Walsh code
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Walsh code

Also known as "Walsh-Hadamard code," it is an algorithm that generates statistically unique sets of numbers for use in encryption and cellular communications. Known as "pseudo-random noise codes," Walsh codes are used in direct sequence spread spectrum (DSSS) systems such as QUALCOMM's CDMA. They are also used in frequency hopping spread spectrum (FHSS) systems to select the target frequency for the next hop. See CDMA.

          Walsh Code Algorithm

          (a', b') = (a+b, a-b)

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No references found			Unique codes for each mobile are created on the forward channel by combining the voice data with 1 of 64 user Walsh codes and then combining that with a sector unique offset of the PN (pseudo-noise) short code (see the Figure). From Watson to W-CDMA by Peichel, Cory / Communications News			Walnut Point State Park Walnut Woods State Park Walpi Walpole Walpole, Horace Walpole, Horace, 4th earl of Orford Walpole, Robert Walpole, Robert, 1st earl of Orford Walpole, Sir Hugh Walpole, Sir Hugh Seymour Walpole, Sir Spencer Walpurga, Saint Walpurgis Night Walpurgisnacht walpurgite Walras, Léon Walras, Leon Marie Esprit Walras, Léon Marie Esprit Walrus Walrus Tusk Walsall Walschap, Gerard Walser, Martin Walsh Walsh code Walsh codes Walsh County Walsh, Bill Walsh, Edward Walsh, James A. Walsh, Lawrence E. Walsh, Raoul Walsh, Thomas James Walsingham Walsingham, Sir Francis Walsingham, Thomas Walstan, St. Walt Disney Walt Whitman Walt Whitman Birthplace State Historic Site Walt Whitman House State Historic Site Walt Whitman Rostow Waltari, Mika Waltari, Mika Toimi Walter Walter Arnold Walter Benjamin Walter Bradford Cannon Walter Brattain Walter Citrine Walter Cunningham			Walrus Tusk Walrus-sized handlebar mustache walruses walruses walruses Wals Wals WALSA WALSAA WALSAIP Walsall Walsall Walsall Walsall Borough Strategic Partnership Walsall Football Club Walsall Housing Group Walsall Junior Youth League Walsall Lifelong Learning Alliance Walsall Local History Centre Walsall Metropolitan Borough Council Walsall, England Walsall, England Walschap, Gerard Walser, Martin Walsh Walsh Walsh (disambiguation) Walsh (disambiguation) Walsh code Walsh Code Assignment Algorithm Walsh codes Walsh College Accounting Club Walsh County Walsh County, ND Walsh County, North Dakota Walsh Fair Walsh Intermediate School Walsh Jesuit High School Walsh Title and Real Estate Walsh University Student Government Walsh, Bill Walsh, Courtney (Andrew) Walsh, Courtney (Andrew) Walsh, Edward Walsh, James A. Walsh, Lawrence E. Walsh, Raoul Walsh, Thomas James Walsh-Hadamard Walsh-Hadamard code Walsh-Hadamard Transform Walsingham Walsingham Walsingham, Norfolk Walsingham, Norfolk Walsingham, Sir Francis Walsingham, Sir Francis Walsingham, Thomas

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Walsh code (redirected from Walsh codes)

Walsh code
(redirected from Walsh codes)