公开(公告)号：BR9814859A

公开(公告)日：2000-10-03

申请号：BR9814859

申请日：1998-11-10

Applicant: QUALCOMM INC

Inventor： ZEHAVI EPHRAIM ,  SKINNER GORDON

IPC: H04B1/7073 ,  H04B1/7075 ,  H04B1/7077 ,  H04B1/708 ,  H04B1/71 ,  H04B7/185 ,  H04B7/26 ,  H04Q7/28 ,  H04B1/707 ,  H04B7/216

Abstract: A system and method for rapidly acquiring timing of an access transmission that uses an access probe that is transmitted in stages. A first stage of the access probe is spread with a short pseudonoise (PN) code pair. A second stage of the access probe is spread with both the short PN code pair and a long PN code. Transmitting the access probe in stages reduces the number of hypotheses, and hence the time, required by a receiver attempting to acquire the access probe.

公开(公告)号：NO20001819A

公开(公告)日：2000-06-08

申请号：NO20001819

申请日：2000-04-07

Applicant: QUALCOMM INC

Inventor： HARMS BRIAN ,  BUTLER BRIAN ,  SKINNER GORDON

IPC: H04J13/12 ,  H04B1/707 ,  H04B1/7075 ,  H04B1/7077 ,  H04B7/216 ,  H04J13/00

CPC classification number: H04B1/7077 ,  H04B1/707 ,  H04B1/7075 ,  H04B1/70755 ,  H04B7/216 ,  H04J13/0022

公开(公告)号：HK1013375A1

公开(公告)日：1999-08-20

申请号：HK98114508

申请日：1998-12-21

Applicant: QUALCOMM INC

Inventor： SKINNER GORDON ,  HARMS BRIAN

IPC: H04L27/32 ,  B60R11/00 ,  B60R11/02 ,  B60R11/04 ,  H04B1/7075 ,  H04B1/7077 ,  H04B

Abstract: A technique for using energy received by subscriber units over multiple orthogonal channels within a spread spectrum communication system to acquire signal timing by controlling signal amplitude integration intervals used in detecting such timing. Received signals are despread and respective amplitudes integrated over periods that are divisible by factors of 2 into the length of Walsh functions used to generate orthogonal signal channels. Non-coherent combinations of the results of this integration are subsequently formed over periods that commence and terminate on Walsh function boundaries, and used to determine when a correct time offset has been selected for despreading signals. Additional advantages are realized by assigning signals that consistently provide a higher energy content such as paging, synchronization, and most frequently assigned traffic channels to specific orthogonal channels within the communication system. In exemplary embodiments, Walsh functions of length 128 are used as channelizing codes and a pilot signal is assigned to channel 0. This results in traffic channels or paging and synchronization functions being assigned to channel 64 when the integration periods are 64 chips long, and to channels 32, 64, and 96 when the periods are 32 chips long. In this manner, additional energy is available during the integration process for use in determining when correct signal acquisition timing offsets have been selected, without the use of additional hardware.

