Abstract: A method for communicating comprises generating at least one generalized Golay code from a concatenation of constituent Golay codes, and spreading at least a portion of a data stream with the at least one generalized Golay code. Generalized Golay codes comprise pseudo-complementary sequences having code lengths that differ from Golay complementary sequences and are characterized by low autocorrelation sidelobes relative to the autocorrelation peak.

Abstract: Certain aspects of the present disclosure relate to a method for acquisition of a received spread spectrum signal transmitted over a wired or wireless medium.

Abstract: Certain aspects of the present disclosure relate to a method for modulating single carrier signals using constant envelope 2-CPM modulation and quasi-constant envelope filtered continuously rotated pseudo-PSK modulation in a wireless communication system.

Abstract: A method of communication includes allocating a portion of a superframe centralized contention based period where the access method is based on directional ALOHA. The centralized contention based period is divided into equal time slots, and each sequential set of N time slots forms a time cycle. During a time cycle, a wireless device listens for requests from other wireless devices while it changes its receiving direction from one time slot to another.

Abstract: A communication method comprises generating a Golay code having a zero-DC level when differentially encoded and continuously rotated. A preamble of a data stream is spread with the Golay code, and the data stream is modulated with continuous phase modulation (CPM), such as constant envelope 2-CPM, before being transmitted. A method for acquiring a received signal having a spread sync field modulated with 2-CPM comprises performing chip-level differential detection of the received signal, correlating the received signal with a Golay sequence; and accumulating the correlator outputs.

Abstract: Certain aspects of the present disclosure relate to a method for acquisition of a received spread spectrum signal transmitted over a wired or wireless medium.

Abstract: A method of communication comprises partitioning a single-carrier data stream into equal-size blocks, and partitioning each block into a plurality of equal-size sub-blocks. A first set of cyclic prefixes and/or postfixes is inserted into the blocks to allow a linear convolution of a frequency-selective multipath channel having a long delay spread to be modeled as a circular convolution at a receiver. A second set of cyclic prefixes and/or postfixes is inserted into the sub-blocks to allow a linear convolution of a frequency-selective multipath channel having a short delay spread to be modeled as a circular convolution at the receiver. Upon receiving a transmitted data frame from the multipath channel, the receiver measures a link quality index (LQI) of a short channel impulse response; and selects block-by-block equalization or sub-block by sub-block equalization based on the LQI.

Abstract: A medical sensor system comprises a gateway comprising a wideband receiver and a narrow band transmitter, the each gateway configured to receive a wideband positioning frame using the wideband receiver from one or more wearable sensors and to transmit acknowledgement frames using the narrow band transmitter that include timing and control data for use by the sensors to establish timing for transmission of the positioning frame; and at least one wearable sensor comprising a wideband transmitter and a narrow band receiver, the sensor configured to transmit a sensor data frame to the gateway using the wideband transmitter and to receive an acknowledgement frame from the gateway using the narrow band receiver, extract timing and control information from the frame, and adjust the timing and synchronization of the wideband transmitter using the timing and control information.

Abstract: In a millimeter-wave radar, full-duplex operation comprises identifying a leakage signal in a digital baseband received signal, estimating the leakage signal, synthesizing an estimated leakage signal, and subtracting the estimated leakage signal from the digital baseband received signal. The time interval during which the leakage signal occurs may be measured, and samples of the digital baseband received signal within the time interval are masked to remove the leakage.

Abstract: A medical sensor system comprises a gateway comprising a wideband receiver and a narrow band transmitter, the each gateway configured to receive a wideband positioning frame using the wideband receiver from one or more wearable sensors and to transmit acknowledgement frames using the narrow band transmitter that include timing and control data for use by the sensors to establish timing for transmission of the positioning frame; and at least one wearable sensor comprising a wideband transmitter and a narrow band receiver, the sensor configured to transmit a sensor data frame to the gateway using the wideband transmitter and to receive an acknowledgement frame from the gateway using the narrow band receiver, extract timing and control information from the frame, and adjust the timing and synchronization of the wideband transmitter using the timing and control information.

Abstract: A method for communicating comprises generating at least one spreading code from a preferred Golay generator and/or a preferred generalized Golay generator. The preferred generalized Golay generator may comprise a plurality of preferred Golay generators. The outputs of the preferred Golay generator are logic 0 and 1. Each stage of the preferred Golay generator may comprise a single basic storage unit, such as a Flip-Flop. Generalized Golay codes comprise pseudo-complementary sequences having code lengths that differ from Golay complementary sequences and are characterized by low autocorrelation sidelobes relative to the autocorrelation peak.

Abstract: A positioning system comprises a plurality of controllers, each controller comprising a wideband receiver and a narrow band transmitter, the each controller configured to receive a wideband positioning frame using the wideband receiver from one or more devices and to transmit acknowledgement frames using the narrow band transmitter that include timing and control data for use by the devices to establish timing for transmission of the positioning frame; and at least one device comprising a wideband transmitter and a narrow band receiver, the device configured to transmit a positioning frame to the plurality of controllers using the wideband transmitter and to receive an acknowledgement frame from one or more controllers using the narrow band receiver, extract timing and control information from the frame, and adjust the timing and synchronization of the wideband transmitter using the timing and control information.

Abstract: Certain aspects of the present disclosure relate to a method for modulating single carrier signals using constant envelope 2-CPM modulation and quasi-constant envelope filtered continuously rotated pseudo-PSK modulation in a wireless communication system.

Abstract: Certain aspects of the present disclosure relate to a method for demodulating CPM modulated signals transmitted in a wired or wireless communication system using a linear modulation model consisting of a linear superposition of time pulses modulated using pseudo-PSK pulses.

Abstract: Certain aspects of the present disclosure relate to a method for acquisition of a received spread spectrum signal transmitted over a wired or wireless medium.

Abstract: Certain aspects of the present disclosure relate to a method for generating a single rate or multi-rate highly structured low density parity check, encoding a data stream with the generated LDPC matrix for transmission in a wireless communication system, and for efficient LDPC decoding at a receiver.

Abstract: Certain aspects of the present disclosure relate to a method for modulating single carrier signals using constant envelope 2-CPM modulation and quasi-constant envelope filtered continuously rotated pseudo-PSK modulation in a wireless communication system.

Abstract: Provided is a method for generating a single rate or multi-rate highly structured low density parity check, encoding a data stream with the generated LDPC matrix for transmission in a wireless communication system, and for efficient LDPC decoding at a receiver.