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公开(公告)号：US5917447A
公开(公告)日：1999-06-29
申请号：US654946
申请日：1996-05-29
CPC分类号： H01Q3/26
摘要： A digital beam forming system includes an array of computing units (60-76) for weighting incoming signals and a plurality of summing processors (80-84) for generating output signals that represent weighted sums corresponding to rows within the array. The digital beam forming system can be incorporated in either a transmitter or receiver used in a radio frequency communications system.
摘要翻译： 数字波束形成系统包括用于加权输入信号的计算单元阵列（60-76）和多个求和处理器（80-84），用于产生表示对应于阵列内的行的加权和的输出信号。 数字波束形成系统可以结合在射频通信系统中使用的发射机或接收机中。
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公开(公告)号：US6038265A
公开(公告)日：2000-03-14
申请号：US936306
申请日：1997-09-24
CPC分类号： G06J1/00
摘要： An electronic apparatus that includes a digital processor (12), a first digital pulse width modulator (304), a second digital pulse width modulator (306), a combining circuit (308), and a load (310). The digital processor (12) produces a first digital signal (314) and a second digital signal (316). The first digital pulse width modulator (304) is responsive to the first digital signal (314), and the second digital pulse width modulator (306) is responsive to the second digital signal (316). The combining circuit (308) is responsive to the first digital pulse width modulator (304) and the second digital pulse width modulator (306). The load (310) is responsive to the combining circuit (308).
摘要翻译： 一种电子设备，包括数字处理器（12），第一数字脉宽调制器（304），第二数字脉宽调制器（306），组合电路（308）和负载（310）。 数字处理器（12）产生第一数字信号（314）和第二数字信号（316）。 第一数字脉冲宽度调制器（304）响应于第一数字信号（314），并且第二数字脉宽调制器（306）响应于第二数字信号（316）。 组合电路（308）响应于第一数字脉冲宽度调制器（304）和第二数字脉冲宽度调制器（306）。 负载（310）响应于组合电路（308）。
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公开(公告)号：US5961579A
公开(公告)日：1999-10-05
申请号：US838253
申请日：1997-04-17
申请人： ShaoWei Pan , Shay-Ping T. Wang , Bernard E. Sigmon , Stephen Chih-Hung Ma , Kevin M. Laird , Jeffrey G. Toler
发明人： ShaoWei Pan , Shay-Ping T. Wang , Bernard E. Sigmon , Stephen Chih-Hung Ma , Kevin M. Laird , Jeffrey G. Toler
CPC分类号： H04W52/52
摘要： An apparatus that includes a logarithm based processor (216) having at least one digital logarithm converter (202) and a power amplifier (208) responsive to the logarithm based processor (216).
摘要翻译： 一种包括基于对数的处理器（216）的装置，其具有响应于基于对数的处理器（216）的至少一个数字对数转换器（202）和功率放大器（208）。
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公开(公告)号：US6100756A
公开(公告)日：2000-08-08
申请号：US157682
申请日：1998-09-21
CPC分类号： H03F1/0222
摘要： A method and apparatus for efficient power amplification of a wideband signal with a correspondingly wide modulation bandwidth includes an envelope detector (220), a soft switch modulator (270), and a power amplifier (260). The soft switch modulator (270) drives a high side switch (330), and a low side switch (340) to amplify a pulsewidth modulated signal. Electrical signal path lengths within a soft switch driver (320) are dynamically modified so as to always turn off one switch before turning on the other.
摘要翻译： 具有相应宽的调制带宽的宽带信号的有效功率放大的方法和装置包括包络检测器（220），软开关调制器（270）和功率放大器（260）。 软开关调制器（270）驱动高侧开关（330）和低侧开关（340）以放大脉宽调制信号。 在软开关驱动器（320）内的电信号路径长度被动态修改，以便在接通另一个开关之前总是关闭一个开关。
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公开(公告)号：US5920596A
公开(公告)日：1999-07-06
申请号：US935212
申请日：1997-09-22
CPC分类号： G06J1/00
摘要： An apparatus for amplifying a signal that includes a digital processor (12) producing a first digital signal (20) and a second digital signal (22), a pulse width modulator (32) receiving the first digital signal (20) and producing a pulse width modulated signal, an amplitude restoration module (37) responsive to the pulse width modulator (32), the amplitude restoration module (37) producing an amplitude envelope signal, a frequency upconverter (16) receiving the second digital signal (22) and producing a frequency modulated signal, and a power amplifier (18) responsive to the frequency upconverter and the amplitude restoration module (37). The power amplifier receives the frequency modulated signal and the amplitude envelope signal and produces an amplified output signal.
