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: Disclosed are methods for time-of-flight (TOF) ranging between wireless devices using single-sided two-way ranging (SS-TWR) and double-sided TWR (DS-TWR) exchanges. The SS-TWR method involves performing the exchange between the wireless devices and determining a first path angle, a relative carrier frequency offset of the initiator and responder devices, and response delay of the responder. The method also involves determining a single SS-TWR delay and calculating a TOF delta from the determined information. Finally, the method involves calculating the TOF using the TOF delta with the single SS-TWR delay. The DS-TWR method eliminates the need for the relative carrier frequency estimation. Both methods enable accurate ranging between wireless devices by considering first path angles, and delays delay, which can be used in a variety of applications such as localization and tracking of objects. The method can be implemented on a processor of one or more of the wireless devices.

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: A method for determining a channel impulse response (CIR) estimation in ultra-wideband (UWB) communication using a supercomplementary zero-sum correlation (SZC) sequence block is provided. The method includes, obtaining, from a memory, a basic sequence of N chips and having perfect periodic autocorrelation function (PACF), N being an odd number. The method also includes performing, by a shifting logic, a circular shift of the chips in the basic sequence by a shift number to obtain a shifted sequence, the shift number being a positive number less than N. The method also includes computing, by an inverting logic, an inversion parameter of the shifted sequence. The method also includes computing, by the inverting logic, a output sequence based on the shifted sequence and the inversion parameter; and receiving, by an antenna, a transmitted sequence. The method further includes performing, by a correlator circuit, cross-correlation between the output sequence and the received sequence.

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: Embodiments of an ultra-wideband (UWB) transceiver are disclosed. The UWB transceiver includes a transmitter and a receiver. The receiver has a first antenna and a second antenna. The first antenna and the second antenna are separated by a first distance, d. The receiver is configured to use the first antenna to receive the transmitted signal and use the second antenna to receive the transmitted signal, develop a range, r, between the transmitter and a selected one the first and second antennas, and develop a path difference value, p, develop an (x, y) location of the transmitter relative to the receiver as a function of d, r, and p.

Abstract: An ultra-wideband (“UWB”) communication system comprising a transmitter and a receiver having two antennas. An UWB signal transmitted by the transmitter is received at each of the antennas. By comparing the carrier phases of the received signals, the phase difference can be determined. From this phase difference and the known distance, d, between the 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 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: Systems and methods for channel estimation are disclosed. In one aspect, supercomplementary sets (SCSs) of sequences are defined and more optionally, but more particularly, supercomplementary zero-sum cross-correlation (SZC) sequence blocks are created from the SCSs and transmitted to a receiver. The receiver receives a signal that includes the SCSs or SZC sequence block(s) deformed by a channel frequency offset (CFO). The receiver may correlate the signal with the known SCS or SZC to create a signal with minimal or no side lobes from which the CFO may be removed and a channel estimate formed. Based on the channel estimate, a distance between transmitter and receiver may be determined and used for other purposes, such as the provision of location-based services.

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 and a receiver having two antennas. An UWB signal transmitted by the transmitter is received at each of the antennas. By comparing the carrier phases of the received signals, the phase difference can be determined. From this phase difference and the known distance, d, between the 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 and a receiver having two antennas. An UWB signal transmitted by the transmitter is received at each of the antennas. By comparing the carrier phases of the received signals, the phase difference can be determined. From this phase difference and the known distance, d, between the 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 antenna array (10) for detecting an incoming radio wave (52) having an operating wavelength, comprising: a plurality of antenna elements (12) arranged in an array with a periodic repetition of the antenna elements (12). Each antenna element (12) comprises a slot (32) being shaped such that the polarisation of the corresponding antenna element (12) is non-linear, and having a first axis (A1) and a second axis (A2) orthogonal to the first axis. Each of the first and second axes (A1; A2) has a length in the range of about 0.05-0.2 times the operating wavelength of the incoming radio wave (52) and the ratio of the length of the first axis A1 to the length of the second axis A2 is between about 1-2.5. There is also a method of configuring an antenna array 10 for detecting an incoming radio wave (52), and a method of determining the angle of arrival of a radio wave (52) impinging on such an antenna array (10).

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.