公开(公告)号：US07095819B2

公开(公告)日：2006-08-22

申请号：US10135997

申请日：2002-04-30

申请人： Abdellatif Bellaouar ,  Charles Gore ,  Jeff D. Laster

发明人： Abdellatif Bellaouar ,  Charles Gore ,  Jeff D. Laster

IPC分类号： H03D3/24 ,  H04L25/49

CPC分类号： H03C3/0933 ,  H03C3/0925 ,  H03L7/18 ,  H03L7/1976 ,  H04L5/06

摘要： Multiple-mode direct phase/amplitude modulation circuitry (20) for use in a transceiver (17) of a device such as a wireless handset (10) is disclosed. The modulation circuitry (20) includes a modulation loop (36) for modulating a phase signal into a Gaussian-Minimum-Shift-Keyed (GMSK) signal for transmission in a first mode. The modulation loop (36) may include a phase-locked loop (45) with its frequency controlled by a Σ-Δ demodulation of a compensated version of the phase signal, or alternatively may produce a modulated signal from a direct digital synthesis circuit (70; 70′). An amplitude signal is converted into an analog signal and applied to a single-sideband mixer (43) for combination with a frequency multiplied version of the phase-modulated signal (GMSK(t); PH(t)), producing an amplitude and phase modulated signal for transmission in a second mode.

摘要翻译： 公开了用于例如无线手机（10）的设备的收发器（17）中的多模直接相位/幅度调制电路（20）。 调制电路（20）包括调制环路（36），用于将相位信号调制为高斯最小偏移键控（GMSK）信号，以在第一模式下传输。 调制环路（36）可以包括其频率由相位信号的补偿版本的Σ-Δ解调控制的锁相环（45），或者可以产生来自直接数字合成电路（70）的调制信号 ; 70'）。 振幅信号被转换为模拟信号，并加到单边带混频器（43）上，与相位调制信号（GMSK（t）; PH（t））的倍频版相结合，产生振幅和相位 调制信号用于在第二模式中传输。

公开(公告)号：US07359684B2

公开(公告)日：2008-04-15

申请号：US10012869

申请日：2001-11-06

申请人： Abdellatif Bellaouar ,  Jeff D. Laster ,  Charles Gore

发明人： Abdellatif Bellaouar ,  Jeff D. Laster ,  Charles Gore

IPC分类号： H04B1/04 ,  H04B1/40 ,  H04B1/02 ,  H04M1/00

CPC分类号： H04B1/26 ,  H04B1/0475 ,  H04B2001/0491

摘要： A wireless communication device (UST), comprising an input for receiving baseband data (I, Q) in a first signal having a first frequency. The device also comprises circuitry (681, 682) for increasing the first frequency, to form a second signal having a second frequency, in response to a first frequency reference signal (IF2), and the device comprises circuitry (74) for increasing the second frequency, to form a third signal having a third frequency, in response to a second frequency reference signal (LO2). Lastly, the device comprises an antenna (ATU2) for transmitting the baseband data at a final transmission frequency selected as a band within a predetermined set of frequency bands. With reference to the preceding, the first frequency reference signal and the second frequency reference signal are variable and are selected in response to the final transmission frequency which is a particular band selected as a different band at different times and from the predetermined set of frequency bands.

摘要翻译： 一种无线通信设备（UST），包括用于在具有第一频率的第一信号中接收基带数据（I，Q）的输入。 该装置还包括用于增加第一频率的电路（68 1，68 2 2），以响应于第一频率参考信号形成具有第二频率的第二信号 （IF 2 2），并且该装置包括用于响应于第二频率参考信号（LO 2）而增加第二频率以形成具有第三频率的第三信号的电路（74） ）。 最后，该设备包括用于以选定为预定频带组内的频带的最终传输频率发送基带数据的天线（ATU 2）。 参考前述，第一频率参考信号和第二频率参考信号是可变的，并且是响应于作为在不同时间被选择为不同频带的特定频带的最终发射频率和从预定频带组中​​选择的 。