TW200610331A - Fast walsh transform (fwt) demodulator and method thereof - Google Patents

Fast walsh transform (fwt) demodulator and method thereof

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Publication number
TW200610331A
TW200610331A TW093127123A TW93127123A TW200610331A TW 200610331 A TW200610331 A TW 200610331A TW 093127123 A TW093127123 A TW 093127123A TW 93127123 A TW93127123 A TW 93127123A TW 200610331 A TW200610331 A TW 200610331A
Authority
TW
Taiwan
Prior art keywords
fwt
max
power
demodulator
data
Prior art date
Application number
TW093127123A
Other languages
Chinese (zh)
Other versions
TWI256809B (en
Inventor
Mau-Lin Wu
Original Assignee
Faraday Tech Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Faraday Tech Corp filed Critical Faraday Tech Corp
Priority to TW93127123A priority Critical patent/TWI256809B/en
Publication of TW200610331A publication Critical patent/TW200610331A/en
Application granted granted Critical
Publication of TWI256809B publication Critical patent/TWI256809B/en

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Abstract

A fast Walsh transform (FWT) demodulator and a method thereof are provided. The FWT demodulator includes a FWT correlator for receiving and transforming a first data base on a FWT method to outputs a plurality of third data; a plurality of power approximation device (PAD) for receiving and calculating one of the third data to outputs an approximating power value respectively, the approximating power values are separated into a plurality of subgroup; a first set of comparators for choosing a plurality of subgroup-max-value from each subgroups; a plurality of power colculation device (PCD) for receiving and calculating one of the subgroup-max-value to outputs a exact power value respectively; and a second set of comparators for choosing max power value from each exact power values to output a second data. By apply "PAD" to replace "PCD" into "pre-selection" subgroups with "max-and-zero" property, the invention can reduce the implementation cost without performance degradation.
TW93127123A 2004-09-08 2004-09-08 Fast walsh transform (FWT) demodulator and method thereof TWI256809B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
TW93127123A TWI256809B (en) 2004-09-08 2004-09-08 Fast walsh transform (FWT) demodulator and method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW93127123A TWI256809B (en) 2004-09-08 2004-09-08 Fast walsh transform (FWT) demodulator and method thereof

Publications (2)

Publication Number Publication Date
TW200610331A true TW200610331A (en) 2006-03-16
TWI256809B TWI256809B (en) 2006-06-11

Family

ID=37614786

Family Applications (1)

Application Number Title Priority Date Filing Date
TW93127123A TWI256809B (en) 2004-09-08 2004-09-08 Fast walsh transform (FWT) demodulator and method thereof

Country Status (1)

Country Link
TW (1) TWI256809B (en)

Also Published As

Publication number Publication date
TWI256809B (en) 2006-06-11

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Legal Events

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MM4A Annulment or lapse of patent due to non-payment of fees