An interference alignment (AI) method for an uplink in a wireless local area network (WLAN) system, an access point (AP) and a user terminal for performing the same, and the AP that may select an interference space, broadcast information on the selected interference space, select a user terminal to be assigned a data transmission opportunity based on leakage of interference (LIF) information received from at least one user terminal, receive data from the user terminal, and decode the data using a minimum square error (MMSE) based receiving filter.

A method and a transmitter for transmitting a pay load sequence are provided. The transmitter includes a ternary sequence mapper configured to map a binary data sequence to a ternary sequence stored in the transmitter, and a pulse shaping filter configured to generate a first signal based on the mapped ternary sequence. The ternary sequence includes elements of 1, 0, and 1

The invention relates to the field of equalizer technology, more specifically, to a signal decision device and a signal decision method. By calculating an error for the hard decision signal, and then implementing a condition decision via the threshold condition, the invention decides to output the equalization time domain signal or the hard decision signal, and reduces the error of the output signal. The above technical solution improves the performance of the equalizer by implementing the iteratively update directly via soft bit information instead of the hard decision signal.

The present invention describes a method and system for simultaneous transmission of data to coherent and non-coherent receivers. The method at the transmitter includes retrieving a base ternary sequence having a pre-defined length, obtaining one or more ternary sequences corresponding to data to be transmitted and transmitting the obtained one or more ternary sequences by the transmitter. The method steps at the receiver includes receiving one or more ternary sequences corresponding to the data transmitted, demodulating each of the received ternary sequences by correlating with all cyclic shifts of the base ternary sequence by the receiver if the receiver is a coherent receiver, demodulating each of the received ternary sequences by correlating with all cyclic shifts of the absolute of the base ternary sequence by the receiver if the receiver is a non-coherent receiver and detecting the transmitted data based on the cyclic shifts corresponding to maximum correlation values.

A method and a transmitter for transmitting a pay load sequence are provided. The transmitter includes a ternary sequence mapper configured to map a binary data sequence to a ternary sequence stored in the transmitter, and a pulse shaping filter configured to generate a first signal based on the mapped ternary sequence. The ternary sequence includes elements of 1, 0, and 1.

The present invention describes a method and system for simultaneous transmission of data to coherent and non-coherent receivers. The method at the transmitter includes retrieving a base ternary sequence having a pre-defined length, obtaining one or more ternary sequences corresponding to data to be transmitted and transmitting the obtained one or more ternary sequences by the transmitter. The method steps at the receiver includes receiving one or more ternary sequences corresponding to the data transmitted, demodulating each of the received ternary sequences by correlating with all cyclic shifts of the base ternary sequence by the receiver if the receiver is a coherent receiver, demodulating each of the received ternary sequences by correlating with all cyclic shifts of the absolute of the base ternary sequence by the receiver if the receiver is a non-coherent receiver and detecting the transmitted data based on the cyclic shifts corresponding to maximum correlation values.

The present invention relates to a method and a device for transmitting a pay load sequence, and provides in one embodiment a transmitter comprising a first signal converter for converting a ternary payload sequence composed of elements 1, 0, or 1 into a first signal, wherein the first signal converter comprises: a ternary sequence mapper for generating the ternary payload sequence by mapping a pre-designed sequence into a binary data sequence; and a converter for converting the ternary payload sequence into the first signal.

In one embodiment, a method includes accessing a modulated symbol sequence comprising multiple symbols, generating interpolated symbols to be added between any two adjacent symbols based on an unequal phase change method, generating an interpolated symbol sequence based on adding the generated interpolated symbols for any two adjacent symbols into the two adjacent symbols, and transmitting a waveform to a wireless endpoint device, wherein the waveform is generated based on the interpolated symbol sequence.

In one embodiment, a method includes accessing a modulated symbol sequence comprising multiple symbols, generating interpolated symbols to be added between any two adjacent symbols based on an unequal phase change method, generating an interpolated symbol sequence based on adding the generated interpolated symbols for any two adjacent symbols into the two adjacent symbols, and transmitting a waveform to a wireless endpoint device, wherein the waveform is generated based on the interpolated symbol sequence.