公开(公告)号：SG49142A1

公开(公告)日：1998-05-18

申请号：SG1996006738

申请日：1993-11-18

Applicant: QUALCOMM INC

Inventor： WEAVER LINDSAY A JR

IPC: G06F17/10 ,  G06F17/15 ,  G06F17/16 ,  H04B1/66 ,  H04L27/22 ,  H04L1/06 ,  G06F7/544

Abstract: An method and apparatus for computing a scalar projection of a vector onto another vector. The apparatus comprises a multiplying circuit and a summing circuit. The multiplying circuit is for multiplying a value representative of a first component of a first vector with a value representative of a first component of a second vector to provide a first intermediate value, and for multiplying a value representative of a second component of a first vector with a value representative of a second component of a second vector to provide a second intermediate value. The summing circuit sums the first and second intermediate values to provide a resultant value representative of the scalar projection of the first vector onto the second vector. The apparatus may further comprise a storing circuit and a selection circuit. The storing circuit is for storing the values representative of the first and second components of the first vector, and the values representative of the first and second components of the second vector. The selection circuit provides an ordered supply of these values to the multiplying circuit.

公开(公告)号：BG61745B1

公开(公告)日：1998-04-30

申请号：BG9902594

申请日：1994-09-01

Applicant: QUALCOMM INC

Inventor： TIEDEMANN EDWARD G JR ,  WEAVER LINDSAY A JR ,  KERR RICHARD J ,  GEIB KENNETH M

IPC: H04J3/16 ,  H04B1/16 ,  H04B7/26 ,  H04W24/00 ,  H04W48/08 ,  H04W52/02 ,  H04W56/00 ,  H04W72/04 ,  H04W72/12 ,  H04W74/04 ,  H04B7/24

Abstract: The method and the device can be applied in communicationsengineering, in particular in cellular communication systemshaving a transmitter and one or more receivers. They reduce thepower consumption of the receivers. This was attained when forevery receiver (122) a time interval is set during which itmonitors the transmissions, i.e. it is in an active state.Transmitter (120) trasmits messages (143) to receiver (122) onlywhen it is in an active state. In non-active state receiver (122)can perform operation which do not require any coordination withthe transmitter (120). With a power controller (147) it canexclude components used for monitoring the transmissions (146). Alittle time before the preset time for the receiver the latter(12) transmits power to these components and performsinitializations which can include the acquisition of a pilotsignal (134) from transmitter (120), by which receiver (122)synchronizes its clock signal (156) if that had not happenedduring the time of its previous non-active state.48 claims, 9 figures.

公开(公告)号：SG48018A1

公开(公告)日：1998-04-17

申请号：SG1996006209

申请日：1992-05-17

Applicant: QUALCOMM INC

Inventor： WHEATLEY CHARLES E III ,  GILHOUSEN KLEIN S ,  WEAVER LINDSAY A JR ,  BLAKENEY ROBERT D II ,  PADOVANI ROBERTO

IPC: H04J13/00 ,  H04B7/005 ,  H04B7/26 ,  H04L27/30 ,  H04W52/00 ,  H04W52/02 ,  H04W52/06 ,  H04W52/08 ,  H04W52/10 ,  H04W52/12 ,  H04W52/34 ,  H04W52/36 ,  H04W52/40 ,  H04W52/52

Abstract: A cellular communication system in which a system user and another user communicate with each other by way of information carrying spread spectrum modulated signals transmitted via a cell-site in which system: the system user comprises a transmitter for transmitting information carrying spread spectrum modulated signals to said cell-site, a receiver for receiving information carrying spread spectrum modulated signals from said cell-site and means for measuring signal quality in said information carrying spread spectrum modulated signals received by the system user; the cell-site comprises a transmitter for transmitting information carrying spread spectrum modulated signals to said system user, a receiver for receiving information carrying spread spectrum modulated signals from said system user and adjusting means for adjusting the power of information carrying spread spectrum modulated signals transmitted from the cell-site ; ; and power control means is provided for controlling the transmission power of the information carrying spread spectrum modulated signals by measuring the signal power in the information carrying spread spectrum modulated signals received by the system user and transmitting data representing the measured power to the cell-site by way of the information carrying spread spectrum modulated signals, the adjusting means being responsive to the data in the information carrying spread spectrum modulated signals from the system user to adjust the power in the information carrying spread spectrum modulated signals transmitted by the cell-site.

