Originator and recipient based transmissions in wireless communications

• US 9,356,666 B1
• Filed: 12/07/2015
• Issued: 05/31/2016
• Est. Priority Date: 06/13/2000
• Status: Expired due to Term

• Current Assignee: Comcast Cable Communications LLC (Comcast Corporation)
• Original Assignee: Comcast Cable Communications LLC (Comcast Corporation)
• Inventors: Agee, Brian G., Bromberg, Matthew C.
• Primary Examiner(s): ODOM, CURTIS B
• Application Number:
  US14/961,559
• Publication Number:
  US 20160134341A1
• Time in Patent Office: 176 Days
• US Class Current: 1/1
• CPC Class Codes: H04B 7/0408 using two or more beams, i.e. beam diversity
• CPC Class Codes: H04B 7/0413 MIMO systems
• CPC Class Codes: H04B 7/0417 Feedback systems
• CPC Class Codes: H04B 7/0443 utilizing "waterfilling" technique
• CPC Class Codes: H04B 7/0456 Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
• CPC Class Codes: H04B 7/0465 taking power constraints at power amplifier or emission constraints, e.g. constant modulus, into account
• CPC Class Codes: H04B 7/10 Polarisation diversity; Directional diversity
• CPC Class Codes: H04L 27/26 Systems using multi-frequency codes H04L27/32 takes precedence
• CPC Class Codes: H04L 27/2602 Signal structure
• CPC Class Codes: H04L 27/2605 Symbol extensions, e.g. Zero Tail, Unique Word [UW]
• CPC Class Codes: H04L 27/2607 Cyclic extensions
• CPC Class Codes: H04L 27/2627 Modulators
• CPC Class Codes: H04L 27/2646 using feedback from receiver for adjusting OFDM transmission parameters, e.g. transmission timing or guard interval length
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0044 allocation of payload
• CPC Class Codes: H04L 5/005 of common pilots, i.e. pilots destined for multiple users or terminals
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition
• CPC Class Codes: H04W 28/06 Optimizing the usage of the radio link, e.g. header compression, information sizing , discarding information system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365
• CPC Class Codes: H04W 40/04 based on wireless node resources
• CPC Class Codes: H04W 52/241 : taking into account channel quality metrics, e.g. SIR, SNR, CIR, Eb/lo
• CPC Class Codes: H04W 52/265 : taking into account the quality of service QoS
• CPC Class Codes: H04W 52/42 : in systems with time, space, frequency or polarisation diversity
• CPC Class Codes: H04W 72/00 : Local resource management
• CPC Class Codes: H04W 72/04 : Wireless resource allocation
• CPC Class Codes: H04W 72/044 : based on the type of the allocated resource
• CPC Class Codes: H04W 72/0453 : Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/23 : in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 72/542 : using measured or perceived quality
• CPC Class Codes: H04W 88/08 : Access point devices
• CPC Class Codes: Y02D 30/70 : in wireless communication networks

Abstract

Methods and systems are described for generating a signal, which may be based on, for example, a pseudorandom sequence associated with a group of nodes, a pseudorandom sequence associated with a recipient, and/or a complex sinusoid. The first node may transmit the signal as an orthogonal frequency division multiplexing (OFDM) transmission.

Claims

1. A method comprising:

generating, by a first node, a signal to be used for an orthogonal frequency division multiplexing (OFDM) transmission, the signal based at least in part on;

a first pseudorandom sequence associated with a group of nodes that comprises the first node; and

a second pseudorandom sequence associated with a first recipient of the OFDM transmission; and

transmitting, via one or more antennas of a plurality of antennas of the first node, the signal as at least part of the OFDM transmission.

2. The method of claim 1, wherein the signal comprises the first pseudorandom sequence modified by an originating node index overlay, the second pseudorandom sequence, and user data.

3. The method of claim 1, wherein at least a portion of the signal is modified by user data associated with the first recipient.

4. The method of claim 1, wherein the generating the signal comprises generating the signal further based at least in part on a complex sinusoid that is associated with an originator of the OFDM transmission.

5. The method of claim 1, wherein the first pseudorandom sequence is based at least in part on a first index associated with the first node, and the second pseudorandom sequence is based at least in part on a second index associated with the first recipient.

6. The method of claim 1, wherein the generating the signal comprises generating the signal such that at least a first portion of the signal is modified with user data associated with the first recipient, and wherein the OFDM transmission comprises at least the first portion of the signal modified with the user data and a second portion of the signal that is not modified with the user data.

