Hybrid orthogonal frequency division multiple access WTRU and method

• US 9,077,488 B2
• Filed: 01/27/2014
• Issued: 07/07/2015
• Est. Priority Date: 04/22/2005
• Status: Active Grant

• Current Assignee: Apple Inc.
• Original Assignee: Intel Corporation
• Inventors: Tsai, Yingming, Zhang, Guodong, Pan, Kyle Jung-Lin
• Primary Examiner(s): Tran, Khanh C
• Application Number:
  US14/164,670
• Publication Number:
  US 20140204899A1
• Time in Patent Office: 526 Days
• Field of Search: 375131-132, 375/138, 375/260, 375/267, 375/299, 375/340, 375/342, 375346-350, 370/208, 370/210
• US Class Current: 1/1
• CPC Class Codes: H04L 27/2601 Multicarrier modulation systems
• CPC Class Codes: H04L 27/2647 Arrangements specific to the receiver only equalisation H04L27/01
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0016 Time-frequency-code
• CPC Class Codes: H04L 5/0037 Inter-user or inter-terminal allocation
• 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: H04L 5/0073 Allocation arrangements that take into account other cell interferences for intercell interference mitigation or co-ordination in orthogonal multiplex systems H04J11/005

Abstract

A hybrid orthogonal frequency division multiple access (OFDMA) wireless transmit/receive unit (WTRU) and method are disclosed. A WTRU includes a transmitter and a receiver. The receiver processes received data to recover data mapped to the subcarriers using OFDMA. The receiver recovers first input data by separating user data from multi-user spread data and recovers second input data from non-spread data.

Claims

1. A node B base station comprising:

circuitry to map transmission data to physical resources modulated according to an orthogonal frequency division multiple access (OFDMA) scheme, wherein the mapped transmission data comprises;

data for a plurality of users mapped to a plurality of subcarriers of a first OFDM (orthogonal frequency division multiplexing) symbol time slot; and

data for the plurality of users mapped to a plurality of subcarriers of a second OFDM symbol time slot, wherein data for at least one of the plurality of users is mapped to a different subcarrier in the first and second OFDM symbol time slots; and

transmission circuitry to transmit the first and the second OFDM symbol time slot data including the mapped transmission data, wherein at least one of the first or second OFDM symbol time slot data further includes downlink reference signal data.

2. The node B base station of claim 1, wherein the downlink reference signal data comprises common reference signal data.

3. The node base station of claim 1, wherein the downlink reference signal data is not processed via the circuitry to map the transmission data.

4. The node B base station of claim 1, further comprising:

a cyclic prefix insertion unit to insert a cyclic prefix for each of the plurality of subcarriers of the first and second OFDM symbol time slots.

5. The node B base station of claim 1, wherein the transmission circuitry includes:

a plurality of antennas to transmit the mapped transmission data.

6. The node B base station of claim 1, wherein the transmission circuitry is configured to transmit the mapped transmission data to a plurality of user equipment (UE) receiver antennas.

7. The node B base station of claim 1, wherein the node B base station comprises a fourth generation (4G) wireless communication system base station.

8. The node B base station of claim 1, wherein the node B base station comprises a long term evolution (LTE) system base station.

9. A user equipment (UE) comprising

circuitry to receive data modulated according to an orthogonal frequency division multiple access (OFDMA) scheme, comprising:

mapped receiver data including data for physical resources assigned to a plurality of users mapped to a plurality of subcarriers of a first OFDM Orthogonal frequency division multiplexing) symbol time slot, and data for physical resources assigned to the plurality of users mapped to a plurality of subcarriers of a second OFDM symbol time slot, wherein data for physical resources assigned to at least one of the plurality of users is mapped to a different subcarrier in the first and second OFDM symbol time slots; and

downlink reference signal data included in at least one of the first or second OFDM symbol time slots; and

a demapping unit to demap the mapped receiver data.

10. The UE of claim 9, wherein the downlink reference signal data comprises common reference signal data.

11. The UE of claim 9, wherein the demapping unit to not process the downlink reference signal data.

12. The UE of claim 9, further comprising:

a cyclic prefix removal unit to remove a cyclic prefix for each of the plurality of subcarriers of the first and second OFDM symbol time slots.

13. The UE of claim 9, wherein the receiver circuitry to receive the data mapped according to the OFDMA scheme includes:

a plurality of antennas to receive the mapped transmission data.

14. The UE of claim 9, wherein the circuitry to receive the data mapped according to the OFDMA scheme is configured to receive the mapped transmission data from a plurality of node B base station transmission antennas.

15. The UE of claim 9, wherein the UE comprises a fourth generation (4G) wireless communication system UE.

16. The UE of claim 9, wherein the UE comprises a long term evolution (LTE) system UE.

17. A user equipment (UE) comprising:

circuitry to map uplink control data to physical resources modulated according to an orthogonal frequency division multiple access (OFDMA) scheme, wherein the mapped transmission data comprises;

uplink control data for a plurality of users mapped to a plurality of subcarriers of a first OFDM orthogonal frequency division multiplexing) symbol time slot; and

uplink control data for the plurality of users mapped to a plurality of subcarriers of a second OFDM symbol time slot, wherein data for at least one of the plurality of users is mapped to a different subcarrier in the first and second OFDM symbol time slots; and

transmission circuitry to transmit the first and the second OFDM symbol time slot data including the mapped transmission data.

18. The UE of claim 17, wherein the UE comprises a fourth generation (4G) wireless communication system UE.

19. The UE of claim 17, wherein the UE comprises a long term evolution (LTE) system UE.

20. An apparatus comprising:

a processor to execute Fourier transform functions to map transmission data to physical resources modulated according to an orthogonal frequency division multiple access (OFDMA) scheme, wherein the mapped transmission data comprises;

data for a plurality of users mapped to a plurality of subcarriers of a first OFDM orthogonal frequency division multiplexing) symbol time slot; and

data for the plurality of users mapped to a plurality of subcarriers of a second OFDM symbol time slot, wherein data for at least one of the plurality of users is mapped to a different subcarrier in the first and second OFDM symbol time slots; and

a memory to store the first and the second OFDM symbol time slot data including the mapped transmission data, wherein at least one of the first or second OFDM symbol time slot data further includes downlink reference signal data.

21. The apparatus of claim 20, wherein the downlink reference signal data comprises common reference signal data.

22. The apparatus of claim 20, further comprising:

a cyclic prefix insertion unit to insert a cyclic prefix for each of the plurality of subcarriers of the first and second OFDM symbol time slots.

23. An apparatus comprising:

a processor to execute Fourier transform functions to demap data modulated according to an orthogonal frequency division multiple access (OFDMA) scheme comprising;

mapped receiver data including data for a plurality of users mapped to a plurality of subcarriers of a first OFDM orthogonal frequency division multiplexing) symbol time slot, and data for the plurality of users mapped to a plurality of subcarriers of a second OFDM symbol time slot, wherein data for at least one of the plurality of users is mapped to a different subcarrier in the first and second OFDM symbol time slots; and

downlink reference signal data included in at least one of the first or second OFDM symbol time slots; and

a memory to store the demapped data.

24. The apparatus of claim 23, wherein the downlink reference signal data comprises common reference signal data.

25. The apparatus of claim 23, further comprising:

a cyclic prefix removal unit to remove a cyclic prefix for each of the plurality of subcarriers of the first and second OFDM symbol time slots.