This version is outdated by a newer approved version.
This version (10 Mar 2017 22:38) was approved by Robin Getz.The Previously approved version (09 Mar 2017 23:41) is available.
This version (10 Mar 2017 22:38) was approved by Robin Getz.The Previously approved version (09 Mar 2017 23:41) is available.This is an old revision of the document!
Table of Contents
ADALM-PLUTO Receive
Receive Architecture
The AD9363 receive chain is based on Direct Conversion technique.
Some things to think about:
- ACG is good. Please use it.
- ACG needs to be set up properly so that it is good, defaults are just that - a best guess for generic waveforms.
- Half bands and FIR is there, you should use those.
- The best performance is normally running the ADC as fast as possible, and decimating as much as possible.
Receive Performance
Details on the performance can be found in the performance section.
While there are many aspects of receive performance, the two most common are:
- Receiver sensitivity (how far away can I be, and still receive something). Separate Topic.
- Input fidelity (how accurate is the reception)
For the ADALM-PLUTO, the both the receiver sensitivity and input accuracy are both frequency dependent. For plots vs frequency, check out the detailed performance section.
This is a the output of the Keysight 89600 VSA software, which is used to measure signal demodulation and complete vector signal analysis. In this case, we generate an LTE 10 (10MHz wide channel), and transmit it out the Tx port of the E4438C ESG Vector Signal Generator and capture it on the ADALM-PLUTO's Rx port, and the save the data, and load it into the VSA software for analysis. We can measure the RF offset (frequency error = 67Hz), and how accurate the 64-QAM constellation is created (an EVM of -43 dB, or less than 0.6% RMS error) - which is pretty good (better than the AD9363 datasheet).
By changing the LO frequency, output power, output attenuation, these results will change.
university/tools/pluto/users/receive.1489181892.txt.gz · Last modified: 10 Mar 2017 22:38 by Robin Getz