Peak to average power ratio (PAPR) reduction for repetition mode within single user, multiple user, multiple access, and/or MIMO wireless communications

• US 9,350,505 B2
• Filed: 07/30/2013
• Issued: 05/24/2016
• Est. Priority Date: 04/24/2011
• Status: Active Grant

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Porat, Ron, Zheng, Jun
• Primary Examiner(s): Kizou, Hassan
• Assistant Examiner(s): Bhatti, Hashim
• Application Number:
  US13/954,492
• Publication Number:
  US 20130315169A1
• Time in Patent Office: 1,029 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: H04B 2201/70706 with means for reducing the peak-to-average power ratio
• CPC Class Codes: H04B 7/0413 MIMO systems
• CPC Class Codes: H04L 27/2621 Reduction thereof using phase offsets between subcarriers
• CPC Class Codes: H04L 27/2666 Acquisition of further OFDM parameters, e.g. bandwidth, subcarrier spacing, or guard interval length
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]
• CPC Class Codes: Y02B 80/00 Architectural or constructional elements improving the thermal performance of buildings
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Selective processing of one or more packets to be transmitted from a wireless communication device to another wireless communication device is effective to reduce the peak to average power ratio (PAPR) of the transmission. The one or more packets are transmitted via two or more sub-bands of an available transmission medium. The number of coefficients or factors within that sequence corresponds to the number of sub-bands via which the one or more packets are to be transmitted. Also, a phase ramp or time-domain cyclic shift may be added to one or more of the packets after having undergone multiplication by one of the coefficients or factors within the sequence.

Claims

1. A wireless communication device comprising:

a processor configured to;

generate a packet for transmission to a recipient wireless communication device via a transmission medium partitioned into a plurality of sub-bands; and

multiply the packet by a sequence to generate a set of packets, wherein the sequence is effective to reduce or minimize peak to average power ratio (PAPR) of the set of packets, wherein the sequence includes at least two coefficients selected from a set that includes 1, −

1, j, and −

j; and

a communication interface configured to transmit at least two packets of the set of packets respectively via at least two sub-bands of the plurality of sub-bands.

2. The wireless communication device of claim 1, wherein the communication interface is further configured to:

transmit a first packet of the set of packets via a first sub-band of the plurality of sub-bands; and

transmit a second packet of the set of packets via a second sub-band of the plurality of sub-bands, wherein the first and second sub-bands have a common bandwidth.

3. The wireless communication device of claim 1, wherein the processor is further configured to add a time domain cyclic shift to a subset of the set of packets before the at least two packets of the set of packets undergo transmission via the communication interface.

4. The wireless communication device of claim 1, wherein the processor is further configured to multiply another packet by the sequence to generate another set of packets;

and

the communication interface is further configured to transmit at least two packets of the another set of packets respectively via the at least two sub-bands of the plurality of sub-bands.

5. The wireless communication device of claim 1 further comprising:

an access point (AP), wherein the recipient wireless communication device includes a laptop computer, a tablet, a personal digital assistant, a personal computer, or a cellular telephone.

6. The wireless communication device of claim 1, wherein the transmission medium is partitioned into a plurality of eight sub-bands and the sequence includes an eight coefficient vector [1, 1, −

1, −

1, −

1, −

1, 1, −

1] configured to generate eight packets.

7. The wireless communication device of claim 1, wherein the transmission medium is partitioned into a plurality of sixteen sub-bands and the sequence includes a sixteen coefficient vector [1 1 1 −

1 1 1 1 −

1 −

1 −

1 1 −

1 1 1 −

1 1] configured to generate sixteen packets.

8. The wireless communication device of claim 1 further comprising:

an access point (AP), wherein the recipient wireless communication device includes a wireless station (STA) or a smart meter station (SMSTA).

9. A wireless communication device comprising:

a processor configured to;

generate a packet for transmission to a recipient wireless communication device via a transmission medium partitioned into a plurality of sub-bands of substantially same size;

multiply the packet by a sequence, that includes at least two coefficients selected from a set that includes 1, −

1, j, and −

j, to generate a set of packets, wherein the sequence is effective to reduce or minimize peak to average power ratio (PAPR) among the set of packets; and

add a time domain cyclic shift to a subset of the set of packets to generate a modified subset of packets; and

a communication interface configured to;

transmit a first packet of the modified subset of packets via a first sub-band of the plurality of sub-bands; and

transmit a second packet of the modified subset of packets via a second sub-band of the plurality of sub-bands.

10. The wireless communication device of claim 9, wherein the set of packets includes one or more even numbered packets and one or more odd numbered packets;

and

the processor is further configured to add the time domain cyclic shift to the one or more odd numbered packets to generate the modified subset of packets.

11. The wireless communication device of claim 9, wherein the transmission medium is partitioned into eight sub-bands, and further comprising:

the processor configured to multiply another packet by another sequence that includes an eight coefficient vector [1, 1, −

1, −

1, −

1, −

1, 1, −

1] to generate eight packets; and

the communication interface configured to transmit the eight packets.

12. The wireless communication device of claim 9, wherein the transmission medium is partitioned into sixteen sub-bands, and further comprising:

the processor configured to multiply another packet by another sequence that includes a sixteen coefficient vector [1 1 1 −

1 1 1 1 −

1 −

1 −

1 1 −

1 1 1 −

1 1] to generate sixteen packets; and

the communication interface configured to transmit the sixteen packets.

13. The wireless communication device of claim 9 further comprising:

an access point (AP), wherein the recipient wireless communication device includes a wireless station (STA) or a smart meter station (SMSTA).

14. A method for execution by a wireless communication device, the method comprising:

generating a packet for transmission to a recipient wireless communication device via a transmission medium partitioned into a plurality of sub-bands;

multiplying the packet by a sequence to generate a set of packets, wherein the sequence is effective to reduce or minimize peak to average power ratio (PAPR) among the set of packets, wherein the sequence includes at least two coefficients selected from a set that includes 1, −

1, j, and −

j; and

via a communication interface of the wireless communication device, transmitting at least two packets of the set of packets respectively via at least two sub-bands of the plurality of sub-bands.

15. The method of claim 14 further comprising, via the communication interface of the wireless communication device:

transmitting a first packet of the at least two packets via a first sub-band of the plurality of sub-bands; and

transmitting a second packet of the at least two packets via a second sub-band of the plurality of sub-bands, wherein the first and second sub-bands have substantially a same size.

16. The method of claim 14 further comprising:

adding a time domain cyclic shift to a subset of the set of packets before the at least two packets of the set of packets undergo transmission via the communication interface.

17. The method of claim 14 further comprising:

multiplying another packet by the sequence to generate another set of packets; and

via the communication interface of the wireless communication device, transmitting at least some of the another set of packets respectively via the at least two sub-bands of the plurality of sub-bands.

18. The method of claim 14, wherein the wireless communication device includes an access point (AP), and the access point (AP), wherein the recipient wireless communication device includes a laptop computer, a tablet, a personal digital assistant, a personal computer, or a cellular telephone.

19. The method of claim 14, wherein the transmission medium is partitioned into sixteen sub-bands and the sequence includes a sixteen coefficient vector [1 1 1 −

1 1 1 1 −

1 −

1 −

1 1 −

1 1 1 −

1 1] configured to generate sixteen packets.

20. The method of claim 14, wherein the wireless communication device includes an access point (AP), and the recipient wireless communication device is a wireless station (STA) or a smart meter station (SMSTA).