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91. 发明申请

US20060223587A1 Antenna array pattern distortion mitigation 有权
公开(公告)号：US20060223587A1
公开(公告)日：2006-10-05
申请号：US11182236
申请日：2005-07-15
申请人： Ivan Fernandez-Corbaton , Ahmad Jalali , Ernest Ozaki , Harris Simon , Sherman Gregory
发明人： Ivan Fernandez-Corbaton , Ahmad Jalali , Ernest Ozaki , Harris Simon , Sherman Gregory
IPC分类号： H04M1/00
CPC分类号： H01Q25/00
摘要： At least one feature provides a way to perform point-to-multipoint transmissions using adaptive or directional antennas while reducing antenna pattern distortion. Generally, rather than transmitting the same waveform to two or more receivers, an information-bearing signal is transformed into different decorrelated waveforms and each decorrelated waveform is transmitted to a different receiver. In one implementation, an information-bearing signal is transformed into two decorrelated signals such that their crosscorrelation, or autocorrelation of the information-bearing signal, is zero or very small. Such decorrelation may be achieved by sending a first signal to a first receiver while sending a second signal, having a radio frequency spectrum that is the spectrally inverted version of the first signal, to a second receiver. In another implementation, a first signal is transmitted to a first receiver and is also transmitted to a second receiver with a time delay.

92. 发明申请

US20060223573A1 Communications handoff using an adaptive antenna 失效
标题翻译：使用自适应天线的通信切换
公开(公告)号：US20060223573A1
公开(公告)日：2006-10-05
申请号：US11182295
申请日：2005-07-15
申请人： Ahmad Jalali
发明人： Ahmad Jalali
IPC分类号： H04M1/00
CPC分类号： H04W36/0055 , H04W16/24 , H04W16/28 , H04W36/0083 , H04W84/06 , H04W88/02
摘要： One implementation provides a novel station-to-station handoff using an adaptive or directional antenna. The directional antenna generates a plurality of directional search beams to search for pilot signals from new base stations. The search beams are scanned one beam at a time to obtain the relative direction of all new base stations detected. From the detected base stations, a new base station with the strongest signal strength is selected and compared to the currently used base station. If the new base station has stronger signal strength than the current base station, then a communication handoff from the current base station to the new base station is initiated. In one feature of the present invention, two directional beams are used to communicate with the current and new base stations. Once a communication link is established with the new base station, the directional beam to the current base station is terminated.
摘要翻译：一种实现方式提供使用自适应或定向天线的新颖的站间站切换。定向天线产生多个方向搜索波束以搜索来自新基站的导频信号。搜索光束一次扫描一个光束，以获得检测到的所有新基站的相对方向。从检测到的基站，选择具有最强信号强度的新基站，并将其与当前使用的基站进行比较。如果新基站具有比当前基站更强的信号强度，则从当前基站到新基站的通信切换开始。在本发明的一个特征中，使用两个定向波束与当前和新的基站进行通信。一旦与新基站建立通信链路，终止对当前基站的定向波束。

