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  2. Pseudorandom noise - Wikipedia

    en.wikipedia.org/wiki/Pseudorandom_noise

    A pseudo-noise code (PN code) or pseudo-random-noise code (PRN code) is one that has a spectrum similar to a random sequence of bits but is deterministically generated. The most commonly used sequences in direct-sequence spread spectrum systems are maximal length sequences , Gold codes , Kasami codes , and Barker codes .

  3. Convolutional code - Wikipedia

    en.wikipedia.org/wiki/Convolutional_code

    Generator polynomials are G 1 = (1,1,1), G 2 = (0,1,1), and G 3 = (1,0,1). Therefore, output bits are calculated (modulo 2) as follows: n 1 = m 1 + m 0 + m −1 n 2 = m 0 + m −1 n 3 = m 1 + m −1. Convolutional codes can be systematic and non-systematic: systematic repeats the structure of the message before encoding; non-systematic changes ...

  4. High Capacity Color Barcode - Wikipedia

    en.wikipedia.org/wiki/High_Capacity_Color_Barcode

    High Capacity Color Barcode (HCCB) is a technology developed by Microsoft for encoding data in a 2D "barcode" using clusters of colored triangles instead of the square pixels conventionally associated with 2D barcodes or QR codes.

  5. Binary Golay code - Wikipedia

    en.wikipedia.org/wiki/Binary_Golay_code

    An octad and a dodecad intersect at 2, 4, or 6 coordinates. Up to relabeling coordinates, W is unique. The binary Golay code, G23 is a perfect code. That is, the spheres of radius three around code words form a partition of the vector space. G23 is a 12-dimensional subspace of the space F23.

  6. Help, I Can’t Stop Twirling in This Absolutely Adorable ...

    www.aol.com/entertainment/help-t-stop-twirling...

    Get the Floerns Tie Strap Maxi Dress for just $47 at Amazon! Please note, prices are accurate at the date of publication, May 1, 2024, but are subject to change. It’s just about summer. And if ...

  7. Radar beacon - Wikipedia

    en.wikipedia.org/wiki/Radar_beacon

    Radar beacon. Racon signal as seen on a radar screen. This beacon receives using sidelobe suppression and transmits the letter "Q" in Morse code near Boston Harbor (Nahant) 17 January 1985. Radar beacon (short: racon) is – according to article 1.103 of the International Telecommunication Union's (ITU) ITU Radio Regulations (RR) [1 ...