Analog Base-band Processor for Wireless Gigabit LAN

The base-band analog processor performs necessary signal processing on the 150 MHz base-band signal in the transmit and receive signal paths for a wide-band wireless local area network. The individual channel characteristics depend on the RF signal fade and interference. Broadcasting to multiple appliances requires channel equalization at the receiver. In the receive (Rx) section, the wide-band amplifier amplifies the received signal from the RF transceiver network and is followed by a equalization filter. The amplitude of the signal following the channel equalization filter can very greatly, depending on the channel conditions, so a programmable gain amplifier is needed to better match the signal amplitude to the dynamic range of the subsequent analog-to-digital converter. The demodulation of the carrier is then carried out in the digital domain by a DSP.