Title :
Directional signal modulation by means of switched spaced antennas
Author :
Baghdady, Elie J.
Author_Institution :
EJB Res. Associates, Weston, MA, USA
fDate :
4/1/1990 12:00:00 AM
Abstract :
The theory of modulation by hopping or by commutation among a number of spaced antennas is presented. The theory brings out the important considerations and criteria for determining the separation of discrete antennas in time and/or space that produces a desired modulation. In addition, antenna hopping and commutation are proposed for generating direction-dependent spread spectrum to enhance receiving system anti-interference processing gain and/or transmitted signal camouflage and LPI, as well as to provide an effective means for channel monitoring and analytical probing
Keywords :
frequency shift keying; phase shift keying; receiving antennas; spread spectrum communication; FSK; PSK; antenna communications; antenna hopping; direction-dependent spread spectrum; directional signal modulation; switched spaced antennas; Antenna theory; Directive antennas; Joining processes; Monitoring; Phase modulation; Receiving antennas; Spread spectrum communication; Switches; Timing; Transmitting antennas;
Journal_Title :
Communications, IEEE Transactions on
