Communication receiver enhancements using multi-signal capture
View Patent ↗A method and apparatus is disclosed to determine communications receiver parameters from multiple channels of a received communications signal and to configure and/or adjust communications receiver parameters to acquire one or more channels from among the multiple channels of the received communications signal. A communications receiver observes a multi-channel communication signal as it passes through a communication channel. The communications receiver determines one or more communications receiver parameters from the multiple channels of the received communications signal. The communications receiver configures and/or adjusts communications receiver parameters to acquire the one or more channels from among the multiple channels of the received communications signal.
1. A front end module for determining an operational setting of a communications receiver, the front end module comprising:
an auxiliary front end module configured to provide a first sequence of data based on a communications signal, the communications signal including a plurality of communications channels, and the first sequence of data occupying a first group of communications channels from among the plurality of communications channels;
a parameter estimation module configured to:
estimate a plurality of signal metrics of the plurality of communications channels,
determine a statistical relationship between the plurality of signal metrics, and
estimate, based on the statistical relationship and the first sequence of data, a communications receiver parameter;
a main front end module configured to provide a second sequence of data in accordance with the communications receiver parameter based on the communications signal, the second sequence of data occupying a second group of communications channels from among the plurality of communications channels, wherein the second group of communications channels includes a fewer number of communications channels than the first group of communications channels.
2. The front end module of claim 1 , wherein the plurality of communications channels are embedded within the communications signal, and wherein the main front end module comprises:
a mixer module configured to frequency translate a desired communications channel from among the plurality of communications channels using a local oscillator signal to provide a translated communications channel;
a low pass filtering module configured to remove noise or interference from the translated communications channel to provide a filtered communications channel; and
an analog to digital converter (ADC) configured to convert the filtered communications channel from an analog representation to a digital representation to provide the second sequence of data.
3. The front end module of claim 2 , wherein the main front end module further comprises:
a local oscillator generator module configured to provide the local oscillator signal and to adjust the local oscillator signal in response to the communications receiver parameter.
4. The front end module of claim 2 , wherein the low pass filtering module is further configured to adjust its frequency response in response to the communications receiver parameter.
5. The front end module of claim 1 , wherein the plurality of communications channels are embedded within the communications signal.
6. The front end module of claim 1 , wherein the parameter estimation module is further configured to estimate the plurality of signal metrics using a Fast Fourier Transform (FFT).
7. The front end module of claim 1 , wherein the plurality of signal metrics comprise:
a mean of the first sequence of data;
a total energy of the first sequence of data;
an average power of the first sequence of data;
a mean square of the first sequence of data;
an instantaneous power of the first sequence of data;
a root mean square of the first sequence of data;
a variance of the first sequence of data;
a norm of the first sequence of data;
a voltage level of the first sequence of data;
a phase offset between the first sequence of data and the second sequence of data;
a frequency offset between the first sequence of data and the second sequence of data; or
a timing offset between the first sequence of data and the second sequence of data.
8. The front end module of claim 1 , wherein the statistical relationship comprises:
a mean;
a medium;
a maximum;
a minimum;
a correlation; or
an auto-correlation.
9. The front end module of claim 1 , further comprising:
an amplifier module configured to amplify a received communications signal to provide the communications signal.
10. The front end module of claim 9 , wherein the amplifier module is further configured to adjust its gain based on the communications receiver parameter.
11. The front end module of claim 1 , wherein the front end module is coupled to a demodulator module, the demodulator module including an adaptive equalizer, the adaptive equalizer being configured to adjust its equalization coefficients based on the communications receiver parameter.
12. A method for determining an operational setting of a communications receiver, comprising:
determining a first sequence of data based on a communications signal, the communications signal including a plurality of communications channels, and the first sequence of data occupying a first group of communications channels from among the plurality of communications channels;
estimating a plurality of signal metrics of the plurality of communications channels;
determining a statistical relationship between the plurality of signal metrics; and
estimating, based on the statistical relationship and the first sequence of data, a communications receiver parameter; and
determining a second sequence of data in accordance with the communications receiver parameter based on the communications signal, the second sequence of data occupying a second group of communications channels from among the plurality of communications channels, wherein the second group of communications channels includes a fewer number of communications channels than the first group of communications channels.
13. The method of claim 12 , wherein the plurality of communications channels are embedded within the communications signal, and wherein the determining the second sequence of data comprises:
frequency translating a desired communications channel from among the plurality of communications channels using a local oscillator signal to provide a translated communications channel;
removing noise or interference from the translated communications channel to provide a filtered communications channel; and
converting the filtered communications channel from an analog representation to a digital representation to provide the second sequence of data.
14. The method of claim 12 , wherein the plurality of communications channels are embedded within the communications signal.
15. The method of claim 12 , wherein the plurality of signal metrics comprise:
a mean of the first sequence of data;
a total energy of the first sequence of data;
an average power of the first sequence of data;
a mean square of the first sequence of data;
an instantaneous power of the first sequence of data;
a root mean square of the first sequence of data;
a variance of the first sequence of data;
a norm of the first sequence of data;
a voltage level of the first sequence of data;
a phase offset between the first sequence of data and the second sequence of data;
a frequency offset between the first sequence of data and the second sequence of data; or
a timing offset between the first sequence of data and the second sequence of data.
16. The method of claim 12 , wherein the statistical relationship comprises:
a mean;
a medium;
a maximum;
a minimum;
a correlation; or
an auto-correlation.
17. The method of claim 12 , further comprising:
amplifying a received communications signal to provide the communications signal.
18. The method of claim 17 , further comprising:
adjusting a gain of an amplifier module based on the communications receiver parameter.
19. The method of claim 12 , further comprising:
compensating for unwanted distortion impressed on the second sequence of data using an equalization coefficient, the equalization coefficient being based on the communications receiver parameter.
20. A front end module of a communications receiver, comprising:
an auxiliary front end module configured to:
receive a communications signal including a plurality of communications channels, and
provide a first sequence of data based on the communications signal, the first sequence of data occupying a first group of communications channels from among the plurality of communications channels;
a main front end module configured to:
receive the communications signal, and
provide a second sequence of data based on the communications signal, the second sequence of data occupying a second group of communications channels from among the plurality of communications channels, wherein the second group of communications channels includes a fewer number of communications channels than the first group of communications channels; and
a parameter estimation module configured to:
estimate a plurality of signal metrics of the plurality of communications channels,
determine a statistical relationship between the plurality of signal metrics, and
estimate, based on the statistical relationship and the first sequence of data, a communications receiver parameter, and
initiate processing the first sequence of data and the second sequence of data based on the communications receiver parameter.
21. The front end module of claim 20 , wherein the parameter estimation module is further configured to:
estimate the communications receiver parameter based on the second sequence of data.
22. The front end module of claim 20 , further comprising:
a demodulator module, wherein the parameter estimation module is further configured to estimate the communications receiver parameter based on demodulator information communicated by the demodulator module.
23. The front end module of claim 20 , wherein the parameter estimation module is further configured to:
estimate the communications receiver parameter based on a relationship between the first sequence of data and the second sequence of data.
24. The front end module of claim 20 , wherein each signal metric in the plurality of signal metrics corresponds to each channel in the plurality of communications channels.
25. The front end module of claim 20 , wherein the parameter estimation module is further configured to:
compare the plurality of signal metrics to determine the statistical relationship between the plurality of signal metrics.
26. The front end module of claim 20 , wherein the statistical relationship comprises:
a mean;
a medium;
a maximum;
a minimum;
a correlation; or
an auto-correlation.