【技術文章】 WLAN IEEE 802.11ac – Wideband Signal Testing Offering bandwidths up to 160 MHz, the signal generators and analyzers from Rohde & Schwarz are ideal for testing IEEE 802.11ac signals Your task The WLAN IEEE 802.11ac standard aims to significantly increase data rates, opening up new use cases such as wireless displays with HD quality. To achieve a higher throughput, IEEE 802.11ac has several new features, including a channel bandwidth of up to 160 MHz and 80 + 80 MHz. Further enhancements are 256QAM modulation and multiple input multiple output (MIMO) with up to eight spatial streams. These features enable data rates of up to 870 Mbit/s on a single spatial stream and 6.9 Gbit/s with eight spatial streams. The new signal features place high demands on the performance of WLAN devices in terms of modulation accuracy and adjacent channel leakage. 256QAM modulation, for instance, requires a maximum error vector magnitude (EVM) of –32 dB. Bandwidths of 80 + 80 MHz and 160 MHz present further challenges when designing IEEE 802.11ac 全文網址 rohde-schwarz/en/applications/wlan-ieee-802.11ac-wideband-signal-testing-application-card_56279-42113.html
Posted on: Mon, 01 Jul 2013 01:43:33 +0000
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