Digital Compensation Method For Reducing The ADC Resolution In Wireless Communication Receiver

The recent 60Ghz mm-wave technology opens a new era for multi-Gigabit wireless communication systems for its Giga bit per second transmission speed. This enables the transmission of Gigabit-per-second applications like the transmission of uncompressed high definition video and Giga-bit Ethernet. However, 60Ghz mm-wave technology faces a series of problems and one critical challenge is to design high-speed, high-precision Analog-to-Digital Converter (ADC) which is either hard to design or power hungry.The signal received by the ADC at the receiver side is always has a large dynamic range than the original because of the various interference of the wireless path and this is the main reason to make the resolution of the ADC be high. In all kinds of interference, multipath effect contributes much to the received signal. In this dissertation, we proposed a mixed-signal equalizer for high data rate wireless receivers to deal with the frequency selective fading effect based on the study of the frequency selective fading channel and the receiver structure. Though this structure, the resolution requirement of the ADC is reduce by nearly two-bits while maintain the same performance. The only expense is to introduce another high-speed, high-resolution DAC. Optimizations are conducted to the proposed structure to reduce the resolution of the DAC to further reduce the design complexity and power consumption.