公开(公告)号：US5696496A

公开(公告)日：1997-12-09

申请号：US647669

申请日：1996-05-15

Applicant: Rajendra Kumar

Inventor： Rajendra Kumar

IPC: G04G11/00 ,  G04G19/00 ,  H04B1/40 ,  H04M1/65 ,  H04M1/656 ,  H04Q7/00

CPC classification number: G04G11/00 ,  G04G19/00 ,  H04M1/6505 ,  H04M1/656 ,  H04M1/72502

Abstract: A portable device (10) for selective message recordation and playback and scheduling includes a portable unit (11) and an optional homebase station (12). Portable unit (11) includes a housing (15), unit controller (20), tactile input mechanism (40), audio processor (60) and video processor (80). Portable unit (11) allows textual, audible and visual message inputs and their selective playback based on time or other preselected textual, audible or visual stimulus. A selectively detachable stylus (51) may be removed to engage a touch panel (50) for making operational selections and entering information. Optional homebase station (12) may include a variety of features for supporting and supplementing those of handheld unit (11), such as a floppy drive (112) message memory, input keys (114), a battery charging circuit (115) and an external communication circuit (117).

公开(公告)号：US5649154A

公开(公告)日：1997-07-15

申请号：US547047

申请日：1995-10-23

Applicant: Rajendra Kumar ,  Paul G. Emerson

Inventor： Rajendra Kumar ,  Paul G. Emerson

IPC: G06F12/08

CPC classification number: G06F12/0897 ,  G06F12/0862

Abstract: A cache memory system with a secondary cache integrated with a direct mapped primary cache in a single structure preferably constructed on a VLSI chip. The secondary cache uses the same output data bitlines, sense amplifiers, and bus drivers as the direct mapped cache. In a first machine cycle, input address tags are simultaneously compared to tag bits in the primary cache and the secondary cache. If the comparison results in a miss in the primary cache and a hit in the secondary cache, the secondary cache data is fed to the microprocessor in the next machine cycle, precluding the need for a main memory access. Thus, allowing data to be read directly from the secondary cache without using an extra machine cycle to load it first into the direct cache. The secondary cache comprises a miss cache which is loaded from main memory with data missing from the primary cache in the first machine cycle. Alternatively, the secondary cache comprises a victim cache which is loaded with a line of the primary cache which is replaced after loading missed data from main memory.

Abstract translation: 一种高速缓冲存储器系统，其具有与直接映射的一级高速缓存集成的二级缓存，其中单个结构优选地构造在VLSI芯片上。 二级缓存使用相同的输出数据位线，读出放大器和总线驱动器作为直接映射缓存。 在第一个机器周期中，输入地址标签与主缓存和二级缓存中的标签位同时进行比较。 如果比较导致主缓存中的未命中和次级高速缓存中的命中，则次级高速缓存数据在下一个机器周期中被馈送到微处理器，排除了对主存储器访问的需要。 因此，允许直接从二级缓存读取数据，而不用额外的机器周期将其首先加载到直接高速缓存中。 次级高速缓存包括从主存储器加载的未命中高速缓存，其中在第一机器周期中从主缓存中缺少数据。 或者，辅助高速缓存包括被加载有主缓存的行的受害缓存，在从主存储器加载丢失的数据之后被替换。

公开(公告)号：US5616906A

公开(公告)日：1997-04-01

申请号：US368036

申请日：1995-01-03

Applicant: Rajendra Kumar

Inventor： Rajendra Kumar

IPC: G06K7/10

CPC classification number: G06K7/10881

Abstract: A grip held and grip operable data entry device for data collection by an operator having a hand includes a narrow grip unit for entry of data and a housing extension for carrying certain components that would otherwise have to be carried within grip unit, allowing grip unit to be narrow for comfortable and secure gripping without elimination of any desired functionality. Grip unit includes main housing having a first side and a second side, the first housing grasped by the operator's hand with the thumb extending along the first side and the middle finger engaging the second side. A housing extension extends from and is carried by main housing behind the operator's thumb such that operator support for holding device is furnished by the operator's thumb and the operator's middle finger acting upon the first side and the second side of main housing, leaving the index finger free to engage and disengage a pushbutton. Grip unit eliminates or minimizes operator stress and fatigue, permits holster-type carrier operation, includes at least one automatic identification mechanism such as scanner module, provides full functionality and allows keypad entry in handheld and table-top orientation.

