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1. 发明申请

WO2002058255A3 CDMA SYSTEM USING QUASI-ORTHOGONAL CODES 审中-公开
公开(公告)号：WO2002058255A3
公开(公告)日：2002-07-25
申请号：PCT/US2001/049154
申请日：2001-12-19
申请人： ERICSSON INC. , SOUROUR, Essam , ROOZBEH, Atarius , KHAYRALLAH, Ali
发明人： SOUROUR, Essam , ROOZBEH, Atarius , KHAYRALLAH, Ali
IPC分类号： H04Q7/38
摘要： A CDMA communication system uses a set of quasi-orthogonal codes to supplement the standard set of Walsh codes used in conventional systems. Users are assigned a code selected from the set of Walsh codes, if available. If the number of users exceeds the number of available Walsh codes, selected users are assigned to quasi-orthogonal codes. The users assigned quasi-orthogonal codes are chosen based on user mobility.

2. 发明申请

WO2002043273A3 SYSTEMS AND METHODS FOR REDUCED FORWARD LINK POWER CONTROL DELAY 审中-公开
公开(公告)号：WO2002043273A3
公开(公告)日：2002-05-30
申请号：PCT/US2001/043073
申请日：2001-11-14
申请人： ERICSSON INC. , SOUROUR, Essam
发明人： SOUROUR, Essam
IPC分类号： H04B7/005
摘要： A communication system (100) includes a mobile terminal (105) and a base station (210a). The mobile terminal (105) estimates signal quality of a forward link during a first power control group period and determines a power control bit based on the estimated signal quality. The mobile terminal (105) further transmits the power control bit on a reverse link during the first power control group period. The base station (210a) receives the power control bit on the reverse link and modifies forward link power based on the power control bit at commencement of a second power control group period.

3. 发明公开

EP1297671A2 METHOD AND APPARATUS FOR CHANNEL GAIN AND CHANNEL DELAY ESTIMATION IN A MULTI-CARRIER CDMA SYSTEM 审中-公开
标题翻译：方法和设备信道增益估计和信道时延估计IN A CDMA的更详尽输送系统
公开(公告)号：EP1297671A2
公开(公告)日：2003-04-02
申请号：EP01956163.8
申请日：2001-07-03
申请人： ERICSSON INC. , Sourour, Essam
发明人： SOUROUR, Essam , GUEY, Jiann-Ching
IPC分类号： H04L27/26
CPC分类号： H04B1/711 , H04B1/712 , H04L5/026 , H04L27/2657
摘要： A receiver for a multi-carrier CDMA system receives a signal transmitted having a known pilot sequence on plural sub-carriers. The system includes plural down-converters for down-converting the received signal to baseband signals. A delay and channel estimator correlates at least one of the baseband signals with a single wideband pilot signal, the single wideband pilot signal including all of the known pilot sequences, to produce an estimate of channel gain and multi-path delay. Plural demodulators, one for each of the plural sub-carriers, are operatively coupled to the delay and channel estimator, each for demodulating one of the plural baseband signals using the estimate of channel gain and multi-path delay.

4. 发明申请

WO2003030402A1 COMMUNICATIONS METHODS, APPARATUS AND COMPUTER PROGRAMS PRODUCTS FOR CHANNEL CHARACTERIZATION 审中-公开
标题翻译：通信方法，设备和计算机程序产品的通道特征
公开(公告)号：WO2003030402A1
公开(公告)日：2003-04-10
申请号：PCT/US2002/031937
申请日：2002-09-25
申请人： ERICSSON, INC. , BOTTOMLEY, Gregory, Edward , WANG, Yi-Pin, Eric , SOUROUR, Essam , GUEY, Jiann-Ching
发明人： BOTTOMLEY, Gregory, Edward , WANG, Yi-Pin, Eric , SOUROUR, Essam , GUEY, Jiann-Ching
IPC分类号： H04B7/005
CPC分类号： H04L25/0224 , H04B1/71052 , H04B1/712 , H04B7/0848 , H04B2201/709727 , H04L25/0204 , H04W52/16
摘要： A communications signal is processed to determine a proportionality relationship between a gain of a first channel (e.g., a pilot channel) and a gain of a second channel (e.g., a traffic channel) from a model of the first channel and information recovered from the second channel according to the model of the first channel. Symbol estimates may be generated from the information received over the second channel based on the determined proportionality relationship. In some embodiments, a gain multiplier may be estimated from information received over the second channel, a channel estimate for the first channel and a noise estimate for the first channel, for example, by generating despread values from the information received over the second channel, processing the despread values according to the channel estimate to generate symbol estimates, and generating the estimate of the gain multiplier from the noise estimate and the symbol estimates. Methods, apparatus and computer program products are provided.
摘要翻译：处理通信信号以确定来自第一信道的模型的第一信道（例如，导频信道）的增益和第二信道的增益（例如，业务信道）之间的比例关系，以及从第第二通道根据第一通道的型号。可以基于所确定的比例关系从通过第二信道接收的信息生成符号估计。在一些实施例中，可以通过第二信道接收的信息，第一信道的信道估计和第一信道的噪声估计来估计增益乘数，例如，通过在第二信道上接收的信息产生解扩值，根据信道估计处理解扩值以产生符号估计，以及根据噪声估计和符号估计生成增益乘数的估计。提供方法，仪器和计算机程序产品。

