Apparatus and method for performing a signal search in a wireles

Details Apparatus and method for performing a signal search in a wireles Apparatus and method for performing a signal search in a wireles

1998-09-22

2000-08-22

Martin-Wallace, Valencia

Multiplex communications

Communication over free space

Having a plurality of contiguous regions served by...

375206, H04B 7216

Patent

active

061083240

ABSTRACT:
A search metric adjustor (401) for use in a base station receiver assembly (400) which operates in a CDMA wireless communication system conveying a mobile communication signal (107), is disclosed. The search metric adjustor (401) produces an adjusted energy value (490) that is utilized by a sorter (265) in a receiver signal searcher (200) to select a set of valid time offsets at which effective demodulation of the mobile communication signal (107) may occur. The search metric adjustor (401) compares a first plurality of Walsh symbol energy values (245), output from the receiver signal searcher (200), to a second plurality of Walsh symbol energy values (342), output from a spread spectrum receiver (300). The comparison yields a walsh symbol match count (470), correlated to a predetermined energy value (480) which is then added to an energy metric (241) to produce the adjusted energy value (490).

REFERENCES:
patent: 5530716 (1996-06-01), Lipa

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