Abstract: A phasor-based signal detector includes a signal processor to detect symbols in a received signal in the presence of an offset between the carrier frequency and an oscillator frequency of the signal processor. The signal processor calculates a phasor that indicates a phase difference between a first sample in a first symbol group and a second sample in a second symbol group. The first and second samples each include a real part and an imaginary part corresponding to a same sample position within the first and second symbol groups. Calculating the phasor includes a complex multiplication of one of the samples and a conjugate of the other one of the samples. A phase difference indicated by a phasor meeting a criteria may be used to estimate a carrier frequency offset (CFO). If the CFO is within a supported range, the signal processor may coherently accumulate symbols.

Abstract: A method for use in a wireless communication system comprising a transmitter and a receiver, the method comprising receiving, in the receiver, data comprising a plurality of channel-distorted synchronization codes and plurality of channel-distorted cipher codes, generating a receiver cipher sequence, the receiver cipher sequence comprising a plurality of receiver cipher codes, analyzing the received data to identify correlations between the plurality of channel-distorted cipher codes in the received data and the plurality of receiver cipher codes, accumulating the identified correlations as accumulator data in an accumulator, identifying one or more peaks in the accumulator data, identifying a first correlation peak in the accumulator data that meets one or more criteria and using the first correlation peak to identify the first path of a data packet from the transmitter.

Abstract: A method for use in a wireless communication system comprising a transmitter and a receiver, the method comprising receiving, in the receiver, data comprising a plurality of channel-distorted synchronization codes and plurality of channel-distorted cipher codes, generating a receiver cipher sequence at the receiver, the receiver cipher sequence comprising a plurality of receiver cipher codes, analysing the received data to identify correlations between the plurality of channel-distorted cipher codes in the received data and the plurality of receiver cipher codes, accumulating the identified correlations as accumulator data in an accumulator, identifying one or more peaks in the accumulator data, identifying a first correlation peak in the accumulator data that meets one or more criteria and using the first correlation peak to identify the first path of a data packet from the transmitter.

Abstract: Embodiments of a device for wireless communication are disclosed. In some embodiments, the device includes: a transceiver configured to receive a message from a second device and at least one processor. The processor is communicatively coupled to the transceiver and is configured to: generate a response message includes a SYNC portion, a start frame delimiter (SFD) portion, and a cipher portion. The SYNC portion includes a sequence of symbols forming a preamble. The cipher portion includes a ciphered sequence of pseudo-randomized pulses. The transceiver is further configured to transmit the response message.

Abstract: An ultra-wideband (UWB) communication system comprising a transmitter having two antennas and a receiver having a single receive antenna. Respective selected portions of the UWB signal are transmitted by the transmitter via each of the two transmit antennas and are received at the receive antenna. By comparing the phases of the received signal portions, the phase difference of departure can be determined. From this phase difference the known distance, d, between the transmit antennas the Cartesian (x, y) location of the transmitter relative to the receiver can be directly determined.

Abstract: Systems and methods for reduced interpath interference for ultrawideband (UWB) wireless communication are disclosed. In one aspect, a wireless communication device employs a systematic and non-random pulse-hopping scheme to introduce variable distances between pulses to reduce collision rates from interpath interference. In exemplary aspects, the scheme optimizes avoidance of collision rates for distances between paths of up to thirty nanoseconds (30 ns). The use of an optimized grid will be stable regardless of position of the user, thereby avoiding transmission drops and improving the user experience.

Abstract: In an ultra-wideband (“UWB”) communication system, methods are disclosed for transmitting packets in multiple portions, each having a different pulse repetition frequency (“PRF”). Methods are also disclosed for transmitting packets discontinuously.

Abstract: In an ultra-wideband (“UWB”) communication system, methods are disclosed for transmitting packets in multiple portions, each having a different pulse repetition frequency (“PRF”). Methods are also disclosed for transmitting packets dis-continuously.

Abstract: A method of transmitting signals from a first node having multiple transceivers to a second node is disclosed. The method comprises receiving a message from the second node at the first node, wherein the message is received by each of a plurality of transceivers of the first node; and transmitting by each of the plurality of transceivers a respective data frame to the second node in response to the message; wherein each transceiver initiates the transmission of its respective data frame a predetermined time period after receipt of the message by the transceiver; and wherein the transmissions of the data frames from the plurality of transceivers overlap. The data frames may form part of a two-way ranging exchange.