93. 发明申请

US20060088007A1 Multiplexing of real time services and non-real time services for OFDM systems 有权
标题翻译： OFDM系统的实时业务和非实时业务的多路复用
公开(公告)号：US20060088007A1
公开(公告)日：2006-04-27
申请号：US11297244
申请日：2005-12-07
申请人： Ahmad Jalali , Jay Walton , Mark Wallace
发明人： Ahmad Jalali , Jay Walton , Mark Wallace
IPC分类号： H04Q7/00
CPC分类号： H04L5/023
摘要： Transmitter and receiver units for use in an OFDM communications system and configurable to support multiple types of services. The transmitter unit includes one or more encoders, a symbol mapping element, and a modulator. Each encoder receives and codes a respective channel data stream to generate a corresponding coded data stream. The symbol mapping element receives and maps data from the coded data streams to generate modulation symbol vectors, with each modulation symbol vector including a set of data values used to modulate a set of tones to generate an OFDM symbol. The modulator modulates the modulation symbol vectors to provide a modulated signal suitable for transmission. The data from each coded data stream is mapped to a respective set of one or more “circuits”. Each circuit can be defined to include a number of tones from a number of OFDM symbols, a number of tones from a single OFDM symbol, all tones from one or more OFDM symbols, or some other combination of tones. The circuits can have equal size or different sizes. Different circuits can be used for full rate data (e.g., active speech) and low rate data (e.g., silence periods).
摘要翻译：发射机和接收机单元，用于OFDM通信系统并可配置为支持多种类型的业务。发射机单元包括一个或多个编码器，符号映射元件和调制器。每个编码器接收和编码相应的信道数据流以生成对应的编码数据流。符号映射元件接收并映射来自编码数据流的数据以产生调制符号向量，其中每个调制符号向量包括用于调制一组音调以生成OFDM符号的一组数据值。调制器调制调制符号向量以提供适于传输的调制信号。来自每个编码数据流的数据被映射到一个或多个“电路”的相应集合。每个电路可以被定义为包括来自多个OFDM符号的多个音调，来自单个OFDM符号的多个音调，来自一个或多个OFDM符号的所有音调，或一些其它音调组合。电路可以具有相同的尺寸或不同的尺寸。不同的电路可以用于全速率数据（例如，活动语音）和低速率数据（例如，静默时段）。

94. 发明申请

US20060087972A1 Rate selection for an OFDM system 有权
公开(公告)号：US20060087972A1
公开(公告)日：2006-04-27
申请号：US11297853
申请日：2005-12-08
申请人： Ahmad Jalali , Ivan Corbaton
发明人： Ahmad Jalali , Ivan Corbaton
IPC分类号： H04L12/26
CPC分类号： H04L5/006 , H04L1/0002 , H04L1/0021 , H04L1/0023 , H04L1/1819 , H04L5/0007 , H04L5/0046 , Y02D50/10
摘要： Techniques to determine the rate for a data transmission in an OFDM system. The maximum data rate that may be reliably transmitted over a given multipath (non-flat) channel by the OFDM system is determined based on a metric for an equivalent (flat) channel. For the given multipath channel and a particular rate (which may be indicative of a particular data rate, modulation scheme, and coding rate), the metric is initially derived from an equivalent data rate and the particular modulation scheme. A threshold SNR needed to reliably transmit the particular data rate using the particular modulation scheme and coding rate is then determined. The particular rate is deemed as being supported by the multipath channel if the metric is greater than or equal to the threshold SNR. Incremental transmission is used to account for errors in the determined data rate.

95. 发明授权

US07020073B2 Rate selection for an OFDM system 有权
公开(公告)号：US07020073B2
公开(公告)日：2006-03-28
申请号：US10086838
申请日：2002-02-28
申请人： Tamer Kadous , Ahmad Jalali , Ivan Jesus Fernandez Corbaton
发明人： Tamer Kadous , Ahmad Jalali , Ivan Jesus Fernandez Corbaton
IPC分类号： H04J11/00
CPC分类号： H04L5/006 , H04L1/0002 , H04L1/0021 , H04L1/0023 , H04L1/1819 , H04L5/0007 , H04L5/0046 , Y02D50/10
摘要： Techniques to determine the rate for a data transmission in an OFDM system. The maximum data rate that may be reliably transmitted over a given multipath (non-flat) channel by the OFDM system is determined based on a metric for an equivalent (flat) channel. For the given multipath channel and a particular rate (which may be indicative of a particular data rate, modulation scheme, and coding rate), the metric is initially derived from an equivalent data rate and the particular modulation scheme. A threshold SNR needed to reliably transmit the particular data rate using the particular modulation scheme and coding rate is then determined. The particular rate is deemed as being supported by the multipath channel if the metric is greater than or equal to the threshold SNR. Incremental transmission is used to account for errors in the determined data rate.

