Apparatus, system and method of communicating an EDMG PPDU
Some demonstrative embodiments include apparatuses, devices, systems and methods of communicating an Enhanced Directional Multi-Gigabit (DMG) (EDMG) Physical Layer Protocol Data Unit (PPDU). For example, an EDMG wireless communication station (STA) may be configured to communicate an EDMG PPDU including a Channel Estimation Field (CEF) and/or a pilot sequence, which may be configured for an OFDM mode.
1. An apparatus comprising logic and circuitry configured to cause an Enhanced Directional Multi-Gigabit (DMG) (EDMG) wireless communication station (STA) to:
generate at least one pilot sequence corresponding to at least one respective space-time stream for an EDMG Physical Layer (PHY) Protocol Data Unit (PPDU), the pilot sequence comprising a plurality of pilot values, a pilot value of the plurality of pilot values is based on a space-time stream number of the space-time stream, an Orthogonal Frequency Division Multiplexing (OFDM) symbol number, and a subcarrier index; and
transmit an OFDM mode transmission of the EDMG PPDU comprising the at least one pilot sequence.
2. The apparatus of claim 1 configured to cause the EDMG STA to determine the pilot value by applying a phase shift to a predefined pilot value, the phase shift is based on the space-time stream number and the OFDM symbol number, the predefined pilot value is based on the space-time stream number and the subcarrier index.
3. The apparatus of claim 2 , wherein the phase shift comprises a product of a deterministic shift and a random shift, the deterministic shift is based on the space-time stream number and the OFDM symbol number, the random shift is based on a scrambler output corresponding to the OFDM symbol number.
4. The apparatus of claim 3 , wherein the deterministic shift is repeated over time with a period equal to a total count of the at least one space-time stream.
5. The apparatus of claim 3 , wherein the deterministic shift, denoted W(i STS , n), is in accordance with the following definition:
W
(
i
S
T
S
,
n
)
=
exp
(
-
j
2
π
N
S
T
S
·
(
i
S
T
S
-
1
)
·
(
n
-
1
)
)
,
i
S
T
S
=
1
,
2
,
…
,
N
S
T
S
;
n
=
1
,
2
,
…
,
N
S
T
S
wherein n denotes the OFDM symbol number, i STS denotes the space-time stream number, and N STS denotes a total count of the at least one space-time stream.
6. The apparatus of claim 2 , wherein the phase shift comprises a common phase shift, which is common over subcarriers.
7. The apparatus of claim 2 configured to cause the EDMG STA to determine the predefined pilot value according to a predefined pilot sequence corresponding to the space-time stream number.
8. The apparatus of claim 7 , wherein the predefined pilot sequence corresponding to the space-time stream number is based on a count of one or more 2.16 Gigahertz (GHz) channels for transmission of the EDMG PPDU.
9. The apparatus of claim 8 , wherein the predefined pilot sequence corresponding to the space-time stream number comprises a predefined pilot sequence, denoted P 16 (i STS , :), comprising sixteen pilot values, when the count of the one or more 2.16 Gigahertz (GHz) channels is one.
10. The apparatus of claim 8 , wherein the predefined pilot sequence corresponding to the space-time stream number comprises a predefined pilot sequence, denoted P 36 (i STS , :), comprising thirty-six pilot values, when the count of the one or more 2.16 Gigahertz (GHz) channels is two.
11. The apparatus of claim 8 , wherein the predefined pilot sequence corresponding to the space-time stream number comprises a predefined pilot sequence, denoted P 56 (i STS , :), comprising fifty-six pilot values, when the count of the one or more 2.16 Gigahertz (GHz) channels is three.
12. The apparatus of claim 8 , wherein the predefined pilot sequence corresponding to the space-time stream number comprises a predefined pilot sequence, denoted P 76 (i STS , :), comprising seventy-six pilot values, when the count of the one or more 2.16 Gigahertz (GHz) channels is four.
13. The apparatus of claim 7 , wherein the predefined pilot sequence corresponding to the space-time stream number comprises at least one repetition of a predefined pilot sequence, denoted P 16 (i STS , :), comprising sixteen pilot values.
