Frame formatting for communications within single user, multiple user, multiple access, and/or MIMO wireless communications
View Patent ↗Frame formatting for communications within single user, multiple user, multiple access, and/or MIMO wireless communications. A signal is processed within a communication device using at least two respective downclocking ratios (e.g., a first downclocking ratio applied to a first portion of the signal such as a frame or packet extracted there from, a second downclocking ratio applied to a second portion of the signal). Alternatively, a signal is divided into more than two respective portions, and different respective downclocking ratios are applied to those different respective portions (e.g., a first downclocking ratio applied to a first portion of the signal, and so on up to an n-th downclocking ratio applied to an n-th portion of the signal). Some implementations apply a singular or common downclocking ratio to more than one portion of the signal (which may be contiguous/adjacent or non-contiguous/non-adjacent within the signal).
1. A device comprising:
a communication interface; and
processing circuitry that is coupled to the communication interface and is configured to:
receive via the communication interface a signal from another device via a wireless communication channel;
generate a first clock signal according to a first downclocking factor;
process a first at least one orthogonal frequency division multiplexing (OFDM) symbol of an OFDM packet of the signal based at least on the first clock signal to extend OFDM symbol duration of the first at least one OFDM symbol of the OFDM packet, wherein the extended OFDM symbol duration of the first at least one OFDM symbol of the OFDM packet reduces a number of symbols in a preamble length by supporting a merger of at least two preamble symbols;
generate a second clock signal according to a second downclocking factor; and
process a second at least one OFDM symbol of the OFDM packet based at least on the second clock signal to extend OFDM symbol duration of the second at least one OFDM symbol of the OFDM packet by a different symbol extension amount than a third OFDM symbol duration of a third at least one OFDM symbol of the OFDM packet, wherein the first at least one OFDM symbol is in a non-VHT portion of the OFDM packet and the second at least one OFDM symbol is in a VHT portion of the OFDM packet.
2. The device of claim 1 , wherein the processing circuitry is further configured to:
generate the first clock signal by downclocking a third clock signal using the first downclocking factor; and
generate the second clock signal by downclocking the third clock signal using the second downclocking factor.
3. The device of claim 1 , wherein the processing circuitry is further configured to:
receive another signal from the another device via the wireless communication channel;
process a third at least one OFDM symbol of another OFDM packet of the another signal based on a third clock signal;
generate a fourth clock signal according to a third downclocking factor; and
process a fourth at least one OFDM symbol of the another OFDM packet based on the fourth clock signal to extend OFDM symbol duration of the fourth at least one OFDM symbol of the another OFDM packet.
4. The device of claim 1 , wherein:
the first at least one OFDM symbol of the OFDM packet includes at least one signal field (SIG); and
the second at least one_OFDM symbol of the OFDM packet includes at least one data field.
5. The device of claim 1 , wherein the device or the another device includes a laptop host computer, a personal digital assistant host, a personal computer host or cellular telephone host.
6. The device of claim 1 , wherein the first at least one OFDM symbol of the OFDM packet includes at least one of at least one short training field (STF) or at least one long training field (LTF).
7. The device of claim 1 , wherein:
the second at least one OFDM symbol of the OFDM packet includes at least one data field.
8. The device of claim 1 , further comprising:
an access point (AP), wherein the another device includes a wireless station (STA).
9. The device of claim 1 , further comprising:
a wireless station (STA), wherein the another device includes an access point (AP).
10. A device comprising:
a communication interface; and
processing circuitry that is coupled to the communication interface and is configured to:
receive, via the communication interface a signal from another device via a wireless communication channel;
generate a first clock signal according to a first downclocking factor;
process a first at least one orthogonal frequency division multiplexing (OFDM) symbol of an OFDM packet of the signal based at least on the first clock signal;
generate a second clock signal according to a second downclocking factor; and
process a second at least one OFDM symbol of the OFDM packet based at least on the second clock signal,
receive another signal from the another device via the wireless communication channel;
process a third at least one OFDM symbol of another OFDM packet of the another signal based on a third clock signal;
generate a fourth clock signal according to a third downclocking factor;
process a fourth at least one OFDM symbol of the another OFDM packet based on the fourth clock signal;
generate the first clock signal by downclocking the third clock signal using the first downclocking factor;
generate the second clock signal by downclocking the third clock signal using the second downclocking factor; and
generate the fourth clock signal by downclocking the third clock signal using the third downclocking factor.
