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A FPGA correlation receiver for CDMA encoded LiDAR signals
Publikationstyp
Conference Paper
Date Issued
2017-07-10
Sprache
English
TORE-URI
Start Page
289
End Page
292
Article Number
7974164
Citation
Conference on PhD Research in Microelectronics and Electronics, PRIME: 7974164 (2017-07-10)
Contribution to Conference
Publisher DOI
We present a digital implementation of a correlation receiver for pulsed CDMA lidar signals in direct-time-of-flight systems. A coded time-of-flight lidar is capable to identify its own signals and to reject state-of-the-art uncoded or differently coded pulses. The required sampling rate of the system ADC is determined. For processing the digitized receive signal a correlation filter realized in FPGA hardware is presented. A single filter running at the maximum viable FPGA clock rate of 200 MHz does not ensure reliable signal detection. The filter was parallelized five times to allow processing of 1000 MSa/s signals. Simulations with experimental coded lidar data prove the system's code separation properties.
Subjects
correlation receiver
FPGA
Laser radar
LiDAR
time-of-flight