公开(公告)号：US6085073A

公开(公告)日：2000-07-04

申请号：US33047

申请日：1998-03-02

申请人： Keith Charles Palermo ,  Kurt Albert Kallman

发明人： Keith Charles Palermo ,  Kurt Albert Kallman

IPC分类号： H04L27/152 ,  H04B1/16

CPC分类号： H04L27/1525

摘要： A method and system for reducing the sampling rate of a signal for use with high modulation index frequency modulated signals reduces the power consumption and processing requirements of the digital signal processing equipment which performs the demodulation. In a preferred embodiment, a high modulation index FM signal is divided into in-phase and quadrature phase components by a downconverter (FIG. 1, 10). These components are sampled by analog to digital converters (20, 21) and input to a delay element (40, 41). The resulting delayed and undelayed samples are conveyed to downsamplers (60-63) where the sampling rate is reduced. The undelayed in-phase and delayed quadrature phase components are multiplied together by a first multiplier (70) while the undelayed quadrature phase and delayed in-phase components are multiplied together by a second multiplier (71). The output of the second multiplier (71) is then subtracted from the output of the first multiplier (70) by a subtractor (80) which outputs baseband audio or data.

摘要翻译： 用于降低高调制频率调制信号使用的信号的采样率的方法和系统降低了进行解调的数字信号处理设备的功耗和处理要求。 在优选实施例中，高调制度调频信号通过下变频器被分成同相和正交相分量（图1,10）。 这些组件由模数转换器（20,21）采样并输入到延迟元件（40,41）。 所得到的延迟和未延迟的样品被传送到采样速率降低的下采样器（60-63）。 不延时的同相和延迟正交相位分量由第一乘法器（70）相乘，而不延时正交相位和延迟的同相分量由第二乘法器（71）相乘。 然后，通过输出基带音频或数据的减法器（80）从第一乘法器（70）的输出中减去第二乘法器（71）的输出。

公开(公告)号：US20080130807A1

公开(公告)日：2008-06-05

申请号：US11566222

申请日：2006-12-03

申请人： Ghassan Chehade Maalouli ,  Justin Lamar Allen ,  Keith Charles Palermo

发明人： Ghassan Chehade Maalouli ,  Justin Lamar Allen ,  Keith Charles Palermo

IPC分类号： H04L7/00 ,  H04B17/00

CPC分类号： H04L25/025 ,  H04L25/03057

摘要： An RF receiver (12) includes a channel estimator (52). The channel estimator (52) includes a channel estimation filter (82), error signal generator (84), and normalized Least-Mean-Square (NLMS) filter-definition generator 36. The filter (82), error generator (84) and NLMS filter-definition generator (86) function together as an adaptive estimator. An error signal (90) is formed with a received signal (48). The filter (82) filters an estimated transmit signal (74) constructed from lower confidence decision data (66) and higher confidence known preamble data (30″). .An adaptive filter definition (94) is formed in a feedback, loop which minimizes correlation between the estimated transmit signal (74) and the error signal (90). A convergence signal (122) is modulated in synchronism with the changes between lower and higher confidence data in the estimated transmit signal (74).

摘要翻译： RF接收机（12）包括信道估计器（52）。 信道估计器（52）包括信道估计滤波器（82），误差信号发生器（84）和归一化最小均方（NLMS）滤波器清除发生器36.滤波器（82），误差发生器（84）和 NLMS滤波器定义生成器（86）一起作为自适应估计器。 误差信号（90）由接收信号（48）形成。 滤波器（82）对由低置信决定数据（66）和较高的置信度已知前导码数据（30“）构成的估计发射信号（74）进行滤波。 自适应滤波器定义（94）形成在反馈环路中，其使估计的发射信号（74）和误差信号（90）之间的相关性最小化。 收敛信号（122）与所估计的发射信号（74）中的较低和较高置信度数据之间的变化同步地被调制。

公开(公告)号：US06829229B1

公开(公告)日：2004-12-07

申请号：US09570129

申请日：2000-05-12

申请人： Keith Charles Palermo ,  Mike Francis Durkin

发明人： Keith Charles Palermo ,  Mike Francis Durkin

IPC分类号： H04J7500

CPC分类号： H04B1/406 ,  H04J3/0682

摘要： A signal calibrator (14) for a software-defined communications device (10) that enables device communications signals to be transmitted in a manner that maximally decouples the calibrator (14) from the device hardware (40), and that simplifies the design and reduces the cost of the communications device (10). The calibrator (14) includes a software modulator (16) for generating a nonstop stream of samples including zero valued samples and non-zero valued waveform bursts, and a software demodulator (18) connected to the software modulator (16) via a closed loop feedback path (20) that receives a nonstop stream of samples. The non-zero valued samples create radio emissions. The software demodulator (18) is for determining a timing error of the transmission sample and for transmitting a timing error correction value to the software modulator (16) via the closed loop feedback path (20). The timing error correction value enables the software modulator (16) to adjust a transmission time of a subsequent waveform burst to compensate for both unknown hardware delays and RF signal propagation delays.

