公开(公告)号：US20040204036A1

公开(公告)日：2004-10-14

申请号：US10289267

申请日：2002-11-05

申请人： Fodus Communications, Inc.

发明人： Steve S. Yang

IPC分类号： H04B001/26 ,  H04B015/00 ,  H04M001/00 ,  H04B001/38

CPC分类号： H04B1/403

摘要： A configurable dual-band RF transceiver with a cascaded frequency conversion scheme (DBXVR) is disclosed for the processing of any selected RF channel signal specified by the open standard IEEE 802.11 a/b/g for Wireless LAN. The DBXVR comprises two switchably connected antennae for receiving and transmitting any selected RF channel signal and two subsets of signal processing hardware. The first signal processing subset is designed to perform all related frequency conversion, signal filtering and amplification between the b/g-band and its corresponding Baseband Inphase (I) and Quadrature (Q) signals. The second signal processing subset is designed to perform all related frequency conversion, signal filtering and amplification between the a-band, located at a disjointed and much higher frequency range than the b/g-band, and its corresponding b/g-band frequency for an ultimate, cascaded second signal processing into the Baseband I and Q signals using essentially the same hardware from the first signal processing subset.

摘要翻译： 公开了一种具有级联频率转换方案（DBXVR）的可配置双频RF收发器，用于处理由用于无线LAN的开放标准IEEE 802.11a / b / g指定的任何选定的RF信道信号。 DBXVR包括两个可切换连接的天线，用于接收和发送任何所选的RF信道信号和两个信号处理硬件子集。 第一信号处理子集被设计为执行b / g频带与其对应的基带同相（I）和正交（Q）信号之间的所有相关频率转换，信号滤波和放大。 第二信号处理子集被设计为执行位于与b / g频带不相交和高得多的频率范围的a频带之间的所有相关频率转换，信号滤波和放大及其对应的b / g频带频率 用于使用与第一信号处理子集基本上相同的硬件对基带I和Q信号进行最终级联的第二信号处理。

公开(公告)号：US20040242177A1

公开(公告)日：2004-12-02

申请号：US10447810

申请日：2003-05-28

申请人： Fodus Communications, Inc.

发明人： Steve S. Yang

IPC分类号： H04B001/06 ,  H04B007/00

CPC分类号： H04W52/52 ,  H03G3/3068

摘要： A Wireless LAN (WLAN) receiver with packet level Automatic Gain Control (AGC) is disclosed for receiving and converting an RF packet signal, conforming to the open standard IEEE 802.11, into recovered digital data. The receiver comprises a switchably coupled antenna, an analog signal processing circuitry for conditioning and selective frequency down-converting the RF signal into amplified, under a controllable analog gain G1A, video signals VSI and VSQ, an Analog to Digital Converter (ADC) for converting VSI and VSQ into digital outputs IADC and QADC and an AGC subsystem for effecting an adjustment of G1A and for digitally scaling, under a controllable digital gain G2D, the digital outputs LADC and QADC before final digital data recovery. The AGC subsystem further comprises a Calibration and Gain Setting firmware for measuring the preambles of each RF packet and responsively adjusting both G1A and G2D.

摘要翻译： 公开了一种具有分组级自动增益控制（AGC）的无线LAN（WLAN）接收机，用于将符合开放标准IEEE 802.11的RF分组信号接收和转换为恢复的数字数据。 接收机包括可切换耦合的天线，模拟信号处理电路，用于在可控模拟增益G1A，视频信号VSI和VSQ，用于转换的模数转换器（ADC）中调理和选择性地将RF信号降频转换成放大 VSI和VSQ转换为数字输出IADC和QADC以及AGC子系统，用于在可控数字增益G2D，数字输出LADC和QADC最终数字数据恢复之前进行G1A的调整和数字缩放。 AGC子系统还包括用于测量每个RF分组的前导码并且响应地调整G1A和G2D的校准和增益设置固件。