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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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Further details of Walsh code assignments for traffic channels along with allowable data rates and corresponding post-interleaver repetition rates can be found in [1].
It is capable of lightning-fast scans in multiple frequency bands, with multiple technologies, doing PN and Walsh Code, CPICH, DVCC, and BSIC decoding simultaneously.
 
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