Fast Walsh transform (FWT) demodulator and method thereof

Details Fast Walsh transform (FWT) demodulator and method thereof Fast Walsh transform (FWT) demodulator and method thereof

2004-11-29

2008-05-06

Ghayour, Mohammed (Department: 2611)

Pulse or digital communications

Receivers

Particular pulse demodulator or detector

C375S340000, C375S324000

Reexamination Certificate

active

07369630

ABSTRACT:
A fast Walsh transform (FWT) demodulator and a method are provided. The FWT demodulator includes a FWT correlator for receiving and transforming a first information based on a FWT method to output third information; power approximation devices (PAD) for receiving and calculating one of the third information to output an approximating power value respectively. Wherein, the approximating power values are divided into subgroups. A first unit of comparators selects subgroup-max-values from each subgroup. A plurality of power calculation devices (PCD) are for receiving and calculating one of the subgroup-max-value to output a precise power value respectively. A second unit of comparators is for selecting max power value from each precise power value to output a second information. By applying “PAD” to replace “PCD” into “pre-selection” subgroups with “max-and-zero” property, the invention can reduce the implementation cost without performance degradation.

REFERENCES:
patent: 6067315 (2000-05-01), Sandin
patent: 6154487 (2000-11-01), Murai et al.
patent: 6882692 (2005-04-01), Somayazulu
patent: 7079592 (2006-07-01), Chang et al.
patent: 7200164 (2007-04-01), Chen et al.
patent: 2003/0058972 (2003-03-01), Iochi
patent: 2005/0135511 (2005-06-01), Molina
Kim et al., A Bandwidth-Power Efficient Modulation Scheme Based On Quaternary Quasi-Orthogonal Sequences, Jul. 2003, IEEE Communicationss Letters, vol. 7, Issue 7, pp. 293-295.

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