Frequency and phase offset compensation of modulated signals with symbol timing recovery

摘要

Systems and methods are provided in which a wireless receiver can be configured to compensate frequency and phase offsets with joint symbol timing recovery of modulated signals transmitted across a channel, and it can include a transformation module configured to generate an error signal for an information signal representing the modulated signal received by the receiver. The transformation module can include a squaring module configured to square the information signal, thereby generating a squared signal, and a mixer configured to perform a complex multiplication of the squared signal by the local reference signal, and a downsampler. The transformation module can also be configured to extract and compensate frequency and phase offsets with joint symbol timing recovery.

主权项

1. A radio frequency receiver configured to receive a modulated signal transmitted across a channel, the radio frequency receiver comprising:
one or more transformation modules, each of the one or more transformation modules configured to generate an error signal for a digital information signal representing a digitized version of the modulated signal received by the receiver, each transformation module comprising:
a squaring module configured to square the digital information signal, thereby generating a squared digital information signal; anda first mixer configured to perform a complex multiplication of the squared digital information signal by a local reference signal; a symbol timing estimator module, configured to estimate a symbol timing of the received signal based on an error signal generated by the one or more transformation module, and to generate a symbol timing signal; a frequency offset estimator module, configured to estimate a frequency offset of the received signal based on an error signal generated by the one or more transformation modules; a phase offset estimator module configured to estimate a phase error in the received signal based on an error signal generated by the one or more transformation modules.