How does 802.11n achieve the multi-hundred megabits throughput and longer coverage range?
IEEE 802.11n brings many new features to deliver the performance gains. It uses the multiple-input-multiple-output (MIMO) technology that enables spatial diversity and spatial multiplexing for respectively increasing the range and data transmission rate. In addition, 802.11n allows use of wider 40 MHz channels to double the bandwidth as compared to the legacy 20 MHz operation. 802.11n uses frame aggregation and block acknowledgements for improving the throughput efficiency.
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