METHODS AND APPARATUS FOR TRANSMISSION AND RECEPTION WITH PARTIAL ALLOCATION IN ORTHOGONAL FREQUENCY DIVISION MULTIPLE ACCESS/SINGLE-CARRIER FREQUENCY DIVISION MULTIPLE ACCESS SYSTEMS

• US 20180241593A1
• Filed: 02/19/2018
• Published: 08/23/2018
• Est. Priority Date: 02/21/2017
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: TIRUCHERAI MURALIDHARAN, Vijayvaradharaj, VUMMINTALA, Shashidhar, SOMICHETTY, Gowrisankar, SRIDHARAN, Arvind
• Granted Patent: US 10,560,294 B2
• Time in Patent Office: Days
• CPC Class Codes: H04J 11/0066 of narrowband interference narrowband interference reduction H04B1/1036
• CPC Class Codes: H04J 2011/0009 with FDM/FDMA
• CPC Class Codes: H04L 27/0008 arrangements for allowing a transmitter or receiver to use more than one type of modulation negotiating modulation type for two-way transmission paths H04L5/1453
• CPC Class Codes: H04L 27/2035 using a single or unspecified number of carriers
• CPC Class Codes: H04L 27/2627 Modulators
• CPC Class Codes: H04L 27/2633 using partial FFTs
• CPC Class Codes: H04L 27/2649 Demodulators
• CPC Class Codes: H04L 27/26522 using partial FFTs
• CPC Class Codes: H04L 27/26526 with inverse FFT [IFFT] or inverse DFT [IDFT] demodulators, e.g. standard single-carrier frequency-division multiple access [SC-FDMA] receiver or DFT spread orthogonal frequency division multiplexing [DFT-SOFDM]
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0064 Rate requirement of the data, e.g. scalable bandwidth, data priority
• CPC Class Codes: H04L 5/0091 Signaling for the administration of the divided path
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA

Abstract

Techniques and apparatus for transmission and reception with partial allocation in orthogonal frequency division multiple access (OFDMA)/single-carrier frequency division multiple access (SC-FDMA) systems are provided. One technique includes determining first parameter(s) to apply to transmission/receive processing of a signal, based in part on a resource allocation for the signal. The resource allocation is partitioned out of a larger system bandwidth. Second parameter(s) to apply to the transmission/receive processing are determined based at least in part on the first parameter(s). Transmission/receive processing of the signal is performed in accordance with the first and second parameters.

Claims

1. A method for wireless communications by an apparatus, comprising:

determining a first one or more parameters to apply to transmission processing of a signal, based at least in part on a resource allocation for the signal, wherein the resource allocation is partitioned out of a larger system bandwidth;

determining a second one or more parameters to apply to the transmission processing of the signal based at least in part on the determined first one or more parameters;

performing the transmission processing of the signal in accordance with the first and second parameters; and

transmitting the signal after performing the transmission processing.

2. The method of claim 1, wherein the first one or more parameters comprise at least one of a local oscillator (LO) frequency, front end processing bandwidth, or inverse fast fourier transform (IFFT) size.

3. The method of claim 2, wherein determining the first one or more parameters comprises selecting the front end processing bandwidth and the LO frequency such that the resource allocation is within the selected front end processing bandwidth.

4. The method of claim 3, wherein the front end processing bandwidth is larger than or equal to the resource allocation and smaller than the system bandwidth.

5. The method of claim 3, wherein the LO frequency is not at a center of the system bandwidth.

6. The method of claim 3, wherein the LO frequency is at the center of the system bandwidth.

7. The method of claim 3, wherein the resource allocation comprises the LO frequency.

8. The method of claim 3, wherein the resource allocation does not comprise the LO frequency.

9. The method of claim 2, wherein a number of bins associated with the IFFT size is larger than or equal to a number of tones associated with the resource allocation and smaller than a number of tones associated with the system bandwidth.

10. The method of claim 2, wherein the second one or more parameters comprise at least one of a tone offset, phase ramp, phase offset, or LO frequency offset.

11. The method of claim 10, wherein:

performing the transmission processing comprises performing a phase compensation procedure on the signal; and

performing the phase compensation procedure comprises at least one of;

applying the tone offset to the resource allocation of the signal prior to transforming the signal from frequency domain to time domain;

applying the phase ramp to the signal in the time domain or a frequency shift in the frequency domain;

or

applying a phase shift to each symbol of the signal.

