1. Low Complexity, High throughput wireless architecture
Dayu Huang Advisor: Prof. Sean Meyn, Prof. Ada S.Y. Poon
Illinois Center for
Wireless Systems
GOAL
PROPOSED METHODOLOGY
Wireless Architecture
High Throughput
Low Complexity
Energy Efficient
Signaling with energy efficient constellation which is also of low decoding complexity.
Exploring channel fading mechanism.
ISSUES
Optimal Constellation matching to channel statistic leads to simple suboptimal constellation that outperforms in throughput conventional QAM of the same decoding complexity, as indicated by the capacity plot.
Capacity plot implies ideal case; Study with simulation of system with proposed constellation is in progress, using more realistic channel model.
Impacts of Analog Impairment on proposed constellation will be investigated by experiment with a FPGA-based Test Bed.
Constellation on the right has the same decoding complexity as 16QAM, but considerably outperforms 64QAM (left) at high SNR.
WORK IN PROGRESS
FPGA-based Test Bed
Symbols
IFFT,
Add CP
Digital Up
Converter
Digital to
Analog
Transmitter
Front-End
Digital Down
Analog to
Digital
Receiver
Packet Detection
Timing Recovery,
Remove CP,
FFT
Computer
FPGA
Impairment
the system diagram of the test bed