Software Defined Radio IP The Challenge To develop a true Software-defined radio front-end (SDRFE) IP that can be widely programmed to operate with present and future standards covering WiMAX, WLAN, WPAN, broadcast, and positioning standards. Result A fully integrated transceiver with a wide frequency range and a programmable radio bandwidth. Several identical wideband LNA-Mixer input stages allow connecting different sets of specific external components for the chosen application. The baseband filter has a programmable corner frequency so that the radio-bandwidth can be programmed through the SPI interface. The zero-IF architecture minimizes the external filter components. The transmitter has a similar architecture with a wide band output pre-power amplifier which can deliver up to 0 dBm output power. The FRAC-N synthesizer combined with smart VCO technology provides a wide frequency range up to 4 GHz and a frequency step as low as 20 Hz. All building blocks are programmable through a standard digital interface. In this way a flexible transceiver has been developed which can be programmed in the field towards different wireless standards. Built in 130nm CMOS technology, it offers a small footprint, low power consumption and high reliability.		Applications WiMAX (802.16) WLAN (802.11a/b/g/n) WPAN (802.15.1) Broadcasting (DVB-H, DAB, DMB) Positioning applications  (GPS, GALILEO, GLONASS)...
Key baseline features Frequency range from 700 MHz to 4 GHz Channel bandwidth up to 20 MHz TDD & FDD Zero-IF architecture (RX & TX) RX noise figure of 4.5 dB at 700 MHz and 6 dB at 2.4 GHz Low Pass Filter in TX and RX programmable to 2nd, 4th or 6th order and with a corner frequency, programmable between 100 kHz and 10 MHz RX VGA with gain range from 0 to 88 dB with 2 dB increment TX achieves EVM better the -42 dB at 0.7 GHz and -35 dB at 2.5 GHz for -12 dBm output power (WiMAX OFDM 64 QAM) Frac-N synthesizer including an integrated VCO with tuning range from 3-6 GHz On silicon wide-band LNA Embedded PPA delivering up to -10 dBm linear average output power (WiMAX OFDM 64 QAM) Digital interface for configuration of all circuits Analog I&Q TX inputs & RX outputs RX /TX feedback loops 0.13 µm CMOS TX attenuation of 48 dB with 6 dB increments Silicon proven