A multiband LTE SAW-less modulator with −160dBc/Hz RX-band noise in 40nm LP CMOS
作者： Vito Giannini , Mark Ingels , Tomohiro Sano , Bjorn Debaillie , Jonathan Borremans
DOI: 10.1109/ISSCC.2011.5746360
关键词: Transmitter 、 Noise 、 Duplexer 、 Orthogonal frequency-division multiplexing 、 Amplifier 、 WiMAX 、 Spread spectrum 、 Engineering 、 Electronic engineering 、 Code division multiple access 、 Electrical engineering
摘要: In FDD cellular standards, the transmitter's out of-band noise leaks into receive band due to finite duplexer TX RX isolation. If this is not low enough, a SAW filter needed before Power Amplifier preserve sensitivity. Out-of-band also an important concern for coexistence of transmitters with standards like GPS, WLAN and/or WiMAX on same smart phone, very common scenario nowadays. The SAW-less RX-band challenge becomes even more acute in Long-Term Evolution (LTE) standard [1] where will need operate multiple bands, using wider channel bandwidths and higher Peak-to-Average Ratios (PAPR).
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