公开(公告)号：CZ283123B6

公开(公告)日：1998-01-14

申请号：CS387192

申请日：1991-06-21

Applicant: QUALCOMM INC

Inventor： GILHOUSEN KLEIN S ,  JACOBS IRWIN M ,  PADOVANI ROBERTO ,  WEAVER LINDSAY A JR ,  WHEATLEY CHARLES E III ,  VITERBI ANDREW J

IPC: H04B1/707 ,  H04B1/7075 ,  H04B1/709 ,  H04B1/7115 ,  H04B7/005 ,  H04B7/26 ,  H04J3/02 ,  H04J3/16 ,  H04J3/22 ,  H04J11/00 ,  H04J13/00 ,  H04J13/10 ,  H04J13/18 ,  H04L20060101 ,  H04L1/00 ,  H04L1/06 ,  H04L1/08 ,  H04L5/02 ,  H04L5/12 ,  H04L23/02 ,  H04L27/30 ,  H04W52/26 ,  H04B7/216 ,  H04B7/204 ,  H04B1/66

Abstract: A cell site, comprising: means for modulating configured to format digital data for transmission on a communications channel and to insert at least one timing command into the digital data, the digital data comprising a plurality of bits; means for transmitting coupled to the means for modulating and configured to receive the digital data from the means for modulating, convert the digital data to analog data, and transmit the analog data on the communications channel; and means for receiving configured to receive a signal from at least one remote unit and to determine a timing error of the received signal to be used to generate the timing command in accordance with the timing error, the means for receiving being coupled to the means for modulating and configured to provide the timing command to the means for modulating.

公开(公告)号：BR9510001A

公开(公告)日：1998-01-13

申请号：BR9510001

申请日：1995-11-29

Applicant: QUALCOMM INC

Inventor： TIEDEMANN EDWARD G JR ,  JOU YU-CHEUN ,  WEAVER LINDSAY A JR ,  BAYLEY GWAIN

IPC: H04L1/00 ,  H04B3/46 ,  H04B7/26 ,  H04B17/00 ,  H04L1/20 ,  H04L1/24 ,  H04L27/00 ,  H04L69/40 ,  H04L1/12

Abstract: The invention provides a system and method for testing signal transmission quality within a digital communication system and may be incorporated within a digital cellular communication system in which information is exchanged over spread spectrum communication channels. A test sequence of digital data transmitted over the communication channel is received at a receiving station, within which is also generated a replica of the test sequence of digital data. The accuracy of transmission over the communication channel is then determined by comparing the replica of the test sequence of digital data to the test sequence of data received over the communication channel. The invention allows the test sequence of digital data to be transmitted at one of a set of known data rates, with the received station being disposed to identify the data rate associated with each test sequence of digital data. In order to simulate the transmission of, for example, voice data, the system may be configured such that each test sequence of digital data is generated in accordance with a pseudorandom process.

公开(公告)号：BR9306033A

公开(公告)日：1997-11-18

申请号：BR9306033

申请日：1993-03-04

Applicant: QUALCOMM INC

Inventor： TIEDEMANN EDWARD G JR ,  WEAVER LINDSAY A JR ,  KERR RICHARD J ,  GEIB KENNETH M

IPC: H04J3/16 ,  H04B1/16 ,  H04B7/26 ,  H04W24/00 ,  H04W48/08 ,  H04W52/02 ,  H04W56/00 ,  H04W72/04 ,  H04W72/12 ,  H04W74/04

Abstract: A system for reducing receiver power consumption in communication system having a transmitter and one or more receivers schedules periodic messages in "slots." Each receiver is assigned a slot during which it monitors the transmissions. The transmitter transmits messages to the receiver only during the assigned slots. The receiver is in an "active state" during its assigned slot. It may remain in the active state after its assigned slot if the message requires the receiver to perform additional actions. During the "inactive state," which is the time period between successive occurrences of its assigned slot, the receiver may perform any action not requiring coordination with the transmitter. It may conserve power during this time by removing power from one or more components such as those used for monitoring the transmissions. At a time during the inactive state shortly before the assigned slot, the receiver applies power to these components and performs initializations. Such initializations may include reacquiring a pilot channel signal to which the receiver may synchronize itself if its timing signals have drifted out of synchronization with those of the transmitter during the preceding inactive state.

公开(公告)号：AT159357T

公开(公告)日：1997-11-15

申请号：AT89901507

申请日：1988-12-21

Applicant: QUALCOMM INC

Inventor： WEAVER LINDSAY A JR ,  KERR RICHARD J

IPC: G06F1/02 ,  G06F1/035 ,  G06F17/10 ,  H03B28/00 ,  H03M1/66 ,  H04L27/18

Abstract: A method and apparatus for converting phase data into amplitude data. Input phase data is divided into upper and lower phase increments using an input splitter which can also fold in quadrant data. One or more storage elements, such as sine and cosine ROMs, are connected to the input splitter and generate an amplitude, which forms one of a plurality of series terms, and first and second derivatives of the amplitude in response to the upper phase increment. The first derivative and lower phase increment are multiplied together in a digital multiplier to produce a second series term. A third series term comprising a product of the amplitude and lower phase increment squared, is generated by a term generator connected to the splitter and to the storage element. The term generator can comprise elements such as a ROM addressable by the lower phase increment and the amplitude. The first, second and third series terms are subsequently added together by one or more digital adders connected to the multiplier, term generator, storage element and in series with each other to form an output amplitude. An output controller is used for transferring the output amplitude to other apparatus and for incorporating quadrant unfolding elements.

