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21.发明专利
公开(公告)号：CA2317621A1
公开(公告)日：2001-03-13
申请号：CA2317621
申请日：2000-09-06
Applicant: LUCENT TECHNOLOGIES INC
Inventor： LI QUINN , ALLPRESS STEPHEN ALAN , BUEHRER R MICHAEL , SONI ROBERT ATMARAM , RAMESH NALLEPILLI S
Abstract: Disclosed is a common transmitter architecture having incorporated both op en loop transmit diversity schemes using a plurality of binary switches. Employment of binary switches allows for the sharing of certain components whether the transmitte r is utilizing a orthogonal transmit diversity (OTD) scheme or a space time spreading (STS) scheme. Accordingly, the number of components in the transmitter is minimized and th e complexity of the transmitter is simple enough to be implemented into a single application specific integrated chip.
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公开(公告)号：AU3795100A
公开(公告)日：2000-12-14
申请号：AU3795100
申请日：2000-06-06
Applicant: LUCENT TECHNOLOGIES INC
Inventor： KUMAR SARATH , LI QUINN , WU XIAO CHENG
Abstract: In a wireless communications system, a base station transmits power control signals (e.g., the power control bits of a power control sub-channel) to a mobile using a forward-link channel that is decoupled from all other signals transmitted from that base station to that mobile. For example, the decoupled forward-link channel may be a common power control channel. The mobile then uses the power control signals received in the decoupled forward-link channel to control its power level for transmitting one or more reverse-link channels to the base station. The ability of base stations to use decoupled forward-link channels in order to transmit their power control signals to a mobile enables a mobile to operate with different active sets for the forward and reverse links. This enables forward-link data traffic to be implemented using a simplex mode, even when the mobile is operating in soft handoff in the reverse link. This in turn greatly reduces the reactivation time involved in transitioning a mobile from the suspended state to the active state, which is particularly desirable for bursty (i.e., intermittent) packet data flow, as opposed to continuous circuit-oriented voice messaging.
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公开(公告)号：CA2310428A1
公开(公告)日：2000-12-11
申请号：CA2310428
申请日：2000-06-01
Applicant: LUCENT TECHNOLOGIES INC
Inventor： LI QUINN , WU XIAO CHENG , KUMAR SARATH
Abstract: In a wireless communications system, a base station transmits power control signals (e.g., the power control bits of a power control sub-channel) to a mobile using a forward-link channel that is decoupled from all other signals transmitted from that base station to that mobile. For example, the decoupled forward-link channel may be a common power control channel. The mobile then uses the power control signals received in the decoupled forwardlink channel to control its power level for transmitting one or more reverse-link channels to the base station. The ability of base stations to use decoupled forward-link channels in order to transmit their power control signals to a mobile enables a mobile to operate with different active sets for the forward and reverse links. This enables forward-link data traffic to be implemented using a simplex mode, even when the mobile is operating in soft handoff in the reverse link. This in turn greatly reduces the reactivation time involved in transitioning a mobile from the suspended state to the active state, which is particularly desirable for bursty (i.e., intermittent) packet data flow, as opposed to continuous circuit-oriented voice messaging.
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24.发明专利
公开(公告)号：CA2317621C
公开(公告)日：2004-03-23
申请号：CA2317621
申请日：2000-09-06
Applicant: LUCENT TECHNOLOGIES INC
Inventor： LI QUINN , ALLPRESS STEPHEN ALAN , RAMESH NALLEPILLI S , BUEHRER R MICHAEL , SONI ROBERT ATMARAM
Abstract: Disclosed is a common transmitter architecture having incorporated both op en loop transmit diversity schemes using a plurality of binary switches. Employment of binary switches allows for the sharing of certain components whether the transmitte r is utilizing a orthogonal transmit diversity (OTD) scheme or a space time spreading (STS) scheme. Accordingly, the number of components in the transmitter is minimized and th e complexity of the transmitter is simple enough to be implemented into a single application specific integrated chip.
