Abstract:
A clock extractor extracts clock frequency f2, from a wired data connection feeding the transmitter with data clocked at the clock frequency f2. A clock error estimator estimates clock frequency error between the clock frequency f2 and a clock frequency f1 derived from a local clock of the transmitter. Clock adder adds the clock frequency error to the clock frequency f1, resulting in a synthesized clock frequency f2. A modulator uses the synthesized clock frequency f2, to modulate a data stream into a modulated signal.
Abstract:
A system for fault-tolerant communication includes N nodes, out of which one is a gateway node, and N data links, each data link connecting two of the nodes, forming a ring structure. At least two of the data links are wireless data links. The system substantially do not use one of the wireless data links to send data, effectively partitioning the ring structure into a first chain and a second chain. The system sends data downstream direction and upstream direction, through the first and second chains. The system detaches at least one node from the first chain, by substantially stop using a wireless data link having a reduction in performance and belonging to the first chain, and connects the at least one node to the second chain by starting to use the wireless data link that was substantially not in use.
Abstract:
A system for communicating between Radio Access nodes includes a Radio Access Network (RAN) comprising a plurality of Radio Access nodes and a backhaul system interconnecting the Radio Access nodes. The backhaul system identifies at least some paths belonging to the backhaul system, each path interconnecting a pair of Radio Access nodes belonging to the RAN. The backhaul system ascertains, per path, at least one type of Traffic Engineering (TE) metric associated with transporting data between a pair of Radio Access nodes, and convey, per path, the TE metric, to the pair of Radio Access nodes. Optionally, the pair of Radio Access nodes perform a real-time data exchange, provided that the TE metric, conveyed to one of the Radio Access node of the pair, indicates that such an exchange is viable using the path. Optionally, at least some of the paths comprise wireless data links.
Abstract:
A method for performing rate adaptation of millimeter wave transmissions in a substantially line-of-sight OFDM outdoor system over a radio frequency (RF) channel includes the following. First a channel quality estimator indicative of a quality of an outdoor millimeter-wave RF channel is received. A sequence of parameter changes is defined to dynamically adjust transmission quality for the rate adaptation. The rate adaptation includes dynamic adaptation of bandwidth and at least one other parameter. The sequence is stored as a table of vectors, each vector comprising a combination of parameters where one of parameters is bandwidth. The parameter vectors in the table are dynamically worked through in response to the channel quality estimator.
Abstract:
A compact millimeter-wave radio system is comprised of an antenna body with reflector region and waveguide region all made from a single piece of material, and a radio receiver that is mounted on a substrate which is mechanically fixed to and held by the waveguide region. The system presents compact, relatively inexpensive, and relatively effective heat dissipation, solution for receiving and transmitting millimeter waves.
Abstract:
An ultra-high-bandwidth low-power-consumption wireless communication system includes (i) a Radio Frequency Integrated Circuit (RFIC) comprising a radio transmitter, transmitting millimeter-wave signals. The radio transmitter includes a Power Amplifier (PA) outputting the millimeter-wave signals at a low power level of between −10 dBm and 20 dBm, and by that allowing inclusion of the PA in the RFIC. The radio transmitter further includes a Voltage Controlled Oscillator (VCO) and a synthesizer driving a mixer up-converting signals into the millimeter-wave signals. The VCO and synthesizer have a combined phase noise between a first level and a second level, wherein the first level is high enough to allow inclusion of the VCO and synthesizer in the RFIC, and the second level is low enough to facilitate transmitting at 16-levels Quadrature-Amplitude-Modulation (16QAM).
Abstract:
Systems and methods for utilizing millimeter-wave radio components in synthesizing microwave signals. A first up-conversion frequency generated using millimeter-wave radio components is used to up-convert a baseband signal into a first millimeter-wave signal, which is then down-converted into a microwave signal using a second and lower down-conversion frequency generated using additional millimeter-wave radio components. Using millimeter-wave conversion frequencies allows for tight integration of multiple transmission and reception chains while facilitating good coexistence of different microwave channels, and further allows for a wide span of frequencies over which microwave transmissions can be made.
Abstract:
Various embodiments of a millimeter-wave wireless point-to-point or point-to-multipoint communication system which enables determining preferred directions of transmissions, and transmitting in such preferred directions without routing radio-frequency signals. The system comprises a millimeter-wave focusing element, multiple millimeter-wave antennas, and multiple radio-frequency-integrated circuits (“RFICs”). In various embodiments, preferred directions are determined, and millimeter-wave beams are transmitted in the preferred directions.
Abstract:
A millimeter-wave communication component includes at least two millimeter-wave antennas located at two opposite sides thereof, in which the entire millimeter-wave communication component constitutes a single rigid mechanical element that can be easily mounted on a side of a pole, such that the millimeter-wave communication component is situated in front of the pole, and thereby positioning one of the millimeter-wave antennas to the right of the pole, and one of the other millimeter-wave antennas to the left of the pole. Said positioning of the two millimeter-wave antennas enables them to generate two millimeter-wave radiation pattern that together, and cooperatively, cover an entire and continuous sector surrounding the back of the pole. Further millimeter-wave antennas may be added to complete the coverage to a continuous 360 degrees coverage, while maintaining simple installation of the millimeter-wave communication component on the pole as a single rigid mechanical element.
Abstract:
A compact millimeter-wave radio system is comprised of an antenna body with reflector region and waveguide region all made from a single piece of material, and a radio receiver that is mounted on a substrate which is mechanically fixed to and held by the waveguide region. The system presents compact, relatively inexpensive, and relatively effective heat dissipation, solution for receiving and transmitting millimeter waves.