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Low-density parity-check (LDPC) codes are a class of highly efficient linear block codes made from many single parity check (SPC) codes. They can provide performance very close to the channel capacity (the theoretical maximum) using an iterated soft-decision decoding approach, at linear time complexity in terms of their block length.
GNU Radio is a Free/Libre toolkit that can be used to develop software-defined radios. This framework uses a combination of C++ and Python to optimize DSP performance while providing an easy-to-use application programming environment.GNU Radio Companion is a graphical programming environment provided with GNU Radio. [4]
PCIe SDR MIMO 2x2 [84] Pre-built 70 MHz – 6 GHz ? 61.44 Msps 2/2 PCIe (1x) No Yes No PM-SDR [85] Pre-built 100 kHz – 50 MHz (up to 165 MHz using harmonics) 192 kHz ext No External ADC required (I/Q output) ? USB Yes Yes ? PrecisionWave Embedded SDR [86] Pre-built / Customizable Frontends 1 MHz – 9.7 GHz (depending on frontend) 2x RX: 155 MHz
A waterfall plot for FT8 signals (bandwidth 50 Hz) in the 40-meter band and for JT65 on the right (bandwidth 180 Hz) Joe Taylor, K1JT, announced on June 29, 2017, the availability of a new mode in the WSJT-X software, FT8. [11] FT8 stands for "Franke-Taylor design, 8-FSK modulation" and was created by Joe Taylor, K1JT and Steve Franke, K9AN.
Waterfall plots are often used to show how two-dimensional phenomena change over time. [1] A three-dimensional spectral waterfall plot is a plot in which multiple curves of data, typically spectra, are displayed simultaneously. Typically the curves are staggered both across the screen and vertically, with "nearer" curves masking the ones behind.
At least five people, including a 9-year-old, are now known to have been killed in the vehicle-ramming attack on a Christmas market in the German city of Magdeburg on Friday, German officials said ...
People who took Zepbound, Eli Lilly’s weight loss drug, shed more pounds than those on Novo Nordisk’s Wegovy in a head-to-head clinical trial, Lilly said in a news release Wednesday.
For example, 72% of survey respondents with grandchildren say they hardly ever feel isolated compared with 62% of those without grandchildren. Why younger families aren’t having kids.