公开(公告)号：US07277411B2

公开(公告)日：2007-10-02

申请号：US10226073

申请日：2002-08-21

申请人： Ofer Shneyour ,  Guy Ben-Artzi ,  Levi Schultz ,  Yaron Naim ,  David Cohen

发明人： Ofer Shneyour ,  Guy Ben-Artzi ,  Levi Schultz ,  Yaron Naim ,  David Cohen

IPC分类号： H04J3/00

CPC分类号： H04L1/08 ,  H04B7/2618

摘要： Data is transmitted and received in a TDMA frequency hopping system by allocating two or more time slots for transmitting identical data packets, and transmitting the identical data packets in the allocated time slots at different frequencies. This requires the transmission of redundant information but reduces the likelihood of data loss. An adaptive scheme may be employed wherein more time slots are allocated for the repeated data transmissions in areas of poor reception while fewer time slots are allocated for the repeated data transmissions in areas of higher quality reception or when higher bandwidth is required.

摘要翻译： 通过分配用于发送相同数据分组的两个或更多个时隙并在不同频率的分配的时隙中发送相同的数据分组，在TDMA跳频系统中发送和接收数据。 这需要传输冗余信息，但是降低数据丢失的可能性。 可以采用自适应方案，其中在接收不良的区域中为重复的数据传输分配更多的时隙，而在较高质量接收的区域中或当需要更高的带宽时，为更重要的数据传输分配较少的时隙。

公开(公告)号：US6166591A

公开(公告)日：2000-12-26

申请号：US209284

申请日：1998-12-11

申请人： Levi Schultz ,  Yaron Moas

发明人： Levi Schultz ,  Yaron Moas

IPC分类号： G05F1/10

CPC分类号： G05F1/561

摘要： A novel closed loop FET biasing circuit featuring a standard logic control format for operational mode switching between operating states of an FET power amplifier. In a preferred embodiment, an FET gate bias control device is provided for configuring a gate bias circuit in an FET power amplifier to accommodate a broad range of output power levels, wherein the configuration is responsive to a command which establishes an FET bias condition. The gate bias control device of the present invention comprises a circuit having a controllable switching unit which connects a plurality of resistors in the source-drain voltage circuit portion individually or in parallel to provide a multiple of resistance values each corresponding to one of four amplifier operating modes. The controllable switching unit responds to a set of logic control signals, and therefore greatly simplifies the transition between operating modes, while maintaining FET bias conditions which insure operational stability without problems associated with temperature and loading fluctuations.

摘要翻译： 一种新颖的闭环FET偏置电路，具有标准逻辑控制格式，用于FET功率放大器的工作状态之间的工作模式切换。 在优选实施例中，提供FET栅极偏置控制装置，用于配置FET功率放大器中的栅极偏置电路以适应宽范围的输出功率电平，其中该配置响应于建立FET偏置条件的命令。 本发明的栅极偏置控制装置包括具有可控开关单元的电路，其将源极 - 漏极电压电路部分中的多个电阻单独或并联连接以提供多个电阻值，每个电阻值对应于四个放大器操作中的一个 模式。 可控开关单元响应一组逻辑控制信号，因此极大地简化了工作模式之间的转换，同时保持了FET偏置条件，确保了运行稳定性，而没有与温度和负载波动相关的问题。