Phase error detection with conditional probabilities

Abstract

Apparatuses, systems, and methods that employ conditional probabilities to calculate phase errors are disclosed. For a received signal, the embodiments may develop several phase error estimates relative to each point of a constellation, the number and location of points of the constellation depending on the modulation technique of the received signal. In addition to calculating the phase error estimates, the embodiments may also calculate weights, or probabilities, associated with each of the estimates. The embodiments may use the estimates and the weights to calculate a composite phase error estimate. The composite phase error estimate may be used to correct the received signal and eliminate or reduce the impact of the phase error.

Description

technical field [0001] The embodiments herein belong to the field of communications. More specifically, these embodiments relate to methods and apparatus for detecting phase errors for a communication receiving device via conditional probability. Background technique [0002] In a typical radio frequency (RF) communication system, data may be processed at a transmitter device, modulated, filtered, amplified, and transmitted to one or more receiver devices. Typically, a transmitted signal experiences path loss, multipath interference, and other types of signal degradation before reaching a receiver device. A receiver device receives the modulated signal, performs various types of conditioning, and demodulates the conditioned signal to recover the transmitted data. Signal conditioning typically includes low noise amplification, filtering, automatic gain control, frequency down conversion, sampling, quantization, and the like. [0003] Modern communication systems use a vari...

AI Technical Summary

Problems solved by technology

For example, in some systems the received signal level may vary by more than 90dB

Images