This research concentrates on the design and analysis of low power ultra wideband receivers for Multiband Orthogonal Frequency Division Multiplexing systems. Low power design entails different performance tradeoffs, which are analyzed. Relationship among power consumption, achievable noise figure and linearity performance including distortion products (cross-modulation, inter-modulation and harmonic distortion) are derived. From these relationships, circuit design proceeds with allocation of gain among different sub circuit blocks for power optimum system.
A power optimum RF receiver front-end for MB-OFDM based UWB systems is designed that covers all the MB-OFDM spectrum between 3.1 GHZ to 9.6 GHZ. The receiver consists of a low-noise amplifier, down-converter, channel select filter and programmable gain amplifier and occupies only 1mm 2 in 0.13um CMOS process. Receiver consumes 20 mA from a 1.2 V supply and has the measured gain of 69db, noise figure less than 6 dB and input IIP 3 of -6 dBm
