Method and apparatus for high speed digital phased array coheren

Details Method and apparatus for high speed digital phased array coheren Method and apparatus for high speed digital phased array coheren

1987-06-01

1989-06-13

Miska, Vit W.

Coded data generation or conversion

Sample and hold

341123, 341166, 364178, 328151, 358138, H03M 164

Patent

active

048396524

ABSTRACT:
A method for generating an output stream of digital data words, with each data word representing the amplitude of an analog signal at one of a multiplicity F samples each second and with substantially equally spaced time intervals T therebetween, is obtained from a digital baseband demodulation system used for array beam forming. A data stream, formed of interleaved ADC output digital data words acquired from a set of converters, is at a rate of F total samples/second. Subsequent digital demodulation, filtration, and decimation provides digital output signals which need less delay resolution prior to the formation of coherent sum signals, thereby reducing overall channel memory requirements. The output baseband data stream has enhanced dynamic range, thereby reducing the ADC bit density requirements.

REFERENCES:
patent: 4345241 (1982-08-01), Takeuchi et al.
patent: 4673916 (1987-06-01), Kitamura et al.
patent: 4677626 (1987-06-01), Betts et al.

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