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The IEEE802.11ac task group has started to establish a next-generation WLAN standard. The wider channel of more than 80 MHz achieving over a 1-Gbps data rate is discussed. We have developed an experimental platform consisting of baseband and RF units in a 2×2 MIMO-OFDM system for the wider channel and evaluated its system performance in a field experiment. A MIMO-OFDM transceiver in the baseband unit...
State-of-the-art commercial wideband ADCs (analog to digital converter) already have the qualification for direct RF (radio frequency) sampling, especially for bandpass sampling for L band GNSS (global navigation satellite system) receivers. Compared with IF (intermediate frequency) sampling, this approach has outstanding features of simple structure, high flexibility, as well as low distortion. This...
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