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    • 1. 发明授权
    • Wireless local loop terminal and system having high speed, high resolution, digital-to-analog converter with off-line sigma-delta conversion and storage
    • 具有高速,高分辨率,数模转换器的无线本地环路终端和系统,具有离线Σ-Δ转换和存储
    • US06489908B2
    • 2002-12-03
    • US09846440
    • 2001-04-30
    • Carl M. PanasikThayamkulangara Ramaswamy Viswanathan
    • Carl M. PanasikThayamkulangara Ramaswamy Viswanathan
    • H03M166
    • H04B14/06H03M3/50
    • A wireless local loop apparatus and corresponding system having an improved DAC operable at higher speed than heretofore achievable which exploits the sigma-delta principle in a different way. More particularly, the invention comprises a wireless local loop terminal (302) and corresponding system (300) that implement a digital-to-analog conversion circuit (105) including a storage means (110), such as a read only memory, for storing delta-sigma analog sequences corresponding to all possible values of a digital input (106) coupled to a plurality of one-bit digital to analog converters (120, 122, 124, 126). Each of the digital-to-analog converters (120, 122, 124, 126) are clocked by multi-phase clocks, such that each phase applied to each one of the digital-to-analog converters (120, 122, 124, 126) is delayed with respect to one another by the oversampling period. An summer is coupled to each digital-to-analog converter (120, 122, 124, 126) for summing each output from each digital-to-analog converter (120, 122, 124, 126) to generate an analog output. Hereby, the digital-to-analog conversion circuit (105) according to the invention emulates a delta-sigma digital-to-analog converter having both high speed and high resolution.
    • 一种无线本地环路装置和相应的系统,其具有可以以比以前可实现的更高的速度工作的改进的DAC,其以不同的方式利用了Σ-Δ原理。 更具体地说,本发明包括实现数模转换电路(105)的无线本地环路终端(302)和对应系统(300),数字 - 模拟转换电路(105)包括诸如只读存储器的存储装置(110) 对应于耦合到多个一位数模转换器(120,122,124,126)的数字输入(106)的所有可能值的Δ-Σ模拟序列。 每个数模转换器(120,122,124,126)由多相时钟计时,使得施加到数模转换器(120,122,124,126中的每一个)的每个相位 )在过采样期间相对于彼此延迟。 加法器耦合到每个数模转换器(120,122,124,126),用于对来自每个数模转换器(120,122,124,126)的每个输出求和以产生模拟输出。 因此,根据本发明的数模转换电路(105)模拟具有高速和高分辨率的三角形数模转换器。
    • 2. 发明授权
    • Wireless user terminal and system having high speed, high resolution, digital-to-analog converter with off-line sigma delta conversion and storage
    • 无线用户终端和具有高速,高分辨率,数模转换器的离线西格玛delta转换和存储的系统
    • US07020219B2
    • 2006-03-28
    • US09846846
    • 2001-04-30
    • Carl M. PanasikThayamkulangara Ramaswamy Viswanathan
    • Carl M. PanasikThayamkulangara Ramaswamy Viswanathan
    • H04L27/14H04B1/10
    • H03M3/50H04W4/18H04W88/02
    • A wireless communications apparatus and corresponding system having an improved DAC operable at higher speed than heretofore achievable which exploits the sigma-delta principle in a different way. More particularly, the invention comprises a wireless user terminal (302) and corresponding system (300) that implement a digital-to-analog conversion circuit (105) including a storage means (110), such as a read only memory, for storing delta-sigma analog sequences corresponding to all possible values of a digital input (106) coupled to a plurality of one-bit digital to analog converters (120, 122, 124, 126). Each of the digital-to-analog converters (120, 122, 124, 126) are clocked by multi-phase clocks, such that each phase applied to each one of the digital-to-analog converters (120, 122, 124, 126) is delayed with respect to one another by the oversampling period. An summer is coupled to each digital-to-analog converter (120, 122, 124, 126) for summing each output from each digital-to-analog converter (120, 122, 124, 126) to generate an analog output. Hereby, the digital-to-analog conversion circuit (105) according to the invention emulates a delta-sigma digital-to-analog converter having both high speed and high resolution.
    • 一种无线通信装置和相应的系统,其具有可以比以前可实现的更高速度操作的改进的DAC,其以不同的方式利用了Σ-Δ原理。 更具体地,本发明包括实现数模转换电路(105)的无线用户终端(302)和对应系统(300),数字 - 模拟转换电路(105)包括存储装置(110),诸如只读存储器,用于存储三角形 -Sigma模拟序列对应于耦合到多个一位数模转换器(120,122,124,126)的数字输入(106)的所有可能值。 每个数模转换器(120,122,124,126)由多相时钟计时,使得施加到数模转换器(120,122,124,126中的每一个)的每个相位 )在过采样期间相对于彼此延迟。 加法器耦合到每个数模转换器(120,122,124,126),用于对来自每个数模转换器(120,122,124,126)的每个输出求和以产生模拟输出。 因此,根据本发明的数模转换电路(105)模拟具有高速和高分辨率的三角形数模转换器。
    • 4. 发明授权
    • Handheld portable automatic emergency alert system and method
    • 手持式便携式自动应急报警系统及方法
    • US07181192B2
    • 2007-02-20
    • US10802449
    • 2004-03-16
    • Carl M. PanasikJames F. Salzman
    • Carl M. PanasikJames F. Salzman
    • H04M11/04
    • H04M1/72538H04W4/90H04W8/18H04W76/50
    • In one embodiment, an automated emergency alert system includes a handheld portable communication device operable to initiate communication over a wireless telecommunications network, a dynamic sensor operable to generate an acceleration profile for the device, and a memory operable to store one or more predefined acceleration profiles each associated with an emergency event. The system also includes one or more processors collectively operable to (1) receive from the dynamic sensor an acceleration profile for the device; (2) access one or more of the stored predefined acceleration profiles; (3) compare the received acceleration profile to the one or more stored predefined acceleration profiles to determine if the acceleration profile substantially matches a predefined acceleration profile; and (4) if it is determined that the acceleration profile substantially matches a stored predefined acceleration profile, initiate a communication using the network to one or more emergency call centers to notify the call center that the emergency event has occurred.
