Data receiver
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsKazuhisa Tsubaki, Kouji Abe, Mitsuru Uesugi, Kouichi Honma
Life of this patent
Estimating the term…
Abstract
A data receiver which enhances a probability of frame synchronization even if a transmission line quality is bad detects a specific bit sequence in a received signal demodulated by a demodulator to deduce a transmission line quality by a line quality deducer. If the transmission line quality is so bad that a frame synchronization detector cannot detect the specific bit sequence, the specific bit sequence is detected from a received signal demodulated by an equalizer after the elimination of a transmission line distortion.
Claims7
A data receiver which receives an input signal and outputs a data signal and a frame synchronization signal for frame processing of said data signal, said data receiver comprising:
- a demodulator for receiving said input signal, demodulating data from said input signal to produce a first demodulated data output and producing error information for deducing a transmission line quality;
- a line quality deducer for receiving said input signal and deducing the transmission line quality base don the error information and the input signal to produce a transmission line quality signal;
- an equalizer for receiving said input signal and deducing the transmission line quality based on the error information and the input signal to produce a transmission line quality signal;
- a frame synchronization detector for receiving said first demodulated data output and said second demodulated data output and detecting a specific bit sequence from the first demodulated data output or the second demodulated data output and producing and outputting said frame synchronization signal;
- and
- a selector for selecting the first demodulated data output or the second demodulated data output as said data signal in accordance with said transmission line quality signal and outputting said data signal.
Dependencies are inferred from the claim text.