Devices and methods for facilitating a non-orthogonal underlay in wireless communications systems

Patent metadata

Field	Value
Publication number	US-10389477-B2
Application number	US-201514856491-A
Country	US
Kind code	B2
Filing date	Sep 16, 2015
Priority date	Mar 15, 2015
Publication date	Aug 20, 2019
Grant date	Aug 20, 2019

Abstract

Wireless communication devices are adapted to facilitate non-orthogonal underlay transmissions. In one example, wireless communication devices can receive a wireless transmission via a particular time and frequency resource, where the wireless transmission includes a first signal employing a modulation associated with orthogonal wireless communication, and a second signal employing a modulation associated with non-orthogonal wireless communication. The wireless communication device can decode the first signal and the second signal. In another example, wireless communication devices may transmit a first signal utilizing a first type of modulation associated with non-orthogonal wireless communication, where the first signal is transmitted over at least a portion of a time and frequency resource scheduled for a second signal from a second wireless communication device, the second signal utilizing a second type of modulation associated with orthogonal wireless communication. Other aspects, embodiments, and features are also included.

First claim

What is claimed is:

1. A wireless communication device, comprising:
a receiver circuit adapted to receive a wireless transmission via a particular time and frequency resource, the wireless transmission comprising a first data signal from a first wireless device on the particular time and frequency resource employing a first type of modulation associated with orthogonal wireless communication, and a second data signal from a second wireless device on the particular time and frequency resource employing a second type of modulation associated with non-orthogonal underlay wireless communication, the second data signal being longer in duration than the first data signal from the first wireless device; and
a decoder coupled to the receiver circuit to obtain the wireless transmission, the decoder adapted to decode the first data signal and the second data signal.

2. The wireless communication device of claim 1 , wherein:
the first data signal employs orthogonal frequency division multiplexing (OFDM) modulation for the first type of modulation associated with orthogonal wireless communication; and
the second data signal employs code division multiplexing (CDM) modulation for the second type of modulation associated with the non-orthogonal underlay wireless communication.

3. The wireless communication device of claim 1 , wherein the first and second data signals are one of symbol level synchronous or symbol level asynchronous.

4. The wireless communication device of claim 1 , wherein the first and second data signals are one of transmission time interval (TTI) level synchronous or TTI level asynchronous.

5. The wireless communication device of claim 1 , wherein the receiver circuit further receives a third data signal from a third wireless device that is orthogonal multiplexed with the first data signal.

6. The wireless communication device of claim 1 , wherein a transmission power associated with the second data signal is less than a transmission power associated with the first data signal.

7. The wireless communication device of claim 1 , wherein the decoder adapted to decode the first data signal and the second data signal comprises the decoder adapted to:
decode the first data signal while treating the second data signal as noise;
subtract the decoded first data signal from the wireless transmission; and
decode the second data signal from the wireless transmission without the first data signal.

8. A method operational on a wireless communication device, comprising:
receiving a wireless transmission via a particular time and frequency resource, the wireless transmission comprising a first data signal from a first wireless device on the particular time and frequency resource employing a first type of modulation associated with orthogonal wireless communication, and a second data signal from a second wireless device on the particular time and frequency resource employing a second type of modulation associated with non-orthogonal wireless communication, wherein the second data signal is longer in duration than the first data signal from the first wireless device; and
decoding the first data signal and the second data signal.

9. The method of claim 8 , wherein:
the first data signal employs orthogonal frequency division multiplexing (OFDM) modulation for the first type of modulation associated with orthogonal wireless communication; and
the second data signal employs code division multiplexing (CDM) modulation for the second type of modulation associated with the non-orthogonal underlay wireless communication.

10. The method of claim 8 , wherein the first and second data signals are one of symbol level synchronous or symbol level asynchronous.

11. The method of claim 8 , wherein the first and second data signals are one of transmission time interval (TTI) level synchronous or TTI level asynchronous.

12. The method of claim 8 , further comprising: receiving a third data signal from a third wireless device that is orthogonally multiplexed with the first data signal.

13. The method of claim 8 , wherein a transmission power associated with the second data signal is less than a transmission power associated with the first data signal.

14. The method of claim 8 , wherein decoding the first data signal and the second data signal comprises:
decoding the first data signal while treating the second data signal as noise;
subtracting the decoded first data signal from the wireless transmission; and
decoding the second data signal from the wireless transmission without the first data signal.

15. A wireless communication device, comprising:
means for receiving a wireless transmission via a particular time and frequency resource, the wireless transmission comprising a first data signal from a first wireless device on the particular time and frequency resource employing a first type of modulation associated with orthogonal wireless communication, and a second data signal from a second wireless device on the particular time and frequency resource that is longer in duration than the first data signal, the second signal employing a second type of modulation associated with non-orthogonal wireless communication; and
means for decoding the first data signal and the second data signal.

16. The wireless communication device of claim 15 , wherein:
the first data signal employs orthogonal frequency division multiplexing (OFDM) modulation for the first type of modulation associated with orthogonal wireless communication; and
the second data signal employs code division multiplexing (CDM) modulation for the second type of modulation associated with the non-orthogonal underlay wireless communication.

17. The wireless communication device of claim 15 , further comprising:
means for receiving a third data signal from a third wireless device that is orthogonal multiplexed with the first data signal.

18. The wireless communication device of claim 15 , wherein a transmission power associated with the second data signal is less than a transmission power associated with the first data signal.

19. The wireless communication device of claim 15 , wherein the means for decoding the first data signal and the second data signal comprises:
means for decoding the first data signal while treating the second data signal as noise;
means for subtracting the decoded first data signal from the wireless transmission; and
means for decoding the second data signal from the wireless transmission without the first data signal.

20. A non-transitory processor-readable storage medium storing processor-executable programming for causing a processing circuit to:
receive a wireless transmission via a particular time and frequency resource, the wireless transmission comprising a first data signal from a first wireless device on the particular time and frequency resource employing a first type of modulation associated with orthogonal wireless communication, and a second data signal from a second wireless device on the particular time and frequency resource that is longer in duration than the first data signal, the second data signal employing a second type of modulation associated with non-orthogonal wireless communication; and
decode the first data signal and the second data signal.

21. The processor-readable storage medium of claim 20 , wherein:
the first data signal employs orthogonal frequency division multiplexing (OFDM) modulation for the first type of modulation associated with orthogonal wireless communication; and
the second d

Assignees

• Qualcomm Inc

Inventors

• Ji Tingfang
• Smee John Edward
• Soriaga Joseph Binamira
• Bhushan Naga
• Zeng Wei
• Mukkavilli Krishna Kiran

Classifications

• H04B1/7107 Primary

  Subtractive interference cancellation · CPC title

• H04B2201/70701

  featuring pilot assisted reception · CPC title

• H04W72/0446

  Resources in time domain, e.g. slots or frames · CPC title

• H04L27/2601

  Multicarrier modulation systems · CPC title

• H04L1/0009 Primary

  by adapting the channel coding (H04L1/1812 takes precedence) · CPC title