The present disclosure provides a method for controlling frequency hopping, a transmitter and a receiver, the method comprising: switching a synchronization frequency to any pre-configured synchronization frequency value when a time slot for sending a synchronization frame is reached, and sending the synchronization frame; after the previous synchronization frame is sent, switching the synchronization frequency from the previous pre-configured synchronization frequency value to any pre-configured synchronization frequency value, and sending the synchronization frame; after a total time slot for sending a synchronization frame is complete, switching a data frequency to any pre-configured data frequency value, and sending the data frame when the time slot for sending a data frame is reached; or, receiving a data frame when a time slot for receiving a data frame is reached; after the previous data frame is sent or received, and sending a data frame, switching the data frequency from a previous pre-configured data frequency value to any pre-configured frequency value; or, receiving the data frame. By applying the technical solution of the present disclosure, the operating state of a frequency hopping system may be accurately controlled, thereby improving the controllability of the frequency hopping system.

A receiver baseband processor and method for performing preamble detection and Time-of-Arrival, ToA, estimation for a single-tone frequency hopping random access preamble. The processor FFT processes a received signal and identifies logical tones. For each logical tone, the processor reads received symbols; determines a ToA estimate; forms a statistic based on the ToA estimate; compares the statistic to a preamble threshold; and when the statistic is greater than or equal to the threshold, determines a preamble is present and utilizes the ToA estimate for a timing advance command.

A system and method for transmitting a digital signal comprising includes a random number generator for generating a pseudorandom code. A scheduler stores a plurality of signal sequences each matching a set of bandwidth-time products and center frequencies with a stored code. The scheduler selects a signal sequence by matching the pseudorandom code with one of the stored codes. The scheduler selects a bandwidth-time product and center frequency based on the selected signal sequence. A baseband processing unit generates the digital signal based on a selected bandwidth-time product and center frequency. A front end processing and beamforming unit broadcasts the digital signal.

A method and system for enabling the determination of a position of a receiver within a space includes transmitting a beacon signal from each of a plurality of beacon devices located at different locations within the space. The beacon signal transmitted from each beacon device has a unique information component and may have a unique frequency pattern of multiple frequencies. Each beacon signal can be distinguishable from the beacon signals transmitted from any other of the beacon devices based on the combination of its unique information component and its unique frequency pattern. The beacon signals are received at a receiver. At the receiver, for each beacon signal of a working subset, time-delay information of the received beacon signal is determined and multilateration is applied to determine the position of the receiver based on the location of each beacon device of the working subset.

A wireless network with network-level channel hopping. A wireless network includes a wireless device. The wireless device includes a receiver, a data channel selector, and a transmitter. The receiver is configured to receive a beacon signal comprising a beacon sequence value. The data channel selector is configured to select, as a pseudorandom function of the beacon sequence value, a data channel on which to transmit in an interval following reception of the beacon signal. The transmitter is configured to transmit on the data channel selected by the channel selector.

There are provided a communication system, a communication apparatus, a communication method, a hopping pattern determining method, and a program for suitably setting a hopping pattern of frequencies for data communication. A hopping pattern data storing part stores hopping pattern data denoting the hopping pattern of frequencies for data communication. A frequency switching part switches the frequencies for data communication with a communication part in accordance with the hopping pattern. A reception part receives a signal transmitted at frequencies different from those of the hopping pattern over a period where data communication is not performed. A hopping pattern determining part determines a new hopping pattern on the basis of reception quality of the signal received by the communication part.

The invention relates to a method for the telecommunication of data by frequency hopping in a first frequency band, wherein the frequency hops follow a predetermined time sequence, known at least to a data transmitter, characterized in that it comprises the following steps implemented by said data transmitter: defining, from a pseudo-random sample, successive values of respective differences in frequency (fs1, fs2, fs3, . . . ; fd1, fd2, fd3, etc.) in order to determine the hopping time sequence starting at a first frequency (f1), transmitting to at least one data receiver at a first frequency (f1), said first frequency being randomly selected (S1) within the first frequency band, then at successive frequencies (S5) which, starting at the first frequency, comply with said successive values of respective differences in frequency, said successive values of differences in frequency defining, at reception, a succession of reception frequencies for useful data to be received from said data transmitter.

There are provided a communication system, a communication apparatus, a communication method, a hopping pattern determining method, and a program for suitably setting a hopping pattern of frequencies for data communication. A hopping pattern data storing part stores hopping pattern data denoting the hopping pattern of frequencies for data communication. A frequency switching part switches the frequencies for data communication with a communication part in accordance with the hopping pattern. A reception part receives a signal transmitted at frequencies different from those of the hopping pattern over a period where data communication is not performed. A hopping pattern determining part determines a new hopping pattern on the basis of reception quality of the signal received by the communication part.

An analysis method for multi-user random access signals is disclosed, which solves the connection problem between a base station and a user equipment when the narrow-band IoT uplink signal transmission is implemented. The analysis method of the present invention utilizes the detection threshold value to effectively determine multiple user equipment to be signaled; then, for each detected user equipment, an effective method based on the phase difference is used to estimate their synchronization parameters, i.e. time-of-arrival (ToA) and residual carrier frequency offset (RCFO). Therefore, according to the present invention, random access signals can be received correctly and efficiently and the user equipment related information can be obtained at the same time to facilitate subsequent communications.

A method and system for enabling the determination of a position of a receiver within a space includes transmitting a beacon signal from each of a plurality of beacon devices located at different locations within the space. The beacon signal transmitted from each beacon device has a unique information component and may have a unique frequency pattern of multiple frequencies. Each beacon signal can be distinguishable from the beacon signals transmitted from any other of the beacon devices based on the combination of its unique information component and its unique frequency pattern. The beacon signals are received at a receiver. At the receiver, for each beacon signal of a working subset, time-delay information of the received beacon signal is determined and multilateration is applied to determine the position of the receiver based on the location of each beacon device of the working subset.