Compact floating point delta encoding for complex data

Abstract

A method, apparatus, and system for compression of complex data signals within a telecommunications base station. The system may include a transmitter configured to determine a larger value of either real or imaginary components of a digital complex signal. The transmitter designates an exponent of an exponential representation of the larger value as a common exponent to be used for compressing the digital complex signal. The transmitter also compresses a digital complex signal into a series of bits by sharing the common exponent across the real and imaginary components of the digital complex signal, and transmits the series of bits onto a physical medium of the communication system. The system may also include a receiver configured to receive the series of bits from the physical medium, and to expand the series of bits to reconstitute the digital complex signal by again sharing the common exponent across the real and imaginary components of the digital complex signal.

What is claimed is: 
     
         1 . A communication system, comprising:
 a transmitter configured to:
 determine a larger value of either real or imaginary components of a digital complex signal; 
 designate an exponent of an exponential representation of the larger value as a common exponent to be used for compressing the digital complex signal; 
 compress the digital complex signal into a series of bits by sharing the common exponent across the real and imaginary components of the digital complex signal; and 
 transmit the series of bits onto a physical medium of the communication system; and 
   a receiver configured to:
 receive the series of bits from the physical medium; and 
 expand the series of bits to reconstitute the digital complex signal by again sharing the common exponent across the real and imaginary components of the digital complex signal. 
   
     
     
         2 . The system of  claim 1 , wherein the transmitter is configured to compress the digital complex signal into a series of bits by sharing the common exponent across the real and imaginary components of the digital complex signal and delta-averaging. 
     
     
         3 . The system of  claim 2 , wherein the transmitter is configured to compress the digital complex signal into a series of bits by sharing the common exponent across the real and imaginary components of the digital complex signal, delta-averaging, and clipping. 
     
     
         4 . The system of  claim 1 , wherein the receiver is configured to expand the series of bits by sharing the common exponent across the real and imaginary components of the digital complex signal and delta-averaging. 
     
     
         5 . The system of  claim 4 , wherein the receiver is configured to expand the series of bits by sharing the common exponent across the real and imaginary components of the digital complex signal, delta-averaging, and clipping. 
     
     
         6 . The system of  claim 1 , comprising the physical medium of the communication system. 
     
     
         7 . A communication system, comprising a transmitter configured to:
 determine a larger value of either real or imaginary components of a digital complex signal;   designate an exponent of an exponential representation of the larger value as a common exponent to be used for compressing the digital complex signal;   compress the digital complex signal into a series of bits by sharing the common exponent across the real and imaginary components of the digital complex signal; and   transmit the series of bits onto a physical medium of the communication system.   
     
     
         8 . The system of  claim 7 , wherein the transmitter is configured to compress the digital complex signal into a series of bits by sharing the common exponent across the real and imaginary components of the digital complex signal and delta-averaging. 
     
     
         9 . The system of  claim 8 , wherein the transmitter is configured to compress the digital complex signal into a series of bits by sharing the common exponent across the real and imaginary components of the digital complex signal, delta-averaging, and clipping. 
     
     
         10 . A communication system, comprising a receiver configured to:
 receive a series of bits from a physical medium; and   expand the series of bits to reconstitute a digital complex signal by sharing a common exponent across real and imaginary components of the complex digital signal, the common exponent having been determined by determining a larger value of either real or imaginary components of the digital complex signal and designating an exponent of an exponential representation of the larger value as a common value, and the digital complex signal having been compressed into the series of bits by sharing the common exponents across the real and imaginary components of the digital complex signal.   
     
     
         11 . The system of  claim 10 , wherein the receiver is configured to expand the series of bits by sharing the common exponent across the real and imaginary components of the digital complex signal, and delta-averaging. 
     
     
         12 . The system of  claim 11 , wherein the receiver is configured to expand the series of bits by sharing the common exponent across the real and imaginary components of the digital complex signal, delta-averaging, and clipping.