Modified super-quadrature amplitude modulation (QAM) modulation schemes based on low order mother QAM
A method for wireless communication at a user equipment (UE) includes receiving, from a network node, a first message querying a capability of the UE to support a modified high order quadrature amplitude modulation (QAM) scheme associated with a first constellation having a first group of regions, each region of the first constellation comprising a respective second constellation associated with a low order QAM scheme. The method further includes receiving, from the network node, a transmission in accordance with the modified high order QAM scheme based on the UE indicating the capability of the UE to support the modified high order QAM scheme. The transmission conveying a group of symbols, each symbol indicating a first set of bits indicating a first region of the first group of regions, and a second set of encoded bits indicating a constellation point in a respective second constellation comprised in the first region.
1 . A method for wireless communication at a user equipment (UE), comprising:
receiving, from a network node, a first message querying a capability of the UE to decode transmissions modulated in accordance with a modified high order quadrature amplitude modulation (QAM) scheme associated with a first constellation having a first group of regions, each region of the first group of regions comprising a respective second constellation associated with a low order QAM scheme, each region of the first group of regions being separated from each adjacent region of the first group of regions by a gap that is larger than a spacing between adjacent constellation points in any one of the second constellations;
transmitting, to the network node, a second message indicating the capability of the UE to decode the transmissions modulated in accordance with the modified high order QAM scheme in accordance with receiving the first message; and
receiving, from the network node, a transmission in accordance with the modified high order QAM scheme, the transmission conveying a group of symbols, each symbol of the group of symbols indicating a respective group of bits that includes:
a first set of bits indicating a first region of the first group of regions associated with the modified high order QAM scheme, and
a second set of encoded bits indicating a constellation point in a respective second constellation comprised in the first region.
2 . The method of claim 1 , wherein, for the respective group of bits included in each symbol of the group of symbols, an amplitude and a phase associated with the second set of encoded bits indicates the constellation point in the respective second constellation.
3 . The method of claim 2 , further comprising, for the respective group of bits of each symbol of the group of symbols:
extracting, via a hard-slicing operation, the first set of bits; and
decoding the second set of encoded bits in accordance with the amplitude and the phase.
4 . The method of claim 3 , further comprising concatenating the first set of bits with the decoded second set of bits.
5 . The method of claim 1 , wherein the low order QAM scheme is a 1024 (1 k-) QAM scheme and each of the second constellations comprises four regions.
6 . The method of claim 5 , wherein:
the modified high order QAM scheme is a 4096 (4 k-) QAM scheme;
a quantity of the first set of bits is two;
a quantity of the second set of encoded bits is ten; and
the first group of regions consists of four regions.
7 . The method of claim 5 , wherein:
the modified high order QAM scheme is a 16,384 (16 k-) QAM scheme;
a quantity of the first set of bits is four;
a quantity of the second set of encoded bits is ten; and
the first group of regions consists of sixteen regions.
8 . The method of claim 1 , wherein the first message and the second message are medium access control (MAC) control element (CE) (MAC-CE) messages.
9 . A user equipment (UE), comprising:
one or more processors; and
one or more memories coupled with the one or more processors and storing processor-executable code that, when executed by the one or more processors, is configured to cause the UE to:
receive, from a network node, a first message querying a capability of the UE to decode transmissions modulated in accordance with a modified high order quadrature amplitude modulation (QAM) scheme associated with a first constellation having a first group of regions, each region of the first group of regions comprising a respective second constellation associated with a low order QAM scheme, each region of the first group of regions being separated from each adjacent region of the first group of regions by a gap that is larger than a spacing between adjacent constellation points in any one of the second constellations;
transmit, to the network node, a second message indicating the capability of the UE to decode the transmissions modulated in accordance with the modified high order QAM scheme in accordance with receiving the first message; and
receive, from the network node, a transmission in accordance with the modified high order QAM scheme, the transmission conveying a group of symbols, each symbol of the group of symbols indicating a respective group of bits that includes:
a first set of bits indicating a first region of the first group of regions associated with the modified high order QAM scheme, and
a second set of encoded bits indicating a constellation point in a respective second constellation comprised in the first region.
10 . The UE of claim 9 , wherein, for the respective group of bits included in each symbol of the group of symbols, an amplitude and a phase associated with the second set of encoded bits indicates the constellation point in the respective second constellation.
11 . The UE of claim 10 , wherein execution of the processor-executable code further causes the UE to, for the respective group of bits of each symbol of the group of symbols:
extract, via a hard-slicing operation, the first set of bits; and
decode the second set of encoded bits in accordance with the amplitude and the phase.
12 . The UE of claim 11 , wherein execution of the processor-executable code further causes the UE to concatenate the first set of bits with the decoded second set of bits.