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公开(公告)号：CA2284330C
公开(公告)日：2003-03-18
申请号：CA2284330
申请日：1999-09-29
Applicant: LUCENT TECHNOLOGIES INC
Inventor： RAMESH NALLEPILLI S , LI QUINN
Abstract: A complex spreading and/or scrambling code sequence ("scrambling code sequence") generation system uses a first complex code sequence having at least two components and a second complex code sequence having at least two components . The components of the first complex code sequence are respectively mixed wit h the corresponding components of the second complex code sequence to generate the complex scrambling code sequence. In doing so, an offset between the components of the complex scrambling code sequence is achieved for the same and/or different users. For example, the complex spreading code sequence generation system ca n use a long code generator which produces a long code sequence produced from the inner product of a code vector and a user mask. The long code sequence is provided to an I path and a Q path. To produce a complex long code sequence, the long code sequence on the Q path is delayed to produce a second long code sequence on the Q path or a Q component of the complex long code sequence. On the I path, the I long code sequence or the I component of the complex long code sequence is multiplied with an I component of a short code sequence to produce the I component of t he complex scrambling code sequence. On the Q path, the Q long code sequence is multiplied with a Q component of the short code sequence to produce the Q component of the complex scrambling code sequence. As such, the offset betwe en the components of the complex scrambling code sequence between different and/or the same user is at least the period of the short code. The complex scrambli ng code sequence can be used for spreading, scrambling, de-spreading or de-scramblin g an information signal.
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Patent Agency Ranking
公开(公告)号：DE69901870T2
公开(公告)日：2003-01-09
申请号：DE69901870
申请日：1999-11-02
Applicant: LUCENT TECHNOLOGIES INC
Inventor： LI QUINN , RAMESH NALLEPILLI S
Abstract: A complex spreading and/or scrambling code sequence ("scrambling code sequence") generation system uses a first complex code sequence having at least two components and a second complex code sequence having at least two components. The components of the first complex code sequence are respectively mixed with the corresponding components of the second complex code sequence to generate the complex scrambling code sequence. In doing so, an offset between the components of the complex scrambling code sequence is achieved for the same and/or different users. For example, the complex spreading code sequence generation system can use a long code generator which produces a long code sequence produced from the inner product of a code vector and a user mask. The long code sequence is provided to an I path and a Q path. To produce a complex long code sequence, the long code sequence on the Q path is delayed to produce a second long code sequence on the Q path or a Q component of the complex long code sequence. On the I path, the I long code sequence or the I component of the complex long code sequence is multiplied with an I component of a short code sequence to produce the I component of the complex scrambling code sequence. On the Q path, the Q long code sequence is multiplied with a Q component of the short code sequence to produce the Q component of the complex scrambling code sequence. As such, the offset between the components of the complex scrambling code sequence between different and/or the same user is at least the period of the short code. The complex scrambling code sequence can be used for spreading, scrambling, de-spreading or de-scrambling an information signal.
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公开(公告)号：BR0003460A
公开(公告)日：2001-04-03
申请号：BR0003460
申请日：2000-08-09
Applicant: LUCENT TECHNOLOGIES INC
Inventor： LI QUINN , RAMESH NALLEPILLI S
IPC: H04B1/707 , H04B7/02 , H04B7/06 , H04B7/12 , H04J11/00 , H04J13/18 , H04L1/00 , H04L1/04 , H04L1/06 , H04Q7/38
Abstract: A transmitter for wireless communications provides multiple types of orthogonality to improve transmit diversity. Transmit diversity is improved by using both coding and carrier frequency orthogonality. Data to be transmitted is broken into four parallel channels. Two of the channels are transmitted on a first carrier signal and the other two channels are transmitted on a second carrier signal. Channels transmitted on the same carrier signal are provided with orthogonal codes so that they may be separated by a receiver. Channels transmitted on different carrier signals may be encoded with identical orthogonal codes. The modulated carrier signals are then transmitted using at least two antennas, where one antenna is used for each carrier.
