This document introduces the AN-851 WiMax IF architecture design, including WiMax technology, frequency range, modulation method, signal-to-noise ratio, etc.
This document details a design for a medium frequency (IF) sampling receiver targeting the 2.3 GHz to 2.36 GHz Wireless Communications Service (WCS) band and the 2.4 GHz to 2.48 GHz ISM band. The architecture is based on a 14-bit ADC and utilizes a dual down-conversion approach to handle large signal bandwidths typical of WiMax or multicarrier systems. The design aims to meet IEEE 802.16 standards for sensitivity and adjacent channel rejection.
The design uses surface acoustic wave (SAW) filters to process up to 10 MHz of channel bandwidth.
The receiver equipment must be able to withstand a 0 dBm input level without being damaged.