Abstract: A low profile receiving and/or transmitting antenna includes an array of antenna elements that collect and coherently combine millimeter wave or other radiation. The antenna elements are physically configured so that radiation at a predetermined wavelength band impinging on the antenna at a particular angle of incidence is collected by the elements and collected in-phase. Two or more mechanical rotators may be disposed to alter the angle of incidence of incoming or outgoing radiation to match the particular angle of incidence.

Abstract: A low profile receiving and/or transmitting antenna includes an array of antenna elements that collect and coherently combine millimeter wave or other radiation. The antenna elements are physically configured so that radiation at a predetermined wavelength band impinging on the antenna at a particular angle of incidence is collected by the elements and collected in-phase. Two or more mechanical rotators may be disposed to alter the angle of incidence of incoming or outgoing radiation to match the particular angle of incidence.

Abstract: A low profile receiving and/or transmitting antenna includes an array of antenna elements that collect and coherently combine millimeter wave or other radiation. The antenna elements are physically configured so that radiation at a predetermined wavelength band impinging on the antenna at a particular angle of incidence is collected by the elements and collected in-phase. Two or more mechanical rotators may be disposed to alter the angle of incidence of incoming or outgoing radiation to match the particular angle of incidence.

Abstract: A low profile receiving and/or transmitting antenna includes an array of antenna elements that collect and coherently combine millimeter wave or other radiation. The antenna elements are physically configured so that radiation at a predetermined wavelength band impinging on the antenna at a particular angle of incidence is collected by the elements and collected in-phase. Two or more mechanical rotators may be disposed to alter the angle of incidence of incoming or outgoing radiation to match the particular angle of incidence.

Abstract: A method for enabling synchronization of a communications terminal in a wireless communication system, and a corresponding acquisition system of the communications terminal, wherein the method consists of the steps of: receiving a burst at a receiver of the communications terminal, the burst containing a composite waveform including two or more component waveforms, wherein each of the two or more waveforms has a known frequency variation throughout the burst; detecting the presence of the composite waveform; and estimating a frequency offset and a timing offset of the composite waveform as received into the receiver, whereby synchronization is achieved.

Abstract: A low profile receiving and/or transmitting antenna includes an array of antenna elements that collect and coherently combine millimeter wave or other radiation. The antenna elements are physically configured so that radiation at a predetermined wavelength band impinging on the antenna at a particular angle of incidence is collected by the elements and collected in-phase. Two or more mechanical rotators may be disposed to alter the angle of incidence of incoming or outgoing radiation to match the particular angel of incidence.

Abstract: A low profile receiving and/or transmitting antenna includes an array of antenna elements that collect and coherently combine millimeter wave or other radiation. The antenna elements are physically configured so that radiation at a predetermined wavelength band impinging on the antenna at a particular angle of incidence is collected by the elements and collected in-phase. Two or more mechanical rotators may be disposed to alter the angle of incidence of incoming or outgoing radiation to match the particular angel of incidence.

Abstract: A waveform to be transmitted as a burst within a channel that is used for the synchronization of unsynchronized wireless communications terminals in a wireless communications system, and a method of synchronization involving the waveform, that consists of a composite waveform. The composite waveform comprises two or more component waveforms, wherein each of the two or more component waveforms has a known frequency variation throughout the burst. The composite waveform has a composite bandwidth on an order of an available channel bandwidth and each of said two or more component waveforms have a component bandwidth on the order of the available channel bandwidth. Furthermore, a range of values for the differences between the instantaneous frequencies of two of said two or more component waveforms is on an order of twice of said available channel bandwidth.

Abstract: A communication system that communicates between a base station and a mobile station over a wireless rf channel. The communication system uses a novel protocol for transmitting a data frame in which an 8-bit data byte is divided into two 4-bit data nibbles. Each data nibble is assigned a 4-bit sequence number to form a transmission byte. By determining the sequence number of any transmission byte or series of transmission bytes, the beginning and the end of a data frame can be determined. A CRC check indicates when a data frame has been received successfully. The protocol does not require the use of unique start-of-frame (SOF) and end of-frame (EOF) characters. Also, the system implements a majority vote algorithm that collects data from successively transmitted copies of a given data frame and performs a majority vote to determine a mostly likely received data pattern. The protocol allows the system to achieve an improvement analogous to a 1.5 to 2.

Abstract: A frequency shift keyed demodulator system employs a first bandpass filter having a passband centered at a first frequency; a second bandpass filter having a passband centered at a second frequency; a first Goertzel's discrete Fourier transform processor coupled to an output of the first bandpass filter; a second Goertzel's discrete Fourier transform processor coupled to an output of the second bandpass filter; and an adder coupled to an output of the first Goertzel's discrete Fourier transform processor, and to an output of the second Goertzel's discrete Fourier transform processor.

Abstract: A digital FM modulator (10) which functions to modulate a fixed frequency, e.g. RF, reference signal f.sub.r with an incoming AM analog signal v(t) by way of utilization of digital signal processing circuitry (14, 18, 22, 26, 28, 38, 48). The digital FM modulator 10 includes a digital encoder, e.g. a codec 14, which samples the incoming analog signal v(t) at a prescribed sampling rate f.sub.s, and converts it into a digital signal S.sub.D comprised of successive digital words representative of a prescribed parameter (e.g. amplitude) of the analog signal v(t) at corresponding, successive sampling times t.sub.i. This digital signal S.sub.D is a digital data stream which is subsequently conditioned for input to a direct, digital synthesizer (DDS) (48), which, in response to this input, synthesizes an output signal having I.sub.A and Q.sub.A components disposed in phase quadrature relation to each other. The DDS output signal components I.sub.A and Q.sub.