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Subscriber station transceiver allocation of groups of subcarriers between a plurality of transceiver antennas

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Subscriber station transceiver allocation of groups of subcarriers between a plurality of transceiver antennas


Embodiments for at least one method and apparatus of a subscriber station transceiver allocating and transmitting groups of subcarriers between a plurality of transceiver antennas are disclosed. One method includes the subscriber station transceiver receiving at least one downlink signal through each of the plurality of subscriber station antennas. The subscriber station transceiver characterizes a received signal of the at least one downlink signal over multiple subcarriers. The subscriber station transceiver allocates groups of subcarriers for uplink transmission through each of the plurality of subscriber antennas, wherein the allocation is based on the characterized received signal of the at least one downlink signal over multiple subcarriers.
Related Terms: Uplink Allocation Antenna Downlink Transceiver Subscriber

Browse recent Broadcom Corporation patents - Irvine, CA, US
USPTO Applicaton #: #20130329679 - Class: 370329 (USPTO) - 12/12/13 - Class 370 
Multiplex Communications > Communication Over Free Space >Having A Plurality Of Contiguous Regions Served By Respective Fixed Stations >Channel Assignment

Inventors: Sam P. Alex, Louay Jalloul, Robert G. Lorenz

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The Patent Description & Claims data below is from USPTO Patent Application 20130329679, Subscriber station transceiver allocation of groups of subcarriers between a plurality of transceiver antennas.

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RELATED APPLICATIONS

This application is a continuation of U.S. application Ser. No. 13/526,100, filed Jun. 18, 2012, assigned U.S. Pat. No. 8,515,476, which is a continuation of U.S. application Ser. No. 12/567,217, filed Sep. 25, 2009, now U.S. Pat. No. 8,204,527, which claims benefit to U.S. Provisional Application No. 61/194,846, filed Oct. 1, 2008, all of which are hereby incorporated by reference in its entirety.

FIELD OF THE DESCRIBED EMBODIMENTS

The described embodiments relate generally to wireless communications. More particularly, the described embodiments relate to allocating groups of subcarriers between a plurality of antennas of a transceiver.

BACKGROUND

Wireless networks are gaining popularity because wireless infrastructures are typically easier and less expensive to deploy than wired networks. A popular wireless network implementation uses base stations that communicate with wireless user devices that are located within cells formed by the base stations.

The wireless user devices are commonly referred to as wireless subscriber stations. A wireless subscriber station commonly employs a single antenna. Configuring the subscriber station to have multiple antennas can be beneficial because intelligent multiple antenna transmission schemes (such as spatial multiplexing) can be utilized. However, transmission from multiple antennas may require adjustment of a phase between the transmission signals, which in some cases can be difficult to implement.

It is desirable to have a method of optimizing uplink transmission of subscriber station transceivers using multiple antennas.

SUMMARY

An embodiment includes a method of a subscriber station transceiver allocating and transmitting groups of subcarriers between a plurality of transceiver antennas. The method includes the subscriber station transceiver receiving at least one downlink signal through each of the plurality of subscriber station antennas. The subscriber station transceiver characterizes a received signal of the at least one downlink signal over multiple subcarriers. The subscriber station transceiver allocates groups of subcarriers for uplink transmission through each of the plurality of subscriber antennas, wherein the allocation is based on the characterized received signal of the at least one downlink signal over multiple subcarriers.

Other aspects and advantages of the described embodiments will become apparent from the following detailed description, taken in conjunction with the accompanying drawings, illustrating by way of example the principles of the described embodiments.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows an example of a base station and a subscriber station transceiver, wherein multiple propagation channels are &mined between a base station antenna and each subscriber station antenna.

FIG. 2 shows an example of a block diagram of subscriber station transceiver employing multiple antennas.

FIG. 3 shows a flow chart that includes steps of an example of a method for assigning groups of adjacent subcarriers to each of a plurality of antennas.

FIG. 4A shows an example of a group of subcarriers that includes pilot subcarriers and data subcarriers over multiple multi-carrier symbols.

FIG. 4B shows another example of a group of subcarriers that includes pilot subcarriers and data subcarriers over multiple multi-carrier symbols.

FIG. 5 shows an example of six groups of subcarriers over multiple symbols.

FIG. 6 shows an example of groups of subcarriers that have been allocated between two subscriber station antennas.

FIG. 7 shows an example of measurements taken over a range of frequencies of the downlink signals, and the corresponding allocating of groups of subcarriers between two subscriber station antennas, based on the measurements.

FIG. 8 shows a flow chart of steps of an example of a method of a subscriber station transceiver allocating and transmitting groups of subcarriers between a plurality of transceiver antennas.



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Sounding reference signal transmission
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Industry Class:
Multiplex communications
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stats Patent Info
Application #
US 20130329679 A1
Publish Date
12/12/2013
Document #
13970356
File Date
08/19/2013
USPTO Class
370329
Other USPTO Classes
International Class
04W72/04
Drawings
9


Uplink
Allocation
Antenna
Downlink
Transceiver
Subscriber


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