Abstract translation: 用于具有手的操作者进行数据采集的把手握持和抓握可操作的数据输入装置包括用于输入数据的窄握持单元和用于承载某些部件的壳体延伸部分，否则这些部件将不得不在手柄单元内承载， 在不消除任何所需功能的情况下，可以保持舒适和安全的抓地力。 夹持单元包括具有第一侧和第二侧的主壳体，第一壳体由操作者的手握住，拇指沿着第一侧延伸并且中指接合第二侧。 外壳延伸部从操作者拇指的后面的主壳体延伸出来，由操作人员的拇指和操作者的中指作用在主壳体的第一面和第二面上，由操作人员的拇指操作者支撑， 免费接触和解除按钮。 手柄单元消除或最小化操作者的压力和疲劳，允许皮套式载体操作，包括至少一个自动识别机构，如扫描仪模块，提供完整的功能，并允许键盘在手持式和桌面方向进入。

公开(公告)号：US5484989A

公开(公告)日：1996-01-16

申请号：US146713

申请日：1993-11-01

Applicant: Rajendra Kumar ,  Steven E. Brooks ,  Michael J. Gallo

Inventor： Rajendra Kumar ,  Steven E. Brooks ,  Michael J. Gallo

IPC: G06F15/02 ,  G06K7/00

CPC classification number: G06K13/0875 ,  G06F15/0216 ,  G06K13/0893 ,  G06K7/0021 ,  G06K7/006 ,  G06K7/0091 ,  Y10S277/906

Abstract: An electronic terminal of the type employing a card reading device mounted within the interior thereof accessible through an input port formed in a wall of the terminal. A shield formed of an elastomeric material is mounted adjacent the input port of the card reader to prevent the entrance of debris into the interior of the terminal. The shield provides at least two opposing movable overlapping flaps extending over the card reader input port. The flaps are readily flexible to allow a card to slide therebetween, and automatically flex back to an overlapping closed position when the card is withdrawn. Locator pins and mating holes are provided in said flaps to assure a consistent return to the closed and sealed position. In one embodiment, the shield is made from two half sections which may be either separated or connected via a flexible bridge. In another embodiment, end inserts are provided between said half sections which may also be separate members or attached to said half sections via corresponding flexible bridges.

Abstract translation: 一种使用安装在其内部的读卡装置的电子终端，可通过形成在终端的墙壁中的输入端口进入。 由弹性体材料形成的屏蔽件邻近读卡器的输入端口安装，以防止碎屑进入端子的内部。 屏蔽件提供延伸在读卡器输入端口上的至少两个相对的可移动的重叠翼片。 襟翼容易灵活，以允许卡在其间滑动，并且当卡被拉出时自动地弹回到重叠的关闭位置。 定位销和配合孔设置在所述翼片中，以确保一致地返回到封闭和密封位置。 在一个实施例中，屏蔽由两个半部分制成，两个半部分可以通过柔性桥分开或连接。 在另一个实施例中，端部插入件设置在所述半部分之间，所述半部分也可以是分离的部件，或者通过相应的柔性桥连接到所述半部分。

公开(公告)号：US5294782A

公开(公告)日：1994-03-15

申请号：US767270

申请日：1991-09-27

Applicant: Rajendra Kumar

Inventor： Rajendra Kumar

IPC: G06K7/00 ,  G06K7/10 ,  G06K17/00 ,  G07F7/02 ,  G07F7/10 ,  G07G1/00 ,  G07G1/12 ,  G07G5/00

CPC classification number: G07G5/00 ,  G06K17/0022 ,  G06K7/10881 ,  G06K7/109 ,  G06Q20/341 ,  G06Q20/343 ,  G07F7/02 ,  G07F7/0886 ,  G07F7/1008 ,  G07G1/0036 ,  G07G1/0045 ,  G07G1/0081

Abstract: A handheld, portable device (10) for processing point of sale transactions includes a housing (20), a magnetic card reader (40) for reading credit card information, the reader (40) carried within the housing (20) substantially adjacent to the first end (23) of the housing (20), a numeric keyboard (50) and an alphabetic keyboard (60) for entering customer information, and a barcode scanner (70) for scanning product identification information, the barcode scanner (70) carried within the housing (20) substantially adjacent to a second end (24) of the housing (20). Also included is a display (80) for displaying selected information, a printer (90) for printing a customer receipt, a communications assembly (110) for furnishing the information needed to obtain transaction approval, and a processor (130) for receiving the information, and controlling the display (80), the printer (90) and the communications assembly (110). Device (10) furnishes all functions necessary to facilitate and complete a point of sale credit card transaction. The housing (20) configuration allows handsfree operation for most functions. The arrangement of components within device (10) provides a uniform distribution of weight and makes supporting device (10) with one hand comfortable and relatively effortless.