14. The apparatus of claim 13 , wherein the pilot sequence P 16 (i STS , :) is defined based on the space-time stream number, denoted i STS , as follows:
i STS
P 16 (i STS , :)
1
[+1 +1 +1 −1 +1 +1 −1 +1 +1 +1 +1 −1 −1 −1 +1 −1]
2
[−1 −1 −1 +1 −1 −1 +1 −1 +1 +1 +1 −1 −1 −1 +1 −1]
3
[−1 −1 −1 +1 +1 +1 −1 +1 −1 −1 −1 +1 −1 −1 +1 −1]
4
[+1 +1 +1 −1 −1 −1 +1 −1 −1 −1 −1 +1 −1 −1 +1 −1]
5
[−1 −1 +1 −1 −1 −1 −1 +1 −1 −1 +1 −1 +1 +1 +1 −1]
6
[+1 +1 −1 +1 +1 +1 +1 −1 −1 −1 +1 −1 +1 +1 +1 −1]
7
[+1 +1 −1 +1 −1 −1 −1 +1 +1 +1 −1 +1 +1 +1 +1 −1]
8
[−1 −1 +1 −1 +1 +1 +1 −1 +1 +1 −1 +1 +1 +1 +1 −1]
15. The apparatus of claim 1 configured to cause the EDMG STA to insert the plurality of pilot values at a plurality of pilot subcarrier indexes, which are frequency-channel dependent, and are independent of the space-time stream number and the OFDM symbol number.
16. The apparatus of claim 1 configured to cause the EDMG STA to transmit the OFDM mode transmission of the EDMG PPDU over a channel bandwidth of 2.16 Gigahertz (GHz), 4.32 GHz, 6.48 GHz, or 8.64 GHz.
17. The apparatus of claim 1 comprising a radio to transmit the OFDM mode transmission of the EDMG PPDU.
18. The apparatus of claim 17 comprising one or more antennas connected to the radio, a memory, and a processor to execute instructions of an operating system.
19. A product comprising one or more tangible computer-readable non-transitory storage media comprising computer-executable instructions operable to, when executed by at least one processor, enable the at least one processor to cause an Enhanced Directional Multi-Gigabit (DMG) (EDMG) wireless communication station (STA) to:
generate at least one pilot sequence corresponding to at least one respective space-time stream for an EDMG Physical Layer (PHY) Protocol Data Unit (PPDU), the pilot sequence comprising a plurality of pilot values, a pilot value of the plurality of pilot values is based on a space-time stream number of the space-time stream, an Orthogonal Frequency Division Multiplexing (OFDM) symbol number, and a subcarrier index; and
transmit an OFDM mode transmission of the EDMG PPDU comprising the at least one pilot sequence.
20. The product of claim 19 , wherein the instructions, when executed, cause the EDMG STA to determine the pilot value by applying a phase shift to a predefined pilot value, the phase shift is based on the space-time stream number and the OFDM symbol number, the predefined pilot value is based on the space-time stream number and the subcarrier index.
21. The product of claim 20 , wherein the phase shift comprises a product of a deterministic shift and a random shift, the deterministic shift is based on the space-time stream number and the OFDM symbol number, the random shift is based on a scrambler output corresponding to the OFDM symbol number.
22. The product of claim 20 , wherein the instructions, when executed, cause the EDMG STA to determine the predefined pilot value according to a predefined pilot sequence corresponding to the space-time stream number.
23. The product of claim 19 , wherein the instructions, when executed, cause the EDMG STA to insert the plurality of pilot values at a plurality of pilot subcarrier indexes, which are frequency-channel dependent, and are independent of the space-time stream number and the OFDM symbol number.
24. An apparatus comprising:
means for generating at an Enhanced Directional Multi-Gigabit (DMG) (EDMG) wireless communication station (STA) at least one pilot sequence corresponding to at least one respective space-time stream for an EDMG Physical Layer (PHY) Protocol Data Unit (PPDU), the pilot sequence comprising a plurality of pilot values, a pilot value of the plurality of pilot values is based on a space-time stream number of the space-time stream, an Orthogonal Frequency Division Multiplexing (OFDM) symbol number, and a subcarrier index; and
means for causing the EDMG STA to transmit an OFDM mode transmission of the EDMG PPDU comprising the at least one pilot sequence.
25. The apparatus of claim 24 comprising means for determining the pilot value by applying a phase shift to a predefined pilot value, the phase shift is based on the space-time stream number and the OFDM symbol number, the predefined pilot value is based on the space-time stream number and the subcarrier index.