Uplink pilot multiplexing in single user MIMO and SDMA for single carrier frequency division multiple access systems
First Claim
Patent Images
1. A method for pilot multiplexing in a wireless communication system, the method comprising:
- determining uplink pilot channel information in a base station, the determining uplink pilot channel information including determining a number of one or more active streams to be multiplexed;
transmitting the uplink pilot channel information to one or more wireless terminals to facilitate multiplexing uplink pilots by varying, for each active stream, pilot channel bandwidth and frequency location per resource block over time within a transmission time interval according to a predetermined function of the uplink pilot channel information; and
receiving and demultiplexing the multiplexed uplink pilots according to the predetermined function,wherein the frequency location of the multiplexed uplink pilots for each active stream is cyclically shifted across tones of the resource block over time within the transmission time interval to form a contiguous frequency block in each resource block.
2 Assignments
0 Petitions
Accused Products
Abstract
Systems and methodologies are described that facilitate adaptive uplink pilot multiplexing schemes. In various embodiments, frequency position and pilot channel bandwidth can be adaptively varied in a block over time based on the uplink channel data, such as the number of streams to be multiplexed. Thus, the provided adaptive uplink pilot multiplexing schemes provide flexible uplink pilot allocation schemes while maintaining single carrier waveform for improved transmit power efficiency and orthogonality of pilots within blocks for improve channel estimation and suppression of interference.
20 Citations
35 Claims
-
1. A method for pilot multiplexing in a wireless communication system, the method comprising:
-
determining uplink pilot channel information in a base station, the determining uplink pilot channel information including determining a number of one or more active streams to be multiplexed; transmitting the uplink pilot channel information to one or more wireless terminals to facilitate multiplexing uplink pilots by varying, for each active stream, pilot channel bandwidth and frequency location per resource block over time within a transmission time interval according to a predetermined function of the uplink pilot channel information; and receiving and demultiplexing the multiplexed uplink pilots according to the predetermined function, wherein the frequency location of the multiplexed uplink pilots for each active stream is cyclically shifted across tones of the resource block over time within the transmission time interval to form a contiguous frequency block in each resource block. - View Dependent Claims (2, 3)
-
-
4. A method for pilot multiplexing in a wireless communication system, the method comprising:
-
receiving uplink pilot channel information from a base station, the receiving uplink pilot channel information including receiving a number of one or more active streams to be multiplexed; multiplexing uplink pilots by varying, for each active stream, pilot channel bandwidth and frequency location per resource block over time within a transmission time interval in a wireless terminal according to a predetermined function of the uplink pilot channel information; and transmitting the uplink pilots, wherein the frequency location of the multiplexed uplink pilots for each active stream is cyclically shifted across tones of the resource block over time within the transmission time interval to form a contiguous frequency block in each resource block. - View Dependent Claims (5, 6, 7, 8)
-
-
9. A communications apparatus, comprising:
-
a memory that retains instructions for determining and transmitting uplink pilot channel information, receiving adaptively multiplexed pilots, and demultiplexing the received pilots according to a predetermined function of the uplink pilot channel information; and a processor that is configured to execute the instructions within the memory, wherein the instructions for determining and transmitting uplink pilot channel information further comprise instructions for determining a number of one or more active streams to be multiplexed. wherein the adaptively multiplexed pilots comprise pilots having, for each active stream, varying pilot channel bandwidth and frequency location per resource block over time within a transmission time interval, and wherein the frequency location of the multiplexed pilots for each active stream is cyclically shifted across tones of the resource block over time within the transmission time interval to form a contiguous frequency block in each resource block. - View Dependent Claims (10)
-
-
11. A communications apparatus, comprising:
-
a memory that retains instructions for receiving and processing uplink pilot channel information, adaptively multiplexing pilots by cyclically varying, for each active stream, the pilot channel bandwidth and frequency location per resource block over time within a transmission time interval based on the uplink pilot channel information, and transmitting the adaptively multiplexed pilots; and a processor that is configured to execute the instructions within the memory, wherein the instructions for receiving and processing uplink pilot channel information further comprise instructions for receiving and processing a number of one or more active streams to be multiplexed, and wherein the frequency location of the multiplexed pilots for each active stream is cyclically shifted across tones of the resource block over time within the transmission time interval to form a contiguous frequency block in each resource block. - View Dependent Claims (12, 13, 14)