摘要翻译： 一种用于放大包括产生第一数字信号（20）和第二数字信号（22）的数字处理器（12）的信号的装置，接收第一数字信号（20）并产生脉冲的脉冲宽度调制器（32） 宽度调制信号，响应脉宽调制器（32）的振幅恢复模块（37），振幅恢复模块（37）产生幅度包络信号，接收第二数字信号（22）的上变频器（16）并产生 频率调制信号和响应于上变频器和振幅恢复模块（37）的功率放大器（18）。 功率放大器接收调频信号和幅度包络信号，并产生放大的输出信号。
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公开(公告)号：US6061023A
公开(公告)日：2000-05-09
申请号：US963485
申请日：1997-11-03
申请人： Sam Mordochai Daniel , Stephen Chih-Hung Ma , Keith Vaclav Warble , Shao-Wei Pan , Shay-Ping Thomas Wang
发明人： Sam Mordochai Daniel , Stephen Chih-Hung Ma , Keith Vaclav Warble , Shao-Wei Pan , Shay-Ping Thomas Wang
IPC分类号： G01S7/28 , H01Q3/26 , H04B7/10 , H04B7/185 , H04B7/204 , H04W28/04 , H04W84/06 , H04R7/185 , H01Q3/22
CPC分类号： G01S7/2813 , H01Q3/2611 , H04B7/2041 , H04W84/06
摘要： An enhanced digital beamformer (EDBF) (210, FIG. 2) is provided for use in a transceiver subsystem (200, FIG. 2) for mitigating interference and increasing the frequency reuse factor in communication systems. The EDBF is used to produce wide nulls (520, FIG. 5) in at least one steerable antenna beam pattern. By directing wide nulls at undesired signals, the EDBF provides a more efficient processing of antenna beam patterns in communication systems. The EDBF is used in geostationary satellites, non-geostationary satellites, and terrestrial communication devices. The EDBF combines a unique algorithm, a special processor, and an array antenna to significantly improve the capacity of current and future communication systems, while remaining compatible with existing modulation techniques.
摘要翻译： 增强数字波束形成器（EDBF）（210，图2）被提供用于收发器子系统（图2中的200），用于减轻干扰并增加通信系统中的频率重用因子。 EDBF用于在至少一个可导向天线波束图案中产生宽空值（520，图5）。 通过在不期望的信号处引导宽的零点，EDBF在通信系统中提供更有效的天线波束图案的处理。 EDBF用于对地静止卫星，非对地静止卫星和地面通信设备。 EDBF结合了独特的算法，特殊处理器和阵列天线，以显着提高当前和未来通信系统的容量，同时保持与现有调制技术的兼容性。
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7.发明授权Method and intelligent digital beam forming system responsive to traffic demand 失效响应交通需求的方法和智能数字波束成形系统
公开(公告)号：US5754139A
公开(公告)日：1998-05-19
申请号：US739529
申请日：1996-10-30
CPC分类号： H04B7/2041
摘要： An intelligent digital beam former (10) in conjunction with a satellite based array antenna (20) provides a plurality of dynamically controllable antenna beams (52) for communication with subscriber units (90) in response to demand for communication services. Geographic portions within the satellite's footprint that have a higher-demand for communication services are dynamically provided additional antenna beams while geographic portions having a lower demand for communication services are provided less antenna beams. When used on a non-geostationary satellite, the digital beam forming coefficients are dynamically adjusted to steer the antenna beams to maintain their ground location. The antenna beams are also shaped to help optimized geographic coverage.
摘要翻译： 响应于对通信服务的需求，与卫星阵列天线（20）结合的智能数字波束形成器（10）提供多个可动态可控天线波束（52），用于与用户单元（90）通信。 具有对通信服务的更高要求的卫星覆盖区内的地理部分被动态地提供附加的天线波束，而具有对通信服务的较低需求的地理部分被提供较少的天线波束。 当在非对地静止卫星上使用时，动态调整数字波束形成系数以引导天线波束以保持其地面位置。 天线梁的形状也可以帮助优化地理覆盖。
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8.发明授权Method and intelligent digital beam forming system with improved signal quality communications 失效方法和智能数字波束形成系统具有改进的信号质量通信
公开(公告)号：US5856804A
公开(公告)日：1999-01-05
申请号：US739645
申请日：1996-10-30
IPC分类号： G01S3/42 , G01S7/28 , G01S7/36 , H01Q3/26 , H04B1/38 , H04B7/19 , H04B7/195 , H04B7/26 , H01Q3/22
CPC分类号： G01S3/42 , H01Q3/2605 , G01S7/2813 , G01S7/36
摘要： An intelligent digital beam former (10) in conjunction with a satellite based array antenna (20) provides a plurality of dynamically controllable antenna beams (52) for communication with subscriber units on earth's surface. The location of a subscriber unit (90) requesting communication services is determined and an individual antenna beams is formed and assigned to the subscriber unit. The antenna beam tracks the subscriber units as the satellite and/or the subscriber unit moves. The digital beam forming coefficients are dynamically adjusted and controlled to help maximize the signal quality of communications with the subscriber units.
