MC-CDMA WITH LOW PEAK-TO-AVERAGE POWER RATIO MULTI-CARRIER WAVEFORM
FIG2 is a block diagram of a user device according to an embodiment of the present disclosure
FIG2 shows one embodiment of a user device 102 for implementing the methods and modules described herein. The device 102 may include a processor 202, a memory 204, a power source 206 and a wireless communications interface 208 for sending and receiving data in the communications network 100, which components may or may not be arranged as shown in FIG2. The wireless communications interface 208 includes a transmitter 210 and a receiver 212 coupled to an antenna 214. It will be appreciated that the functions of the wireless communications interface 208 may be carried out by different transceiver or modem components including multiple transmitter, receiver, digital signal processor (DSP) and antenna components or arrays. In one embodiment, the user device 102 includes a user interface 220 and various inputs/outputs (I/O) 222 such as a display, audio input, audio output, keypads, buttons, microphones or other inputs or outputs. The memory 204 may store programming and/or instructions for the processor 202 including instructions for sending, receiving, processing and supporting different services and types of data, such as but not limited to video, VoIP calls, web browsing data, email and other text communications.
block diagram
210
transmitter
214
antenna
202
processor
18
spreading sequences.Optional Embodiment
220
user interface
208
communications interface
206
power source
204
memory
102
devices device
212
receiver
['1. A method for operating a device in a wireless network, the method comprising: spreading data with a spreading sequence, using discrete Fourier transform-spread orthogonal division multiplexing, DFT-S-OFDM, to generate multi-carrier spread data on subcarriers corresponding to non-zero subcarrier elements of the spreading sequence, the spreading sequence having sparsity of non-zero subcarrier elements and an equal spacing between adjacent non-zero subcarrier elements; and transmitting the multi-carrier spread data, wherein the spreading sequence is selected from a plurality of spreading sequences, each spreading sequence of the plurality having a respective equal spacing between adjacent non-zero subcarrier elements, the spreading sequences of the plurality differing from one another in at least one of: sparsity level in the frequency domain; sparsity pattern in the frequency domain; and pulse offset in the time domain.', '9. A transmitter device comprising: a spreader configured to spread data with a spreading sequence, using discrete Fourier transform-spread orthogonal division multiplexing, DFT-S-OFDM, to generate multi-carrier spread data on subcarriers corresponding to non-zero subcarrier elements of the spreading sequence, the spreading sequence having sparsity of non-zero subcarrier elements and an equal spacing between adjacent non-zero subcarrier elements; and a transmitter configured to transmit the multi-carrier spread data, wherein the spreading sequence is selected from a plurality of spreading sequences, each spreading sequence of the plurality having a respective equal spacing between adjacent non-zero subcarrier elements, the spreading sequences of the plurality differing from one another in at least one of: sparsity level in the frequency domain; sparsity pattern in the frequency domain; and pulse offset in the time domain.']