12. The method of claim 10, wherein determining the second one or more parameters comprises selecting the at least one of the tone offset, phase ramp, phase offset, or LO frequency offset such that a phase difference between a start of one or more symbols of the signal and an end of the one or more symbols of the signal is zero.

13. The method of claim 1, wherein at least one of the first one or more parameters or the second one or more parameters is adaptively changed based in part on a location of the resource allocation within the system bandwidth.

14. The method of claim 1, wherein the signal comprises one or more orthogonal frequency division multiple access (OFDMA) symbols or one or more single-carrier frequency division multiple access (SC-FDMA) symbols.

15. An apparatus for wireless communication, comprising:

at least one processor configured to;

determine a first one or more parameters to apply to transmission processing of a signal, based at least in part on a resource allocation for the signal, wherein the resource allocation is partitioned out of a larger system bandwidth;

determine a second one or more parameters to apply to the transmission processing of the signal based at least in part on the determined first one or more parameters;

perform the transmission processing of the signal in accordance with the first and second parameters; and

transmit the signal after performing the transmission processing; and

a memory coupled to the at least one processor.

16. A method for wireless communications by an apparatus, comprising:

determining a first one or more parameters to apply to receive processing of a signal received from another apparatus, based at least in part on a resource allocation used for the signal, wherein the resource allocation is partitioned out of a larger system bandwidth;

determining a second one or more parameters to apply to the receive processing of the signal based at least in part on the determined first one or more parameters; and

performing the receive processing of the signal in accordance with the first and second parameters.

17. The method of claim 16, wherein the first one or more parameters comprise at least one of a local oscillator (LO) frequency, front end processing bandwidth, or fast fourier transform (FFT) size.

18. The method of claim 17, wherein determining the first one or more parameters comprises selecting the front end processing bandwidth and the LO frequency such that the resource allocation is within the selected front end processing bandwidth.

19. The method of claim 18, wherein the front end processing bandwidth is larger than or equal to the resource allocation and smaller than the system bandwidth.

20. The method of claim 18, wherein the LO frequency is not at a center of the system bandwidth.

21. The method of claim 18, wherein the LO frequency is at the center of the system bandwidth.

22. The method of claim 18, wherein the resource allocation comprises the LO frequency.

23. The method of claim 18, wherein the resource allocation does not comprise the LO frequency.

24. The method of claim 17, wherein a number of bins associated with the FFT size is larger than or equal to a number of tones associated with the resource allocation and smaller than a number of tones associated with the system bandwidth.

25. The method of claim 17, wherein the second one or more parameters comprise at least one of a tone offset, phase ramp, phase offset, or LO frequency offset.

26. The method of claim 25, wherein:

performing the receive processing comprises performing a phase compensation procedure on the received signal; and

performing the phase compensation procedure comprises at least one of;

applying the tone offset to the resource allocation of the signal after transforming the signal from time domain to frequency domain;

applying the phase ramp to the signal in the time domain;

or

applying a phase shift to each symbol of the signal.

27. The method of claim 25, wherein determining the second one or more parameters comprises selecting the at least one of the tone offset, phase ramp, phase offset, or LO frequency offset such that a phase difference between a start of one or more symbols of the signal and an end of the one or more symbols of the signal is zero.

28. The method of claim 16, wherein at least one of the first one or more parameters or the second one or more parameters is adaptively changed based in part on a location of the resource allocation within the system bandwidth.

29. The method of claim 16, wherein the signal comprises one or more orthogonal frequency division multiple access (OFDMA) symbols or one or more single-carrier frequency division multiple access (SC-FDMA) symbols.

30. An apparatus for wireless communication, comprising:

at least one processor configured to;

determine a first one or more parameters to apply to receive processing of a signal received from another apparatus, based at least in part on a resource allocation used for the signal, wherein the resource allocation is partitioned out of a larger system bandwidth;

determine a second one or more parameters to apply to the receive processing of the signal based at least in part on the determined first one or more parameters; and

perform the receive processing of the signal in accordance with the first and second parameters; and

a memory coupled to the at least one processor.