wlanSampleRate

Nominal sample rate

Syntax

fs = wlanSampleRate(cfgFormat)

fs = wlanSampleRate(cbw)

fs = wlanSampleRate(___,OversamplingFactor=osf)

Description

fs = wlanSampleRate(cfgFormat) returns the nominal sample rate for the specified WLAN transmission parameters.

fs = wlanSampleRate(cbw) returns the nominal sample rate for the specified channel bandwidth.

fs = wlanSampleRate(___,OversamplingFactor=osf) returns the nominal sample for the specified oversampling factor. For more information about oversampling, see FFT-Based Oversampling.

Examples

Sample Rate for WUR Transmission

Get the sample rate for a WLAN wake-up radio (WUR) transmission.

cfgWUR = wlanWURConfig;
fs = wlanSampleRate(cfgWUR)

fs = 20000000

Sample Rate for 160 MHz WLAN Transmission

Get the sample rate for WLAN transmissions with specified bandwidths.

Specify a channel bandwidth of 160 MHz

cbw = 'CBW160';

Return the sample rate.

fs = wlanSampleRate(cbw)

fs = 160000000

Sample Rate for Oversampled HE TB Transmission

Get the sample rate for an oversampled high-efficiency trigger-based (HE TB) WLAN transmission.

cfgHETB = wlanHETBConfig;
osf = 2.5;
fs = wlanSampleRate(cfgHETB,Oversamplingfactor=osf)

fs = 50000000

Input Arguments

cfgFormat — WLAN transmission parameters

wlanHESUConfig object | wlanHEMUConfig object | wlanHETBConfig object | wlanHERecoveryConfig object | wlanWURConfig object | wlanDMGConfig object | wlanS1GConfig object | wlanVHTConfig object | wlanHTConfig object | wlanNonHTConfig object

WLAN transmission parameters, specified as one of these configuration objects: wlanHESUConfig, wlanHEMUConfig, wlanHETBConfig, wlanHERecoveryConfig, wlanWURConfig, wlanDMGConfig, wlanS1GConfig, wlanVHTConfig, wlanHTConfig, or wlanNonHTConfig.

cbw — Channel bandwidth

'CBW1' | 'CBW2' | 'CBW4' | 'CBW5' | 'CBW8' | 'CBW10' | 'CBW16' | 'CBW20' | 'CBW40' | 'CBW80' | 'CBW160' | 'CBW320'

Channel bandwidth, specified as one of these values.

• 'CBW1' — Channel bandwidth of 1 MHz

• 'CBW2' — Channel bandwidth of 2 MHz

• 'CBW4' — Channel bandwidth of 4 MHz

• 'CBW5' — Channel bandwidth of 5 MHz

• 'CBW8' — Channel bandwidth of 8 MHz

• 'CBW10' — Channel bandwidth of 10 MHz

• 'CBW16' — Channel bandwidth of 16 MHz

• 'CBW20' — Channel bandwidth of 20 MHz

• 'CBW40' — Channel bandwidth of 40 MHz

• 'CBW80' — Channel bandwidth of 80 MHz

• 'CBW160' — Channel bandwidth of 160 MHz

• 'CBW320' — Channel bandwidth of 320 MHz

Data Types: char | string

osf — Oversampling factor

1 (default) | scalar greater than or equal to 1

Oversampling factor, specified as a scalar greater than or equal to 1.

Data Types: single | double | int8 | int16 | int32 | int64 | uint8 | uint16 | uint32 | uint64

Output Arguments

fs — Sample rate

scalar

Sample rate, in samples per second, returned as a scalar.

Algorithms

FFT-Based Oversampling

An oversampled signal is a signal sampled at a frequency that is higher than the Nyquist rate. WLAN signals maximize occupied bandwidth by using small guardbands, which can pose problems for anti-imaging and anti-aliasing filters. Oversampling increases guardband width relative to the total signal bandwidth, thereby increasing the number of samples in the signal.

This function performs oversampling by using a larger IFFT and zero pad when generating an OFDM waveform. This diagram shows the oversampling process for an OFDM waveform with N_FFT subcarriers comprising N_g guardband subcarriers on either side of N_st occupied bandwidth subcarriers.

Extended Capabilities

C/C++ Code Generation
Generate C and C++ code using MATLAB® Coder™.

Version History

Introduced in R2017b