This version (25 May 2019 15:49) was approved by Robin Getz.The Previously approved version (22 Jun 2018 21:09) is available.
ADALM-PLUTO Receiver Sensitivity
Receiver sensitivity is a measure of the ability of a receiver to demodulate and get information from a signal. Most people quantify sensitivity as the lowest signal power level from which we can get useful information.
Since the above definition uses “demodulate”, you should immediately understand, this is a meaningless specification for a pure radio. There is no demodulation in the base design, and we pass samples around. The actual receiver sensitivity will depend on channel bandwidth, temperature, modulation scheme, how robust the demodulator is, something that we just don't control (that's all up to you).
What is specified, and measured, is noise:
- Tx noise: ≤−157 dBm/Hz noise floor
- Rx noise figure : 2.5 dB @ Maximum Rx gain
- Integrated Phase Noise : 0.3 ° rms, 100 Hz to 100 MHz
These noise numbers can be used to calculate the min received power to decode something.
Rx Noise Figure
The IEEE Standard definition of noise figure, states that:
The noise factor, at a specified input frequency, is defined as the ratio of:
- NF = Noise Figure
= noise added by the device under test
- k = Boltzmann’s Constant (1.38 x 10-23 joules/K),
= temperature in Kelvin (in this case 290 K)
- B = bandwidth of the device
- G = gain of the device
This is measured using test equiment, as specified in Agilent Fundamentals of RF and Microwave Noise Figure Measurements.
university/tools/pluto/users/receiver_sensitivity.txt · Last modified: 25 May 2019 15:49 by Robin Getz