-
Patent Agency Ranking
公开(公告)号：WO1997002675A2
公开(公告)日：1997-01-23
申请号：PCT/US1996011059
申请日：1996-06-27
Applicant: INTERDIGITAL TECHNOLOGY CORPORATION
Inventor： INTERDIGITAL TECHNOLOGY CORPORATION , LOMP, Gary , OZLUTURK, Fatih , SILVERBERG, Avi
IPC: H04J13/04
CPC classification number: H04B7/2637 , G06F13/374 , H03H17/0226 , H03H17/06 , H04B1/707 , H04B1/7075 , H04B1/70753 , H04B1/70754 , H04B1/70755 , H04B1/70758 , H04B1/7077 , H04B1/708 , H04B1/7085 , H04B1/709 , H04B1/7093 , H04B1/711 , H04B1/7115 , H04B1/712 , H04B7/2628 , H04B7/264 , H04B2201/70701 , H04B2201/70702 , H04B2201/70703 , H04B2201/70707 , H04B2201/7071 , H04J13/00 , H04J13/004 , H04J13/0048 , H04J13/0077 , H04J13/10 , H04J13/107 , H04J13/12 , H04J13/16 , H04J2013/0037 , H04L1/0001 , H04L1/004 , H04L1/0042 , H04L1/0047 , H04L1/0054 , H04L1/0059 , H04L5/1446 , H04L25/0212 , H04L27/206 , H04L27/2332 , H04L2027/003 , H04L2027/0053 , H04N1/00912 , H04N1/3333 , H04N2201/3335 , H04W52/04 , H04W52/08 , H04W52/143 , H04W52/146 , H04W52/24 , H04W52/241 , H04W52/245 , H04W52/247 , H04W52/26 , H04W52/262 , H04W52/322 , H04W52/325 , H04W52/343 , H04W52/346 , H04W52/36 , H04W52/367 , H04W52/44 , H04W52/50 , H04W52/52 , H04W52/54 , H04W52/60 , Y02D10/14
Abstract: A CDMA modem includes a modem transmitter having: a code generator which provides an associated pilot code signal and which generates a plurality of message code signals; a spreading circuit which produces a spread-spectrum message signal by combining each of the information signals with a respective one of the message code signals; and a global pilot code generator that provides a global pilot code signal to which the message code signals are synchronized. The CDMA modem also includes a modem receiver having an associated pilot code generator and a group of associated pilot code correlators for correlating code-phase delayed versions of the associated pilot signal with a receive CDM signal to produce a despread associated pilot signal. The code phase of the associated pilot signal is changed responsive to an acquisition signal value until a pilot signal is received. The associated pilot code tracking logic adjusts the associated pilot code signal in phase responsive to the acquisition signal so that the signal power level of the despread associated pilot code signal is maximized. Finally, the CDMA modem receiver includes a group of message signal acquisition circuits, each including a plurality of receive message signal correlators which correlate respective local received message code signal to the CDM signal to produce a respective despread received message signal.
Abstract translation: CDMA调制解调器包括：调制解调器发送器，具有：代码生成器，其提供相关联的导频代码信号并产生多个消息代码信号; 扩展电路，其通过将每个信息信号与相应的一个消息代码信号组合来产生扩频消息信号; 以及提供消息代码信号同步的全局导频码信号的全局导频码发生器。 CDMA调制解调器还包括具有相关联的导频码发生器和一组相关联的导频码相关器的调制解调器接收机，用于将相关导频信号的码相位延迟版本与接收CDM信号相关，以产生解扩相关导频信号。 相应的导频信号的码相位响应于采集信号值而改变，直到接收到导频信号。 相关联的导频代码跟踪逻辑响应于采集信号相位调整相关联的导频代码信号，使得解扩相关导频码信号的信号功率电平最大化。 最后，CDMA调制解调器接收机包括一组消息信号采集电路，每组包括多个接收消息信号相关器，它将相应的本地接收到的消息码信号与CDM信号相关联，以产生相应的解扩接收消息信号。
-
公开(公告)号：EP1327313B1
公开(公告)日：2004-07-28
申请号：EP01981554.7
申请日：2001-10-12
Applicant: INTERDIGITAL TECHNOLOGY CORPORATION
Inventor： JACQUES, Alexander , KAZAKEVICH, Leonid , SILVERBERG, Avi
CPC classification number: H04W52/52 , H03G3/3047
Abstract: In a TDD wireless communication system between transmitters and associated receivers, automatic gain control of a receiver is only applied during the corresponding time slot within the TDD signal time frame architecture. Successive received signal strengths are measured and gain levels are stored as estimates for an initial gain level in future time slots of the TDD signal. Estimating techniques, such as averaging or trending of received signal strength over successive time slots, and averaging or trending of gain level settings, provide improved estimation of future initial gain levels.