摘要翻译： 结合卫星阵列天线（20）的智能数字波束成形器（10）提供多个可动态可控的天线波束（52），用于与地球表面上的用户单元进行通信。 确定请求通信服务的用户单元（90）的位置，形成单独的天线波束并将其分配给用户单元。 当卫星和/或用户单元移动时，天线波束跟踪用户单元。 数字波束形成系数被动态调整和控制，以帮助最大化与用户单元的通信的信号质量。
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9.发明授权Method and intelligent digital beam forming system for interference mitigation 失效用于干扰减轻的方法和智能数字波束形成系统
公开(公告)号：US5754138A
公开(公告)日：1998-05-19
申请号：US739528
申请日：1996-10-30
CPC分类号： H01Q23/00 , H01Q1/288 , H01Q25/002 , H01Q3/2611 , H01Q3/2617
摘要： An intelligent digital beam former (10) in conjunction with a satellite based array antenna (20) provides a plurality of dynamically controllable antenna beams (52) for communication with subscriber units (90) on earth's surface. Interference is mitigated placing a null in the transmit and receive antenna patterns at the location of the interfering signal by adjusting digital beam forming coefficients. As the interfering signal moves relative to the satellite, the interfering signal is tracked to maintain interference mitigation. The digital beam forming coefficients are also dynamically adjusted to help maximize signal quality of communications with subscriber units.
摘要翻译： 与卫星阵列天线（20）结合的智能数字波束形成器（10）提供多个可动态可控的天线波束（52），用于与地球表面上的用户单元（90）进行通信。 通过调整数字波束形成系数，减轻干扰信号位置处的发射和接收天线方向图中的干扰。 随着干扰信号相对于卫星移动，跟踪干扰信号以维持干扰减轻。 数字波束形成系数也被动态调整，以帮助最大限度地提高与用户单元通信的信号质量。
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公开(公告)号：US6002375A
公开(公告)日：1999-12-14
申请号：US922057
申请日：1997-09-02
申请人： David Warren Corman , Richard Scott Torkington , Stephen Chih-Hung Ma , Dean Lawrence Cook , Kenneth Brice-Heames
发明人： David Warren Corman , Richard Scott Torkington , Stephen Chih-Hung Ma , Dean Lawrence Cook , Kenneth Brice-Heames
CPC分类号： H01Q1/38
摘要： A radio-frequency circuit (20) includes a hybrid integrated circuit (24) having a passive circuit element (38) and a d-c biasing circuit element (54) embedded within a first substrate (32) of a low cost and rugged first semiconducting material, and first and second active circuit elements (36, 40) embedded within second and third substrates (44, 46), respectively, of a second semiconductor material having the characterisitics of greater frangibility but higher gain than the first semiconductor material. The first and second activ circuit elements (36, 40) are substantially first and second single components (36, 40), and are each electrically coupled to the passive circuit element (38). The d-c biasing circuit element (54) is electrically coupled to the first and second active circuit elements (36, 40). The second and third substrates (44, 46) are physically coupled to the first substrate (32), which is thicker than either the second or third substrate (44, 46).
摘要翻译： 射频电路（20）包括混合集成电路（24），该混合集成电路（24）具有嵌入低成本和坚固的第一半导体材料的第一衬底（32）内的无源电路元件（38）和直流偏置电路元件（54） 以及分别嵌入第二半导体材料的第二和第三衬底（44,46）中的第一和第二有源电路元件（36,40），其具有比第一半导体材料更大的易碎性，但具有更高增益的特征。 第一和第二激活电路元件（36,40）基本上是第一和第二单个部件（36,40），并且各自电耦合到无源电路元件（38）。 d-c偏置电路元件（54）电耦合到第一和第二有源电路元件（36,40）。 第二和第三基板（44,46）物理耦合到比第二或第三基板（44,46）更厚的第一基板（32）。
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