公开(公告)号：BR9506315A

公开(公告)日：1997-08-05

申请号：BR9506315

申请日：1995-09-12

Applicant: QUALCOMM INC

Inventor： WEAVER LINDSAY A JR ,  BENDER PAUL E

IPC: B60S5/04 ,  H04B7/005 ,  H04B7/26 ,  H04W16/06 ,  H04W36/18 ,  H04W52/40 ,  H04W52/52 ,  H04Q7/36 ,  H04Q7/30

Abstract: An apparatus and method for adding and removing a target base station from a network of base stations, which includes base stations adjacent the target base station. The apparatus is comprised of two attenuators: a first for setting an artificial receive noise power level and a second for setting a transmit level. The transmit level determines the forward link coverage area of the base station. The artificial noise level sets the reverse link coverage area of the base station. When a base station is added, initially the transmit power is low and the artificial receive noise power is high such that the forward and reverse link coverage areas are collocated in close proximity to the base station. As the base station blossoms into full operation, the artificial receive noise power is decreased and the transmit level is increased such that the two coverage areas of the base station remain balanced as the coverage areas expand. When a base station is to be removed from a system, the same attenuators are used to wilt the two coverage areas in unison as the power level transmitted from the base station decreases.

公开(公告)号：AU1482897A

公开(公告)日：1997-05-15

申请号：AU1482897

申请日：1997-02-21

Applicant: QUALCOMM INC

Inventor： TIEDEMANN EDWARD G JR ,  WEAVER LINDSAY A JR ,  KERR RICHARD J ,  GEIB KENNETH M

IPC: H04J3/16 ,  H04B1/16 ,  H04B7/26 ,  H04W24/00 ,  H04W48/08 ,  H04W52/02 ,  H04W56/00 ,  H04W72/04 ,  H04W72/12 ,  H04W74/04 ,  H04Q7/20 ,  H04B7/00

Abstract: A system for reducing receiver power consumption in communication system having a transmitter and one or more receivers schedules periodic messages in "slots." Each receiver is assigned a slot during which it monitors the transmissions. The transmitter transmits messages to the receiver only during the assigned slots. The receiver is in an "active state" during its assigned slot. It may remain in the active state after its assigned slot if the message requires the receiver to perform additional actions. During the "inactive state," which is the time period between successive occurrences of its assigned slot, the receiver may perform any action not requiring coordination with the transmitter. It may conserve power during this time by removing power from one or more components such as those used for monitoring the transmissions. At a time during the inactive state shortly before the assigned slot, the receiver applies power to these components and performs initializations. Such initializations may include reacquiring a pilot channel signal to which the receiver may synchronize itself if its timing signals have drifted out of synchronization with those of the transmitter during the preceding inactive state.

公开(公告)号：AT152559T

公开(公告)日：1997-05-15

申请号：AT89902364

申请日：1988-12-21

Applicant: QUALCOMM INC

Inventor： GILHOUSEN KLEIN S ,  ANTONIO FRANKLIN P ,  JACOBS IRWIN M ,  WEAVER LINDSAY A JR

IPC: G02B6/293 ,  G02B6/34 ,  G02B6/42 ,  H01S3/08 ,  H01S5/14 ,  H01S5/40 ,  H04B1/7136 ,  H04B7/212 ,  H04B10/155 ,  H04L5/16 ,  H04B7/26 ,  H04J3/26

Abstract: A message communication system employing one or more centralized communication stations transferring messages through Earth orbit repeater satellites to or from mobile terminals with at least one central communication station having a first transceiver for transmitting a first communication signal to one or more mobile terminals and at least one mobile terminal having a second transceiver for receiving the first communication signal and demodulating it, and for transmitting at a predetermined duty cycle of the second transceiver, a second communication signal to at least one of the central communication stations. The preferred duty cycle over which the second communication signal is transmitted is about fifty percent of the second transceiver duty cycle. The communication system uses Time Division Multiplexed (TDM) communication signals using a number of channels as designated address channels with the remainder being used for data transfer. Information transmitted on the address channels is used by terminals to determine both the presence of a message and its corresponding data transmission or reception channel. In addition the terminals use the reception of the first communication signal to adjust return link transmission frequency to compensate for transmission path errors. The alternating duty cycle allows mobile terminals to use a single set of local oscillators for both transmission and reception modes of operation. To decrease interference with other systems the present system employs a power dispersal modulation function to achieve the footprint of a video signal for high transfer rate digital communication signals.