公开(公告)号：JP2001086045A

公开(公告)日：2001-03-30

申请号：JP2000239398

申请日：2000-08-08

Applicant: LUCENT TECHNOLOGIES INC

Inventor： LI QUINN ,  NAREPIRI S RAMESHU

IPC: H04B1/707 ,  H04B7/02 ,  H04B7/06 ,  H04B7/12 ,  H04J11/00 ,  H04J13/18 ,  H04L1/00 ,  H04L1/04 ,  H04L1/06

Abstract: PROBLEM TO BE SOLVED: To improve the transmitting diversity of wireless communication by using the orthogonality of both encoding and carrier frequency. SOLUTION: A demultiplexer 84 divides the input data received from an interleaver 82 into parallel channel paths of six pieces of output 86, 88, 90, 92, 94 and 96 and sends them to multipliers 98, 100, 102, 104, 106 and 108 respectively. The multipliers 89, 102 and 106 encode the received outputs by means of a Walsh code Wn1, and the multipliers 100, 104 and 108 encode the received outputs by means of a Walsh code Wn2 that is orthogonal to the code Wn1. The output 110, 112 and 114 and 116, 118 and 120 are sent to the multipliers 130, 132, 134, 136, 138 and 140 respectively as orthogonal data. The signal paths are encoded by a pseudo random code that is used for the CDMA communication and sent to the RF sections 154-164, and the carriers of frequency f1, f2 and f3 are modulated by the orthogonal pairs of data respectively. Then the in-phase data are added together by adders 180 and 184 and transmitted with diversity via antennas 182 and 186.

公开(公告)号：JP2001036466A

公开(公告)日：2001-02-09

申请号：JP2000174770

申请日：2000-06-12

Applicant: LUCENT TECHNOLOGIES INC

Inventor： KUMAR SARATH ,  LI QUINN ,  WU XIAO CHENG

IPC: H04B7/005 ,  H04B7/26 ,  H04W52/14 ,  H04W52/40 ,  H04W52/50 ,  H04W52/54 ,  H04J13/00 ,  H04Q7/38

Abstract: PROBLEM TO BE SOLVED: To enable a mobile station to be operated in different activated states with respect to a forward link channel and a backward link by transmitting a power control signal to the mobile station from a base station and controlling the transmission power level of a backward link channel by permitting the mobile station to use the transmitted power control signal. SOLUTION: When a mobile unit is in an active state, a power control sub- channel is detached from a forward-only control channel (F-DCCH) and a forward basic channel (F-FCII) and backward link power is controlled by using a common power control channel (PCCH) instead. The power control channels on a forward link common power control channel (F-PCCH) control the power of a backward link enhanced access(R-EACH) or the power of a backward link common control channel (R-CCCH) with respect to a different mobile unit receiving the service of a base station transmitting F-PCCH.

公开(公告)号：JP2000286793A

公开(公告)日：2000-10-13

申请号：JP2000069354

申请日：2000-03-13

Applicant: LUCENT TECHNOLOGIES INC

Inventor： JIANG FRANCES ,  KAMEL RAAFAT EDWARD ,  LI QUINN ,  SALVARANI ALEXANDRO FEDERICO ,  WEAVER CARL FRANCIS

IPC: H04B1/04 ,  H04B7/005 ,  H04B7/26 ,  H04W52/12 ,  H04W52/24 ,  H04W52/26 ,  H04W52/36 ,  H04W52/40 ,  H04J13/00

Abstract: PROBLEM TO BE SOLVED: To obtain a communication system whose transmission power can be controlled. SOLUTION: The power control method in a wireless communication system includes a step where a target value 130 of signal quality of a received signal 270 is decided, a step where a power controlled variable conversion coefficient 245 is obtained, a step where the target value 130 of the signal quality is converted by the power controlled variable conversion coefficient 245, a step where the signal quality value 160 of the received signal 270 is measured, a step where the measured signal quality value 160 is compared with the converted signal quality target value 260, a step where increased power of the received signal 270 is requested in response to it that the signal quality value 160 of the received signal 270 is lower than the converted signal quality target value 260, and a step where decreased power of the received signal 270 is requested in response to it that the signal quality value 160 of the received signal 270 is higher than the converted signal quality target value 260.

