Time domain radio transmission system

Abstract

A time domain communications system wherein a broadband of time-spaced signals, essentially monocycle-like signals, are derived from applying stepped-in-amplitude signals to a broadband antenna, in this case, a reverse bicone antenna. When received, the thus transmitted signals are multiplied by a D.C. replica of each transmitted signal, and thereafter, they are, successively, short time and long time integrated to achieve detection.

1 . In a wideband radio system, a receiver, said receiver adapted to detect wideband burst signals, said wideband burst signals having a time spacing, comprising: 
 an antenna capable of converting said wideband burst signals impingent thereon from free space into received signals;    a local waveform generator configured to generate local signals, said local signals being substantially similar to said received signals;    a coincidence detector responsive to said received signals and to said local signals such that said received signals and said local signals synchronously arrive at said coincidence detector in accordance with said time spacing, said coincidence detector generating a product signal, said product signal being the product of one of said received signals and one of said local signals;    an integrator means responsive to said product signal, wherein said wideband burst signals comprise shaped signals, further comprising a filter having an input, said input being coupled to said antenna and having an output, said output coupled to said coincidence detector, and wherein said filter has a filter response, said filter response being the reciprocal of said shaped signals.    
   
   
       2 . In a wideband radio system, a receiver, said receiver adapted to detect wideband burst signals, said wideband burst signals having a time spacing, comprising: 
 an antenna capable of converting said wideband burst signals impingent thereon from free space into received signals;    a local waveform generator configured to generate local signals, said local signals being substantially similar to said received signals;    a coincidence detector responsive to said received signals and to said local signals such that said received signals and said local signals synchronously arrive at said coincidence detector in accordance with said time spacing, said coincidence detector generating a product signal, said product signal being the product of one of said received signals and one of said local signals; and    an integrator means responsive to said product signal, wherein said wideband burst signals comprise shaped signals, wherein shaping of said shaped signals is a form of encoding, wherein said receiver is adapted to decode said form of encoding based upon said shaping of said shaped signals.    
   
   
       3 . In a wideband radio system, a receiver, said receiver adapted to detect wideband burst signals, said wideband burst signals having a time spacing, comprising: 
 an antenna capable of converting said wideband burst signals impingent thereon from free space into received signals;    a local waveform generator configured to generate local signals, said local signals being substantially similar to said received signals;    a coincidence detector responsive to said received signals and to said local signals such that said received signals and said local signals synchronously arrive at said coincidence detector in accordance with said time spacing, said coincidence detector generating a product signal, said product signal being the product of one of said received signals and one of said local signals; and    an integrator means responsive to said product signal, wherein said integrator means is comprised of: 
 a first integrator, responsive to said product signal output from said coincidence detector; said first integrator providing a first integrated signal; and  
 a second integrator responsive to said first integrated signal, said second integrator providing a second integrated signal, said second integrated signal being the integral of a plurality of first integrated signals.  
   
   
   
       4 . The receiver according to  claim 3 , further comprising a means for digitizing said second integrated signal.  
   
   
       5 . A method of detecting wideband burst signals transmitted through free space, said wideband burst signals having a time spacing, comprising the steps of: 
 converting each of said wideband burst signals into a received signal;    generating a local signal, said local signal being substantially similar to said received signal;    synchronously multiplying said received signal by said local signal to generate a product signal;    integrating said product signal, wherein said wideband burst signals comprise shaped signals, wherein said shaping of said shaped signals is a form of encoding; and    decoding information based upon said shaping.    
   
   
       6 . A method of detecting wideband burst signals transmitted through free space, said wideband burst signals having a time spacing, comprising the steps of: 
 converting each of said wideband burst signals into a received signal;    generating a local signal, said local signal being substantially similar to said received signal;    synchronously multiplying said received signal by said local signal to generate a product signal; and    integrating said product signal, wherein said step of converting includes filtering each of said wideband burst signals, wherein said filtering is performed by a matched filter.    
   
   
       7 . A method of detecting wideband burst signals transmitted through free space, said wideband burst signals having a time spacing, comprising the steps of: 
 converting each of said wideband burst signals into a received signal;    generating a local signal, said local signal being substantially similar to said received signal;    synchronously multiplying said received signal by said local signal to generate a product signal; and    integrating said product signal, wherein said step of integrating generates a first integrated signal, and further comprising the step of generating a second integrated signal by integrating a plurality of first integrated signals.    
   
   
       8 . A wideband radio receiver, capable of detecting wideband burst signals transmitted through free space, said wideband burst signals having a time spacing, said receiver comprising: 
 an antenna capable of converting said wideband burst signals impingent thereon into received signals;    a coincidence detector, responsive to said received signals, said coincidence detector configured to output a product signal, said product signal being the product of one of said received signals and a template signal arriving at said coincidence detector synchronously with said received signal; and    an integrator responsive to said product signal.    
   
   
       9 . The wideband radio receiver of  claim 8 , wherein said template signal is locally generated.