摘要翻译： 一种用于软件定义的通信设备（10）的信号校准器（14），其使设备通信信号能够以最大程度地将校准器（14）与设备硬件（40）去耦的方式传输，并且简化了设计并减少了 通信设备（10）的成本。 校准器（14）包括软件调制器（16），用于产生包括零值样本和非零值波形突发的不间断样本流，以及软件解调器（18），其通过闭环连接到软件调制器（16） 反馈路径（20），其接收不间断的样本流。 非零值样本产生无线电发射。 软件解调器（18）用于确定发送样本的定时误差，并且用于经由闭环反馈路径（20）向软件调制器（16）发送定时误差校正值。 定时误差校正值使得软件调制器（16）能够调整后续波形脉冲串的传输时间以补偿未知硬件延迟和RF信号传播延迟。

公开(公告)号：US07561864B2

公开(公告)日：2009-07-14

申请号：US11566222

申请日：2006-12-03

申请人： Ghassan Chehade Maalouli ,  Justin Lamar Allen ,  Keith Charles Palermo

发明人： Ghassan Chehade Maalouli ,  Justin Lamar Allen ,  Keith Charles Palermo

IPC分类号： H04B1/10

CPC分类号： H04L25/025 ,  H04L25/03057

摘要： An RF receiver (12) includes a channel estimator (52). The channel estimator (52) includes a channel estimation filter (82), error signal generator (84), and normalized Least-Mean-Square (NLMS) filter-definition generator 86. The filter (82), error generator (84) and NLMS filter-definition generator (86) function together as an adaptive estimator. An error signal (90) is formed with a received signal (48). The filter (82) filters an estimated transmit signal (74) constructed from lower confidence decision data (66) and higher confidence known preamble data (30″). An adaptive filter definition (94) is formed in a feedback, loop which minimizes correlation between the estimated transmit signal (74) and the error signal (90). A convergence signal (122) is modulated in synchronism with the changes between lower and higher confidence data in the estimated transmit signal (74).

摘要翻译： RF接收机（12）包括信道估计器（52）。 信道估计器（52）包括信道估计滤波器（82），误差信号发生器（84）和归一化最小均方（NLMS）滤波器定义生成器86.滤波器（82），误差发生器（84）和 NLMS滤波器定义生成器（86）一起作为自适应估计器。 误差信号（90）由接收信号（48）形成。 滤波器（82）对由低置信决定数据（66）和较高的置信度已知前导码数据（30“）构成的估计发射信号（74）进行滤波。 自适应滤波器定义（94）形成在使估计的发射信号（74）和误差信号（90）之间的相关性最小化的反馈环路中。 收敛信号（122）与所估计的发射信号（74）中的较低和较高置信度数据之间的变化同步地被调制。

公开(公告)号：US06181734B2

公开(公告)日：2001-01-30

申请号：US09086804

申请日：1998-05-29

申请人： Keith Charles Palermo

发明人： Keith Charles Palermo

IPC分类号： H04B138

CPC分类号： H04B1/0032 ,  H04B1/0003 ,  H04B1/406

摘要： A radio is disclosed in which different waveforms may be utilized. The radio includes a memory (801) in which software (802, 805, 806) for specific waveforms is stored. The radio further includes one or more processors (807, 809, 811) which extract waveform specific software to process information for transmission or reception. All processing of the information between reception or reproduction of speech and transmission and reception of radio frequency signals, respectively, is performed in software.

摘要翻译： 公开了可以使用不同波形的无线电设备。 无线电装置包括存储有用于特定波形的软件（802,805,806）的存储器（801）。 无线电还包括一个或多个处理器（807,809,811），其提取波形特定软件以处理用于发送或接收的信息。 语音的接收或再现与射频信号的发送和接收之间的信息的所有处理分别以软件进行。