Apparatus, system and method of transmitting a PPDU
An apparatus of a transmitter may include, for example, a Golay builder to build modulated Golay sequences for at least a non-EDMG Short Training Field (L-STF), and a non-EDMG Channel Estimation Field (L-CEF) of a PPDU; a scrambler to generate scrambled bits by scrambling bits of a non-EDMG header (L-header) and a data field of the PPDU; an encoder to encode the scrambled bits into encoded bits according to a low-density parity-check (LDPC) code; a constellation mapper to map the encoded bits into a stream of constellation points according to a constellation scheme; a spreader to spread the stream of constellation points according to a Golay sequence; and a transmit chain mapper to map a bit stream output from the Golay builder and the spreader to a plurality of transmit chains by applying a spatial expansion with relative cyclic shift over the plurality of transmit chains.
1. An apparatus comprising:
a transmitter comprising logic and circuitry configured to generate a transmission of an Enhanced Directional Multi-Gigabit (DMG) (EDMG) Orthogonal Frequency Division Multiplexing (OFDM) Multi User (MU) Physical Layer (PHY) Protocol Data Unit (PPDU) for a plurality of users, the transmitter configured to generate a plurality of space-time stream flows corresponding to the plurality of users, respectively, a space-time stream flow corresponding to a user comprising one or more space-time streams corresponding to the user, wherein the transmitter is configured to encode the EDMG OFDM MU PPDU with an independent flow per user, and to maintain a common space-time stream numeration over all users of the plurality of users, the transmitter comprising:
a preamble builder to build symbols of an EDMG Short Training Field (EDMG-STF) and an EDMG Channel Estimation Field (EDMG-CEF) of the space-time stream flow corresponding to the user;
a scrambler to generate scrambled bits of the space-time stream flow corresponding to the user by scrambling bits of a data field for the user;
a Low-Density Parity-Check (LDPC) encoder to encode the scrambled bits of the space-time stream flow corresponding to the user into encoded bits of the space-time stream flow corresponding to the user according to an LDPC code;
a constellation mapper to map the encoded bits of the space-time stream flow corresponding to the user into constellation points over one or more spatial streams of the space-time stream flow corresponding to the user; and
a spatial mapper to map the plurality of space-time stream flows corresponding to the plurality of users to a plurality of transmit chains, wherein the one or more space-time streams corresponding to the user are based on the symbols of the EDMG-STF and EDMG-CEF of the space-time stream flow corresponding to the user, and on the constellation points over the one or more spatial streams of the space-time stream flow corresponding to the user.
2. The apparatus of claim 1 , wherein the transmitter is configured to generate the encoded bits of the space-time stream flow corresponding to the user based on a seed value for the user.
3. The apparatus of claim 1 , wherein the transmitter is configured to generate the encoded bits of the space-time stream flow corresponding to the user based on a seed value in an EDMG Header B of the EDMG OFDM MU PPDU.
4. The apparatus of claim 1 , wherein the space-time stream flow corresponding to the user comprises no more than two space-time streams corresponding to the user.
5. The apparatus of claim 1 , wherein the one or more spatial streams of the space-time stream flow corresponding to the user comprises no more than two spatial streams.
6. The apparatus of claim 1 comprising a stream parser to divide an output of the LDPC encoder to the one or more spatial streams of the space-time stream flow corresponding to the user.
7. The apparatus of claim 6 , wherein the stream parser is configured to provide the encoded bits of the space-time stream flow corresponding to the user to the constellation mapper over the one or more spatial streams of the space-time stream flow corresponding to the user.
8. The apparatus of claim 1 comprising a Space Time Block Code (STBC) encoder to spread the constellation points from the one or more spatial streams of the space-time stream flow corresponding to the user into a plurality of space-time streams of the space-time stream flow corresponding to the user.
9. The apparatus of claim 8 , wherein a count of the plurality of space-time streams of the space-time stream flow corresponding to the user is double a count of the one or more spatial streams of the space-time stream flow corresponding to the user.
10. The apparatus of claim 1 comprising an interleaver to interleave symbols in an OFDM symbol of the one or more spatial streams of the space-time stream flow corresponding to the user.
11. The apparatus of claim 1 , wherein the spatial mapper is to map space-time streams of the plurality of space-time stream flows to the plurality of transmit chains according to a direct mapping scheme by mapping constellation points from each space-time stream directly to the transmit chains.
12. The apparatus of claim 1 , wherein the spatial mapper is to map space-time streams of the plurality of space-time stream flows to the plurality of transmit chains according to an indirect mapping scheme by mapping constellation points from each space-time stream to each transmit chain.
13. The apparatus of claim 1 , wherein the spatial mapper is to map space-time streams of the plurality of space-time stream flows to the plurality of transmit chains according to a digital beamforming scheme by multiplying each vector of constellation points from all of the space-time streams by a matrix of steering vectors.
14. The apparatus of claim 1 comprising a combiner to provide a space-time stream of the one or more space-time streams corresponding to the user by combining the symbols of the EDMG-STF and EDMG-CEF of the space-time stream flow corresponding to the user, with constellation points for the space-time stream.