Abstract translation: 用于处理销售点交易的手持式便携式设备（10）包括：外壳（20），用于读取信用卡信息的磁卡读取器（40），所述读取器（40）承载在所述壳体（20）内， 壳体（20）的第一端（23），用于输入客户信息的数字键盘（50）和字母键盘（60）以及用于扫描产品识别信息的条形码扫描器（70），携带有条形码扫描仪 在基本上邻近壳体（20）的第二端（24）的壳体（20）内。 还包括用于显示所选择的信息的显示器（80），用于打印客户接收的打印机（90），用于提供获得交易批准所需的信息的通信组件（110），以及用于接收信息的处理器 ，并且控制显示器（80），打印机（90）和通信组件（110）。 设备（10）提供便利和完成销售点信用卡交易所需的所有功能。 外壳（20）配置允许大多数功能的免提操作。 装置（10）内的组件的布置提供了均匀的重量分布，并且使得一只手的支撑装置（10）舒适且相对轻松。

公开(公告)号：US5165051A

公开(公告)日：1992-11-17

申请号：US799857

申请日：1991-11-27

Applicant: Rajendra Kumar

Inventor： Rajendra Kumar

IPC: H03L7/087 ,  H03L7/099

CPC classification number: H03L7/087 ,  H03L7/0991

Abstract: This is a method and associated apparatus for accurately and quickly estimating the amplitude, frequency and phase of a signal of interest. The method comprises the steps of, inputting the signal of interest; generating a reference signal with adjustable amplitude, frequency and phase at an output thereof; mixing the signal of interest with the reference signal and a signal 90.degree. out of phase with the reference signal to provide a pair of quadrature sample signals comprising respectively a difference between the signal of interest and the reference signal and a difference between the signal of interest and the signal 90.degree. out of phase with the reference signal; using the pair of quadrature sample signals to compute estimates of the amplitude, frequency, and phase of an error signal comprising the difference between the signal of interest and the reference signal employing a least squares estimation; adjusting the amplitude, frequency, and phase of the reference signal from the numerically controlled oscillator in a manner which drives the error signal towards zero; and, outputting the estimates of the amplitude, frequency, and phase of the error signal in combination with the reference signal to produce a best estimate of the amplitude, frequency, and phase of the signal of interest. The preferred method includes the step of providing the error signal as a real time confidence measure as to accuracy of the estimates wherein the closer the error signal is to zero, the higher the probability that the estimates are accurate. A matrix in the estimation algorithm provides an estimate of the variance of the estimation error.

Abstract translation: 这是一种用于准确和快速地估计感兴趣的信号的幅度，频率和相位的方法和相关联的装置。 该方法包括以下步骤：输入感兴趣的信号; 在其输出端产生具有可调幅度，频率和相位的参考信号; 将感兴趣的信号与参考信号混合，以及与参考信号90°异相的信号，以提供一对正交采样信号，分别包括感兴趣的信号和参考信号之间的差异以及感兴趣的信号之间的差 与参考信号90°异相信号; 使用一对正交采样信号来计算包括使用最小二乘估计的感兴趣信号和参考信号之间的差的误差信号的幅度，频率和相位的估计; 以将驱动误差信号向零的方式调制来自数控振荡器的参考信号的振幅，频率和相位; 并输出与参考信号相结合的误差信号的幅度，频率和相位的估计，以产生感兴趣的信号的幅度，频率和相位的最佳估计。 优选的方法包括将误差信号提供为关于估计精度的实时置信度量度的步骤，其中误差信号越接近于零，估计精度越高。 估计算法中的矩阵提供估计误差的方差的估计。

