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Digit signal receiver and method for receiving digit signal

A digital signal and receiver technology, applied in the field of digital signal receivers, can solve the problems of delayed capture frequency offset time, offset, difficult to quickly capture and track frequency and other problems

Inactive Publication Date: 2004-07-14
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in the conventional technique, since there is an adaptive equalizer 40 as a delay line in the carrier recovery loop circuit 100, it is difficult to quickly capture and track the frequency offset due to signal delay
Since the carrier recovery unit 50 has to run from the initial equalization step, a signal that is not fully equalized is input to the carrier recovery unit 50, thereby delaying the time to capture the frequency offset

Method used

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  • Digit signal receiver and method for receiving digit signal
  • Digit signal receiver and method for receiving digit signal
  • Digit signal receiver and method for receiving digit signal

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Embodiment Construction

[0022] figure 2 The illustrated digital signal receiver includes an equalizer 20 , an original signal decision unit 22 , a carrier recovery unit and phase-lock detector 24 , a re-rotator 26 , and an equalizer coefficient update unit 28 .

[0023] The equalizer 20 is operated in such a way that a self-recovery equalization algorithm that is not affected by the phase is adopted in the initial stage, and a decision-oriented equalization algorithm is adopted after a predetermined time of operation of the self-recovery equalization algorithm, thereby compensating ) channel-induced amplitude distortion of the received signal x(n).

[0024] The original signal determination unit 22 determines the original signal from the signal z(n) from the equalizer 20 in the initial equalization phase, and determines the original signal from the signal y(n) from the carrier recovery unit and the phase-lock detector 24 after the initial equalization phase original signal. For example, when it is...

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Abstract

The present invention provides a digital signal receiver and method, the receiverincludes: the digital signal receiver includes an equalizer, an original signal discrimination section, a carrier restoration section and phase lock detecting unit, a re-rotating unit and a coefficients updating unit. The present invention is provided to restore a desired signal rapidly by applying a decision-intention equalizing algorithm after applying a self-equalizing algorithm to speed up a capturing time of a frequency offset.

Description

technical field [0001] The present invention relates to digital signal receivers, and in particular to such a digital signal receiver to which a self-restoring equalization algorithm is applied for an initial predetermined time and a decision directed algorithm is employed after the predetermined time has elapsed, and to A method of receiving digital signals. Background technique [0002] figure 1 Represents the structure of a conventional digital signal receiver disclosed in European Patent Application No. 92112305.5 entitled "Carrier Phase Recovery for an Adaptive Equalizer" (publication number 524559). [0003] figure 1 The digital signal receiver shown includes a transmitter 10 , a channel 11 , a carrier recovery loop circuit 100 , and a decoder 60 . The carrier recovery loop circuit 100 includes a demodulator 30 , an adaptive equalizer 40 , and a carrier recovery unit 50 . [0004] The signal received at transmitter 10 is input to demodulator 30 via channel 11 . A...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B3/06H04L25/03H04L27/01H04L27/22H04L27/38H04N5/44H04N5/455
CPCH04L25/03057H04L27/01
Inventor 安源翊
Owner SAMSUNG ELECTRONICS CO LTD