Abstract: A first downlink transmission beam and a second downlink transmission beam is determined based on a received user-derived signal. The first downlink transmission beam is substantially uncorrelated with the second downlink transmission beam. The first downlink transmission beam is associated with a portion within a first sector. The second downlink transmission beam is associated with a portion within a second sector. A first signal is diversity encoded to produce a first diversity-encoded signal. A second signal is diversity encoded to produce a second diversity-encoded signal. The first diversity-encoded signal is sent over the first downlink transmission beam. The second diversity-encoded signal is sent over the second downlink transmission beam.

Abstract: Method and apparatus for high resolution tracking via mono-pulse beam-forming in a communication system in which the capacity and range of mobile or fixed wireless communication base stations are improved by implementing a single or multiple antenna beam per signal path. Adaptive beam-forming based on up-link direction-of arrival estimation can be performed without using the above-mentioned computationally intensive techniques.

Abstract: The laser diode modulator disclosed herein employs a series of field-effect transistors provided with an input circuit utilizing a succession of inductive elements arranged to form a lumped element transmission line of essentially constant characteristic impedance. The drain or output terminals of the transistors drive an output circuit employing a series of inductive elements which, together with shunt capacitors, form a singly terminated filter providing a graduated and decreasing characteristic impedance. The laser diode is connected as the termination of the filter.