零中频WCDMA发射机手持集成电路的笛卡尔反馈可行性研究

The 3rd International IEEE-NEWCAS Conference, 2005. Pub Date : 2005-06-19 DOI:10.1109/NEWCAS.2005.1496754

C. Tassin, P. Garcia, J.-P. Begueret, Y. Deval, D. Belot

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引用次数: 3

摘要

提出了一种描述WCDMA零中频发射机IC主要要求的笛卡尔反馈可行性研究。该发射机架构由模拟部分(带前向调制器)、反馈解调器和数字部分组成，用于调节环路周围的相位旋转，消除反馈路径中的直流偏移和I/Q增益不匹配。线性化性能在5 MHz偏移时提高了27 dB ACPR，在10 MHz偏移时提高了15 dB ACPR。

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A Cartesian feedback feasibility study for a zero-IF WCDMA transmitter handset IC

A Cartesian feedback feasibility study is presented describing the main requirements of a WCDMA zero-IF transmitter IC. The transmitter architecture consists of an analog part with a forward modulator, a feedback demodulator and a digital part to adjust the phase rotation around the loop and to remove the DC offset and I/Q gain mismatches in the feedback path. Linearization performances are 27 dB ACPR improvement at 5 MHz offset and 15 dB ACPR improvement at 10 MHz.

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The 3rd International IEEE-NEWCAS Conference, 2005.

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