96. 发明申请

US20060023666A1 Multiplexing of real time services and non-real time services for OFDM systems 有权
公开(公告)号：US20060023666A1
公开(公告)日：2006-02-02
申请号：US11165451
申请日：2005-06-23
申请人： Ahmad Jalali , Jay Walton
发明人： Ahmad Jalali , Jay Walton
IPC分类号： H04Q7/00
CPC分类号： H04L5/023
摘要： Transmitter and receiver units for use in an OFDM communications system and configurable to support multiple types of services. The transmitter unit includes one or more encoders, a symbol mapping element, and a modulator. Each encoder receives and codes a respective channel data stream to generate a corresponding coded data stream. The symbol mapping element receives and maps data from the coded data streams to generate modulation symbol vectors, with each modulation symbol vector including a set of data values used to modulate a set of tones to generate an OFDM symbol. The modulator modulates the modulation symbol vectors to provide a modulated signal suitable for transmission. The data from each coded data stream is mapped to a respective set of one or more “circuits”. Each circuit can be defined to include a number of tones from a number of OFDM symbols, a number of tones from a single OFDM symbol, all tones from one or more OFDM symbols, or some other combination of tones. The circuits can have equal size or different sizes. Different circuits can be used for full rate data (e.g., active speech) and low rate data (e.g., silence periods).

97. 发明申请

US20050201335A1 Access channel with constrained arrival times 失效
标题翻译：访问频道具有约束到达时间
公开(公告)号：US20050201335A1
公开(公告)日：2005-09-15
申请号：US10952970
申请日：2004-09-28
申请人： Ivan Fernandez-Corbaton , Franklin Antonio , Leonard Schiff , Ahmad Jalali
发明人： Ivan Fernandez-Corbaton , Franklin Antonio , Leonard Schiff , Ahmad Jalali
IPC分类号： H04W74/04 , H04B1/707 , H04Q7/00 , H04B7/216
CPC分类号： H04W56/0005 , H04J13/16
摘要： Systems, methods and apparatus for configuring and accessing a random access channel in a CDMA communication system are disclosed. The number of users supported by a random access channel can be optimized by assigning a distinct time of arrival to each of a plurality of users. Each of the users can be time synchronized and can transmit data at a time that compensates for a propagation delay to allow the data to arrive at the destination receiver at the assigned time. In a CDMA system, each of the users can transmit data that is spread with the same spreading code, provided the cross correlation properties of the code are sufficient to allow identification of a source that is time offset relative to another user. The time of arrival can be determined based on the number of active users, and can be assigned as often as each transmission by each user.
摘要翻译：公开了用于在CDMA通信系统中配置和访问随机接入信道的系统，方法和装置。可以通过向多个用户中的每一个分配不同的到达时间来优化随机接入信道支持的用户数量。每个用户可以是时间同步的，并且可以在补偿传播延迟的时间发送数据，以允许数据在分配的时间到达目的地接收机。在CDMA系统中，如果代码的互相关属性足以允许识别相对于另一个用户的时间偏移的源，那么每个用户可以发送用相同的扩展码扩展的数据。可以基于活动用户的数量来确定到达时间，并且可以分配给每个用户每次发送的频率。

98. 发明申请

US20050190689A1 Suppressing cross-polarization interference in an orthogonal communication link 有权
标题翻译：抑制正交通信链路中的交叉极化干扰
公开(公告)号：US20050190689A1
公开(公告)日：2005-09-01
申请号：US10788729
申请日：2004-02-26
申请人： Sumantra Chakravarty , Ahmad Jalali , Leonard Schiff
发明人： Sumantra Chakravarty , Ahmad Jalali , Leonard Schiff
IPC分类号： H04B1/707 , H04B7/14 , H04B7/216 , H04J11/00 , H04J13/00
CPC分类号： H04B7/216 , H04J13/0048 , H04J13/18
摘要： An OCDMA transmission arrangement involves encoding both first and second nominally orthogonal polarization signals with a same long code, and transmitting the long-encoded first and second nominally orthogonal polarization signals from respective first and second transmission sources to at least one destination. A corresponding OCDMA demodulating arrangement demodulates the first and second nominally orthogonal polarization signals that were transmitted from respective first and second transmission sources after having been encoded with the same long code. The demodulation arrangement involves receiving the encoded first and second nominally orthogonal polarization signals, and applying the same long code to the received encoded first and second nominally orthogonal polarization signals.
摘要翻译： OCDMA传输装置包括用相同的长码对第一和第二标称正交极化信号进行编码，以及将长编码的第一和第二标称正交极化信号从相应的第一和第二传输源发送到至少一个目的地。相应的OCDMA解调装置在已经用相同的长码编码之后解调从相应的第一和第二传输源发送的第一和第二名义上正交的极化信号。解调装置包括接收经编码的第一和第二标称正交极化信号，并将相同的长码应用于接收的编码的第一和第二标称正交极化信号。