7. The method of claim 1, wherein the transmitting comprises transmitting the OFDM transmission to multiple recipients, including the first recipient, using a multiple access scheme.

8. The method of claim 1, wherein the signal comprises a pilot signal.

9. The method of claim 1, wherein the first pseudorandom sequence identifies the group of nodes, and the second pseudorandom sequence identifies the first recipient.

10. A method comprising:

generating, by a first node, a signal to be used for an orthogonal frequency division multiplexing (OFDM) transmission, the signal based at least in part on;

user data associated with a second node; and

a pilot based at least in part on;

a first pilot comprising a first pseudorandom sequence that is associated with a group of nodes that comprises the first node;

a second pilot that is associated with the first node; and

a third pilot comprising a second pseudorandom sequence that is associated with a second node; and

transmitting, via one or more antennas of a plurality of antennas of the first node to at least the second node, the signal as at least part of the OFDM transmission.

11. The method of claim 10, wherein the second pilot comprises a complex sinusoid that is associated with the first node.

12. The method of claim 10, wherein the second pilot comprises an exponential of an imaginary quantity that is associated with the first node.

13. The method of claim 10, wherein the pilot comprises a downlink pilot signal.

14. The method of claim 10, wherein the signal comprises a first portion of the pilot combined with the user data and a second portion of the pilot that is not combined with the user data.

15. The method of claim 10, wherein the OFDM transmission comprises a time series of OFDM symbols, and wherein a first OFDM symbol of the time series of OFDM symbols comprises at least a portion of the pilot and a second OFDM symbol of the time series of OFDM symbols comprises at least a portion of the user data without the pilot.

16. The method of claim 10, wherein the transmitting comprises transmitting the OFDM transmission to multiple recipients using a multiple access scheme.

17. A method comprising:

generating, by a first node, a pilot to be used for an orthogonal frequency division multiplexing (OFDM) transmission to at least a second node, the pilot based at least in part on;

a first pseudorandom sequence associated with a group of nodes that comprises the first node; and

a second pseudorandom sequence associated with the second node; and

transmitting to at least the second node, via one or more antennas of a plurality of antennas of the first node, user data and the pilot as at least part of the OFDM transmission.

18. The method of claim 17, wherein the pilot comprises the first pseudorandom sequence modified by an originating node index overlay, the second pseudorandom sequence, and user data.

19. The method of claim 17, wherein at least a portion of the pilot is combined with the user data on an element-by-element basis.

20. The method of claim 17, wherein the generating the pilot comprises generating the pilot further based at least in part on a complex sinusoid that is associated with an originator of the OFDM transmission.

21. The method of claim 17, wherein the transmitting comprises transmitting the OFDM transmission to multiple recipients, including the second node, using a multiple access scheme.

22. The method of claim 17, wherein the pilot comprises a complex sinusoid that identifies an originator of the OFDM transmission, wherein the first pseudorandom sequence identifies the group of nodes, and wherein the second pseudorandom sequence identifies the second node.

23. The method of claim 17, wherein the pilot comprises a downlink pilot signal.

24. A first node comprising:

a plurality of antennas; and

circuitry configured to;

generate a signal to be used for an orthogonal frequency division multiplexing (OFDM) transmission to at least a second node, the signal based at least in part on;

user data;

a first pseudorandom sequence associated with a group of nodes that comprises the first node; and

a second pseudorandom sequence associated with the second node; and

cause the signal to be transmitted to at least the second node, via one or more antennas of the plurality of antennas, as at least part of the OFDM transmission.

25. The first node of claim 24, wherein the signal comprises the first pseudorandom sequence modified by an originating node index overlay, the second pseudorandom sequence, and the user data.

26. The first node of claim 24, wherein at least a portion of the signal comprises at least a portion of a pilot combined with the user data on an element-by-element basis.

27. The first node of claim 24, wherein the circuitry is configured to generate the signal further based at least in part on a complex sinusoid that is associated with an originator of the OFDM transmission.

28. The first node of claim 24, wherein the circuitry is configured to cause the OFDM transmission to be transmitted to multiple recipients, including the second node, using a multiple access scheme.

29. The first node of claim 24, wherein the signal comprises a complex sinusoid that identifies an originator of the OFDM transmission, wherein the first pseudorandom sequence identifies the group of nodes, and wherein the second pseudorandom sequence identifies the second node.

30. The first node of claim 24, wherein the circuitry comprises a processor.