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本文提出了一种无SAW滤波器的多频段WEDGE（WCDMA/EDGE）接收机架构，旨在解决多频段3G收发器中因大量外部SAW滤波器导致的前端复杂性问题。通过处理有限发射机泄漏抑制带来的额外噪声，实现了无需级间SAW滤波器的多频段接收。
Fabio T. Braz1, Richard Gudmundsson2, Thomas Mattsson2, Carine Lascaux1, Christophe Trichereau1, Wen Suter3, Eric Westesson2, Andreas Nydahl2 ST-NXP Wireless, Caen, France, 2Ericsson Mobile Platforms, Lund, Sweden Ericsson Mobile Platforms, Raleigh, NC 1 3 With an ever-increasing number of frequency bands supported by cellular transceivers (TRX), front-end (FE) complexity increases due to a large number of external SAW filters. The challenge of removing inter-stage filters from multiband 3G receivers (RX) resides in the additional noise contribution due to limited transmitter (TX) leakage rejection at the RX input, intermodulation (IM) products and cross-compression due to TX leakage and strong out-ofband blockers. Increased downconverter dynamic range is thus required for a SAW-less RX path. In addition, avoiding SNR degradation from reciprocal mixing imposes additional constraints on LO phase noise.
Olivier Gaborieau1, Sven Mattisson2, Nikolaus Klemmer3, Bassem Fahs1,