5. 发明申请

WO2002065649A2 AMPLIFIER PHASE CHANGE COMPENSATION 审中-公开
标题翻译：放大器相位变化补偿
公开(公告)号：WO2002065649A2
公开(公告)日：2002-08-22
申请号：PCT/US2002/002177
申请日：2002-01-22
申请人： TELEFONAKTIEBOLAGET LM ERICSSON , SOUROUR, Essam , REFAI, Wail
发明人： SOUROUR, Essam , REFAI, Wail
IPC分类号： H04B
CPC分类号： H03F3/72 , H03F3/189 , H03F3/24 , H03F3/68 , H03F2203/7236 , H03F2203/7239 , H04B1/0475 , H04B1/406 , H04B2001/0408
摘要： A baseband signal phase-compensation technique offsets undesirable phase shifts, or changes in phase shift, introduced in a transmit signal when changing transmit amplifier operating modes. Such mode changes may, for example, entail switching amplifier stages in and out of an amplification signal path. A phase compensator selectively operates on the baseband signal or signals to subtract out an amount of phase shift equal to the amount of phase shift added by switching one or more additional amplifier stages into the amplification signal path. Compensating baseband signals is this manner may be particularly valuable for the reverse link signal of a mobile terminal operating in a wireless communication environment such as CDMA2000. In such environments, abrupt phase shift changes in the transmit signal associated with transmit signal power control are undesirable.
摘要翻译：基带信号相位补偿技术在改变发射放大器工作模式时抵消了在发射信号中引入的不期望的相移或相移的变化。例如，这种模式改变可能需要在放大信号路径中进入和离开开关放大器级。相位补偿器选择性地对基带信号或信号进行操作，以通过将一个或多个附加放大器级切换到放大信号路径中来减去等于相移量的相移量。补偿基带信号对于在诸如CDMA2000的无线通信环境中操作的移动终端的反向链路信号是特别有价值的。在这种环境中，与发射信号功率控制相关的发射信号中的突变相移变化是不期望的。

6. 发明申请

WO2003052952A1 INTERFERENCE SUPPRESSION IN A CDMA RADIO RECEIVER 审中-公开
标题翻译： CDMA无线接收机的干扰抑制
公开(公告)号：WO2003052952A1
公开(公告)日：2003-06-26
申请号：PCT/EP2002/013918
申请日：2002-12-09
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) , SOUROUR, Essam , ERICSSON, Anders
发明人： SOUROUR, Essam , ERICSSON, Anders
IPC分类号： H04B1/707
CPC分类号： H04B1/7107 , H04B1/7115 , H04L25/0204 , H04L25/0212 , H04L25/0224
摘要： A method and apparatus for reducing interpath interference between a first signal and at least one other signal is provided. The invention provides for obtaining a relative phase of the first signal and the at least one other signal, determining an interference component on the first signal caused by the at least one other signal, and removing the interference component from the first signal. The invention is particularly adapted for non-coherent mean-value calculations in a RAKE receiver.
摘要翻译：提供了用于减少第一信号和至少一个其他信号之间的间路干扰的方法和装置。本发明提供了获得第一信号和至少一个其它信号的相对相位，确定由至少一个其它信号引起的对第一信号的干扰分量，以及从第一信号中去除干扰分量。本发明特别适用于RAKE接收机中的非相干平均值计算。