-
公开(公告)号：EP1327313A1
公开(公告)日：2003-07-16
申请号：EP01981554.7
申请日：2001-10-12
Applicant: INTERDIGITAL TECHNOLOGY CORPORATION
Inventor： JACQUES, Alexander , KAZAKEVICH, Leonid , SILVERBERG, Avi
CPC classification number: H04W52/52 , H03G3/3047
Abstract: In a TDD wireless communication system between transmitters and associated receivers, automatic gain control of a receiver is only applied during the corresponding time slot within the TDD signal time frame architecture. Successive received signal strengths are measured and gain levels are stored as estimates for an initial gain level in future time slots of the TDD signal. Estimating techniques, such as averaging or trending of received signal strength over successive time slots, and averaging or trending of gain level settings, provide improved estimation of future initial gain levels.
-
公开(公告)号：EP0835568B1
公开(公告)日：2001-11-28
申请号：EP96923525.8
申请日：1996-06-27
Applicant: INTERDIGITAL TECHNOLOGY CORPORATION
Inventor： LOMP, Gary , OZLUTURK, Fatih , SILVERBERG, Avi
IPC: H04J13/04
CPC classification number: H04B7/2637 , G06F13/374 , H03H17/0226 , H03H17/06 , H04B1/707 , H04B1/7075 , H04B1/70753 , H04B1/70754 , H04B1/70755 , H04B1/70758 , H04B1/7077 , H04B1/708 , H04B1/7085 , H04B1/709 , H04B1/7093 , H04B1/711 , H04B1/7115 , H04B1/712 , H04B7/2628 , H04B7/264 , H04B2201/70701 , H04B2201/70702 , H04B2201/70703 , H04B2201/70707 , H04B2201/7071 , H04J13/00 , H04J13/004 , H04J13/0048 , H04J13/0077 , H04J13/10 , H04J13/107 , H04J13/12 , H04J13/16 , H04J2013/0037 , H04L1/0001 , H04L1/004 , H04L1/0042 , H04L1/0047 , H04L1/0054 , H04L1/0059 , H04L5/1446 , H04L25/0212 , H04L27/206 , H04L27/2332 , H04L2027/003 , H04L2027/0053 , H04N1/00912 , H04N1/3333 , H04N2201/3335 , H04W52/04 , H04W52/08 , H04W52/143 , H04W52/146 , H04W52/24 , H04W52/241 , H04W52/245 , H04W52/247 , H04W52/26 , H04W52/262 , H04W52/322 , H04W52/325 , H04W52/343 , H04W52/346 , H04W52/36 , H04W52/367 , H04W52/44 , H04W52/50 , H04W52/52 , H04W52/54 , H04W52/60 , Y02D10/14
Abstract: A multiple access, spread-spectrum communication system processes a plurality of information signals received by a Radio Carrier Station (RCS) over telecommunication lines for simultaneous transmission over a radio frequency (RF) channel as a code-division-multiplexed (CDM) signal to a group of Subscriber Units (SUs). The RCS receives a call request signal that corresponds to a telecommunication line information signal, and a user identification signal that identifies a user to receive the call. The RCS includes a plurality of Code Division Multiple Access (CDMA) modems, one of which provides a global pilot code signal. The modems provide message code signals synchronized to the global pilot signal. Each modem combines an information signal with a message code signal to provide a CDM processed signal. The RCS includes a system channel controller coupled to receive a remote call. An RF transmitter is connected to all of the modems to combine the CDM processed signals with the global pilot code signal to generate a CDM signal. The RF transmitter also modulates a carrier signal with the CDM signal and transmits the modulated carrier signal through an RF communication channel to the SUs. Each SU includes a CDMA modem which is also synchronized to the global pilot signal. The CDMA modem despreads the CDM signal and provides a despread information signal to the user. The system includes a closed loop power control system for maintaining a minimum system transmit power level for the RCS and the SUs, and system capacity management for maintaining a maximum number of active SUs for improved system performance.
