using fldigi, other packet radio/data modes: Many ways of sending data.
Drawbacks: Fading and signal loss means data corruption or loss. Can be sent using simple 8-bit mircocontrollers (e.g., HAMShield can do it). What are current methods for sending images from balloons/remote control vehicles/rockets/etc.? We therefore transmit random selections of pixels in each packet so that each packet contains information from the entire image, and combining multiple packets improves received image fidelity (e.g., resolution).
#Fldigi packet full#
Using compressed sensing imaging, one can reconstruct full images from random selections of pixels from that image. The link is unconnected (i.e., one directional broadcasts) and will lead to corrupted/lost packets. Remote station is assumed to have little computing power, so minimal processing will occur on the remote state. PCSI Reference ApplicationĪ remote amateur radio station on a high altitude balloon or satellite transmitting images back to ground stations. Even if a receiver joins the broadcast mid-transmission, it will be able to reconstruct the full image. High quality, full frame images, can be reconstructed with as little as 10% of the original data being transmitted or received. PCSI is a way of transmitting imaging data over unconnected networks where receiving stations may each receive different random packets (due to corruption from noise or blocked signals) yet each receiving station can individually reconstruct the entire original image with high fidelity only with the packets it received. You can find the PDP specification used in PCSI here. This contains some details and theoretical background on PCSI.įor general info on PCSI and the computer program used to transmit PCSI images, return to the main page.
0 kommentar(er)
