Nonsinusoidal waves for radar and radio communication

Radio signals with large relative bandwidth are considered along with radiators and receptors, and selective receivers, taking into account carrier-free signals, sinusoidal carriers, nonsinusoidal carriers, frequency-independent antennas, a Hertzian dipole, a receiver for general periodic waves, radio-sequency filter, a sequency converter, an intermediate-sequency filter, a waveform discriminator, and a receiver for nonperiodic waves. Applications in radar are examined, giving attention to low-angle tracking, synthetic aperture radar, a tracking radar and beam rider, and look-down radar. Topics discussed in connection with advanced signal design and processing are related to carrier coding and baseband coding, the thumbtack ambiguity function, and velocity and acceleration processing. Subjects explored in the area of radio communication with submarines include the bandwidth required for teletype and data links, attenuation in seawater and antenna gain, distortion of signals in seawater, the best frequency band as function of depth, typical circuits, a comparison of various systems, local and distant noise, and radiation from a submarine.