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IEEE_802.11n_Oct_2009_Final_Version.p
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上传时间: 2013-06-27
详细说明： The IEEE 802.11 HT STA provides physical layer (PHY) and medium access control (MAC) features that can support a throughput of 100 Mb/s and greater, as measured at the MAC data service access point (SAP). An HT STA supports HT features as identified in Clause 9 and Clause 20. An HT STA operating in the 5 GHz band supports transmission and reception of frames that are compliant with mandatory PHY specifications as defined in Clause 17. An HT STA operating in the 2.4 GHz band supports transmission and reception of frames that are compliant with mandatory PHY specifications as defined in Clause 18 and Clause 19. An HT STA is also a quality of service (QoS) STA. The HT features are available to HT STAs associated with an HT access point (AP) in a basic service set (BSS). A subset of the HT features is available for use between two HT STAs that are members of the same independent basic service set (IBSS). An HT STA has PHY features consisting of the modulation and coding scheme (MCS) set described in 20.3.5 and physical layer convergence procedure (PLCP) protocol data unit (PPDU) formats described in 20.1.4. Some PHY features that distinguish an HT STA from a non-HT STA are referred to as multiple input, multiple output (MIMO) operation; spatial multiplexing (SM); spatial mapping (including transmit beamforming); space-time block coding (STBC); low-density parity check (LDPC) encoding; and antenna selection (ASEL). The allowed PPDU formats are non-HT format, HT-mixed format, and HT-greenfield format. The PPDUs may be transmitted with 20 MHz or 40 MHz bandwidth. An HT STA has MAC features that include frame aggregation, some Block Ack features, power save multipoll (PSMP) operation, reverse direction (RD), and protection mechanisms ...展开收缩
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