ASYMMETRICAL RECEIVERS FOR WIRELESS COMMUNICATION

• US 20150017989A1
• Filed: 09/30/2014
• Published: 01/15/2015
• Est. Priority Date: 07/24/2009
• Status: Active Grant

• Current Assignee: AT&T Mobility II LLC (AT&T, Inc.)
• Original Assignee: AT&T Mobility II LLC (AT&T, Inc.)
• Inventors: Brisebois, Arthur Richard
• Granted Patent: US 9,191,036 B2
• Time in Patent Office: Days
• US Class Current: 455/436
• CPC Class Codes: H04B 1/006 using switches for selecting the desired band H04B1/0057 takes precedence
• CPC Class Codes: H04B 1/1036 with automatic suppression of narrow band noise or interference, e.g. by using tuneable notch filters H04B1/123 takes precedence; filter circuits H03H
• CPC Class Codes: H04B 1/7097 Interference-related aspects
• CPC Class Codes: H04B 2201/709709 Methods of preventing interference
• CPC Class Codes: H04B 7/0413 MIMO systems
• CPC Class Codes: H04B 7/0626 Channel coefficients, e.g. channel state information [CSI]
• CPC Class Codes: H04B 7/0871 using different reception schemes, at least one of them being a diversity reception scheme
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/006 Quality of the received signal, e.g. BER, SNR, water filling
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 72/30 Resource management for broadcast services
• CPC Class Codes: H04W 72/52 based on load

Abstract

Receivers in a mobile device are configured to mitigate receiver overload and fully or nearly-fully utilize available spectrum for communication. Configuration is dictated at least in part by at least one of radio link quality or available receiver specifications, and it can be affected by the mobile device or a base station that serves the mobile device. Receiver configuration includes various spectrally asymmetric receivers that tune respective disparate portions of the available spectrum to maximize utilization thereof in the spectral regions prone to overload conditions. In severe overload conditions, a single receiver can be configured to operate in a frequency band spectrally adjacent to a sub-band that leads to overload conditions when employed for telecommunication. To improve performance, the single receiver configuration can be supplemented with at least one of transmit diversity operation, asymmetric multicarrier spreading, or downlink power boost of asymmetrical multicarrier spreading.

Claims

1. A method, comprising:

in response to determining that channel state information of a receiver of a set of receivers of a wireless communication device satisfies a first defined condition that is based on a first level of channel quality with respect to a first determined quality of a pilot signal associated with the receiver, scheduling, by a system comprising a processor, a multiple-input multiple-output communication;

in response to determining that the channel state information satisfies a second defined condition that is based on the first defined condition and a second level of channel quality with respect to a second determined quality of the pilot signal, scheduling, by the system, a multiple-input single-output communication; and

initiating, by the system, a first provisioning of a first receiver of the set of receivers corresponding to a first filter associated with a first portion of an electromagnetic radiation spectrum, and initiating a second provisioning of a second receiver of the set of receivers corresponding to a second filter associated with a second portion of the electromagnetic radiation spectrum.

2. The method of claim 1, wherein the first portion of the electromagnetic radiation spectrum comprises a wide band comprising a sub-band adjacent to a frequency block utilized for broadcast of a wireless signal, and wherein the second portion of the electromagnetic radiation spectrum comprises a narrow band that spectrally overlaps the wide band, wherein the wide band encompasses a greater range of frequencies than the narrow band.

3. The method of claim 1, further comprising:

probing an overload condition associated with saturation of an amplifier of the set of receivers.

4. The method of claim 3, wherein the probing of the overload condition comprises determining the overload condition based on an overload criterion comprising a set of channel state information thresholds that distinguish the overload condition from a non-overload condition.

5. The method of claim 1, wherein the scheduling the multiple-input multiple-output communication comprises scheduling the multiple-input multiple-output communication in response to a channel quality indicator of the receiver being determined to be below the first level of channel quality and above the second level of channel quality, wherein the second level is lower than the first level, and wherein the scheduling the multiple-input single-output communication comprises switching a configuration of the receiver from a multiple-input multiple-output communication mode to a multiple-input single-output communication mode.