-
-
15. A communications apparatus, comprising:
-
means for determining uplink pilot channel information in a base station, wherein the uplink pilot channel information includes a number of one or more active streams to be multiplexed; means for transmitting the uplink pilot channel information; means for receiving adaptively multiplexed pilots; and means for demultiplexing the received pilots according to a predetermined function of the uplink pilot channel information, wherein the adaptively multiplexed pilots comprise pilots having, for each active stream, varying pilot channel bandwidth and frequency location per resource block over time within a transmission time interval, and wherein the frequency location of the multiplexed pilots for each active stream is cyclically shifted across tones of the resource block over time within the transmission time interval to form a contiguous frequency block in each resource block. - View Dependent Claims (16, 17)
-
-
18. A communications apparatus, comprising:
-
means for receiving and processing uplink pilot channel information; means for adaptively multiplexing uplink pilots by cyclically varying, for each active stream, the pilot channel bandwidth and frequency location per resource block over time within a transmission time interval depending on the uplink pilot channel information; and means for transmitting the adaptively multiplexed uplink pilots, wherein the means for receiving and processing uplink pilot channel information further includes means for receiving and processing a number of one or more active streams to be multiplexed, and wherein the frequency location of the multiplexed pilots for each active stream is cyclically shifted across tones of the resource block over time within the transmission time interval to form a contiguous frequency block in each resource block. - View Dependent Claims (19, 20, 21)
-
-
22. A non-transitory machine-readable medium having computer-executable instructions stored thereon for:
-
determining a number of one or more active streams to be multiplexed, determining and transmitting uplink pilot channel information, receiving adaptively multiplexed pilots, and demultiplexing the received pilots according to a predetermined function of the uplink pilot channel information, wherein the adaptively multiplexed pilots comprise pilots having, for each active stream, varying pilot channel bandwidth and frequency location per resource block over time within a transmission time interval, and demultiplexing the received pilots having a cyclically shifted frequency location across tones of the resource block over time within the transmission time interval for each active stream. - View Dependent Claims (23, 24)
-
-
25. A non-transitory machine-readable medium having computer-executable instructions stored thereon for:
-
receiving and processing uplink pilot channel information; receiving, and processing a number of one or more active streams to be multiplexed; adaptively multiplexing pilots by regularly varying, for each active stream, the pilot channel bandwidth and frequency location per resource block over time within a transmission time interval based on the uplink pilot channel information; and transmitting the adaptively multiplexed pilots, wherein the frequency location of the multiplexed pilots for each active stream is cyclically shifted across tones of the resource block over time within the transmission time interval to form a contiguous frequency block in each resource block. - View Dependent Claims (26, 27, 28)
-
-
29. In a wireless communication system, an apparatus comprising:
-
a processor configured to; determine uplink pilot channel information in a base station, the uplink pilot channel information including a number of one or more active streams to be multiplexed; transmit the uplink pilot channel information to one or more wireless terminals to facilitate multiplexing uplink pilots by varying, for each active stream, pilot channel bandwidth and frequency location per resource block over time within a transmission time interval according to a predetermined function of the uplink pilot channel information; and receive and demultiplex the multiplexed uplink pilots according to the predetermined function, wherein the frequency location of the multiplexed pilots for each active stream is cyclically shifted across tones of the resource block over time within the transmission time interval to form a contiguous frequency block in each resource block. - View Dependent Claims (30, 31)
-
-
32. In a wireless communication system;
- an apparatus comprising;
a processor configured to; receive uplink pilot channel information from a base station; receive and process a number of one or more active streams to be multiplexed; multiplex uplink pilots by varying, for each active stream, pilot channel bandwidth and frequency location per resource block over time within a transmission time interval in a wireless terminal according to a predetermined function of the uplink pilot channel information; and transmit the uplink pilots, wherein the frequency location of the multiplexed pilots for each active stream is cyclically shifted across tones of the resource block over time within the transmission time interval to form a contiguous frequency block in each resource block. - View Dependent Claims (33, 34, 35)
- an apparatus comprising;
Specification