公开(公告)号：FI971423A0

公开(公告)日：1997-04-04

申请号：FI971423

申请日：1997-04-04

Applicant: QUALCOMM INC

Inventor： SKINNER GORDON ,  HARMS BRIAN

IPC: H04L27/32 ,  B60R11/00 ,  B60R11/02 ,  B60R11/04 ,  H04B1/7075 ,  H04B1/7077 ,  H04B ,  H04J

Abstract: A technique for using energy received by subscriber units over multiple orthogonal channels within a spread spectrum communication system to acquire signal timing by controlling signal amplitude integration intervals used in detecting such timing. Received signals are despread and respective amplitudes integrated over periods that are divisible by factors of 2 into the length of Walsh functions used to generate orthogonal signal channels. Non-coherent combinations of the results of this integration are subsequently formed over periods that commence and terminate on Walsh function boundaries, and used to determine when a correct time offset has been selected for despreading signals. Additional advantages are realized by assigning signals that consistently provide a higher energy content such as paging, synchronization, and most frequently assigned traffic channels to specific orthogonal channels within the communication system. In exemplary embodiments, Walsh functions of length 128 are used as channelizing codes and a pilot signal is assigned to channel 0. This results in traffic channels or paging and synchronization functions being assigned to channel 64 when the integration periods are 64 chips long, and to channels 32, 64, and 96 when the periods are 32 chips long. In this manner, additional energy is available during the integration process for use in determining when correct signal acquisition timing offsets have been selected, without the use of additional hardware.

公开(公告)号：NO318825B1

公开(公告)日：2005-05-09

申请号：NO20001819

申请日：2000-04-07

Applicant: QUALCOMM INC

Inventor： HARMS BRIAN ,  BUTLER BRIAN K ,  SKINNER GORDON

IPC: H04J13/12 ,  H04B1/707 ,  H04B1/7075 ,  H04B1/7077 ,  H04B7/216 ,  H04J13/00

Abstract: A technique for spreading information signals in a spread spectrum communication system to provide increased signal acquisition speed. A first PN spreading code or code set is used to spread information signals along with a second PN spreading code sequence or function. The second PN code is synchronized with the first PN spreading code, but has a larger code period so that each code chip of the second PN code extends over the entire period of the first PN code. The longer period spreading code forms an outer code which helps provide unambiguous beam identification and easily acquired frame timing in the presence of dynamically changing signal path delay, improving signal acquisition.

公开(公告)号：BR9813026A

公开(公告)日：2000-08-15

申请号：BR9813026

申请日：1998-10-09

Applicant: QUALCOMM INC

Inventor： HARMS BRIAN ,  BUTLER BRIAN ,  SKINNER GORDON

IPC: H04J13/12 ,  H04B1/707 ,  H04B1/7075 ,  H04B1/7077 ,  H04B7/216 ,  H04J13/00

Abstract: A technique for spreading information signals in a spread spectrum communication system to provide increased signal acquisition speed. A first PN spreading code or code set is used to spread information signals along with a second PN spreading code sequence or function. The second PN code is synchronized with the first PN spreading code, but has a larger code period so that each code chip of the second PN code extends over the entire period of the first PN code. The longer period spreading code forms an outer code which helps provide unambiguous beam identification and easily acquired frame timing in the presence of dynamically changing signal path delay, improving signal acquisition.

公开(公告)号：FI971423A

公开(公告)日：1997-04-21

申请号：FI971423

申请日：1997-04-04

Applicant: QUALCOMM INC

Inventor： SKINNER GORDON ,  HARMS BRIAN

IPC: H04L27/32 ,  B60R11/00 ,  B60R11/02 ,  B60R11/04 ,  H04B1/7075 ,  H04B1/7077 ,  H04B7/216

Abstract: A technique for using energy received by subscriber units over multiple orthogonal channels within a spread spectrum communication system to acquire signal timing by controlling signal amplitude integration intervals used in detecting such timing. Received signals are despread and respective amplitudes integrated over periods that are divisible by factors of 2 into the length of Walsh functions used to generate orthogonal signal channels. Non-coherent combinations of the results of this integration are subsequently formed over periods that commence and terminate on Walsh function boundaries, and used to determine when a correct time offset has been selected for despreading signals. Additional advantages are realized by assigning signals that consistently provide a higher energy content such as paging, synchronization, and most frequently assigned traffic channels to specific orthogonal channels within the communication system. In exemplary embodiments, Walsh functions of length 128 are used as channelizing codes and a pilot signal is assigned to channel 0. This results in traffic channels or paging and synchronization functions being assigned to channel 64 when the integration periods are 64 chips long, and to channels 32, 64, and 96 when the periods are 32 chips long. In this manner, additional energy is available during the integration process for use in determining when correct signal acquisition timing offsets have been selected, without the use of additional hardware.

