Discrete fourier transform-spread (DFT-S) based interlace physical uplink control channel (PUCCH) with user multiplexing
Wireless communications systems and methods related user multiplexing with discrete Fourier transform (DFT) precoded frequency interlaces are provided. A first wireless communication device identifies a first block-spreading code from a set of block-spreading codes associated with user multiplexing. The first wireless communication device communicates, with a second wireless communication device using a frequency interlace in a frequency spectrum, a first communication signal including a first block of information symbols spread across a set of resource blocks (RBs) within the frequency interlace based on the first block-spreading code. The first communication signal is generated by block-spreading the first block of information symbols based on the first block-spreading code to produce a first block of spread information symbols, performing a DFT on the first block of spread information symbols, and mapping the first block of spread information symbols to the set of RBs.
1 . A method of wireless communication performed at a first wireless communication device, comprising:
generating a first communication signal by:
block-spreading a first block of information symbols based on a first block-spreading code from a set of block-spreading codes associated with user multiplexing to generate a first block of spread information symbols;
performing a discrete Fourier transform (DFT) on the first block of spread information symbols to generate a frequency signal; and
mapping the frequency signal to a frequency interlace with ten resource blocks (RBs); and
communicating, with a second wireless communication device using the frequency interlace in a shared frequency spectrum, the first communication signal including the first block of information symbols spread across the ten RBs within the frequency interlace based on the first block-spreading code.
2 . The method of claim 1 , wherein non-zero values of the frequency signal are located at a first set of subcarriers.
3 . The method of claim 2 , wherein the first block of information symbols is carried by the first set of subcarriers interlaced with a second set of subcarriers in the ten RBs.
4 . The method of claim 1 , wherein the set of block-spreading codes includes orthogonal cover codes (OCCs).
5 . The method of claim 1 , wherein the set of block-spreading codes includes a discrete Fourier transform (DFT) sequence.
6 . The method of claim 1 , wherein the first block-spreading code is an orthogonal cover code (OCC) including at least a first code symbol and a second code symbol, and wherein the block-spreading the first block of information symbols includes:
applying the first code symbol to the first block of information symbols to generate a first block of coded information symbols;
applying the second code symbol to the first block of information symbols to generate a second block of coded information symbols; and
generating the first block of spread information symbols based on at least the first block of coded information symbols and the second block of coded information symbols.
7 . The method of claim 6 , wherein the generating the first block of spread information symbols includes: concatenating the first block of coded information symbols with the second block of coded information symbols.
8 . The method of claim 1 , wherein the communicating includes: communicating, with the second wireless communication device, a single carrier frequency division multiplexing (SC-FDM) waveform signal carrying the first block of spread information symbols.
9 . The method of claim 1 , wherein: the communicating the first communication signal includes:
receiving, from the second wireless communication device, the first communication signal based on the first block-spreading code; and
the method further comprises:
identifying a second block-spreading code from the set of block-spreading codes; and
receiving, from a third wireless communication device different from the second wireless communication device, a second communication signal concurrent with the first communication signal, the second communication signal including a second block of information symbols spread across the frequency interlace based on the second block-spreading code, the second block of information symbols carried by a second set of subcarriers in the ten RBs.
10 . The method of claim 1 , wherein the communicating is further based on a time-domain spreading code.
11 . The method of claim 1 , further comprising: applying a code-hopping pattern to the set of block-spreading codes.
12 . The method of claim 11 , wherein the communicating is not based on a time-domain spreading code.
13 . The method of claim 1 , wherein the first block of information symbols comprise modulation symbols including uplink control channel information.
14 . A first wireless communication device comprising:
one or more memories; and
one or more processors coupled to the one or more memories, the one or more memories storing instructions that are executable by the one or more processors, configured individually or in any combination, to cause the first wireless communication device to:
generate a first communication signal by:
block-spreading a first block of information symbols based on a first block-spreading code from a set of block-spreading codes associated with user multiplexing to generate a first block of spread information symbols;
performing a discrete Fourier transform (DFT) on the first block of spread information symbols to generate a frequency signal; and mapping the frequency signal to a frequency interlace with resource blocks (RBs); and
communicate, with a second wireless communication device using the frequency interlace in a shared frequency spectrum, the first communication signal including the first block of information symbols spread across ten RBs within the frequency interlace based on the first block-spreading code.
15 . The first wireless communication device of claim 14 , wherein non-zero values of the frequency signal are located at a first set of subcarriers.
16 . The first wireless communication device of claim 15 , wherein the first block of information symbols is carried by the first set of subcarriers interlaced with a second set of subcarriers in the ten RBs.
17 . The first wireless communication device of claim 14 , wherein the set of block-spreading codes includes orthogonal cover codes (OCCs).
18 . The first wireless communication device of claim 14 , wherein the first block-spreading code is an orthogonal cover code (OCC) including at least a first code symbol and a second code symbol, and wherein the one or more processors are further configured, individually or in any combination, to block-spread the first block of information symbols by:
applying the first code symbol to the first block of information symbols to generate a first block of coded information symbols;
applying the second code symbol to the first block of information symbols to generate a second block of coded information symbols; and
generating the first block of spread information symbols based on at least the first block of coded information symbols and the second block of coded information symbols.
19 . The first wireless communication device of claim 14 , wherein the one or more processors are further configured, individually or in any combination, to cause the first wireless communication device to: receive, from the second wireless communication device, the first communication signal based on the first block-spreading code;
identify a second block-spreading code from the set of block-spreading codes; and
communicate, with a third wireless communication device different from the second wireless communication device, a second communication signal concurrent with the first communication signal, the second communication signal including a second block of information symbols spread across the frequency interlace based on the second block-spreading code, the second block of information symbols carried by the second set of subcarriers.
20 . The first wireless communication device of claim 14 , wherein the first communication signal is further communicated based on a time-domain spreading code.
21 . The first wireless communication device of claim 14 , wherein the one or more processors are further configured, individually or in any combination, to: apply a code-hopping pattern to the set of block-spreading codes.
22 . The first wireless communication device of claim 21 , wherein the one or more processors are further configured, individually or in any combination, to cause the first wireless communication device to receive the first communication signal not based on a time-domain spreading code.
23 . The first wireless communication device of claim 14 , wherein the first block of information symbols comprises modulation symbols including uplink control channel information.