Title:
DIGITAL BASEBAND RECEIVER INCLUDING A HIGH PASS FILTER COMPENSATION MODULE FOR SUPPRESSING GROUP DELAY VARIATION DISTORTION INCURRED DUE TO ANALOG HIGH PASS FILTER DEFICIENCIES
Document Type and Number:
WIPO Patent Application WO2005006567
Kind Code:
A3
Abstract:
A digital baseband (DBB) radio frequency (RF) receiver (105) includes a digital high pass filter compensation (HPFC) module (205) used to suppress group delay variation distortion caused by using low cost analog high pass filters (HPFO) (175A, 175B, 185A, 185B) in the receiver. The digital HPFC module (205) reduces a cutoff frequency, established by the HPFs for the real and imaginary signal component frequency domain responses by providing a first compensation signal having a first predetermined value (K1). The digital HPFC module adjusts the gain of the high pass response of the real and imaginary signal component frequency domains by providing a second compensation signal having a second predetermined value (K2).
Inventors:
DEMIR ALPASLAN (US)
KAZAKEVICH LEONID (US)
HAQUE TANBIR (US)
KAZAKEVICH LEONID (US)
HAQUE TANBIR (US)
Application Number:
PCT/US2004/015800
Publication Date:
March 30, 2006
Filing Date:
May 20, 2004
Export Citation:
Assignee:
INTERDIGITAL TECH CORP (US)
DEMIR ALPASLAN (US)
KAZAKEVICH LEONID (US)
HAQUE TANBIR (US)
DEMIR ALPASLAN (US)
KAZAKEVICH LEONID (US)
HAQUE TANBIR (US)
International Classes:
H03D3/00; (IPC1-7): H03D3/00
Foreign References:
| US20050070240A1 | 2005-03-31 | |||
| US20020064239A1 | 2002-05-30 |
Other References:
See also references of EP 1642392A4
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