A wireless transceiver for use with a CDMA communication system is disclosed. The wireless transceiver comprises: a first sequence generator to provide a first sequence of values during a period, wherein the first sequence generator provides the first sequence of values repeatedly; a second sequence generator to provide a second sequence of values during the period and in alignment with the first sequence generator, wherein the second sequence generator provides the second sequence of values repeatedly; a first combiner to combine output signals of the first sequence generator and the second sequence generator to provide a third sequence of values during the period, wherein the first combiner provides the third sequence of values repeatedly; and a second combiner to combine an output signal from the first combiner with an input signal containing information; a radio front end to transmit an output signal from the second combiner to an antenna.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a network controller may determine a first set of spreading sequences and a second set of spreading sequences for non-orthogonal multiple access (NOMA) communication, wherein the first set of spreading sequences is different than the second set of spreading sequences; and configure a first cell to use the first set of spreading sequences and a second cell to use the second set of spreading sequences; or configure the first set of spreading sequences to be used for first user equipment associated with a cell center of the first cell and the second set of spreading sequences to be used for second user equipment associated with a cell edge of the first cell or the second cell. Numerous other aspects are provided.

Data transmissions are scheduled from internet of things (IoT) user equipment (UEs) to a base station (BS) that serves those IoT UEs in a cellular network. A BS may broadcast synchronization information to the IoT UEs that allows the BS to calculate and use a schedule for receiving data transmissions from the UEs. This information can include a total number of the IoT UEs being serviced, a length of a spreading code to use in the schedule, a time domain periodicity of available resources, and a maximum number of the IoT UEs that can send data to the BS at one time. Each IoT UE can independently apply a mathematical operation to the broadcast information it receives to calculate and use the schedule. The BS can receive the data transmissions from each of the IoT UEs according to that schedule.

A communications protocol in accordance with one exemplary embodiment uses information from GPS satellites to synchronize the phases of transmitters, and aligns the phase with a spreading code used to de-spread the received signals at, for example, a ground station.

A communications protocol in accordance with one exemplary embodiment uses information from GPS satellites to synchronize the phases of transmitters, and aligns the phase with a spreading code used to de-spread the received signals at, for example, a ground station.

A receiver for spread spectrum signals comprising a first part for preprocessing and digitizing a received signal, and a second part for tracking the digitized signal comprising a carrier loop and a code loop. The code loop comprises a generator for a reference receiver signal for correlation with the received signal and the code loop is configured to modify the reference signal to shape a correlation function between the received signal and the reference receiver signal. The first part is adapted to multiply the received spread spectrum signal with a first analog spectral offsetting signal provided for down-converting the received signal to an intermediate frequency and a sub-carrier frequency, selected from a set of sub-carrier frequencies, such that the received signal is down-converted and spectrally offset in the analog domain during a time interval covering at least one chip of a spreading code of the received signal.

Some embodiments of the present invention provide a touch detection method and system. The touch detection method comprises: performing a spread spectrum process on a driving signal to generate a spectrum-spread signal; outputting the spectrum-spread signal to a driving terminal of a touch screen; receiving, from a response terminal of the touch screen, a coupled signal formed by coupling the spectrum-spread signal received by the driving terminal to the response terminal; and performing a de-spread spectrum process on the coupled signal to obtain a touch detection signal. Employing the embodiments of the present invention, an accuracy of a detection of a location on the touch screen can be improved by a spread spectrum technology, so as to enhance an anti-interference ability of a touch-controlled device.

A spreading sequence generator for a first radio frequency (RF) transceiver receives an RF signal from a second RF transceiver. The first RF transceiver measures power levels of the received RF signal at a plurality of instants to generate respective digital power level values and uses the plurality of digital power level values to create a first spreading sequence. The second RF transceiver receives an RF signal from the first RF transceiver and performs the same functions to create a second spreading sequence. Due to the reciprocal nature of the RF channel between the first and second RF transceivers, the first and second cryptographic keys match.

An approach is described for a method for a base station in a fifth generation (5G) wireless c01mnunication or a new radio (NR) system that includes the following steps. The method includes determining base initial seeds and a time parameter. The method further includes generating actual initial seeds based on the base initial seeds and the time parameter; generating a Pseudo-Noise (PN) sequence based on one of the actual initial seeds; and generating a remote interference management reference signal (RIM-RS) sequence based on the PN sequence. The method further includes transmitting the RIM-RS sequence to a remote base station.

A method of determining a location of a requesting station includes: transmitting a configuration message to a plurality of responding stations to configure the responding stations to transmit, in response to a first spread spectrum signal, a plurality of second spread spectrum signals; wirelessly transmitting the first spread-spectrum signal; wirelessly receiving the second spread spectrum signals; determining time of flight (TOF)s based on the second spread spectrum signals; and determining, the location using the determined TOFs, wherein the second spread spectrum signals are orthogonal to each other.