Measurement and signature intelligence analysis and reduction technique

A method for compressing received data comprising a received In-phase (I) component and a received Quadrature (Q) component, the method comprising the steps of:

• (a) transforming the received I component and the received Q component into a magnitude component and a phase component;
• (b) selecting a first number of bits from the magnitude component and a different second number of bits from the phase component;
• and
• (c) forming a converted I component and a converted Q component from the first number of bits and the different second number of bits.

An apparatus for compressing received data, the received data comprising a received In-phase (I) component and a received Quadrature (Q) component, the apparatus comprising:

• a preprocessor that determines a first statistical characteristic associated with the received I component and a second statistical characteristic associated with the received Q component and that converts the received I component into a converted I component in accordance with the first statistical characteristic and the received Q component into a converted Q component in accordance with a second statistical characteristic, wherein a first resolution of the converted I component and a second resolution of the converted Q component are reduced with respect to the received I and Q components, respectively;
• a transform module that transforms the converted I component into a transformed I component and the converted Q component into a transformed Q component;
• and
• a quantizer that obtains an indicator from the preprocessor about a data type of the received data, selects a quantization conversion table in accordance with the indicator, and quantizes the transformed I component into a quantized I transform and the transformed Q component into a quantized Q transform by utilizing the quantization conversion table.

An apparatus for decompressing data, comprising:

• an inverse quantizer that obtains a quantized I transform and a quantized Q transform, obtains an indicator about a data type that is associated with the data, selects a quantization conversion table in accordance with the indicator, and inverse quantizes the quantized I transform into a transformed I component and the quantized Q transform into a transformed Q component;
• an inverse transform module that inverse transforms the transformed I component into a converted I component and the transformed Q component into a converted Q component;
• and
• an inverse preprocessor that converts the converted I component into a decompressed I component and the converted Q component into a decompressed Q component, wherein the decompressed I component and the decompressed Q component comprise a greater number of bits than the converted I component and the converted Q component, respectively.

A method of compressing Synthetic Aperture Radar (SAR) data into compressed data, the SAR data comprising a received In-phase (I) component and a received Quadrature (Q) component, the method comprising the steps of:

• (a) determining a first statistical characteristic associated with the received I component and a second statistical characteristic associated with the received Q component;
• (b) mapping the received I component to a first bin in accordance with the first statistical characteristic in order to form a converted I component, wherein a first plurality of bins comprises the first bin, wherein a first resolution of the converted I component is reduced with respect to the received I component, and wherein the first plurality of bins is assigned according to a first distribution of received I component data points;
• (c) mapping the received Q component to a second bin in accordance with the second statistical characteristic in order to form a converted Q component, wherein a second plurality of bins comprises the second bin, wherein a first resolution of the converted Q component is reduced with respect to the received I component, and wherein the second plurality of bins is assigned according to a second distribution of received Q component data points;
• (d) transforming the converted I component into a transformed I component and the converted Q component into a transformed Q component;
• (e) quantizing the transformed I component into a quantized I transform and the transformed Q component into a quantized Q transform;
• and
• (f) encoding the quantized I transform into a compressed I component and the quantized Q transform into a compressed Q component.

A method of compressing Synthetic Aperture Radar (SAR) data into compressed data, the SAR data comprising a received In-phase (I) component and a received Quadrature (Q) component, the method comprising the steps of:

• (a) transforming the received I component and the received Q component into a magnitude component and a phase component;
• (b) selecting a first number of bits from the magnitude component and a different second number of bits from the phase component;
• (c) forming a converted I component and a converted Q component from the first number of bits and the different second number of bits, wherein a first resolution of the converted I component is reduced with respect to the received I component and wherein a second resolution of the converted Q component is reduced with respect to the received Q component;
• (d) transforming the converted I component into a transformed I component and the converted Q component into a transformed Q component;
• (e) quantizing the transformed I component into a quantized I transform and the transformed Q component into a quantized Q transform;
• and
• (f) encoding the quantized I transform into a compressed I component and the quantized Q transform into a compressed Q component.