11. A device comprising:
a communication interface; and
processing circuitry that is coupled to the communication interface and is configured to:
receive via the communication interface a signal from another device via a wireless communication channel;
process a first at least one orthogonal frequency division multiplexing (OFDM) symbol of an OFDM packet of the signal based on a first clock signal;
process a second at least one OFDM symbol of the OFDM packet based on a second clock signal to extend OFDM symbol duration of the second at least one OFDM symbol of the OFDM packet; and
process a third at least one OFDM symbol of the OFDM packet based on a third clock signal to extend OFDM symbol duration of the third at least one OFDM symbol of the OFDM packet by a different symbol extension amount than the second at least one OFDM symbol of the OFDM packet.
12. The device of claim 11 , wherein the processing circuitry is further configured to:
generate the second clock signal and the third clock signal according to the first clock signal, a first ratio between the first clock signal and the second clock signal different from a second ratio between the first clock signal and the third clock signal.
13. The device of claim 11 , wherein the processing circuitry is further configured to:
receive another signal from the another device via the wireless communication channel;
process a fourth at least one OFDM symbol of another OFDM packet of the another signal based on the first clock signal; and
process a fifth at least one OFDM symbol of the another OFDM packet based on a fourth clock signal to extend OFDM symbol duration of the fifth at least one OFDM symbol of the another OFDM packet.
14. The device of claim 11 , wherein:
the first at least one OFDM symbol of the OFDM packet includes at least one signal field (SIG); and
the second at least one OFDM symbol of the OFDM packet includes at least one data field.
15. The device of claim 11 , wherein the device or the another device includes a laptop host computer, a personal digital assistant host, a personal computer host or cellular telephone host.
16. The device of claim 11 , wherein:
the first at least one OFDM symbol of the OFDM packet includes at least one signal field (SIG);
the second at least one OFDM symbol of the OFDM packet includes at least one of at least one short training field (STF) or at least one long training field (LTF); and
the third at least one OFDM symbol of the OFDM packet includes at least one data field.
17. The device of claim 11 , further comprising:
an access point (AP), wherein the another device includes a wireless station (STA).
18. The device of claim 11 , further comprising:
a wireless station (STA), wherein the another device includes an access point (AP).
19. A method comprising:
receiving a signal from a wireless communication device via a wireless communication channel;
generating a first clock signal according to a first downclocking factor;
processing a first at least one orthogonal frequency division multiplexing (OFDM) symbol of an OFDM packet of the signal based at least on the first clock signal to extend OFDM symbol duration of the first at least one OFDM symbol of the OFDM packet, wherein the extended OFDM symbol duration of the first at least one OFDM symbol of the OFDM packet reduces a number of symbols in a preamble length by supporting a merger of at least two preamble symbols;
generating a second clock signal according to a second downclocking factor; and
processing a second at least one OFDM symbol of the OFDM packet based at least on the second clock signal to extend OFDM symbol duration of the second at least one OFDM symbol of the OFDM packet by a different symbol extension amount than a third OFDM symbol duration of a third at least one OFDM symbol of the OFDM packet, wherein the first at least one OFDM symbol is in a non-VHT portion of the OFDM packet and the second at least one OFDM symbol is in a VHT portion of the OFDM packet.
20. The method of claim 19 , wherein:
generating the first clock signal includes downclocking a third clock signal using the first downclocking factor, and
generating the second clock signal includes downclocking the third clock signal using the second downclocking factor.