7. 发明申请

WO2003009617A1 PUSH-TO-TALK AND PUSH-TO-CONFERENCE IN A CDMA WIRELESS COMMUNICATIONS SYSTEM 审中-公开
标题翻译： CDMA无线通信系统中的PUSH-to-TALK和PUSH-TO-CONFERENCE
公开(公告)号：WO2003009617A1
公开(公告)日：2003-01-30
申请号：PCT/US2002/018644
申请日：2002-06-12
申请人： TELEFONAKTIEBOLAGET L.M. ERICSSON , REFAI, Wail , WITTER, Robert C. , SOUROUR, Essam
发明人： REFAI, Wail , WITTER, Robert C. , SOUROUR, Essam
IPC分类号： H04Q7/28
CPC分类号： H04M3/56 , H04W4/06 , H04W4/08 , H04W4/10 , H04W72/10 , H04W76/45 , H04W84/08
摘要： A method of providing push-to-talk and push-to-conference functionality in a CDMA system. Participants, in one embodiment, may be divided into active and inactive participants with active participants assigned a private uplink/downlink channel pair by the communication system. Inactive participants may be assigned a public downlink channel. In one embodiment, silent active participants of a conference or talk session are timed out and the private uplink/downlink channel pair previously assigned to such individuals are released for use elsewhere in the network or by other members of the conference. In a push-to-talk embodiment one private uplink/downlink channel pair may at any given time be passed between the presently active members of the group.
摘要翻译：一种在CDMA系统中提供即按即说和即按即说功能的方法。在一个实施例中，参与者可被划分为主动和非活动参与者，其中活动参与者通过通信系统分配专用上行链路/下行链路信道对。非活动参与者可以被分配公共下行链路信道。在一个实施例中，会议或通话会话的静默有效参与者被超时，并且先前分配给这些个人的专用上行链路/下行链路信道对被释放以在网络中的其他地方或由会议的其他成员使用。在即按即说实施例中，一个专用上行链路/下行链路信道对可以在任何给定时间在组的当前活动成员之间传递。

8. 发明授权

EP1266460B1 METHODS, SYSTEMS AND APPARATUS FOR PRECOMPENSATING FOR INTERFERENCE AMONG TRANSMITTED CODED CDMA SIGNALS 有权
标题翻译：方法，系统和设备的干扰作者：编码式预失真，SENT CDMA信号
公开(公告)号：EP1266460B1
公开(公告)日：2005-05-25
申请号：EP01918470.4
申请日：2001-03-09
申请人： Ericsson Inc.
发明人： SOUROUR, Essam
IPC分类号： H04B1/707
CPC分类号： H04B1/7103 , H04B2201/709709

9. 发明公开

EP1266460A2 METHODS, SYSTEMS AND APPARATUS FOR PRECOMPENSATING FOR INTERFERENCE AMONG TRANSMITTED CODED CDMA SIGNALS 有权
标题翻译：方法，系统和设备的干扰作者：编码式预失真，SENT CDMA信号
公开(公告)号：EP1266460A2
公开(公告)日：2002-12-18
申请号：EP01918470.4
申请日：2001-03-09
申请人： Ericsson Inc.
发明人： SOUROUR, Essam
IPC分类号： H04B1/707
CPC分类号： H04B1/7103 , H04B2201/709709
摘要： In a communications system such as a wireless code division multiple access (CDMA) communications system, an interference-compensated information symbol (rn2(t)) is generated from a source information symbol based on knowledge of an information symbol (d11(t)) and a first code (Q11(t)) used to generate a first coded signal. The first coded signal and a second coded signal representing the interference-compensated information symbol encoded according to a second code are then concurrently transmitted. In one embodiment, a composite signal is generated from at least one information symbol according to at least one code from a first group of codes of a set of quasi-orthogonal codes. An interference-compensated information symbol is then generated from a source information symbol, the composite signal and a code from a second group of codes of the set of quasi-orthogonal codes. The second coded signal represents the interference-compensated information symbol encoded according to the code from the second group, and is transmitted concurrently with transmission of the first coded signal. Preferably, the interference-compensated information symbol is generated by integrating (523) a product (521) of the composite signal and the complex conjugate of the code from the second group over a symbol interval (T), scaling the integrated product by a scaling factor, and subtracting (524) the scaled integrated product from the source information symbol to generate the interference-compensated information symbol (rn2(t)).

10. 发明授权

EP1119921B1 DELAY SEARCHER AND DELAY TRACKERS INTERACTION FOR NEW DELAYS ASSIGNMENT TO RAKE FINGERS 有权
标题翻译：传输时间和搜索延迟-NACHFÜHRINTERAKTION分配的RAKE分支
公开(公告)号：EP1119921B1
公开(公告)日：2004-07-14
申请号：EP99951626.3
申请日：1999-09-28
申请人： Ericsson Inc.
发明人： SOUROUR, Essam , BOTTOMLEY, Gregory, E. , RAMESH, Rajaram
IPC分类号： H04B1/707 , H04L25/02
CPC分类号： H04B1/7117 , H04B1/7113 , H04B1/7115
摘要： A direct sequence spread spectrum receiver for operating in a multipath fading channel comprises a rake receiver having plural rake fingers. Each rake finger demodulates a received signal from one of plural channel paths. The output of the plural rake fingers are combined. Each rake finger utilizes a select assigned delay to synchronize to a delay of the one channel path. A searcher periodically performs a channel search on the received signal to detect new delays of strongest paths in the channel. Plural trackers, one for each channel path, adjust the select assigned delays between searches performed by the searcher. A delay controller is operatively coupled to the searcher and the tracker. The delay controller compares new delays of the strongest paths from the searcher to the select assigned delays and reassigns one of the select assigned delays with one of the new delays only if the new delay differs from the one select assigned delay more than a preselect minimum amount.

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