公开(公告)号：USD303663S

公开(公告)日：1989-09-26

申请号：US914741

申请日：1986-10-01

Applicant: Rajendra Kumar ,  Kim R. Lewis

Designer： Rajendra Kumar ,  Kim R. Lewis

公开(公告)号：US4621189A

公开(公告)日：1986-11-04

申请号：US785604

申请日：1985-10-08

Applicant: Rajendra Kumar ,  Robert F. Meyerson

Inventor： Rajendra Kumar ,  Robert F. Meyerson

IPC: G06K7/10

CPC classification number: G06K7/10881 ,  G06K7/109

Abstract: A hand held data entry apparatus wherein a main body portion is formed to be held in one hand while data is entered through a keyboard by the fingers of the other hand. An optical scanning head is mechanically and electrically connected to the main body portion through an arrangement which permits the optical scanning head to be connected to the main body portion in more than one relative position. The scanning head sensor is pointed in a direction such that when the device is held in one hand the other hand may be utilized for entering data through the keyboard and at the same time the scanning head is directed toward the surface to be scanned, without need to reposition the main body portion.

Abstract translation: 一种手持式数据输入装置，其中，通过另一只手的手指通过键盘输入数据时，主体部分被形成为保持在一只手中。 光学扫描头通过允许光学扫描头在多于一个相对位置上连接到主体部分的装置机械地和电连接到主体部分。 扫描头传感器指向一个方向，使得当装置一只手握住时，另一只手可以用于通过键盘输入数据，同时扫描头指向待扫描的表面，而不需要 以重新定位主体部分。

公开(公告)号：US08831082B2

公开(公告)日：2014-09-09

申请号：US13762048

申请日：2013-02-07

Applicant: Rajendra Kumar

Inventor： Rajendra Kumar

IPC: H03H7/30 ,  H04L27/01

CPC classification number: H04L25/03 ,  H04L25/0307 ,  H04L25/03891 ,  H04L2025/03426 ,  H04L2025/03726

Abstract: Various embodiments described herein are directed to methods and systems for blind mode adaptive equalizer system to recover complex valued data symbols from the signal transmitted over time-varying dispersive diversity wireless channels. For example, various embodiments may utilize an architecture comprised of a bank of estimation units, a normalizing gain estimator, a DSP unit and a feedback shift register providing the equalizer feedback state vector. The estimation unit may be further comprised of a multiplicity of adaptive algorithms providing various filtered estimates of the data symbol to the DSP unit or providing the joint estimate of the transmitted data symbol.

Abstract translation: 本文描述的各种实施例涉及用于盲模式自适应均衡器系统的方法和系统，以从随时变色散分集无线信道发射的信号中恢复复值数据符号。 例如，各种实施例可以利用由一组估计单元，归一化增益估计器，DSP单元和提供均衡器反馈状态向量的反馈移位寄存器组成的架构。 估计单元还可以包括多个自适应算法，该数据符号向DSP单元提供数据符号的各种滤波估计值，或者提供发送数据符号的联合估计。

公开(公告)号：US20140140387A1

公开(公告)日：2014-05-22

申请号：US14084503

申请日：2013-11-19

Applicant: Rajendra Kumar

Inventor： Rajendra Kumar

IPC: H04L25/03 ,  H04B1/10

CPC classification number: H04L25/03885 ,  H04B1/1081 ,  H04L25/0204 ,  H04L25/0307 ,  H04L25/03292 ,  H04L27/3416 ,  H04L27/3845

Abstract: A blind mode adaptive equalizer system to recover the in general complex valued data symbols from the signal transmitted over time-varying dispersive wireless channels is disclosed comprising an adaptive communication receiver for the demodulation and detection of digitally modulated signals received over wireless communication channels exhibiting multipath and fading, the receiver comprising an RF front end, an RF to complex baseband converter, a band limiting matched filter, a channel gain normalizer, a blind mode adaptive equalizer with hierarchical structure, an initial data segment recovery circuit, a differential decoder, a complex baseband to data bit mapper, and an error correction code decoder and de-interleaver.

Abstract translation: 公开了一种盲模式自适应均衡器系统，用于从通过随时间变化的分散无线信道发送的信号中恢复一般复数值数据符号，包括用于解调和检测经由表示多径的无线通信信道上接收的数字调制信号的自适应通信接收机， 衰减，接收机包括RF前端，RF到复基带转换器，带限匹配滤波器，信道增益归一化器，具有分层结构的盲模式自适应均衡器，初始数据段恢复电路，差分解码器，复数 基带到数据位映射器，以及纠错码解码器和解交织器。