公开(公告)号：JP2001127674A

公开(公告)日：2001-05-11

申请号：JP2000270156

申请日：2000-09-06

Applicant: LUCENT TECHNOLOGIES INC

Inventor： LI QUINN ,  ALLPRESS STEPHEN A ,  BUEHRER MICHAEL R ,  NAREPIRI S RAMESHU ,  SONI ROBERT ATMARAM

IPC: H04B1/04 ,  H04B7/02 ,  H04B7/04 ,  H04B7/06 ,  H04J3/00 ,  H04L1/06

Abstract: PROBLEM TO BE SOLVED: To realize common transmitter architecture which can be simply installed and which has an orthogonal transmit diversity(OTD) system and a space time spreading(STS) system. SOLUTION: The transmitter 10 has an OTD mode and an STD mode and 1st and 2nd antenna systems. The 1st antenna system 11 has a time multiplexer 12, an inerter 14, switches 16, 26, amplifiers 18, 20, a mixer 22 and an adder 24. The time multiplexer 12 applies time multiplexing to 1st in-phase signals with each other, 1st orthogonal signals with each other, a 2nd in-phase signal and its inverse, and a 2nd orthogonal signal and its inverse, respectively. The mixer 22 mixes the output of the time multiplexer 12 with a Walsh function. The result is fed to the adder 24. Only when the transmitter 10 is set to the STS mode, the switch 26 sends 3rd and 4th mixed time multiplex signals to the adder.

公开(公告)号：JP2000188590A

公开(公告)日：2000-07-04

申请号：JP32193399

申请日：1999-11-12

Applicant: LUCENT TECHNOLOGIES INC

Inventor： LI QUINN ,  RAMESH NALLEPILLI S

IPC: H04B1/707 ,  H04B7/26 ,  H04J13/10 ,  H04J13/00

Abstract: PROBLEM TO BE SOLVED: To guarantee a time difference between I and/or Q scrambling code sequences of a same user and/or a different user by mixing the component of a first complex code sequence with the corresponding component of a second complex code sequence. SOLUTION: On an I route 132, an I mixer 138 mixes or multiplies the I component of a long code sequence with the first component of a second complex code sequence like the I component of a short code sequence and the I component of the complex scrambling code sequence is generated. On a Q route 134, a Q mixer 140 mixes or multiplies a Q long code sequence with the second component of a complex short code sequence like the Q component of the short code sequence and the Q component of the complex scrambling code sequence is generated.

公开(公告)号：ES2178868T3

公开(公告)日：2003-01-01

申请号：ES99308692

申请日：1999-11-02

Applicant: LUCENT TECHNOLOGIES INC

Inventor： LI QUINN ,  RAMESH NALLEPILLI S

IPC: H04B1/707 ,  H04B7/26 ,  H04J13/10 ,  H04J13/00 ,  H03K3/84

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.

公开(公告)号：BR0003305A

公开(公告)日：2001-02-20

申请号：BR0003305

申请日：2000-06-07

Applicant: LUCENT TECHNOLOGIES INC

Inventor： KUMAR SARATH ,  WU XIAO CHENG ,  LI QUINN

IPC: H04B7/005 ,  H04B7/26 ,  H04W52/14 ,  H04W52/40 ,  H04W52/50 ,  H04W52/54 ,  H04Q7/38

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.

公开(公告)号：BR0003995A

公开(公告)日：2001-04-17

申请号：BR0003995

申请日：2000-09-05

Applicant: LUCENT TECHNOLOGIES INC

Inventor： LI QUINN ,  RAMESH NALLEPILLI S ,  SONI ROBERT ATMARAM ,  BUEHRER R MICHAEL ,  ALLPRESS STEPHEN ALAN

IPC: H04B1/04 ,  H04B7/02 ,  H04B7/04 ,  H04B7/06 ,  H04J3/00 ,  H04L1/06 ,  H04Q7/38

Abstract: Disclosed is a common transmitter architecture having incorporated both open loop transmit diversity schemes using a plurality of binary switches. Employment of binary switches allows for the sharing of certain components whether the transmitter 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 the complexity of the transmitter is simple enough to be implemented into a single application specific integrated chip.

公开(公告)号：AU5193800A

公开(公告)日：2001-02-22

申请号：AU5193800

申请日：2000-08-10

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 ,  H04B7/216 ,  H04J13/00

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.

公开(公告)号：CA2315579A1

公开(公告)日：2001-02-17

申请号：CA2315579

申请日：2000-08-04

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

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 channel s 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 modulate d carrier signals are then transmitted using at least two antennas, where one antenna is used for each carrier.