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公开(公告)号：BR9906122A
公开(公告)日：2000-09-19
申请号：BR9906122
申请日：1999-11-05
Applicant: LUCENT TECHNOLOGIES INC
Inventor： LI QUINN , RAMESH NALLEPILLI SUBRAMANIAN
Abstract: A complex spreading and/or scrambling code sequence ("scrambling code sequence") generation system uses a first complex code sequence having at least two components and a second complex code sequence having at least two components. The components of the first complex code sequence are respectively mixed with the corresponding components of the second complex code sequence to generate the complex scrambling code sequence. In doing so, an offset between the components of the complex scrambling code sequence is achieved for the same and/or different users. For example, the complex spreading code sequence generation system can use a long code generator which produces a long code sequence produced from the inner product of a code vector and a user mask. The long code sequence is provided to an I path and a Q path. To produce a complex long code sequence, the long code sequence on the Q path is delayed to produce a second long code sequence on the Q path or a Q component of the complex long code sequence. On the I path, the I long code sequence or the I component of the complex long code sequence is multiplied with an I component of a short code sequence to produce the I component of the complex scrambling code sequence. On the Q path, the Q long code sequence is multiplied with a Q component of the short code sequence to produce the Q component of the complex scrambling code sequence. As such, the offset between the components of the complex scrambling code sequence between different and/or the same user is at least the period of the short code. The complex scrambling code sequence can be used for spreading, scrambling, de-spreading or de-scrambling an information signal.
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29.发明专利
公开(公告)号：CA2299771A1
公开(公告)日：2000-09-15
申请号：CA2299771
申请日：2000-02-28
Applicant: LUCENT TECHNOLOGIES INC
Inventor： SALVARANI ALEXANDRO FEDERICO , WEAVER CARL FRANCIS , KAMEL RAAFAT EDWARD , LI QUINN , JIANG FRANCES
IPC: H04B1/04 , H04B7/005 , H04B7/26 , H04W52/12 , H04W52/24 , H04W52/26 , H04W52/36 , H04W52/40 , H04Q7/36
Abstract: A method of controlling the power in a wireless communication system (200). In one embodiment of the invention, a base station (210) determines the information rate of a signal to be transmitted (270) to a mobile station (220), and obtains the variable power control scaling factor (245) based on this information rate. The base station (210) then transmits the variable power control scaling factor (245) to the mobile station (220). The mobile station (220) determines a target signal quality measurement (130) for a received signal (270) from the base station (220), such as a target E b/N0 (130), and scales the target E b/N0 (130) by the variable power control scaling factor (245). The mobile station (220) also obtains an information rate scaling factor based on the information rate of the received signal (270), and further scales the target E b/N0 by this information rate scaling factor. The mobile station (220) then compares the target E b/N0 (130) to a measured E b/N0 (160) of the received signal (270). An increase in power of the received signal (270) is requested when the measured E b/N0 (160) of the received signal (270) is smaller than the scaled E b/N0 (260). A decrease in power of the received signal (270) is requested when the measured E b/N0 (160) of the received signal (270) is larger than the scaled E b/N0 (260). Providing the variable power control scaling factor (245) to the mobile station (220) allows frames having an information rate lower than the full rate to be transmitted at a power even lower than the power of a frame having an information rate equal to the full rate times the information scaling factor.
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公开(公告)号：CA2284330A1
公开(公告)日：2000-05-12
申请号：CA2284330
申请日：1999-09-29
Applicant: LUCENT TECHNOLOGIES INC
Inventor： RAMESH NALLEPILLI S , LI QUINN
Abstract: A complex spreading and/or scrambling code sequence ("scrambling code sequence") generation system uses a first complex code sequence having at least two components and a second complex code sequence having at least two components. The components of the first complex code sequence are respectively mixed with the corresponding components of the second complex code sequence to generate the complex scrambling code sequence. In doing so, an offset between the components of the complex scrambling code sequence is achieved for the same and/or different users. For example, the complex spreading code sequence generation system can use a long code generator which produces a long code sequence produced from the inner product of a code vector and a user mask. The long code sequence is provided to an I path and a Q path. To produce a complex long code sequence, the long code sequence on the Q path is delayed to produce a second long code sequence on the Q path or a Q component of the complex long code sequence. On the I path, the I long code sequence or the I component of the complex long code sequence is multiplied with an I component of a short code sequence to produce the I component of the complex scrambling code sequence. On the Q path, the Q long code sequence is multiplied with a Q component of the short code sequence to produce the Q component of the complex scrambling code sequence. As such, the offset between the components of the complex scrambling code sequence between different and/or the same user is at least the period of the short code. The complex scrambling code sequence can be used for spreading, scrambling, de-spreading or de-scrambling an information signal.
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