Design and FPGA implementation of channel estimation based on carrier aggregation for next-generation WLANs

摘要

In this paper, the design, implementation of channel estimation (CE) techniques are presented, based on the spectrum sensing scenarios of the very high throughput (VHT) wireless local area network (WLAN). Carrier aggregation (CA) can support the extension of wider bandwidth and lead to higher peak data rate. In addition CE is one of the crucial techniques in modern OFDM-MIMO systems due to the uncertainty of wireless channels. However, the separated carriers will affect and change traditional CE methods. In practice, there are few algorithms and designs about CE based on CA. Based on a VHT WLAN testbed with a throughput of 1.1Gbps, this paper will introduce a novel design and implementation of one algorithm used for CA. This implementation reduces FPGA resources significantly and keeps the original data rate.