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公开(公告)号：AU2003280391A1
公开(公告)日：2004-01-19
申请号：AU2003280391
申请日：2003-05-13
Applicant: MOTOROLA INC
Inventor： HARRISON ROBERT MARK , ROHANI KAMYAR , GUMMADI SRIKANTH
Abstract: A method for and wireless communications unit adapted for measuring transmission performance for a signal emanating from an antenna is discussed. The wireless communications unit includes a receiver for receiving the signal in a first and a second time interval to provide, respectively, a first and a second signal; and a channel processor for assessing a relative channel metric corresponding to the first and second signal, the relative channel metric indicative of the transmission performance of a transmission mode. A corresponding method and base transmitter is also arranged and adapted for adjusting a transmission mode based on measured transmission performance and includes a transmitter for sending the signal in the first and second time interval and a base channel processor for determining a channel metric corresponding to the first and second signal, the channel metric indicative of the transmission performance; the transmitter further sending a control signal corresponding to the transmission mode adjusted according to the transmission performance.
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公开(公告)号：AU2003231263A1
公开(公告)日：2003-12-19
申请号：AU2003231263
申请日：2003-05-05
Applicant: MOTOROLA INC
Inventor： ROHANI KAMYAR , LAIRD KEVIN M , AHMED MANSOOR
Abstract: A method 600 of selecting an ARQ method for retransmitting a data frame based on an accumulated signal to noise ratio (SNR) of systematic bits in the data frame at a receiving unit 508. The sending unit 500 tracks the accumulated SNR of systematic bits by using channel SNR measurement reports sent by the receiving unit 508. The method utilizes Chase combining of re-transmitted systematic bits (via Partial incremental redundancy transmissions) until the accumulated SNR of the systematic bits has reached a suitable value, and then switches to sending only parity bits (via Full incremental redundancy) in retransmissions. In addition, the method alters the allocation of resources, such as code power, to provide only that necessary for successful decoding of the transmitted frame. The sending unit 500 informs the receiving unit 508 of the type of transmission, number of the transmission and/or resource allocation associated with the data frame.
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13.发明专利
公开(公告)号：AU2002256079A1
公开(公告)日：2002-10-21
申请号：AU2002256079
申请日：2002-04-05
Applicant: MOTOROLA INC
Inventor： PAUTLER JOSEPH J , HARRISON ROBERT M , ROHANI KAMYAR
Abstract: The present invention makes it possible to increase a data rate between a transmitter and receiver using a multiple-input, multiple-output radio frequency channel. A multiple-stream, multiple-antenna receiver measures a composite channel between a multiple-antenna transmitter and a multiple-antenna receiver to produce a composite channel measurement. The receiver selects a plurality of antenna array weight sets for use in the multiple-antenna transmitter in response to the composite channel measurement, where each antenna array weight set is associated with one of multiple data streams. Information describing the plurality of antenna array weight sets for use in the multiple-antenna transmitter are then transmitted.
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公开(公告)号：DE4393250T1
公开(公告)日：1994-10-20
申请号：DE4393250
申请日：1993-06-14
Applicant: MOTOROLA INC
Inventor： ROHANI KAMYAR , ROZANSKI JUN WALTER JOSEPH
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公开(公告)号：SE9400667D0
公开(公告)日：1994-02-28
申请号：SE9400667
申请日：1994-02-28
Applicant: MOTOROLA INC
Inventor： ROHANI KAMYAR , ROZANSKI WALTER JOSEPH JR
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Patent Agency Ranking
公开(公告)号：AT357088T
公开(公告)日：2007-04-15
申请号：AT00907169
申请日：2000-02-04
Applicant: MOTOROLA INC
Inventor： WHINNETT NICHOLAS WILLIAM , CLOP OSCAR , BOIXADERA FRANCESC , KUCHI KIRAN KUMAR , ROHANI KAMYAR
IPC: H04B7/06
Abstract: In a method for wireless data communication between a base station and a subscriber unit in a wireless communication system, groups of symbols of an input data stream are commutated to produce a plurality of commutated data streams. The plurality of commutated data streams are then transformed to produce a plurality of transformed data streams. Next, each transformed data stream is spread with a selected one of a plurality of spreading codes to produce a plurality of antenna signals. Finally, each of the plurality of antenna signals is transmitted using a selected one of a plurality of spaced apart antennas, wherein the plurality of spaced apart antennas are spaced apart to provide transmit diversity. In one embodiment, the transform is a space-time transform.
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公开(公告)号：DE69833133T2
公开(公告)日：2006-07-20
申请号：DE69833133
申请日：1998-10-27
Applicant: MOTOROLA INC
Inventor： ROHANI KAMYAR
Abstract: A communication system provides wireless communication in a coverage area and includes a base station (100) and a mobile station (290). The base station (100) has a plurality of sectors (210, 220, 230, 240, 250, 260) where a corresponding plurality of pilot signals (212, 222, 232, 242, 252, 262) are transmitted. A sector (210) transmits a forward link signal (211) for communicating to the mobile station (290). The mobile station (290) transmits a reverse link signal (215) and a message signal including a list of a plurality of candidate sectors for a soft hand-off routine. A method and apparatus of determining the candidate list includes measuring reverse link signal (215) which are received at said plurality of sectors. Then, comparing reverse link signal level received at sector (210) to the reverse link signal levels received at all other sectors of said plurality of sectors (210, 220, 230, 240, 250, 260). Finally, the candidate list is determined according to a result of comparing the reverse link signal levels.
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公开(公告)号：SE521147C2
公开(公告)日：2003-10-07
申请号：SE0001928
申请日：2000-05-24
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：SE517615C2
公开(公告)日：2002-06-25
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：SE0001928D0
公开(公告)日：2000-05-24
申请号：SE0001928
申请日：2000-05-24
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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