Radio frequency (RF) sampling apparatus with arrays of time interleaved samplers and scenario based dynamic resource allocation

• US 9,014,124 B2
• Filed: 09/09/2013
• Issued: 04/21/2015
• Est. Priority Date: 03/03/2009
• Status: Active Grant

• Current Assignee: InterDigital Patent Holdings, Inc. (InterDigital, Inc.)
• Original Assignee: InterDigital Patent Holdings, Inc. (InterDigital, Inc.)
• Inventors: Haque, Tanbir, Kazakevich, Leonid, Newton, Scott M.
• Primary Examiner(s): Sloms, Nicholas
• Application Number:
  US14/021,086
• Publication Number:
  US 20140010103A1
• Time in Patent Office: 589 Days
• Field of Search: 370328-463, 455230-307
• US Class Current: 370/329
• CPC Class Codes: H03M 1/1215 using time-division multiplexing
• CPC Class Codes: H04B 1/28 the receiver comprising at least one semiconductor device having three or more electrodes
• CPC Class Codes: H04W 72/542 using measured or perceived quality

Abstract

A wireless transmit/receive unit (WTRU) is described. The WTRU includes a front-end unit (FEU), a signal processing unit (SPU), and a resource management unit (RMU). The FEU receives a radio frequency (RF) signal, generates time-interleaved samples, an includes: a first array of first time-interleaved samplers, a second array of second time-interleaved samplers, and a third array of third time-interleaved samplers. The SPU receives and combines the plurality of time-interleaved samples and generates a signal quality measurement and in-phase and quadrature-phase (IQ) complex samples. The RMU receives the signal quality measurement and allocates FEU resources in conjunction with a front-end unit controller (FEUC) based on the signal quality measurement. The FEUC generates control signals based on the received signal quality measurement from the RMU.

Claims

1. A wireless transmit/receive unit (WTRU), the WTRU comprising:

a front-end unit (FEU) configured to receive a radio frequency (RF) signal and to generate a plurality of time-interleaved samples, wherein the FEU includes;

a first array of first time-interleaved samplers,

a second array of second time-interleaved samplers, and

a third array of third time-interleaved samplers;

a signal processing unit (SPU) configured to receive and combine the plurality of time-interleaved samples and to generate a signal quality measurement and in-phase and quadrature-phase (IQ) complex samples; and

a resource management unit (RMU) configured to receive the signal quality measurement and allocate FEU resources in conjunction with a front-end unit controller (FEUC) based on the signal quality measurement,

wherein the FEUC is configured to generate a plurality of control signals based on the received signal quality measurement from the RMU.

2. The WTRU of claim 1, wherein the first and second time-interleaved samplers are time-interleaved charge samplers and the third time-interleaved samplers are time-interleaved voltage samplers.

3. The WTRU of claim 2, wherein the time-interleaved voltage samplers are analog to digital converters (A/Ds).

4. The WTRU of claim 2, wherein the time-interleaved charge samplers are time-interleaved bandpass charge samplers.

5. The WTRU of claim 2, wherein the time-interleaved charge samplers are time-interleaved lowpass charge samplers.

6. The WTRU of claim 1, wherein the first, second and third time-interleaved samplers are time-interleaved charge samplers.

7. The WTRU of claim 1, wherein the second array of second time-interleaved samplers includes at least two second time-interleaved samplers for every one of the first time-interleaved samplers in the first array of first time-interleaved samplers.

8. The WTRU of claim 1, wherein the third array of third time-interleaved samplers includes at least one third time-interleaved sampler for every one of the second time-interleaved samplers in the second array of second time-interleaved samplers.

9. The WTRU of claim 1, wherein a sampling rate of each of the second time-interleaved samplers is lower than a sampling rate of each of the first time-interleaved samplers.

10. The WTRU of claim 1, wherein each of the first, second and third time-interleaved samplers in each of the first, second and third arrays are configured to activate based on a pre-determined threshold.

11. The WTRU of claim 10, wherein, on a condition that the signal quality measurement is below the predetermined threshold, a subset of the first, second and third time-interleaved samplers in the first, second and third arrays are activated.

12. The WTRU of claim 10, wherein, on condition that the signal quality measurement is higher than the predetermined threshold, one or a subset of the first and second time-interleaved samplers in the first and second arrays and four or a subset of the third time-interleaved samplers in the third array associated with the one or the subset of the first and second time-interleaved samplers in the first and second arrays, are activated.

13. The WTRU of claim 1, wherein the signal quality is measured based on a received signal to total interference ratio.

14. The WTRU of claim 1, further comprising an array of de-multiplexers configured to connect each of the second time-interleaved samplers in the second array of second time-interleaved samplers to the third array of time-interleaved samplers.

15. The WTRU of claim 1, further comprising one of a multiplexer or a complex finite response (FIR) filter configured to combine the plurality of time-interleaved samples.

16. The WTRU of claim 1, further comprising a low noise amplifier (LNA) configured to receive the RF signal and to transmit the RF signal to the FEU.

17. The WTRU of claim 1, wherein a plurality of clock signals and the plurality of control signals are generated and used to control bias level and gain of the first and second time-interleaved samplers.

18. The WTRU of claim 1, wherein a plurality of clock signals and the plurality of control signals are generated and used to connect third time-interleaved samplers to first and second time-interleaved samplers.

19. The WTRU of claim 1, wherein a plurality of clock signals and the plurality of control signals are generated and used to control a resolution of the third time-interleaved samplers.

20. The WTRU of claim 1, wherein the FEU is configured to receive the plurality of control signals from the FEUC.