Lines Matching +full:signal +full:- +full:to +full:- +full:noise

17 .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
60 layer used by 802.11 drivers includes support for a device-independent
68 Radiotap was designed to balance the desire for a hardware-independent,
69 extensible capture format against the need to
71 These considerations led to a format consisting of
84 and macros to set the bits of the
86 bitmap to indicate which fields exist and are filled in by the driver.
93 With radiotap setup, drivers just need to fill in per-packet
95 in the transmit path (since control is not returned to the
97 layer before the packet is handed to the device).
105 .Bd -literal -offset indent
115 .Bd -literal -offset indent
129 .Bl -tag -width indent
131 This field contains the unsigned 64-bit value, in microseconds,
138 This field contains a single unsigned 8-bit value, containing one or
140 .Bl -tag -width indent
153 data payload to align the payload to a 32-bit boundary.
160 This field contains a single unsigned 8-bit value that is the data rate.
165 This field contains two unsigned 16-bit values.
172 but may be used to save space in the capture file for legacy devices.
174 .\"This field contains two 8-bit values.
175 .\"This field should be present only for frequency-hopping radios.
179 This field contains a single signed 8-bit value that indicates the
180 RF signal power at the antenna, in decibels difference from 1mW.
182 This field contains a single signed 8-bit value that indicates the
183 RF noise power at the antenna, in decibels difference from 1mW.
185 .\"This field contains a single unsigned 16-bit value, indicating the
188 .\"There does not appear to be a standard way of measuring this at this time;
189 .\"this quantity is often referred to as
190 .\".Dq "Signal Quality"
193 .\"This field contains a single unsigned 16-bit value, expressing transmit
198 .\"This field contains a single unsigned 16-bit value, expressing transmit
204 This field is a single signed 8-bit value.
207 This field contains a single unsigned 8-bit value that specifies
208 which antenna was used to transmit or receive the frame.
209 Antenna numbering is device-specific but typically the primary antenna has
212 antenna selection is left to the device.
214 This field contains a single unsigned 8-bit value that indicates the
215 RF signal power at the antenna, in decibels difference from an
218 This field contains a single unsigned 8-bit value that indicates the
219 RF noise power at the antenna, in decibels difference from an
222 This field contains four values: a 32-bit unsigned bitmap of
223 flags that describe the channel attributes, a 16-bit unsigned
224 frequency in MHz (typically the channel center), an 8-bit
225 unsigned IEEE channel number, and a signed 8-bit value that
234 and is the only way to completely express all
240 .Bd -literal -offset indent
262 .Bd -literal -offset indent
294 .An -nosplit