the allocated transmit power is based upon the requested transmit power. A request for an additional power allocation is detected, wherein such additional allocation causes a total requested power to exceed a maximum transceiver power. In response, allocated transmit power is limited for a minimum number of selected subscriber units needed to reduce a total transceiver transmit power below the maximum transceiver power.
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公开(公告)号：CA2198373C
公开(公告)日：2000-07-18
申请号：CA2198373
申请日：1996-05-10
Applicant: MOTOROLA INC
Inventor： GHOSH AMITAVA , ROHANI KAMYAR
Abstract: A transmitter transmits the desired signal using a continuous duty cycle at transmission rates of less than full rate (Fig. 6). The energy used in each power control group is related to the transmission rate. By repeating the power control groups, time division diversity (Fig. 6) is provided. In the receiver, the received power control groups are analyzed and compared to several levels of energy thresholds (73, 75, 77, 79). The results of the comparisons are converted into a power control signal (74, 76, 78, 80, 81) and returned to the mobile. The mobiles are capable of selecting the appropriate bit (93) and adjusting their power (94). Alternatively, an indicator of the transmission rate can be forwarded (155) in advance of the frame. The receiver compares a power estimate with the threshold for the transmission rate indicated (166).
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公开(公告)号：FI20001265A
公开(公告)日：2000-05-25
申请号：FI20001265
申请日：2000-05-25
Applicant: MOTOROLA INC
Inventor： ROHANI KAMYAR
Abstract: A CDMA communication system (400) includes a plurality of base stations (410, 420 and 430) transmitting at least a corresponding plurality of pilot signals. A mobile station (401) in a coverage area of the system (400) receives at least one of the plurality of pilot signals and transmits a Pilot Strength Measurement Message that includes a Neighbor Set of a list of a plurality of candidate pilots for a and-off routine. A method and apparatus for determining the Neighbor Set includes finding a location of the mobile station (401) in the coverage area of system (400) and determining the list of plurality of candidate pilots in the Neighbor Set according to the location of the mobile station (401).
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公开(公告)号：GB2307147B
公开(公告)日：2000-01-19
申请号：GB9703204
申请日：1996-05-10
Applicant: MOTOROLA INC
Inventor： GHOSH AMITAVA , ROHANI KAMYAR
Abstract: A transmitter transmits the desired signal using a continuous duty cycle at transmission rates of less than full rate (FIG. 6 ). The energy used in each power control group is related to the transmission rate. By repeating the power control groups, time division diversity (FIG. 6 ) is provided. In the receiver, the received power control groups are analyzed and compared to several levels of energy thresholds (73, 75, 77, 79). The results of the comparisons are converted into a power control signal (74, 76, 78, 80, 81) and returned to the mobile. The mobiles are capable of selecting the appropriate bit (93) and adjusting their power (94). Alternatively, an indicator of the transmission rate can be forwarded (155) in advance of the frame. The receiver compares a power estimate with the threshold for the transmission rate indicated (166).
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Patent Agency Ranking
公开(公告)号：GB2307147A
公开(公告)日：1997-05-14
申请号：GB9703204
申请日：1996-05-10
Applicant: MOTOROLA INC
Inventor： GHOSH AMITAVA , ROHANI KAMYAR
Abstract: A transmitter transmits the desired signal using a continuous duty cycle at transmission rates of less than full rate (Fig. 6). The energy used in each power control group is related to the transmission rate. By repeating the power control groups, time division diversity (Fig. 6) is provided. In the receiver, the received power control groups are analyzed and compared to several levels of energy thresholds (73, 75, 77, 79). The results of the comparisons are converted into a power control signal (74, 76, 78, 80, 81) and returned to the mobile. The mobiles are capable of selecting the appropriate bit (93) and adjusting their power (94). Alternatively, an indicator of the transmission rate can be forwarded (155) in advance of the frame. The receiver compares 2 power estimate with the threshold for the transmission rate indicated (166).
