Moving target indicator system utilizing charge coupled device

A processor for determining changes between energy representative of the intensity of portions of first and second fields of a scene comprising:

• a plurality of means each including a source of current representative of the energy from said scene and including a CCD integrating bucket receiving current from said source of current for sequentially integrating charges representative of said first and second fields,
• a CCD storage register having a sequence of a plurality of first and second bit storage positions along said register, each first bit storage position coupled to a different integrating bucket for sequentially receiving signal charges from said integrating buckets for said first and second fields, each of said bit storage positions of said sequence having at least one isolation bit position between each of said bit storage positions of said sequence,
• means for shifting the signal charges in said storage register from the first to the second bit positions after receiving said signal charges from said first field from said integrating buckets,
• means for shifting the signal charges of said first and second fields in said storage register to an output end of said storage register, and
• means coupled to the output end of said storage register for comparing the shifted signal charges from said first and second fields.

A moving target indicator system comprising:

• a plurality of rows of detectors receiving first and second fields of data,
• a plurality of rows of CCD shift registers having a plurality of bit positions with each detector in each row coupled to each fourth bit position in the corresponding shift register row,
• charge storage means coupled between each detector and the row shift register for integrating the first and second fields of data before being transferred into said rows of shift registers,
• an output CCD shift register having a plurality of bit positions with each fourth bit position coupled to receive an output from a different row of shift registers,
• control means coupled to said plurality of rows of CCD shift registers to provide signals so that first and second fields of data are alternately transferred from said detectors to said rows of shift registers and including clock means coupled to said rows of shift registers for shifting the signal charges two bit positions between transfer of said first and second fields of data, said control means coupled to said output CCD shift register for providing signals so that each fourth bit position of said output CCD shift register receives an output from a different row of shift registers, and
• differencing means coupled to an output end of said output shift register for comparing the values of sequential pairs of second bit positions.

A system for determining changes between first and second fields in a scene comprising:

• a plurality of rows of detectors,
• a plurality of rows of CCD registers each having a plurality of first and second storage units with each storage unit having first and second bit positions,
• integrating means for integrating signal data of each field and coupled between each detector of each row of detectors and the first bit positions of the first storage units of corresponding rows of said plurality of rows of registers for receiving signal current from the detector representative of said signal data,
• means for transferring the integrated signal data of said first and second fields to the plurality of rows of registers,
• clocking means coupled to said plurality of rows of registers for shifting signal data from the first storage units to the second storage units between transfer of said first and second fields thereto,
• an output CCD register having a plurality of first and second storage units, each storage unit having first and second bit positions, each first storage unit of said output register coupled to an output of said plurality of rows of registers, and
• differencing means coupled to an output end of said output register for comparing the signal data of said first and second fields.

A time change determining processor for comparing energy representative of the intensity of a scene during first and second field times comprising:

• a CCD storage register sequentially having a plurality of first and second bit storage positions for storing signal charges representative of said scene,
• integrating means coupled to the first bit storage positions for providing storage charges to said storage register,
• a plurality of sources of current coupled to said integrating means, said plurality of sources of current providing said signal charges representative of said scene to said integrating means,
• clock means coupled to said storage register for transferring said signal charges from said first storage positions to said second storage positions between first and second field times so that adjacent signal charges substantially represent the same portion of the scene, and for transferring said signal charges to an output end of said storage register when the charges from said first and second fields are in said storage register, and
• means including differencing means coupled to the output end of said storage register for comparing the value of adjacent signal charges.

A system for determining changes of portions of a scene between first and second fields, each field including a plurality of sub-fields comprising:

• a plurality of detectors for receiving signals from said scene,
• CCD storage means having a plurality of bit positions,
• integrating means including CCD storage buckets for integrating each sub-field and coupled from each detector to selected bit positions of said storage means,
• CCD demultiplexer means coupled to said storage means,
• CCD integration means having a plurality of bit positions and coupled to said demultiplexer means,
• readout means coupled to said CCD integration means,
• multiplexer means coupled to said readout means,
• differencing means coupled to said multiplexer means, and
• clock means coupled to said storage means and to said demultiplexer means for providing clock signals for transferring each sub-field signal data to said demultiplexer means, coupled to said CCD integration means for providing clock signals for integrating the sub-fields to form fields from each detector in bit positions with said first and second fields in sequential positions and for transferring said first and second fields to said readout means and coupled to said multiplexer means for transferring said first and second fields to said differencing means.

A system for determining changes between first and second fields of a scene, said first and second fields each including a plurality of sub-fields comprising:

• a plurality of rows of detectors, said rows of detectors forming columns of detectors,
• a plurality of rows of CCD registers each coupled to a row of detectors and each having a plurality of bit positions for receiving data,
• a first CCD register coupled to said plurality of rows of registers,
• a second CCD register coupled to said first register,
• a plurality of CCD row register means coupled to said second register each including an integrating register and a readout register,
• CCD output register means coupled to the readout registers of said plurality of row register means for receiving data of the first and second fields in sequence from each detector, and
• differencing means coupled to said output register means for sequentially comparing data of the first and second fields from each detector.