15. The apparatus of claim 1 , wherein the preamble builder is configured to build the symbols of the EDMG-STF and EDMG-CEF of the space-time stream flow corresponding to the user in a frequency domain.
16. The apparatus of claim 1 , wherein the transmitter is configured to transmit the EDMG OFDM MU PPDU via the plurality of transmit chains in a channel bandwidth of at least 2.16 Gigahertz (GHz) over a frequency band above 45 GHz.
17. The apparatus of claim 1 , wherein the transmitter is configured to transmit the EDMG OFDM MU PPDU over a channel bandwidth of 2.16 Gigahertz (GHz), 4.32 GHz, 6.48 GHz, or 8.64 GHz.
18. The apparatus of claim 1 comprising the plurality of transmit chains to transmit the EDMG OFDM MU PPDU.
19. The apparatus of claim 18 comprising a plurality of antennas connected to the plurality of transmit chains, a memory, and a processor to execute instructions of an Operating System (OS).
20. 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 a transmission of an EDMG Orthogonal Frequency Division Multiplexing (OFDM) Multi User (MU) Physical Layer (PHY) Protocol Data Unit (PPDU) for a plurality of users, wherein the instructions, when executed, cause the EDMG STA to:
generate a plurality of space-time stream flows corresponding to the plurality of users, respectively, a space-time stream flow corresponding to a user comprising one or more space-time streams corresponding to the user, wherein generating the plurality of space-time stream flows corresponding to the plurality of users comprises encoding the EDMG OFDM MU PPDU with an independent flow per user, and maintaining a common space-time stream numeration over all users of the plurality of users, wherein generating the plurality of space-time stream flows corresponding to the plurality of users comprises:
building symbols of an EDMG Short Training Field (EDMG-STF) and an EDMG Channel Estimation Field (EDMG-CEF) of the space-time stream flow corresponding to the user;
generating scrambled bits of the space-time stream flow corresponding to the user by scrambling bits of a data field for the user;
encoding the scrambled bits of the space-time stream flow corresponding to the user into encoded bits of the space-time stream flow corresponding to the user according to a Low-Density Parity-Check (LDPC) code; and
mapping the encoded bits of the space-time stream flow corresponding to the user into constellation points over one or more spatial streams of the space-time stream flow corresponding to the user; and
map the plurality of space-time stream flows corresponding to the plurality of users to a plurality of transmit chains, wherein the one or more space-time streams corresponding to the user are based on the symbols of the EDMG-STF and EDMG-CEF of the space-time stream flow corresponding to the user, and on the constellation points over the one or more spatial streams of the space-time stream flow corresponding to the user.
21. The product of claim 20 , wherein the instructions, when executed, cause the EDMG STA to generate the encoded bits of the space-time stream flow corresponding to the user based on a seed value for the user.
22. The product of claim 20 , wherein the instructions, when executed, cause the EDMG STA to generate the encoded bits of the space-time stream flow corresponding to the user based on a seed value in an EDMG Header B of the EDMG OFDM MU PPDU.
23. An apparatus for generating at an Enhanced Directional Multi-Gigabit (DMG) (EDMG) wireless communication station (STA) a transmission of an EDMG Orthogonal Frequency Division Multiplexing (OFDM) Multi User (MU) Physical Layer (PHY) Protocol Data Unit (PPDU) for a plurality of users, the apparatus comprising:
means for generating a plurality of space-time stream flows corresponding to the plurality of users, respectively, a space-time stream flow corresponding to a user comprising one or more space-time streams corresponding to the user, wherein generating the plurality of space-time stream flows corresponding to the plurality of users comprises encoding the EDMG OFDM MU PPDU with an independent flow per user, and maintaining a common space-time stream numeration over all users of the plurality of users, wherein generating the plurality of space-time stream flows corresponding to the plurality of users comprises:
building symbols of an EDMG Short Training Field (EDMG-STF) and an EDMG Channel Estimation Field (EDMG-CEF) of the space-time stream flow corresponding to the user;
generating scrambled bits of the space-time stream flow corresponding to the user by scrambling bits of a data field for the user;
encoding the scrambled bits of the space-time stream flow corresponding to the user into encoded bits of the space-time stream flow corresponding to the user according to a Low-Density Parity-Check (LDPC) code; and
mapping the encoded bits of the space-time stream flow corresponding to the user into constellation points over one or more spatial streams of the space-time stream flow corresponding to the user; and
means for mapping the plurality of space-time stream flows corresponding to the plurality of users to a plurality of transmit chains, wherein the one or more space-time streams corresponding to the user are based on the symbols of the EDMG-STF and EDMG-CEF of the space-time stream flow corresponding to the user, and on the constellation points over the one or more spatial streams of the space-time stream flow corresponding to the user.
24. The apparatus of claim 23 , wherein the means for generating the plurality of space-time stream flows corresponding to the plurality of users comprises means for providing a space-time stream of the one or more space-time streams corresponding to the user by combining the symbols of the EDMG-STF and EDMG-CEF of the space-time stream flow corresponding to the user with constellation points for the space-time stream.