公开(公告)号：CA2202621A1

公开(公告)日：1997-01-23

申请号：CA2202621

申请日：1996-06-28

Applicant: QUALCOMM INC

Inventor： SKINNER GORDON ,  HARMS BRIAN

IPC: H04B1/69 ,  H04B1/76 ,  H04J13/00

Abstract: A technique for using energy received by subscriber units over multiple orthogonal channels within a spread spectrum communication system to acquire signal timing by controlling signal amplitude integration intervals used in detecting such timing. Received signals (10, 14, 18) are despread (40, 60) and respective amplitues coherently integrated (42, 44, 46, 62) over periods that are divisible by factors of two into the length of Walsh functions used to generate orthogonal signal channels. Non-coherent combinations of the results of this integration are subsequently formed (68) over periods that commence and terminate on Walsh function boundaries, and used to determine when a correct time offset has been selected for despreading signals. Additional advantages are realized by assigning signals that consistently provide a higher energy content such as paging, synchronization, and most frequently assigned traffic channels to specific orthogonal channels within the communication system. In exemplary embodiments, Walsh functions of length 128 are used as channelizing codes and a pilot signal is assigned to channel 0. This results in traffic channels or paging and synchronization functions being assigned to channel (64) when the integration periods are (64) chips long, and to channels (32, 64 and 96) when the periods are (32) chips long. In this manner, additional energy is available during the integration process for use in determining when correct signal acquisition timing offsets have been selected, without the use of additional hardware.

公开(公告)号：CA2305718C

公开(公告)日：2010-12-07

申请号：CA2305718

申请日：1998-10-09

Applicant: QUALCOMM INC

Inventor： HARMS BRIAN ,  BUTLER BRIAN ,  SKINNER GORDON

IPC: H04J13/12 ,  H04B1/707 ,  H04B1/7075 ,  H04B1/7077 ,  H04B7/216 ,  H04J13/00

Abstract: A technique for spreading information signals in a spread spectrum communication system to provide increased signal acquisition speed. A first PN spreading code or code set is used to spread information signals along with a second PN spreading code sequence or function. The second PN code is synchronized with the first PN spreading code, but has a larger code period so that each code chip of the second PN code extends over the entire period of the first PN code. The longer period spreading code forms an outer code which helps provide unambiguous beam identification and easily acquired frame timing in the presence of dynamically changing signal path delay, improving signal acquisition.

公开(公告)号：CA2202621C

公开(公告)日：2005-11-15

申请号：CA2202621

申请日：1996-06-28

Applicant: QUALCOMM INC

Inventor： HARMS BRIAN ,  SKINNER GORDON

IPC: H04B1/69 ,  H04B1/76 ,  H04J13/00

Abstract: A technique for using energy received by subscriber units over multiple orthogonal channels within a spread spectrum communication system to acquire signal timing by controlling signal amplitude integration intervals used in detecting such timing. Received signals (10, 14, 18) are despread (40, 60) and respective amplitues coherently integrated (42, 44, 46, 62) over periods that are divisible by factors of two into the length of Walsh functions used to generate orthogonal signal channels. Non-coherent combinations of the results of this integration are subsequently formed (68) over periods that commence and terminate on Walsh function boundaries, and used to determine when a correct time offset has been selected for despreading signals. Additional advantages are realized by assigning signals that consistently provide a higher energy content such as paging, synchronization, and most frequently assigned traffic channels to specific orthogonal channels within the communication system. In exemplary embodiments, Welsh functions of length 12 8 are used as channelizing codes and a pilot signal is assigned to channel 0. This results in traffic channels or paging and synchronization functions being assigned to channel (64) when the integration periods are (64) chips long, and to channels (32, 64 and 96) whe n the periods are (32) chips long. In this manner, additional energy is available during the integration process for use in determining wh en correct signal acquisition timing offsets have been selected, without the use of additional hardware.