Abstract: A plurality of substantially interference-free radar systems, each comprising: means for generating pseudorandom waveforms for sequential transmission by radar; and a radar transmitting and receiving phased array antenna having a horizontal beamangle of a few milli-radians (mR), and a vertical beamangle of about 25 mR.

Abstract: Digital radio link capable to solve the problem of high-volume data transmission in environments with multiple reflections, such as urban areas, inside buildings, etc. The said radio link can be used as a radiotelephone network or a local network for connecting computers. Essentially, it consists of a standard transmitter and a receiver consisting in turn of an antenna, a circulator, a pass band filter, a LNA amplifier, a group of frequency converters, an AGC amplifier, a buffer, a bank of matched filters, an amplifier compensating the filter losses, a quadratic detector, a path combiner, a video amplifier, a matched threshold generator, a bank of comparators, a decision-making block (essentially consisting of a multiplexer), a time-base regenerator and, an alarm.