Coded data generation or conversion – Converter compensation
Reexamination Certificate
2005-05-17
2005-05-17
Williams, Howard L. (Department: 2819)
Coded data generation or conversion
Converter compensation
C341S155000
Reexamination Certificate
active
06894630
ABSTRACT:
The invention comprises an array of ADCs, associated either with spatially separated signal input devices such as for example antennae, or with a single signal input device and a plurality of filters having a variable phase delay, which provide a digital output which is processed to remove spurious signals introduced by the ADCs thereby providing a linearised output. An array of N antennae with respective band pass filters and ADCs (10) feeds received signals into a frequency channelisation device (12) which divides each of the N input streams into M lower bandwidth streams for distribution. In a first path, an FFT (14) is used to detect signal of interest, to determine where intermodulation products arm likely to exist and to provide course data for the spatial processing used in the signal separation sub-systems. The second path (16) includes the detection and separation of co-channels signals. Signal classification techniques are then used to identify spurious sir, which are then removed.
REFERENCES:
patent: 4675606 (1987-06-01), Ganguly
patent: 5262789 (1993-11-01), Silverstein
patent: 5294926 (1994-03-01), Corcoran
patent: 5568142 (1996-10-01), Velazquez et al.
patent: 5659546 (1997-08-01), Elder
patent: 5815117 (1998-09-01), Kolanek
patent: 6463093 (2002-10-01), Komara et al.
patent: 2233518 (1991-01-01), None
patent: 2255457 (1992-11-01), None
Hummels, D.M. et al., Distortion compensation for time-interleaved analog to digital converters, IEEE Instrumentation and Measurement Technology Conference, 1996. IMTC-96. Conference Proceedings., vol. 1, pp.:728-731.*
Tsimbinos, J. et al.; Applications of higher-order statistics to modelling, identification and cancellation of nonlinear distortion in high-speed samplers and analogue-to-digital converters using the Volterra and Wiener models; IEEE Signal Processing Workshop on Higher-Order Statistics, 1993. , Jun. 7-9, 1993 pp.: 379-383.*
Derwent Abstract Accession No. 97-090570/09, Class U13U14, JP 08 327681, Class U13U14. total p. 1, Dec. 1996.
IEEE International Conference on Acoustics, Speech and Signal Processing, Apr. 1994.
Tsui, James B-Y. (1989).Digital Microwave Receivers Theory and Concepts. Artec House, Inc. total pp. v-viii. (Table of Contents).
Walden, R. H. (Apr. 1999). “Analog-to-Data Survey and Analysis,” IEEE SAC 17(4):539-550. at Fig. 5.
Supplementary European Search Report issued Jan. 21, 2003, for EP Patent Application 00 97 2473, two pages.
Kitchen John
Marwood Warren
Massie Angus
The Commonwealth of Australia
Williams Howard L.
LandOfFree
Enhanced direct digitizing array arrangement does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Enhanced direct digitizing array arrangement, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Enhanced direct digitizing array arrangement will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3433608