公开(公告)号：EP1473844A1

公开(公告)日：2004-11-03

申请号：EP03009546.7

申请日：2003-04-28

申请人： Sony Ericsson Mobile Communications AB

发明人： Repin, Alexander, Sony Ericsson Mobile Com. AB ,  Kozlov, Vladimir, Sony Ericsson Mobile Com. AB

IPC分类号： H04B1/40 ,  H04B1/28

CPC分类号： H04B1/0007 ,  H04B1/0096 ,  H04B1/28 ,  H04B1/406

摘要： The invention relates to the field of multi-standard receiver that can be applied to wireless multi-mode transceivers in a cellular communication system. It particularly refers to an analog front end of a digital dual-mode intermediate frequency (IF) sampling receiver architecture with two reception chains (401, 403, 404, 405 and 401, 403, 406, 407) and a signal processing chain (410, 411, 412, 413) for selectively receiving, processing and down-converting modulated RF signal spectra of a first (GSM/ GPRS (DCS) 1,800 MHz Rx, GSM/GPRS (PCS) 1,900 MHz Rx, and UMTS TDD Rx) or a second frequency band (GSM/GPRS 850 MHz Rx, GSM/GPRS 900 MHz Rx) from the passband to a common IF band, which can advantageously be applied to a wireless communication device in a cellular telecommunication system based on UMTS or GSM/GPRS technology.
The IF sampling receiver architecture thereby comprises means (408, 408a) for up-converting the modulated RF signal spectrum of a second frequency band (GSM/GPRS 850 MHz Rx, GSM/GPRS 900 MHz Rx) to a first frequency band (GSM/GPRS (DCS) 1,800 MHz Rx, GSM/GPRS (PCS) 1,900 MHz Rx, and UMTS TDD Rx) and switching means (409) for selectively switching either the modulated RF signal spectrum of said first or said second frequency band (GSM/GPRS 850 MHz Rx, GSM/GPRS 900 MHz Rx) to a common signal processing chain for further processing. According to a further aspect of the invention, a sigma-delta analog-to-digital converter 414 (SDADC) is connected to the output port of the signal processing chain (410, 411, 412, 413), which provides a time- and amplitude-quantized time-domain representation of the down-converted RF signal spectrum of either said first or second frequency band, which allows to obtain high linearity and signal-to-noise ratio (SNR) by means of oversampling and spectral shaping of the quantization noise.

摘要翻译： 本发明涉及可应用于蜂窝通信系统中的无线多模收发机的多标准接收机领域。 特别是指具有两个接收链（401,403,404,405和401,403,406,407）和信号处理链（410）的数字双模中频（IF）采样接收机架构的模拟前端 ，411,412,413），用于选择性地接收，处理和降频转换第一（GSM / GPRS（DCS）1,800MHz Rx，GSM / GPRS（PCS）1900MHz Rx和UMTS TDD Rx）的调制RF信号频谱） 从通带到公共IF频带的第二频带（GSM / GPRS 850MHz Rx，GSM / GPRS 900MHz Rx），其可以有利地应用于基于UMTS或GSM / GPRS的蜂窝电信系统中的无线通信设备 技术。 IF采样接收机架构由此包括用于将第二频带（GSM / GPRS 850MHz Rx，GSM / GPRS 900MHz Rx）的调制RF信号频谱上变频到第一频率的装置（408,408a） （GSM / GPRS（DCS）1,800MHz Rx，GSM / GPRS（PCS）1900MHz Rx和UMTS TDD Rx）和用于选择性地切换所述第一或所述第二频带的调制RF信号频谱的切换装置 （GSM / GPRS 850 MHz Rx，GSM / GPRS 900 MHz Rx）到通用信号处理链进行进一步处理。 根据本发明的另一方面，Σ-Δ模数转换器414（SDADC）连接到信号处理链（410,411,412,413）的输出端口，其提供时间和 所述第一或第二频带的下变频RF信号频谱的幅度量化时域表示，其允许通过量化的过采样和频谱整形来获得高线性度和信噪比（SNR） 噪声。