Subscriber station transceiver allocation of groups of subcarriers between a plurality of transceiver antennas
View Patent ↗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.
1. A method of a subscriber station transceiver allocating and transmitting groups of subcarriers between a plurality of transceiver antennas, comprising:
the subscriber station transceiver receiving at least one downlink signal through each of the plurality of subscriber station antennas;
the subscriber station transceiver characterizing a received signal of the at least one downlink signal over multiple subcarriers;
the subscriber station transceiver allocating 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.
2. The method of claim 1 , wherein characterizing a receive signal comprises characterizing a received signal power of the receive signal.
3. The method of claim 2 , wherein allocating groups of subcarriers comprises allocating the subcarriers based on the received signal power.
4. The method of claim 1 , wherein allocating groups of subcarriers for uplink transmission through each of the plurality of subscriber antennas, comprises allocating the groups based on an expected uplink channel quality as estimated based on the characterized received signals of the at least one downlink signal over multiple subcarriers.
5. The method of claim 4 , wherein the expected uplink channel quality comprises at least one of an expected uplink capacity, an expected uplink signal to noise ratio, expected uplink total received signal power.
6. The method of claim 4 , wherein the expected uplink channel quality comprises at least one of an estimated downlink capacity, an estimated downlink received signal power, an estimated downlink received signal-to-noise ratio.
7. The method of claim 1 , wherein allocating groups of subcarriers comprises allocating based on at least one of a sum of receive signal powers across the plurality of subscriber station antennas, a sum signal-to-noise ratios across the plurality of subscriber antennas, a weighted sum of signal-to-noise ratios across the plurality of subscriber antennas.
8. The method of claim 1 , wherein the subscriber station transceiver characterizing the received downlink signals is based on a plurality of subcarriers.
9. The method of claim 1 , wherein the subscriber station transceiver characterizing a received signal power of the at least one downlink signal over multiple subcarriers comprises characterizing pilot tones of a preamble of a downlink sub-frame of the at least one downlink signal.
10. The method of claim 9 , wherein the subscriber station transceiver characterizing the pilot tones of the preamble is based on subcarriers of the preamble corresponding to the group of subcarriers to be allocated on the uplink.
11. The method of claim 1 , wherein the subscriber characterizing the received signal of the at least one downlink signal over multiple subcarriers occurs over a range of subcarriers that overlap the group of subcarriers to be allocated on the uplink.
12. The method of claim 1 , wherein the subscriber characterizing the received signal of the at least one downlink signal includes a single subcarrier that occurs within the range of subcarriers as the group of subcarriers to be allocated on the uplink.
13. The method of claim 1 , wherein the subscriber characterizing the downlink received signals includes characterizations of downlink signals over a plurality of frames.
14. The method of claim 1 , wherein allocating groups of subcarriers for uplink transmission through each of the plurality of subscriber antennas comprises allocating groups of subcarriers to based on downlink channel quality metrics subject to meeting transmit power constraints of the subscriber station transceiver.
15. The method of claim 1 , wherein allocating groups of subcarriers for uplink transmission through each of the plurality of subscriber antennas comprises sorting a difference of vector downlink channel quality metrics from the plurality of subscriber station antennas.
16. The method of claim 15 , wherein allocating groups of subcarriers for uplink transmission through each of the plurality of subscriber antennas additionally comprises:
performing initial allocations based on the sorting of difference vector downlink channel quality metrics;
determining a number of groups of subcarriers allocated to each subscriber antenna; and
modifying the initial allocations of groups of subcarriers to meet transmit power constraints of the subscriber station transceiver while causing minimal change to the downlink quality metric.
17. The method of claim 1 , wherein the subscriber characterizing the received signal power of the downlink signals over multiple subcarriers comprises filtering downlink channel estimates.
18. The method of claim 1 , wherein allocating groups of subcarrier for uplink transmission through each of the plurality of subscriber antennas comprises allocating groups of subcarriers within at least one sub-channel.
19. The method of claim 1 , wherein each the groups of subcarriers comprises pilot tones and data tones of multiple subcarriers over multiple multi-carrier symbols.
20. The method of claim 1 , wherein the groups of subcarriers are defined by a Worldwide Interoperability for Microwave Access (WiMAX) (UL (uplink) PUSC (Partial Usage of Subchannels).
21. The method of claim 1 , wherein the groups of subcarriers are defined by Band Adaptive Modulation and Coding (BAMC) bins.
22. The method of claim 1 , wherein the groups of subcarriers are defined by Long Term Evolution (LTE) physical resource blocks.
23. The method of claim 1 , wherein characterizing the received downlink signals comprises determining a relative signal power difference between multiple subcarrier signals received through each of the plurality of subscriber antennas.
24. The method of claim 1 , further comprising maintaining the allocations of the groups of subcarriers for a time interval greater than a minimum time interval of the groups of allocated subcarriers during an UL transmission.