wlanVHTSTF
Generate VHT-STF waveform
Syntax
Description
Examples
Generate VHT-STF Waveform
Create a VHT configuration object with an 80 MHz channel bandwidth. Generate and plot the VHT-STF waveform.
cfgVHT = wlanVHTConfig; cfgVHT.ChannelBandwidth = 'CBW80'; vstfOut = wlanVHTSTF(cfgVHT); size(vstfOut); plot(abs(vstfOut)) xlabel('Samples') ylabel('Amplitude')
The 80 MHz waveform is a single OFDM symbol with 320 complex time-domain output samples. The waveform contains the repeating short training field pattern.
Input Arguments
Output Arguments
More About
VHT-STF
The very high throughput short training field (VHT-STF) is a single OFDM symbol (4 μs in length) that is used to improve automatic gain control estimation in a MIMO transmission. It is located between the VHT-SIG-A and VHT-LTF portions of the VHT packet.
The frequency domain sequence used to construct the VHT-STF for a 20 MHz transmission is identical to the L-STF sequence. Duplicate L-STF sequences are frequency shifted and phase rotated to support VHT transmissions for the 40 MHz, 80 MHz, and 160 MHz channel bandwidths. As such, the L-STF and HT-STF are subsets of the VHT-STF.
For a detailed description of the VHT-STF, see section 21.3.8.3.4 of IEEE® Std 802.11™-2016.
Algorithms
References
[1] IEEE Std 802.11ac™-2013 IEEE Standard for Information technology — Telecommunications and information exchange between systems — Local and metropolitan area networks — Specific requirements — Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications — Amendment 4: Enhancements for Very High Throughput for Operation in Bands below 6 GHz.
Extended Capabilities
See Also
[1] IEEE Std 802.11ac-2013 Adapted and reprinted with permission from IEEE. Copyright IEEE 2013. All rights reserved.