公开(公告)号：US20040132488A1

公开(公告)日：2004-07-08

申请号：US10730148

申请日：2003-12-08

Applicant: Samsung Electronics Co., Ltd.

Inventor： Takahashi Hidehiro ,  Sang-Woo Kim ,  Se-Hee Han ,  Jai-Shin Chung

IPC: H04Q007/20

CPC classification number: H04B1/0067 ,  H04B1/005 ,  H04B1/406 ,  H04B1/707 ,  H04B2201/7071

Abstract: There is provided a multi-mode communication system which is operable according to different operating modes, such as GSM and WCDMA. The multi-mode communication system includes first and second switching units, a delta-sigma modulator, an analog-to-digital converter, sequential convolution units and a selection unit. The delta-sigma modulator samples an analog signal, which is inputted through the first switching unit in one mode, into 1-bit digital signal. In another mode, the analog-to-digital converter samples an analog signal, which is inputted through the first switching unit into an n-bit digital signal. The sequential convolution units multiply filter factors with the output of the delta-sigma modulator, which is inputted through the second switching unit at the first mode, and multiply PN codes by the output of the analog-to-digital converter, which is inputted through the second switching unit at the second mode, to generate WCDMA output waveforms. The selection unit delays the outputs of the sequential convolution units by a predetermined time at the GSM mode to restore GSM output waveforms. Accordingly, the multi-mode communication system is operable according to multimodes, such as GSM mode and WCDMA mode.

Abstract translation: 提供了可以根据不同的操作模式操作的多模式通信系统，例如GSM和WCDMA。 多模式通信系统包括第一和第二开关单元，Δ-Σ调制器，模数转换器，顺序卷积单元和选择单元。 Δ-Σ调制器将在一种模式中通过第一开关单元输入的模拟信号采样成1位数字信号。 在另一种模式中，模数转换器将通过第一开关单元输入的模拟信号取样成n位数字信号。 顺序卷积单元将滤波器因子与在第一模式下通过第二开关单元输入的Δ-Σ调制器的输出相乘，并将PN码乘以模数转换器的输出，该输出通过 第二切换单元处于第二模式，以产生WCDMA输出波形。 选择单元在GSM模式下将顺序卷积单元的输出延迟预定时间以恢复GSM输出波形。 因此，多模式通信系统可以根据诸如GSM模式和WCDMA模式的多模式来操作。