99. 发明申请

US20050075134A1 Non-wireless communication using sound 有权
标题翻译：无线通信使用声音
公开(公告)号：US20050075134A1
公开(公告)日：2005-04-07
申请号：US10670078
申请日：2003-09-23
申请人： Jack Steenstra , Paul Jacobs , Ahmad Jalali
发明人： Jack Steenstra , Paul Jacobs , Ahmad Jalali
IPC分类号： H04B1/38 , H04M1/725 , H04B1/40 , H04M1/00
CPC分类号： H04M1/72527 , H04B1/3805 , H04M1/6058
摘要： Method and apparatus are disclosed to allow non-wireless transmission or reception of data from one device to at least another device. More particularly, in one embodiment, a jack of a first device is configured to receive incoming analog signals encoded with digital data from the second device and to transmit outgoing analog signals encoded with digital data to the second device. The first device may also comprise a first conversion unit configured to encode digital data into the outgoing analog signals and a second conversion unit configured to recover digital data from the incoming analog signals.
摘要翻译：公开了允许从一个设备到至少另一个设备的数据的非无线传输或接收的方法和装置。更具体地，在一个实施例中，第一设备的插座被配置为接收来自第二设备的以数字数据编码的输入模拟信号，并将输出的用数字数据编码的模拟信号发送到第二设备。第一设备还可以包括被配置为将数字数据编码为输出模拟信号的第一转换单元和被配置为从输入的模拟信号中恢复数字数据的第二转换单元。

100. 发明授权

US06614779B1 CDMA physical layer packet mechanisms for distributed bursty traffic 有权
标题翻译： CDMA物理层分组机制，用于分布式突发业务
公开(公告)号：US06614779B1
公开(公告)日：2003-09-02
申请号：US09238443
申请日：1999-01-28
申请人： Alberto Gutierrez , Serge Manning , Ahmad Jalali
发明人： Alberto Gutierrez , Serge Manning , Ahmad Jalali
IPC分类号： H04J306
CPC分类号： H04W28/06 , H04B1/7075 , H04W48/08 , H04W74/0866 , H04W76/10 , H04W84/042 , H04W88/08
摘要： A new access channel protocol for use in cellular systems such as CDMA whereby the data transfer efficiency of an access message is increased by removing the requirement that a preamble frame and a message capsule frame have equal times of duration. With such removal, the BTS must inform listening MSs as to the time duration of the frames in each of the preamble and the message portions of the access channel time slot in addition to previously supplied information as to the number of frames in each portion. When unequal frame duration times are allowed, each portion of the access channel may be more nearly optimized to the actual time required to perform the functions of synchronization and message detection.
摘要翻译：一种用于诸如CDMA的蜂窝系统中的新的接入信道协议，由此通过消除前导码帧和消息胶囊帧具有相同持续时间的要求来增加接入消息的数据传输效率。通过这样的去除，除了先前提供的关于每个部分中的帧数的信息之外，BTS必须通知收听MS关于接入信道时隙的每个前导码和消息部分中的帧的持续时间。当允许不等长的帧持续时间时，访问信道的每个部分可以更接近于执行同步和消息检测功能所需的实际时间。

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