-
公开(公告)号：EP0835568A2
公开(公告)日：1998-04-15
申请号：EP96923525.0
申请日：1996-06-27
Applicant: INTERDIGITAL TECHNOLOGY CORPORATION
Inventor： LOMP, Gary , OZLUTURK, Fatih , SILVERBERG, Avi
CPC classification number: H04B7/2637 , G06F13/374 , H03H17/0226 , H03H17/06 , H04B1/707 , H04B1/7075 , H04B1/70753 , H04B1/70754 , H04B1/70755 , H04B1/70758 , H04B1/7077 , H04B1/708 , H04B1/7085 , H04B1/709 , H04B1/7093 , H04B1/711 , H04B1/7115 , H04B1/712 , H04B7/2628 , H04B7/264 , H04B2201/70701 , H04B2201/70702 , H04B2201/70703 , H04B2201/70707 , H04B2201/7071 , H04J13/00 , H04J13/004 , H04J13/0048 , H04J13/0077 , H04J13/10 , H04J13/107 , H04J13/12 , H04J13/16 , H04J2013/0037 , H04L1/0001 , H04L1/004 , H04L1/0042 , H04L1/0047 , H04L1/0054 , H04L1/0059 , H04L5/1446 , H04L25/0212 , H04L27/206 , H04L27/2332 , H04L2027/003 , H04L2027/0053 , H04N1/00912 , H04N1/3333 , H04N2201/3335 , H04W52/04 , H04W52/08 , H04W52/143 , H04W52/146 , H04W52/24 , H04W52/241 , H04W52/245 , H04W52/247 , H04W52/26 , H04W52/262 , H04W52/322 , H04W52/325 , H04W52/343 , H04W52/346 , H04W52/36 , H04W52/367 , H04W52/44 , H04W52/50 , H04W52/52 , H04W52/54 , H04W52/60 , Y02D10/14
Abstract: A multiple access, spread-spectrum communication system processes a plurality of information signals received by a Radio Carrier Station (RCS) over telecommunication lines for simultaneous transmission over a radio frequency (RF) channel as a code-division-multiplexed (CDM) signal to a group of Subscriber Units (SUs). The RCS receives a call request signal that corresponds to a telecommunication line information signal, and a user identification signal that identifies a user to receive the call. The RCS includes a plurality of Code Division Multiple Access (CDMA) modems, one of which provides a global pilot code signal. The modems provide message code signals synchronized to the global pilot signal. Each modem combines an information signal with a message code signal to provide a CDM processed signal. The RCS includes a system channel controller coupled to receive a remote call. An RF transmitter is connected to all of the modems to combine the CDM processed signals with the global pilot code signal to generate a CDM signal. The RF transmitter also modulates a carrier signal with the CDM signal and transmits the modulated carrier signal through an RF communication channel to the SUs. Each SU includes a CDMA modem which is also synchronized to the global pilot signal. The CDMA modem despreads the CDM signal and provides a despread information signal to the user. The system includes a closed loop power control system for maintaining a minimum system transmit power level for the RCS and the SUs, and system capacity management for maintaining a maximum number of active SUs for improved system performance.
Abstract translation: 一种CDMA调制解调器包括一个调制解调器发射机，它具有：提供相关的导频码信号并产生多个消息码信号的码发生器; 扩频电路，通过将每个信息信号与相应的一个消息代码信号进行组合来产生扩频消息信号; 以及提供全局导频码信号的全局导频码生成器，其中消息码信号被同步到全局导频码信号。 CDMA调制解调器还包括一个调制解调器接收机，它具有相关的导频码发生器和一组相关的导频码相关器，用于将相关的导频信号的码相延迟版本与接收CDM信号相关以产生解扩相关导频信号。 响应于采集信号值改变相关导频信号的码相直到接收到导频信号。 相关的导频码跟踪逻辑根据捕获信号同相地调整相关的导频码信号，从而使解扩相关导频码信号的信号功率电平最大化。 最后，CDMA调制解调器接收机包括一组消息信号获取电路，每个电路包括多个接收消息信号相关器，它们将各自的本地接收消息代码信号与CDM信号相关以产生相应的解扩接收消息信号。
-
-
-
-
Search Results
5
records
(took 0.027 seconds)