6. The method of claim 5, wherein the switching the configuration comprises switching the configuration utilizing asymmetric multicarrier spreading.

7. The method of claim 5, further comprising:

restoring, by the system, a communication in a non-overload condition associated with saturation of an amplifier of the set of receivers in response to the channel quality indicator being determined to be above the first level of channel quality.

8. An apparatus, comprising:

a processor; and

a memory that stores executable instructions that, when executed by the processor, facilitate performance of operations, comprising;

in response to determining that channel state information associated with a mobile device satisfies a first defined condition that is based on a first level of channel quality with respect to a first determined quality of a pilot signal of a receiver of the mobile device, initiating a first configuration of the receiver of the mobile device according to a multiple-input multiple-output communication mode;

in response to determining that the channel state information satisfies a second defined condition that is based on the first defined condition and a second level of channel quality with respect to a second determined quality of the pilot signal of the receiver, initiating a second configuration of the receiver of the mobile device according to a multiple-input single-output communication mode; and

provisioning a first receiver of the mobile device corresponding to a first filter associated with a first portion of an electromagnetic radiation spectrum and a second receiver of the mobile device corresponding to a second filter associated with a second portion of the electromagnetic radiation spectrum.

9. The apparatus of claim 8, wherein the first defined condition and the second defined condition are associated with respective overload conditions associated with a saturation of an amplifier of the receiver.

10. The apparatus of claim 8, wherein the first defined condition corresponds to an overload condition associated with a saturation of an amplifier of the receiver.

11. The apparatus of claim 8, wherein the second defined condition corresponds to an overload condition associated with a saturation of an amplifier of the receiver.

12. The apparatus of claim 8, wherein the initiating the second configuration comprises initiating the second configuration of the receiver utilizing asymmetric multicarrier spreading.

13. A method, comprising:

in response to determining that a set of radio link conditions for a set of wireless receivers of a device satisfies a first defined condition that is based on a first signal quality associated with a first characteristic of a pilot signal of a wireless receiver of the set of wireless receivers, initiating, by a system comprising a processor, a first configuration of the wireless receiver according to a multiple-input multiple-output communication mode;

in response to determining that the set of radio link conditions satisfies a second defined condition that is based on the first defined condition and a second signal quality associated with a second characteristic of the pilot signal of the wireless receiver, initiating, by the system, a second configuration of the wireless receiver according to a multiple-input single-output communication mode; and

initiating, by the system, a first activation of a first wireless receiver of the set of wireless receivers and a second activation of a second wireless receiver of the set of wireless receivers, wherein the first wireless receiver comprises a first filter associated with a first portion of electromagnetic radiation spectrum, and wherein the second wireless receiver comprises a second filter associated with a second portion of the electromagnetic radiation spectrum.

14. The method of claim 13, further comprising:

conveying, by the system, the set of radio link conditions directed to a base station device.

15. The method of claim 13, wherein the wireless receiver comprises a third filter associated with a third portion of the electromagnetic radiation spectrum based on data representing a finite gain roll-off coefficient.

16. The method of claim 13, wherein the second portion of the electromagnetic radiation spectrum partially overlaps the first portion of the electromagnetic radiation spectrum.

17. The method of claim 13, further comprising:

securing, by the system, a radio resource grant based on the set of radio link conditions.

18. The method of claim 13, wherein the initiating the second configuration comprises utilizing asymmetric multicarrier spreading.

19. The method of claim 13, wherein the initiating the first configuration comprises initiating the first configuration in response to a channel quality indicator of the wireless receiver being determined to be below the first signal quality and above the second signal quality, wherein the second signal quality is lower than the first signal quality.

20. The method of claim 13, wherein the initiating the second configuration comprises switching a configuration of the receiver from the multiple-input multiple-output communication mode to the multiple-input single-output communication mode.