Abstract: A method of transmitting signals from a first node having multiple transceivers to a second node is disclosed. The method comprises receiving a message from the second node at the first node, wherein the message is received by each of a plurality of transceivers of the first node; and transmitting by each of the plurality of transceivers a respective data frame to the second node in response to the message; wherein each transceiver initiates the transmission of its respective data frame a predetermined time period after receipt of the message by the transceiver; and wherein the transmissions of the data frames from the plurality of transceivers overlap. The data frames may form part of a two-way ranging exchange.

Abstract: An ultra-wideband (“UWB”) communication system comprising a transmitter having two transmit antennas and a receiver having a single receive antenna. Respective selected portions of the UWB signal are transmitted by the transmitter via each of transmit antennas is received at the receive antenna. By comparing the phases of the received signal portions, the phase difference of departure can be determined. From this phase difference and the known distance, d, between the transmit antennas, the Cartesian (x, y) location of the transmitter relative to the receiver can be directly determined.

Abstract: An ultra-wideband (“UWB”) communication system comprising a transmitter having two transmit antennas and a receiver having a single receive antenna. Respective selected portions of the UWB signal are transmitted by the transmitter via each of transmit antennas is received at the receive antenna. By comparing the phases of the received signal portions, the phase difference of departure can be determined. From this phase difference and the known distance, d, between the transmit antennas, the Cartesian (x,y) location of the transmitter relative to the receiver can be directly determined.

Abstract: A method for use in a wireless communication system comprising a transmitter and a receiver, the method comprising receiving, in the receiver, data comprising a plurality of channel-distorted synchronization codes and plurality of channel-distorted cipher codes, generating a receiver cipher sequence at the receiver, the receiver cipher sequence comprising a plurality of receiver cipher codes, analysing the received data to identify correlations between the plurality of channel-distorted cipher codes in the received data and the plurality of receiver cipher codes, accumulating the identified correlations as accumulator data in an accumulator, identifying one or more peaks in the accumulator data, identifying a first correlation peak in the accumulator data that meets one or more criteria and using the first correlation peak to identify the first path of a data packet from the transmitter.

Abstract: In an ultra-wideband (“UWB”) communication system, methods are disclosed for transmitting packets in multiple portions, each having a different pulse repetition frequency (“PRF”). Methods are also disclosed for transmitting packets dis-continuously.

Abstract: An ultra-wideband (“UWB”) communication system comprising a transmitter having two transmit antennas and a receiver having a single receive antenna. Respective selected portions of the UWB signal are transmitted by the transmitter via each of transmit antennas is received at the receive antenna. By comparing the phases of the received signal portions, the phase difference of departure can be determined. From this phase difference and the known distance, d, between the transmit antennas, the Cartesian (x,y) location of the transmitter relative to the receiver can be directly determined.

Abstract: An ultra-wideband (“UWB”) communication system comprising a transmitter having two transmit antennas and a receiver having a single receive antenna. Respective selected portions of the UWB signal are transmitted by the transmitter via each of transmit antennas is received at the receive antenna. By comparing the phases of the received signal portions, the phase difference of departure can be determined. From this phase difference and the known distance, d, between the transmit antennas, the Cartesian (x, y) location of the transmitter relative to the receiver can be directly determined.

Abstract: An ultra-wideband (“UWB”) communication system comprising a transmitter having two transmit antennas and a receiver having a single receive antenna. Respective selected portions of the UWB signal are transmitted by the transmitter via each of transmit antennas is received at the receive antenna. By comparing the phases of the received signal portions, the phase difference of departure can be determined. From this phase difference and the known distance, d, between the transmit antennas, the Cartesian (x, y) location of the transmitter relative to the receiver can be directly determined.

Abstract: In an ultra-wideband (“UWB”) communication system, methods are disclosed for transmitting packets in multiple portions, each having a different pulse repetition frequency (“PRF”). Methods are also disclosed for transmitting packets dis-continuously.

Abstract: A method of transmitting signals from a first node having multiple transceivers to a second node is disclosed. The method comprises receiving a message from the second node at the first node, wherein the message is received by each of a plurality of transceivers of the first node; and transmitting by each of the plurality of transceivers a respective data frame to the second node in response to the message; wherein each transceiver initiates the transmission of its respective data frame a predetermined time period after receipt of the message by the transceiver; and wherein the transmissions of the data frames from the plurality of transceivers overlap. The data frames may form part of a two-way ranging exchange.

Abstract: In an ultra-wideband (“UWB”) communication system, methods are disclosed for transmitting packets in multiple portions, each having a different pulse repetition frequency (“PRF”). Methods are also disclosed for transmitting packets dis-continuously.