Patent ID: 8503574
Filing Date: 2013-08-06
Classification: H04L

Abstract:
1. A receiver, comprising: a transceiver module receiving a radio frequency signal from an air interface and converting the radio frequency signal to a baseband signal according to a carrier frequency and a carrier frequency offset (CFO) compensation factor; an adaptive hierarchical signal de-mapping module demodulating the baseband signal according to one or more hierarchical level distance ratios to obtain a plurality of demodulated symbols; a decoding module comprising a plurality of decoding paths to hierarchically decode the demodulated symbols and detect error bits in each demodulated symbol, and generating a plurality of decoded signals in each decoding path; an error analyzing device receiving error bit information of each decoding path from the decoding module and estimating a bit error rate (BER) in each decoding path; and a frequency offset estimation device generating the CFO compensation factor according to the bit error rates.