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公开(公告)号：SE9700287D0
公开(公告)日：1997-01-31
申请号：SE9700287
申请日：1997-01-31
Applicant: MOTOROLA INC
Inventor： GHOSH AMITAVA , ROHANI KAMYAR
Abstract: A transmitter transmits the desired signal using a continuous duty cycle at transmission rates of less than full rate (FIG. 6 ). The energy used in each power control group is related to the transmission rate. By repeating the power control groups, time division diversity (FIG. 6 ) is provided. In the receiver, the received power control groups are analyzed and compared to several levels of energy thresholds (73, 75, 77, 79). The results of the comparisons are converted into a power control signal (74, 76, 78, 80, 81) and returned to the mobile. The mobiles are capable of selecting the appropriate bit (93) and adjusting their power (94). Alternatively, an indicator of the transmission rate can be forwarded (155) in advance of the frame. The receiver compares a power estimate with the threshold for the transmission rate indicated (166).
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公开(公告)号：CA2198373A1
公开(公告)日：1997-01-23
申请号：CA2198373
申请日：1996-05-10
Applicant: MOTOROLA INC
Inventor： GHOSH AMITAVA , ROHANI KAMYAR
Abstract: A transmitter transmits the desired signal using a continuous duty cycle at transmission rates of less than full rate (FIG. 6 ). The energy used in each power control group is related to the transmission rate. By repeating the power control groups, time division diversity (FIG. 6 ) is provided. In the receiver, the received power control groups are analyzed and compared to several levels of energy thresholds (73, 75, 77, 79). The results of the comparisons are converted into a power control signal (74, 76, 78, 80, 81) and returned to the mobile. The mobiles are capable of selecting the appropriate bit (93) and adjusting their power (94). Alternatively, an indicator of the transmission rate can be forwarded (155) in advance of the frame. The receiver compares a power estimate with the threshold for the transmission rate indicated (166).
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公开(公告)号：FR2736228A1
公开(公告)日：1997-01-03
申请号：FR9607615
申请日：1996-06-19
Applicant: MOTOROLA INC
Inventor： GHOSH AMITAVA , ROHANI KAMYAR
Abstract: A transmitter transmits the desired signal using a continuous duty cycle at transmission rates of less than full rate (Fig. 6). The energy used in each power control group is related to the transmission rate. By repeating the power control groups, time division diversity (Fig. 6) is provided. In the receiver, the received power control groups are analyzed and compared to several levels of energy thresholds (73, 75, 77, 79). The results of the comparisons are converted into a power control signal (74, 76, 78, 80, 81) and returned to the mobile. The mobiles are capable of selecting the appropriate bit (93) and adjusting their power (94). Alternatively, an indicator of the transmission rate can be forwarded (155) in advance of the frame. The receiver compares a power estimate with the threshold for the transmission rate indicated (166).
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公开(公告)号：EP1020039A4
公开(公告)日：2004-09-29
申请号：EP98935784
申请日：1998-07-17
Applicant: MOTOROLA INC
Inventor： KOTZIN MICHAEL D , ROHANI KAMYAR , ROZANSKI WALTER J JR
CPC classification number: H04B7/0671 , H04J13/0048 , H04L1/02 , H04W52/34 , H04W52/42
Abstract: Orthogonal transmit diversity is implemented by employing a data splitter (803) to subdivide channel information (801) into at least a first portion of bits (802) and a second portion of bits (804). Each portion is spread with its own Walsh code for eventual transmission to a mobile station via a predetermined carrier frequency. When the number of bits in the first and second portion (802, 804) are small, separate Walsh codes are used to maintain orthogonality. When the number of bits in the first and second portion (802, 804) are relatively large, a time-division multiplex transmission is used to maintain orthogonality. A controller (809) controls the subdivision of the channel information and also an interleaver (308) to further enhance the effects of the diversity transmission. Control information related to the subdivision is transmitted to the mobile station so the channel information can be accurately reconstructed prior to decoding.
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