    • 在一个实施例中,自动化紧急警报系统包括可操作以通过无线电信网络发起通信的手持便携式通信设备,可操作以产生用于设备的加速度曲线的动态传感器,以及可操作以存储一个或多个预定加速度分布 每个都与紧急事件相关联。 该系统还包括一个或多个处理器,可共同操作以(1)从动态传感器接收装置的加速度曲线; (2)访问一个或多个所存储的预定加速度分布; (3)将所接收的加速度曲线与所述一个或多个存储的预定加速度曲线进行比较,以确定所述加速度曲线是否基本上匹配预定加速度曲线 和(4)如果确定加速度曲线基本上与存储的预定义的加速度曲线匹配,则启动使用网络的通信到一个或多个紧急呼叫中心以通知呼叫中心紧急事件已经发生。
    • 6. 发明授权
    • Electronic device precision location via local broadcast signals
    • 电子设备通过本地广播信号精确定位
    • US06806830B2
    • 2004-10-19
    • US10036700
    • 2001-12-31
    • Carl M. PanasikSteven C. LazarMadison F. Pedigo
    • Carl M. PanasikSteven C. LazarMadison F. Pedigo
    • G01S302
    • G01S5/0226G01C21/206G01S5/02G01S5/021G01S5/10
    • A location determination apparatus, method and system (10, 23, 26, 32, 36, 48, 52, 60, 64, 74, 78, 84, 90, 106) that is an improvement upon existing location determining techniques. The invention enables precision indoor location determination through the use of non-DTV terrestrial broadcast signals (e.g. one way, wide area, dissemination of information)(20), or re-broadcast signals (44, 56, 70, 80) of the proposed (terrestrial based) digital satellite radio relay transmitters (42, 54) to provide position location. This solution does not require a local receiver to correct for long distance propagation dispersion, particularly for the satellite relay, as the digital radio satellites are already synchronized to GPS time. More specifically, the invention discloses two significant location detection concepts: A) local terrestrial transmitters (12) provide information used to determine the location of an electronic apparatus; and B) local re-transmitters of satellite-distributed programming (42, 54) provide information used to determine the location of an electronic apparatus.
    • 一种位置确定设备,方法和系统(10,23,26,32,36,48,52,60,64,74,78,84,90,106),其是对现有位置确定技术的改进。 本发明通过使用非DTV地面广播信号(例如,单向,广域,信息传播)(20)或重新广播所提出的广播信号(44,56,70,80)的信号来实现精确的室内位置确定 (地面)数字卫星无线电中继发射机(42,54)以提供位置定位。 该解决方案不需要本地接收机来校正长距离传播色散,特别是卫星中继,因为数字无线电卫星已经与GPS时间同步。 更具体地,本发明公开了两个重要的位置检测概念:A)本地地面发射机(12)提供用于确定电子设备位置的信息; 和B)卫星分布式节目(42,54)的本地重新发射机提供用于确定电子设备的位置的信息。
    • 9. 发明授权
    • Base station having high speed, high resolution, digital-to-analog converter with off-line sigma delta conversion and storage
    • 基站具有高速,高分辨率,数模转换器,具有离线西格玛delta转换和存储
    • US06515605B2
    • 2003-02-04
    • US09846429
    • 2001-04-30
    • Carl M. PanasikT. R. Viswanathan
    • Carl M. PanasikT. R. Viswanathan
    • H03M300
    • H03M3/50
    • A wireless base station having an improved DAC operable at higher speed than heretofore achievable which exploits the sigma-delta principle in a different way. More particularly, the invention comprises a base station 300 that implement a digital-to-analog conversion circuit (105) including a storage means (110), such as a read only memory, for storing delta-sigma analog sequences corresponding to all possible values of a digital input (106) coupled to a plurality of one-bit digital to analog converters (120, 122, 124, 126). Each of the digital-to-analog converters (120, 122, 124, 126) are clocked by multi-phase clocks, such that each phase applied to each one of the digital-to-analog converters (120, 122, 124, 126) is delayed with respect to one another by the oversampling period. An summer is coupled to each digital-to-analog converter (120, 122, 124, 126) for summing each output from each digital-to-analog converter (120, 122, 124, 126) to generate an analog output. Hereby, the digital-to-analog conversion circuit (105) according to the invention emulates a delta-sigma digital-to-analog converter having both high speed and high resolution.
    • 一种无线基站,其具有可以比以前可实现的更高速度操作的改进的DAC,其以不同的方式利用了Σ-Δ原理。 更具体地说,本发明包括实现数模转换电路(105)的基站300,数字 - 模拟转换电路(105)包括诸如只读存储器的存储装置(110),用于存储对应于所有可能值的Δ-Σ模拟序列 耦合到多个一位数模转换器(120,122,124,126)的数字输入(106)。 每个数模转换器(120,122,124,126)由多相时钟计时,使得施加到数模转换器(120,122,124,126中的每一个)的每个相位 )在过采样期间相对于彼此延迟。 加法器耦合到每个数模转换器(120,122,124,126),用于对来自每个数模转换器(120,122,124,126)的每个输出求和以产生模拟输出。 因此,根据本发明的数模转换电路(105)模拟具有高速和高分辨率的三角形数模转换器。