13 . The UE of claim 9 , wherein the low order QAM scheme is a 1024 (1 k-) QAM scheme and each of the second constellations comprises four regions.
14 . The UE of claim 13 , wherein:
the modified high order QAM scheme is a 4096 (4 k-) QAM scheme;
a quantity of the first set of bits is two;
a quantity of the second set of encoded bits is ten; and
the first group of regions consists of four regions.
15 . The UE of claim 13 , wherein:
the modified high order QAM scheme is a 16,384 (16 k-) QAM scheme;
a quantity of the first set of bits is four;
a quantity of the second set of encoded bits is ten; and
the first group of regions consists of sixteen regions.
16 . The UE of claim 9 , wherein the first message and the second message are medium access control (MAC) control element (CE) (MAC-CE) messages.
17 . A method for wireless communication at a network node, comprising:
transmitting a first message querying a capability of a user equipment (UE) to decode transmissions modulated in accordance with a modified high order quadrature amplitude modulation (QAM) scheme associated with a first constellation having a first group of regions, each region of the first group of regions comprising a respective second constellation associated with a low order QAM scheme, each region of the first group of regions being separated from each adjacent region of the first group of regions by a gap that is larger than a spacing between adjacent constellation points in any one of the second constellations;
receiving, from the UE, a second message indicating the capability of the UE to decode the transmissions modulated in accordance with the modified high order QAM scheme in accordance with receiving the first message; and
transmitting a transmission in accordance with the modified high order QAM scheme, the transmission conveying a group of symbols, each symbol of the group of symbols indicating a respective group of bits that includes:
a first set of bits indicating a first region of the first group of regions associated with the modified high order QAM scheme, and
a second set of encoded bits indicating a constellation point in a respective second constellation comprised in the first region.
18 . The method of claim 17 , wherein, for the respective group of bits included in each symbol of the group of symbols, an amplitude and a phase associated with the second set of encoded bits indicates the constellation point in the respective second constellation.
19 . The method of claim 17 , wherein the low order QAM scheme is a 1024 (1 k-) QAM scheme and each of the second constellations comprises four regions.
20 . The method of claim 19 , wherein:
the modified high order QAM scheme is a 4096 (4 k-) QAM scheme;
a quantity of the first set of bits is two;
a quantity of the second set of encoded bits is ten; and
the first group of regions consists of four regions.
21 . The method of claim 19 , wherein:
the modified high order QAM scheme is a 16,384 (16 k-) QAM scheme;
a quantity of the first set of bits is four;
a quantity of the second set of encoded bits is ten; and
the first group of regions consists of sixteen regions.
22 . The method of claim 17 , wherein the first message and the second message are medium access control (MAC) control element (CE) (MAC-CE) messages.
23 . A network node, comprising:
one or more processors; and
one or more memories coupled with the one or more processors and storing processor-executable code that, when executed by the one or more processors, is configured to cause the network node to:
transmit a first message querying a capability of a user equipment (UE) to decode transmissions modulated in accordance with a modified high order quadrature amplitude modulation (QAM) scheme associated with a first constellation having a first group of regions, each region of the first group of regions comprising a respective second constellation associated with a low order QAM scheme, each region of the first group of regions being separated from each adjacent region of the first group of regions by a gap that is larger than a spacing between adjacent constellation points in any one of the second constellations;
receive, from the UE, a second message indicating the capability of the UE to decode the transmissions modulated in accordance with the modified high order QAM scheme in accordance with receiving the first message; and
transmit a transmission in accordance with the modified high order QAM scheme, the transmission conveying a group of symbols, each symbol of the group of symbols indicating a respective group of bits that includes:
a first set of bits indicating a first region of the first group of regions associated with the modified high order QAM scheme, and
a second set of encoded bits indicating a constellation point in a respective second constellation comprised in the first region.
24 . The network node of claim 23 , wherein, for the respective group of bits included in each symbol of the group of symbols, an amplitude and a phase associated with the second set of encoded bits indicates the constellation point in the respective second constellation.
25 . The network node of claim 23 , wherein the low order QAM scheme is a 1024 (1 k-) QAM scheme and each of the second constellations comprises four regions.
26 . The network node of claim 25 , wherein:
the modified high order QAM scheme is a 4096 (4 k-) QAM scheme;
a quantity of the first set of bits is two;
a quantity of the second set of encoded bits is ten; and
the first group of regions consists of four regions.
27 . The network node of claim 25 , wherein:
the modified high order QAM scheme is a 16,384 (16 k-) QAM scheme;
a quantity of the first set of bits is four;
a quantity of the second set of encoded bits is ten; and
the first group of regions consists of sixteen regions.
28 . The network node of claim 23 , wherein the first message and the second message are medium access control (MAC) control element (CE) (MAC-CE) messages.