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

Patent metadata

Field	Value
Publication number	US-2016269145-A1
Application number	US-201514856491-A
Country	US
Kind code	A1
Filing date	Sep 16, 2015
Priority date	Mar 15, 2015
Publication date	Sep 15, 2016
Grant date	—

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 signal employing a first type of modulation associated with orthogonal wireless communication, and a second signal employing a second type of modulation associated with non-orthogonal underlay wireless communication; and a decoder coupled to the receiver circuit to obtain the wireless transmission, the decoder adapted to decode the first signal and the second signal.

2 . The wireless communication device of claim 1 , wherein:
the first signal employs orthogonal frequency division multiplexing (OFDM) modulation for the first type of modulation associated with orthogonal wireless communication; and the second 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 signals are one of symbol level synchronous or symbol level asynchronous.

4 . The wireless communication device of claim 1 , wherein the first and second 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 signal that is orthogonal multiplexed with the first signal.

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

7 . The wireless communication device of claim 1 , wherein the second signal is configured to be longer than the first signal.

8 . The wireless communication device of claim 1 , wherein the decoder adapted to decode the first signal and the second signal comprises the decoder adapted to:
decode the first signal; subtract the decoded first signal from the wireless transmission; and decode the second signal from the wireless transmission without the first signal.

9 . 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 signal employing a first type of modulation associated with orthogonal wireless communication, and a second signal employing a second type of modulation associated with non-orthogonal wireless communication; and decoding the first signal and the second signal.

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

11 . The method of claim 9 , wherein the first and second signals are one of symbol level synchronous or symbol level asynchronous.

12 . The method of claim 9 , wherein the first and second signals are one of transmission time interval (TTI) level synchronous or TTI level asynchronous.

13 . The method of claim 9 , further comprising: receiving a third signal that is orthogonally multiplexed with the first signal.

14 . The method of claim 9 , wherein a transmission power associated with the second signal is less than a transmission power associated with the first signal.

15 . The method of claim 9 , wherein decoding the first signal and the second signal comprises:
decoding the first signal; subtracting the decoded first signal from the wireless transmission; and decoding the second signal from the wireless transmission without the first signal.

16 . A wireless communication device, comprising:
means for receiving a wireless transmission via a particular time and frequency resource, the wireless transmission comprising a first signal employing a first type of modulation associated with orthogonal wireless communication, and a second signal employing a second type of modulation associated with non-orthogonal wireless communication; and means for decoding the first signal and the second signal.

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

18 . The wireless communication device of claim 16 , further comprising:
means for receiving a third signal that is orthogonal multiplexed with the first signal.

19 . The wireless communication device of claim 16 , wherein a transmission power associated with the second signal is less than a transmission power associated with the first signal.

20 . The wireless communication device of claim 16 , wherein the means for decoding the first signal and the second signal comprises:
means for decoding the first signal; means for subtracting the decoded first signal from the wireless transmission; and means for decoding the second signal from the wireless transmission without the first signal.

21 . A 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 signal employing a first type of modulation associated with orthogonal wireless communication, and a second signal employing a second type of modulation associated with non-orthogonal wireless communication; and decode the first signal and the second signal.

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

23 . The processor-readable storage medium of claim 21 , further comprising processor-executable programming for causing a processing circuit to receive a third signal that is orthogonal multiplexed with the first signal.

24 . The processor-readable storage medium of claim 21 , wherein the processor-executable programming for causing a processing circuit to comprises processor-executable programming for causing a processing circuit to:
decode the first signal; subtract the decoded first signal from the wireless transmission; and decode the second signal from the wireless transmission without the first signal.

25 . A wireless communication device, comprising:
an encoder adapted to encode data for transmission utilizing a first type of modulation associated with non-orthogonal wireless communication; and a transmitter circuit coupled to the encoder, to transmit the data as a first signal utilizing the modulation associated with the non-orthogonal wireless communication; wherein the first signal is transmitted over at least a portion

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

• H04L1/0009 Primary

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

• H04B2201/70701

  featuring pilot assisted reception · CPC title

• H04L27/2601

  Multicarrier modulation systems · CPC title

• H04W72/0446

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