Channel-sensitive power control
AssigneeMaxLinear, Inc.
InventorsJames Qiu, Sridhar Ramesh, Sheng Ye, Curtis Ling
Life of this patent
Estimating the term…
Abstract
A communication receiver which applies signal processing for quantitatively estimating receive signal factors such as communication channel quality, signal characteristics, and overall system received bit error rate (BER) or packet error rate (PER) and which applies a general algorithm for mapping these estimated factors to control receiver performance and minimize power consumption.
Claims28
An architecture for a channel-sensitive power control, said architecture comprising:
- a Receiver Front End, for receiving an incoming signal from a communication channel and for processing said incoming signal in a plurality of circuits to determine communication channel quality, signal characteristics and overall system received bit error rate/packet error rate, and generating a digital signal;
- Signal Strength Detectors for receiving signals from said plurality of circuits, said signal strength detectors sensing the signal strength of each of said signals and generating signal strength information;
- and
- a Back End for estimating receive signal factors based on said signal strength information, and for mapping via an algorithm said receive signal factors and sending control signals based on said receive signal factors to said receiver for optimizing power consumption of said receiver front end.
A method for optimizing receiver power consumption as a function of receive signal factors, comprising:
- a) detecting presence of blockers;
- b) detecting magnitude of said blockers;
- c) determine sensitivity to frequency location and signal strength of blocker signals;
- d) estimating changing channel and fading conditions;
- e) detecting a signal to noise ratio and a signal strength of a desired signal;
- f) detecting received modulation scheme and order, such as OFDM or 16 QAM;
- g) detecting received coding scheme and code rate, such as convolutional coding or rate ⅔;
- h) optimizing receiver power consumption based on processed information from steps a) to g);
- and
- i) adjusting receiver performance parameters according to a system bit error rate/packet error rate.
A method for optimizing receiver power consumption as a function of signal conditions, comprising the steps of:
- a) processing an incoming signal in a receiver front end circuit;
- b) generating a digital signal in the receiver front end circuit;
- c) analyzing said processed incoming signals in a Signal Strength Detectors block;
- d) passing signal strength information and said digital signal to a back end circuit;
- e) processing said signal strength information and said digital signal in said back end circuit;
- (f) sending processed information from said back end circuit to said receiver front end circuit to optimize receiver power consumption of said receiver front end circuit as a function of said incoming signal conditions;
- and
- g) adjusting receiver performance parameters according to a system bit error rate/packet error rate.
A method for optimizing receiver power consumption as a function of receive signal conditions, comprising the steps of:
- a) processing a signal in a receiver front end circuit, further comprising the components:
- I a variable gain amplifier;
- II a mixer coupled to a local oscillator;
- III a filter;
- and
- IV an analog-to-digital-converter providing a digital signal;
- b) sending a signal from said variable gain amplifier to a Signal Strength Detectors block;
- c) sending a signal from said mixer to said Signal Strength Detectors block;
- d) sending a signal from the filter to said Signal Strength Detectors block;
- e) sending said digital signal from said analog-to-digital-converter to said Signal Strength Detectors block;
- f) passing signal strength information from said Signal Strength Detectors block and said digital signal to a Receive Signal Factors estimator in a back end circuit;
- g) calculating the frequency location and amplitude of interfering signals in said Receive Signal Factors estimator;
- and
- h) using frequency location and amplitude information in a Receiver Performance Parameters control of said back end circuit to adjust the power consumption of the components of said receiver front end circuit of steps Ito IV.
A method for optimizing receiver power consumption as a function of signal conditions, comprising the steps of:
- a) determining the signal mode by sensing/demodulation or by a database;
- b) sensing the channel quality, blocker amplitudes and frequency offsets;
- c) setting the power mode for the signal path and synthesizer;
- d) setting the Channel Estimation performance level;
- and
- e) repeating steps b) through d).
Dependencies are inferred from the claim text.