摘要:
A frequency translating repeater (120) for use in a time division duplex (TDD) radio protocol communications system includes local oscillator (LO) circuits (210, 310, and 410) to facilitate repeating by providing isolation, reduced phase noise, reduced pulling, and the like. Tunable LOs (441, 442) can be directly coupled to down-converters (413, 414) and up-converters (426, 427) for increased isolation, reduced phase noise, less stringent frequency accuracy, and a reduced potential for pulling.
摘要:
A hybrid band intelligent backhaul radio (HB-IBR) is disclosed that is a combination of two radios operating in different bands. Embodiments include a dual radio configuration wherein a first radio operates in a non-line of sight (NLOS) radio link configuration and a second ancillary radio operates in a near line of sight or line of sight configuration (n)LOS. For example, the HB-IBR may have an Intelligent Backhaul Radio (IBR) operating in the non-line of sight mode of operation within the 5.8 GHz unlicensed band, and have an ancillary radio link operating in the FCC part 101E band of operation at 60 GHz. A common medium access control (MAC) block may be utilized between the dual radios.
摘要:
A intelligent backhaul radio is disclosed, which can operate by zero division duplexing for use in PTP or PMP topologies, providing for significant spectrum usage benefits among other benefits. Specific system architectures and structures to enable active cancellation of multiple transmit signals at multiple receivers within a MIMO radio are disclosed. Further disclosed aspects include the adaptive optimization of cancellation parameters or coefficients.
摘要:
An intelligent backhaul system is disclosed for deployment in the presence of existing radio systems. A backhaul system for co-channel deployment with existing licensed and unlicensed wireless networks, including conventional cellular backhaul radios, Common Carrier Fixed Point-to-Point Microwave Service, Private Operational Fixed Point-to-Point Microwave Service and other FCC 47 C.F.R. §101 licensed microwave networks is disclosed. Processing and network elements to manage and control the deployment and management of backhaul of radios that connect remote edge access networks to core networks in a geographic zone which co-exist with such existing systems or other sources of interference within a radio environment are also disclosed.
摘要:
A intelligent backhaul radio have an advanced antenna system for use in PTP or PMP topologies. The antenna system provides a significant diversity benefit. Antenna configurations are disclosed that provide for increased transmitter to receiver isolation, adaptive polarization and MIMO transmission equalization. Adaptive optimization of transmission parameters based upon side information provided in the form of metric feedback from a far end receiver utilizing the antenna system is also disclosed.
摘要:
A intelligent backhaul system is disclosed to manage and control multiple intelligent backhaul radios within a geographic zone. The intelligent backhaul system includes multiple intelligent backhaul radios (IBRs) that are able to function in both obstructed and unobstructed line of sight propagation conditions, one or more intelligent backhaul controllers (IBCs) connecting the IBRs with other network elements, and an intelligent backhaul management system (IBMS). The IBMS may include a private and/or public server and/or agents in one or more IBRs or IBCs.
摘要:
This application describes a modification to a wireless communication system protocol Medium Access Control layer in which certain short medium access control layer acknowledgments have higher layer acknowledgments appended to them in order to prevent the requirement of a data receiving node needing to contend for the wireless medium under asymmetric data traffic flow.
摘要:
A synchronous, interleaved, time-division 1:M demultiplexor uses M equally-spaced phases of a clock signal having a frequency of B/M to latch M incoming serial data bits (where B is the incoming bit rate and M is an integer power of two equal to or greater than four). Following an input stage of parallel synchronous latches, an intermediate stage of parallel synchronous latches is used in which the intermediate latches are clocked with selected phases of the M-phase clock to latch each bit at a time at least 2/B (i.e., two incoming bit periods) after such bit is received from its respective input latch. Following the intermediate stage of parallel synchronous latches, an output stage of parallel synchronous latches is used in which the output latches are clocked with at least one selected phase of the M-phase clock to latch each bit at a time at least 2/B after such bit is received from its respective intermediate latch.
摘要:
A synchronous, interleaved, time-division M:1 multiplexor. Following an input stage of parallel synchronous latches for latching M incoming parallel data bits (where M is an integer power of two equal to or greater than four) is an intermediate stage of parallel synchronous latches. The intermediate latches are clocked with selected phases of an M-phase clock having M equally-spaced phases of a clock signal having a frequency of B/M (where B is the outgoing bit rate) to latch each bit at a time at least 2/B (i.e., two outgoing bit periods) after such bit is received from its respective input latch. A first stage of 2:1 multiplexors, following the intermediate latches and used to begin multiplexing the latched bits, are clocked with selected phases of the M-phase clock to begin multiplexing each bit at a time at least 1/B (i.e., one outgoing bit period) after such bit is received from its respective intermediate latch. Further stages of 2:1 multiplexors complete the multiplexing and are each clocked with clock signals which are successively doubled in frequency at each additional stage of 2:1 multiplexors (e.g., 2B/M, 4B/M, 8B/M, . . . ) and phase compensated so as to align the clock signals with their respective data. The phase-compensated, frequency doubling for each 2:1 multiplexor stage is done by "exclusive-ORing" pairs of quadrature clock signals from the immediately preceding 2:1 multiplexor stage.
摘要:
A intelligent backhaul radio is disclosed that is compact, light and low power for street level mounting, operates at 100 Mb/s or higher at ranges of 300 m or longer in obstructed LOS conditions with low latencies of 5 ms or less, can support PTP and PMP topologies, uses radio spectrum resources efficiently and does not require precise physical antenna alignment.