Wireless network receiver

• US 9,136,813 B2
• Filed: 06/03/2014
• Issued: 09/15/2015
• Est. Priority Date: 11/25/2013
• Status: Active Grant

• Current Assignee: Texas Instruments, Inc.
• Original Assignee: Texas Instruments, Inc.
• Inventors: Qiu, Wenxun, Schmidl, Timothy Mark, Fu, Minghua, Batra, Anuj
• Primary Examiner(s): Garcia, Santiago
• Application Number:
  US14/294,879
• Publication Number:
  US 20150146823A1
• Time in Patent Office: 469 Days
• Field of Search: 375/345
• US Class Current: 1/1
• CPC Class Codes: H03G 3/3078 Circuits generating control signals for digitally modulated signals
• CPC Class Codes: H03G 3/3089 Control of digital or coded signals
• CPC Class Codes: H03M 3/042 with adaptable step size, e.g. adaptive differential pulse code modulation [ADPCM]
• CPC Class Codes: H04B 1/123 using adaptive balancing or compensation means adaptive filter circuits and algorithms H03H
• CPC Class Codes: H04B 17/20 of receivers
• CPC Class Codes: H04B 7/0811 during preamble or gap period
• CPC Class Codes: H04L 27/14 Demodulator circuits; Receiver circuits

Abstract

A wireless network receiver includes a detection module that uses preamble data in a data frame for signal processing functions and the detection module is configured to adjust the number of preamble data bits that are used based on the power of a received signal.

Claims

1. A wireless network receiver, comprising:

a preamble detection module that uses preamble bits in a data frame for signal processing functions; and

wherein the preamble detection module adjusts the number of preamble bits that are used in response to the power of a received signal;

wherein the preamble detection module performs a plurality of signal processing functions using the preamble bits;

wherein the number of preamble bits that are used by each signal processing function is variable based on the power of the received signal; and

wherein at least one signal processing function uses a predetermined maximum number of preamble bits where the predetermined maximum number is based on limiting processor instruction cycles.

2. A wireless network receiver, comprising:

a preamble detection module that uses preamble bits in a data frame for signal processing functions;

wherein the preamble detection module adjusts the number of preamble bits that are used in response to the power of a received signal; and

an automatic amplifier gain control module that measures the power of the received signal and sends power information to the preamble detection module;

wherein the power information specifies a number of amplifier gain adjustment steps that will be required in response to the power of the received signal; and

wherein the preamble detection module uses a first number of preamble bits for signal processing when the required number of gain adjustment steps is zero, and where the detection module uses a second number of preamble bits for signal processing when the required number of gain adjustment steps is one.

3. The wireless network receiver of claim 2, where the preamble detection module uses a third number of preamble bits for signal processing when the required number of gain adjustment steps is greater than one.

4. A method, comprising:

receiving, by a wireless network receiver, a signal;

using, by a preamble detector module in the wireless network receiver, preamble bits in the signal for signal processing;

adapting, by the preamble detector module, the number of preamble bits being used, in response to the power of the signal;

determining, by an amplifier module, the number of amplifier gain adjustment steps needed, based on the power of the signal;

sending, by the amplifier module, information indicating the number of amplifier gain adjustment steps needed to the preamble detector module; and

the step of adapting further comprising;

using, by the preamble detector module, a first number of preamble bits for signal processing when the number of amplifier gain adjustment steps is zero; and

using, by the preamble detector module, a second number of preamble bits for signal processing when the number of amplifier gain adjustment steps is one.

5. The method of claim 4, the step of adapting further comprising:

using, by the preamble detector module, a third number of preamble bits for signal processing when the number of amplifier gain adjustment steps is greater than one.

6. A method, comprising:

receiving, by a wireless network receiver, a signal;

using, by a preamble detector module in the wireless network receiver, preamble bits in the signal for signal processing;

adapting, by the preamble detector module, the number of preamble bits being used, in response to the power of the signal;

determining, by an amplifier module, the number of amplifier gain adjustment steps needed, based on the power of the signal;

sending, by the amplifier module, information indicating the number of amplifier gain adjustment steps needed to the preamble detector module; and

the step of adapting further comprising;

using, by the preamble detector module, a first number of preamble bits for signal processing when the number of amplifier gain adjustment steps is below a predetermined threshold; and

using, by the preamble detector module, a second number of preamble bits for signal processing when the number of amplifier gain adjustment steps is greater than the predetermined threshold.

7. A method, comprising:

recording, by a wireless network receiver, a history of the power of received signals;

receiving, by the wireless network receiver, a signal;

using, by a preamble detector module in the network receiver, preamble bits in the signal for signal processing; and

adapting, by the preamble detector module, the number of preamble bits being used, based on the history of the power of received signals; and

where the history of the power of received signals comprises a history of the number of amplifier gain adjustment steps required by previously received signals.